Power failure unlocking control circuit and charging equipment

Abstract

The utility model relates to the technical field of new energy, in particular to a power failure unlocking control circuit and charging equipment, the charging equipment comprises a direct current charging pile, and the circuit comprises a voltage output module, an energy storage module and a power failure control module; the voltage output module is connected with the controller and the power-down control module, the power-down control module is connected with the energy storage module, and the voltage output module and the energy storage module are used for receiving voltage signals provided by the direct current charging pile. The voltage output module is used for receiving the first driving signal / the second driving signal output by the controller and controlling the electronic lock to be locked / unlocked based on the first driving signal / the second driving signal; and the energy storage module is used for controlling the power-down control module to output a third driving signal to the voltage output module based on the voltage signal when the DC charging pile is powered down, so that the voltage output module controls the electronic lock to be unlocked. On the basis, the function of automatic unlocking during power failure can be realized through the energy storage module, and the charging gun can be pulled out after power failure while the cost is saved.

Description

[Technical field]

[0001] The utility model relates to the technical field of new energy, and in particular to a power-off unlocking control circuit and a charging device. [Background technology]

[0002] With the vigorous development of new energy, the technological change of automobile energy power system has become the focus and core of automobile technology development. In actual use, for the purpose of safety, each DC charging gun is equipped with an electronic lock to prevent the electric vehicle from pulling out the gun while charging. However, when the DC charging pile has an abnormal power outage or power failure, the gun head of the DC charging gun cannot be directly pulled out, resulting in the electric vehicle being unable to leave directly after charging is completed.

[0003] To address this problem, the prior art uses an integrated chip to detect the state of the electronic lock. However, the integrated chip detection method is complex in structure, resulting in a high detection failure rate and greatly increasing the cost. In addition, after the electronic lock is abnormally powered off, the motor cannot restore the lock piece to the initial position in time, causing the electronic lock to remain locked and unable to return to the unlocked state, resulting in the charging gun being unable to be unplugged. [Contents of the utility model]

[0004] The embodiment of the utility model provides a power-off unlocking control circuit and a charging device, aiming to solve the technical problem in the prior art that a charging gun cannot be directly unplugged after a DC charging pile loses power.

[0005] In order to solve the above technical problems, a technical solution adopted by the embodiment of the utility model is: to provide a power-off unlocking control circuit, which is applied to a charging device, wherein the charging device includes an electronic lock, a controller and a DC charging pile, the DC charging pile is used to provide a voltage signal, and the power-off unlocking control circuit includes a voltage output module, an energy storage module and a power-off control module;

[0006] The voltage output module is connected to the controller and the power-off control module respectively, the power-off control module is connected to the energy storage module, and the voltage output module and the energy storage module are both used to receive the voltage signal;

[0007] The voltage output module is also connected to the electronic lock, and the voltage output module is used to receive the first drive signal output by the controller when the DC charging pile works normally, and control the electronic lock to lock based on the first drive signal; or

[0008] receiving a second driving signal output by the controller, and controlling the electronic lock to unlock based on the second driving signal;

[0009] The energy storage module is used to control the power-off control module to output a third drive signal to the voltage output module based on the voltage signal when the DC charging pile loses power, so that the voltage output module controls the electronic lock to unlock according to the third drive signal.

[0010] Optionally, the voltage output module includes a first output unit and a second output unit;

[0011] The first output unit and the second output unit are connected to the controller and the power-off control module respectively, the first output unit and the second output unit are connected to the electronic lock, and the first output unit and the second output unit also receive the voltage signal;

[0012] The first output unit is used to receive a high-level signal and convert the voltage signal into a positive pressure output based on the high-level signal, so that the electronic lock is locked according to the positive pressure;

[0013] The second output unit is used to receive a high-level signal and convert the voltage signal into a negative pressure output based on the high-level signal, so that the electronic lock is unlocked according to the negative pressure.

[0014] Optionally, the first output unit includes a diode D1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a switch tube Q1, a switch tube Q2 and a switch tube Q3;

[0015] The anode of the diode D1 is used to connect to the controller, the cathode of the diode D1 is connected to the control end of the switch tube Q1 through the resistor R1, the first end of the switch tube Q1 receives a voltage signal through the resistor R2, the first end of the switch tube Q1 is also connected to the control end of the switch tube Q2 through the resistor R3, the second end of the switch tube Q1 is respectively connected to the control end of the switch tube Q3 and the resistor R4, the resistor R4 is used for grounding, the first end of the switch tube Q2 is used to receive a voltage signal, the second end of the switch tube Q2 is connected to the first end of the electronic lock, the first end of the switch tube Q3 is connected to the second end of the electronic lock, and the second end of the switch tube Q3 is used for grounding.

[0016] Optionally, the second output unit includes a diode D3, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a switch tube Q4, a switch tube Q5 and a switch tube Q6;

[0017] The anode of the diode D3 is connected to the controller through the resistor R5, the cathode of the diode D3 is connected to the control end of the switch tube Q4, the first end of the switch tube Q4 is connected to the DC charging pile through the resistor R6, the first end of the switch tube Q4 is also connected to the control end of the switch tube Q5 through the resistor R7, the second end of the switch tube Q4 is respectively connected to the control end of the switch tube Q6 and the resistor R8, the resistor R8 is also connected to the ground end, the first end of the switch tube Q5 is connected to the DC charging pile, the second end of the switch tube Q5 is connected to the second end of the electronic lock, the first end of the switch tube Q6 is connected to the first end of the electronic lock, and the second end of the switch tube Q6 is used for grounding.

[0018] Optionally, the power-off unlocking control circuit further includes a first output interface and a second output interface, the first output interface is used to connect to the first end of the electronic lock, the second output interface is used to connect to the second end of the electronic lock, and the voltage output module further includes a protection unit;

[0019] The protection unit is connected to the first output unit and the second output unit respectively, and the protection unit is also connected to the first output interface and the second output interface respectively;

[0020] The protection unit is used to perform EDS protection on the first output interface and the second output interface.

[0021] Optionally, the protection unit includes a magnetic bead L1, a magnetic bead L2, a TVS tube D4 and a TVS tube D5;

[0022] The first end of the magnetic bead L1 is connected to the second end of the first output unit and the first end of the second output unit respectively, the second end of the magnetic bead L1 is connected to the ground end through the TVS tube D5, and the second end of the magnetic bead L1 is also connected to the first output interface, the first end of the magnetic bead L2 is connected to the first end of the first output unit and the second end of the second output unit respectively, the second end of the magnetic bead L2 is connected to the ground end through the TVS tube D4, and the second end of the magnetic bead L2 is also connected to the second output interface.

[0023] Optionally, the energy storage module includes capacitor C1, capacitor C2, capacitor C3 and capacitor C4;

[0024] The first end of the capacitor C1 is connected to the DC charging pile, and the first end of the capacitor C1 is also connected to the power-off control module. The second end of the capacitor C1 is used for grounding. The capacitors C2, C3 and C4 are all connected in parallel with the capacitor C1.

[0025] Optionally, the power-off control module includes a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a switch tube Q7, a switch tube Q8 and a diode D6;

[0026] The first end of the switch tube Q7 is connected to the energy storage module, and the first end of the switch tube Q7 is also connected to the control end of the switch tube Q7 through the resistor R9 and the resistor R11. The resistor R9 is also connected to the ground end through the resistor R10, and the resistor R11 is also connected to the DC charging pile. The second end of the switch tube Q7 is connected to the anode of the diode D6 through the resistor R12, and the cathode of the diode D6 is connected to the second output unit. The cathode of the diode D6 is also connected to the control end of the switch tube Q8 through the resistor R13, and the control end of the switch tube Q8 is also connected to the ground end through the resistor R14. The first end of the switch tube Q8 is connected to the first output unit, and the second end of the switch tube Q8 is used for grounding.

[0027] Optionally, the power-off unlocking control circuit further includes an anti-backflow module;

[0028] The anti-backflow module is connected to the DC charging pile and the energy storage module respectively;

[0029] The anti-backflow module is used to prevent the current in the energy storage module from flowing into the DC charging pile when the DC charging pile loses power;

[0030] Wherein, the anti-backflow module is a diode D2;

[0031] The anode of the diode D2 is connected to the DC charging pile, and the cathode of the diode D2 is connected to the voltage output module and the energy storage module respectively.

[0032] In order to solve the above technical problems, another technical solution adopted by the embodiment of the utility model is: to provide a charging device, the charging device comprising:

[0033] DC charging pile;

[0034] Controller;

[0035] Electronic locks; and

[0036] The power-off unlock control circuit as described above.

[0037] Different from the related art, the utility model provides a power-off unlocking control circuit and a charging device, wherein the charging device includes an electronic lock, a controller and a DC charging pile, the DC charging pile is used to provide a voltage signal, and the power-off unlocking control circuit includes a voltage output module, an energy storage module and a power-off control module; the voltage output module is connected to the controller and the power-off control module respectively, the power-off control module is connected to the energy storage module, and the voltage output module and the energy storage module are both used to receive the voltage signal. The voltage output module is also connected to the electronic lock, and the voltage output module is used to receive the first drive signal output by the controller when the DC charging pile is working normally, and control the electronic lock to lock based on the first drive signal; or receive the second drive signal output by the controller, and control the electronic lock to unlock based on the second drive signal; the energy storage module is used to control the power-off control module to output a third drive signal to the voltage output module based on the voltage signal when the DC charging pile is powered off, so that the voltage output module controls the electronic lock to unlock according to the third drive signal. Based on this, when the DC charging pile suddenly loses power, the energy storage module can be used to realize the function of automatic unlocking when power is lost, thereby saving costs and allowing the charging gun to be unplugged after power is lost.

Brief Description of the Drawings

[0038] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0039] Figure 1 It is a structural block diagram of a charging device provided by an embodiment of the utility model;

[0040] Figure 2 It is a structural block diagram of a power-off unlocking control circuit provided by an embodiment of the utility model;

[0041] Figure 3a-3b The utility model provides a circuit diagram of a power-off unlocking control circuit according to an embodiment of the utility model. [Specific implementation method]

[0042] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0043] The technical features involved in the various embodiments of the present application described below do not conflict with each other and can be combined with each other.

[0044] When an element is referred to as being “connected to” another element, it can be directly connected to the other element, or one or more intervening elements may be present therebetween.

[0045] The terms "first", "second", etc. in the specification and claims of the present utility model are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more.

[0046] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0047] See also Figure 1 , Figure 1 is a structural block diagram of a charging device provided by an embodiment of the utility model, such as Figure 1 As shown, the charging device 100 includes a controller 10, an electronic lock 20, a DC charging pile 30 and a power-off unlocking control circuit 40; the power-off unlocking control circuit 40 is connected to the electronic lock 20, the DC charging pile 30 and the controller 10 respectively.

[0048] Specifically, the DC charging pile 30 is used to charge the car to be charged (not shown) through the power-off unlocking control circuit 40. When the DC charging pile 30 is charging the car to be charged, the controller 10 will output a first drive signal to the power-off unlocking control circuit 40, so that the power-off unlocking control circuit 40 controls the electronic lock 20 to lock, thereby preventing the charging gun from being unplugged during the charging process, and then causing accidents such as leakage; and after the charging of the car to be charged is completed, the controller 10 will output a second drive signal to the power-off unlocking control circuit 40, so that the power-off unlocking control circuit 40 controls the electronic lock 20 to unlock, so that the DC charging pile 30 can be normally plugged in and unplugged after charging the car to be charged. Among them, when the DC charging pile 30 suddenly loses power, the power-off unlocking control circuit 40 will output a third drive signal to the electronic lock 20, so that the charging gun can be normally unplugged and the car to be charged can leave normally. It should be noted that when the DC charging pile 30 suddenly loses power, the DC charging pile 30 has no current output. Since the DC charging pile 30 suddenly loses power during the charging process, the electronic lock 20 is in a locked state. Therefore, it is necessary to output a third drive signal to unlock the electronic lock 20 so that the car to be charged can drive away normally.

[0049] In some embodiments, the charging device 100 further includes a voltage converter (not shown), which is connected to the DC charging pile 30 and the power-off unlocking control circuit 40 respectively, and is used to convert the voltage output by the DC charging pile 30 into a voltage signal, so as to power the power-off unlocking control circuit 40 based on the voltage signal. Preferably, the voltage signal is 12V.

[0050] See also Figure 2 , Figure 2 : is a structural block diagram of a power-off unlocking control circuit provided by an embodiment of the utility model, such as Figure 2 As shown, the power-off unlocking control circuit 40 includes a voltage output module 41, an energy storage module 42 and a power-off control module 43;

[0051] The voltage output module 41 is connected to the controller 10 and the power-off control module 43 respectively, the power-off control module 43 is connected to the energy storage module 42 , and both the voltage output module 41 and the energy storage module 42 are used to receive the voltage signal.

[0052] The voltage output module 41 is also connected to the electronic lock 20, and the voltage output module 41 is used to receive the first drive signal output by the controller 10 when the DC charging pile 30 is working normally, and control the electronic lock 20 to lock based on the first drive signal; or

[0053] receiving a second driving signal output by the controller 10, and controlling the electronic lock 20 to unlock based on the second driving signal;

[0054] The energy storage module 42 is used to control the power-off control module 43 to output a third drive signal to the voltage output module 41 based on the voltage signal when the DC charging pile 30 loses power, so that the voltage output module 41 controls the electronic lock 20 to unlock according to the third drive signal.

[0055] Specifically, when the DC charging pile 30 is working normally, the energy storage module 42 will store the voltage signal output by the DC charging pile 30, and when the DC charging pile 30 is powered off, the DC charging pile 30 will no longer output the voltage signal, and the controller 10 is also in a power-off state. At this time, the energy storage module 42 will output the stored voltage signal to the control end of the power-off control module 43 to turn on the power-off control module 43. When the power-off control module 43 is turned on, the power-off control module 43 will output a third drive signal to the control end of the voltage output module 41, so that the voltage output module 41 controls the electronic lock 20 to unlock according to the third drive signal, so that in the case of power failure, the charging gun can still be plugged in and out normally. It should be noted that the first drive signal, the second drive signal and the third drive signal are all level signals of preset time. When the voltage output module 41 receives the level signal, it will be turned on for a short time based on the level signal, thereby outputting an excitation signal (positive pressure or negative pressure) to lock or unlock the electronic lock 20, thereby preventing the electronic lock 20 from being damaged due to long-term voltage reception.

[0056] In some embodiments, since the second driving signal and the third driving signal are both used to control the electronic lock 20 to unlock, the second driving signal and the third driving signal can be signals of the same level.

[0057] Further, such as Figure 2 As shown, the voltage output module 41 includes a first output unit 411 and a second output unit 412;

[0058] The first output unit 411 and the second output unit 412 are connected to the controller 10 and the power-off control module 43 respectively, the first output unit 411 and the second output unit 412 are connected to the electronic lock 20, and the first output unit 411 and the second output unit 412 also receive the voltage signal;

[0059] The first output unit 411 is used to receive a high-level signal and convert the voltage signal into a positive pressure output based on the high-level signal, so that the electronic lock 20 is locked according to the positive pressure;

[0060] The second output unit 412 is used to receive a high-level signal, and convert the voltage signal into a negative pressure output based on the high-level signal, so that the electronic lock 20 is unlocked according to the negative pressure.

[0061] It should be noted that both the first output unit 411 and the second output unit 412 are turned on based on a high-level signal. Therefore, in some embodiments, the first drive signal is to input a high-level signal to the first output unit 411, to input a low-level signal to the second output unit 412, or to input no signal to the second output unit 412; the second drive signal and the third drive signal are to input a low-level signal to the first output unit 411, or to input no signal to the first output unit 411, and to input a high-level signal to the second output unit 412.

[0062] Specifically, when the DC charging pile 30 works normally, the controller 10 outputs a high-level signal to the first output unit 411 and outputs a low-level signal to the second output unit 412. When the first output unit 411 receives the high-level signal, the first output unit 411 is in a conducting state, thereby outputting the voltage signal to the first end of the electronic lock 20; the second output unit 412 is in a cut-off state due to receiving the low-level signal, so that the second end of the electronic lock 20 is connected to the ground end, and the electronic lock 20 receives a positive pressure. When the electronic lock 20 needs to be unlocked, the controller 10 outputs a high-level signal to the second output unit 412 and outputs a low-level signal to the control end of the first output unit 411. At this time, the second output unit 412 is in a conducting state, and the first output unit 411 is in a cut-off state, so that the first end of the electronic lock 20 is connected to the ground end, and the second end of the electronic lock 20 receives the voltage signal, so that the electronic lock 20 receives a negative pressure.

[0063] In some embodiments, see Figure 3a-3b , Figure 3a-3b is a circuit diagram of a power-off unlocking control circuit provided by an embodiment of the utility model, such as Figure 3a As shown, the first output unit 411 includes a diode D1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a switch tube Q1, a switch tube Q2 and a switch tube Q3;

[0064] The anode of the diode D1 is used to connect to the controller, the cathode of the diode D1 is connected to the control end of the switch tube Q1 through the resistor R1, the first end of the switch tube Q1 is connected to the DC charging pile through the resistor R2, the first end of the switch tube Q1 is also connected to the control end of the switch tube Q2 through the resistor R3, the second end of the switch tube Q1 is respectively connected to the control end of the switch tube Q3 and the resistor R4, the resistor R4 is used for grounding, the first end of the switch tube Q2 is connected to the DC charging pile, the second end of the switch tube Q2 is connected to the first end of the electronic lock, the first end of the switch tube Q3 is connected to the second end of the electronic lock, and the second end of the switch tube Q3 is used for grounding.

[0065] like Figure 3a As shown, the second output unit 412 includes a diode D3, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a switch tube Q4, a switch tube Q5 and a switch tube Q6;

[0066] The anode of the diode D3 is connected to the controller through the resistor R5, the cathode of the diode D3 is connected to the control end of the switch tube Q4, the first end of the switch tube Q4 is connected to the DC charging pile through the resistor R6, the first end of the switch tube Q4 is also connected to the control end of the switch tube Q5 through the resistor R7, the second end of the switch tube Q4 is respectively connected to the control end of the switch tube Q6 and the resistor R8, the resistor R8 is also connected to the ground end, the first end of the switch tube Q5 is connected to the DC charging pile, the second end of the switch tube Q5 is connected to the second end of the electronic lock, the first end of the switch tube Q6 is connected to the first end of the electronic lock, and the second end of the switch tube Q6 is used for grounding.

[0067] Specifically, when the DC charging pile 30 charges the car to be charged, the controller 10 will output a high-level signal to the switch tube Q1, and output a low-level signal to the switch tube Q4, so that the switch tube Q1 is turned on based on the high-level signal, and the switch tube Q4 is turned off based on the low-level signal. At this time, the voltage signal output by the DC charging pile 30 is divided by the resistor R2 and the resistor R4, so that the switch tube Q2 and the switch tube Q3 are turned on. When the switch tube Q2 is turned on, the voltage signal will be input to the first end of the electronic lock 20; when the switch tube Q3 is turned on, the second end of the electronic lock 20 will be grounded through the switch tube Q3. At this time, the electronic lock 20 is in a positive pressure state, thereby locking the electronic lock 20.

[0068] When the charging of the vehicle to be charged is completed, the controller 10 will output a high-level signal to the control end of the switch tube Q4, and output a low-level signal to the control end of the switch tube Q1, so that the switch tube Q4 is turned on and the switch tube Q1 is turned off. When the switch tube Q1 is turned off, the first output unit 411 does not work; when the switch tube Q4 is turned on, the voltage signal is divided by the resistor R6 and the resistor R8, so that the switch tube Q5 and the switch tube Q6 are turned on because the turn-on condition is met. When the switch tube Q5 and the switch tube Q6 are turned on, the first end of the electronic lock 20 is grounded, and the second end of the electronic lock 20 receives the voltage signal, so that the electronic lock 20 is in a negative pressure state, and the electronic lock 20 is unlocked.

[0069] It should be noted that when the controller 10 outputs a low-level signal to the switch tube Q1 or the switch tube Q4, since the low-level signal is not necessarily 0, it may cause the switch tube Q1 or the switch tube Q4 to be mis-conducted. Therefore, by setting the diode D3, the resistor R5 and the diode D1, the resistor R1 to increase the conduction threshold of the switch tube Q4 and the switch tube Q1, thereby avoiding the mis-conduction of the switch tube Q1 and the switch tube Q4. In some embodiments, the diode D1 and the diode D3 can also be a voltage regulator tube, and the conduction threshold of the switch tube Q1 and the switch tube Q4 is increased by the voltage regulator tube D1 and the voltage regulator tube D3.

[0070] In some embodiments, Figure 2 As shown, the power-off unlocking control circuit 40 further includes a first output interface (not shown) and a second output interface (not shown), the first output interface is used to connect to the first end of the electronic lock 20, the second output interface is used to connect to the second end of the electronic lock 20, and the voltage output module 41 further includes a protection unit 413;

[0071] The protection unit 413 is connected to the first output unit 411 and the second output unit 412 respectively, and the protection unit 413 is also connected to the first output interface and the second output interface respectively;

[0072] The protection unit 413 is used to provide electrostatic protection for the first output interface and the second output interface.

[0073] Further, such as Figure 3a As shown, the protection unit 413 includes a magnetic bead L1, a magnetic bead L2, a TVS tube D4 and a TVS tube D5;

[0074] The first end of the magnetic bead L1 is connected to the second end of the first output unit 411 and the first end of the second output unit 412 respectively, the second end of the magnetic bead L1 is connected to the ground end through the TVS tube D5, and the second end of the magnetic bead L1 is also connected to the first output interface, the first end of the magnetic bead L2 is connected to the first end of the first output unit 411 and the second end of the second output unit 412 respectively, the second end of the magnetic bead L2 is connected to the ground end through the TVS tube D4, and the second end of the magnetic bead L2 is also connected to the second output interface.

[0075] It can be known that by arranging the magnetic bead L1 with the TVS tube D5 and the magnetic bead L2 with the TVS tube D4, the first output interface and the second output interface are protected from electrostatics, thereby preventing the static electricity generated externally from damaging the internal circuit when the first output interface and the second output interface are suspended, or preventing the static electricity generated by the electronic lock 20 from damaging the internal circuit, thereby improving the safety of the circuit.

[0076] In some embodiments, Figure 3a As shown, the energy storage module 42 includes capacitor C1, capacitor C2, capacitor C3 and capacitor C4;

[0077] The first end of the capacitor C1 is connected to the DC charging pile 30, and the first end of the capacitor C1 is also connected to the power-off control module 43. The second end of the capacitor C1 is used for grounding. The capacitors C2, C3 and C4 are all connected in parallel with the capacitor C1.

[0078] Further, such as Figure 3b As shown, the power-off control module 43 includes a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a switch tube Q7, a switch tube Q8 and a diode D6;

[0079] The first end of the switch tube Q7 is connected to the energy storage module 42, and the first end of the switch tube Q7 is also connected to the control end of the switch tube Q7 through the resistor R9 and the resistor R11. The resistor R9 is also connected to the ground end through the resistor R10, and the resistor R11 is also connected to the DC charging pile 30. The second end of the switch tube Q7 is connected to the anode of the diode D6 through the resistor R12, and the cathode of the diode D6 is connected to the second output unit 412. The cathode of the diode D6 is also connected to the control end of the switch tube Q8 through the resistor R13, and the control end of the switch tube Q8 is also connected to the ground end through the resistor R14. The first end of the switch tube Q8 is connected to the first output unit 411, and the second end of the switch tube Q8 is used for grounding.

[0080] Specifically, when the DC charging pile 30 works normally, the DC charging pile 30 will output a voltage signal to the capacitors C1, C2, C3 and C4 to charge the capacitors C1, C2, C3 and C4. At the same time, the voltage signal will also be input to the control end of the switch tube Q7 through the resistor R11. At this time, since the switch tube Q7 does not meet the conduction condition and is turned off, the power-off control module 43 stops working.

[0081] When the DC charging pile 30 loses power, the capacitors C1, C2, C3 and C4 output the stored voltage signal to the first end of the switch tube Q7. At the same time, the voltage signal is also divided by the resistors R9 and R10 and input to the control end of the switch tube Q7. At this time, the switch tube Q7 is turned on because the conduction condition is met. When the switch tube Q7 is turned on, the voltage signal is input to the control end of the switch tube Q4 through the diode D6. Since the voltage signal is at a high level, the switch tube Q4 is in a conducting state. At the same time, the voltage signal is also input to the control end of the switch tube Q8 through the resistor R13, so that the switch tube Q8 is turned on. When the switch tube Q8 is turned on, the first end of the switch tube Q8 is connected to the ground end, so that the switch tube Q1 is cut off due to receiving a low-level signal. Based on this, the electronic lock 20 is unlocked by receiving a negative pressure, so that the electronic lock 20 can also be unlocked normally after the DC charging pile 30 loses power.

[0082] In yet another embodiment, Figure 2 As shown, the power-off unlocking control circuit 40 also includes an anti-backflow module 44, and the anti-backflow module 44 is connected to the DC charging pile 30 and the energy storage module 42 respectively;

[0083] The backflow prevention module 44 is used to prevent the current in the energy storage module 42 from flowing into the DC charging pile 30 when the DC charging pile 30 loses power.

[0084] Specifically, Figure 3a As shown, the anti-backflow module 44 is a diode D2;

[0085] The anode of the diode D2 is connected to the DC charging pile 30 , and the cathode of the diode D2 is connected to the voltage output module 41 and the energy storage module 42 , respectively.

[0086] The embodiment of the utility model provides a power-off unlocking control circuit, which is applied to a charging device, wherein the charging device includes an electronic lock, a controller and a DC charging pile, the DC charging pile is used to provide a voltage signal, and the power-off unlocking control circuit includes a voltage output module, an energy storage module and a power-off control module; the voltage output module is connected to the controller and the power-off control module respectively, the power-off control module is connected to the energy storage module, and the voltage output module and the energy storage module are both used to receive the voltage signal. The voltage output module is also connected to the electronic lock, and the voltage output module is used to receive the first drive signal output by the controller when the DC charging pile is working normally, and control the electronic lock to lock based on the first drive signal; or receive the second drive signal output by the controller, and control the electronic lock to unlock based on the second drive signal; the energy storage module is used to control the power-off control module to output a third drive signal to the voltage output module based on the voltage signal when the DC charging pile is powered off, so that the voltage output module controls the electronic lock to unlock according to the third drive signal. Based on this, when the DC charging pile suddenly loses power, the energy storage module can be used to realize the function of automatic unlocking when power is lost, thereby saving costs and allowing the charging gun to be unplugged after power is lost.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the idea of ​​the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A power-off unlocking control circuit, characterized in that: Applied to charging equipment, wherein the charging equipment includes an electronic lock, a controller and a DC charging pile, the DC charging pile is used to provide a voltage signal, and the power-off unlocking control circuit includes a voltage output module, an energy storage module and a power-off control module; The voltage output module is connected to the controller and the power-off control module respectively, the power-off control module is connected to the energy storage module, and the voltage output module and the energy storage module are both used to receive the voltage signal; The voltage output module is also connected to the electronic lock, and the voltage output module is used to receive the first drive signal output by the controller when the DC charging pile works normally, and control the electronic lock to lock based on the first drive signal; or receiving a second driving signal output by the controller, and controlling the electronic lock to unlock based on the second driving signal; The energy storage module is used to control the power-off control module to output a third drive signal to the voltage output module based on the voltage signal when the DC charging pile loses power, so that the voltage output module controls the electronic lock to unlock according to the third drive signal.

2. The power-off unlocking control circuit according to claim 1, characterized in that: The voltage output module includes a first output unit and a second output unit; The first output unit and the second output unit are connected to the controller and the power-off control module respectively, the first output unit and the second output unit are connected to the electronic lock, and the first output unit and the second output unit also receive the voltage signal; The first output unit is used to receive a high-level signal and convert the voltage signal into a positive pressure output based on the high-level signal, so that the electronic lock is locked according to the positive pressure; The second output unit is used to receive a high-level signal and convert the voltage signal into a negative pressure output based on the high-level signal, so that the electronic lock is unlocked according to the negative pressure.

3. The power-off unlocking control circuit according to claim 2, characterized in that: The first output unit includes a diode D1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a switch tube Q1, a switch tube Q2 and a switch tube Q3; The anode of the diode D1 is used to connect to the controller, the cathode of the diode D1 is connected to the control end of the switch tube Q1 through the resistor R1, the first end of the switch tube Q1 is connected to the DC charging pile through the resistor R2, the first end of the switch tube Q1 is also connected to the control end of the switch tube Q2 through the resistor R3, the second end of the switch tube Q1 is respectively connected to the control end of the switch tube Q3 and the resistor R4, the resistor R4 is used for grounding, the first end of the switch tube Q2 is connected to the DC charging pile, the second end of the switch tube Q2 is connected to the first end of the electronic lock, the first end of the switch tube Q3 is connected to the second end of the electronic lock, and the second end of the switch tube Q3 is used for grounding.

4. The power-off unlocking control circuit according to claim 3, characterized in that: The second output unit includes a diode D3, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a switch tube Q4, a switch tube Q5 and a switch tube Q6; The anode of the diode D3 is connected to the controller through the resistor R5, the cathode of the diode D3 is connected to the control end of the switch tube Q4, the first end of the switch tube Q4 is connected to the DC charging pile through the resistor R6, the first end of the switch tube Q4 is also connected to the control end of the switch tube Q5 through the resistor R7, the second end of the switch tube Q4 is respectively connected to the control end of the switch tube Q6 and the resistor R8, the resistor R8 is also connected to the ground end, the first end of the switch tube Q5 is connected to the DC charging pile, the second end of the switch tube Q5 is connected to the second end of the electronic lock, the first end of the switch tube Q6 is connected to the first end of the electronic lock, and the second end of the switch tube Q6 is used for grounding.

5. The power-off unlocking control circuit according to claim 2, characterized in that: The power-off unlocking control circuit further includes a first output interface and a second output interface, the first output interface is used to connect to the first end of the electronic lock, the second output interface is used to connect to the second end of the electronic lock, and the voltage output module further includes a protection unit; The protection unit is connected to the first output unit and the second output unit respectively, and the protection unit is also connected to the first output interface and the second output interface respectively; The protection unit is used to provide electrostatic protection for the first output interface and the second output interface.

6. The power-off unlocking control circuit according to claim 5, characterized in that: The protection unit includes a magnetic bead L1, a magnetic bead L2, a TVS tube D4 and a TVS tube D5; The first end of the magnetic bead L1 is connected to the second end of the first output unit and the first end of the second output unit respectively, the second end of the magnetic bead L1 is connected to the ground end through the TVS tube D5, and the second end of the magnetic bead L1 is also connected to the first output interface, the first end of the magnetic bead L2 is connected to the first end of the first output unit and the second end of the second output unit respectively, the second end of the magnetic bead L2 is connected to the ground end through the TVS tube D4, and the second end of the magnetic bead L2 is also connected to the second output interface.

7. The power-off unlocking control circuit according to claim 1, characterized in that: The energy storage module includes capacitor C1, capacitor C2, capacitor C3 and capacitor C4; The first end of the capacitor C1 is connected to the DC charging pile, and the first end of the capacitor C1 is also connected to the power-off control module. The second end of the capacitor C1 is used for grounding. The capacitors C2, C3 and C4 are all connected in parallel with the capacitor C1.

8. The power-off unlocking control circuit according to claim 2, characterized in that: The power-off control module includes a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a switch tube Q7, a switch tube Q8 and a diode D6; The first end of the switch tube Q7 is connected to the energy storage module, and the first end of the switch tube Q7 is also connected to the control end of the switch tube Q7 through the resistor R9 and the resistor R11. The resistor R9 is also connected to the ground end through the resistor R10, and the resistor R11 is also connected to the DC charging pile. The second end of the switch tube Q7 is connected to the anode of the diode D6 through the resistor R12, and the cathode of the diode D6 is connected to the second output unit. The cathode of the diode D6 is also connected to the control end of the switch tube Q8 through the resistor R13, and the control end of the switch tube Q8 is also connected to the ground end through the resistor R14. The first end of the switch tube Q8 is connected to the first output unit, and the second end of the switch tube Q8 is used for grounding.

9. The power-off unlocking control circuit according to any one of claims 1 to 8, characterized in that: The power-off unlocking control circuit also includes an anti-backflow module; The anti-backflow module is connected to the DC charging pile and the energy storage module respectively; The anti-backflow module is used to prevent the current in the energy storage module from flowing into the DC charging pile when the DC charging pile loses power; Wherein, the anti-backflow module is a diode D2; The anode of the diode D2 is connected to the DC charging pile, and the cathode of the diode D2 is connected to the voltage output module and the energy storage module respectively.

10. A charging device, characterized in that: The charging device comprises: DC charging pile; Controller; Electronic locks; and A power-off unlocking control circuit as described in any one of claims 1 to 9.

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