CN219458196U - Charging gun and electronic lock unlocking circuit - Google Patents

Charging gun and electronic lock unlocking circuit Download PDF

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Publication number
CN219458196U
CN219458196U CN202320676197.5U CN202320676197U CN219458196U CN 219458196 U CN219458196 U CN 219458196U CN 202320676197 U CN202320676197 U CN 202320676197U CN 219458196 U CN219458196 U CN 219458196U
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CN
China
Prior art keywords
electronic lock
charging gun
power supply
unlocking circuit
normally open
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Active
Application number
CN202320676197.5U
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Chinese (zh)
Inventor
吴倪聪
贾永伟
梁缘
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Hangzhou Nengqimei Technology Co ltd
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Hangzhou Nengqimei Technology Co ltd
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Priority to CN202320676197.5U priority Critical patent/CN219458196U/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The utility model provides a charging gun and an electronic lock unlocking circuit, wherein the electronic lock comprises a direct current motor for generating locking and unlocking driving force, and the electronic lock unlocking circuit comprises: a controller; the driving power supply module is controlled by the controller to generate direct-current voltage for locking the electronic lock; the energy storage module is used for being connected with the driving power supply module and the direct current motor in series to form a locking loop; the monostable relay comprises an electromagnetic coil, and a normally open contact and a normally closed contact controlled by the electromagnetic coil, wherein the electromagnetic coil is connected in parallel with two ends of the driving power supply module, and the normally open contact is connected in series in the locking loop; and the normally closed contact is used for being connected with the energy storage module and the direct current motor in series to form an unlocking loop. The charging gun and the electronic lock unlocking circuit can automatically unlock when the charging pile is accidentally powered off, and user experience is improved.

Description

Charging gun and electronic lock unlocking circuit
Technical Field
The utility model relates to the technical field of electric automobiles, in particular to an electronic lock unlocking circuit of a charging gun.
Background
Conventional fuel-powered vehicles rely on petroleum, a non-renewable fossil energy source, and can cause serious environmental pollution, and are being gradually replaced by more environmentally friendly new energy vehicles. Most of the new energy automobiles are electric automobiles, and owners of the electric automobiles generally have urgent demands for quick charging. In order to increase the charging speed, the cable current of the charging gun is generally increased. In order to prevent the charging gun from falling off in the process of high-current charging, accidental electric shock is caused. The national standard specifies that the power supply interface and the vehicle interface should have a locking function when the ac charging current is greater than 16A. The electronic lock is a lock mechanism for ensuring that the charging gun in the charged state is not pulled out.
When charging is performed by adopting the direct current charging pile, the condition that the power grid is suddenly cut off in the charging process may occur. At this time, the control main board is powered down, and an unlocking instruction cannot be sent out to unlock the electronic lock. When the car owner cannot tolerate waiting for a maintenance personnel to unlock manually for a long time, violent unlocking can be selected, so that the charging gun is damaged.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present utility model aims to provide a charging gun and an electronic lock unlocking circuit, which can automatically unlock the charging gun under the condition of unexpected power failure of a charging pile, avoid the locking of the charging gun, and improve the user experience.
To achieve the above and other related objects, the present utility model provides an electronic lock unlocking circuit of a charging gun, the electronic lock including a direct current motor for generating locking and unlocking driving forces, the electronic lock unlocking circuit including:
a controller;
the driving power supply module is controlled by the controller to generate direct-current voltage for locking the electronic lock;
the energy storage module is used for being connected with the driving power supply module and the direct current motor in series to form a locking loop;
the monostable relay comprises an electromagnetic coil, and a normally open contact and a normally closed contact controlled by the electromagnetic coil, wherein the electromagnetic coil is connected in parallel with two ends of the driving power supply module, and the normally open contact is connected in series in the locking loop; and the normally closed contact is used for being connected with the energy storage module and the direct current motor in series to form an unlocking loop.
Preferably, the driving power supply module is a relay driving chip, the relay driving chip comprises a power supply pin, two logic input pins and two driving output pins, the power supply pin is used for being connected with a power grid through an alternating current-direct current converter, the two logic input pins are connected with the controller, and the two driving output pins are used for generating the direct current voltage.
Preferably, the driving power module further comprises a voltage stabilizing capacitor connected between the power pin and the ground line.
Preferably, the energy storage module includes a first capacitor and a second capacitor connected in parallel with each other.
Preferably, the first capacitor and the second capacitor are electrolytic capacitors.
Preferably, the normally open contact includes a first normally open contact and a second normally open contact, the first normally open contact is connected between the positive pole of the driving power module and the energy storage module, and the second normally open contact is used for being connected between the negative pole of the driving power module and the direct current motor.
Preferably, the electronic lock unlocking circuit further comprises a first conduction branch connected in parallel to two ends of the second normally open contact.
Preferably, the normally-closed contact includes a first normally-closed contact and a second normally-closed contact connected in series with each other.
Preferably, the electronic lock unlocking circuit further comprises a charging state prompt module connected in parallel with two ends of the electromagnetic coil, and the charging state prompt module comprises a light emitting diode and a second current limiting resistor which are connected in series.
To achieve the above and other related objects, the present utility model also provides a charging gun, which includes an electronic lock and the electronic lock unlocking circuit.
As described above, the charging gun and the electronic lock unlocking circuit can automatically unlock when the power grid fails accidentally, and improve user experience.
Drawings
Fig. 1 is a block diagram of an electronic lock unlocking circuit according to an embodiment of the utility model.
Fig. 2 is a specific circuit diagram of the driving power module in fig. 1.
Fig. 3 is a specific circuit diagram of an electronic lock unlocking circuit according to an embodiment of the utility model.
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.
As shown in fig. 1, the utility model provides an electronic lock unlocking circuit of a charging gun, wherein the electronic lock comprises a direct current motor for generating locking and unlocking driving force, and the electronic lock unlocking circuit of the charging gun comprises a controller, a driving power supply module, an energy storage module and a monostable relay.
The controller is used for sending a control signal for locking the electronic lock to the driving power supply module. The driving power supply module is controlled by the controller to generate direct current voltage for locking the electronic lock. The energy storage module is used for being connected with the driving power supply module and the direct current motor in series to form a locking loop. The monostable relay comprises an electromagnetic coil K, and a normally open contact K1 and a normally closed contact K2 controlled by the electromagnetic coil K, wherein the electromagnetic coil is connected in parallel with two ends of the driving power supply module, and the normally open contact is connected in series in the locking loop; the normally closed contact is used for being connected with the energy storage module and the direct current motor in series to form an unlocking loop.
When the energy storage module is used, the negative wiring end LOCK-of the direct current motor is connected to the negative electrode output end of the driving power supply module, the negative wiring end LOCK-of the direct current motor is connected to the normally closed contact K2, and the positive wiring end LOCK+ of the direct current motor is connected to the energy storage module.
During normal charging, the controller sends a control signal for locking the electronic lock, for example, a high level of 3.3V to the driving power supply module. The driving power module generates a direct-current voltage of 12V according to the control signal. The direct-current voltage firstly enables an electromagnetic coil of the monostable relay to generate an induction magnetic field, the induction magnetic field drives the normally open contact K1 to be closed, and the induction magnetic field drives the normally closed contact K2 to be opened, namely the locking loop is switched on. After the locking loop is conducted, the direct-current voltage charges the energy storage module and simultaneously generates current flowing through the winding of the direct-current motor. The winding current drives the direct current motor to rotate positively, so that the electronic lock enters a locking state. After the electronic lock is locked, the energy storage module stores a proper amount of electric energy.
After the power grid is accidentally powered off, the controller cannot send an unlocking signal to the driving power supply module, and the driving power supply module loses power. The monostable relay returns to the initial state due to the power failure of the electromagnetic coil, namely the normally open contact K1 is opened, and the normally closed contact K2 is closed. The locking loop is disconnected, and the unlocking loop is connected. The energy storage module can only discharge through the unlocking loop, and discharge current flows from the negative terminal of the direct current motor to the positive terminal of the direct current motor, so that the direct current motor is reversed, and automatic unlocking action is completed.
As shown in fig. 2, in the present embodiment, the driving power module is a relay driving chip U1, and the relay driving chip U1 includes a power pin VIN, two logic input pins a and B, and two driving output pins OA and OB. The power supply pin VIN is used to connect to the grid through an ac-dc converter, for example, a buck dc converter to convert 220V ac to 12V dc. Two logic input pins a and B are connected to the controller and two drive output pins OA and OB are used to generate a dc voltage.
The input-output characteristics of the relay driving chip U1 are as follows: when the A pin and the B pin are both input with digital low level, the OA pin and the OB pin are both in a high resistance state; when the a pin inputs a digital low level and the B pin inputs a digital high level, the OA pin outputs a low level and the OB pin outputs a chip power supply voltage. When the A pin inputs a digital high level and the B pin inputs a digital low level, the OA pin outputs a chip power supply voltage and the OB pin outputs a low level; when both pins a and B input digital high, both the OA and OB pins are also in high impedance state. Therefore, the B pin of the relay driving chip U1 is grounded, and when the LOCK signal lock_ctl of 3.3V is input to the a pin, the output voltage u1_oa of the OA pin is the power supply voltage 12V. The output voltage U1_OB of the OB pin is 0V. The OA pin of the relay driving chip U1 is connected with the positive electrode of the coil of the monostable relay, the OB pin of the relay driving chip U1 is connected with the negative electrode of the coil of the monostable relay, and 12V voltage is loaded to the relay coil, so that the monostable relay is converted from the release state shown in fig. 3 to the attraction state. In the attraction state, the normally open contact K1 of the monostable relay is in a closed state.
As shown in fig. 2, in the present embodiment, the driving power module further includes a voltage stabilizing capacitor C3 connected between the power pin and the ground, so as to reduce the malfunction of the monostable relay.
As shown in fig. 3, in the present embodiment, the energy storage module includes a first capacitor C1 and a second capacitor C2 connected in parallel, so as to ensure that the electronic lock can reliably perform the unlocking action in the power-off state.
In this embodiment, the normally open contacts include a first normally open contact K11 and a second normally open contact K12, the first normally open contact K11 is connected between the positive electrode of the driving power module and the energy storage module, and the second normally open contact K12 is used for being connected between the negative electrode of the driving power module and the dc motor. By separating the direct current motor from the driving power supply module through the second normally open contact K12, the influence of surge current in the relay switching process on the driving power supply module can be reduced.
In order to adapt to the three-wire electronic lock, in this embodiment, the unlocking circuit of the electronic lock further includes a first conduction branch connected in parallel to two ends of the second normally open contact K12. The first conducting branch may be a wire, or may have a small resistance R1 or a switch.
In the present embodiment, the normally-closed contacts include a first normally-closed contact K21 and a second normally-closed contact K22 that are connected in series with each other.
As shown in fig. 3, the electronic lock unlocking circuit further includes a charge state prompting module connected in parallel to two ends of the electromagnetic coil, and the charge state prompting module includes a light emitting diode D1 and a second current limiting resistor R2 connected in series with each other. When the monostable relay is powered on, the light emitting diode D1 emits light to remind the vehicle owner that the electronic lock is being locked.
The utility model also provides a charging gun which comprises the electronic lock and the unlocking circuit of the electronic lock in any embodiment.
In summary, the energy storage module and the monostable relay are added in the electronic lock, so that the energy storage module stores electric energy in the locking process, and when the power grid suddenly fails, the energy storage module releases reverse current to the direct current motor, thereby realizing automatic unlocking, and having higher industrial utilization value.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description. When technical features of different embodiments are embodied in the same drawing, the drawing can be regarded as a combination of the embodiments concerned also being disclosed at the same time.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. An electronic lock unlocking circuit of a charging gun, the electronic lock including a direct current motor for generating locking and unlocking driving forces, the electronic lock unlocking circuit comprising:
a controller;
the driving power supply module is controlled by the controller to generate direct-current voltage for locking the electronic lock;
the energy storage module is used for being connected with the driving power supply module and the direct current motor in series to form a locking loop;
the monostable relay comprises an electromagnetic coil, and a normally open contact and a normally closed contact controlled by the electromagnetic coil, wherein the electromagnetic coil is connected in parallel with two ends of the driving power supply module, and the normally open contact is connected in series in the locking loop; and the normally closed contact is used for being connected with the energy storage module and the direct current motor in series to form an unlocking loop.
2. The electronic lock unlocking circuit of the charging gun according to claim 1, wherein the driving power supply module is a relay driving chip, the relay driving chip comprises a power supply pin, two logic input pins and two driving output pins, the power supply pin is used for being connected with a power grid through an alternating current-direct current converter, the two logic input pins are connected with the controller, and the two driving output pins are used for generating the direct current voltage.
3. The electronic lock unlocking circuit of a charging gun according to claim 2, wherein the driving power supply module further comprises a voltage stabilizing capacitor connected between the power supply pin and a ground line.
4. The electronic lock unlocking circuit of a charging gun according to claim 1, wherein the energy storage module comprises a first capacitor and a second capacitor connected in parallel with each other.
5. The electronic lock unlocking circuit of a charging gun according to claim 4, wherein the first capacitor and the second capacitor are electrolytic capacitors.
6. The electronic lock unlocking circuit of a charging gun according to claim 1, wherein the normally open contact comprises a first normally open contact and a second normally open contact, the first normally open contact is connected between the positive pole of the driving power module and the energy storage module, and the second normally open contact is used for being connected between the negative pole of the driving power module and the direct current motor.
7. The electronic lock unlocking circuit of a charging gun of claim 6, further comprising a first conductive branch connected in parallel across the second normally open contact.
8. The electronic lock unlocking circuit of a charging gun according to claim 1, wherein the normally-closed contact includes a first normally-closed contact and a second normally-closed contact connected in series with each other.
9. The electronic lock unlocking circuit of the charging gun according to claim 8, further comprising a charging state prompting module connected in parallel to two ends of the electromagnetic coil, wherein the charging state prompting module comprises a light emitting diode and a second current limiting resistor connected in series with each other.
10. A charging gun comprising an electronic lock and the electronic lock unlocking circuit according to any one of claims 1 to 9.
CN202320676197.5U 2023-03-28 2023-03-28 Charging gun and electronic lock unlocking circuit Active CN219458196U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320676197.5U CN219458196U (en) 2023-03-28 2023-03-28 Charging gun and electronic lock unlocking circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320676197.5U CN219458196U (en) 2023-03-28 2023-03-28 Charging gun and electronic lock unlocking circuit

Publications (1)

Publication Number Publication Date
CN219458196U true CN219458196U (en) 2023-08-01

Family

ID=87413252

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202320676197.5U Active CN219458196U (en) 2023-03-28 2023-03-28 Charging gun and electronic lock unlocking circuit

Country Status (1)

Country Link
CN (1) CN219458196U (en)

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