Charging gun electronic lock control device and charging gun

Abstract

The application relates to a charging gun electronic lock control device and a charging gun, which comprise a weak-current driving circuit, a power-off unlocking circuit and an electronic lock driving circuit. The electronic lock driving circuit and the power-off unlocking circuit are connected with the weak-current driving circuit, and the electronic lock driving circuit is used for being connected with an electronic lock. The power-off unlocking circuit is used for controlling the weak-current driving circuit to be disconnected when power-off is detected. The electronic lock driving circuit outputs an unlocking signal to the electronic lock when the weak-current driving circuit is disconnected, and the unlocking signal is used for controlling the electronic lock to be unlocked. The charging gun electronic lock control device and the charging gun realize automatic unlocking of the charging gun under the hardware control by designing the weak-current driving circuit, the power-off unlocking circuit and the electronic lock driving circuit, effectively solve the unlocking difficulty problem of the charging gun under the power-off condition, and improve the safety in the charging process.

Description

Technical Field

[0001] This application relates to the field of new energy charging and swapping technology, and in particular to an electronic lock control device for a charging gun and a charging gun. Background Technology

[0002] With the development of new energy technologies, the use of new energy vehicles is becoming increasingly common. These vehicles typically charge by connecting to charging stations via a charging gun.

[0003] 0. During charging, if the charging station experiences an abnormal power outage and the electronic lock on the charging gun is not unlocked at the time of the power outage, the charging gun and the vehicle will remain connected, and the vehicle will remain locked. In this case, the vehicle will require mechanical or software unlocking by a professional, making the unlocking process for the charging gun after an abnormal power outage quite complicated.

[0004] Currently, most charging piles on the market use microcontroller-based embedded software for the control circuit of the charging gun, employing redundant design for the electronic lock driver and patrol unlocking. However, when the embedded software malfunctions, such as power outages, program freezes, or thread blockages, the electronic lock unlocking time becomes longer, or it may even fail to unlock at all, failing to effectively solve the problem of unlocking the charging gun when power is off. Summary of the Invention

[0005] Therefore, it is necessary to provide a charging gun electronic lock control device and a charging gun to address the above problems.

[0006] In a first aspect, a charging gun electronic lock control device is provided, including a low-voltage drive circuit, a power-off unlocking circuit and an electronic lock drive circuit. The electronic lock drive circuit and the power-off unlocking circuit are both connected to the low-voltage drive circuit, and the electronic lock drive circuit is used to connect to the electronic lock.

[0007] The power-off unlocking circuit is used to control the power-off unlocking circuit to conduct and the weak current drive circuit to disconnect when a power failure is detected; when the weak current drive circuit is disconnected, the electronic lock drive circuit outputs an unlocking signal to the electronic lock, and the unlocking signal is used to control the electronic lock to unlock.

[0008] In one embodiment, the low-voltage drive circuit is used to receive the electronic lock control signal, which is used to control the low-voltage drive circuit to close or open; when the low-voltage drive circuit is closed, the electronic lock drive circuit outputs a locking signal to the electronic lock, which is used to control the electronic lock to lock.

[0009] In one embodiment, the low-voltage drive circuit includes a drive switch transistor, an electronic lock control signal port, a first power supply port, and a second power supply port. The electronic lock control signal port is connected to the control terminal of the drive switch transistor. The first terminal of the drive switch transistor is connected to the first power supply port, and the second terminal of the drive switch transistor is connected to the second power supply port. Both the control terminal and the second terminal of the drive switch transistor are connected to a power-off unlocking circuit. The first terminal of the drive switch transistor is connected to the electronic lock drive circuit.

[0010] In one embodiment, the low-voltage drive circuit further includes a current-limiting resistor and a first diode. The electronic lock control signal port is connected to the control terminal of the drive switch transistor through the current-limiting resistor. The first terminal of the drive switch transistor is connected to the anode of the first diode, and the cathode of the first diode is connected to the first power supply port.

[0011] In one embodiment, the power-down unlocking circuit includes a power-down unlocking relay, the coil of which is connected to a power source, and the first and second contacts of the power-down unlocking relay are both connected to a low-voltage drive circuit.

[0012] In one embodiment, the power-down unlocking circuit further includes a second diode, the anode of which is connected to the low-voltage drive circuit, and the cathode of which is connected to the first contact of the power-down unlocking relay.

[0013] In one embodiment, the electronic lock drive circuit includes a drive relay, the coil of which is connected to a low-voltage drive circuit, and the contacts of the drive relay are used to connect to a power source and to the electronic lock.

[0014] In one embodiment, the electronic lock drive circuit further includes a third diode, which drives the relay contacts to access a power source via the third diode.

[0015] In one embodiment, the electronic lock drive circuit further includes a capacitor that drives the relay contacts to connect to the electronic lock via the capacitor.

[0016] Secondly, a charging gun is provided, including a charging gun body, an electronic lock, and a charging gun electronic lock control device as described in any of the above embodiments.

[0017] The aforementioned charging gun electronic lock control device and charging gun include a low-voltage drive circuit, a power-off unlocking circuit, and an electronic lock drive circuit. Both the electronic lock drive circuit and the power-off unlocking circuit are connected to the low-voltage drive circuit, which is used to connect to the electronic lock. The power-off unlocking circuit is used to disconnect the low-voltage drive circuit when a power failure is detected. When the low-voltage drive circuit is disconnected, the electronic lock drive circuit outputs an unlocking signal to the electronic lock, which is used to control the electronic lock to unlock. This charging gun electronic lock control device and charging gun, through the design of the low-voltage drive circuit, power-off unlocking circuit, and electronic lock drive circuit, achieve automatic unlocking of the charging gun under hardware control when power is lost, effectively solving the problem of difficult unlocking of the charging gun in the event of a power failure and improving safety during the charging process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the electronic lock control device for a charging gun in one embodiment;

[0019] Figure 2 This is a schematic diagram of the electronic lock control device for the charging gun in another embodiment. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0021] In one embodiment, such as Figure 1 As shown, the charging gun electronic lock control device includes a low-voltage drive circuit 110, a power-off unlocking circuit 130, and an electronic lock drive circuit 120. Both the electronic lock drive circuit 120 and the power-off unlocking circuit 130 are connected to the low-voltage drive circuit 110, and the electronic lock drive circuit 120 is used to connect to the electronic lock.

[0022] The low-voltage drive circuit 110 can control the operating state of the electronic lock drive circuit 120. Specifically...

[0023] Yes, the low-voltage drive circuit 110 can be connected to a power signal. The power signal can be transmitted to the electronic lock drive circuit 120 via the low-voltage drive circuit 1105. Optionally, when the low-voltage drive circuit 110 is closed, the power signal can...

[0024] The power signal is transmitted to the electronic lock drive circuit 120, which then operates and outputs a locking signal to the electronic lock. The locking signal is used to control the electronic lock to lock. When the low-voltage drive circuit 110 is disconnected, the power signal cannot be transmitted to the electronic lock drive circuit 120, and the electronic lock drive circuit 120 does not operate. At this time, the electronic lock drive circuit 120 outputs an unlocking signal to the electronic lock. The unlocking signal is used to control the electronic lock to unlock.

[0025] The power-off unlocking circuit 130 is used to control the low-voltage drive circuit 110 to disconnect when a power failure is detected.

[0026] In this circuit, the power-off unlocking circuit 130 can be connected to the charging pile's power signal at both ends. The charging pile's power signal is typically an AC power signal. When the charging pile experiences an abnormal power outage, the power signal connected to the power-off unlocking circuit 130 is disconnected, and the power-off unlocking circuit 130 ceases to function. At this time, the power-off unlocking circuit 130 can control low-voltage power.

[0027] Drive circuit 110 is disconnected. When the low-voltage drive circuit 110 is disconnected, the electronic lock drive circuit 120 can output an unlocking signal to the electronic lock to control the electronic lock to unlock.

[0028] In this embodiment, the charging gun electronic lock control device includes a low-voltage drive circuit 110, a power-off unlocking circuit 130, and an electronic lock drive circuit 120. Both the electronic lock drive circuit 120 and the power-off unlocking circuit 130 are connected to the low-voltage drive circuit 110, and the electronic lock drive circuit 120 is used to connect to the electronic lock. The power-off unlocking circuit...

[0029] 130 is used to control the low-voltage drive circuit 110 to disconnect when a power failure is detected. When the low-voltage drive circuit 110 is disconnected, the electronic lock drive circuit 120 outputs an unlocking signal to the electronic lock; this unlocking signal is used to control the electronic lock.

[0030] Unlocking. This charging gun electronic lock control device, through the design of a low-voltage drive circuit 110, a power-off unlocking circuit 130, and an electronic lock drive circuit 120, realizes automatic unlocking of the charging gun under hardware control when power is off, effectively solving the problem of difficulty in unlocking the charging gun when power is off and improving safety during the charging process.

[0031] In one embodiment, the low-voltage drive circuit 110 is used to receive the electronic lock control signal, which is used to control the low-voltage drive circuit 110 to close or open; when the low-voltage drive circuit 110 is closed, the electronic lock drive circuit 120 outputs a locking signal to the electronic lock, which is used to control the electronic lock to lock.

[0032] Specifically, when the power-off unlocking circuit 130 is connected to a charging pile power signal, if the power-off unlocking circuit 130 does not detect a power outage (i.e., the charging pile power signal is input normally), the electronic lock control signal can control the low-voltage drive circuit 110 to close or open. For example, the electronic lock control signal can be a high-level or low-level signal. When the electronic lock control signal is a high-level signal, it can control the low-voltage drive circuit 110 to close, at which time the electronic lock drive circuit 120 can output a locking signal. When the electronic lock control signal is a low-level signal, it can control the low-voltage drive circuit 110 to open, at which time the electronic lock drive circuit 120 can output an unlocking signal.

[0033] Specifically, the low-voltage drive circuit 110 may include a switching transistor, the control terminal of which can be connected to an electronic lock control signal. The electronic lock control signal can change the potential of the switching transistor's control terminal by setting different voltage values, thereby turning the switching transistor on or off, and thus controlling the opening or closing of the low-voltage drive circuit 110. Furthermore, when the switching transistor is closed, the electronic lock drive circuit 120 can output a locking signal to the electronic lock, which can control the electronic lock to lock. When the switching transistor is open, the electronic lock drive circuit 120 can output an unlocking signal to the electronic lock, which can control the electronic lock to unlock.

[0034] In this embodiment, the low-voltage drive circuit 110 is used to receive the electronic lock control signal, which controls the closing or opening of the low-voltage drive circuit 110. When the low-voltage drive circuit 110 is closed, the electronic lock drive circuit 120 outputs a locking signal to the electronic lock, which controls the electronic lock to lock. The electronic lock control signal can control the closing or opening of the low-voltage drive circuit 110, thereby enabling the electronic lock drive circuit 120 to output a locking or unlocking signal, ensuring that the charging gun electronic lock functions normally without abnormal power loss.

[0035] In one embodiment, such as Figure 2 As shown, the low-voltage drive circuit 110 includes a drive switch 111, an electronic lock control signal port 112, a first power port 113, and a second power port 114. The electronic lock control signal port 112 can be connected to the control terminal of the drive switch 111, the first terminal of the drive switch 111 can be connected to the first power port 113, and the second terminal of the drive switch 111 can be connected to the second power port 114. Both the control terminal and the second terminal of the drive switch 111 are connected to the power-off unlocking circuit 130, and the first terminal of the drive switch 111 is connected to the electronic lock drive circuit 120.

[0036] The first power port 113 can be used to receive a positive voltage input signal, the second power port 114 can be used to receive a negative voltage input signal, and the electronic lock control signal port 112 can be used to receive an electronic lock control signal.

[0037] When the charging pile is powered normally, the electronic lock control signal can control the drive switch 111 to turn on or off. The first power port 113 and the second power port 114 can be connected to the two ends of the electronic lock drive circuit 120. When the drive switch 111 is on, the electronic lock drive circuit 120 operates and can output a locking signal. When the drive switch 111 is off, the electronic lock drive circuit 120 does not operate and can output an unlocking signal.

[0038] When the power-down unlocking circuit 130 detects an abnormal power failure, it can control the low-voltage drive circuit 110 to disconnect. Specifically, the power-down unlocking circuit 130 can control the drive switch 111 to not conduct. When the drive switch 111 is not conducting, there is no current transmission in the electronic lock drive circuit 120, and the electronic lock drive circuit 120 does not work. At this time, the electronic lock drive circuit 120 outputs an unlocking signal, which is used to control the electronic lock to unlock, thereby realizing the power-down unlocking function of the electronic lock.

[0039] In this embodiment, the low-voltage drive circuit 110 includes a drive switch 111, an electronic lock control signal port 112, a first power port 113, and a second power port 114. The electronic lock control signal port 112 can be connected to the control terminal of the drive switch 111, the first terminal of the drive switch 111 can be connected to the first power port 113, and the second terminal of the drive switch 111 can be connected to the second power port 114. Both the control terminal and the second terminal of the drive switch 111 are connected to the power-down unlocking circuit 130, and the first terminal of the drive switch 111 is connected to the electronic lock drive circuit 120. When an abnormal power failure occurs, the power-down unlocking circuit 130 can control the drive switch 111 in the low-voltage drive circuit 110 to de-conduct, thereby disconnecting the electronic lock drive circuit 120, outputting an unlocking signal, controlling the electronic lock to unlock, and realizing the power-down unlocking function of the electronic lock.

[0040] In one embodiment, such as Figure 2 As shown, the low-voltage drive circuit 110 also includes a current-limiting resistor R1 and a first diode D2. The electronic lock control signal port 112 is connected to the control terminal of the drive switch transistor 111 through the current-limiting resistor R1. The first terminal of the drive switch transistor 111 is connected to the anode of the first diode D2, and the cathode of the first diode D2 is connected to the first power supply port 113.

[0041] When the drive switch 111 is turned on, the current increases rapidly. Connecting a current-limiting resistor R1 to the control terminal of the drive switch 111 can prevent the drive switch 111 from breaking down due to the rapid increase in current, and also reduce the power consumption of the drive switch 111. Furthermore, when an electronic lock control signal is connected to the electronic lock control signal port 112, the voltage of the electronic lock control signal can be applied to the control terminal of the drive switch 111 through the current-limiting resistor R1, forming a bias voltage at the control terminal of the drive switch 111 and accelerating the turn-on of the drive switch 111. Specifically, the drive switch 111 can be a transistor.

[0042] When the electronic lock drive circuit 120 includes a relay, a first diode D2 can be connected in parallel across the relay coil. Specifically, the first end of the relay coil can be connected to the anode of the first diode D2, and the second end of the relay coil can be connected to the cathode of the first diode D2. When the relay coil is suddenly de-energized, an induced current will be generated in the coil under the action of the induced electromotive force, with the current direction from the second end of the coil to the first end. If the induced current is transmitted to the drive switch 111, it may damage the drive switch 111. However, since the first diode D2 is connected in parallel across the coil, the first diode D2 and the coil can form a closed loop, and the current direction is exactly forward-conducting with the first diode D2. Therefore, the induced current can be released, reducing damage to the drive switch 111.

[0043] In this embodiment, the low-voltage drive circuit 110 also includes a current-limiting resistor R1 and a first diode D2, which can ensure the normal operation of the low-voltage drive circuit 110 and reduce damage to circuit components.

[0044] In one embodiment, such as Figure 2 As shown, the power-down unlocking circuit 130 includes a power-down unlocking relay 131. The coil of the power-down unlocking relay 131 is used to connect to a power source. The first and second contacts of the power-down unlocking relay 131 are both connected to the low-voltage drive circuit 110.

[0045] The coil of the power-off unlock relay 131 can be used to connect to the AC power supply of the charging pile. Specifically, the first end of the coil can be connected to the live wire, and the second end of the coil can be connected to the neutral wire. The power-off unlock relay 131 can be an AC relay.

[0046] When the low-voltage drive circuit 110 includes a drive switch 111, an electronic lock control signal port 112, a first power supply port 113, and a second power supply port 114, and the electronic lock control signal port 112 is connected to the electronic lock control signal, the first power supply port 113 is connected to the positive voltage input signal, and the second power supply port 114 is connected to the negative voltage input signal, the first contact of the power-off unlocking relay 131 can be connected to the control terminal of the drive switch 111, and the second contact of the power-off unlocking relay 131 can be connected to the second power supply port 114.

[0047] Specifically, when the charging pile's AC power supply is normal, the coil of the power-off unlocking relay 131 operates normally, and the first and second contacts of the power-off unlocking relay 131 are disconnected. At this time, the drive switch 111 in the low-voltage drive circuit 110 can be turned on or off under the control of the electronic lock control signal. When the drive switch 111 is on, the electronic lock drive circuit 120 operates and can output a locking signal to the electronic lock to control the electronic lock to lock. When the drive switch 111 is off, the electronic lock drive circuit 120 does not operate and can output an unlocking signal to the electronic lock to control the electronic lock to unlock.

[0048] When the AC power supply to the charging pile experiences an abnormal power outage, the coil of the power-off unlocking relay 131 does not operate. At this time, the first and second contacts of the power-off unlocking relay 131 close, the electronic lock control signal fails, and the control terminal of the drive switch 111 is clamped to the negative terminal, preventing the drive switch 111 from conducting. When the drive switch 111 is not conducting, the electronic lock drive circuit 120 can output an unlocking signal to the electronic lock to control the unlocking of the electronic lock.

[0049] In this embodiment, the power-off unlocking circuit 130 includes a power-off unlocking relay 131. The coil of the power-off unlocking relay 131 is used to connect to the power supply, and both the first and second contacts of the power-off unlocking relay 131 are connected to the low-voltage drive circuit 110. The power-off unlocking relay 131 can detect whether the power supply is lost, and when an abnormal power outage occurs, it controls the conduction between the first and second contacts to disconnect the low-voltage drive circuit 110, thereby causing the electronic lock drive circuit 120 to output an unlocking signal, realizing the function of power-off unlocking of the electronic lock.

[0050] In one embodiment, such as Figure 2 As shown, the power-down unlocking circuit 130 also includes a second diode D1. The anode of the second diode D1 is connected to the low-voltage drive circuit 110, and the cathode of the second diode D1 is connected to the first contact of the power-down unlocking relay 131.

[0051] Specifically, the second diode D1 restricts the current flow from the low-voltage drive circuit 110 to the first contact of the power-off unlocking relay 131. When the low-voltage drive circuit 110 includes a drive switch 111, the anode of the second diode D1 can be connected to the control terminal of the drive switch 111, and the cathode of the second diode D1 can be connected to the second terminal of the drive switch 111 through the second contact of the power-off unlocking relay 131. The second terminal of the drive switch 111 can then be used to receive a negative voltage input signal. In this case, the second diode D1 prevents a current loop from forming between the control terminal and the second terminal of the drive switch 111, thus preventing damage to the drive switch 111.

[0052] In this embodiment, the power-down unlocking circuit 130 further includes a second diode D1. The anode of the second diode D1 is connected to the low-voltage drive circuit 110, and the cathode of the second diode D1 is connected to the first contact of the power-down unlocking relay 131. The second diode D1 can control the current direction from the low-voltage drive circuit 110 to the power-down unlocking circuit 130, thereby ensuring the normal operation of the low-voltage drive circuit 110 and the power-down unlocking circuit 130.

[0053] In one embodiment, the electronic lock drive circuit 120 includes a drive relay 121. The coil of the drive relay 121 is connected to the low-voltage drive circuit 110. The contacts of the drive relay 121 are used to connect to a power source and to the electronic lock.

[0054] The drive relay 121 may include multiple contacts, each used to receive different signals. The electronic lock may include a positive input terminal and a negative input terminal. For example, the drive relay 121 may include four contacts: a first contact, a second contact, a third contact, and a fourth contact. The first contact can be used to receive a positive drive power signal, and the second contact can be used to receive a negative drive power signal. The third contact can be connected to the positive input terminal of the electronic lock, and the fourth contact can be connected to the negative input terminal of the electronic lock.

[0055] Specifically, when the low-voltage drive circuit 110 is closed, the coil of the drive relay 121 operates. The drive relay 121 can control the closure between the first and third contacts, and between the second and fourth contacts, so that the positive input terminal of the electronic lock receives a positive drive power signal, and the negative input terminal receives a negative drive power signal, at which point the electronic lock is locked. When the low-voltage drive circuit 110 is open, the coil of the drive relay 121 does not operate. The drive relay 121 can control the opening between the first and third contacts, and between the second and fourth contacts, so that neither the positive nor negative input terminals of the electronic lock receive a power signal, at which point the electronic lock is unlocked.

[0056] In this embodiment, the electronic lock driving circuit 120 includes a driving relay 121. The coil of the relay is connected to the low-voltage driving circuit 110, and the contacts of the driving relay 121 are used to connect to a power source and to the electronic lock. The driving relay 121 can control the electronic lock driving circuit 120 to output an unlocking signal or a locking signal according to the operating state of the low-voltage driving circuit 110.

[0057] In one embodiment, the electronic lock drive circuit 120 further includes a third diode, which drives the contacts of the relay 121 to access the power supply via the third diode.

[0058] When a power signal is connected to the contacts of the drive relay 121, the power signal can be connected to the contacts of the drive relay 121 through the third diode. This limits the current flow and reduces damage to the power supply.

[0059] In this embodiment, the electronic lock drive circuit 120 also includes a third diode. The contacts of the drive relay 121 are used to access the power supply through the third diode, which can ensure the normal operation of the electronic lock drive circuit 120.

[0060] In one embodiment, the electronic lock drive circuit 120 further includes a capacitor. The contacts of the drive relay 121 are used to connect to the electronic lock via the capacitor.

[0061] When the contacts of the driving relay 121 include a first contact and a second contact, the first contact can be used to connect to the power supply, and the second contact can be used to connect to the electronic lock via a capacitor. When the first contact and the second contact are closed, the capacitor can filter the power signal and improve the quality of the power signal.

[0062] In this embodiment, the electronic lock drive circuit 120 also includes a capacitor. The contacts of the drive relay 121 are used to connect to the electronic lock via the capacitor. The capacitor can act as a filter, thereby helping to improve the signal quality transmitted to the electronic lock.

[0063] In one embodiment, a charging gun is provided, including a charging gun body, an electronic lock, and a charging gun electronic lock control device as described in any of the above embodiments.

[0064] The charging gun body has two ends that can be connected to a car and a charging station, respectively. The charging gun body can be equipped with both a mechanical lock and an electronic lock. The mechanical lock controls the physical connection between the charging gun body and the charging station, while the electronic lock controls the electrical connection. An electronic lock control device can be connected to the electronic lock and control its locking and unlocking.

[0065] For example, when the charging gun is connected to the charging station, the mechanical lock can be manually locked to fix the charging gun to the charging station. After the charging gun's electronic lock control device locks the electronic lock, the charging station can then charge the vehicle using the charging gun. Once charging is complete, the electronic lock control device can unlock the electronic lock, allowing the mechanical lock to be manually unlocked and the charging gun to be removed from the charging station. Specifically, if the charging station experiences an abnormal power outage and the vehicle is locked, the charging gun's electronic lock control device can automatically unlock the electronic lock, shortening the unlocking time. The specific control process of the charging gun's electronic lock control device in case of an abnormal power outage can be found in the above embodiments and will not be repeated here.

[0066] In this embodiment, the charging gun includes a charging gun body, an electronic lock, and a charging gun electronic lock control device. By using the charging gun electronic lock control device to control the unlocking and locking of the electronic lock, the unlocking time of the electronic lock can be reduced in the event of an abnormal power outage.

[0067] To facilitate understanding, a more detailed specific embodiment is provided below.

[0068] In one embodiment, such as Figure 2 As shown, a charging gun electronic lock control device is provided, including a low-voltage drive circuit 110, a power-off unlocking circuit 130, and an electronic lock drive circuit 120. The low-voltage drive circuit 110 includes a drive switch Q1, a current-limiting resistor R1, a first diode D2, a resistor R2, a first power port 113, a second power port 114, and an electronic lock control signal port 112. The first power port 113 is used to receive a 5V positive power input signal, the second power port 114 is used to receive a 5V negative power input signal, and the electronic lock control signal port 112 is used to receive the electronic lock control signal DO+. The electronic lock control signal port 112 is connected to the control terminal of the drive switch Q1 through the current-limiting resistor R1. The first terminal of the drive switch Q1 is connected to the anode of the first diode D2, the second power port 114 is connected to the second terminal of the drive switch Q1, and the two ends of the resistor R2 are connected to the control terminal and the second terminal of the drive switch Q1, respectively.

[0069] The power-down unlocking circuit 130 includes a power-down unlocking relay KA1 and a second diode D1. The coil terminals of the power-down unlocking relay KA1 are connected to the live wire L and the neutral wire N of the power grid, respectively. The contacts of the power-down unlocking relay KA1 include a first contact and a second contact. The first contact is used to connect to the cathode of the second diode D1, and the second contact is used to connect to the second power supply port 114. The anode of the second diode D1 is connected to the control terminal of the drive switch Q1.

[0070] The electronic lock drive circuit 120 includes a drive relay KA2, a capacitor C1, and a third diode D3. The first end of the coil of the drive relay KA2 is connected to the cathode of the first diode D2, and the second end is connected to the anode of the first diode D2. The contacts of the drive relay KA2 include contacts 1, 4, 5, 8, 9, and 12. Contact 1 is used to connect to the cathode of the third diode D3, and the anode of the third diode D3 is used to receive a 12V positive power input signal. Contact 4 is used to receive a 12V negative power input signal. Contact 5 is used to connect to the inverting input terminal LOCKA of the electronic lock through capacitor C1. Contacts 8 and 9 are both used to connect to the positive input terminal LOCKB of the electronic lock. Contact 12 is used to receive a 12V positive power input signal.

[0071] The working principle of the electronic lock control device for the charging gun is as follows: When the power grid is working normally, both the live wire (L) and the neutral wire (N) have voltage input. At this time, KA1 is working normally, and the contacts of KA1 are in the open state. When the electronic lock control signal DO+ connected to the weak current drive circuit 110 is a high-level signal, Q1 is turned on, the coil of KA2 works, and a locking signal is output to the electronic lock to control the electronic lock to lock. When the electronic lock control signal DO+ is a low-level signal, Q1 is turned off, the coil of KA2 does not work, and an unlocking signal is output to the electronic lock to control the electronic lock to unlock.

[0072] When an abnormal power outage occurs in the power grid, KA1 in the power-off unlocking circuit 130 does not operate. The first and second contacts of KA1 are in a closed state. At this time, regardless of whether the electronic lock control signal DO+ is a high-level signal or a low-level signal, Q1 is not conducting because its control terminal is clamped to the negative terminal by the contacts of KA1. KA2 does not operate, and an unlocking signal is output to the electronic lock to control the unlocking of the electronic lock. This realizes the power-off unlocking function of the electronic lock.

[0073] The charging gun electronic lock control device in this embodiment uses a power-off unlocking relay KA1 to detect power outages in the power grid. When an abnormal power outage occurs, it clamps the control terminal of the drive switch Q1 in the low-voltage drive circuit 110, forcing the electronic lock drive circuit 120 to output an unlocking signal and control the electronic lock to unlock. Furthermore, because hardware control is used, the unlocking time of the electronic lock is reduced, effectively solving the problem of automatic unlocking of the charging lock during power outages and improving the safety and reliability during charging.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A charging gun electronic lock control device, characterized in that, It includes a low-voltage drive circuit, a power-off unlocking circuit, and an electronic lock drive circuit. The electronic lock drive circuit and the power-off unlocking circuit are both connected to the low-voltage drive circuit. The electronic lock drive circuit is used to connect to the electronic lock. The power-off unlocking circuit is used to control the weak current drive circuit to disconnect when a power failure is detected. When the weak current drive circuit is disconnected, the electronic lock drive circuit outputs an unlocking signal to the electronic lock, and the unlocking signal is used to control the electronic lock to unlock. The power-off unlocking circuit includes a power-off unlocking relay, the coil of which is used to connect to the AC power supply of the charging pile, and the first and second contacts of the power-off unlocking relay are both connected to the low-voltage drive circuit; wherein, the power-off unlocking relay is an AC relay. The low-voltage drive circuit includes a drive switch transistor, the control terminal of which is connected to the first contact of the power-off unlocking relay. When a power failure is detected, the power-off unlocking relay closes the connection between the first contact and the second contact, clamps the control terminal of the drive switch transistor to the negative terminal, and the drive switch transistor is not conducting. When the drive switch transistor is not conducting, the electronic lock drive circuit outputs the unlocking signal to the electronic lock.

2. The charging gun electronic lock control device according to claim 1, characterized in that, The low-voltage drive circuit is used to receive the electronic lock control signal, which is used to control the low-voltage drive circuit to close or open. When the low-voltage drive circuit is closed, the electronic lock drive circuit outputs a locking signal to the electronic lock, which is used to control the electronic lock to lock.

3. The charging gun electronic lock control device according to claim 1, characterized in that, The low-voltage drive circuit includes an electronic lock control signal port, a first power supply port, and a second power supply port. The electronic lock control signal port is connected to the control terminal of the drive switch transistor. The first terminal of the drive switch transistor is connected to the first power supply port, and the second terminal of the drive switch transistor is connected to the second power supply port. Both the control terminal and the second terminal of the drive switch transistor are connected to the power-off unlocking circuit. The first terminal of the drive switch transistor is connected to the electronic lock drive circuit.

4. The charging gun electronic lock control device according to claim 3, characterized in that, The low-voltage drive circuit also includes a current-limiting resistor and a first diode. The electronic lock control signal port is connected to the control terminal of the drive switch transistor through the current-limiting resistor. The first terminal of the drive switch transistor is connected to the anode of the first diode, and the cathode of the first diode is connected to the first power supply port.

5. The charging gun electronic lock control device according to claim 3, characterized in that, The driving switch is a transistor.

6. The charging gun electronic lock control device according to claim 1, characterized in that, The power-off unlocking circuit also includes a second diode, the anode of which is connected to the low-voltage drive circuit, and the cathode of which is connected to the first contact of the power-off unlocking relay.

7. The charging gun electronic lock control device according to claim 1, characterized in that, The electronic lock drive circuit includes a drive relay, the coil of which is connected to the low-voltage drive circuit, and the contacts of which are used to connect to a power source and to the electronic lock.

8. The charging gun electronic lock control device according to claim 7, characterized in that, The electronic lock drive circuit also includes a third diode, and the contacts of the drive relay are used to connect to the power supply through the third diode.

9. The charging gun electronic lock control device according to claim 7, characterized in that, The electronic lock drive circuit also includes a capacitor, and the contacts of the drive relay are used to connect to the electronic lock through the capacitor.

10. A charging gun, characterized in that, It includes a charging gun body, an electronic lock, and a charging gun electronic lock control device as described in any one of claims 1-9.

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