New energy vehicle and on-board charging device thereof, electric lock control circuit and control method

Abstract

The electric lock control circuit includes a socket lock drive circuit, a cap lock drive circuit, a switch transistor, and a control unit, and the output terminal of the switch transistor is connected to the power supply input terminals of the socket lock drive circuit and the cap lock drive circuit, and when the switch transistor is in an on state, power can be supplied to the socket lock drive circuit and the cap lock drive circuit, and when the switch transistor is in an off state, power cannot be supplied to the socket lock drive circuit and the cap lock drive circuit. The control unit has a switch control terminal connected to the control receiving terminal of the switch transistor, and when it is determined that the new energy vehicle is in a non-charging state, stops outputting an on control signal to the switch transistor to turn the switch transistor into an off state. The electric lock control circuit can reduce power consumption when the on-board charging device of the new energy vehicle is in a non-charging state. A new energy vehicle and its on-board charging device and control method are further provided.

Description

[Technical Field]

[0001] This application claims priority to a Chinese patent application filed on November 30, 2021, bearing application number 2021114470286 and entitled "New energy vehicle and its on-board charging device, electric lock control circuit, and control method," the entire contents of which are incorporated herein by reference.

[0002] The present specification relates to the technical field of an on-board charging device for a new energy vehicle, and in particular to a new energy vehicle and its on-board charging device, an electric lock control circuit, and a control method. [Background technology]

[0003] As the development of new energy electric vehicle charging technology moves toward high-power DC fast charging, the new energy electric vehicle charging standard specifically stipulates that an electrical locking mechanism must be used to ensure good connection between the charging head and the on-board charging device, and thus to ensure reliable and safe charging of new energy electric vehicles. However, during the process of realizing this application, the inventors of the present application discovered that the on-board charging device of new energy vehicles consumes relatively large amounts of power even when not charging. Summary of the Invention [Problem to be solved by the invention]

[0004] The embodiments in this specification aim to provide a new energy vehicle and its on-board charging device, electric lock control circuit, and control method that can reduce power consumption when the on-board charging device of the new energy vehicle is in a non-charging state. [Means for solving the problem]

[0005] In order to achieve the above object, in one aspect, the embodiments in this specification provide an electric lock control circuit for an on-board charging device of a new energy vehicle, the electric lock control circuit comprising: an outlet lock drive circuit; a cap lock drive circuit; a switch transistor whose output terminal is connected to the power supply input terminals of the outlet lock drive circuit and the cap lock drive circuit, and which, when in an on state, can supply power to the outlet lock drive circuit and the cap lock drive circuit, and which, when in an off state, cannot supply power to the outlet lock drive circuit and the cap lock drive circuit; and a control unit, the switch control terminal of which is connected to the control receiving terminal of the switch transistor, for stopping outputting an ON control signal to the switch transistor and turning the switch transistor into an OFF state when it is determined that the new energy vehicle is in a non-charging state.

[0006] In the electric lock control circuit according to the embodiment of the present specification, the control unit further includes a first drive control terminal and a second drive control terminal, the first drive control terminal is connected to the first drive receiving terminal of the outlet lock drive circuit, and the second drive control terminal is connected to the second drive receiving terminal of the cap lock drive circuit; The control unit further outputs an ON control signal to the switch transistor to turn on the switch transistor when it determines that charging of the new energy vehicle is necessary, and outputs a drive signal to the outlet lock drive circuit and / or the cap lock drive circuit.

[0007] In the electric lock control circuit according to the embodiments of the present specification, the switch transistor includes a field effect transistor, the drain of the field effect transistor is connected to a power supply, the source of the field effect transistor is connected to the power supply input terminals of the outlet lock drive circuit and the cap lock drive circuit, and the gate of the field effect transistor is connected to the switch control terminal of the control unit by a voltage divider circuit.

[0008] In the electric lock control circuit according to the embodiments of this specification, the voltage divider circuit includes a first voltage divider resistor and a second voltage divider resistor, one end of the first voltage divider resistor is connected to the switch control terminal of the control unit, the other end of the first voltage divider resistor is connected to one end of the second voltage divider resistor, the other end of the second voltage divider resistor is grounded, and the connection point between the first voltage divider resistor and the second voltage divider resistor is connected to the gate of the field effect transistor.

[0009] In the electric lock control circuit according to the embodiment of the present specification, the electric lock control circuit a first output interface protection circuit disposed between the output end of the outlet lock driving circuit and the wiring terminal of the outlet lock, for releasing the induced electromotive force at the output end of the outlet lock driving circuit and filtering out interference caused by the release of static electricity at the output end; The cap lock driver further includes a second output interface protection circuit disposed between the output terminal of the cap lock driver circuit and the wiring terminal of the cap lock, for releasing the induced electromotive force at the output terminal of the cap lock driver circuit and filtering out interference caused by the release of static electricity at the output terminal.

[0010] In the electric lock control circuit according to the embodiments of this specification, the wiring terminal of the outlet lock and the wiring terminal of the cap lock share one integrated terminal, the positive output terminal and the negative output terminal of the outlet lock drive circuit are connected to the first and second terminals of the integrated terminal, respectively, and the positive output terminal and the negative output terminal of the cap lock drive circuit are connected to the third and fourth terminals of the integrated terminal, respectively.

[0011] In the electric lock control circuit according to the embodiment of the present specification, the second output interface protection circuit includes a first capacitor, a second capacitor, a first clamp diode, and a second clamp diode; one end of the first capacitor is connected to one end of the first clamp diode, the other end of the first capacitor and the other end of the first clamp diode are grounded, and a connection point between the first capacitor and the first clamp diode is connected to a negative output terminal of the capacitive touch panel drive circuit; One end of the second capacitance is connected to one end of the second clamp diode, the other end of the second capacitance and the other end of the second clamp diode are grounded, and the connection point between the second capacitance and the second clamp diode is connected to the positive output terminal of the cap lock drive circuit.

[0012] In the electric lock control circuit according to the embodiment of the present specification, the first output interface protection circuit includes a third capacitor, a fourth capacitor, a third clamp diode, and a fourth clamp diode; one end of the third capacitance is connected to one end of the third clamp diode, the other end of the third capacitance and the other end of the third clamp diode are grounded, and a connection point between the third capacitance and the third clamp diode is connected to a negative output terminal of the outlet lock drive circuit; One end of the fourth capacitance is connected to one end of the fourth clamp diode, the other end of the fourth capacitance and the other end of the fourth clamp diode are grounded, and the connection point between the fourth capacitance and the fourth clamp diode is connected to the positive output terminal of the outlet lock drive circuit.

[0013] In the electric lock control circuit according to the embodiment of the present specification, the control unit further includes a first feedback receiving end and a second feedback receiving end, the first feedback receiving end is connected to the first state feedback end of the outlet lock driving circuit, and the second feedback receiving end is connected to the second state feedback end of the cap lock driving circuit; The control unit further makes a self-protection determination based on the first self-protection status signal and / or the second self-protection status signal when receiving a first self-protection status signal fed back from the outlet lock drive circuit and / or a second self-protection status signal fed back from the cap lock drive circuit.

[0014] In the electric lock control circuit according to the embodiment of the present specification, the electric lock control circuit a first self-protection output filter circuit disposed between the first feedback receiving end and the first status feedback end, for filtering out and eliminating a false protection signal by level filtering the first self-protection status signal; The device further includes a second self-protection output filter circuit, which is provided between the second feedback receiving end and the second status feedback end and performs level filtering on the second self-protection status signal to filter out a false protection signal.

[0015] In the electric lock control circuit according to the embodiments of the present specification, the first self-protection output filter circuit includes a first pull-up resistor and a fifth capacitor, one end of the first pull-up resistor is connected to one end of the fifth capacitor, the other end of the first pull-up resistor is connected to a power supply voltage, the other end of the fifth capacitor is grounded, and the connection point between one end of the first pull-up resistor and the fifth capacitor is connected to the first state feedback terminal.

[0016] In the electric lock control circuit according to the embodiments of this specification, the second self-protection output filter circuit includes a second pull-up resistor and a sixth capacitor, one end of the second pull-up resistor is connected to one end of the sixth capacitor, the other end of the second pull-up resistor is connected to a power supply voltage, the other end of the sixth capacitor is grounded, and the connection point between one end of the second pull-up resistor and the sixth capacitor is connected to the second state feedback terminal.

[0017] In another aspect, the embodiments herein further provide an on-board charging device for a new energy vehicle, including the above electric lock control circuit.

[0018] In another aspect, the embodiments herein further provide a new energy vehicle, including the on-board charging device for a new energy vehicle.

[0019] In another aspect, the embodiments herein further provide a control method for an on-board charging device of a new energy vehicle, the control method being used in the on-board charging device of the new energy vehicle, Determining whether the new energy vehicle is in a non-charging state; When the new energy vehicle is in a non-charging state, stopping outputting the ON control signal to the switch transistor to turn the switch transistor into an OFF state.

[0020] In the control method according to the embodiments of the present specification, before determining whether the new energy vehicle is in a non-charging state, Determining whether the new energy vehicle needs to be charged; The method further includes, when the new energy vehicle needs to be charged, outputting an ON control signal to the switch transistor to turn the switch transistor into an ON state.

[0021] In the control method according to the embodiment of the present specification, after outputting an ON control signal to the switch transistor, The method further includes outputting a drive signal to the outlet lock drive circuit and / or the cap lock drive circuit.

[0022] In the control method according to the embodiment of the present specification, after outputting an ON control signal to the switch transistor, The method further includes, when receiving a first self-protection status signal fed back from the outlet lock drive circuit and / or a second self-protection status signal fed back from the cap lock drive circuit, making a self-protection determination based on the first self-protection status signal and / or the second self-protection status signal.

[0023] In the control method according to the embodiment of the present specification, making a self-protection determination based on the first self-protection status signal and / or the second self-protection status signal includes: When receiving the first self-protection state signal, stopping outputting the ON control signal to the switch transistor and outputting outlet lock failure information; When receiving the second self-protection state signal, stopping outputting the ON control signal to the switch transistor and outputting cap lock fault information; When the first self-protection status signal and the second self-protection status signal are received simultaneously, the output of the ON control signal to the switch transistor is stopped, and outlet lock fault information and cap lock fault information are output.

[0024] In another aspect, embodiments herein further provide a computer device including a memory, a processor, and a computer program stored in the memory, the computer device causing the computer program to execute instructions according to the control method when executed by the processor.

[0025] In another aspect, embodiments herein further provide a computer storage medium having stored thereon a computer program, the computer program causing execution of instructions according to the control method when executed by a processor of a computing device.

[0026] As can be seen from the technical solutions provided in the embodiments herein, in the embodiments herein, when the control unit determines that the new energy vehicle is in a non-charging state, it can stop outputting an ON control signal to the switch transistor and turn the switch transistor into an OFF state. The switch transistor then cuts off the power supply to the outlet lock drive circuit and the cap lock drive circuit, stopping the operation of the outlet lock drive circuit and the cap lock drive circuit. This reduces the power consumption caused by the control unit continuing to output ON control signals to the outlet lock drive circuit and the cap lock drive circuit even when the new energy vehicle is in a non-charging state, as well as the power consumption when the outlet lock drive circuit and the cap lock drive circuit are still in a standby state, thereby reducing the power consumption of the on-board charging device for new energy vehicles in a non-charging state.

[0027] In order to more clearly describe the technical solutions of the embodiments or prior art in this specification, the following briefly introduces the accompanying drawings necessary for describing the embodiments or prior art. Obviously, the accompanying drawings described below are only some of the embodiments described in this specification, and those skilled in the art can obtain other accompanying drawings based on these accompanying drawings without any creative efforts. [Brief explanation of the drawings]

[0028] [Figure 1] FIG. 1 is a block diagram showing an electric lock control circuit of an on-board charging device for a new energy vehicle according to some embodiments of the present specification; [Figure 2] A configuration block diagram showing an electric lock control circuit of an on-board charging device for a new energy vehicle according to some other embodiments of the present specification. [Figure 3] A configuration block diagram showing an electric lock control circuit of an on-board charging device for a new energy vehicle according to some other embodiments of the present specification. [Figure 4] FIG. 1 is a circuit diagram illustrating an electric lock control circuit of an on-board charging device for a new energy vehicle according to some embodiments of the present specification (excluding the output interface protection circuit portion); [Figure 5] FIG. 1 is a circuit diagram illustrating the output interface protection circuit of an electric lock control circuit of an on-board charging device for a new energy vehicle according to some embodiments of the present specification; [Figure 6] A flowchart illustrating a method for controlling an on-board charging device for a new energy vehicle according to some embodiments of the present specification. [Figure 7] FIG. 1 is a block diagram illustrating a computer device according to some embodiments of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0029] In order to allow those skilled in the art to better understand the technical solutions in this specification, the following will clearly and completely describe the technical solutions in the embodiments in this specification in conjunction with the accompanying drawings of the embodiments in this specification. Obviously, the embodiments described below are only some of the embodiments in this specification, and not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained without the need for those skilled in the art to exert creative efforts are all within the scope of protection of this specification.

[0030] The electric lock referred to in the embodiments of this specification generally refers to an electric lock disposed on an on-board charging device for a new energy vehicle (i.e., an on-board charging device for a new energy vehicle), and may include a socket lock and / or a cap lock. Here, the socket lock can lock and fix the charging head to the on-board charging device for a new energy vehicle when charging the new energy vehicle. This ensures that a good connection is always maintained between the charging head and the on-board charging device for a new energy vehicle even while the new energy vehicle is charging. The cap lock can protect the on-board charging device for a new energy vehicle by locking the cover plate that caps the on-board charging device for a new energy vehicle. When charging the new energy vehicle is required, the cap lock is unlocked and the cover plate is opened.

[0031] In view of the problem that conventional on-board charging devices for new energy vehicles consume relatively high power even when in a non-charging state, the embodiments in this specification provide an improved electric lock control circuit for an on-board charging device for new energy vehicles, where the non-charging state may include a non-charging state in which the charging head is not inserted into the on-board charging device for new energy vehicles, and a non-charging state in which the new energy vehicle is fully charged but the charging head is not removed.

[0032] Referring to FIG. 1 , in some embodiments, the electric lock control circuit of the on-board charging device of a new energy vehicle may include a switch transistor 10, a control unit 20, a socket lock driving circuit 30, and a cap lock driving circuit 40.

[0033] The output terminal of the switch transistor 10 is connected to the power supply input terminals of the outlet lock drive circuit 30 and the cap lock drive circuit 40. When the switch transistor 10 is in the on state, power can be supplied to the outlet lock drive circuit 30 and the cap lock drive circuit 40 (i.e., the power is on), but when the switch transistor 10 is in the off state, power cannot be supplied to the outlet lock drive circuit 30 and the cap lock drive circuit 40 (i.e., the power is cut off).

[0034] The switch control terminal of the control unit 20 is connected to the control receiving terminal of the switch transistor 10. When the control unit 20 determines that the new energy vehicle is in a non-charging state, it stops outputting an ON control signal to the switch transistor 10, turning the switch transistor 10 off. The switch transistor 10 then cuts off the power supply to the outlet lock drive circuit 30 and the cap lock drive circuit 40, causing the outlet lock drive circuit 30 and the cap lock drive circuit 40 to stop their standby states. This reduces the power consumption of the on-board charging device for new energy vehicles when they are not charging, as well as the power consumption when the outlet lock drive circuit 30 and the cap lock drive circuit 40 continue to be in standby mode, even when the new energy vehicle is not charging. In addition, this method of reducing static power consumption can extend the operating life of the electric lock control circuit. Moreover, since the drive circuits (i.e., the outlet lock drive circuit 30 and the cap lock drive circuit 40) are not always kept in a powered state, the external radiation from the drive circuits is also reduced, which is also advantageous for reducing the total radiation of new energy vehicles.

[0035] In some embodiments, the control unit 20 may determine whether the new energy vehicle is in a non-charging state by detecting the charging state of the new energy vehicle. For example, if it is detected that the new energy vehicle is currently in a fully charged state, it may be determined that the new energy vehicle is in a non-charging state. In other embodiments, the control unit 20 may determine whether the new energy vehicle is in a non-charging state by detecting the state of the outlet lock and / or cap lock. For example, taking the outlet lock as an example, if it is detected that the outlet lock is unlocked, it may indicate that no charging head is currently inserted into the on-board charging device of the new energy vehicle, and it may therefore be determined that the new energy vehicle is in a non-charging state. Furthermore, taking the cap lock as an example, if it is detected that the cap lock is locked, it may indicate that the on-board charging device of the new energy vehicle is currently capped with a cover plate, and it may therefore be determined that the new energy vehicle is in a non-charging state. Of course, in other embodiments, the detection of the outlet lock and cap lock states can be comprehensively utilized to determine whether the new energy vehicle is in a non-charging state, thereby improving the accuracy of the judgment.

[0036] Outlet locks and cap locks generally use electric motors to perform locking and unlocking operations. Therefore, the outlet locks and cap locks require corresponding motor drive circuits to drive the outlet lock motors and cap lock motors accordingly to perform the locking and unlocking operations. Therefore, the outlet lock motor drive circuit may be referred to as the outlet lock drive circuit 30, and the cap lock motor drive circuit may be referred to as the cap lock drive circuit 40. In some embodiments, the outlet lock drive circuit 30 and the cap lock drive circuit 40 may be combined into a motor drive module (e.g., a motor drive chip). For example, in the embodiment shown in FIG. 4, the outlet lock drive circuit 30 may be a motor drive chip U1, and the cap lock drive circuit 40 may be a motor drive chip U2. The embodiments herein do not relate to improvements to the outlet lock drive circuit 30 and the cap lock drive circuit 40, so their description will be omitted.

[0037] The switch transistor 10 is a controlled semiconductor device, such as a transistor, with a small internal resistance. By using the switch transistor 10 with a small internal resistance as an electronic switch, the voltage drop at that point can be controlled within a very small range, without affecting the power supply voltage to the rear end driving circuit, and meeting the static power consumption requirements of new energy vehicles when not charging. In some embodiments, the triode may be a bipolar junction transistor (BJT), a junction field-effect transistor (JFET), a metal oxide semiconductor field-effect transistor (MOSFET), a V-groove metal-oxide semiconductor field-effect transistor (VMOS), or the like, and specific types may be selected according to the requirements of actual applications.

[0038] 4, the switch transistor 10 may be an N-channel enhancement type MOS field effect transistor (hereinafter simply referred to as MOS transistor) Q1. The drain of the MOS transistor Q1 (terminal 30F_IN in FIG. 4) is connected to the power supply, the source of the MOS transistor Q1 is connected to the power supply input terminals of the outlet lock driving circuit 30 and the cap lock driving circuit 40, and the gate of the MOS transistor Q1 is connected to the switch control terminal of the control unit (terminal LOCK_PWR_EN in FIG. 4) by a voltage divider circuit.

[0039] As shown in FIG. 4, in some embodiments, the voltage divider circuit includes a first voltage divider resistor R4 and a second voltage divider resistor R5, one end of the first voltage divider resistor R4 is connected to the switch control terminal of the control unit, the other end of the first voltage divider resistor R4 is connected to one end of the second voltage divider resistor R5, the other end of the second voltage divider resistor R5 is grounded, and the junction point between the first voltage divider resistor R4 and the second voltage divider resistor R5 is connected to the gate of MOS transistor Q1. The voltage divider circuit formed by the first voltage divider resistor R4 and the second voltage divider resistor R5 can supply a DC voltage to the drain of MOS transistor Q1, i.e., generate a DC bias voltage at the drain of MOS transistor Q1. Therefore, the voltage divider circuit may be referred to as a voltage-dividing DC bias circuit.

[0040] The control unit 20 is a control and processing center for the entire on-board charging device of the new energy vehicle, and in some embodiments, the control unit 20 may include, but is not limited to, a one-chip machine, a microcontroller unit (MCU), a microprocessor unit (MPU), a digital signal processor (DSP), a programmable logic controller (PLC), etc.

[0041] 2, in some other embodiments, the control unit 20 further includes a first drive control terminal and a second drive control terminal, the first drive control terminal being connected to the first drive receiving terminal of the outlet lock drive circuit 30, and the second drive control terminal being connected to the second drive receiving terminal of the cap lock drive circuit 40. Correspondingly, the control unit 20 may also be used as follows: when it is determined that the new energy vehicle needs to be charged, it outputs an ON control signal to the switch transistor 10 to turn on the switch transistor 10, and outputs a drive signal to the outlet lock drive circuit 30 and / or the cap lock drive circuit 40, so that the outlet lock drive circuit 30 and the cap lock drive circuit 40 respectively drive the outlet lock motor and the cap lock motor to lock and unlock.

[0042] The control unit 20 outputs a driving signal to the outlet lock driving circuit 30 and / or the cap lock driving circuit 40, which means that the control unit 20 may selectively output a driving signal to the outlet lock driving circuit 30 and / or the cap lock driving circuit 40 according to different control logics. For example, the following cases are possible: when only the cover plate of the on-board charging device for a new energy vehicle needs to be opened, the control unit 20 may output a driving signal only to the cap lock driving circuit 40, and stop outputting the driving signal to the cap lock driving circuit 40 when it determines that the cover plate of the on-board charging device for a new energy vehicle has been opened. In addition, when the cover plate of the on-board charging device for a new energy vehicle is already opened and a charging head is inserted into the on-board charging device for a new energy vehicle, the control unit 20 may output a driving signal only to the outlet lock driving circuit 30 to lock the charging head to the on-board charging device for a new energy vehicle, and stop outputting the driving signal to the outlet lock driving circuit 30 when it determines that the charging head has already been locked to the on-board charging device for a new energy vehicle.

[0043] In some embodiments, the control unit 20 may determine that charging of the new energy vehicle is necessary when receiving a charging instruction. For example, detecting that a charging head has been inserted into an on-board charging device for a new energy vehicle corresponds to receiving a charging instruction. Of course, this is merely an exemplary description, and in other embodiments, if the control unit 20 can identify a state or event related to the user charging the new energy vehicle, it may be considered that the control unit 20 has received a charging instruction. Therefore, this specification does not uniquely limit this.

[0044] In some embodiments, the control unit 20 further includes a first feedback receiving terminal and a second feedback receiving terminal, the first feedback receiving terminal being connected to a first state feedback terminal of the outlet lock driving circuit 30, and the second feedback receiving terminal being connected to a second state feedback terminal of the cap lock driving circuit 40. Therefore, the control unit 20 may further be used to: upon receiving a first self-protection state signal fed back from the outlet lock driving circuit 30 and / or a second self-protection state signal fed back from the cap lock driving circuit 40, make a self-protection decision based on the first self-protection state signal and / or the second self-protection state signal.

[0045] In some embodiments, making a self-protection determination based on the first self-protection status signal and / or the second self-protection status signal may include: stopping output of a drive signal to the outlet lock drive circuit 30 when a first self-protection status signal is received; stopping output of a drive signal to the cap lock drive circuit 40 when a second self-protection status signal is received; and stopping output of drive signals to the outlet lock drive circuit 30 and the cap lock drive circuit 40 or ceasing output of an ON control signal to the switch transistor 10 when both the first self-protection status signal and the second self-protection status signal are received.

[0046] 1 or 2, in some embodiments, the outlet lock driver circuit 30 and the cap lock driver circuit 40 may be integrated chips that internally integrate functions such as driving an H-bridge circuit, providing real-time current feedback, and outputting a self-protection status signal. Here, the self-protection may include, but is not limited to, undervoltage protection, overcurrent protection, and overtemperature protection. For example, in the embodiment shown in FIG. 4, the pin functions of the motor driver chip U1 and the motor driver chip U2 are as follows: GND is the reference ground terminal, IN2 / IN3 are drive receiving terminals connected to the drive control terminal of the control unit 20, nFAULT is a status feedback terminal connected to the feedback receiving terminal of the control unit 20 to feed back the self-protection status signal to the control unit 20, VM is a power supply input terminal connected to the source of the MOS transistor Q1, OUT1 and OUT2 are drive output terminals that control the positive output, negative output and their output direction by combining high and low levels to realize drive control for locking and unlocking. ISEN is a current detection resistor terminal that can be used to detect the lock status (e.g., whether it is successfully locked or unlocked), but if this function is not required, the current detection resistor terminal can be grounded.

[0047] When the outlet lock drive circuit 30 or the cap lock drive circuit 40 detects an abnormality such as undervoltage, overcurrent, and / or overtemperature in its own circuit, it may output a self-protection status signal to the control unit 20 via its status feedback terminal. However, the status feedback terminal of the outlet lock drive circuit 30 or the cap lock drive circuit 40 may unintentionally output a self-protection status signal (i.e., output a false protection signal) due to external interference or other reasons. In this case, the control unit 20 may erroneously determine that a failure has occurred in the outlet lock drive circuit 30 or the cap lock drive circuit 40 and may stop driving or power supply, which may affect the charging process.

[0048] Therefore, as shown in FIG. 3 , in some other embodiments, the electric lock control circuit of the on-board charging device for new energy vehicles may further include a first self-protection output filter circuit 61 and a second self-protection output filter circuit 62. Here, the first self-protection output filter circuit 61 is provided between the first feedback receiving end and the first status feedback end, and can filter out the false protection signal of the outlet lock driving circuit 30 by level filtering the first self-protection status signal. The second self-protection output filter circuit 62 is provided between the second feedback receiving end and the second status feedback end, and can filter out the false protection signal of the cap lock driving circuit 40 by level filtering the second self-protection status signal.

[0049] 4, in some other embodiments, the first self-protection output filter circuit 61 includes a first pull-up resistor R3 and a fifth capacitor C3, one end of the first pull-up resistor R3 is connected to one end of the fifth capacitor C3, the other end of the first pull-up resistor R3 is connected to a power supply voltage, the other end of the fifth capacitor C3 is grounded, and a junction point between one end of the first pull-up resistor R3 and the fifth capacitor C3 is connected to the first state feedback terminal. The second self-protection output filter circuit 62 includes a second pull-up resistor R8 and a sixth capacitor C6, one end of the second pull-up resistor R8 is connected to one end of the sixth capacitor C6, the other end of the second pull-up resistor R8 is connected to a power supply voltage, the other end of the sixth capacitor C6 is grounded, and a junction point between one end of the second pull-up resistor R8 and the sixth capacitor C6 is connected to the second state feedback terminal.

[0050] 2, in some other embodiments, the electric lock control circuit of the on-board charging device for new energy vehicles may further include a first output interface protection circuit 51 and a second output interface protection circuit 52. Here, the first output interface protection circuit 51 is provided between the output end of the outlet lock driving circuit 30 and the wiring terminal of the outlet lock, and can release the induced electromotive force at the output end of the outlet lock driving circuit 30 and filter out interference caused by electrostatic discharge at the output end. The second output interface protection circuit 52 is provided between the output end of the cap lock driving circuit 40 and the wiring terminal of the cap lock, and can release the induced electromotive force at the output end of the cap lock driving circuit 40 and filter out interference caused by electrostatic discharge at the output end.

[0051] 5, in some embodiments, the second output interface protection circuit 52 may include a first capacitor C1, a second capacitor C2, a first clamp diode D1, and a second clamp diode D2. One end of the first capacitor C1 is connected to one end of the first clamp diode D1, the other end of the first capacitor C1 and the other end of the first clamp diode D1 are grounded, and the connection point between the first capacitor C1 and the first clamp diode D1 is connected to the negative output terminal (i.e., F_LK− in FIG. 5) of the cap lock drive circuit 40. One end of the second capacitor C2 is connected to one end of the second clamp diode D2, the other end of the second capacitor C2 and the other end of the second clamp diode D2 are grounded, and the connection point between the second capacitor C2 and the second clamp diode D2 is connected to the positive output terminal (i.e., F_LK+ in FIG. 5) of the cap lock drive circuit 40.

[0052] 5, in some embodiments, the first output interface protection circuit 51 may include a third capacitor C4, a fourth capacitor C5, a third clamp diode D3, and a fourth clamp diode D4. One end of the third capacitor C4 is connected to one end of the third clamp diode D3, the other end of the third capacitor C4 and the other end of the third clamp diode D3 are grounded, and the connection point between the third capacitor C4 and the third clamp diode D3 is connected to the negative output terminal (i.e., C_LK- in FIG. 5) of the outlet lock drive circuit 30. One end of the fourth capacitor C5 is connected to one end of the fourth clamp diode D4, the other end of the fourth capacitor C5 and the other end of the fourth clamp diode D4 are grounded, and the connection point between the fourth capacitor C5 and the fourth clamp diode D4 is connected to the positive output terminal (i.e., C_LK+ in FIG. 5) of the outlet lock drive circuit 30.

[0053] The first clamp diode D1, the second clamp diode D2, the third clamp diode D3, and the fourth clamp diode D4 may be TVS (Transient Voltage Suppressor, also known as Zener diode) clamp diodes. The first clamp diode D1, the second clamp diode D2, the third clamp diode D3, and the fourth clamp diode D4 can suppress interference caused by electrostatic discharge at the interface (i.e., the driver circuit output interface) and help quickly release induced electromotive force in the electric lock coil, thereby protecting the pre-stage driver circuit. The four filter capacitors, namely, the first capacitor C1, the second capacitor C2, the third capacitor C4, and the fourth capacitor C5, can further suppress high-frequency interference entering the interface. Here, electrostatic discharge interference refers to interference caused by external electrostatic discharge that occurs during lock installation, circuit board assembly, or operation under complex conditions. The induced electromotive force refers to the conductive and radiated interference of induced electromotive force drawn by the lock itself. Induced electromotive force can enter the circuit through the wiring terminal of the lock and cause damage to the circuit. A clamp diode can introduce the high voltage / current caused by the induced electromotive force to GND, preventing damage to the elements inside the circuit.

[0054] Continuing to refer to FIG. 5, in some embodiments, for structural simplicity, the wiring terminals of the outlet lock and the wiring terminals of the cap lock may share a single integrated terminal 70. The positive output terminal and the negative output terminal (i.e., C_LK+ and C_LK- in FIG. 5) of the outlet lock driving circuit 30 are respectively connected to the first terminal and the second terminal of the integrated terminal 70, and the positive output terminal and the negative output terminal (i.e., F_LK+ and F_LK- in FIG. 5) of the cap lock driving circuit 40 are respectively connected to the third terminal and the fourth terminal of the integrated terminal 70.

[0055] For the sake of convenience, the above description of the device has been divided into various units according to their functions. Of course, when implementing this specification, the functions of each unit may be realized by the same or multiple pieces of software and / or hardware.

[0056] Corresponding to the electric lock control circuit of the on-board charging device for new energy vehicles described above, the embodiments in this specification further provide an on-board charging device for new energy vehicles, in which the electric lock control circuit is arranged.

[0057] Corresponding to the on-board charging device for new energy vehicles, the embodiments in this specification further provide a new energy vehicle equipped with the on-board charging device for new energy vehicles.

[0058] In response to the new energy vehicle, the embodiments herein further provide a control method for an on-board charging device of a new energy vehicle, which may be used in the on-board charging device of the new energy vehicle. As shown in FIG. 6 , in some embodiments, the control method includes: Step S601: determining whether the new energy vehicle is in a non-charging state; and step S602, when the new energy vehicle is in a non-charging state, stopping outputting the ON control signal to the switch transistor to turn the switch transistor into an OFF state.

[0059] In some embodiments, before determining whether the new energy vehicle is in a non-charging state, the control method includes: Determining whether the new energy vehicle needs to be charged; The method may further include outputting an ON control signal to the switch transistor to turn on the switch transistor when the new energy vehicle needs to be charged.

[0060] In some embodiments, after outputting an ON control signal to the switch transistor, the control method includes: The method may further include outputting a drive signal to the outlet lock drive circuit and / or the cap lock drive circuit.

[0061] In some embodiments, after outputting an ON control signal to the switch transistor, the control method includes: The method may further include, when receiving a first self-protection status signal fed back from the outlet lock drive circuit and / or a second self-protection status signal fed back from the cap lock drive circuit, making a self-protection determination based on the first self-protection status signal and / or the second self-protection status signal.

[0062] In some embodiments, the control method includes making a self-protection determination based on the first self-protection status signal and / or the second self-protection status signal, When receiving the first self-protection state signal, stopping outputting the ON control signal to the switch transistor and outputting outlet lock failure information; When receiving the second self-protection state signal, stopping outputting the ON control signal to the switch transistor and outputting cap lock fault information; When the first self-protection status signal and the second self-protection status signal are received simultaneously, the output of the ON control signal to the switch transistor may be stopped, and outlet lock fault information and cap lock fault information may be output.

[0063] The processes described above include operations that are presented in a particular order; however, it should be understood that the processes may include more or fewer operations, and that the operations may be performed sequentially or in parallel (e.g., when using parallel processors or multi-threaded environments).

[0064] Embodiments herein also provide a computer device. As shown in FIG. 7 , in some embodiments herein, the computer device 702 may include one or more processors 704, such as one or more central processing units (CPUs) or graphics processors (GPUs), where each processing unit may implement one or more hardware threads. The computer device 702 may further include an optional memory 706 for storing any type of information, such as code, configuration, data, etc. In a specific embodiment, the memory 706 stores a computer program executable by the processor 704. When the computer program is executed by the processor 704, it can execute instructions of the control method for an on-board charging device for a new energy vehicle described in any of the above embodiments. Without limitation, the memory 706 may include, for example, one or a combination of any type of RAM, any type of ROM, a flash memory device, a hard disk, an optical disk, etc. Generally, any memory may store information using any technology. Furthermore, any memory may provide volatile or non-volatile storage for information. Additionally, any memory may be depicted as a fixed or removable component of computing device 702. In some cases, associated instructions stored in any memory or combination of memories, when executed by processor 704, may cause computing device 702 to perform any operation according to the associated instructions. Computing device 702 further includes one or more drives 708 for interacting with any memory, including, for example, a hardware drive, an optical disk drive, or the like.

[0065] The computing device 702 may further include an input / output interface 710 (I / O) for accepting various inputs (via input devices 712) and providing various outputs (via output devices 714). One particular output mechanism may include a graphical user interface 718 (GUI) associated with a presentation device 716. In other embodiments, the input / output interface 710 (I / O), input devices 712, and output devices 714 may not be included and the computing device may function as only one computing device in a network. The computing device 702 may further include one or more network interfaces 720 for exchanging data with other devices via one or more communication links 722. The above-described components are coupled together by one or more communication buses 724.

[0066] The communications link 722 may be implemented in any manner, such as a local area network, a wide area network (e.g., the Internet), a point-to-point connection, or any combination thereof. The communications link 722 may include any combination of hardwired links, wireless links, routers, gateway functions, name servers, etc. governed by any protocol or combination of protocols.

[0067] The present application is described with reference to flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to some embodiments herein. It should be understood that each process and / or block in the flowcharts and / or block diagrams, and combinations of processes and / or blocks in the flowcharts and / or block diagrams, may be implemented by computer program commands. These computer program commands may be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processor to generate an apparatus, which, when executed by the processor of the computer or other programmable data processor, generates an apparatus for implementing the function(s) specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0068] These computer program commands may be stored in a computer-readable memory that can direct a computer or other programmable data processor to operate in a particular manner, such that the commands stored in the computer-readable memory cause a product including a command device to implement the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0069] These computer program commands may be loaded into a computer or other programmable data processor, causing the computer or other programmable device to execute a series of operational steps to produce a computer-implemented process, and the commands executed by the computer or other programmable device provide steps for implementing the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0070] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0071] Memory may include non-permanent memory, random access memory (RAM), and / or non-volatile memory in the form of a computer-readable medium, such as read-only memory (ROM) or flash memory (flash RAM). Memory is one example of a computer-readable medium.

[0072] Computer-readable media include permanent and non-permanent, removable and non-removable media, and may be implemented by any method or technology for storing information. Information may be computer-readable commands, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage device, magnetic cassette, magnetic disk storage device or other magnetic storage device, or any other non-transmission medium capable of storing information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media, such as modulated data signals or carriers.

[0073] As will be appreciated by those skilled in the art, the embodiments herein may be provided as a method, a system, or a computer program product. As such, the embodiments herein may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the embodiments herein may take the form of a computer program product embodied in one or more computer-usable storage media (including, but not limited to, disk memory, CD-ROM, optical memory, etc.) containing computer-usable program code.

[0074] Examples herein may be described in the general context of computer-executable commands, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. Examples herein may also be practiced in distributed computing environments where tasks are performed by remote processors that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media, including memory storage facilities.

[0075] It should be further understood that the technical term "and / or" in the embodiments of the present invention merely represents a relation between associated objects, and indicates that three kinds of relations may exist. For example, A and / or B can indicate three kinds of relations: the mere existence of A, the simultaneous existence of A and B, and the mere existence of B. In addition, in this document, the symbol " / " generally indicates that the associated objects before and after it have an "or" relationship.

[0076] Each embodiment of the present invention is described in an incremental manner, and the same or similar parts between the embodiments are cross-referenced, with each embodiment focusing on the differences from other embodiments. In particular, for the new energy vehicle embodiment, the on-board charging device embodiment for a new energy vehicle, and the control method for an on-board charging device for a new energy vehicle, the core improvements are basically similar to those of the electric lock control circuit embodiment for an on-board charging device for a new energy vehicle, so only a brief description of these embodiments will be given. For a description of the relevant parts, please refer to the description of the electric lock control circuit embodiment for an on-board charging device for a new energy vehicle.

[0077] In the description herein, the reference terms "one embodiment," "some embodiments," "examples," "specific examples," or "several examples" mean that the specific components, structures, materials, or features described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the exemplary descriptions using the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific components, structures, materials, or features described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, unless mutually inconsistent, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in the present invention.

[0078] The above description is merely an example of the present application and is not intended to limit the present application. Those skilled in the art may make various modifications and variations to the present application. Any amendments, equivalent replacements, improvements, etc. made within the spirit and principles of the present application are within the scope of the claims of the present application. [Explanation of symbols]

[0079] 10 switch transistor, 20 control unit, 30 outlet lock drive circuit, 40 cap lock drive circuit, 51 first output interface protection circuit, 52 second output interface protection circuit, 61 first self-protected output filter circuit, 62 second self-protected output filter circuit, 70 integrated terminal, 702 computer equipment, 704 processor, 706 memory, 708 drive mechanism, 710 input / output interface, 712 input device, 714 output device, 716 presentation device, 718 graphical user interface, 720 network interface, 722 communication link, 724 communication bus.

Claims

1. An electric lock control circuit for an on-board charging device for a new energy vehicle, an outlet lock drive circuit; a cap lock drive circuit; a switch transistor whose output terminal is connected to the power supply input terminals of the outlet lock drive circuit and the cap lock drive circuit, and which, when in an on state, allows power to be supplied to the outlet lock drive circuit and the cap lock drive circuit, but, when in an off state, prevents power from being supplied to the outlet lock drive circuit and the cap lock drive circuit; a control unit having a switch control end connected to a control receiving end of the switch transistor, the control unit stopping outputting an ON control signal to the switch transistor and turning the switch transistor into an OFF state when it is determined that the new energy vehicle is in a non-charging state; a first output interface protection circuit disposed between the output end of the outlet lock driving circuit and the wiring terminal of the outlet lock, for releasing the induced electromotive force at the output end of the outlet lock driving circuit and filtering out interference caused by the release of static electricity at the output end; a second output interface protection circuit disposed between the output terminal of the cap lock driving circuit and the wiring terminal of the cap lock, for releasing the induced electromotive force at the output terminal of the cap lock driving circuit and filtering out interference caused by the release of electrostatic charge at the output terminal; The wiring terminal of the outlet lock and the wiring terminal of the cap lock share one integrated terminal; The positive output terminal and the negative output terminal of the outlet lock driving circuit are respectively connected to the first end and the second end of the integrated terminal; The positive output terminal and the negative output terminal of the cap lock driving circuit are connected to the third terminal and the fourth terminal of the integrated terminal, respectively. An electric lock control circuit.

2. The control unit further includes a first drive control terminal and a second drive control terminal; The first drive control terminal is connected to the first drive receiving terminal of the outlet lock drive circuit, and the second drive control terminal is connected to the second drive receiving terminal of the cap lock drive circuit; The control unit further outputs an ON control signal to the switch transistor to turn on the switch transistor when it is determined that the new energy vehicle needs to be charged, and outputs a drive signal to the outlet lock drive circuit and / or the cap lock drive circuit.

2. The electric lock control circuit according to claim 1.

3. the switch transistor includes a field effect transistor; The drain of the field effect transistor is connected to a power supply, the source of the field effect transistor is connected to the power supply input terminals of the outlet lock driving circuit and the cap lock driving circuit, and the gate of the field effect transistor is connected to the switch control terminal of the control unit by a voltage divider circuit; 2. The electric lock control circuit according to claim 1.

4. the voltage dividing circuit includes a first voltage dividing resistor and a second voltage dividing resistor; One end of the first voltage dividing resistor is connected to a switch control terminal of the control unit, the other end of the first voltage dividing resistor is connected to one end of the second voltage dividing resistor, and the other end of the second voltage dividing resistor is grounded; 4. The electric lock control circuit according to claim 3, wherein a connection point between the first voltage dividing resistor and the second voltage dividing resistor is connected to a gate of the field effect transistor.

5. the second output interface protection circuit includes a first capacitance, a second capacitance, a first clamp diode, and a second clamp diode; one end of the first capacitor is connected to one end of the first clamp diode, the other end of the first capacitor and the other end of the first clamp diode are grounded, and a connection point between the first capacitor and the first clamp diode is connected to a negative output terminal of the capacitive load driver; one end of the second capacitance is connected to one end of the second clamp diode, the other end of the second capacitance and the other end of the second clamp diode are grounded, and a connection point between the second capacitance and the second clamp diode is connected to a positive output terminal of the cap lock drive circuit; 2. The electric lock control circuit according to claim 1.

6. the first output interface protection circuit includes a third capacitor, a fourth capacitor, a third clamp diode, and a fourth clamp diode; one end of the third capacitance is connected to one end of the third clamp diode, the other end of the third capacitance and the other end of the third clamp diode are grounded, and a connection point between the third capacitance and the third clamp diode is connected to a negative output terminal of the outlet lock drive circuit; one end of the fourth capacitance is connected to one end of the fourth clamp diode, the other end of the fourth capacitance and the other end of the fourth clamp diode are grounded, and the connection point between the fourth capacitance and the fourth clamp diode is connected to the positive output terminal of the outlet lock drive circuit; 2. The electric lock control circuit according to claim 1.

7. The control unit further includes a first feedback receiving end and a second feedback receiving end; The first feedback receiving terminal is connected to a first status feedback terminal of the outlet lock driving circuit; The second feedback receiving terminal is connected to a second state feedback terminal of the cap lock driving circuit; The control unit further performs a self-protection determination based on the first self-protection status signal and / or the second self-protection status signal when receiving a first self-protection status signal fed back from the outlet lock drive circuit and / or a second self-protection status signal fed back from the cap lock drive circuit.

2. The electric lock control circuit according to claim 1.

8. a first self-protection output filter circuit disposed between the first feedback receiving end and the first status feedback end, for filtering out and eliminating a false protection signal by level filtering the first self-protection status signal; a second self-protection output filter circuit, which is provided between the second feedback receiving end and the second status feedback end, for filtering and removing a false protection signal by level filtering the second self-protection status signal; 8. The electric lock control circuit according to claim 7.

9. the first self-protection output filter circuit includes a first pull-up resistor and a fifth capacitor; one end of the first pull-up resistor is connected to one end of the fifth capacitor, and the other end of the first pull-up resistor is connected to a power supply voltage; the other end of the fifth capacitor is grounded, and a connection point between one end of the first pull-up resistor and the fifth capacitor is connected to the first state feedback terminal; 9. The electric lock control circuit according to claim 8.

10. the second self-protection output filter circuit includes a second pull-up resistor and a sixth capacitor; one end of the second pull-up resistor is connected to one end of the sixth capacitor, and the other end of the second pull-up resistor is connected to a power supply voltage; the other end of the sixth capacitor is grounded, and a connection point between one end of the second pull-up resistor and the sixth capacitor is connected to the second state feedback terminal; 9. The electric lock control circuit according to claim 8.

11. An on-board charging device for a new energy vehicle, comprising the electric lock control circuit according to any one of claims 1 to 10.

12. A new energy vehicle, comprising the on-board charging device for a new energy vehicle according to claim 11.

Images