阅读说明：本技术 一种电子锁反馈电路、充电桩及其充电控制电路 (Electronic lock feedback circuit, charging pile and charging control circuit thereof ) 是由 张磊 楚秀全 吴胜 但德意 于 2021-07-28 设计创作，主要内容包括：本发明提供一种电子锁反馈电路、充电桩及其充电控制电路；该电子锁反馈电路,其中：各个接线端口和接地端口中的两个同时用于连接充电枪；接地端口还用于接地；电路选择单元用于依据充电枪的类型,选择两个信号判断电路中的至少一个接收充电枪的电子锁反馈信号,并依据电子锁反馈信号确定充电枪的工作状态；因此,无论充电枪的电子锁反馈信号为解锁断开锁止导通还是解锁导通锁止断开的不同类型,均可依据电子锁反馈信号确定充电枪的工作状态,实现硬件对软件的兼容,适用性强。(The invention provides an electronic lock feedback circuit, a charging pile and a charging control circuit thereof; this electronic lock feedback circuit, wherein: two of each wiring port and the grounding port are simultaneously used for connecting a charging gun; the grounding port is also used for grounding; the circuit selection unit is used for selecting at least one of the two signal judgment circuits to receive an electronic lock feedback signal of the charging gun according to the type of the charging gun and determining the working state of the charging gun according to the electronic lock feedback signal; therefore, no matter the electronic lock feedback signal of the charging gun is of different types of unlocking, disconnecting, locking and disconnecting, the working state of the charging gun can be determined according to the electronic lock feedback signal, the hardware is compatible with the software, and the applicability is strong.)

1. An electronic lock feedback circuit, comprising: the circuit comprises a circuit selection unit, a grounding port, at least one wiring port and at least two signal judgment circuits;

two of each wiring port and the grounding port are simultaneously used for connecting a charging gun so that the corresponding signal judgment circuit directly or indirectly receives an electronic lock feedback signal of the charging gun;

the grounding port is also used for grounding;

the circuit selection unit is used for selecting at least one of the two signal judgment circuits to determine the working state of the charging gun according to the type of the charging gun.

2. The electronic lock feedback circuit of claim 1, further comprising: a level conversion circuit;

the level conversion circuit is used for sending a first signal to the charging controller when the charging gun is in an unlocking state; and sending a second signal to the charging controller when the charging gun is in a locked state.

3. The electronic lock feedback circuit of claim 2, wherein the number of patch ports is 2;

the first end of the first signal judgment circuit is connected with the first wiring port;

the first end of the second signal judgment circuit is connected with the second wiring port;

the second end of the first signal judgment circuit and the second end of the second signal judgment circuit are respectively connected with the two ends of the first side of the circuit selection unit in a one-to-one correspondence manner;

the second side of the circuit selection unit is connected with the input end of the level conversion circuit;

and the output end of the level conversion circuit is used as the output end of the electronic lock feedback circuit.

4. The electronic lock feedback circuit of claim 2, wherein the number of patch ports is 1;

the second side of the circuit selection unit is connected with the first wiring port;

two ends of the first side of the circuit selection unit are respectively connected with the first end of the first signal judgment circuit and the first end of the second signal judgment circuit in a one-to-one correspondence manner;

the second end of the first signal judgment circuit and the second end of the second signal judgment circuit are respectively connected with the input end of the level conversion circuit;

and the output end of the level conversion circuit is used as the output end of the electronic lock feedback circuit.

5. The electronic lock feedback circuit of claim 3 or 4, wherein the first signal determination circuit comprises: a first resistor;

one end of the first resistor is respectively used as a first end and a second end of the first signal judgment circuit;

the other end of the first resistor is connected with a first power supply.

6. The electronic lock feedback circuit of claim 3 or 4, wherein the second signal determination circuit comprises: the third resistor, the fourth resistor, the fifth resistor and the first switch tube;

one end of the third resistor is connected with one end of the fourth resistor, and a connection point is used as a first end of the second signal judgment circuit;

the other end of the third resistor is connected with a first power supply;

the other end of the fourth resistor is connected with one end of the fifth resistor and the control end of the first switching tube respectively;

one end of the first switching tube is used as a second end of the second signal judgment circuit;

the other end of the fifth resistor and the other end of the first switch tube are both grounded.

7. The electronic lock feedback circuit according to claim 3 or 4, wherein the circuit selection unit comprises: a first switch and a second switch;

one end of the first switch is used as one end of a first side of the circuit selection unit;

one end of the second switch is used as the other end of the first side of the circuit selection unit;

the other end of the first switch is connected with the other end of the second switch, and a connection point is used as a second side of the circuit selection unit.

8. The electronic lock feedback circuit according to claim 7, wherein the first signal determining circuit determines the operating state of the charging gun when the first switch is closed and the second switch is opened;

and when the first switch is turned off and the second switch is turned on, the working state of the charging gun is determined by the second signal judgment circuit.

9. The electronic lock feedback circuit according to claim 3 or 4, wherein the level shift circuit comprises: a second resistor and a diode;

one end of the second resistor is connected with the anode of the diode, and the connection point is used as the output end of the level conversion circuit;

the other end of the second resistor is connected with a second power supply;

and the cathode of the diode is used as the input end of the level conversion circuit.

10. The electronic lock feedback circuit of claim 1, wherein the number of patch ports is 2;

the first end of the first signal judgment circuit is connected with the first wiring port;

the first end of the second signal judgment circuit is connected with the second wiring port;

the circuit selection unit is arranged between the second end of the first signal judgment circuit and the second end of the second signal judgment circuit;

and the output end of the second signal judgment circuit is used as the output end of the electronic lock feedback circuit.

11. The electronic lock feedback circuit of claim 10, wherein the first signal determining circuit comprises: a first resistor;

one end of the first resistor is respectively used as a first end and a second end of the first signal judgment circuit;

the other end of the first resistor is connected with a first power supply.

12. The electronic lock feedback circuit of claim 10, wherein the second signal determining circuit comprises: the circuit comprises a second resistor, a third resistor, a first switching tube and a fourth resistor;

one end of the second resistor is used as the first end of the second signal judgment circuit;

the other end of the second resistor is connected with one end of a third resistor and the control end of the first switching tube respectively;

one end of the first switch tube is connected with one end of the fourth resistor, and a connection point is used as the output end of the second signal judgment circuit;

the other end of the fourth resistor is connected with a second power supply;

the other end of the third resistor and the other end of the first switch tube are grounded.

13. The electronic lock feedback circuit of claim 10, wherein the circuit selection unit comprises: a first switch.

14. A charging control circuit for a charging pile, comprising: a charge controller and the electronic lock feedback circuit of any of claims 1-13;

two input ends of a charging gun of the charging pile are respectively connected to corresponding ports of the electronic lock feedback circuit;

and the output end of the electronic lock feedback circuit is connected with the charging controller.

15. The charging control circuit of the charging pile of claim 14, wherein when an electronic lock feedback signal in the charging gun indicates that the charging gun is in the unlocked state, the electronic lock feedback circuit outputs a first signal;

and when the electronic lock feedback signal in the charging gun represents that the charging gun is in a locking state, the electronic lock feedback circuit outputs a second signal.

16. The charging control circuit of the charging pile according to claim 14, wherein when the level shift circuit is disposed in the electronic lock feedback circuit:

if the electronic lock feedback signal of the charging gun is a normally open signal, a feedback line of the charging gun is connected with a corresponding port so as to be connected to a first signal judgment circuit and the ground in the electronic lock feedback circuit; a circuit selection unit in the electronic lock feedback circuit selects the first signal judgment circuit to determine the working state of the charging gun;

if the electronic lock feedback signal of the charging gun is a normally closed signal, the feedback line of the charging gun is connected with a corresponding port so as to be connected to a second signal judgment circuit and the ground in the electronic lock feedback circuit; the circuit selection unit selects the operating state of the charging gun determined by the second signal judgment circuit.

17. The charging control circuit of the charging pile according to claim 14, wherein when the output end of the second signal judging circuit is directly used as the output end of the electronic lock feedback circuit:

if the electronic lock feedback signal of the charging gun is a normally open signal, a feedback line of the charging gun is connected with a corresponding port so as to be connected to two signal judgment circuits in the electronic lock feedback circuit; a circuit selection unit in the electronic lock feedback circuit determines the working state of the charging gun through a second signal judgment circuit;

if the electronic lock feedback signal of the charging gun is a normally closed signal, the feedback line of the charging gun is connected with a corresponding port so as to be connected to a second signal judgment circuit and the ground in the electronic lock feedback circuit; the circuit selection unit selects the two signal judgment circuits to jointly determine the working state of the charging gun.

18. A charging pile, comprising: a charging gun, a power conversion module and a charge control circuit according to any one of claims 14-17;

the charging gun is used for supplying power to the electric automobile;

the charging control circuit is used for controlling the power conversion module according to the working state of the charging gun.

Technical Field

The invention belongs to the field of electronic lock feedback circuits, and particularly relates to an electronic lock feedback circuit, a charging pile and a charging control circuit of the charging pile.

Background

The feedback signal of the electronic lock of the dc charging gun is a switching signal, and the control principle of the electronic lock shown in fig. 1 is as follows, the electronic lock has two states as shown in table 1: the unlocking means is disconnected, and the locking means is closed; alternatively, unlocked means closed and locked means open.

Table 1: state of electronic lock

Such a fact causes the following problems: charging guns of different suppliers are selected, so that the unlocking and locking states of the charging guns are judged oppositely by software; and after the charging pile is installed on the site, if charging guns of different suppliers are replaced, if the feedback states of the electronic locks of the charging guns are opposite, the problem that software versions cannot be unified is also faced.

Disclosure of Invention

In view of the above, the present invention provides an electronic lock feedback circuit, a charging pile and a charging control circuit thereof, which determine a working state of a charging gun according to an electronic lock feedback signal of the charging gun, and the electronic lock feedback signal of the charging gun is applicable to both a normally open signal and a normally closed signal.

The invention discloses a first aspect of an electronic lock feedback circuit, comprising: the circuit comprises a circuit selection unit, a grounding port, at least one wiring port and at least two signal judgment circuits;

two of each wiring port and the grounding port are simultaneously used for connecting a charging gun so that the corresponding signal judgment circuit directly or indirectly receives an electronic lock feedback signal of the charging gun;

the grounding port is also used for grounding;

the circuit selection unit is used for selecting at least one of the two signal judgment circuits to determine the working state of the charging gun according to the type of the charging gun.

Optionally, the method further includes: a level conversion circuit;

the level conversion circuit is used for sending a first signal to the charging controller when the charging gun is in an unlocking state; and sending a second signal to the charging controller when the charging gun is in a locked state.

Optionally, the number of the wiring ports is 2;

the first end of the first signal judgment circuit is connected with the first wiring port;

the first end of the second signal judgment circuit is connected with the second wiring port;

the second end of the first signal judgment circuit and the second end of the second signal judgment circuit are respectively connected with the two ends of the first side of the circuit selection unit in a one-to-one correspondence manner;

the second side of the circuit selection unit is connected with the input end of the level conversion circuit;

and the output end of the level conversion circuit is used as the output end of the electronic lock feedback circuit.

Optionally, the number of the wiring ports is 1;

the second side of the circuit selection unit is connected with the first wiring port;

two ends of the first side of the circuit selection unit are respectively connected with the first end of the first signal judgment circuit and the first end of the second signal judgment circuit in a one-to-one correspondence manner;

the second end of the first signal judgment circuit and the second end of the second signal judgment circuit are respectively connected with the input end of the level conversion circuit;

and the output end of the level conversion circuit is used as the output end of the electronic lock feedback circuit.

Optionally, the first signal determining circuit includes: a first resistor;

one end of the first resistor is respectively used as a first end and a second end of the first signal judgment circuit;

the other end of the first resistor is connected with a first power supply.

Optionally, the second signal determining circuit includes: the third resistor, the fourth resistor, the fifth resistor and the first switch tube;

one end of the third resistor is connected with one end of the fourth resistor, and a connection point is used as a first end of the second signal judgment circuit;

the other end of the third resistor is connected with a first power supply;

the other end of the fourth resistor is connected with one end of the fifth resistor and the control end of the first switching tube respectively;

one end of the first switching tube is used as a second end of the second signal judgment circuit;

the other end of the fifth resistor and the other end of the first switch tube are both grounded.

Optionally, the circuit selection unit includes: a first switch and a second switch;

one end of the first switch is used as one end of a first side of the circuit selection unit;

one end of the second switch is used as the other end of the first side of the circuit selection unit;

the other end of the first switch is connected with the other end of the second switch, and a connection point is used as a second side of the circuit selection unit.

Optionally, when the first switch is turned on and the second switch is turned off, the first signal judgment circuit determines the working state of the charging gun;

and when the first switch is turned off and the second switch is turned on, the working state of the charging gun is determined by the second signal judgment circuit.

Optionally, the level shift circuit includes: a second resistor and a diode;

one end of the second resistor is connected with the anode of the diode, and the connection point is used as the output end of the level conversion circuit;

the other end of the second resistor is connected with a second power supply;

and the cathode of the diode is used as the input end of the level conversion circuit.

Optionally, the number of the wiring ports is 2;

the first end of the first signal judgment circuit is connected with the first wiring port;

the first end of the second signal judgment circuit is connected with the second wiring port;

the circuit selection unit is arranged between the second end of the first signal judgment circuit and the second end of the second signal judgment circuit;

and the output end of the second signal judgment circuit is used as the output end of the electronic lock feedback circuit.

Optionally, the first signal determining circuit includes: a first resistor;

one end of the first resistor is respectively used as a first end and a second end of the first signal judgment circuit;

the other end of the first resistor is connected with a first power supply.

Optionally, the second signal determining circuit includes: the circuit comprises a second resistor, a third resistor, a first switching tube and a fourth resistor;

one end of the second resistor is used as the first end of the second signal judgment circuit;

the other end of the second resistor is connected with one end of a third resistor and the control end of the first switching tube respectively;

one end of the first switch tube is connected with one end of the fourth resistor, and a connection point is used as the output end of the second signal judgment circuit;

the other end of the fourth resistor is connected with a second power supply;

the other end of the third resistor and the other end of the first switch tube are grounded.

Optionally, the circuit selection unit includes: a first switch.

The second aspect of the present invention discloses a charging control circuit for a charging pile, including: a charge controller and an electronic lock feedback circuit according to any one of the first aspect of the invention;

two input ends of a charging gun of the charging pile are respectively connected to corresponding ports of the electronic lock feedback circuit;

and the output end of the electronic lock feedback circuit is connected with the charging controller.

Optionally, when an electronic lock feedback signal in the charging gun indicates that the charging gun is in an unlocked state, the electronic lock feedback circuit outputs a first signal;

and when the electronic lock feedback signal in the charging gun represents that the charging gun is in a locking state, the electronic lock feedback circuit outputs a second signal.

Optionally, when the level shift circuit is arranged in the feedback circuit of the electronic lock:

if the electronic lock feedback signal of the charging gun is a normally open signal, a feedback line of the charging gun is connected with a corresponding port so as to be connected to a first signal judgment circuit and the ground in the electronic lock feedback circuit; a circuit selection unit in the electronic lock feedback circuit selects the first signal judgment circuit to determine the working state of the charging gun;

if the electronic lock feedback signal of the charging gun is a normally closed signal, the feedback line of the charging gun is connected with a corresponding port so as to be connected to a second signal judgment circuit and the ground in the electronic lock feedback circuit; the circuit selection unit selects the operating state of the charging gun determined by the second signal judgment circuit.

Optionally, when the output end of the second signal determining circuit is directly used as the output end of the electronic lock feedback circuit:

if the electronic lock feedback signal of the charging gun is a normally open signal, a feedback line of the charging gun is connected with a corresponding port so as to be connected to two signal judgment circuits in the electronic lock feedback circuit; a circuit selection unit in the electronic lock feedback circuit determines the working state of the charging gun through a second signal judgment circuit;

if the electronic lock feedback signal of the charging gun is a normally closed signal, the feedback line of the charging gun is connected with a corresponding port so as to be connected to a second signal judgment circuit and the ground in the electronic lock feedback circuit; the circuit selection unit selects the two signal judgment circuits to jointly determine the working state of the charging gun.

The third aspect of the present invention discloses a charging pile, including: a charging gun, a power conversion module and a charging control circuit according to any one of the second aspect of the present invention;

the charging gun is used for supplying power to the electric automobile;

the charging control circuit is used for controlling the power conversion module according to the working state of the charging gun.

From the above technical solution, the present invention provides an electronic lock feedback circuit, wherein: two of each wiring port and the grounding port are simultaneously used for connecting a charging gun; the grounding port is also used for grounding; the circuit selection unit is used for selecting at least one of the two signal judgment circuits to receive an electronic lock feedback signal of the charging gun according to the type of the charging gun and determining the working state of the charging gun according to the electronic lock feedback signal; therefore, no matter the electronic lock feedback signal of the charging gun is of different types of unlocking, disconnecting, locking and disconnecting, the working state of the charging gun can be determined according to the electronic lock feedback signal, the hardware is compatible with the software, and the applicability is strong.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of control of an electronic lock in a charging gun provided in the prior art;

FIG. 2 is a schematic diagram of a feedback circuit of an electronic lock according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of another electronic lock feedback circuit according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating control of an electronic lock in a charging gun according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of another electronic lock feedback circuit provided in an embodiment of the present invention;

FIG. 6 is a schematic diagram of another electronic lock feedback circuit provided in accordance with an embodiment of the present invention;

FIG. 7 is a schematic diagram of another electronic lock feedback circuit provided in an embodiment of the present invention;

FIG. 8 is a schematic diagram of another electronic lock feedback circuit provided in accordance with an embodiment of the present invention;

FIG. 9 is a schematic diagram of another electronic lock feedback circuit provided in accordance with an embodiment of the present invention;

FIG. 10 is a schematic diagram of another electronic lock feedback circuit provided in accordance with an embodiment of the present invention;

FIG. 11 is a schematic diagram of another electronic lock feedback circuit provided in accordance with an embodiment of the present invention;

FIG. 12 is a schematic diagram of another electronic lock feedback circuit provided in accordance with an embodiment of the present invention;

FIG. 13 is a schematic diagram of another electronic lock feedback circuit provided in accordance with an embodiment of the present invention;

FIG. 14 is a schematic diagram of another electronic lock feedback circuit provided in accordance with an embodiment of the present invention;

FIG. 15 is a schematic diagram of another electronic lock feedback circuit provided in accordance with an embodiment of the present invention;

fig. 16 is a schematic diagram of another electronic lock feedback circuit according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The embodiment of the invention provides an electronic lock feedback circuit, which is used for solving the problem that in the prior art, the unlocking and locking states of a charging gun are judged oppositely by software due to the fact that the charging guns of different suppliers are selected; and after the charging pile is installed on the site, if charging guns of different suppliers are replaced, the feedback states of the electronic locks of the charging guns are opposite, and the problem that software versions cannot be unified is faced.

The electronic lock feedback circuit, see fig. 2, includes: a circuit selection unit 10, ground GND ports (wiring positions 1 and 2 shown in fig. 2), at least one wiring port (wiring position 3 shown in fig. 2), and at least two signal judgment circuits (21 and 22 shown in fig. 2).

Two of each wiring port and the grounding GND port are simultaneously used for connecting a charging gun so that the corresponding signal judgment circuit directly or indirectly receives an electronic lock feedback signal of the charging gun.

The ground GND port is also used for ground GND.

That is, two ports are selected from the plurality of ports to connect the charging gun; how it chooses which two ports can be determined according to the type of charging gun.

Specifically, two ends of a feedback line in the charging gun are respectively and correspondingly connected with two wiring ports, or one wiring port and one grounding GND port at two ends of the feedback line in the charging gun are connected; the method is not particularly limited, and is within the scope of the present application as appropriate.

It should be noted that each connection port is directly or indirectly connected to at least one signal determination circuit, so that when the connection port is connected to a charging gun, the signal determination circuit can receive a feedback signal of an electronic lock of the charging gun.

The two signal judgment circuits can be respectively and directly connected with the corresponding wiring ports so as to realize that the signal judgment circuits directly receive the electronic feedback signals of the charging gun; the two signal judgment circuits can also be respectively connected to corresponding wiring ports through the circuit selection unit 10; so as to realize that the signal judgment circuit indirectly receives the electronic feedback signal of the charging gun. The method is not particularly limited, and is within the scope of the present application as appropriate.

The circuit selection unit 10 is used for selecting at least one of the two signal judgment circuits to determine the working state of the charging gun according to the type of the charging gun.

It should be noted that the signal judgment circuit receiving the electronic feedback signal is selected to determine the working state of the charging robber; when the two signal judgment circuits receive the electronic feedback signal, the working state of the charging gun can be determined by selecting one of the signal judgment circuits; the method is not particularly limited, and is within the scope of the present application as appropriate.

In this embodiment, no matter the electronic lock feedback signal of the charging gun is the different types of unlocking disconnection locking or unlocking connection locking disconnection, the working state of the charging gun can be determined according to the electronic lock feedback signal, the compatibility of hardware to software is realized, if the charging gun needs to be replaced, the electronic lock feedback signal of the charging gun after replacement is opposite, the operation of the software is not influenced, the management of a software version is facilitated, and the applicability is strong.

It should be noted that the feedback circuit of the electronic lock has various specific structures, for example, two signal judgment circuits are in parallel connection or series connection; when the two signal judgment circuits are in parallel connection, selecting any one signal judgment circuit to determine the working state of the charging gun; and when the two signal judgment circuits are in a series relation, the two signal judgment circuits are selected to jointly determine the working state or one is taken as a main part and the other is taken as an auxiliary part to determine the working state.

The following describes the case where the two signal determination circuits are in parallel and series, respectively:

(1) the two signal judgment circuits are connected in parallel.

This electronic lock feedback circuit still includes: a level shift circuit 30.

The level shift circuit 30 is configured to send a first signal to the charge controller when the charging gun is in an unlocked state; and sending a second signal to the charge controller when the charging gun is in the locked state.

The level shift circuit 30 includes: a second resistor R2 and a diode D.

One end of the second resistor R2 is connected to the anode of the diode D, and the connection point is used as the output end of the level shift circuit 30; the other end of the second resistor R2 is connected with a second power supply; the cathode of the diode D serves as an input terminal of the level shifter circuit 30.

The second power supply is a 3.3 power supply.

The circuit selection unit 10 may be disposed before the two signal determination circuits, or may be disposed after the two signal determination circuits. These two cases are explained below separately:

1. referring to fig. 2, a circuit selection unit 10 is disposed after the two signal judgment circuits.

The number of the wiring ports is 2.

A first end of the first signal judgment circuit 21 is connected to the first wiring port; a first end of the second signal judgment circuit 22 is connected to the second wiring port; the second end of the first signal judgment circuit 21 and the second end of the second signal judgment circuit 22 are respectively connected with the two ends of the first side of the circuit selection unit 10 in a one-to-one correspondence manner; the second side of the circuit selection unit 10 is connected to the input terminal of the level shift circuit 30; the output terminal of the level shift circuit 30 serves as the output terminal of the feedback circuit of the electronic lock.

In practical applications, referring to fig. 3, the first signal judgment circuit 21 includes: a first resistor R1.

Specifically, one end of the first resistor R1 is respectively used as the first end and the second end of the first signal determining circuit 21; the other end of the first resistor R1 is connected to a first power supply.

In practical applications, referring to fig. 3, the second signal judging circuit 22 includes: a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a first switch tube Q1.

Specifically, one end of the third resistor R3 is connected to one end of the fourth resistor R4, and the connection point is used as the first end of the second signal determining circuit 22; the other end of the third resistor R3 is connected with a first power supply; the other end of the fourth resistor R4 is connected to one end of the fifth resistor R5 and the control end of the first switch transistor Q1, respectively; one end of the first switching tube Q1 is used as the second end of the second signal judging circuit 22; the other end of the fifth resistor R5 and the other end of the first switch tube Q1 are both grounded GND.

In practical applications, referring to fig. 3, the circuit selection unit 10 includes: a first switch K1 and a second switch K2.

One end of the first switch K1 serves as one end of the first side of the circuit selection unit 10; one end of the second switch K2 serves as the other end of the first side of the circuit selection unit 10; the other end of the first switch K1 and the other end of the second switch K2 are connected, and the connection point serves as a second side of the circuit selection unit 10.

When the first switch K1 is closed and the second switch K2 is opened, the working state of the charging gun is determined by the first signal judgment circuit 21; when the first switch K1 is opened and the second switch K2 is closed, the second signal judging circuit 22 determines the operating state of the charging gun.

The first switch K1 and the second switch K2 are dial switches.

If the feedback signal of the electronic lock of the charging gun is a normally closed signal, connecting a feedback line of the charging gun with a wiring position 1 and a wiring position 3; the first switch K1 is closed and the second switch K2 is opened to enable selection of the first signal judgment circuit 21 to determine the operating state of the charging gun.

If the charging gun is replaced, the feedback signal of the newly replaced charging pile electronic lock is a normally open signal, and the feedback line is connected with the wiring position 1 and the wiring position 3; the second switch K2 is closed and the first switch K1 is opened, so that selection of the second signal determination circuit 22 is achieved.

Therefore, in the locked state, the output of the level shift circuit 30 is 0V regardless of the normally closed signal type or the normally open signal type.

Specifically, the first case: the locking state of electronic lock is the disconnection in the rifle that charges, and the unblock state is the closure:

as shown in fig. 4 and 5, Sign + of the electronic lock of the charging gun is connected to "wiring position 1", Sign-is connected to "wiring position 3"; "connection location 2" is suspended. The first switch K1 is toggled to a closed position and the second switch K2 is toggled to an open position.

As shown in fig. 5, when the electronic lock is in the unlocked state, that is, when the electronic lock is in the conducting state between Sign + and Sign +, the feedback circuit of the electronic lock outputs a low level of 0V, that is, the charge controller obtains 0V; as shown in fig. 6, when the electronic lock is in a locked state, that is, in an open state between Sign + and Sign-, the electronic lock feedback circuit outputs a high level of 3.3V, that is, the charging controller obtains 3.3V.

In the second case: if change a rifle that charges this moment, the locking state of its electronic lock is the closure, and the unblock state is the disconnection:

as shown in fig. 7, Sign + of the electronic lock is connected to "wiring position 2", Sign-is connected to "wiring position 3"; the wiring position 1 is suspended; the second switch K2 toggles to a closed position and the first switch K1 toggles to an open position.

As shown in fig. 7, when the electronic lock is in an unlocked state, that is, when the electronic lock is in an open state between Sign + and Sign-, the first switching tube Q1 is turned on, and the feedback circuit of the electronic lock outputs a low level 0V, that is, the charging controller obtains 0V; as shown in fig. 8, when the electronic lock is in a locked state, that is, in a conducting state between Sign + and Sign-, the first switching tube Q1 is not conducting, and the feedback circuit of the electronic lock outputs a high level of 3.3V, that is, the charging controller obtains 3.3V.

2. Referring to fig. 9, a circuit selection unit 10 is disposed in front of the two signal judgment circuits.

The number of the wiring ports is 1.

The second side of the circuit selection unit 10 is connected to the first connection port; two ends of a first side of the circuit selection unit 10 are respectively connected with a first end of the first signal judgment circuit 21 and a first end of the second signal judgment circuit 22 in a one-to-one correspondence manner; the second end of the first signal judging circuit 21 and the second end of the second signal judging circuit 22 are respectively connected with the input end of the level converting circuit 30; the output terminal of the level shift circuit 30 serves as the output terminal of the feedback circuit of the electronic lock.

In practical applications, referring to fig. 10, the first signal judgment circuit 21 includes: a first resistor R1.

Specifically, one end of the first resistor R1 is respectively used as the first end and the second end of the first signal determining circuit 21; the other end of the first resistor R1 is connected to a first power supply.

In practical applications, the second signal determination circuit 22 includes: a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a first switch tube Q1.

Specifically, one end of the third resistor R3 is connected to one end of the fourth resistor R4, and the connection point is used as the first end of the second signal determining circuit 22; the other end of the third resistor R3 is connected with a first power supply; the other end of the fourth resistor R4 is connected to one end of the fifth resistor R5 and the control end of the first switch transistor Q1, respectively; one end of the first switching tube Q1 is used as the second end of the second signal judging circuit 22; the other end of the fifth resistor R5 and the other end of the first switch tube Q1 are both grounded GND.

In practical applications, the circuit selection unit 10 includes: a first switch K1 and a second switch K2.

One end of the first switch K1 serves as one end of the first side of the circuit selection unit 10; one end of the second switch K2 serves as the other end of the first side of the circuit selection unit 10; the other end of the first switch K1 and the other end of the second switch K2 are connected, and the connection point serves as a second side of the circuit selection unit 10.

When the first switch K1 is closed and the second switch K2 is opened, the working state of the charging gun is determined by the first signal judgment circuit 21; when the first switch K1 is opened and the second switch K2 is closed, the second signal judging circuit 22 determines the operating state of the charging gun.

The first switch K1 and the second switch are dial switches.

It should be noted that, in fig. 9 and fig. 10, when the charging guns are of different types, the connected ports are consistent with the operating states of the switches in the circuit selection unit 10, and details are not repeated here and are all within the protection scope of the present application.

(2) Referring to fig. 11, two signal determination circuits are in series relationship.

The number of the wiring ports is 2.

A first end of the first signal judgment circuit 21 is connected to the first wiring port; a first end of the second signal judgment circuit 22 is connected to the second wiring port; the circuit selection unit 10 is disposed between the second end of the first signal judgment circuit 21 and the second end of the second signal judgment circuit 22; that is, one end of the circuit selection unit 10 is connected to the second end of the first signal judgment circuit 21, and the other end of the circuit selection unit 10 is connected to the second end of the second signal judgment circuit 22.

In practical application, referring to fig. 12, the first signal judgment circuit 21 includes: a first resistor R1.

One end of the first resistor R1 is respectively used as the first end and the second end of the first signal judging circuit 21; the other end of the first resistor R1 is connected to a first power supply.

In practical applications, referring to fig. 12, the second signal judgment circuit 22 includes: the circuit comprises a second resistor R2, a third resistor R3, a first switch tube Q1 and a fourth resistor R4.

One end of the second resistor R2 is used as the first end of the second signal judging circuit 22; the other end of the second resistor R2 is respectively connected with one end of the third resistor R3 and the control end of the first switch tube Q1; one end of the first switch tube Q1 is connected to one end of the fourth resistor R4, and the connection point is used as the output end of the second signal judgment circuit 22; the other end of the fourth resistor R4 is connected with a second power supply; the other end of the third resistor R3 and the other end of the first switch tube Q1 are grounded GND.

In practical applications, referring to fig. 12, the circuit selection unit 10 includes: the first switch K1.

If the feedback signal of the electronic lock of the original charging gun is a normally closed signal. The feedback line is connected with the wiring position 1 and the wiring position 2; the first switch K1 is open.

If the charging gun is replaced, the feedback signal of the newly replaced charging pile electronic lock is a normally open signal, and the feedback line is connected with the wiring position 2 and the wiring position 3; the first switch K1 is closed.

Therefore, in the locked state, the output of the level shift circuit 30 is 0V regardless of the normally closed signal type or the normally open signal type. The level conversion is realized by the second signal decision circuit 22.

Specifically, the first case: the electronic lock is characterized in that the electronic lock is in an open state, and the electronic lock is in a closed state:

sign + of the electronic lock is connected with the wiring position 1, and Sign-is connected with the wiring position 2; the wiring position 3 is suspended; the first switch K1 toggles to the open position.

As shown in fig. 13, when the electronic lock is in the unlocked state, that is, in the conducting state between Sign + and Sign-, the first switching tube Q1 is conducting, and the feedback circuit of the electronic lock outputs a low level of 0V, that is, the charging controller obtains 0V. As shown in fig. 14, when the electronic lock is in a locked state, that is, the electronic lock is in an open state between Sign + and Sign-, the first switching tube Q1 is not conductive, and the electronic lock feedback circuit outputs a high level 3.3V, and the charge controller obtains 3.3V.

In the second case: if a charging gun is replaced at the moment, the locking state of the electronic lock is normally closed, and the unlocking state is disconnected:

sign + of the electronic lock is connected with the wiring position 2, and Sign-is connected with the wiring position 3; the wiring position 1 is suspended; the first switch K1 toggles to the closed position.

As shown in fig. 15, when the electronic lock is in the unlocked state, that is, when the electronic lock is in the disconnected state between Sign + and Sign-, the first switching tube Q1 is turned on, and the feedback circuit of the electronic lock outputs a low level 0V, that is, the charging controller obtains 0V; as shown in fig. 16, when the electronic lock is in a locked state, i.e. in a conducting state between Sign + and Sign-, the first switching tube Q1 is not conducting, and the feedback circuit of the electronic lock outputs a high level of 3.3V, i.e. the charging controller obtains 3.3V.

In the embodiment, the electronic lock feedback circuit outputs high level when the locking state is realized through flexible arrangement of different wiring modes and dial switches; when the electronic lock is in an unlocking state, the feedback circuit of the electronic lock outputs a low level; the electronic lock feedback signals of different types can be well unified, so that the software uniformity is guaranteed, the maintenance is easy, and the operation and maintenance of the charging pile are convenient.

Another embodiment of the present invention provides a charging control circuit for a charging pile, including: the electronic lock feedback circuit that charging controller and any embodiment provided above.

The working principle and the working process of the feedback circuit of the electronic lock refer to the above embodiments for details, which are not repeated herein.

Two input ends of a charging gun of the charging pile are respectively connected to corresponding ports of the electronic lock feedback circuit; the output end of the electronic lock feedback circuit is connected with the charging controller.

In practical application, when an electronic lock feedback signal in a charging gun indicates that the charging gun is in an unlocking state, an electronic lock feedback circuit outputs a first signal; when the electronic lock feedback signal in the charging gun represents that the charging gun is in a locking state, the electronic lock feedback circuit outputs a second signal.

The first signal is at a low level and the second signal is at a high level. That is, in the locked state, the charge controller attains a high level; in the unlocked state, the charge controller attains a low level.

(1) As shown in fig. 2 and 9, when the level shift circuit is provided in the feedback circuit of the electronic lock:

if the electronic lock feedback signal of the charging gun is a normally open signal, the feedback line of the charging gun is connected with a corresponding port so as to be connected to a first signal judgment circuit 21 and a ground GND in the electronic lock feedback circuit; the circuit selection unit 10 in the electronic lock feedback circuit selects the operating state of the charging gun determined by the first signal judgment circuit 21.

If the electronic lock feedback signal of the charging gun is a normally closed signal, the feedback line of the charging gun is connected with the corresponding port so as to be connected to a second signal judgment circuit 22 and ground GND in the electronic lock feedback circuit; the circuit selection unit 10 selects the operating state of the charging gun determined by the second signal judgment circuit 22.

For details of the specific working process and principle, reference is made to the embodiments corresponding to fig. 2 and fig. 9, which are not described herein again and are all within the scope of the present application.

(2) As shown in fig. 11, when the output terminal of the second signal determining circuit 22 is directly used as the output terminal of the feedback circuit of the electronic lock:

if the electronic lock feedback signal of the charging gun is a normally open signal, a feedback line of the charging gun is connected with a corresponding port so as to be connected to two signal judgment circuits in the electronic lock feedback circuit; the circuit selection unit 10 in the feedback circuit of the electronic lock determines the operating state of the charging gun by the second signal judgment circuit 22.

If the electronic lock feedback signal of the charging gun is a normally closed signal, the feedback line of the charging gun is connected with the corresponding port so as to be connected to a second signal judgment circuit 22 and ground GND in the electronic lock feedback circuit; the circuit selection unit 10 selects the two signal judgment circuits to jointly determine the working state of the charging gun.

For details of the specific working process and principle, reference is made to the embodiment corresponding to fig. 11, which is not described herein again, and all are within the protection scope of the present application.

Another embodiment of the present invention further provides a charging pile, including: the charging gun, the power conversion module and the charging control circuit provided by the embodiment are provided.

The charging gun is used for supplying power to the electric automobile; the charging control circuit is used for controlling the power conversion module according to the working state of the charging gun.

The working principle and the working process of the charging control circuit are described in detail in the above embodiments, and are not described in detail here.

Features described in the embodiments in the present specification may be replaced with or combined with each other, and the same and similar portions among the embodiments may be referred to each other, and each embodiment is described with emphasis on differences from other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.