Charging pile

Abstract

The utility model provides a charging pile, which comprises a charging pile socket, a charging gun and a resistance detection device, the charging gun is provided with a plurality of terminals, the charging pile socket is provided with a plurality of jacks respectively used for the plurality of terminals, and the resistance detection device is electrically connected to the charging pile socket and the charging gun. A plurality of loops are formed between the charging pile socket and the charging gun, each loop is formed by connecting one of the plurality of terminals with the corresponding jack in series through a resistance detection device, and the resistance detection device is used for detecting the total resistance value of the remaining loop parts except the resistance detection device in each loop in the at least one loop; and outputting information indicating whether the detected total resistance value of the loop is greater than the corresponding threshold value. According to the utility model, potential safety hazards caused by damage to the surface of the end of the charging gun can be detected and processed in time, and problems associated with independent measurement of the contact resistance of the end are avoided at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of vehicle charging, more particularly to a charging pile. BACKGROUND

[0002] With the accumulation of the use times of the charging pile, the surface of the end head in the charging gun contacting the vehicle end will be damaged, such as wear or scratch, etc. How to timely find the abnormal state of the end head surface caused thereby is a problem. In view of this, the prior art proposes some solutions.

[0003] One prior art solution is as follows: when the charging gun is put back into the socket at the end of the pile after use, the resistance value at the connection between the charging gun and the socket is measured, and the measured resistance value exceeding the reasonable range indicates that the charging gun needs to be replaced. However, it can be difficult to measure the end head contact resistance alone. SUMMARY

[0004] The purpose of the utility model is to provide an improved charging pile solution.

[0005] According to a first aspect of the utility model, a charging pile is provided, the charging pile comprising a charging pile socket, a charging gun and a resistance detection device, the charging gun having a plurality of terminals, the charging pile socket having a plurality of jacks for the plurality of terminals respectively, the resistance detection device being electrically connected to the charging pile socket and the charging gun, when the charging gun is inserted into the charging pile socket, a plurality of loops are formed between the charging pile socket and the charging gun, each loop being formed by one of the plurality of terminals connected in series with a corresponding jack through the resistance detection device, the resistance detection device being configured to detect a total resistance value of a remaining loop part in each loop except the resistance detection device in at least one loop, and output information indicating whether the detected total resistance value of the loop is greater than a corresponding threshold value.

[0006] The charging pile of the utility model, by introducing the resistance detection device for detecting the total resistance value of the remaining loop part in the loop except the resistance detection device, can timely detect and handle potential safety hazards caused by the damage to the end head surface of the charging gun, while avoiding the problems associated with measuring the end head contact resistance alone. BRIEF DESCRIPTION OF DRAWINGS

[0007] Non-limiting and non-exhaustive embodiments of the utility model are described by way of example with reference to the following drawings, in which:

[0008] Figure 1a is a schematic view showing a charging pile according to an embodiment of the utility model;

[0009] Figure 1b is a schematic view showing a charging pile according to another embodiment of the utility model;

[0010] Figure 1c is a schematic diagram showing a charging pile according to another embodiment of the present application;

[0011] Figure 2a and Figure 2b is a schematic diagram showing an example electronic lock and mechanical lock and related components used in a charging pile according to an embodiment of the present application;

[0012] Figure 3a and Figure 3b is a schematic diagram showing an example electronic lock and mechanical lock and related components used in a charging pile according to an embodiment of the present application;

[0013] Figure 4a is a schematic diagram showing a loop formed between a charging gun and a charging pile socket via a resistance detection device in a charging pile according to an embodiment of the present application;

[0014] Figure 4b is a schematic diagram showing a loop formed between a charging gun and a charging pile socket via a resistance detection device in the embodiment of Figure 1b ;

[0015] Figure 4c is a schematic diagram showing a loop formed between a charging gun and a charging pile socket via a resistance detection device in the embodiment of Figure 1c ;

[0016] Figure 5a and Figure 5b schematically show the arrangement of a plurality of terminals (contacts) at a charging pile socket and at a corresponding charging gun according to the national standard GBT 20234.3, respectively;

[0017] Figure 6a and Figure 6b schematically show the arrangement of a plurality of terminals (contacts) at a charging pile socket and at a corresponding charging gun according to the national standard GBT 20234.2, respectively. DETAILED DESCRIPTION

[0018] In order to make the above and other features and advantages of the present application more comprehensible, the present application will be further described below with reference to the drawings. The accompanying drawings form a part of this application and are used to explain the present application together with the embodiments of the present application. For the purpose of clarity and simplicity, detailed descriptions of known functions and configurations of the devices, apparatuses and / or equipment described herein will be omitted when it can make the subject matter of the present application unclear. It should be understood that the specific embodiments given herein are for the purpose of explanation and are only illustrative and are not restrictive.

[0019] The features described herein can be embodied in different forms, and should not be construed as being limited to the embodiments described herein. Rather, the embodiments described herein are provided merely as examples so as to illustrate a few of the many possible ways of implementing the devices and / or systems described herein, which will be apparent to those having the benefit of the disclosure of the present application.

[0020] As used herein, the term "and / or" includes any one of the associated listed items, as well as any combination of any two or more of the associated listed items.

[0021] Although terms such as "first", "second", and "third" can be used herein to describe various components, parts, portions, or elements, these components, parts, portions, or elements are not limited by these terms. Rather, these terms are used only to distinguish one component, part, portion, or element from another component, part, portion, or element. Therefore, the first component, part, portion, or element mentioned herein can also be referred to as the second component, part, portion, or element without deviating from the teachings of the present application.

[0022] The terminology used herein is for the purpose of describing various embodiments only and is not intended to limit the present disclosure. Unless the context clearly indicates otherwise, "a", "an", and "the" are intended to include both the singular and the plural, "including" and "comprising" specify the presence of stated features, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, operations, components, elements, and / or combinations thereof.

[0023] In the following description, numerous specific details are set forth to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without the need for the particular details as set forth in this description. In other instances, well-known steps or operations have not been described in detail in order to avoid obscuring the present application.

[0024] The charging pile of the present application can be used to charge a vehicle (e.g., an electric vehicle, a hybrid vehicle, etc.).

[0025] Reference Figure 1aAccording to one example charging column of an embodiment of the present application, the charging column comprises a charging column socket 3, a charging gun 4, and a resistance detection device 6. The charging gun 4 can have a plurality of terminals, and the charging column socket 3 can have a plurality of receptacles for the plurality of terminals, respectively. The resistance detection device 6 is electrically connected to the charging column socket 3 via a charging column socket cable 2, and is electrically connected to the charging gun 4 via a charging gun cable 5. When the charging gun 4 is inserted into the charging column socket 3, a plurality of loops are formed between the charging column socket 3 and the charging gun 4 via the resistance detection device 6, each loop being formed by one of the plurality of terminals being connected in series with a corresponding receptacle via the resistance detection device 6. The resistance detection device 6 is configured to detect a total resistance value of a remaining loop portion in each of the at least one loop, excluding the resistance detection device, and output information indicating whether the detected total resistance value of the loop is greater than a corresponding threshold value.

[0026] The charging column socket 3 is arranged in a charging column housing 1. The resistance detection device 6, the charging column socket cable 2, and at least a portion of the charging gun cable 5 are accommodated within the charging column housing 1.

[0027] The charging gun 4 can have a plurality of charging gun wires connected to the plurality of terminals, respectively, and the charging column socket 3 can have a plurality of charging column socket wires connected to the plurality of receptacles, respectively. The plurality of charging gun wires constitute at least a portion of the charging gun cable 5, and the plurality of charging column socket wires constitute at least a portion of the charging column socket cable 2. In this case, each loop is formed by one of the plurality of terminals being connected in series with a corresponding receptacle via a corresponding charging gun wire and the resistance detection device, and the remaining loop portion in each loop, excluding the resistance detection device, comprises one terminal of the charging gun and a corresponding charging gun wire, and a corresponding receptacle of the charging column socket and a corresponding charging column socket wire.

[0028] The total resistance value of the remaining loop portion in each loop, excluding the resistance detection device, can be detected in various possible ways. For example, in one embodiment, the resistance detection device first detects a loop resistance value of the entire loop, then subtracts the resistance value of the resistance detection device itself from the loop resistance value, and takes the difference thus obtained as the total resistance value of the remaining loop portion in the loop, excluding the resistance detection device.

[0029] The charging column of the prior art employs a charging column socket having a cavity, wherein the charging column socket is only used for placing a charging gun that is not in use. In contrast, in the case of the charging column of the present application, when the charging gun is inserted into the charging column socket, the plurality of terminals of the charging gun each form an electrical connection with a corresponding receptacle in the charging column socket, so that resistance measurement can be performed. In addition, the charging column of the present application facilitates gun detection without the need for additional sensors.

[0030] Figure 1aThe charging pile can be an alternating current charging pile or a direct current charging pile.

[0031] The information output by the resistance detection device can be in various possible forms. In one embodiment, the information comprises an electrical signal indicating that the total resistance value of the loop detection is greater than a corresponding threshold value, and the charging pile further comprises an electronic lock adapted to move between a locked position and an unlocked position. The resistance detection device is communicatively coupled to the electronic lock for outputting the electrical signal for moving the electronic lock to the locked position. When the electronic lock is in the locked position, the charging gun is locked to the charging pile socket and cannot be moved away from the charging pile socket.

[0032] With reference to Figure 1b , an example direct current charging pile according to an embodiment of the present application is shown, which comprises an electronic lock. Relative to Figure 1a the charging pile, Figure 1b the direct current charging pile further comprises an electronic lock arranged at the charging gun 4 and a main controller 7 as a main controller of the charging pile. The resistance detection device 6 is connected to the main controller 7 for outputting an electrical signal indicating that the total resistance value of the loop detection is greater than a corresponding threshold value to the main controller 7. The main controller 7 is connected to the electronic lock by a line for providing an enable signal to the electronic lock to move the electronic lock to the locked position, the enable signal being generated by the main controller 7 based on the electrical signal. Figure 1b As shown in , the line connecting the main controller 7 and the electronic lock is outside the charging gun cable 5; however, the present application is not limited thereto. Depending on the situation, it is possible that the line connecting the main controller 7 and the electronic lock is included in the charging gun cable 5.

[0033] Figure 1c With reference to Figure 1a , an example alternating current charging pile according to an embodiment of the present application is shown, which comprises an electronic lock arranged at the charging pile socket. Relative to Figure 1c the charging pile, Figure 1c the alternating current charging pile comprises an electronic lock arranged at the charging pile socket 3. The resistance detection device 6 is directly connected to the electronic lock by a line for outputting an electrical signal indicating that the total resistance value of the loop detection is greater than a corresponding threshold value to the electronic lock. The electrical signal serves as an enable signal to move the electronic lock to the locked position. Although not shown, the charging pile in

[0034] may also comprise a main controller as a main controller of the charging pile for controlling the operation of the charging pile. Figures 1a to 1c In

[0035] , a power supply connected to the resistance detection device 6 and the charging gun 4 is also shown. When the charging pile is used for charging, the power supply provides power for charging. Figure 1b Figure 1cA charging column, whose charging gun can have a mechanical lock cooperating with an electronic lock. In one embodiment, the mechanical lock comprises a rod-shaped body and has a handle portion at a proximal end of the rod-shaped body and a hook portion at a distal end of the rod-shaped body. Herein, "proximal end" refers to the end closer to the user when the user pulls the charging gun out of the charging column socket, and "distal end" refers to the end further away from the user when the user pulls the charging gun out of the charging column socket. The charging column socket has a recess cooperating with the hook portion, the hook portion is located in the recess when the charging gun is inserted into the charging column socket, and the handle portion is adapted to be manipulated to move in a first direction to cause the hook portion to move in a second direction out of the recess. The electronic lock is positioned relative to the mechanical lock such that when the electronic lock is in a locking position, the electronic lock prevents the movement of the handle portion in the first direction and / or the movement of the hook portion in the second direction. In one embodiment, the rod-shaped body is adapted to pivot about an axis, and the first direction and the second direction are opposite directions.

[0036] Referring to Figure 2a , Figure 2b , Figure 3a and Figure 3b , an example electronic lock and mechanical lock and some related parts are shown, including parts of the charging column socket shown in hatching. As shown, the mechanical lock comprises a rod-shaped body 24 adapted to pivot, and has a handle portion 25 at a proximal end of the rod-shaped body and a hook portion 28 at a distal end of the rod-shaped body. The charging column socket 3 has a recess 27 cooperating with the hook portion 28. When the charging gun 4 is inserted into the charging column socket 3, the hook portion 28 is located in the recess 27, and the handle portion 25 is adapted to be manipulated to move downward to cause the hook portion to move upward out of the recess.

[0037] In Figure 2a and Figure 2b , the electronic lock 26 is provided on the charging gun, near the handle portion 25, and is adapted to move in a front-back direction between a locking position (locked state) and a non-locking position (unlocked state). When the electronic lock 26 is in the locking position (locked state), the electronic lock 26 abuts against the handle portion 25 below the handle portion 25 of the mechanical lock, preventing the handle portion 25 from moving downward, as shown in Figure 2a . When the electronic lock 26 is in the non-locking position (unlocked state), the electronic lock 26 is located on a side of the handle portion 25 away from the hook portion 28, no longer abutting against the handle portion 25, and no longer affecting the movement of the handle portion 25, as shown in Figure 2b . Figure 2a and Figure 2b are advantageous for direct current charging columns.

[0038] In Figure 3a and Figure 3bIn particular embodiments, the electronic lock 26 is arranged at the charging post socket, near the recess 27, and is adapted to move in the front-rear direction between a locked position (locked state) and an unlocked position (unlocked state). When the electronic lock 26 is in the locked position (locked state), the electronic lock abuts against the hook portion 28 above the recess 27 of the charging post socket, preventing the hook portion 28 from moving upward, as shown in FIG. 8. When the electronic lock 26 is in the unlocked position (unlocked state), the electronic lock 26 is located on the side of the recess 27 away from the hook portion 28, and no longer abuts against the hook portion 28, not affecting the movement of the hook portion 28, as shown in FIG. 9. Figure 3b Figure 3a Figure 3a Figure 3b It is advantageous to provide the AC charging post with the electronic lock 26.

[0039] In embodiments in which the charging post is a DC charging post, the plurality of terminals of the charging gun can include a first terminal, a second terminal, and a third terminal, and the plurality of sockets of the charging post include a first socket, a second socket, and a third socket for the first terminal, the second terminal, and the third terminal, respectively; the at least one loop for resistance detection includes a first loop formed by the first terminal connected in series with the corresponding first socket through the resistance detection device, a second loop formed by the second terminal connected in series with the corresponding second socket through the resistance detection device, and a third loop formed by the third terminal connected in series with the corresponding third socket through the resistance detection device. In one embodiment, the first terminal, the second terminal, and the third terminal can be a direct current power positive (DC+) terminal, a direct current power negative (DC-) terminal, and a protective earth (PE) terminal, respectively; in this case, the first loop, the second loop, and the third loop can be referred to as a DC+ loop, a DC- loop, and a PE loop, respectively. In another embodiment, the plurality of terminals of the charging gun can include other possible terminals, such as one or more of the terminals (contacts) defined in the national standard GBT 20234.3.

[0040] The national standard GBT 20234.3 defines the arrangement of DC charging interfaces. The numbering, identification, and function definitions of the terminals (contacts) according to the standard are given in Table 1 below.

[0041] Table 1

[0042]

[0043] The DC+, DC-, and PE terminals are power line connection terminals, and resistance detection is recommended for them. Other low-voltage connection terminals have lower risk, and detection can not be performed thereon. For a DC charging post, only the DC+, DC-, and PE terminals can be arranged. However, the present application is not limited thereto, and other possible terminals can be arranged as needed by those skilled in the art.

[0044] Figure 5a and​​​Figure 5b The arrangement of the plurality of terminals (contacts) defined according to the national standard GBT 20234.3 at the charging pile socket and at the corresponding charging gun is shown respectively.

[0045] In the embodiment where the charging pile is an alternating current charging pile, the plurality of terminals of the charging gun can include a fourth terminal, a fifth terminal, and a sixth terminal, and the plurality of sockets of the charging pile socket include a fourth socket, a fifth socket, and a sixth socket for the fourth terminal, the fifth terminal, and the sixth terminal respectively; the at least one loop for resistance detection includes a fourth loop formed by the fourth terminal connected in series with the corresponding fourth socket through the resistance detection device, a fifth loop formed by the fifth terminal connected in series with the corresponding fifth socket through the resistance detection device, and a sixth loop formed by the sixth terminal connected in series with the corresponding sixth socket through the resistance detection device. In one embodiment, the fourth terminal, the fifth terminal, and the sixth terminal are the alternating current power (L) terminal, the neutral (N) terminal, and the protective earth (PE) terminal respectively; in this case, the fourth loop, the fifth loop, and the sixth loop can be referred to as the L loop, the N loop, and the PE loop respectively. In the case of single-phase alternating current, the alternating current power (L) terminal can include a single alternating current power terminal, L1 terminal; in the case of three-phase alternating current, the alternating current power (L) terminal can include three alternating current power terminals, L1 terminal, L2 terminal, and L3 terminal.

[0046] The national standard GBT 20234.2 defines the arrangement of alternating current charging interface. The numbering, identification, and function definition of the terminals (contacts) according to the standard are given in Table 2 below.

[0047] Table 2

[0048]

[0049] In the case of three-phase alternating current, the L1, L2, L3, N, and PE terminals are power line connection terminals, and resistance detection is recommended for them. Other low-voltage connection terminals have low risk and can not be detected. For alternating current charging piles, only alternating current power (e.g., L1 or L1-L3) terminals, N terminals, and PE terminals can be arranged. However, the present application is not limited thereto, and those skilled in the art can arrange other possible terminals as needed.

[0050] Figure 6a and Figure 6b The arrangement of the plurality of terminals (contacts) defined according to the national standard GBT 20234.2 at the charging pile socket and at the corresponding charging gun is shown respectively.

[0051] In one embodiment, the resistance detection device can comprise a voltage source, a current meter and a switching device connected in series, and a microcontroller. The switching device comprises at least one switch for controlling the turn-on and turn-off of at least one loop for resistance detection, respectively. The microcontroller is connected to the at least one switch for controlling the turn-off and turn-on of the at least one switch. The voltage source is for providing a voltage in the loop that is currently turned on among the at least one loop, and the current meter is for detecting the current in the loop that is currently turned on among the at least one loop, and the microcontroller is connected to the current meter for receiving the current detected by the current meter and outputting information indicating whether the total resistance detected by the loop is greater than a corresponding threshold value. Optionally, the resistance detection device can further comprise a current-limiting resistor connected in series with the voltage source, the current meter and the switching device. The current-limiting resistor can prevent short circuit caused by too small resistance in the loop, and the resistance of the current-limiting resistor can be selected to be, for example, 1000 Ω. In this case, the loop resistance of the entire loop can be obtained by using the voltage provided by the voltage source and the current measured by the current meter, and the difference between the loop resistance and the resistance of the current-limiting resistor can be taken as the total resistance of the remaining part of the loop other than the resistance detection device. Such total resistance measured at the time of product delivery (delivery total resistance) can be taken as a reference resistance. As the charging gun is used, the total resistance increases as wear occurs, and when the total resistance actually detected during use exceeds the reference resistance by a limit value (i.e., a safety threshold), it can be determined that the charging gun is invalid. The threshold value described above can be determined based on the corresponding reference resistance, for example, equal to the sum of the reference resistance and the corresponding limit value. In the case of resistance detection on more than one loop, the corresponding reference resistances can be different or the same, and / or the corresponding threshold values can be different or the same, depending on the specific circumstances.

[0052] In further embodiments, resistance detection can be implemented using a current source and a corresponding voltage meter, etc. according to Ohm's law; accordingly, the resistance detection device can have a different configuration from that described above.

[0053] Figure 4a The DC+ loop, the DC- loop and the PE loop formed between the charging gun and the charging pile socket via the resistance detection device in the embodiment of Figure 4b The DC+ loop, the DC- loop and the PE loop formed between the charging gun and the charging pile socket via the resistance detection device in the embodiment of Figure 1b The L loop, the N loop and the PE loop formed between the charging gun and the charging pile socket via the resistance detection device in the embodiment of Figure 4c The L loop, the N loop and the PE loop formed between the charging gun and the charging pile socket via the resistance detection device in the embodiment of Figure 1c The L loop, the N loop and the PE loop formed between the charging gun and the charging pile socket via the resistance detection device in the embodiment of Figure 4b and Figure 4cThe resistance detection device includes a resistor, a voltage source, an ammeter, and a switching device including relays S1, S2, and S3 as switches, all connected in series, and includes a microcontroller. The microcontroller controls the on and off states of each of the relays S1, S2, and S3. Additionally, the microcontroller is connected to the ammeter to receive the current detected by the ammeter and output an electrical signal indicating whether the total resistance of the detected circuit is greater than a corresponding threshold. This electrical signal can have two signal values: a first signal value indicating that the total resistance of the detected circuit is greater than the corresponding threshold (i.e., "fault") and a second signal value indicating that the total resistance of the detected circuit is greater than the corresponding threshold (i.e., "normal"). Figure 4b In the case of the DC charging pile shown, the microcontroller can send an electrical signal to the charging pile main controller, and then the charging pile main controller determines whether to perform gun locking based on the signal value of the electrical signal; if the electrical signal has a first signal value, the charging pile main controller decides to perform gun locking, and sends an enable signal to the electronic lock to lock the gun. Figure 4c In the case of the AC charging pile shown, the microcontroller directly sends the electrical signal to the electronic lock. When the electrical signal has a first signal value, it serves as an enable signal, causing the electronic lock to engage the locking mechanism. For example... Figure 4b and Figure 4c As shown, the connection from the microcontroller to the electronic lock or from the charging pile main controller to the electronic lock may include two lines, line 1 and line 2. In one embodiment, applying a high voltage (e.g., 5V) to line 1 and a low voltage (e.g., 0V) to line 2 can move the electronic lock to the locked position; conversely, applying the low voltage to line 1 and the high voltage to line 2 can unlock the electronic lock and move it to the unlocked position; when both line 1 and line 2 are at the low voltage, the electronic lock does not operate.

[0054] exist Figure 4b In the case of the switch control strategy given in Table 3, the relays S1, S2 and S3 can be controlled to perform no detection ("not detected"), resistance detection of the PE circuit ("measure PE circuit"), resistance detection of the DC- circuit ("measure DC- circuit"), or resistance detection of the DC+ circuit ("measure DC+ circuit").

[0055] Table 3

[0056]

[0057] exist Figure 4cIn the case of two or more loops, the relays S1, S2 and S3 can be controlled according to the switching control strategy given in Table 4 to not detect ("no detection"), to detect the resistance of the PE loop ("measure PE loop"), to detect the resistance of the N loop ("measure N loop"), or to detect the resistance of the L loop ("measure L loop").

[0058] Table 4

[0059]

[0060] In one embodiment, the resistance detection device performs the following processing: when the charging gun is plugged back into the charging pile socket, the resistance detection device detects the resistance of at least one loop formed, wherein in the case of two or more loops, the microcontroller controls the corresponding two or more switches to make the two or more loops conductive in turn to detect the total resistance of the remaining loop part in these loops except the resistance detection device in turn; compare the measured total resistance of each loop with the corresponding threshold value (for example, equal to the sum of the corresponding factory total resistance and the safety threshold); when the measured total resistance of each loop is less than or equal to the corresponding threshold value, a signal indicating normal is output by the microcontroller, indicating that the charging pile can be used normally; otherwise, the microcontroller sends an enable signal to the electronic lock directly or via the charging pile main controller, so that the electronic lock moves to the locking position, locks the charging gun relative to the charging pile socket, so that the user cannot pull out the charging gun from the charging pile socket, in addition, the microcontroller can trigger the charging pile to generate a fault warning directly or via the charging pile main controller, the fault warning is uploaded to the background, so as to trigger a maintenance work order, so that the charging gun can be replaced or maintained.

[0061] The various technical features described above can be combined arbitrarily. Although all possible combinations of these technical features are not described, any combination of these technical features should be considered to be covered by the present description, as long as such a combination does not contradict.

[0062] Although the present application has been described in conjunction with the embodiments, those skilled in the art should understand that the above description and drawings are only exemplary and not limiting, and the present application is not limited to the disclosed embodiments. Various modifications and variations are possible without departing from the spirit of the present application.

Claims

1. A charging pile, characterized in that, The charging pile includes a charging pile socket, a charging gun and a resistance detection device, the charging gun has a plurality of terminals, the charging pile socket has a plurality of sockets for the plurality of terminals respectively, the resistance detection device is electrically connected to the charging pile socket and the charging gun, when the charging gun is inserted into the charging pile socket, a plurality of loops are formed between the charging pile socket and the charging gun, each loop is formed by one of the plurality of terminals in series connection with a corresponding socket through the resistance detection device, the resistance detection device is used for detecting a total resistance value of a remaining loop part in each loop in at least one loop except the resistance detection device, and outputting information indicating whether a detected total resistance value of a loop is greater than a corresponding threshold value.

2. The charging post of claim 1, wherein, The information includes an electrical signal indicating that the detected total resistance value of a loop is greater than a corresponding threshold value, and the charging pile further includes an electronic lock adapted to move between a locked position and an unlocked position, the resistance detection device is communicatively coupled with the electronic lock, and is used to output the electrical signal for moving the electronic lock to the locked position, wherein the electronic lock is in the locked position, the charging gun is locked to the charging pile socket, and the charging gun cannot be moved away from the charging pile socket.

3. The charging post of claim 2, wherein, The charging gun has a mechanical lock, the mechanical lock includes a rod-shaped body, and has a handle portion located at a proximal end of the rod-shaped body and a hook portion located at a distal end of the rod-shaped body, The charging pile socket has a recessed portion matched with the hook portion, when the charging gun is inserted into the charging pile socket, the hook portion is located in the recessed portion, the handle portion is adapted to be manipulated to move in a first direction to make the hook portion move out of the recessed portion in a second direction, Wherein, the electronic lock is positioned relative to the mechanical lock, so that when the electronic lock is in the locked position, the electronic lock prevents the movement of the handle portion in the first direction and / or the movement of the hook portion in the second direction.

4. The charging post of claim 3, wherein, The charging pile is a direct current charging pile, and the electronic lock is arranged on the charging gun, when the charging gun is inserted into the charging pile socket, when the electronic lock is in the locked position, the electronic lock abuts against the handle portion to prevent the movement of the handle portion in the first direction.

5. The charging post of claim 4, wherein, The direct current charging pile further includes a charging pile main controller, the resistance detection device is connected to the charging pile main controller, and is used to output the electrical signal to the charging pile main controller, and the charging pile main controller is connected to the electronic lock, and is used to provide an enable signal generated based on the electrical signal to the electronic lock.

6. The charging post of claim 4, wherein, The plurality of terminals includes a first terminal, a second terminal and a third terminal, the plurality of jacks includes a first jack, a second jack and a third jack for the first terminal, the second terminal and the third terminal respectively, the at least one loop includes a first loop formed by the first terminal connected in series with the corresponding first jack through the resistance detection device, a second loop formed by the second terminal connected in series with the corresponding second jack through the resistance detection device, and a third loop formed by the third terminal connected in series with the corresponding third jack through the resistance detection device, wherein the first terminal, the second terminal and the third terminal are direct current power positive (DC+) terminal, direct current power negative (DC-) terminal and protective earth (PE) terminal respectively.

7. The charging post of claim 3, wherein, The charging pile is an alternating current charging pile, and the electronic lock is arranged on the charging pile socket. When the charging gun is inserted into the charging pile socket, when the electronic lock is in the locking position, the electronic lock abuts against the hook portion above the recess portion to prevent the movement of the hook portion in the second direction.

8. The charging station of claim 7, wherein, The resistance detection device is directly connected to the electronic lock through a circuit.

9. The charging station of claim 7, wherein, The plurality of terminals includes a fourth terminal, a fifth terminal and a sixth terminal, the plurality of jacks includes a fourth jack, a fifth jack and a sixth jack for the fourth terminal, the fifth terminal and the sixth terminal respectively, the at least one loop includes a fourth loop formed by the fourth terminal connected in series with the corresponding fourth jack through the resistance detection device, a fifth loop formed by the fifth terminal connected in series with the corresponding fifth jack through the resistance detection device, and a sixth loop formed by the sixth terminal connected in series with the corresponding sixth jack through the resistance detection device, wherein the fourth terminal, the fifth terminal and the sixth terminal are alternating current power (L) terminal, neutral line (N) terminal and protective earth (PE) terminal respectively.

10. The charging station according to any one of claims 1-9, characterized in that, The resistance detection device includes a voltage source, an ammeter and a switch device connected in series, and includes a microcontroller, the switch device includes at least one switch for controlling the conduction and disconnection of the at least one loop, the microcontroller is connected to the at least one switch for controlling the disconnection and closure of the at least one switch, the voltage source is used to provide voltage in the currently closed loop of the at least one loop, the ammeter is used to detect the current in the currently closed loop of the at least one loop, and the microcontroller is connected to the ammeter for receiving the current detected by the ammeter and outputting the information.

11. The charging station of claim 10, wherein, The resistance detection device further includes a current limiting resistor connected in series with the voltage source, the ammeter and the switch device. The resistance detection device further includes a current limiting resistor connected in series with the voltage source, the ammeter and the switch device.

Images