Emergency stop remote reset circuit of charging pile
By employing interlocking circuits and self-resetting emergency stop buttons in charging piles, remote restoration of the charging pile's emergency stop status is achieved, solving the problem of requiring manual reset of traditional charging pile emergency stop buttons and improving operation and maintenance efficiency and safety.
Patent Information
- Application Number
- CN202520374897.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-03-05
AI Technical Summary
When the emergency stop button on a charging station is pressed, it needs to be manually reset, which results in a large manpower investment for maintenance personnel, affects the service quality of the charging station, and wastes resources.
An interlocking circuit is formed by the first and second relays to achieve dynamic maintenance and efficient remote recovery of the charging pile's emergency stop state. The fault state is cleared by a self-resetting emergency stop button and remote commands.
This reduces the need for on-site operations by maintenance personnel, improves the safety of charging piles and the convenience of maintenance work, and ensures the safety and controllability of the system.
Smart Images
Figure CN223778218U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of charging station control, specifically relates to a charging pile emergency stop remote reset circuit. BACKGROUND
[0002] With the continuous popularity of new energy technology, the number of electric vehicles continues to grow, and the demand for charging is
[0003] Also more and more, the number of charging stations is increasing, and the following problems exist when the electric vehicle is charging: when the owner finishes charging, many owners will feel that it is more troublesome to end the charging on the mobile app or the host, so the owner will directly choose to press the emergency stop button on the charging pile to stop charging, or the owner will mispress the emergency stop button when charging, and so on. When the electric vehicle encounters an emergency, the emergency stop button needs to be pressed, but most owners do not have electrical professional knowledge and will forget to restore after pressing the emergency stop button.
[0004] When the charging station background reports the charging pile emergency stop button action failure, the maintenance personnel will go to the corresponding charging pile to perform manual reset, so that the charging pile can continue to work; however, if the charging station does not have a monitoring background,
[0005] Only when the next user uses it to find the failure can it be repaired or the maintenance personnel on-site inspection can find it to be processed.
[0006] After the traditional emergency stop button is pressed, manual reset is needed, and each time reset needs to be performed manually, which causes the artificial input of the maintenance personnel to be too large, seriously affects the service quality of the charging station, and causes serious waste of resources. UTILITY MODEL CONTENT
[0007] The utility model discloses a kind of charging pile emergency stop remote reset circuits, interlocking circuit is formed by the first relay and the second relay of being set, the dynamic maintenance of charging pile emergency stop state and efficient remote recovery are realized, to solve the problem that charging station emergency stop button cannot be automatically reset in background technology, needs to rely on manual reset.
[0008] To achieve the above purpose, the utility model adopts the following technical scheme:
[0009] The utility model discloses a kind of charging pile emergency stop remote reset circuits, including emergency stop button, first relay and second relay;
[0010] The normally closed contact of the first relay is connected in series into the contactor loop in charging pile, the coil side of first relay is connected with the negative pole of external power supply, and the other side is connected into the contact loop of emergency stop button;
[0011] One side of the second relay coil is connected with the positive pole of the external power supply, and the other side is connected with the contact of the emergency stop button, wherein the normally open contact of the second relay forms an interlocking loop with the coil of the first relay and the contact of the emergency stop button.
[0012] As a further improvement, the emergency stop button is a self-resetting button.
[0013] As a further improvement, the contactor loop includes the N line of the AC contactor coil and the N line loop of the control panel.
[0014] As a further improvement, the other set of contacts of the second relay is connected with the charging pile fault reporting system for feeding back the emergency stop state.
[0015] As a further improvement, when the first relay coil is powered on, its normally closed contact is disconnected, cutting off the N line loop of the AC contactor coil and the control panel.
[0016] As a further improvement, when the second relay coil is powered on, its normally open contact is closed, maintaining the power-on state of the first relay coil and realizing interlocking.
[0017] As a further improvement, after the emergency stop button is reset, the charging function is not directly restored, and a remote instruction is required to remove the fault state.
[0018] As a further improvement, the remote instruction cuts off the power supply of the negative pole of the external power supply, so that the first relay coil loses power, and its normally closed contact restores to closed to restore the charging.
[0019] As a further improvement, the first relay and the second relay are small-sized medium-power relays.
[0020] As a further improvement, the external power supply is a DC 12V power supply.
[0021] Compared with the prior art, the utility model has the following technical effects:
[0022] The utility model of charge pile original self -locking type emergency stop button is replaced for the self -reset type emergency stop button, makes the button after triggering automatic reset to the normally open state, and through the construction interlocking circuit design of first relay and second relay, when emergency stop triggers, first relay coil makes normally closed contact break, cuts off charge pile main circuit and control panel signal, second relay coil synchronously gets electricity, its normally open contact closes and forms independent interlocking power supply, even if emergency stop button resets, first relay still gets electricity through second relay contact, ensures that the system still keeps the fault state after emergency stop button resets, avoids the risk of direct recovery due to misoperation, improves the security of charge pile, through the power of charge pile control panel is disconnected at a distance, makes first relay coil lose electricity, and its contact resets, thereby effectively eliminates the emergency stop fault state and remotely recovers normal charging function, so that the operation and maintenance personnel do not need to reach the scene manual operation, improves the convenience and response speed of operation and maintenance work. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is the schematic diagram of the utility model charge pile emergency stop remote reset circuit.
[0024] The sign: 1, first relay;2, second relay;3, emergency stop button. DETAILED DESCRIPTION
[0025] The embodiments of the application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the application, and cannot be understood as limiting the application. On the contrary, the embodiments of the application include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.
[0026] The embodiments of the application are described in detail below.
[0027] As Figure 1 The utility model discloses a charge pile emergency stop remote reset circuit for controlling the loop on-off of charge pile, including emergency stop button 3, first relay 1 and second relay 2, the normally closed contact of first relay 1 is connected in series in the contactor loop in charge pile, and the coil one side of first relay 1 is connected with the negative pole of external power supply, and the other side is connected in the contact loop of emergency stop button 3, the coil one side of second relay 2 is connected with the positive pole of external power supply, and the other side is connected with the contact of emergency stop button 3, wherein the normally open contact of second relay 2 and the coil of first relay 1 and the contact of emergency stop button 3 form interlocking loop.
[0028] The emergency stop button 3 in the embodiment is a self-resetting emergency stop button, and an IP65 protection level button can be selected, such as a product produced by Schneider, the contact capacity needs to meet AC 250V / 5A, the stroke of the emergency stop button 3 is 4-6mm, the triggering force is less than or equal to 5N, and fast response is supported. In the embodiment, the contact of the self-resetting emergency stop button is normally open, and the contact is closed after being pressed, and is automatically reset to the normally open state after being released.
[0029] Compared with the traditional self-locking emergency stop button, the system function is directly restored after physical reset, which may cause misoperation or safety hazards; in the embodiment, the first relay 1 and the second relay 2 are interlocked, so that the emergency stop button 3 still maintains the fault state even in the case of physical self-resetting, thereby ensuring the safety of operation; and the traditional emergency stop button 3 needs to be manually restored and reset on site, and the embodiment can restore the system to start charging through a remote instruction, thereby reducing the on-site operation demand and providing maintenance efficiency.
[0030] In the embodiment, the first relay 1 and the second relay 2 are small-sized medium-power relays, which are a kind of relays with moderate size and power handling capacity between small-sized low-power relays and high-power relays, can effectively save installation space, and are suitable for various coil voltages, and thus are suitable for the 12V power supply in the embodiment.
[0031] An Omron product can be selected, and the contact capacity needs to meet AC 250V / 5A.
[0032] Figure 1 As shown, the external power supply is a 12V power supply with a maximum current of 2A, and a remote control interface is provided to support the power-off 12V instruction.
[0033] In the embodiment, the first relay 1 circuit connection includes that one end of the coil is connected to the control panel 12V- output end, and the other end is connected in series with the contact of the emergency stop button 3; and the normally closed contact of the first relay 1 is connected in series with the N line loop of the coil of the AC contactor and the N line interface of the control panel.
[0034] In the embodiment, the second relay 2 connection includes that one end of the coil is connected to the control panel 12V+ output end, and the other end is connected to the contact of the emergency stop button 3; one end of the first group of normally open contacts of the second relay 2 is connected to the 12V- side of the coil of the first relay 1, and the other end is connected to the contact of the emergency stop button 3, thereby forming an interlocking loop.
[0035] The second relay 2 in the embodiment includes a second group of contacts, and the second group of contacts is connected to the fault feedback interface of the control panel for displaying the fault state; it needs to be noted that the group of contacts can be normally open contacts or normally closed contacts.
[0036] The coil of the first relay 1 and the second relay 2 and the contact circuit of the emergency stop button 3 are preferably optically coupled to prevent the control panel from being interfered by high voltage.
[0037] The interlocking mechanism of the utility model ensures that after the emergency stop button 3 is triggered, even if the emergency stop button 3 is physically reset, the system can still maintain a fault state until a remote recovery instruction is issued, through the cooperative work of the first relay 1 and the second relay 2.
[0038] Initial state:
[0039] The first relay 1: the coil loses power, the normally closed contact is closed, the N line of the AC contactor coil and the N line circuit of the control panel are normally conducted, and the charging pile can normally work.
[0040] The second relay 2: the coil loses power, the normally open contact is disconnected, and the interlocking circuit is not formed.
[0041] The emergency stop button 3: in the normally open state, not triggered.
[0042] Emergency stop trigger:
[0043] Press the emergency stop button 3, and the emergency stop button 3 contact changes from normally open to closed.
[0044] The first relay 1: the coil gets power, and the normally closed contact is disconnected, cutting off the N line circuit of the AC contactor coil and the control panel, and the charging pile stops working.
[0045] The second relay 2: the coil gets power, and the normally open contact is closed, forming an interlocking circuit. The interlocking circuit connects the coil of the first relay 1 and the other contact of the emergency stop button 3 through the normally open contact of the second relay 2, so that even if the emergency stop button 3 is physically reset (returns to the normally open state), the coil of the first relay 1 can still be continuously powered through the interlocking circuit.
[0046] System state: the emergency stop fault report is continuously effective, and the charging pile remains in a stopped state.
[0047] Emergency stop button 3 reset:
[0048] The emergency stop button 3 is physically reset, and the contact returns to the normally open state from the closed state.
[0049] The first relay 1: due to the interlocking circuit (the normally open contact of the second relay 2 is closed), the coil of the first relay 1 still maintains the power-on state, and the normally closed contact remains disconnected, so that the charging pile cannot resume work.
[0050] The second relay 2: the coil still gets power, and the normally open contact remains closed to maintain the interlocking circuit.
[0051] System state: the emergency stop fault state is continuous, and the charging pile still cannot work.
[0052] Remote recovery: remote instruction is issued to disconnect the 12V power supply of the charging pile control panel.
[0053] First relay 1: coil power loss, normally closed contact reset closed, AC contactor coil and control panel N line loop resume conduction.
[0054] Second relay 2: coil power loss, normally open contact reset open, interlock loop released.
[0055] System state: the charging pile returns to normal working state, and the emergency stop fault is removed.
[0056] The design of the utility model ensures that the system will not be misoperated due to physical reset of the emergency stop button 3 after triggering of the emergency stop button 3, and supports remote recovery, thereby improving the safety and controllability of the system.
[0057] In actual application of the structure of the embodiment, under the condition of 0 DEG C to 10 DEG C and humidity of 95%, the first relay 1 and the second relay 2 have stable action stability without abnormality.
[0058] When the simulated emergency stop button 3 is pressed, the system cuts off the output within 0.2 seconds, and the fault signal reporting delay is less than 50 ms; when the remote instruction is issued to the system for recovery, the average time consumption is 1.5 seconds, and the success rate reaches 99.8%.
[0059] Meanwhile, in the testing process, the device covers charging piles of different powers such as 7kW AC pile and 120kW DC pile, and all of them realize seamless compatibility.
[0060] It should be noted that in the description of the present application, the terms "first", "second" and the like are only used for the purpose of description and should not be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.
[0061] Any process or method described in the flowchart or otherwise described herein can be understood as representing a module, segment, or portion of code that includes executable instructions to implement a specific logical function or process, and the scope of the preferred embodiments of the present application includes additional implementations in which the functions are performed in an order different from that shown or discussed, including functions performed in a substantially simultaneous manner or in reverse order, which should be understood by those skilled in the art to which the embodiments of the present application belong.
[0062] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0063] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.
Claims
1. A charging pile emergency stop remote reset circuit, characterized in that, The emergency stop button, the first relay and the second relay are included. The normally closed contact of the first relay is connected in series in the contactor loop in the charging pile, one side of the coil of the first relay is connected with the negative pole of the external power supply, and the other side is connected with the contact loop of the emergency stop button. One side of the coil of the second relay is connected with the positive pole of the external power supply, and the other side is connected with the contact of the emergency stop button, wherein the normally open contact of the second relay and the coil of the first relay and the contact of the emergency stop button form an interlocking loop.
2. The charging pile emergency stop remote reset circuit according to claim 1, characterized in that, The emergency stop button is a self-resetting button.
3. The emergency stop remote reset circuit for a charging pile according to claim 1, characterized in that, The contactor loop includes the N line of the AC contactor coil and the N line loop of the control panel.
4. The charging pile emergency stop remote reset circuit according to claim 1, characterized in that, The other set of contacts of the second relay is connected with the charging pile fault reporting system, and is used for feeding back the emergency stop state.
5. The emergency stop remote reset circuit for a charging pile according to claim 1, characterized in that, When the coil of the first relay is powered, the normally closed contact is disconnected, and the N line loop of the AC contactor coil and the control panel is cut off.
6. The emergency stop remote reset circuit for a charging pile according to claim 1, characterized in that, When the coil of the second relay is powered, the normally open contact is closed, the power state of the coil of the first relay is maintained, and interlocking is realized.
7. The emergency stop remote reset circuit for a charging pile according to claim 1, characterized in that, After the emergency stop button is reset, the charging function is not directly restored, and the fault state needs to be removed through a remote instruction.
8. The charging pile emergency stop remote reset circuit according to claim 7, characterized in that, The remote instruction cuts off the power supply of the negative pole of the external power supply, so that the coil of the first relay loses power, the normally closed contact is restored to be closed, and the charging is restored.
9. The emergency stop remote reset circuit for a charging pile according to claim 1, characterized in that, The first relay and the second relay are small and medium power relays.
10. The emergency stop remote reset circuit for a charging pile according to claim 1, characterized in that, The external power supply is a DC 12V power supply.