AC input control device

Abstract

An alternating-current input control device comprises a relay group which is connected with an external charging module and comprises a plurality of relays, and each relay is provided with a control end used for controlling on-off of an alternating-current circuit and a feedback contact used for feeding back the actual on-off state; the AC input interface is used for receiving external AC power; the control module is connected with the control power supply and controls the on-off of the AC circuit according to a preset control logic or an external instruction; the feedback module is connected with a feedback contact of the relay group and is used for monitoring the actual on-off state of the relay group and feeding back the state information to the control module or external equipment; the communication interface module is used for data transmission and exchange with external equipment. According to the alternating current input control device, the on-off of the relay group is controlled through the communication between the control module and the charging mainboard, a traditional alternating current contactor is replaced, the internal installation space of a charging pile is saved, the cost is reduced, and the independent control of each branch of the charging module is realized at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of alternating current power supply control especially relates to an alternating current input control device. BACKGROUND

[0002] With the rapid development and wide application of power electronics technology, alternating current input control devices play a crucial role in various power systems and automation control fields. Especially in occasions that require precise control of alternating current power on-off, such as electric vehicle charging stations, energy storage systems, industrial production lines, etc., the performance and reliability of alternating current input control devices are directly related to the operation efficiency and safety of the entire system.

[0003] Traditional alternating current input control devices mostly use simple mechanical switches or single relays to realize circuit on-off control. Although these methods are simple and easy to implement, they often seem inadequate when faced with complex and variable application scenarios. For example, in electric vehicle charging stations, it is necessary to dynamically adjust the charging current and voltage according to the real-time state of the battery, charging demand, and load conditions of the power grid, etc. However, traditional control methods cannot meet this demand.

[0004] In addition, with the rise of smart grid and Internet of Things technology, higher requirements are placed on alternating current input control devices. On the one hand, the device is required to be able to realize remote monitoring and control in order to timely obtain the running state and fault information of the equipment and perform remote maintenance and management; on the other hand, the device is required to have stronger data processing and communication capabilities in order to exchange data and work cooperatively with other devices in the smart grid.

[0005] In order to overcome the shortcomings of traditional alternating current input control devices and meet the new demands of modern power systems and automation control fields, the utility model proposes an alternating current input control device that realizes precise control of alternating current power supply and improves the safety, flexibility, and user experience of the device. SUMMARY

[0006] To achieve the above technical effects, the utility model proposes the following technical solutions:

[0007] An alternating current input control device, comprising:

[0008] A relay group connected with an external charging module, the relay group containing several relays, each relay being provided with a control end for controlling the on-off of an alternating current circuit and a feedback contact for feeding back the actual on-off state;

[0009] An alternating current input interface for receiving an external alternating current power supply;

[0010] A control module is connected with a control power supply, and controls the on-off of an alternating current circuit by controlling the control end of a relay according to a preset control logic or external instruction.

[0011] A feedback module is connected with the feedback contact of the relay group, and is used for monitoring the actual on-off state of the relay group and feeding back the state information to the control module or external equipment.

[0012] A communication interface module is used for data transmission exchange with external equipment.

[0013] Preferably, the control module further comprises a fault detection module connected with the control module, which judges whether there is a fault according to the comparison result of the actual on-off state of the relay group and the control instruction, and sends a fault alarm information to the external equipment through the communication interface when a fault is detected.

[0014] Preferably, a plurality of line splitters are further included, and the line splitters are connected with the relay group respectively.

[0015] Preferably, the control module further comprises a timing control module, which automatically adjusts the on-off state of the relay group according to a preset time table, so as to realize the function of timing charging or power-off.

[0016] Preferably, the alternating current input interface further comprises a detection module connected with the control module.

[0017] Preferably, a display module connected with the control module is further included.

[0018] The utility model discloses an alternating current input control device, and the on-off of the relay group is controlled through the communication of the control module and the charging mainboard, the traditional alternating current contactor is replaced, the internal installation space of the charging pile is saved, the independent control of each branch of the charging module is realized while reducing the cost, has greater heat dissipation area, and the temperature rise is lower, and the loss is low, each branch can be independently controlled, only the module that needs to use is powered, especially in the charging pile system with more modules, the loss is lower. ACCOUT OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will make a simple introduction to the drawings needed to be used in the embodiment or prior art description, and obviously, the following described drawings are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without paying creative labor.

[0020] Figure 1 It is the structural schematic diagram of the utility model alternating current input control device.

[0021] Figure 2 The utility model discloses an AC input control device's control logic schematic diagram. DETAILED DESCRIPTION

[0022] The technical scheme of the utility model will be described clearly and completely in connection with the drawings, and obviously, the described embodiments are only part of the embodiments of the utility model, not all. Based on the embodiments of the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the protection scope of the utility model.

[0023] In combination Figure 1 As shown in the figure, an AC input control device comprises:

[0024] A relay group is connected with an external charging module, and the relay group comprises a plurality of relays, each of which is provided with a control end for controlling the on-off of an AC circuit and a feedback contact for feeding back the actual on-off state; the relays in the relay group are designed with high reliability, and have the characteristics of high temperature resistance, moisture resistance and electromagnetic interference resistance, so as to ensure stable work in harsh environments. The number of relays corresponding to the number of branches to be controlled is configured, and each relay is provided with an auxiliary feedback contact; the control and feedback of the relays are connected with a control module, so that the control module can control the closing / opening of each relay and obtain the actual state.

[0025] An AC input interface is used for receiving an external AC power supply.

[0026] A control module is connected with a control power supply, and according to a preset control logic or external instruction, the control end of the relay is controlled to control the on-off of the AC circuit; when receiving the control instruction sent by the external device through the communication interface, the instruction content is analyzed, and the on-off state of the relay group is controlled according to the instruction requirement. Passive dry contact input, when the input is on, all relays are closed, and when the input is off, all relays are opened.

[0027] A feedback module is connected with the feedback contact of the relay group, and is used for monitoring the actual on-off state of the relay group and feeding back the state information to the control module or external device.

[0028] The communication interface module is used for data transmission and exchange with external devices, supports RS485, CAN and other communication modes, is used for data transmission with external devices (such as charging mainboards, monitoring systems and the like), and includes receiving external control instructions and sending device state information. The communication interface is in the form of RS485 or CAN communication, in addition to being able to control and collect the state of the relay group through the control module and the feedback module, it can also be connected through the communication interface to realize more functions, such as individual control of each branch and actual state collection of each relay.

[0029] Preferably, the control module further comprises a fault detection module connected with the control module, which judges whether there is a fault according to the comparison result of the actual on-off state of the relay group and the control instruction, and sends a fault alarm information to the external device through the communication interface when a fault is detected. After the on-off operation is performed, the actual on-off state of the relay group is monitored in real time through the feedback module, and is compared with the state required by the instruction to confirm whether the operation is successful. It also has a fault classification function, which can distinguish different types of faults and send specific fault type information to the external device.

[0030] Preferably, it further comprises a plurality of line splitters, each of which is connected with a relay group, and the line splitter is connected with the AC input interface, which is used to distribute the external AC power signal to a plurality of relays in the relay group or other circuits that need to be independently controlled, to realize parallel processing or distribution of the signal to different loads.

[0031] Preferably, the control module further comprises a timing control module, which automatically adjusts the on-off state of the relay group according to a preset schedule to realize the function of timing charging or power-off.

[0032] Preferably, the AC input interface further comprises a detection module connected with the control module, the detection module comprises a voltage detection and current detection module, which is used to monitor the input voltage and current in real time, and to close the relay group through the control module when an abnormal value (such as overvoltage, undervoltage, overcurrent, etc.) is detected, to protect the subsequent circuit and equipment.

[0033] Preferably, it further comprises a display module connected with the control module, which is used to display the current on-off state of the relay group, input voltage, current and other key parameters, and to receive user input control instructions or setting parameters.

[0034] As shown in Figure 2 , the communication module receives instructions and passes them to the control module, while the detection module detects the working state of the relay group and feeds it back to the control module, which makes a judgment according to the instructions whether the relay group needs to be turned on or off:

[0035] 1) if yes, then control the corresponding module on-off, the detection module detects again whether the on-off is successful, if yes, then end; if not, then feedback to the control module and detect the relay group working state again;

[0036] 2) if no, then detect again the relay group working state.

[0037] The control module of the device is connected with the charging mainboard through a communication interface, and the state of the module is mastered in real time according to the feedback of the total feedback line, when the charging mainboard needs to turn on or off the module, the on-off state of all modules is acquired through the control module first, then the instruction of the switch module is sent according to the charging demand, the information of the charging mainboard is received by the control module, the relay group is turned on or off through the total control, the state of the relay group is controlled in real time, and the mainboard is convenient to judge whether the on-off is normal.

[0038] Obviously, the above embodiments are only part of the embodiments of the present application, rather than all the embodiments. The above embodiments are only used for explaining the present application, and do not constitute the limitation on the protection scope of the present application. Based on the above embodiments, all other embodiments obtained by the person skilled in the art without creative labor, that is, all modifications, equivalent replacements and improvements, etc. made within the spirit and principles of the present application, fall within the protection scope of the present application.

Claims

1. An alternating current input control device, characterized by The application relates to a relay group connected with an external charging module, wherein the relay group comprises a plurality of relays, each of which is provided with a control end for controlling the on-off state of an alternating current circuit and a feedback contact for feeding back the actual on-off state. An alternating current input interface is arranged for receiving an external alternating current power supply. A control module is connected with a control power supply, and according to a preset control logic or external instruction, the control module controls the on-off state of the alternating current circuit by controlling the control end of the relay. A feedback module is connected with the feedback contact of the relay group, and is used for monitoring the actual on-off state of the relay group and feeding back the state information to the control module or external equipment. A communication interface module is arranged for data transmission exchange with external equipment. The control module further comprises a fault detection module connected with the control module.

2. The AC input control device of claim 1, wherein A plurality of line splitters are connected with the relay group respectively.

3. The AC input control device of claim 1, wherein ​

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