Load control device and system
By designing load control devices and systems, and using detection modules and control modules to control the AC switch module, controllable power supply to household loads is achieved, which solves the problem of inability to supply power according to the power grid status in the existing technology and meets the dynamic charging needs of household loads. .
Patent Information
- Application Number
- CN202323470527.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-19
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2033-12-19
AI Technical Summary
The prior art cannot achieve controllable power supply to home loads based on the power grid status, especially in the case of insufficient power capacity or power grid outage, which makes it difficult to meet the charging needs of household appliances and equipment.
A load control device and system are designed, including a control module, a detection module and an AC switch module. The detection module detects the electrical signal on the preset AC bus through the sampling unit and metering chip. The control module controls the on and off of the AC switch module based on the detection signal to realize power supply to the preset AC load and charging and discharging equipment.
It realizes controllable power supply to household loads and can dynamically adjust power supply according to the status of the power grid to meet the charging needs of household electrical equipment. Especially when the power grid is out of power, it can quickly switch power supply to ensure the normal operation of the load.
Smart Images
Figure CN222381340U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of circuit control, and in particular, to a load control device and system. Background Art
[0002] With the popularity of electric vehicles, electric vehicles are no longer simply a means of transportation. Most electric vehicles have a vehicle to load (V2L) function, which converts the power of the battery pack into 220V AC power for home appliances. In the case of insufficient power capacity or power outage, in order to meet the charging needs of home appliances and cooperate with the discharge function of the electric vehicle AC port, how to discharge the household load through the electric vehicle is a problem that needs to be solved.
[0003] At present, the existing technology is usually based on electric vehicles directly discharging household loads. Since the energy exchange between electric vehicles and the power grid is uncontrollable, it is impossible to power household loads according to the state of the power grid. Utility Model Content
[0004] The purpose of the present application is to provide a load control device and system to address the deficiencies in the above-mentioned prior art, so that the control module in the load control device controls the on and off of the AC switch module according to the detection signal of the detection module, thereby realizing power supply to the preset AC load and charging and discharging equipment.
[0005] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:
[0006] In a first aspect, an embodiment of the present application provides a load control device, the load control device comprising: a control module, a detection module, and an AC switch module, wherein the AC switch module comprises: a first switch unit and a second switch unit;
[0007] The input end of the detection module is connected to a preset AC bus, the output end of the detection module is connected to the control module, the control module is also connected to the control end of the first switch unit, the first switch unit is connected to the second switch unit, the second switch unit is connected in series on the preset AC bus, the input end of the detection module is also connected to one end of the second switch unit, and the other end of the second switch unit is connected to a preset AC load and a charging and discharging device.
[0008] In an optional implementation, the AC switch module includes: the first switch unit includes: a first relay; the second switch unit includes: a second relay;
[0009] One end of the first relay is connected to one of the preset AC busbars, the other end of the first relay is connected to the other of the preset AC busbars through the coil of the second relay, and the contacts of the second relay are respectively connected to the two busbars of the preset AC busbars;
[0010] The control end of the first relay is the control end of the AC switch module, so as to be connected to the control module.
[0011] In an optional implementation, the contact of the first relay is a normally closed contact, and the contact of the second relay is a normally open contact.
[0012] In an optional implementation, the state detection point of the second relay is also connected to the control module.
[0013] In an optional embodiment, the detection module includes: a sampling unit and a metering chip;
[0014] The sampling unit is connected to the preset AC bus, and the sampling unit is also connected to the control module through the metering chip.
[0015] In an optional embodiment, the sampling unit includes: a voltage sensor and a current sensor, wherein the input end of the voltage sensor and the input end of the current sensor are both connected to the preset AC bus, and the output end of the voltage sensor and the output end of the current sensor are connected to the metering chip.
[0016] In an optional implementation, the load control device further includes: a communication module, the communication module is used to communicate with the charging and discharging equipment, and the communication module is also connected to the control module.
[0017] In an optional embodiment, the load control device further includes: a power supply module, a first input end of the power supply module is connected to the preset AC bus, a second input end of the power supply module is also connected to the charging and discharging device, and an output end of the power supply module is connected to the control module.
[0018] In a second aspect, an embodiment of the present application further provides a load control system, the load control system comprising: a charging and discharging device, a load control device;
[0019] The charging and discharging equipment is connected to a preset AC bus, and the load control device is connected to the preset AC bus. The load control device is any load control device described in the first aspect above.
[0020] In an optional implementation, the charging and discharging equipment is communicatively connected to the load control device.
[0021] The beneficial effects of this application are:
[0022] The present application provides a load control device and system. The load control device includes: a control module, a detection module, and an AC switch module, wherein the AC switch module includes: a first switch unit and a second switch unit; the input end of the detection module is connected to a preset AC bus, the output end of the detection module is connected to the control module, the control module is also connected to the control end of the first switch unit, the first switch unit is connected to the second switch unit, the second switch unit is connected in series on the preset AC bus, the input end of the detection module is also connected to one end of the second switch unit, and the other end of the second switch unit is connected to a preset AC load and a charging and discharging device. The control module in the load control device can control the conduction and disconnection of the first switch unit and the second switch unit in the AC switch module according to the detection signal of the detection module, so as to realize the power supply to the preset AC load and the charging and discharging device. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0024] Figure 1 A schematic diagram of the structure of a load control device provided in an embodiment of the present application;
[0025] Figure 2 A schematic diagram of the structure of another load control device provided in an embodiment of the present application;
[0026] Figure 3 A schematic diagram of the structure of a load control system provided in an embodiment of the present application.
[0027] Description of main component symbols: 100-load control device; 110-control module; 120-detection module; 121-metering chip; 122-voltage sensor; 123-current sensor; 130-AC switch module; 131-first switch unit; 132-second switch unit; K1-first relay; K2-second relay; 140-communication module; 150-interface; 160-power supply module; 200-charging and discharging equipment; 300-preset AC load. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.
[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0030] In the description of the present application, it should be noted that if the terms "upper", "lower", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0031] In addition, the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0032] It should be noted that, in the absence of conflict, the features in the embodiments of the present application may be combined with each other.
[0033] The load control device provided in the present application is specifically described below through multiple examples in conjunction with the accompanying drawings.
[0034] Figure 1 A schematic diagram of the structure of a load control device provided in an embodiment of the present application; Figure 1 As shown, the load control device 100 includes: a control module 110 , a detection module 120 , and an AC switch module 130 , wherein the AC switch module 130 includes: a first switch unit 131 and a second switch unit 132 .
[0035] The input end of the detection module 120 is connected to the preset AC bus, the output end of the detection module 120 is connected to the control module 110, the control module 110 is also connected to the control end of the first switch unit 131, the first switch unit 131 is connected to the second switch unit 132, the second switch unit 132 is connected in series to the preset AC bus, the input end of the detection module 120 is also connected to one end of the second switch unit 132, and the other end of the second switch unit 132 is connected to the preset AC load 300 and the charging and discharging device 200.
[0036] Specifically, the preset AC bus may be a bus of a preset power grid, and the preset power grid provides power to the preset AC load 300 and the charging and discharging device 200 through the preset AC bus. The input end of the detection module 120 is connected to the preset AC bus, and the detection module 120 is used to detect electrical signals on the preset AC bus, including: voltage signals, current signals, etc.
[0037] The output end of the detection module 120 is connected to the control module 110, and the detected electrical signal can be transmitted to the control module 110. The control module 110 controls the first switch unit 131 according to the received electrical signal. Since the first switch unit 131 is connected to the second switch unit 132, and the second switch unit 132 is connected in series to the preset AC bus, one end of the second switch unit 132 is connected to the input end of the detection module, and the other end of the second switch unit 132 is connected to the preset AC load 300 and the charging and discharging device 200, then according to the control signal of the control module 110 to the first switch unit 131, the switching states of the first switch unit 131 and the second switch unit 132 are controlled, so as to control the conduction and shutdown of the preset AC bus according to the switching state of the second switch unit 132. When the second switch unit 132 is turned on, power is provided to the preset AC load 300 and the charging and discharging device 200 through the preset AC bus. When the second switch unit 132 is turned off, power cannot be provided to the preset AC load 300 and the charging and discharging device 200 through the preset AC bus.
[0038] Among them, the preset AC load 300 can be the user's electrical equipment, and the charging and discharging device 200 is an AC charging pile, which supplies power to the user's electrical equipment and the charging vehicle connected to the charging and discharging device 200 through the preset AC bus.
[0039] Figure 2 A schematic diagram of the structure of another load control device provided in an embodiment of the present application; Figure 2 As shown, the first switch unit 131 includes: a first relay K1; the second switch unit 132 includes: a second relay K2.
[0040] One end of the first relay K1 is connected to one of the preset AC busbars, and the other end of the first relay K1 is connected to another of the preset AC busbars through the coil of the second relay K2. The contacts of the second relay K2 are respectively connected to the two busbars on the preset AC busbar.
[0041] The control end of the first relay K1 is the control end of the AC switch module 130 to be connected to the control module 110 .
[0042] Wherein, the preset AC bus may include two busbars, namely, a live line L and a neutral line N. If one end of the first relay K1 is connected to one of the preset AC busbars as the live line L, the other end of the first relay K1 is connected to another busbar in the preset AC busbar as the neutral line N through the coil of the second relay K2; if one end of the first relay K1 is connected to one of the preset AC busbars as the neutral line N, the other end of the first relay K1 is connected to another busbar in the preset AC busbar as the live line L through the coil of the second relay K2;
[0043] The first relay K1 can be a weak current relay, and the second relay K2 can be an electromagnetic relay. The second relay K2 includes two sets of contacts, the first set of contacts is connected to the live wire L of the preset AC bus, and the second set of contacts is connected to the neutral wire N of the preset AC bus.
[0044] Optionally, the contact of the first relay K1 is a normally closed contact, and the contact of the second relay K2 is a normally open contact.
[0045] Since the contacts of the first relay K1 are normally closed contacts, when the preset AC bus is energized, the first relay K1 is in the on state. Since the other end of the first relay K1 is connected to the coil of the second relay K2, the coil of the second relay K2 is energized, so that the contacts of the second relay K2 are closed, and power can be provided to the preset AC load 300 and the charging and discharging device 200 through the preset AC bus.
[0046] In addition, the control module 110 is connected to the control end of the first relay K1. When the preset AC bus is powered off, the control module 110 controls the first relay K1 to turn off. Since the other end of the first relay K1 is connected to the coil of the second relay K2, the coil of the second relay K2 is disconnected, so that the contacts of the second relay K2 are disconnected, and power cannot be provided to the preset AC load 300 and the charging and discharging device 200 through the preset AC bus.
[0047] Optionally, the state detection point of the second relay K2 is also connected to the control module 110 .
[0048] The state detection point of the second relay K2 may be the coil of the second relay K2 or the contact of the second relay K2. The control module 110 may determine whether the second relay K2 is in a closed state or an open state according to feedback from the state detection point.
[0049] Continue to refer Figure 2 The detection module 120 includes: a sampling unit and a metering chip 121. The sampling unit is connected to a preset AC bus, and the sampling unit is also connected to the control module 110 through the metering chip 121.
[0050] Optionally, the sampling unit includes: a voltage sensor 122 and a current sensor 123 , wherein the input end of the voltage sensor 122 and the input end of the current sensor 123 are both connected to a preset AC bus, and the output end of the voltage sensor 122 and the output end of the current sensor 123 are connected to a metering chip 121 .
[0051] Specifically, the voltage sensor 122 is used to collect the voltage signal on the preset AC bus, and transmit the collected voltage signal to the control module 110 through the metering chip 121. The current sensor 123 is used to collect the current signal on the preset AC bus, and transmit the collected current signal to the control module 110 through the metering chip 121.
[0052] Continue to refer Figure 2 The load control device 100 further includes: a communication module 140 , the communication module 140 is used to communicate with the charging and discharging device 200 , and the communication module 140 is also connected to the control module 110 .
[0053] Among them, the communication module 140 can be a wireless communication module or a wired communication module, which is used to communicate with the charging and discharging device 200. When the communication module 140 is a wired communication module, the wired communication between the control module 110 and the charging and discharging device 200 is realized through the communication module 140 and the communication pins in the interface 150. When the communication module 140 is a wireless communication module, the control module 110 communicates wirelessly with the charging and discharging device 200.
[0054] Continue to refer Figure 2 The load control device 100 also includes: a power supply module 160 , a first input end of the power supply module 160 is connected to a preset AC bus, a second input end of the power supply module 160 is also connected to the charging and discharging device 200 , and an output end of the power supply module 160 is connected to the control module 110 .
[0055] Specifically, when the preset power grid has power, the voltage output by the preset power grid is converted into 12V through the power supply module 160, and power is supplied to the control module 110. When the preset power grid is powered off, the charging and discharging device 200 outputs a 12V voltage to the power supply module 160 through the power pin in the interface 150, so that the power supply module 160 supplies power to the control module 110.
[0056] The embodiment of the present application also provides two working modes of a load control device 100. The first working mode is a charging mode. When the preset power grid has electricity, that is, the preset AC bus has electricity, the voltage output by the preset power grid is converted to 12V through the power supply module 160, and power is supplied to the control module 110. Since the contact of the first relay K1 is a normally closed contact, the first relay K1 is in a conducting state, so that the coil of the second relay K2 is attracted, and the contact of the second relay K2 connected to the preset AC bus is closed. The preset AC bus can supply power to the preset AC load 300 and the charging and discharging device 200. At the same time, the control module 110 communicates with the charging and discharging device 200 through the communication module 140 and sends a signal prohibiting the use of external discharge. In addition, the control module 110 can obtain the voltage signal and current signal on the preset AC bus through the detection module 120, determine the power consumption of the preset AC load 300, and dynamically adjust the charging power of the charging and discharging device 200, so as to limit the power.
[0057] The second working mode is the discharge mode. When the preset power grid is powered off, that is, the preset AC bus is powered off, the charging and discharging device 200 outputs a 12V voltage to the power supply module 160 through the power pin in the interface 150, so that the power supply module 160 supplies power to the control module 110. The control module 110 controls the first relay K1 in the AC switch module 130 to be disconnected, so that the coil of the second relay K2 is disconnected, and the contact of the second relay K2 connected to the preset AC bus is disconnected. The preset AC bus cannot supply power to the preset AC load 300 and the charging and discharging device 200. At the same time, the control module 110 communicates with the charging and discharging device 200 through the communication module 140, and sends a signal for operating and using external discharge, so that the charging and discharging device 200 supplies power to the preset AC load 300. In addition, when the preset power grid resumes power supply, the control module 110 in the load control device 100 communicates with the charging and discharging device 200 through the communication module 140, and sends a signal for prohibiting the use of external discharge. At the same time, the charging and discharging device 200 periodically requests the control module 110 for the current preset power grid state to determine whether to discharge externally.
[0058] In summary, the embodiment of the present application provides a load control device, including: a control module, a detection module, and an AC switch module, wherein the AC switch module includes: a first switch unit and a second switch unit; the input end of the detection module is connected to a preset AC bus, the output end of the detection module is connected to the control module, the control module is also connected to the control end of the first switch unit, the first switch unit is connected to the second switch unit, the second switch unit is connected in series on the preset AC bus, the input end of the detection module is also connected to one end of the second switch unit, and the other end of the second switch unit is connected to a preset AC load and a charging and discharging device. The control module in the load control device can control the conduction and disconnection of the first switch unit and the second switch unit in the AC switch module according to the detection signal of the detection module, so as to realize the power supply to the preset AC load and the charging and discharging device.
[0059] Figure 3 A schematic diagram of a load control system provided in an embodiment of the present application; Figure 3 As shown, the load control system includes: a charging and discharging device 200 and a load control device 100 .
[0060] The charging and discharging device 200 is connected to a preset AC bus, and the load control device 100 is connected to the preset AC bus. The load control device 100 is the above Figure 1-Figure 2 A load control device 100 is described.
[0061] Optionally, the charging and discharging device 200 is communicatively connected to the load control device 100 .
[0062] The load control device 100 is also connected to a preset AC bus through a preset electric meter, and the preset electric meter is used to count the power consumption of the preset AC load 300. The load control device 100 communicates with the charging and discharging device 200 through the communication module 140, and the communication method can be a local area network method such as CAN bus communication, WIFI, LORA, etc. The load control device 100 detects the preset AC bus electrical signal through the detection module 120, thereby determining the state of the preset power grid. When the preset power grid has power, the control module 110 communicates with the charging and discharging device 200 through the communication module 140, and sends a signal prohibiting the use of external discharge. The preset AC bus can supply power to the preset AC load 300 and the charging and discharging device 200; when the preset power grid is powered off, the control module 110 communicates with the charging and discharging device 200 through the communication module 140, and sends a signal for operating and using external discharge. Then, the charging and discharging device 200 supplies power to the preset AC load 300, so that the load control system can quickly switch the power supply to the preset AC load 300 when the preset power grid is powered off, thereby ensuring the normal operation of the preset AC load 300.
[0063] It should be noted that the load control device 100 has an abnormal opening protection function. After the load control device 100 is installed in the load control system, if the load control device 100 is opened privately, the load control system will enter a protection state, and at the same time, the charging and discharging equipment 200 will stop charging and discharging functions.
[0064] The charging and discharging device 200 is also connected to the preset AC busbar through a control switch, and the control switch is the circuit breaker and leakage protection of the charging and discharging device 200. The charging and discharging device 200 discharges to the vehicle with the AC port discharge function, and the charging and discharging device 200 is connected to the load control device for communication. When the operation and use external discharge signal is received, the charging and discharging device 200 is powered.
[0065] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A load control device, characterized in that: The load control device comprises: a control module, a detection module, and an AC switch module, wherein the AC switch module comprises: a first switch unit and a second switch unit; The input end of the detection module is connected to a preset AC bus, the output end of the detection module is connected to the control module, the control module is also connected to the control end of the first switch unit, the first switch unit is connected to the second switch unit, the second switch unit is connected in series on the preset AC bus, the input end of the detection module is also connected to one end of the second switch unit, and the other end of the second switch unit is connected to a preset AC load and a charging and discharging device.
2. The device according to claim 1, characterized in that The first switch unit includes: a first relay; the second switch unit includes: a second relay; One end of the first relay is connected to one of the preset AC busbars, the other end of the first relay is connected to the other of the preset AC busbars through the coil of the second relay, and the contacts of the second relay are respectively connected to the two busbars of the preset AC busbars; The control end of the first relay is the control end of the AC switch module, so as to be connected to the control module.
3. The device according to claim 2, characterized in that The contact of the first relay is a normally closed contact, and the contact of the second relay is a normally open contact.
4. The device according to claim 2, characterized in that The state detection point of the second relay is also connected to the control module.
5. The device according to claim 1, characterized in that The detection module includes: a sampling unit and a metering chip; The sampling unit is connected to the preset AC bus, and the sampling unit is also connected to the control module through the metering chip.
6. The device according to claim 5, characterized in that The sampling unit comprises: a voltage sensor and a current sensor, wherein the input end of the voltage sensor and the input end of the current sensor are both connected to the preset AC bus, and the output end of the voltage sensor and the output end of the current sensor are connected to the metering chip.
7. The device according to claim 1, characterized in that The load control device further includes: a communication module, which is used for communication connection with the charging and discharging equipment, and the communication module is also connected to the control module.
8. The device according to claim 7, characterized in that The load control device further includes: a power supply module, a first input end of the power supply module is connected to the preset AC bus, a second input end of the power supply module is also connected to the charging and discharging device, and an output end of the power supply module is connected to the control module.
9. A load control system, characterized in that: The load control system includes: charging and discharging equipment and a load control device; The charging and discharging equipment is connected to a preset AC bus, and the load control device is connected to the preset AC bus. The load control device is the load control device described in any one of claims 1 to 8.
10. The system according to claim 9, characterized in that The charging and discharging equipment is communicatively connected to the load control device.