Output interface module and energy storage all-in-one machine

Abstract

The embodiment of the utility model discloses an output interface module and an energy storage all-in-one machine, the output interface module comprises a switch module, an AC interface, a control module and a sampling module, and the switch module is provided with an input end, an output end and a control end; the AC interface is connected with the output end and is used for being connected with a power grid in a grid-connected mode or being connected with a load in an off-grid mode; the control module is connected with the control end and used for controlling on-off of the switch module. The sampling module is connected with the AC interface and the control module and is used for detecting voltage and current of the AC interface; when the sampling module detects that the voltage of the alternating current interface is the mains supply voltage and the control module receives a grid-connected instruction, the control module controls the switch module to be switched on; when the sampling module detects that the voltage of the AC interface is zero and the control module receives an off-grid instruction, the control module controls the switch module to be switched on. The alternating current interface can be selectively connected with a power grid or a load, so that the cost of the output interface module is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage equipment, and in particular to an output interface module and an integrated energy storage device. Background Art

[0002] The integrated energy storage device usually has off-grid and grid-connected functions. In the related art, the integrated energy storage device has two output interfaces, which correspond to the off-grid interface and the grid-connected interface respectively. When the integrated energy storage device is in the off-grid state, the off-grid interface is turned on, and when the integrated energy storage device is in the grid-connected state, the grid-connected interface is turned on. However, it is costly for the device to have two output interfaces at the same time. Utility Model Content

[0003] The embodiment of the present application provides an output interface module and an integrated energy storage device, which has only one output interface, thereby reducing costs.

[0004] In the first aspect, an embodiment of the present application provides an output interface module, including a switch module, an AC interface, a control module and a sampling module, wherein the switch module has an input end, an output end and a control end; the AC interface is connected to the output end, and is used to connect to the power grid in the grid-connected mode or to connect to the load in the off-grid mode; the control module is connected to the control end, and is used to control the on and off of the switch module; the sampling module is connected to the AC interface and the control module, and is used to detect the voltage and current of the AC interface; wherein, when the sampling module detects that the voltage of the AC interface is the mains voltage, and the control module receives a grid-connected instruction, the control module controls the switch module to turn on; when the sampling module detects that the voltage of the AC interface is zero, and the control module receives an off-grid instruction, the control module controls the switch module to turn on.

[0005] The AC interface of the embodiment of the present application can selectively connect to a power grid or a load, so that one interface can selectively support both off-grid and grid-connected modes, thereby reducing the cost of the output interface module and reducing the size of the output interface module.

[0006] In a second aspect, an embodiment of the present application provides an integrated energy storage device, including an output interface module, a rectifier module and a power generation module, wherein the rectifier module is connected to the input end and is used to rectify direct current into alternating current; the power generation module is connected to the rectifier module. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0008] Figure 1 This is a block diagram of an output interface module in one embodiment of the present application;

[0009] Figure 2 It is a block diagram of an output interface module in another embodiment of the present application;

[0010] Figure 3 This is a schematic diagram of the structure of an AC interface in an embodiment of the present application;

[0011] Figure 4 This is a circuit diagram of an output interface module in one embodiment of the present application;

[0012] Figure 5 A block diagram of an integrated energy storage device in one embodiment of the present application.

[0013] Description of reference numerals: 100, output interface module; 110, switch module; 120, AC interface; 121, panel; 122, conductive spring; 130, control module; 131, processor; 132, control circuit; 1321, power supply circuit; 1322, switch circuit; 140, sampling module; 150, operation module; 160, indication module; 170, filter module; D1, diode; C1, first capacitor; Q1, MOS tube; R1, first resistor;

[0014] R2, second resistor; C2, second capacitor; L1, common mode inductor; C3, third capacitor; C4, fourth capacitor; C5, fifth capacitor; 200, energy storage device; 210, rectifier module; 220, battery module; 230, power generation module. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0016] like Figure 1 As shown, a first aspect of an embodiment of the present application provides an output interface module 100 , and the output interface module 100 includes a switch module 110 , an AC interface 120 , a control module 130 and a sampling module 140 .

[0017] The switch module 110 has an input end, an output end and a control end. The input end is used to receive electric energy, the output end is used to output electric energy, and the control end is used to control the conduction or disconnection (referred to as "on and off") of the switch module 110. By controlling the on and off of the switch module 110, it is possible to control whether the switch module 110 supplies power to the outside. The type of the switch module 110 can be a power switch, so as to achieve isolation of the internal power and the AC interface 120. The switch module 110 can be illustratively a relay. When the working coil of the relay is turned on, the relay is energized, and the corresponding contacts are turned on or off.

[0018] The AC interface 120 is connected to the output end, and the AC interface 120 is selectively connected to the power grid or the load. Specifically, in the grid-connected mode, the AC interface 120 is connected to the power grid to connect the corresponding electric energy to the power grid for power supply, and in the off-grid mode, the AC interface 120 is connected to the load to power the load. It can be understood that the output voltage of the AC interface 120 when connected to the power grid can be the same as or different from the output voltage when connected to the load. In terms of connection method, the AC interface 120 is exemplarily connected to the power grid or the load through a plug, and connection or disconnection is achieved by plugging and unplugging, which is relatively convenient and quick to operate.

[0019] The sampling module 140 is connected to the AC interface 120 and the control module 130, and is used to detect the voltage and current of the AC interface 120, and transmit the detected voltage data and current data to the control module 130. The voltage data and current data detected by the sampling module 140 can be used as a basis for determining whether to connect to the grid or go off the grid, and can also be used to monitor the output power of the AC interface 120.

[0020] The control module 130 is connected to the control end, and the control module 130 is used to control the on and off of the switch module 110. It can be understood that the grid-connected mode means that the AC interface 120 is connected to the grid for power supply, and the off-grid mode means that the AC interface 120 is connected to the load and supplies power to the load. Therefore, if you want to switch between the grid-connected mode and the off-grid mode, you first need to stop the output interface module 100 to the grid or load, and then re-select to enter the grid-connected mode or the off-grid mode. The output interface module 100 stops outputting to the grid or the load, which can be done by disconnecting the AC interface 120 from the grid or the load, or by disconnecting the switch module 110.

[0021] For example, the current AC interface 120 is in the grid-connected mode, and the AC interface 120 is connected to the grid. If it is necessary to switch to the off-grid mode, the AC interface 120 needs to be disconnected from the grid first, and then the AC interface 120 needs to be connected to the load. Since the output of the AC interface 120 is interrupted, the output mode may change, so the switch module 110 needs to be disconnected to reselect the output mode. At this time, if the sampling module 140 detects that the voltage of the AC interface 120 is zero, it means that the AC interface 120 is successfully disconnected from the grid, and when the control module 130 receives the off-grid instruction, it can control the switch module 110 to turn on. If the sampling module 140 detects that the AC interface 120 is energized, it means that the AC interface 120 is not disconnected from the grid, and when the control module 130 receives the off-grid instruction, it cannot control the switch module 110 to turn on.

[0022] The AC interface 120 is currently in the off-grid mode, and the AC interface 120 is connected to the load. If it is necessary to switch to the grid-connected mode, the AC interface 120 needs to be disconnected from the load first, and then the AC interface 120 needs to be connected to the grid. At this time, if the sampling module 140 detects that the voltage of the AC interface 120 is the mains voltage, it means that the AC interface 120 is connected to the grid, and the control module 130 can control the switch module 110 to turn on when receiving the grid-connected instruction. If the sampling module 140 detects that the voltage of the AC interface 120 is zero or other voltages, it means that the AC interface 120 is not connected to the grid, and the control module 130 cannot control the switch module 110 to turn on when receiving the off-grid instruction.

[0023] In summary, the AC interface 120 of the embodiment of the present application can selectively connect to the power grid or the load, and one interface can realize two modes, thereby reducing the cost of the output interface module 100 and reducing the volume of the output interface module 100. Moreover, the embodiment of the present application detects the voltage data of the AC interface 120 through the sampling module 140, and determines whether it can be connected to the grid or off the grid through the voltage data and the current data, so as to avoid timely correction when the user selects the wrong mode, thereby avoiding accidents and improving safety.

[0024] like Figure 1As shown, in some embodiments, the output interface module 100 also includes an operation module 150, the operation module 150 is connected to the control module 130, and the operation module 150 is used to issue a grid-connected instruction or an off-grid instruction. The operation module 150 can be a button type, for example, a single click of the button issues a grid-connected instruction, and a double click of the button issues an off-grid instruction. Alternatively, the operation module 150 can be a toggle type, for example, a toggle upward issues a grid-connected instruction, and a toggle downward issues an off-grid instruction. Alternatively, the operation module 150 can be a knob type, for example, a grid-connected instruction is issued when it is rotated to the first position, and an off-grid instruction is issued when it is rotated to the second position. It should be noted that when the operation module 150 issues a grid-connected instruction or an off-grid instruction, it means that the output interface module 100 requests to enter the grid-connected mode or the off-grid mode, and it does not mean that the output interface module 100 will definitely enter the grid-connected mode or the off-grid mode, and it also needs to be determined in combination with the voltage data of the AC interface 120. If the voltage data meets the corresponding requirements, the grid-connected mode or off-grid mode will be entered. If the voltage data does not meet the corresponding requirements, the grid-connected or off-grid mode will not be performed to protect the equipment and personal safety.

[0025] like Figure 2 As shown, in some alternative embodiments, the operation module 150 is connected to the sampling module 140 but not to the control module 130. The sampling module 140 detects the operation signal of the operation module 150 and sends the operation signal to the control module 130. That is, the operation module 150 is connected to the control module 130 through the sampling module 140, thereby reducing the pin occupancy of the control module 130.

[0026] like Figure 1-Figure 2 As shown, in some embodiments, the output interface module 100 also includes an indication module 160, which is connected to the control module 130, and the indication module 160 is used to indicate that the output interface module 100 is currently in an off-grid state or a grid-connected state. The indication module 160 can be an indicator light, and the indicator light displays different colors, representing different modes. For example, when the indicator light is yellow, it means that the output interface module 100 is in a grid-connected mode, and when the indicator light is red, it means that the output interface module 100 is out of an off-grid mode. Alternatively, the flashing of the indicator light represents different modes, for example, when the indicator light is off, it means that the output interface module 100 is in a grid-connected mode, and when the indicator light is on, it means that the output interface module 100 is out of an off-grid mode. Alternatively, when the indicator light is always on, it means that the output interface module 100 is in a grid-connected mode, and when the indicator light flashes, it means that the output interface module 100 is out of an off-grid mode.

[0027] It should be noted that the indicator light can also be used as a warning indicator light. For example, when the operation module 150 issues a grid connection instruction, but the voltage data of the AC interface 120 is zero, the grid connection is not performed at this time, and the indicator light issues an alarm prompt, such as the warning light flashes quickly and changes color. Alternatively, when the load demand power is greater than the maximum output power of the AC interface 120, the output interface module 100 starts the protection program, automatically stops the output, and the indicator light issues an alarm prompt.

[0028] like Figure 3 As shown, in some embodiments, the AC interface 120 includes a panel 121 and a conductive spring 122 disposed in the panel 121, the conductive spring 122 is connected to the output end, and the conductive spring 122 can be connected to the socket. Exemplarily, the AC interface 120 can be a three-hole socket, and the three sockets of the three-hole socket are a neutral wire hole, a live wire hole, and a ground wire hole. For some small household appliances with plastic shells, such as table lamps, hair dryers, electric fans, etc., a two-hole socket can be used. For refrigerators, water heaters, desktop computers, etc., a three-hole socket is required. The three-hole socket has a wider adaptability and higher safety.

[0029] The operation module 150 and the indication module 160 are both disposed on the panel 121, thereby improving the integration of the AC interface 120, the operation module 150 and the indication module 160 and reducing the volume of the output interface module 100. Moreover, when switching modes, the user often needs to connect the AC interface 120, press the operation module 150, and observe the indication module 160, so integrating the AC interface 120, the operation module 150 and the indication module 160 together is also convenient for the user's operation and observation.

[0030] When the operation module 150 is connected to the control module 130 through the sampling module 140, the sampling module 140 is connected to the operation module 150 and the AC interface 120, and the operation module 150 and the AC interface 120 are integrated together, which can shorten the line length and make wiring simpler.

[0031] like Figure 1-Figure 2 As shown, in some embodiments, the control module 130 includes a processor 131 and a control circuit 132. The processor 131 is connected to the sampling module 140. The processor 131 can determine whether to close the switch module 110 according to the voltage data of the AC interface 120. The control circuit 132 is connected to the processor 131 and the input end of the switch module 110. The energy of the electrical signal sent by the processor 131 is small and insufficient to drive the switch module 110 to operate. Therefore, the control circuit 132 needs to be set. The control circuit 132 has enough energy to drive the switch module 110 to operate, that is, the processor 131 controls the switch module 110 to be turned on or off through the control circuit 132.

[0032] like Figure 4As shown, in some embodiments, the control end includes a positive control end and a negative control end, and the control circuit 132 includes a power supply circuit 1321 and a switch circuit 1322. When the switch module 110 is a relay, the positive control end and the negative control end are the two ends of the electromagnet of the relay.

[0033] The power supply circuit 1321 is connected to the positive control terminal, and the power supply circuit 1321 is used to supply power to the positive control terminal. The switch circuit 1322 is connected between the negative control terminal and the ground, and the switch circuit 1322 is connected to the processor 131, and the processor 131 can control the on and off of the switch circuit 1322. Exemplarily, when the switch circuit 1322 is turned on, the positive control terminal and the negative control terminal have current, and the switch module 110 is turned on. When the switch circuit 1322 is turned off, the positive control terminal and the negative control terminal lose current, and the switch module 110 is turned off.

[0034] like Figure 4 As shown, in some embodiments, the power supply circuit 1321 includes a diode D1 and a first capacitor C1, the positive electrode of the diode D1 is connected to the power supply terminal VCC, the negative electrode is connected to the positive control terminal, the first end of the first capacitor C1 is connected to the power supply terminal, and the second end of the first capacitor C1 is grounded. The diode D1 is used for rectification, and the first capacitor C1 is used for filtering to provide stable direct current to the positive control terminal.

[0035] The switch circuit 1322 includes a MOS tube Q1, a first resistor R1, and a second resistor R2. The source of the MOS tube Q1 is connected to the negative control terminal, the drain is grounded, the gate is connected to the first end of the first resistor R1, the second end of the first resistor R1 is connected to the processor 131, and the two ends of the second resistor R2 are respectively connected to the gate and drain of the MOS tube Q1. The first resistor R1 and the second resistor R2 are used for voltage division to reduce the control voltage output by the processor 131 to a voltage suitable for controlling the MOS tube Q1 to avoid damaging the MOS tube Q1. The processor 131 is connected to the pin 1 of the MOS tube Q1. The control voltage output by the processor 131 can control the on and off of the MOS tube Q1. After the MOS tube Q1 is turned on, the current flows from the power supply terminal VCC through the diode D1, the pin 6 of the relay RLY2, the pin 1 of the relay RLY2, the pin 2 of the MOS tube Q1, and the pin 3 of the MOS tube Q1 to the ground, and the control loop of the relay RLY2 is turned on, and the relay RLY2 can act. After the MOS tube Q1 is turned off, the control loop of the relay RLY2 is turned off.

[0036] like Figure 1-Figure 2 As shown, in some embodiments, the output interface module 100 further includes a filter module 170, which is connected between the output end and the AC interface 120 and is used to filter the AC power at the output end so that the output AC power has less noise and is purer.

[0037] like Figure 4 As shown, in some embodiments, the input end of the switch module 110 includes a positive input end and a negative input end, the output end includes a positive output end and a negative output end, and the filter module 170 includes a second capacitor C2, a common-mode inductor L1, a third capacitor C3, a fourth capacitor C4 and a fifth capacitor C5.

[0038] The second capacitor C2 is used to filter the current output from the output end, and the first end of the second capacitor C2 is connected to the positive output end, and the second end of the second capacitor C2 is connected to the negative output end. The common mode inductor L1 is used to suppress common mode interference, for example, suppressing the interference of the neutral line and the live line to the ground. The common mode inductor L1 includes a first winding and a second winding, the first end of the first winding is connected to the first end of the second capacitor C2, and the first end of the second winding is connected to the second end of the second capacitor C2. The third capacitor C3 is used to filter the current output from the common mode inductor L1, the first end of the third capacitor C3 is connected to the second end of the first winding, and the second end of the third capacitor C3 is connected to the second end of the second winding. The fourth capacitor C4 is used to filter the live line, the first end of the fourth capacitor C4 is connected to the live line of the AC interface 120, and the second end of the fourth capacitor C4 is connected to the ground line of the AC interface 120. The fifth capacitor C5 is used to filter the neutral line. A first end of the fifth capacitor C5 is connected to the ground line of the AC interface 120 , and a second end of the fifth capacitor C5 is connected to the neutral line of the AC interface 120 .

[0039] like Figure 5 As shown, the second aspect of the embodiment of the present application provides an integrated energy storage device 200, which includes an output interface module 100, a rectifier module 210 and a power generation module.

[0040] The power generation module is connected to the rectifier module 210, and the power generation module is used to generate electricity, and the electric energy generated by the power generation module is transmitted to the rectifier module 210. The power generation module can be exemplarily a photovoltaic panel, a wind turbine generator, etc.

[0041] The rectifier module 210 is connected to the input end of the switch module 110, and is used to rectify the DC power into AC power, and then transmit the AC power to the switch module 110. When the switch module 110 is closed, the AC interface 120 supplies power to the outside, and when the switch module 110 is disconnected, the AC interface 120 stops supplying power to the outside.

[0042] When the grid is powered, the energy storage integrated machine 200 can be in the grid-connected mode, and the power generation module generates electricity for the grid. When the grid is powered off, the energy storage integrated machine 200 can be switched to the off-grid mode, and the power generation module generates electricity for the load.

[0043] Since the probability of a power outage in the power grid is relatively low, the energy storage integrated machine 200 is in the grid-connected mode in most cases, and only needs to be switched to the off-grid mode in very rare cases. Therefore, although the energy storage integrated machine 200 of the present application needs to manually switch the AC interface 120 to connect to the grid or the load when switching modes, in actual use, since the probability of mode switching is low, setting the AC interface 120 will not significantly increase the complexity of the operation, but setting a single AC interface 120 can support both off-grid and grid-connected modes, which can reduce costs and make the internal structure simpler.

[0044] like Figure 5 As shown, in some embodiments, the energy storage integrated machine 200 further includes a battery module 220, which can store or release electrical energy, thereby playing a role in regulation. For example, when the power demand of the power grid (or load) is less than the power generation power of the power generation module, the excess power of the power generation module can be stored in the battery module 220. When the power demand of the power grid (or load) is greater than the power generation power of the power generation module, the battery module 220 can provide additional power to the power grid (or load).

[0045] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0046] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An output interface module, characterized in that: include: A switch module having an input terminal, an output terminal and a control terminal; An AC interface connected to the output end, used to connect to the grid in the grid-connected mode or to connect to the load in the off-grid mode; A control module, connected to the control end, for controlling the on and off of the switch module; A sampling module, connected to the AC interface and the control module, and used to detect the voltage of the AC interface; Among them, when the sampling module detects that the voltage of the AC interface is the AC voltage and the control module receives a grid-connected instruction, the control module controls the switch module to turn on; when the sampling module detects that the voltage of the AC interface is zero and the control module receives an off-grid instruction, the control module controls the switch module to turn on.

2. The output interface module according to claim 1, characterized in that: The output interface module also includes: An operation module is connected to the control module or the sampling module, and is used to issue the grid connection instruction or the grid-off instruction.

3. The output interface module according to claim 2, characterized in that: The output interface module also includes: The indication module is connected to the control module and is used to indicate whether the output interface module is currently in the off-grid mode or the on-grid mode.

4. The output interface module according to claim 3, characterized in that: The AC interface includes a panel and a conductive spring arranged in the panel, the conductive spring is connected to the output end, and the operation module and the indication module are both arranged on the panel.

5. The output interface module according to claim 1, characterized in that: The control module comprises: A processor connected to the sampling module; A control circuit is connected to the processor and the input end, and the processor controls the on or off of the switch module through the control circuit.

6. The output interface module according to claim 5, characterized in that: The control terminal includes a positive control terminal and a negative control terminal, and the control circuit includes: A power supply circuit, connected to the positive control terminal, for supplying power to the positive control terminal; The switch circuit is connected between the negative control terminal and the ground, and is connected to the processor, and the processor can control the on or off of the switch circuit.

7. The output interface module according to claim 6, characterized in that: The power supply circuit includes a diode and a first capacitor, the anode of the diode is connected to the power supply end, the cathode of the diode is connected to the anode control end, the first end of the first capacitor is connected to the power supply end, and the second end of the first capacitor is grounded; The switch circuit includes a MOS tube, a first resistor and a second resistor, wherein the source of the MOS tube is connected to the negative control terminal, the drain is grounded, the gate is connected to the first end of the first resistor, the second end of the first resistor is connected to the processor, and the two ends of the second resistor are respectively connected to the gate and the drain of the MOS tube.

8. The output interface module according to claim 1, characterized in that: The output interface module also includes: The filter module is connected between the output end and the AC interface and is used for filtering the AC power at the output end.

9. The output interface module according to claim 8, characterized in that: The input end of the switch module includes a positive input end and a negative input end, the output end of the switch module includes a positive output end and a negative output end, and the filter module includes: A second capacitor, wherein a first end of the second capacitor is connected to the positive output end, and a second end of the second capacitor is connected to the negative output end; A common mode inductor, comprising a first winding and a second winding, wherein a first end of the first winding is connected to a first end of the second capacitor, and a first end of the second winding is connected to a second end of the second capacitor; a third capacitor, wherein a first end of the third capacitor is connected to the second end of the first winding, and a second end of the third capacitor is connected to the second end of the second winding; a fourth capacitor, wherein a first end of the fourth capacitor is connected to the live wire of the AC interface, and a second end of the fourth capacitor is connected to the ground wire of the AC interface; A fifth capacitor, wherein a first end of the fifth capacitor is connected to a ground line of the AC interface, and a second end of the fifth capacitor is connected to a neutral line of the AC interface.

10. An integrated energy storage device, characterized in that: include: The output interface module according to any one of claims 1 to 9; A rectifier module, connected to the input end, for rectifying direct current into alternating current; and The power generation module is connected to the rectifier module.

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