Wall-mounted base, charging and discharging device, control method and system

Abstract

The invention discloses a wall-mounted base, a charging and discharging device and a control method and system. The wall-mounted base comprises a mains supply interface, a photovoltaic interface, a charging pile interface, a switching circuit and a control unit, the commercial power interface is used for being connected with a commercial power supply, the photovoltaic interface is used for being connected with a photovoltaic power supply, and the charging pile interface is used for being detachably connected with a portable charging pile; one end of the switching circuit is connected with the commercial power interface or the photovoltaic interface, and the other end of the switching circuit is connected with the charging pile interface; and the control unit is connected with the switching circuit and is used for controlling the switching circuit to connect a target power supply and the portable charging pile and carrying out charging and discharging control. The wall-mounted base can be used in cooperation with the portable charging pile, the photovoltaic power source and the commercial power source which are connected can conduct charging and discharging interaction with the portable charging pile or a charging and discharging device connected with the portable charging pile, photovoltaic charging, power storage and power supplement to a commercial power grid can be completed, and the wall-mounted base can adapt to optical storage and charging application scenes in an all-around mode.

Description

Technical Field

[0001] The present invention relates to the field of new energy charging technology, and in particular to a wall mount, a charging and discharging device, a control method and a system. Background Art

[0002] At present, new energy electric vehicles are increasingly recognized and welcomed by people. In order to meet the diverse and multi-scenario charging needs of new energy electric vehicles, in addition to traditional floor-standing charging piles, a variety of different forms of charging piles have also appeared on the market, such as movable portable charging piles.

[0003] However, the existing charging piles on the market have relatively simple functions. A single charging pile can only meet the application requirements of specific scenarios. There is no way to integrate charging and discharging, destination charging and portable charging, and home solar storage and charging applications on a single smart device, and it cannot fully adapt to solar storage and charging application scenarios. Summary of the invention

[0004] The embodiments of the present invention provide a wall mount, a charging and discharging device, a control method and a system to solve the problem that the existing charging piles have a single function and cannot fully adapt to the application scenarios of solar storage and charging.

[0005] An embodiment of the present invention provides a wall mount, including a mains interface, a photovoltaic interface, a charging pile interface, a switching circuit and a control unit; The mains interface is used to connect to a mains power supply, the photovoltaic interface is used to connect to a photovoltaic power supply, and the charging pile interface is used to be detachably connected to a portable charging pile; One end of the switching circuit is connected to the mains interface or the photovoltaic interface, and the other end of the switching circuit is connected to the charging pile interface; The control unit is connected to the switching circuit and is used to control the switching circuit to connect the target power supply and the portable charging pile and perform charging and discharging control; the target power supply is a mains power supply or a photovoltaic power supply.

[0006] Preferably, the control unit is used to connect to the photovoltaic power source through the photovoltaic interface, obtain the current output power and current output current of the photovoltaic power source, and when the current output power is less than the preset output power and / or the current output current is less than the preset output current, control the switching circuit to connect the AC power supply and the portable charging pile.

[0007] Preferably, the control unit is used to connect to the portable charging pile through the charging pile interface, to output charging and discharging instructions to the portable charging pile through the charging pile interface, and to control the switching circuit to connect the target power supply and the portable charging pile according to the charging and discharging start signal transmitted back by the portable charging pile, so as to realize charging and discharging control.

[0008] An embodiment of the present invention further provides a charging and discharging device, comprising a portable charging pile and a wall mount as described in any one of the above items; The portable charging pile includes a wall mount interface and a device interface; The portable charging pile is detachably connected to the charging and discharging device via the device interface, and is used to output the stored electric energy to the charging and discharging device; The wall mount is detachably connected to the portable charging pile via the wall mount interface, and is used to connect the target power source to the portable charging pile, and control the target power source to charge and discharge with the portable charging pile or the charging and discharging device.

[0009] Preferably, the portable charging station includes a communication unit; The communication unit is connected to the wall mount and the charging and discharging device, and is used to confirm the charging state or discharging state with the charging and discharging device according to the charging and discharging instructions output by the wall mount, and to feed back a charging and discharging start signal to the wall mount.

[0010] An embodiment of the present invention further provides a control method for a charging and discharging device, which is applied to any of the charging and discharging devices described above, and includes the following steps performed by a control unit: Obtain charging and discharging signals; If the charging and discharging signal is a charging signal, the target power source is controlled to supply power to a portable charging pile or a charging and discharging device according to a preset charging strategy; If the charge-discharge signal is a discharge signal, the portable charging pile or the charge-discharge device is controlled to supply power to the target power source according to a preset discharge strategy.

[0011] Preferably, controlling the target power source to supply power to the portable charging pile or the charging and discharging device according to the preset charging strategy includes: Outputting a charging instruction to the portable charging pile; A charging start signal fed back by the portable charging pile is obtained, and based on the charging start signal, a target power source is controlled to supply power to the portable charging pile or the charging and discharging device.

[0012] Preferably, the method of controlling the target power source to supply power to a portable charging pile or a charging and discharging device according to a preset charging strategy further includes: Obtain the current output power and the current output current; if the current output power is less than the preset output power; and / or the current output current is less than the preset output current, control the switching circuit to connect the AC power supply and the portable charging pile.

[0013] Preferably, controlling the portable charging pile or the charging and discharging device to supply power to the power supply according to the preset discharge strategy includes: Outputting a discharge instruction to the portable charging pile; A discharge start signal fed back by the portable charging pile is obtained, and based on the discharge start signal, the portable charging pile or the charging and discharging device is controlled to supply power to the power supply.

[0014] Preferably, before controlling the portable charging pile or the charging and discharging device to supply power to the power supply, the control method of the charging and discharging system further includes: The switching circuit is controlled to connect the mains power supply and the portable charging pile.

[0015] An embodiment of the present invention further provides a charging and discharging system, comprising a mains power supply, a photovoltaic power supply and any one of the charging and discharging devices described above, wherein the charging and discharging device can execute the control method of the charging and discharging device described above; The portable charging pile is used for detachable connection with the charging and discharging equipment.

[0016] The embodiment of the present invention provides a wall mount, a charging and discharging device, a control method and a system. The wall mount can be used in conjunction with a portable charging pile, and enables the connected photovoltaic power supply and mains power supply to interact with the portable charging pile or the charging and discharging equipment connected to the portable charging pile for charging and discharging. It can be networked with the portable charging pile, the mains power supply, the photovoltaic power supply and the charging and discharging equipment to form an integrated charging and discharging system of "light, storage and charging", which can complete photovoltaic charging, power storage and power supply to the mains power grid, overcome the shortcomings of the existing charging piles with single functions, and can fully adapt to the application scenarios of light storage and charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0018] Figure 1 is a schematic diagram of the block diagram of a charging and discharging system in one embodiment of the present invention; Figure 2 is a flow chart of a control method of a charge and discharge control device in one embodiment of the present invention; Figure 3 is another flow chart of a control method of a charge and discharge control device in one embodiment of the present invention; Figure 4 is another flow chart of a control method of a charge and discharge control device in one embodiment of the present invention.

[0019] In the figure: 1. Wall mount; 11. AC power interface; 12. Photovoltaic interface; 13. Charging pile interface; 14. Switching circuit; 15. Control unit; 16. Emergency stop unit; 2. Portable charging pile; 21. Wall mount interface; 22. Equipment interface; 23. Communication unit; 24. Energy storage module; 3. AC power supply; 4. Photovoltaic power supply; 5. Charging and discharging equipment; 6. Anti-theft device. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention 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 invention and are not used to limit the present invention.

[0021] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] An embodiment of the present invention provides a wall mount 1, including a mains power interface 11, a photovoltaic interface 12, a charging pile interface 13, a switching circuit 14 and a control unit 15; the mains power interface 11 is used to connect a mains power supply 3, the photovoltaic interface 12 is used to connect a photovoltaic power supply 4, and the charging pile interface 13 is used to be detachably connected to a portable charging pile 2; one end of the switching circuit 14 is connected to the mains power interface 11 or the photovoltaic interface 12, and the other end of the switching circuit 14 is connected to the charging pile interface 13; the control unit 15 is connected to the switching circuit 14, and is used to control the switching circuit 14 to connect the target power supply and the portable charging pile 2, and to perform charging and discharging control; the target power supply is the mains power supply 3 or the photovoltaic power supply 4.

[0024] As an example, the wall mount 1 is used to be fixedly installed on a wall or a column at the target charging location, and is used to be detachably connected to a portable charging pile 2. The portable charging pile 2 can be a portable charging pile 2 with energy storage and discharge functions, which can be used alone as an energy storage portable charging pile 2, or can be plugged into the wall mount 1 and used as a fixed charging pile. The wall mount 1 includes a mains interface 11, a photovoltaic interface 12, a charging pile interface 13, a switching circuit 14 and a control unit 15. The mains interface 11 is used to connect the mains power supply 3, the photovoltaic interface 12 is used to connect the photovoltaic power supply 4, and the charging pile interface 13 can be set on the fixed female seat of the wall mount 1, and the fixed female seat can be detachably connected to the fixed male seat on the portable charging pile 2, so that the charging pile interface 13 is electrically connected to the connection interface of the fixed male seat; one end of the switching circuit 14 is connected to the mains interface 11 or the photovoltaic interface 12, and the other end of the switching circuit 14 is connected to the charging pile interface 13. The control unit 15 is connected to the switching circuit 14, and is used to use one of the photovoltaic power source 4 and the mains power source 3 as the target power source, and control the switching circuit 14 to connect the target power source and the portable charging pile 2, so that the target power source can be charged and discharged with the portable charging pile 2, or the target power source can be charged and discharged with the charging and discharging device 5 (such as a new energy electric vehicle) connected to the portable charging pile 2 through the portable charging pile 2.

[0025] The wall mount 1 in this example can be plugged in with the portable charging pile 2, and enables the connected photovoltaic power source 4 and the mains power source 3 to interact with the portable charging pile 2 or the charging and discharging device 5 connected to the portable charging pile 2 for charging and discharging. It can be networked with the portable charging pile 2, the mains power source 3, the photovoltaic power source 4 and the charging and discharging device 5 to form an integrated charging and discharging system of "light, storage and charging", which can complete photovoltaic charging, power storage and power replenishment to the mains power grid, overcomes the shortcomings of the existing charging piles with single functions, and can fully adapt to light storage and charging application scenarios.

[0026] In one embodiment, the control unit 15 is used to connect to the photovoltaic power source 4 through the photovoltaic interface 12, obtain the current output power and current output current of the photovoltaic power source 4, and when the current output power is less than the preset output power and / or the current output current is less than the preset output current, control the switching circuit 14 to connect the AC power supply 3 and the portable charging pile 2.

[0027] As an example, the control unit 15 can be connected to the photovoltaic power source 4 through the photovoltaic interface 12, obtain the current output power and current output current of the inverter of the photovoltaic power source 4, and determine the target power source according to the current output power and current output current. Specifically, when the discharge is turned on, the control unit 15 defaults to the photovoltaic power source 4 as the target power source, and when it is detected that the load capacity of the photovoltaic power source 4 reaches the lower limit according to the obtained current output power and current output current, the control unit 15 controls the mains power source 3 as the target power source. Specifically, the control unit 15 may include an MCU and a load balancing control circuit connected to the MCU, and the load balancing control circuit is connected to the photovoltaic power source 4 through the photovoltaic interface 12 to obtain the current output power and current output current of the photovoltaic power source 4. When the current charging power is less than the preset power and / or the current charging current is less than the preset charging current, the MCU can use the mains power source 3 as the target power source, and control the switching circuit 14 to switch the mains power source 3 and the portable charging pile 2 for power supply.

[0028] As another example, the control unit 15 can also use the AC power supply 3 as the target power supply before controlling the portable charging pile 2 or the charging and discharging device 5 to discharge the target power supply, and control the switching circuit 14 to switch the AC power supply 3 and the portable charging pile 2, so that the portable charging pile 2 or the charging and discharging device 5 discharges the AC power supply 3 to replenish the AC power grid.

[0029] In one embodiment, the control unit 15 is used to connect to the portable charging pile 2 through the charging pile interface 13, to output charging and discharging instructions to the portable charging pile 2 through the charging pile interface 13, and to control the switching circuit 14 to connect the target power supply and the portable charging pile 2 according to the charging and discharging start signal transmitted back by the portable charging pile 2, so as to realize charging and discharging control.

[0030] As an example, the control unit 15 is also used to connect to the portable charging pile 2 through the charging pile interface 13, and to output charging and discharging instructions to the portable charging pile 2 through the charging pile interface 13. After receiving the charging and discharging instructions, if the portable charging pile 2 is not connected to the charging and discharging device 5 (such as a new energy electric vehicle), the portable charging pile 2 only needs to confirm the plug-in status between itself and the wall mount 1, and determine whether charging and discharging can be performed according to the current temperature. When confirming that the plug-in is completed and charging and discharging can be performed, the charging and discharging start signal is fed back to the wall mount 1; if the portable charging pile 2 is connected to the charging and discharging device 5, the portable charging pile 2 also needs to communicate with the charging and discharging device 5 to obtain the charging and discharging response status of the charging and discharging device 5, and when it is determined that the charging and discharging device 5 is ready for charging and discharging according to the charging and discharging response status, the charging and discharging start signal is fed back to the wall mount 1. After receiving the charge and discharge start signal, the control unit 15 in the wall mount 1 controls the switching circuit 14 to connect the target power supply and the portable charging pile 2. When it is confirmed that the connection between the portable charging pile 2 and the target power supply is completed and charging and discharging can be performed, the target power supply is controlled to charge and discharge with the portable charging pile 2 or the charging and discharging device 5.

[0031] Specifically, the control unit 15 may include a charging pile communication circuit connected to the MCU, and the charging pile communication circuit is connected to the communication module in the portable charging pile 2 through the charging pile interface 13, and can output charging and discharging instructions to the portable charging pile 2, or obtain the charging and discharging start signal sent back by the portable charging pile 2. The control unit 15 may also include a magnetic switch identification circuit and a single bus temperature acquisition circuit connected to the MCU to identify the pull-in state of the magnetic switch at the plug-in point of the wall mount 1 and the portable charging pile 2, detect the current temperature of the fixed mother seat on the wall mount 1, and determine whether the wall mount 1 and the portable charging pile 2 are connected, whether charging and discharging can be performed in the current state, etc. according to the pull-in state of the magnetic switch and the current temperature of the fixed mother seat.

[0032] In one embodiment, the wall mount 1 also includes an emergency stop unit 16; the emergency stop unit 16 is connected to the connection node between the charging pile interface 13 and the switching circuit 14, and is used to disconnect the connection between the charging pile interface 13 and the switching circuit 14, and is also used to output an emergency stop signal to the portable charging pile 2 to stop the portable charging pile 2 from charging and discharging.

[0033] As an example, the wall mount 1 also includes an emergency stop unit 16 arranged inside the wall mount 1. The emergency stop unit 16 may include an emergency stop button arranged on the wall mount 1 and an emergency stop circuit arranged inside the wall mount 1 and connected to the connection node between the charging pile interface 13 and the switching circuit 14. The emergency stop circuit is used to obtain an emergency stop signal when the emergency stop button is pressed, and disconnect the connection between the charging pile interface 13 and the switching circuit 14 according to the emergency stop signal, so as to achieve the effect of emergency stop control.

[0034] As another example, the emergency stop circuit can also be connected to the portable charging pile 2 through the charging pile interface 13. When the emergency stop signal is obtained, the emergency stop signal is transmitted to the portable charging pile 2, so that the portable charging pile 2 can cut off the connection with the charging and discharging device 5 according to the emergency stop signal, thereby realizing the synchronous emergency stop of the charging and discharging process between the portable charging pile 2 and the charging and discharging device 5.

[0035] An embodiment of the present invention also provides a charging and discharging device, comprising a portable charging pile 2 and a wall mount 1 in any of the above embodiments; the portable charging pile 2 comprises a wall mount interface 21 and a device interface 22; the portable charging pile 2 is detachably connected to the charging and discharging device 5 through the device interface 22, and is used to output the stored electrical energy to the charging and discharging device 5; the wall mount 1 is detachably connected to the portable charging pile 2 through the wall mount interface 21, and is used to connect the target power supply to the portable charging pile 2, and control the target power supply to charge and discharge with the portable charging pile 2 or the charging and discharging device 5.

[0036] As an example, the charging and discharging device includes a portable charging pile 2 and a wall mount 1 in any of the above examples. The portable charging pile 2 includes a wall mount interface 21 and a device interface 22. The wall mount interface 21 may include a fixed male connector, which is used to plug into a fixed female connector on the wall mount 1 to achieve a detachable connection between the portable charging pile 2 and the wall mount 1. The device interface 22 is used to connect to the charging and discharging device 5 through a charging gun or a transmission line to achieve a detachable connection between the portable charging pile 2 and the charging and discharging device 5.

[0037] The portable charging pile 2 is provided with an energy storage module 24 for storing electric energy, so that the portable charging pile 2 can charge the charging and discharging device 5 when it is only connected to the charging and discharging device 5; when the portable charging pile 2 is only plugged into the wall mount 1, the wall mount 1 can control the charging and discharging between the target power supply and the portable charging pile 2 according to the charging and discharging signal, thereby storing electric energy and replenishing power to the power grid in reverse; when the portable charging pile 2 is plugged into the wall mount 1 and the charging and discharging device 5 at the same time, the portable charging pile 2 can obtain the charging and discharging response status of the charging and discharging device 5 according to the charging and discharging instruction, and feedback the charging and discharging start signal to the wall mount 1, so that the wall mount 1 can control the charging and discharging between the target power supply and the charging and discharging device 5, thereby charging the charging and discharging device 5 using the photovoltaic power supply 4 or the AC power supply 3, and replenishing power to the power grid from the charging and discharging device 5.

[0038] In this example, the charging and discharging device can integrate photovoltaic charging, charging pile energy storage and reverse grid power replenishment functions by providing a detachable wall mount 1 and a portable charging pile 2 with energy storage function. It can be networked with a mains power supply 3, a photovoltaic power supply 4 and a charging and discharging device 5 to form an integrated "light, storage and charging" charging and discharging system, overcoming the shortcomings of the existing charging piles with a single function and being able to fully adapt to light storage and charging application scenarios.

[0039] In one embodiment, the portable charging pile 2 includes a communication unit 23; the communication unit 23 is connected to the wall mount 1 and the charging and discharging device 5, and is used to confirm the charging state or discharging state with the charging and discharging device 5 according to the charging and discharging instructions output by the wall mount 1, and to feedback the charging and discharging start signal to the wall mount 1.

[0040] As an example, the portable charging pile 2 includes a communication unit 23. The communication unit 23 is used to communicate with the charging and discharging device 5 through a charging gun or a connecting line, and obtain a charging and discharging start signal according to the charging and discharging response status of the charging and discharging device 5. The communication unit 23 is used to communicate with the wall mount 1 through a fixed male plug, communicate with the wall mount 1, obtain charging and discharging instructions, and feedback the charging and discharging start signal to the wall mount 1. Specifically, the communication module may include a charging and discharging identification and acquisition circuit to obtain charging and discharging instructions, and may also include a CP control guidance output circuit and a CP control guidance level acquisition circuit for confirming the charging and discharging response status with the charging and discharging device 5 (such as a new energy electric vehicle).

[0041] In one embodiment, the charging and discharging device further includes an anti-theft device 6 ; the anti-theft device 6 is connected to the wall mount 1 and the portable charging pile 2 .

[0042] As an example, the charging and discharging device also includes an anti-theft device 6. The anti-theft device 6 is connected to the wall mount 1 and the portable charging pile 2, and is used to lock the wall mount 1 and the portable charging pile 2 to prevent the portable charging pile 2 from being stolen. Furthermore, an electronic lock circuit connected to the MCU can also be provided in the control unit 15 of the wall mount 1, and the electronic lock circuit is connected to the anti-theft device 6, and is used to unlock or lock the anti-theft device 6 under the control of the MCU, so as to realize electronically controlled unlocking / locking.

[0043] The embodiment of the present invention further provides a control method for a charging and discharging device, which is applied to the charging and discharging device in any of the above embodiments, and is described by applying the control method to the control unit 15 of the wall mount 1, including: Figure 2 The following steps are shown: S201: Acquire charging and discharging signals; S202: If the charge-discharge signal is a charging signal, control the target power source to supply power to the portable charging pile or the charging-discharging device according to a preset charging strategy; S203: If the charge-discharge signal is a discharge signal, the portable charging pile or the charge-discharge device is controlled to supply power to the target power source according to a preset discharge strategy.

[0044] Among them, the charging and discharging signal is triggered by the user and is used to make the charging and discharging device charge and discharge, including a charging signal and a discharging signal. The wall mount 1 can control the target power supply to supply power to the portable charging pile 2 or the charging and discharging device 5 according to the charging signal, and the wall mount 1 can control the portable charging pile 2 or the charging and discharging device 5 to supply power to the target power supply according to the discharging signal.

[0045] As an example, in step S201, the control unit 15 obtains the charge and discharge signal triggered by the user. Specifically, a charge and discharge button connected to the control unit 15 can be provided on the wall mount 1. When the charge and discharge button is pressed, the control unit 15 can obtain the charge and discharge signal triggered by the user. Alternatively, a communication module connected to the control unit 15 for communicating with the smart terminal or the charging operation platform can be provided on the wall mount 1 to remotely obtain the charge and discharge signal sent by the smart terminal or the charging operation platform.

[0046] As an example, in step S202, the control unit 15 detects the charging and discharging signal. If the charging and discharging signal is a charging signal, the control unit 15 detects the connection status with the portable charging pile 2 according to the charging signal and a preset charging strategy, and notifies the portable charging pile 2 to prepare for charging. When it is finally confirmed that the charging operation can be performed, the target power supply is controlled to charge the portable charging pile 2, or to charge the charging and discharging device 5 connected to the portable charging pile 2.

[0047] As an example, in step S203, the control unit 15 detects the charge and discharge signal. If the charge and discharge signal is a discharge signal, the control unit 15 detects the connection status with the portable charging pile 2 according to the discharge signal and a preset discharge strategy, and notifies the portable charging pile 2 to prepare for discharge. When it is finally confirmed that the discharge operation can be performed, the portable charging pile 2 is controlled to charge the target power supply, or the charging and discharging device 5 connected to the portable charging pile 2 is controlled to charge the target power supply, so as to replenish the power grid.

[0048] In this example, the charging and discharging device can realize energy storage charging according to the charging and discharging signals and the preset charging strategy, and can also realize power replenishment to the power grid according to the preset discharge strategy. It can integrate photovoltaic charging, charging pile energy storage and reverse grid power replenishment functions, overcome the shortcomings of the existing charging piles with single functions, and can fully adapt to the application scenarios of light storage and charging.

[0049] In one embodiment, in step S202, according to a preset charging strategy, controlling the target power source to supply power to a portable charging pile or a charging and discharging device includes: S301: Outputting a charging instruction to a portable charging pile; S302: Obtain a charging start signal fed back by the portable charging pile, and control a target power source to supply power to the portable charging pile or the charging and discharging device based on the charging start signal.

[0050] As an example, in step S301, after detecting the charging signal, the control unit 15 can output a charging instruction to the portable charging pile 2 through the inter-board communication circuit to notify the portable charging pile 2 to prepare for charging. If the portable charging pile 2 is not connected to the charging and discharging device 5, the portable charging pile 2 needs to confirm the plug-in status between itself and the wall mount 1, and determine whether charging can be performed according to the current temperature. When confirming that the plug-in is completed and charging can be performed, the portable charging pile 2 feeds back a charging start signal to the wall mount 1; if the portable charging pile 2 is still connected to the charging and discharging device 5, the portable charging pile 2 also needs to communicate with the charging and discharging device 5 to obtain the charging response status of the charging and discharging device 5. When it is determined that the plug-in is completed, charging and discharging can be performed, and the charging and discharging device 5 is ready for charging, the charging start signal is fed back to the wall mount 1.

[0051] As an example, in step S302, after obtaining the charging start signal fed back by the charging pile, the control unit 15 selects any one of the photovoltaic power source 4 and the mains power source 3 as the target power source, controls the target power source to power the portable charging pile 2 or the charging and discharging device 5, and realizes energy storage and photovoltaic / mains charging functions.

[0052] In one embodiment, in step S202, according to a preset charging strategy, controlling the target power source to supply power to a portable charging pile or a charging and discharging device also includes: The current output power and the current output current are obtained. If the current output power is less than the preset output power and / or the current output current is less than the preset output current, the switching circuit 14 is controlled to connect the AC power supply 3 and the portable charging pile 2.

[0053] As an example, before the control unit 15 controls the target power supply to supply power to the portable charging pile 2 or the charging and discharging device 5, the photovoltaic power supply 4 can be used as the target power supply by default. During the charging process, the inverter load information of the photovoltaic power supply 4 can be obtained in real time through the load balancing control circuit, and the inverter load information includes the current output power and / or current output current of the inverter. When the current output power of the inverter is less than the preset output power, it indicates that the current load capacity of the photovoltaic power supply 4 inverter has reached the lower limit value, and the control unit 15 switches the mains power supply 3 to the target power supply, and controls the switching circuit 14 to switch and connect the mains power supply 3 and the portable charging pile 2, and / or, when the current output current of the inverter is less than the preset output current, it indicates that the current load capacity of the photovoltaic power supply 4 inverter has reached the lower limit value, and the control unit 15 switches the mains power supply 3 to the target power supply, and controls the switching circuit 14 to switch and connect the mains power supply 3 and the portable charging pile 2.

[0054] In one embodiment, in step S203, according to a preset discharge strategy, controlling the portable charging pile or the charging and discharging device to supply power to the power supply includes: S401: Outputting a discharge instruction to the portable charging pile; S402: Obtain a discharge start signal fed back by the portable charging pile, and control the portable charging pile or the charging and discharging device to supply power to the power supply based on the discharge start signal.

[0055] As an example, in step S401, after detecting the charging signal, the control unit 15 can output a discharge instruction to the portable charging pile 2 through the inter-board communication circuit to notify the portable charging pile 2 to prepare for discharge. If the portable charging pile 2 is not connected to the charging and discharging device 5, the portable charging pile 2 needs to confirm the plug-in status between itself and the wall mount 1, and determine whether discharge can be performed according to the current temperature. When confirming that the plug-in is completed and discharge can be performed, the portable charging pile 2 feeds back a discharge start signal to the wall mount 1; if the portable charging pile 2 is still connected to the charging and discharging device 5, the portable charging pile 2 also needs to communicate with the charging and discharging device 5 to obtain the discharge response status of the charging and discharging device 5. When it is determined that the plug-in is completed, charging and discharging can be performed, and the charging and discharging device 5 is ready for discharge, the discharge start signal is fed back to the wall mount 1.

[0056] As an example, in step S402, after obtaining the discharge start signal fed back by the charging pile, the control unit 15 controls the portable charging pile 2 or the charging and discharging device 5 to supply power to the target power source to supplement the power grid.

[0057] In one embodiment, in step S203, before controlling the portable charging pile or the charging and discharging device to supply power to the power supply, the control method of the charging and discharging system further includes: using the mains power supply 3 as the target power supply.

[0058] As an example, before controlling the portable charging pile 2 or the charging and discharging device 5 to supply power to the target power source, the control unit 15 first determines the AC power source 3 as the target power source, controls the switching circuit 14 to switch and connect the AC power source 3 and the portable charging pile 2, so as to enable the portable charging pile or the charging and discharging device 5 to supplement the AC power source 3 (such as a household power network) to recover electric energy and expand the application scenarios of the device.

[0059] An embodiment of the present invention also provides a charging and discharging system, comprising a mains power supply 3, a photovoltaic power supply 4 and a charging and discharging device in any of the above embodiments, wherein the charging and discharging device can execute a control method of the charging and discharging device in any of the above embodiments; a portable charging pile is used for detachable connection with the charging and discharging equipment.

[0060] As an example, the charging and discharging system includes a mains power supply 3, a photovoltaic power supply 4 and the charging and discharging device in the above example. The wall mount 1 in the charging and discharging device is connected to the mains power supply 3 and the photovoltaic power supply 4. The portable charging pile 2 in the charging and discharging device can be detachably connected to the wall mount 1. When used independently, it can realize an independent power supply function. When used together with the wall mount 1, it can be charged and discharged with the mains power supply 3 or the photovoltaic power supply 4 under the control of the wall mount 1. The connected charging and discharging equipment 5 can also be charged and discharged with the mains power supply 3 or the photovoltaic power supply 4 under the control of the wall mount 1, forming an integrated charging and discharging system of "light, storage and charging", which overcomes the shortcomings of the single function of existing charging piles and can fully adapt to light storage and charging application scenarios.

[0061] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A wall mount, characterized in that: Including mains interface, photovoltaic interface, charging pile interface, switching circuit and control unit; The mains interface is used to connect to a mains power supply, the photovoltaic interface is used to connect to a photovoltaic power supply, and the charging pile interface is used to be detachably connected to a portable charging pile; One end of the switching circuit is connected to the mains interface or the photovoltaic interface, and the other end of the switching circuit is connected to the charging pile interface; The control unit is connected to the switching circuit and is used to control the switching circuit to connect the target power supply and the portable charging pile and perform charging and discharging control; the target power supply is a mains power supply or a photovoltaic power supply.

2. The wall mount according to claim 1, characterized in that: The control unit is used to connect to the photovoltaic power source through the photovoltaic interface, obtain the current output power and current output current of the photovoltaic power source, and control the switching circuit to connect the AC power supply and the portable charging pile when the current output power is less than the preset output power and / or the current output current is less than the preset output current.

3. The wall mount according to claim 1, characterized in that: The control unit is used to connect to the portable charging pile through the charging pile interface, to output charging and discharging instructions to the portable charging pile through the charging pile interface, and to control the switching circuit to connect the target power supply and the portable charging pile according to the charging and discharging start signal transmitted back by the portable charging pile to realize charging and discharging control.

4. A charging and discharging device, characterized in that: It comprises a portable charging pile and a wall mount as claimed in any one of claims 1 to 3; The portable charging pile includes a wall mount interface and a device interface; The portable charging pile is detachably connected to the charging and discharging device via the device interface, and is used to output the stored electric energy to the charging and discharging device; The wall mount is detachably connected to the portable charging pile via the wall mount interface, and is used to connect the target power source to the portable charging pile, and control the target power source to charge and discharge with the portable charging pile or the charging and discharging device.

5. The charge and discharge device according to claim 4, characterized in that: The portable charging pile includes a communication unit; The communication unit is connected to the wall mount and the charging and discharging device, and is used to confirm the charging state or discharging state with the charging and discharging device according to the charging and discharging instructions output by the wall mount, and to feed back a charging and discharging start signal to the wall mount.

6. A control method for a charging and discharging device, characterized in that: The method is applied in the charging and discharging device as claimed in any one of claims 4 to 5, comprising the following steps performed by a control unit: Obtain charging and discharging signals; If the charging and discharging signal is a charging signal, the target power source is controlled to supply power to a portable charging pile or a charging and discharging device according to a preset charging strategy; If the charge-discharge signal is a discharge signal, the portable charging pile or the charge-discharge device is controlled to supply power to the target power source according to a preset discharge strategy.

7. The control method of the charge and discharge device according to claim 6, characterized in that: According to the preset charging strategy, controlling the target power supply to supply power to the portable charging pile or the charging and discharging equipment includes: Outputting a charging instruction to the portable charging pile; A charging start signal fed back by the portable charging pile is obtained, and based on the charging start signal, a target power source is controlled to supply power to the portable charging pile or the charging and discharging device.

8. The control method of the charge and discharge device according to claim 7, characterized in that: The method of controlling the target power source to supply power to the portable charging pile or the charging and discharging device according to the preset charging strategy also includes: Obtain the current output power and the current output current; if the current output power is less than the preset output power; and / or the current output current is less than the preset output current, control the switching circuit to connect the AC power supply and the portable charging pile.

9. The control method of the charge and discharge device according to claim 6, characterized in that: According to the preset discharge strategy, controlling the portable charging pile or the charging and discharging device to supply power to the power supply includes: Outputting a discharge instruction to the portable charging pile; A discharge start signal fed back by the portable charging pile is obtained, and based on the discharge start signal, the portable charging pile or the charging and discharging device is controlled to supply power to the power supply.

10. The control method of the charge and discharge device according to claim 6, characterized in that: Before controlling the portable charging pile or the charging and discharging device to supply power to the power supply, the control method of the charging and discharging system further includes: The switching circuit is controlled to connect the mains power supply and the portable charging pile.

11. A charging and discharging system, characterized in that: It comprises a mains power supply, a photovoltaic power supply and a charging and discharging device as claimed in any one of claims 4 to 5, wherein the charging and discharging device can execute the control method of the charging and discharging device as claimed in any one of claims 6 to 10; The portable charging pile is used for detachable connection with the charging and discharging equipment.

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