An energy router, control method and power system

Abstract

This invention discloses an energy router, a control method, and a power system. The energy router includes: a first terminal for connecting to the positive terminal of an energy storage battery; second, third, and fourth terminals for connecting to the three-phase input terminals of an AC power grid, or to the positive terminals of three photovoltaic power generation modules; a fifth terminal for connecting to one of the following: the negative terminal of the energy storage battery, the neutral wire of the AC power grid, or the negative terminal of a photovoltaic power generation module; and a switching module, whose first terminal is connected to a rectifier module, and whose second terminal is connected to the first, second, third, and fourth terminals respectively, for controlling whether the first, second, third, and fourth terminals are conductive according to control commands. This invention integrates photovoltaic DC / DC converter, energy storage DC / DC converter, and grid converter functions into a single hardware component, saving hardware costs.

Description

Technical Field

[0001] This invention relates to the field of electronic power technology, and more specifically, to an energy router, a control method, and a power system. Background Technology

[0002] Currently, in the new power system dominated by new energy sources, photovoltaic power generation, energy storage for backup power, and grid-coordinated power supply are very important components. Figure 1 Here is a structural diagram of an existing photovoltaic DC / DC converter. Figure 2 Here is a structural diagram of an existing energy storage DC / DC converter. Figure 3 The diagram shows the structure of existing converters. It can be seen that the three systems in the existing technology, namely photovoltaic DC / DC converters, energy storage DC / DC converters and grid converters, adopt different hardware structures. Once the hardware structure of each system is put into construction, its function is determined and cannot be flexibly switched to other functions.

[0003] In existing technologies, once the hardware structure of a converter in a power system is determined, its function is fixed and cannot be flexibly switched to other functions. Currently, no effective solution has been proposed. Summary of the Invention

[0004] This invention provides an energy router, a control method, and a power system to solve the problem in the prior art where the function of a converter in a power system is fixed once the hardware structure is determined, and it cannot be flexibly switched to other functions.

[0005] To address the aforementioned technical problems, the present invention provides an energy router, wherein the energy router comprises:

[0006] The first terminal is used to connect to the positive terminal of the energy storage battery;

[0007] The second, third, and fourth terminals are used to connect to the three-phase input terminals of the AC power grid, or to connect to the positive terminals of the three photovoltaic power generation modules, respectively.

[0008] The fifth terminal is used to connect to one of the following: the negative terminal of the energy storage battery, the neutral wire of the AC power grid, or the negative terminal of the photovoltaic power generation module.

[0009] The switching module has its first end connected to the rectifier module and its second end connected to the first terminal, the second terminal, the third terminal, and the fourth terminal, respectively, and is used to control whether the first terminal, the second terminal, the third terminal, and the fourth terminal are connected according to the control command.

[0010] Furthermore, the switching module includes:

[0011] The first switch has a first end connected between the upper and lower bridge arms of the first rectifier bridge of the rectifier module, a second end connected to the first terminal, and a third end connected to the second terminal.

[0012] The second switch has its first end connected between the upper and lower bridge arms of the second rectifier bridge of the rectifier module, its second end connected to the first terminal, and its third end connected to the third terminal.

[0013] The third switch has its first end connected between the upper and lower bridge arms of the third rectifier bridge of the rectifier module, its second end connected to the first terminal, and its third end connected to the fourth terminal.

[0014] Furthermore, the first switch, the second switch, and the third switch are single-pole double-throw switches.

[0015] Furthermore, the energy router also includes:

[0016] The fourth switch is located between the negative terminal of the rectifier module and the fifth terminal.

[0017] The present invention also provides a power system including the above-mentioned energy router.

[0018] The present invention also provides a switching control method applied to the above-mentioned energy router, the method comprising:

[0019] Detect the voltage signals input at the first, second, third, and fourth terminals;

[0020] The function of the energy router is determined based on the voltage signals input from the first terminal, the second terminal, the third terminal, and the fourth terminal; wherein the function includes: grid converter, photovoltaic DC / DC converter, and energy storage DC / DC converter;

[0021] Based on the conduction status of the function control switching module of the energy router, the first terminal, the second terminal, the third terminal, the fourth terminal, and the fifth terminal are controlled to be on or off.

[0022] Further, the function of the energy router is determined based on the voltage signals input from the first terminal, the second terminal, the third terminal, and the fourth terminal, including:

[0023] Determine whether there is a voltage signal input to the second terminal, the third terminal, and the fourth terminal;

[0024] If the determination result is yes, then determine whether the voltage signal input to the second terminal, the third terminal, and the fourth terminal is an AC signal or a DC signal; if it is a DC signal, then determine that the function of the energy router is photovoltaic DC / DC converter; if it is an AC signal, then determine that the function of the energy router is grid converter.

[0025] If the result is negative, then determine whether there is a voltage signal input at the first terminal; if yes, then determine that the function of the energy router is energy storage DC / DC converter.

[0026] Furthermore, based on the conduction status of the function control switching module of the energy router, the system controls whether the first terminal, the second terminal, the third terminal, the fourth terminal, and the fifth terminal are connected, including:

[0027] If the function of the energy router is energy storage DC / DC converter, then control the switching module to switch to the first conduction state, thereby controlling the first terminal to conduct, and controlling the fourth switch to conduct, thereby controlling the fifth terminal to conduct;

[0028] If the function of the energy router is photovoltaic DC / DC converter, then the switching module is controlled to switch to the second conduction state, thereby controlling the second terminal, the third terminal, and the fourth terminal to conduct, and the fourth switch is controlled to conduct, thereby controlling the fifth terminal to conduct;

[0029] If the function of the energy router is grid converter, the switching module is controlled to switch to the second conduction state, thereby controlling the second terminal, the third terminal, and the fourth terminal to conduct;

[0030] The fourth switch is located between the negative terminal of the rectifier module and the fifth terminal.

[0031] Furthermore, after controlling whether the first terminal, the second terminal, the third terminal, the fourth terminal, and the fifth terminal are connected based on the conduction status of the function control switching module of the energy router, the method further includes:

[0032] The corresponding control strategy is switched according to the function of the energy router.

[0033] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the above-described switching control method.

[0034] By applying the technical solution of this invention, the switching module switches the conductive terminals in the energy router, thereby controlling the energy router to flexibly switch between three functions: photovoltaic DC / DC converter, energy storage DC / DC converter, and grid converter. This enables the integration of these three functions into a single hardware component, saving hardware costs. Attached Figure Description

[0035] Figure 1Here is a structural diagram of an existing photovoltaic DC / DC converter;

[0036] Figure 2 Here is a structural diagram of an existing energy storage DC / DC converter;

[0037] Figure 3 Here is a structural diagram of an existing converter;

[0038] Figure 4 This is a structural diagram of an energy router according to an embodiment of the present invention;

[0039] Figure 5 This is a flowchart of a switching control method according to an embodiment of the present invention;

[0040] Figure 6 This is a flowchart of a switching control method according to another embodiment of the present invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0042] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0043] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0044] It should be understood that although the terms first, second, third, etc., may be used to describe switches in the embodiments of the present invention, these switches should not be limited to these terms. These terms are only used to distinguish switches in different locations. For example, without departing from the scope of the embodiments of the present invention, a first switch may also be referred to as a second switch, and similarly, a second switch may also be referred to as a first switch.

[0045] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0046] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0047] The optional embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0048] Example 1

[0049] As mentioned above Figure 1 As shown, the energy storage DC / DC converter includes a high-voltage side DC input terminal VH+, an output terminal VH-, a high-voltage side main circuit contactor K3, a high-voltage side charging circuit contactor K1, a high-voltage side charging resistor R1, a high-voltage side bus capacitor C1, switching transistors S1 to S6 and their reverse-parallel diodes D1 to D6, an inductor L1 connected between the emitter of switching transistor S1 and the collector of switching transistor S2; an inductor L2 connected between the emitter of switching transistor S3 and the collector of switching transistor S4; an inductor L3 connected between the emitter of switching transistor S5 and the collector of switching transistor S6; a low-voltage side bus capacitor C2, a low-voltage side main circuit contactor K4, a low-voltage side charging circuit contactor K2, a low-voltage side charging resistor R2; and a low-voltage side DC input terminal VL+ and an output terminal VL-.

[0050] As mentioned above Figure 2 As shown, the photovoltaic DC / DC converter includes a high-voltage side DC input terminal VH+, an output terminal VH-, a high-voltage side main circuit contactor K3; a high-voltage side charging circuit contactor K1, a high-voltage side charging resistor R1, a high-voltage side bus capacitor C1, diodes D1, D3, D5, switching transistors S2, S4, S6, and diodes D2, D4, D6 connected in reverse parallel with them; an inductor L1 is connected between the anode of diode D1 and the collector of switching transistor S2; an inductor L2 is connected between the anode of diode D3 and the collector of switching transistor S4; an inductor L3 is connected between the anode of diode D5 and the collector of switching transistor S6, and also includes three photovoltaic input interfaces PV1+, PV2+, PV3+ and an output terminal PV-.

[0051] As mentioned above Figure 3 As shown, the grid converter includes a high-voltage side DC input terminal VH+, an output terminal VH-, a high-voltage side main circuit contactor K3, a high-voltage side charging circuit contactor K1, a high-voltage side charging resistor R1; a high-voltage side bus capacitor C1; switching transistors S1 to S6 and diodes D1 to D6 connected in reverse parallel with them; an inductor L1 connected between the emitter of switching transistor S1 and the collector of switching transistor S2; an inductor L2 connected between the emitter of switching transistor S3 and the collector of switching transistor S4; an inductor L3 connected between the emitter of switching transistor S5 and the collector of switching transistor S6; and three-phase AC input terminals R, S, and T.

[0052] Depend on Figures 1-3 It is evident that photovoltaic DC / DC converters, energy storage DC / DC converters, and grid converters achieve different functions through different structures. Once the hardware structure of a converter in a power system is determined, its function is fixed, and the inability to flexibly switch to other functions leads to a waste of hardware costs.

[0053] To address the aforementioned problems, this embodiment provides an energy router. Figure 4 A structural diagram of an energy router according to an embodiment of the present invention is shown below. Figure 4 As shown, the energy router includes: a first terminal VL+ for connecting to the positive terminal of the energy storage battery; a second terminal PV1+ / R, a third terminal PV2+ / S, and a fourth terminal PV3+ / T for connecting to the three-phase input terminals of the AC power grid, or to the positive terminals of three photovoltaic power generation modules, respectively; a fifth terminal VL- / PV- for connecting to one of the following: the negative terminal of the energy storage battery, the neutral wire of the AC power grid, or the negative terminal of the photovoltaic power generation module; and a switching module 10, whose first terminal is connected to the rectifier module 20, and whose second terminal is connected to the first terminal VL+, the second terminal PV1+ / R, the third terminal PV2+ / S, and the fourth terminal PV3+ / T, respectively, for receiving control commands from the control chip and controlling whether the first terminal VL+, the second terminal PV1+ / R, the third terminal PV2+ / S, and the fourth terminal PV3+ / T are on or off according to the control commands.

[0054] The energy router in this embodiment switches the active terminals in the energy router through a switching module, thereby controlling the energy router to flexibly switch between three functions: photovoltaic DC / DC converter, energy storage DC / DC converter, and grid converter. It can realize the integration of photovoltaic DC / DC converter, energy storage DC / DC converter, and grid converter functions through the same hardware, saving hardware costs.

[0055] like Figure 4As shown, the switching module 10 includes: a first switch K5, whose first end is connected between the upper and lower bridge arms of the first rectifier bridge of the rectifier module 20, its second end is connected to the first terminal VL+, and its third end is connected to the second terminal PV1+ / R; a second switch K6, whose first end is connected between the upper and lower bridge arms of the second rectifier bridge of the rectifier module 20, its second end is connected to the first terminal VL+, and its third end is connected to the third terminal PV2+ / S; and a third switch K7, whose first end is connected between the upper and lower bridge arms of the third rectifier bridge of the rectifier module 20, its second end is connected to the first terminal VL+, and its third end is connected to the fourth terminal PV3+ / T.

[0056] To achieve the switching function, the first switch K5, the second switch K6, and the third switch are single-pole double-throw switches, specifically single-pole double-throw relays. The stationary contact of the first relay is connected to the upper and lower arms of the first rectifier bridge of the rectifier module 20 through inductor L1, and the first moving contact 1 is connected to the first terminal VL+, and the second moving contact 2 is connected to the second terminal PV1+ / R. The stationary contact of the second relay is connected to the upper and lower arms of the second rectifier bridge of the rectifier module 20 through inductor L2, and the first moving contact 1 is connected to the first terminal VL+, and the second moving contact 2 is connected to the third terminal PV2+ / S. The stationary contact of the third relay is connected to the upper and lower arms of the third rectifier bridge of the rectifier module 20 through inductor L3, and the first moving contact 1 is connected to the first terminal VL+, and the second moving contact 2 is connected to the fourth terminal PV3+ / T.

[0057] In order to control whether the fifth terminal is conducting, the energy router also includes a fourth switch K8, which is disposed between the negative terminal of the rectifier module 20 and the fifth terminal VL- / PV-.

[0058] In summary, the energy router of this embodiment includes: a high-voltage side DC input terminal VH+, an output terminal VH-, switching transistors S1 to S6 and their reverse-parallel diodes D1 to D6, an inductor L1 connected between the emitter of switching transistor S1 and the collector of switching transistor S2; an inductor L2 connected between the emitter of switching transistor S3 and the collector of switching transistor S4; an inductor L3 connected between the emitter of switching transistor S5 and the collector of switching transistor S6; the stationary contacts of the first switch K5, the second switch K6, and the second switch K7 are respectively connected to the right side of inductors L1 to L3; and a fourth switch K8 is connected to the switching transistor S1 to S6. 2. S4 and S6 are connected with common emitters; the low-voltage side DC terminals include: the first terminal VL+, used to connect to the positive terminal of the energy storage battery; the second terminal PV1+ / R, the third terminal PV2+ / S and the fourth terminal PV3+ / T, used to connect to the three-phase input terminals of the AC power grid, or to connect to the positive terminals of the three photovoltaic power generation modules respectively; the fifth terminal VL- / PV-, used to connect to one of the following: the negative terminal of the energy storage battery, the neutral line of the AC power grid, or the negative terminal of the photovoltaic power generation module. Among them, the first switch K5, the second switch K6 and the third switch K7 are single-pole double-throw relays.

[0059] Example 2

[0060] This embodiment provides a power system including the energy router described in the above embodiment, which integrates three functions—photovoltaic DC / DC converter, energy storage DC / DC converter, and grid converter—through the same hardware, thereby saving hardware costs.

[0061] Example 3

[0062] This embodiment provides a switching control method applied to the energy router in the above embodiment. Figure 5 A flowchart of a switching control method according to an embodiment of the present invention is shown below. Figure 5 As shown, the method includes:

[0063] S101 detects the voltage signals input from the first terminal, the second terminal, the third terminal, and the fourth terminal.

[0064] S102, determine the function of the energy router based on the voltage signals input from the first terminal, the second terminal, the third terminal and the fourth terminal; wherein, the above functions include: grid converter, photovoltaic DC / DC converter and energy storage DC / DC converter.

[0065] S103, based on the conduction status of the function control switching module of the energy router, thereby controlling whether the first terminal, second terminal, third terminal, fourth terminal and fifth terminal are connected.

[0066] The switching control method of this embodiment determines the function of the energy router based on the voltage signals input from the first terminal, the second terminal, the third terminal, and the fourth terminal; controls the conduction state of the switching module according to the function of the energy router, thereby controlling whether the first terminal, the second terminal, the third terminal, the fourth terminal, and the fifth terminal are conducting, and can realize flexible switching of the energy router between three functions: photovoltaic DC / DC converter, energy storage DC / DC converter, and grid converter.

[0067] Since the voltage signal output by the energy storage battery has only one phase, while the voltage signals output by the photovoltaic module and the grid voltage signals have three phases, and the voltage signal input by the photovoltaic module is a DC signal while the three-phase voltage signals input by the grid are AC signals, in order to accurately distinguish the voltage signals output by the energy storage battery, the grid, and the photovoltaic module, and thus accurately determine the function that the energy converter will enter, the function of the energy router is determined based on the voltage signals input to the first, second, third, and fourth terminals. This includes: determining whether there is a voltage signal input to the second, third, and fourth terminals; if the determination result is yes, then determining whether the voltage signal input to the second, third, and fourth terminals is a DC signal or an AC signal; if it is a DC signal, then the function of the energy router is determined to be a photovoltaic DC / DC converter; if it is an AC signal, then the function of the energy router is determined to be a grid converter; if the determination result is no, then determining whether there is a voltage signal input to the first terminal; if yes, then the function of the energy router is determined to be an energy storage DC / DC converter; if no, then it is assumed that there is no power supply, and the energy router is simply powered off.

[0068] The switching module is controlled to operate according to the function of the energy router, thereby controlling whether the first terminal, the second terminal, the third terminal, the fourth terminal, and the fifth terminal are connected. This includes: if the energy router functions as an energy storage DC / DC converter, the switching module is switched to a first connected state, i.e., the first moving contact of the first switch, the second switch, and the second switch are connected, thereby controlling the first terminal to be connected, and the fourth switch to be connected, thereby controlling the fifth terminal to be connected; if the energy router functions as a photovoltaic DC / DC converter, the switching module is switched to a second connected state, i.e., the second moving contact of the first switch, the second switch, and the second switch are connected, thereby controlling the second terminal, the third terminal, and the fourth terminal to be connected, and the fourth switch to be connected, thereby controlling the fifth terminal to be connected.

[0069] If the function of the energy router is grid conversion, then the switching module is controlled to switch to the second conduction state, that is, the first switch, the second switch, and the second moving contact of the second switch are controlled to conduct, thereby controlling the second terminal, the third terminal, and the fourth terminal to conduct.

[0070] Since the control strategies differ under different functions, after controlling the conduction status of the switching module according to the function of the energy router, and then controlling whether the first terminal, the second terminal, the third terminal, the fourth terminal and the fifth terminal are connected, the above method further includes: switching the corresponding control strategy according to the function of the energy router.

[0071] Figure 6 A flowchart of a switching control method according to another embodiment of the present invention is shown below. Figure 5 As shown, the method includes the following preferred steps:

[0072] S1, System initialization.

[0073] S2 detects the voltage signals input to each terminal.

[0074] S3. Determine whether there is a voltage signal input to the second terminal, the third terminal, and the fourth terminal. If yes, proceed to step S5; otherwise, proceed to step S4.

[0075] S4. Determine if there is a voltage signal input at the first terminal. If yes, proceed to step S12; otherwise, proceed to step S11.

[0076] S5. Determine whether the voltage signal input to the second, third, and fourth terminals is a DC signal or an AC signal. If it is an AC signal, proceed to step S6; if it is a DC signal, proceed to step S9.

[0077] S6 controls the first switch, the second switch, and the second moving contact of the second switch to be turned on, thereby controlling the second terminal, the third terminal, and the fourth terminal to be turned on.

[0078] The voltage signal input to the photovoltaic module is a DC signal, while the three-phase voltage signal input to the power grid is an AC signal. If the voltage signals input to the second, third, and fourth terminals are DC signals, it indicates that a photovoltaic module has been connected. Therefore, the function of the energy router should be switched to photovoltaic DC / DC converter.

[0079] S7 controls the fourth switch to turn on, which in turn controls the fifth terminal to turn on.

[0080] S8 uses a photovoltaic DC / DC converter control strategy.

[0081] S9 controls the first switch, the second switch, and the second moving contact of the second switch to be turned on, thereby controlling the second terminal, the third terminal, and the fourth terminal to be turned on.

[0082] S10, the control strategy is the grid converter control strategy.

[0083] S11 controls the power router to shut down.

[0084] If there is no voltage signal input at the first, second, third, and fourth terminals, it means there is no power supply. Simply turn off the power to the power router.

[0085] S12 controls the first switch, the second switch, and the first moving contact of the second switch to be turned on, thereby controlling the first terminal to be turned on.

[0086] S13 controls the fourth switch to turn on, which in turn controls the fifth terminal to turn on.

[0087] S14, the control strategy is switched to the energy storage DC / DC converter control strategy.

[0088] S15 controls the normal operation of the energy router.

[0089] Example 4

[0090] This embodiment provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the switching control method of the above embodiment.

[0091] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An energy router, characterized in that, The energy router includes: The first terminal is used to connect to the positive terminal of the energy storage battery; The second, third, and fourth terminals are used to connect to the three-phase input terminals of the AC power grid, or to connect to the positive terminals of the three photovoltaic power generation modules, respectively. The fifth terminal is used to connect to the negative terminal of the energy storage battery, the neutral wire of the AC power grid, or the negative terminal of the photovoltaic power generation module; The switching module has its first end connected to the rectifier module and its second end connected to the first terminal, the second terminal, the third terminal, and the fourth terminal respectively, and is used to control whether the first terminal, the second terminal, the third terminal, and the fourth terminal are connected according to the control command. The switching module includes: a first switch, the first end of which is connected between the upper and lower bridge arms of the first rectifier bridge of the rectifier module, the second end of which is connected to the first terminal, and the third end of which is connected to the second terminal; a second switch, the first end of which is connected between the upper and lower bridge arms of the second rectifier bridge of the rectifier module, the second end of which is connected to the first terminal, and the third end of which is connected to the third terminal; and a third switch, the first end of which is connected between the upper and lower bridge arms of the third rectifier bridge of the rectifier module, the second end of which is connected to the first terminal, and the third end of which is connected to the fourth terminal.

2. The energy router according to claim 1, characterized in that, The first switch, the second switch, and the third switch are single-pole double-throw switches.

3. The energy router according to claim 1, characterized in that, The energy router also includes: The fourth switch is located between the negative terminal of the rectifier module and the fifth terminal.

4. A power system, characterized in that, The energy router includes any one of claims 1 to 3.

5. A switching control method, applied to the energy router according to any one of claims 1 to 3, characterized in that, The method includes: Detect the voltage signals input at the first, second, third, and fourth terminals; The function of the energy router is determined based on the voltage signals input from the first terminal, the second terminal, the third terminal, and the fourth terminal; wherein the function includes: grid converter, photovoltaic DC / DC converter, and energy storage DC / DC converter; Based on the conduction status of the function control switching module of the energy router, the first terminal, the second terminal, the third terminal, the fourth terminal, and the fifth terminal are controlled to be on or off.

6. The method according to claim 5, characterized in that, The function of the energy router is determined based on the voltage signals input from the first, second, third, and fourth terminals, including: Determine whether there is a voltage signal input to the second terminal, the third terminal, and the fourth terminal; If the determination result is yes, then determine whether the voltage signal input to the second terminal, the third terminal, and the fourth terminal is an AC signal or a DC signal; if it is a DC signal, then determine that the function of the energy router is photovoltaic DC / DC converter; if it is an AC signal, then determine that the function of the energy router is grid converter. If the result is negative, then determine whether there is a voltage signal input at the first terminal; if yes, then determine that the function of the energy router is energy storage DC / DC converter.

7. The method according to claim 5, characterized in that, Based on the conduction status of the function control switching module of the energy router, the system controls whether the first terminal, the second terminal, the third terminal, the fourth terminal, and the fifth terminal are connected, including: If the function of the energy router is energy storage DC / DC converter, then control the switching module to switch to the first conduction state, thereby controlling the first terminal to conduct, and controlling the fourth switch to conduct, thereby controlling the fifth terminal to conduct; If the function of the energy router is photovoltaic DC / DC converter, then the switching module is controlled to switch to the second conduction state, thereby controlling the second terminal, the third terminal, and the fourth terminal to conduct, and the fourth switch is controlled to conduct, thereby controlling the fifth terminal to conduct; If the function of the energy router is grid converter, the switching module is controlled to switch to the second conduction state, thereby controlling the second terminal, the third terminal, and the fourth terminal to conduct; The fourth switch is located between the negative terminal of the rectifier module and the fifth terminal.

8. The method according to claim 5, characterized in that, Based on the conduction status of the function control switching module of the energy router, and subsequently controlling whether the first terminal, the second terminal, the third terminal, the fourth terminal, and the fifth terminal are connected, the method further includes: The corresponding control strategy is switched according to the function of the energy router.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 5 to 8.

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