Adapter and energy storage system

Abstract

The application discloses an adapter and an energy storage system. The adapter comprises a body, a connection port, a first connection unit and a second connection unit. The connection port is arranged on the body and comprises a first port, a second port and a third port. The first port is configured to be connected with a diesel generating module, the second port is configured to be connected with a power distribution module, and the third port is configured to be connected with an energy storage converter. The first connection unit is connected between the first port and the second port and is configured to transmit AC power at the first port to the second port. The second connection unit is connected between the first connection unit and the third port and is configured to convert the AC power at the first port into DC power and transmit the DC power to the third port. In the application, the energy storage converter does not need to track the frequency of the diesel generating module in real time, thereby reducing the interference caused by the frequency or voltage fluctuation of the diesel generating module and improving the stability of the energy storage system.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and more specifically, to an adapter and an energy storage system. Background Technology

[0002] Energy storage systems, such as photovoltaic (PV) energy storage systems, are systems capable of storing electrical energy and releasing it when needed. In related technologies, energy storage systems may include an energy storage converter and a power distribution module. The energy storage converter is electrically connected to the PV modules to convert the direct current (DC) output from the PV modules into alternating current (AC). The power distribution module is electrically connected to the energy storage converter and is used at least for power distribution control. Typically, when an energy storage system is connected to a diesel engine, the AC output of the diesel engine and the AC output of the energy storage converter are connected in parallel, and power distribution control is achieved through the power distribution module. However, due to the inherent frequency or voltage fluctuations and instability of the diesel engine, the energy storage converter is difficult to adapt to parallel operation with the diesel engine, affecting the operational stability of the energy storage system. Utility Model Content

[0003] This application provides an adapter and an energy storage system to at least solve the technical problem that the energy storage converter is difficult to adapt to the parallel operation of diesel engines, which affects the operational stability of the energy storage system.

[0004] The first aspect of this application provides an adapter for an energy storage system, the energy storage system including a diesel generator module, a power distribution module, and an energy storage converter. The adapter includes a body, a connection port, a first connection unit, and a second connection unit. The connection port is located on the body and includes a first port, a second port, and a third port. The first port is configured to connect to the diesel generator module, the second port is configured to connect to the power distribution module, and the third port is configured to connect to the energy storage converter. The first connection unit is connected between the first port and the second port and is configured to transmit alternating current (AC) from the first port to the second port. The second connection unit is connected between the first connection unit and the third port and is configured to convert the AC power from the first port to direct current (DC) and transmit the DC power to the third port.

[0005] In some embodiments, the first port includes four first interfaces, and the second port includes four second interfaces, with the four first interfaces and four second interfaces corresponding to each other; the first connection unit includes a first phase line, a second phase line, a first connector, and a second connector, the first phase line, the second phase line, the first connector, and the second connector being respectively connected between a pair of first interfaces and second interfaces, the first phase line and the second phase line being configured to transmit AC power from the first port to the second port, the first connector being configured to form a current return path, and the second connector being configured to be grounded.

[0006] In some embodiments, the first connection unit further includes two first circuit breakers, which are respectively disposed on the first phase line and the second phase line, and the first circuit breakers are in a normally closed state.

[0007] In some embodiments, the first connector is a parallel line and the second connector is a parallel line.

[0008] In some embodiments, the voltage difference between the first phase line and the second phase line is 240V, the voltage difference between the first phase line and the first connector is 120V, and the voltage difference between the second phase line and the first connector is 120V.

[0009] In some embodiments, the third port includes a first DC negative interface, a first DC positive interface, a second DC negative interface, and a second DC positive interface; the second connection unit includes a first connection line, a second connection line, a third connection line, and a fourth connection line. The first connection line connects to the first phase line of the first connection unit and the first DC negative interface, and a first diode is provided on the first connection line, with the anode of the first diode connected to the first DC negative interface. The second connection line connects to the cathode of the first diode and the first DC positive interface. The third connection line connects to the second phase line of the first connection unit and the second DC negative interface, and a second diode is provided on the third connection line, with the anode of the second diode connected to the second DC negative interface. The fourth connection line connects to the cathode of the second diode and the second DC positive interface; wherein the second connection line is configured to form a current loop together with the third connection line, and the fourth connection line is configured to form a current loop together with the first connection line.

[0010] In some embodiments, the second connection unit further includes a fifth connection line, the opposite ends of which are respectively connected to the positive terminals of the first diode and the second diode, and the fifth connection line is configured to make the first diode and the second diode have the same potential.

[0011] In some embodiments, the second connection unit further includes two second circuit breakers, which are respectively disposed on the first connection line and the third connection line, and the second circuit breakers are in a normally closed state.

[0012] The energy storage system provided in the second aspect of the embodiments of this application includes a diesel generator module, a power distribution module, an energy storage converter, and an adapter as described in any of the above embodiments, wherein the diesel generator module, the power distribution module, and the energy storage converter are all connected to the adapter.

[0013] In some embodiments, the power distribution module includes a relay configured to switch on and off to control power transmission between the diesel generator module and the power distribution module, or to control power transmission between the diesel generator module and the energy storage converter.

[0014] In the adapter and energy storage system of this application, a first port can be connected to a diesel generator module, a third port can be connected to an energy storage converter, and a second connection unit is connected between the first connection unit and the third port. The second connection unit can convert the AC power at the first port to DC power and transmit the DC power to the third port. Thus, compared with the parallel connection of the AC output terminal of the generator and the AC output terminal of the energy storage converter in related technologies, the adapter in this application can transmit DC power to the energy storage converter through the third port. DC power has no frequency problem, so the energy storage converter does not need to track the fluctuations of the diesel generator module in real time. For example, the energy storage converter does not need to track the frequency fluctuations of the diesel generator module in real time, avoiding the frequent triggering of out-of-step protection or power oscillation of the energy storage converter due to real-time tracking of the fluctuations of the diesel generator module. This reduces the interference caused by the unstable frequency or voltage fluctuations of the diesel generator module and improves the stability and reliability of the energy storage system.

[0015] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0017] Figure 1This is a schematic diagram of the energy storage system according to certain embodiments of this application;

[0018] Figure 2 This is a schematic diagram of the adapter structure according to some embodiments of this application;

[0019] Figure 3 This is a schematic diagram of the connection structure of the adapter according to some embodiments of this application.

[0020] Explanation of key component symbols:

[0021] 1000 energy storage system;

[0022] 100 adapters; 200 diesel generator modules; 300 power distribution modules; 400 energy storage converters; 500 photovoltaic modules;

[0023] 10 body;

[0024] 30 Connection port, 31 First port, 311 First interface, 33 Second port, 331 Second interface, 35 Third port, 351 First DC negative interface, 353 First DC positive interface, 355 Second DC negative interface, 357 Second DC positive interface;

[0025] 50 First connecting unit, 51 First phase line, 52 Second phase line, 53 First connector, 54 Second connector, 55 First circuit breaker;

[0026] 70 Second connecting unit, 71 First connecting line, 72 Second connecting line, 73 Third connecting line, 74 Fourth connecting line, 75 First diode, 76 Second diode, 77 Fifth connecting line, 78 Second circuit breaker. Detailed Implementation

[0027] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting the embodiments of this application.

[0028] In the description of this application, it should be understood that the terms "thickness," "upper," "top," "bottom," "inner," "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly. In one example, they can be a fixed connection, a detachable connection, or an integral connection; they can be a mechanical connection, an electrical connection, or a connection that allows communication between them; they can be a direct connection or an indirect connection through an intermediate medium; they can be the internal connection of two elements or the interaction between two elements.

[0030] Energy storage systems, such as photovoltaic (PV) energy storage systems, are systems capable of storing electrical energy and releasing it when needed. In related technologies, energy storage systems may include an energy storage converter and a power distribution module. The energy storage converter is electrically connected to the PV modules to convert the direct current (DC) output from the PV modules into alternating current (AC). The power distribution module is electrically connected to the energy storage converter and is used at least to implement power distribution control. Typically, when an energy storage system is connected to a diesel engine, the AC output of the diesel engine and the AC output of the energy storage converter are connected in parallel, and power distribution control is achieved through the power distribution module. However, due to the inherent frequency or voltage fluctuations and instability of the diesel engine, the energy storage converter is difficult to adapt to parallel operation with the diesel engine, affecting the normal operation of the energy storage system. To solve the above problem, please refer to [link to relevant documentation]. Figure 1 This application provides an adapter 100 and an energy storage system 1000.

[0031] Please see Figure 1 and Figure 2 The energy storage system 1000 of this application includes a diesel generator module 200, a power distribution module 300, an energy storage converter 400 and an adapter 100, and the diesel generator module 200, the power distribution module 300 and the energy storage converter 400 are all connected to the adapter 100.

[0032] Specifically, in the above embodiments, the diesel generator module 200 may include a diesel engine. The diesel generator module 200 is a device that generates mechanical energy by burning diesel fuel and can convert the mechanical energy into electrical energy. The electrical energy output by the diesel generator module 200 can be alternating current (AC).

[0033] The power distribution module 300 is a device for at least realizing power distribution, protection, and monitoring. The power distribution module 300 can distribute electrical energy from different power sources (such as diesel engines, photovoltaics, energy storage, etc.) to the mains power grid and / or power-consuming modules. For example, when both the power distribution module 300 and the diesel generator module 200 are electrically connected to the adapter 100, the electrical energy from the diesel generator module 200 can be transmitted to the power distribution module 300 through the adapter 100. Thus, the power distribution module 300 can transmit the electrical energy from the diesel generator module 200 to the mains power grid and / or power-consuming modules.

[0034] The Power Conversion System (PCS) 400 is a device capable of at least current conversion. It can convert direct current (DC) into constant-frequency, constant-voltage or frequency- and voltage-regulated alternating current (AC) (e.g., 220V, 50Hz sine wave, adaptable to specific needs). For example, when receiving DC power, the PCS can convert it into AC power of a preset voltage and frequency according to actual requirements for subsequent use. Furthermore, the PCS can also transmit the AC power to the mains power grid and / or power-consuming modules.

[0035] In some embodiments of this application, when both the energy storage converter 400 and the diesel generator module 200 are electrically connected to the adapter 100, the adapter 100 can convert the electrical energy output by the diesel generator module 200 into direct current (DC) and transmit the DC to the energy storage converter 400. When the energy storage converter 400 receives the DC, it can convert the DC into alternating current (AC) with a preset voltage and frequency according to actual needs for subsequent use.

[0036] In some embodiments, the power distribution module 300 is provided with a relay, which is configured to be able to switch on and off to control the power transmission between the diesel generator module 200 and the power distribution module 300, or to control the power transmission between the diesel generator module 200 and the energy storage converter 400.

[0037] Specifically, in the above embodiments, the relay is an electrically controlled switch that controls the on / off state of a high-current circuit (main circuit) through a small current signal (control circuit), thereby achieving circuit isolation, protection, automatic switching, or logic control. Specifically, when the relay is on, power can be transferred between the diesel generator module 200 and the power distribution module 300, but not between the diesel generator module 200 and the energy storage converter 400; when the relay is off, power can be transferred between the diesel generator module 200 and the energy storage converter 400, but not between the diesel generator module 200 and the power distribution module 300.

[0038] In some embodiments, the energy storage system 1000 may further include a photovoltaic module 500, which is electrically connected to the energy storage converter 400. The photovoltaic module 500 is a structure capable of converting solar energy into electrical energy. The photovoltaic module 500 may include multiple solar cells electrically connected to each other. The solar cells are used to convert solar energy into electrical energy. The solar cells can be different types of solar energy conversion devices such as perovskite cells, monocrystalline silicon, polycrystalline silicon, or thin-film solar cells. The arrangement of the photovoltaic module 500 and the diesel generator module 200 enables the energy storage system 1000 to form a hybrid energy storage system, thereby achieving a more efficient and stable energy supply. For example, when the photovoltaic module 500's power generation is insufficient, the diesel generator module 200 can start to ensure uninterrupted power supply; when the photovoltaic module 500's power generation is sufficient, the diesel generator module 200 can shut down to save fuel costs and reduce carbon emissions.

[0039] Since the energy storage system 1000 in this embodiment includes an adapter 100, it is understood that the energy storage system 1000 includes at least the same beneficial effects as the adapter 100. Therefore, for the beneficial effects of the energy storage system 1000, please refer to the beneficial effects of the adapter 100 described below.

[0040] Please see Figure 1 and Figure 2The adapter 100 of this application includes a body 10, a connection port 30, a first connection unit 50, and a second connection unit 70. The connection port 30 is located on the body 10 and includes a first port 31, a second port 33, and a third port 35. The first port 31 is configured to connect to a diesel generator module 200, the second port 33 is configured to connect to a power distribution module 300, and the third port 35 is configured to connect to an energy storage converter 400. The first connection unit 50 is connected between the first port 31 and the second port 33 and is configured to transmit AC power from the first port 31 to the second port 33. The second connection unit 70 is connected between the first connection unit 50 and the third port 35 and is configured to convert the AC power from the first port 31 to DC power and transmit the DC power to the third port 35.

[0041] Specifically, in the above embodiments, the body 10 is the structure in the adapter 100 used to house and protect components such as the connection port 30, the first connection unit 50, and the second connection unit 70. The body 10 can be made of metallic and / or non-metallic materials. Metallic materials include, but are not limited to, aluminum, iron, steel, or aluminum alloys, while non-metallic materials include, but are not limited to, plastics. In some embodiments, the body 10 can be made of both metallic and non-metallic materials, thereby increasing the structural strength of the body 10, enhancing its ability to resist external environmental factors (such as wind, rain, and snow), ensuring the stability and reliability of the adapter 100's operation, and extending the service life of the adapter 100. In other embodiments, the body 10 can be made of non-metallic materials, which makes the body 10 lighter, thus facilitating the portability of the adapter 100.

[0042] Connection port 30 is a structure in adapter 100 used for physical connection. Connection port 30 is a node for adapter 100 to interact with external devices (such as diesel generator module 200, power distribution module 300, and energy storage converter 400). Connection port 30 is used to realize at least one of the functions of signal transmission, power transmission, or data exchange. First port 31 is a port in adapter 100 that can be connected to diesel generator module 200. First port 31 may include at least a power transmission port, so that electrical energy from diesel generator module 200 can be transmitted to adapter 100 through first port 31. Second port 33 is a port in adapter 100 that can be connected to power distribution module 300. Second port 33 may include at least a power transmission port, so that electrical energy in adapter 100 (such as electrical energy input from diesel generator module 200) can be transmitted to power distribution module 300 through second port 33. The third port 35 is a port in the adapter 100 that can be connected to the energy storage converter 400. The third port 35 may include at least a power transmission port, so that electrical energy in the adapter 100 (such as electrical energy input from the diesel generator module 200) can be transmitted to the energy storage converter 400 through the third port 35.

[0043] The first connection unit 50 is an electronic component or combination of electronic components inside the adapter 100 used to achieve electrical connection, signal conversion, and / or protocol adaptation between the first port 31 and the second port 33. The first connection unit 50 can ensure efficient, stable, and secure transmission of electrical power and / or data between the first port 31 and the second port 33.

[0044] The second connection unit 70 is an electronic component or combination of electronic components inside the adapter 100 used to achieve electrical connection, signal conversion, and / or protocol adaptation between the first port 31 and the third port 35. The second connection unit 70 can ensure efficient, stable, and secure transmission of electrical power and / or data between the first port 31 and the third port 35.

[0045] In the adapter 100 of this application embodiment, the first port 31 can be connected to the diesel generator module 200, the third port 35 can be connected to the energy storage converter 400, and the second connection unit 70 is connected between the first connection unit 50 and the third port 35. The second connection unit 70 can convert the AC power at the first port 31 to DC power and transmit the DC power to the third port 35. Therefore, compared with the parallel connection of the AC output terminal of the generator and the AC output terminal of the energy storage converter 400 in the related art, the adapter 100 in this application can connect the third port 31 to the third port 35. 35 transmits DC power to the energy storage converter 400. Since DC power has no frequency issues, the energy storage converter 400 does not need to track the fluctuations of the diesel generator module 200 in real time. For example, the energy storage converter 400 does not need to track the frequency fluctuations of the diesel generator module 200 in real time, avoiding frequent triggering of out-of-step protection or power oscillations of the energy storage converter 400 due to the fluctuations of the diesel generator module 200 in real time. This reduces the interference caused by the unstable frequency or voltage fluctuations of the diesel generator module 200, and improves the stability and reliability of the energy storage system 1000.

[0046] In addition, the adapter 100 enables the energy storage system 1000 to be compatible with diesel generator modules 200 of different brands and models. Thus, when the energy storage system 1000 is connected to diesel generator modules 200 of different brands and models, there is no need to perform adaptation tests one by one, thereby improving the connection efficiency and reducing labor costs.

[0047] Please see Figure 2 and Figure 3 In some embodiments, the first port 31 includes four first interfaces 311, and the second port 33 includes four second interfaces 331, with the four first interfaces 311 and the four second interfaces 331 corresponding to each other. The first connection unit 50 includes a first phase line 51, a second phase line 52, a first connector 53, and a second connector 54. The first phase line 51, the second phase line 52, the first connector 53, and the second connector 54 are respectively connected between a pair of first interfaces 311 and second interfaces 331. The first phase line 51 and the second phase line 52 are both configured to transmit AC power from the first port 31 to the second port 33. The first connector 53 is configured to form a current return path, and the second connector 54 is configured to be grounded.

[0048] Specifically, in the above embodiment, the four first interfaces 311 can be L1, L2, Gen N, and Gen PE, respectively, and the four second interfaces 331 can be L3, L4, SG N, and SG PE, respectively. The first phase wire 51 is connected between L1 and L3, the second phase wire 52 is connected between L2 and L4, the first connector 53 is connected between Gen N and SG N, and the second connector 54 is connected between Gen PE and SG PE. The first phase wire 51, the second phase wire 52, the first connector 53, and the second connector 54 are all wire harnesses used for conducting electricity, and the materials of the phase wires, the second phase wire 52, the first connector 53, and the second connector 54 include at least one of copper, aluminum, steel, and silver. In this configuration, with the diesel generator module 200 connected to the first port 31 and the power distribution module 300 connected to the second port 33, and the diesel generator module 200 operating stably, the electrical energy from the diesel generator module 200 can be transmitted to the power distribution module 300 via the first phase line 51 or the second phase line 52, and then returned to the diesel generator module 200 via the first connector 53, thus forming a closed loop. The second connector 54 provides safety protection; in the event of leakage, the current can be conducted to the ground through the second connector 54 to prevent electric shock and improve the safety of the adapter 100.

[0049] In some embodiments, the first connection unit 50 further includes two first circuit breakers 55, which are respectively disposed on the first phase line 51 and the second phase line 52, and the first circuit breakers 55 are in a normally closed state.

[0050] Specifically, in the above embodiment, the first circuit breaker 55 can be a miniature circuit breaker (MCB). The first circuit breaker 55 is an automatic switching device for circuit protection, capable of automatically cutting off current when overload, short circuit, or ground fault is detected, preventing equipment damage or fire risks. After disconnecting the circuit, the first circuit breaker 55 forms a clear disconnection point, ensuring maintenance safety. The current rating of the first circuit breaker 55 can be 20A-100A. For example, when the current on the first phase line 51 exceeds the rated value, the first circuit breaker 55 can trip. The first circuit breaker 55 supports manual operation, i.e., it supports manual opening or closing.

[0051] The system includes two first circuit breakers 55, each connected to a first phase line 51 and a second phase line 52. One circuit breaker 55 is connected in series with the first phase line 51, and the other is connected in series with the second phase line 52. This allows the two circuit breakers 55 to independently protect the first phase line 51 and the second phase line 52, preventing unidirectional faults from affecting the entire system. This ensures fault isolation while improving system reliability. The first circuit breakers 55 are normally closed, meaning they remain closed (conducting current) under normal operating conditions and only trip (disconnect) automatically during a fault.

[0052] In some embodiments, the two first circuit breakers 55 are electrically connected to each other, so that in the event of a fault, the two first circuit breakers 55 can disconnect simultaneously, preventing damage to equipment (such as distribution boxes, electrical equipment, etc.) caused by single-phase power supply and improving the operational stability of the energy storage system 1000. For example, when an overcurrent or short circuit fault occurs on the first phase line 51, the first circuit breaker 55 on the first phase line 51 disconnects, and at the same time, the first circuit breaker 55 on the second phase line 52 is triggered to disconnect synchronously through a connection signal, thereby completely cutting off the fault circuit and effectively achieving fault isolation.

[0053] Please see Figure 2 and Figure 3 In some embodiments, the first connector 53 is a parallel connection and the second connector 54 is a parallel connection. This facilitates the expansion of the energy storage system 1000. That is, when the energy storage system 1000 includes multiple diesel generator modules 200, the neutral wires of the multiple diesel generator modules 200 can be connected to the first connector 53, and the grounding wires of the multiple diesel generator modules 200 can be connected to the second connector 54.

[0054] In some embodiments, the voltage difference between the first phase line 51 and the second phase line 52 is 240V, the voltage difference between the first phase line 51 and the first connector 53 is 120V, and the voltage difference between the second phase line 52 and the first connector 53 is 120V.

[0055] Specifically, in the above embodiment, the phase difference between the first phase line 51 and the second phase line 52 is 180°, and the first phase line 51 and the second phase line 52 are out of phase. It should be noted that the voltage in this embodiment is applicable to North American standards. Of course, it is understood that, depending on regional standards and application scenarios, the voltage difference between the first phase line 51 and the second phase line 52 can be other values, such as 380V, etc., which will not be listed here.

[0056] Please see Figure 1 and Figure 3In some embodiments, the third port 35 includes a first DC negative interface 351, a first DC positive interface 353, a second DC negative interface 355, and a second DC positive interface 357. The second connection unit 70 includes a first connection line 71, a second connection line 72, a third connection line 73, and a fourth connection line 74. The first connection line 71 connects the first phase line 51 of the first connection unit 50 and the first DC negative interface 351. A first diode 75 is provided on the first connection line 71, and the anode of the first diode 75 is connected to the first DC negative interface 351. The second connection line 72 connects the cathode of the first diode 75 and the first DC positive interface 353. The third connection line 73 connects the second phase line 52 of the first connection unit 50 and the second DC negative interface 355. A second diode 76 is provided on the third connection line 73, and the anode of the second diode 76 is connected to the second DC negative interface 355. The fourth connection line 74 is connected between the negative terminal of the second diode 76 and the second DC positive terminal interface 357; wherein, the second connection line 72 is configured to form a current loop together with the third connection line 73, and the fourth connection line 74 is configured to form a current loop together with the first connection line 71.

[0057] Specifically, in the above embodiments, the first DC negative interface 351, the first DC positive interface 353, the second DC negative interface 355, and the second DC positive interface 357 are all interfaces on the adapter 100 that can be connected to the DC input terminal of the energy storage converter 400. The first connecting wire 71, the second connecting wire 72, the third connecting wire 73, and the fourth connecting wire 74 are all wire harnesses used for conducting electricity in the adapter 100, and the materials of the first connecting wire 71, the second connecting wire 72, the third connecting wire 73, and the fourth connecting wire 74 include at least one of the following materials: copper, aluminum, steel, and silver. The first connecting line 71 is connected between the first phase line 51 and the first DC negative terminal interface 351. Specifically, one end of the first connecting line 71 is connected between L1 on the first phase line 51 and the first circuit breaker 55, and the other end of the first connecting line 71 is connected to the first DC negative terminal interface 351. The third connecting line 73 is connected between the second phase line 52 and the second DC negative terminal interface 355. Specifically, one end of the third connecting line 73 is connected between L2 on the second phase line 52 and the first circuit breaker 55, and the other end of the third connecting line 73 is connected to the second DC negative terminal interface 355. The first diode 75 and the second diode 76 are both semiconductor electronic components with unidirectional conductivity. Their core function is to allow current to pass in one direction, that is, to allow current from the positive terminal (anode) to the negative terminal (cathode), while blocking reverse current. It should be noted that in some embodiments, the first diode 75 and the second diode 76 can both be rectifier diodes, etc.

[0058] The second connecting line 72 is configured to form a current loop together with the third connecting line 73, and the fourth connecting line 74 is configured to form a current loop together with the first connecting line 71. Thus, the electrical energy of the diesel generator module 200 can flow to the energy storage converter 400 through the first connecting line 71, the second connecting line 72, and the first DC positive interface 353 in sequence, and then flow back to the diesel generator module 200 through the second DC negative interface 355, the third connecting line 73, and the second diode 76 on the third connecting line 73 in sequence, thereby forming a closed loop; or, the electrical energy of the diesel generator module 200 can flow to the energy storage converter 400 through the third connecting line 73, the fourth connecting line 74, and the second DC positive interface 357 in sequence, and then flow back to the diesel generator module 200 through the first DC negative interface 351, the first connecting line 71, and the first diode 75 on the first connecting line 71 in sequence, thereby forming a closed loop.

[0059] For example, when the diesel generator module 200 is operating stably, it can output AC power. Taking the positive cycle of the AC power as an example, during the positive half-cycle of the sine wave, the electrical energy of the diesel generator module 200 flows to the energy storage converter 400 through the first connecting line 71, the second connecting line 72, and the first DC positive interface 353 in sequence, and then flows back to the diesel generator module 200 through the second DC negative interface 355, the third connecting line 73, and the second diode 76 on the third connecting line 73 in sequence, thus forming a closed loop. During the negative half-cycle of the sine wave, the electrical energy of the diesel generator module 200 flows to the energy storage converter 400 through the third connecting line 73, the fourth connecting line 74, and the second DC positive interface 357 in sequence, and then flows back to the diesel generator module 200 through the first DC negative interface 351, the first connecting line 71, and the first diode 75 on the first connecting line 71 in sequence, thus forming a closed loop. Therefore, the electrical energy transmitted to the energy storage converter 400 through the third port 35 is DC, which eliminates the need for the energy storage converter 400 to track the fluctuations of the diesel generator module 200 in real time, thus avoiding frequent triggering of out-of-step protection or power oscillation. This reduces the interference caused by the unstable frequency or voltage fluctuations of the diesel generator module 200, and improves the stability and reliability of the energy storage system 1000.

[0060] Please combine Figure 3 In some embodiments, the second connection unit 70 further includes a fifth connection line 77, the opposite ends of which are connected to the positive terminals of the first diode 75 and the second diode 76, respectively. The fifth connection line 77 is configured to make the first diode 75 and the second diode 76 have the same potential.

[0061] Specifically, one end of the fifth connecting line 77 is electrically connected between the positive terminal of the first diode 75 and the first DC negative terminal interface 351, and the other end of the second connecting line 72 is electrically connected between the positive terminal of the second diode 76 and the second DC negative terminal interface 355. This makes the first diode 75 and the second diode 76 have the same potential, which is beneficial for achieving full-wave rectification.

[0062] In some embodiments, the second connection unit 70 further includes two second circuit breakers 78, which are respectively located on the first connection line 71 and the third connection line 73, and the second circuit breakers 78 are in a normally closed state.

[0063] Specifically, in the above embodiment, the second circuit breaker 78 can be a miniature circuit breaker (MCB). The second circuit breaker 78 is an automatic switching device for circuit protection, capable of automatically cutting off current when overload, short circuit, or ground fault is detected, preventing equipment damage or fire risks. After disconnecting the circuit, the second circuit breaker 78 forms a clear disconnection point, ensuring maintenance safety. The current rating of the second circuit breaker 78 can be 20A. For example, when the current on the first connecting line 71 exceeds the rated value, the second circuit breaker 78 can trip. The second circuit breaker 78 also supports manual operation, i.e., it supports manual opening or closing.

[0064] Specifically, the second circuit breaker 78 on the first connecting line 71 can be located between the connection point of the first connecting line 71 and the first phase line 51, and between the connection point of the first connecting line 71 and the second connecting line 72. Similarly, the second circuit breaker 78 on the third connecting line 73 can be located between the connection point of the third connecting line 73 and the second phase line 52, and between the connection point of the third connecting line 73 and the fourth connecting line 74. In this way, the two second circuit breakers 78 can independently protect the first connecting line 71 and the third connecting line 73, preventing a unidirectional fault from affecting the entire system. This ensures fault isolation while also improving system reliability. The second circuit breaker 78 is normally closed, meaning it remains closed (conducting current) under normal operating conditions and only trips (disconnects) automatically during a fault.

[0065] In some embodiments, the two second circuit breakers 78 are electrically connected to each other, so that both second circuit breakers 78 can disconnect simultaneously in the event of a fault. For example, when a fault such as overcurrent or short circuit occurs on the first connection line 71, the second circuit breaker 78 on the first connection line 71 disconnects, and at the same time, the second circuit breaker 78 on the third connection line 73 is triggered to disconnect synchronously through a connection signal, thereby completely cutting off the fault circuit and effectively achieving fault isolation.

[0066] In the description of this specification, the references to terms such as "some embodiments," "in one example," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the described embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An adapter for an energy storage system, characterized in that, The energy storage system includes a diesel generator module, a power distribution module, and an energy storage converter; the adapter includes: ontology; A connection port is provided on the main body. The connection port includes a first port, a second port and a third port. The first port is configured to connect to the diesel generator module, the second port is configured to connect to the power distribution module, and the third port is configured to connect to the energy storage converter. A first connection unit is connected between the first port and the second port, and the first connection unit is configured to transmit alternating current from the first port to the second port; and A second connection unit is connected between the first connection unit and the third port. The second connection unit is configured to convert the alternating current at the first port into direct current and transmit the direct current to the third port.

2. The adapter according to claim 1, characterized in that, The first port includes four first interfaces, and the second port includes four second interfaces, with the four first interfaces and four second interfaces corresponding to each other. The first connection unit includes a first phase line, a second phase line, a first connector, and a second connector. The first phase line, the second phase line, the first connector, and the second connector are respectively connected between a pair of first interfaces and a pair of second interfaces. The first phase line and the second phase line are both configured to transmit AC power from the first port to the second port. The first connector is configured to form a current return path, and the second connector is configured to be grounded.

3. The adapter according to claim 2, characterized in that, The first connection unit further includes two first circuit breakers, which are respectively located on the first phase line and the second phase line, and the first circuit breakers are in a normally closed state.

4. The adapter according to claim 2, characterized in that, The first connector is a parallel machine busbar, and the second connector is a parallel machine busbar.

5. The adapter according to claim 2, characterized in that, The voltage difference between the first phase line and the second phase line is 240V, the voltage difference between the first phase line and the first connector is 120V, and the voltage difference between the second phase line and the first connector is 120V.

6. The adapter according to any one of claims 1-5, characterized in that, The third port includes a first DC negative interface, a first DC positive interface, a second DC negative interface, and a second DC positive interface; the second connection unit includes: A first connecting line is connected between the first phase line of the first connecting unit and the first DC negative terminal interface. A first diode is provided on the first connecting line, and the positive terminal of the first diode is connected to the first DC negative terminal interface. The second connecting line is connected between the negative terminal of the first diode and the first DC positive terminal interface; A third connecting line is connected between the second phase line of the first connecting unit and the second DC negative terminal interface. A second diode is provided on the third connecting line, and the positive terminal of the second diode is connected to the second DC negative terminal interface. The fourth connection line is connected between the negative terminal of the second diode and the second DC positive terminal interface; wherein the second connection line is configured to form a current loop together with the third connection line, and the fourth connection line is configured to form a current loop together with the first connection line.

7. The adapter according to claim 6, characterized in that, The second connection unit further includes a fifth connection line, the opposite ends of which are respectively connected to the positive terminals of the first diode and the second diode, and the fifth connection line is configured to make the first diode and the second diode have the same potential.

8. The adapter according to claim 6, characterized in that, The second connection unit further includes two second circuit breakers, which are respectively located on the first connection line and the third connection line, and the second circuit breakers are in a normally closed state.

9. An energy storage system, characterized in that, The device includes a diesel generator module, a power distribution module, an energy storage converter, and an adapter as described in any one of claims 1-8, wherein the diesel generator module, the power distribution module, and the energy storage converter are all connected to the adapter.

10. The energy storage system according to claim 9, characterized in that, The power distribution module is equipped with a relay, which is configured to be able to switch on and off to control the power transmission between the diesel generator module and the power distribution module, or to control the power transmission between the diesel generator module and the energy storage converter.

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