Multi-mode energy storage charging pile

Abstract

The utility model provides a multi-mode energy storage charging pile, which is used for supplying power to a power battery and comprises a photovoltaic module, an energy storage battery, a first DC-DC circuit and a control module, and the first DC-DC circuit comprises a first field effect transistor, a third field effect transistor, a fourth field effect transistor, a first inductor, a second inductor and a first capacitor. By arranging a first field-effect tube, a third field-effect tube and a fourth field-effect tube, the following modes can be included: 1, only the third field-effect tube is electrified, and at the moment, an energy storage battery can be charged through a photovoltaic module; 2, only the first field effect transistor is electrified, and power is supplied to the power battery through the photovoltaic module; 3, only the first field-effect tube and the third field-effect tube are electrified, and at the moment, the photovoltaic module supplies power to the energy storage battery and the power battery; 4, only the fourth field-effect tube and the first field-effect tube are electrified, and at the moment, the photovoltaic module and the energy storage battery supply power to the power battery; and 5, power can be supplied to the power battery through a power grid.

Description

Technical Field

[0001] The utility model relates to the technical field of charging, and specifically to a multi-mode energy storage charging pile. Background Art

[0002] A charging pile is a device that replenishes power for the power battery of an electric vehicle. Its function is similar to that of a gas pump in a gas station. It can be fixed on the ground or on a wall and installed in public buildings (charging stations, shopping malls, public parking lots, etc.) and residential parking lots. It can charge various types of electric vehicles according to the adjusted voltage and current.

[0003] In the prior art, the input end of the charging pile is generally directly connected to the AC power grid, and the output end is equipped with a charging plug for charging electric vehicles. Since most of the power grid is powered by thermal power, in order to adapt to the country's low-carbon policy, how to make the charging pile use low-carbon energy has become an important issue. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes a multi-mode energy storage charging pile, which can use photovoltaic energy to charge power batteries and meet low-carbon requirements.

[0005] The embodiment of the utility model provides a multi-mode energy storage charging pile for supplying power to a power battery, comprising a photovoltaic module, an energy storage battery, a first DC-DC circuit and a control module, wherein the first DC-DC circuit is electrically connected to a power grid;

[0006] The first DC-DC circuit includes a first field effect transistor M1, a third field effect transistor M3, a fourth field effect transistor M4, a first inductor L1, a second inductor L2 and a first capacitor C1.

[0007] One end of the first inductor L1 is electrically connected to the positive electrode of the photovoltaic module and the output end of the fourth field effect transistor M4, and the other end is electrically connected to the input end of the first field effect transistor M1;

[0008] The first end of the second inductor L2 is electrically connected to the output end of the first field effect transistor M1, the second end of the second inductor L2 is electrically connected to the negative electrode of the photovoltaic module and the negative electrode of the energy storage module, and the second inductor L2 is connected in parallel with the first capacitor C1 to output a supply voltage;

[0009] The input end of the third field effect transistor M3 is electrically connected to the positive electrode of the photovoltaic module, the output end of the third field effect transistor M3 is electrically connected to the positive electrode of the energy storage battery, the input end of the fourth field effect transistor M4 is electrically connected to the positive electrode of the energy storage battery, and the controlled end of the first field effect transistor M1, the controlled end of the third field effect transistor M3 and the controlled end of the fourth field effect transistor M4 are electrically connected to the control module.

[0010] The above technical solution of the utility model has at least one of the following advantages or beneficial effects:

[0011] By setting the first field effect transistor M1, the third field effect transistor M3, and the fourth field effect transistor M4, the photovoltaic energy can be utilized by switching each field effect transistor M1, and at least the following modes are included: 1. Only the third field effect transistor M3 is energized, and the energy storage battery can be charged through the photovoltaic module; 2. Only the first field effect transistor M1 is energized, and the second inductor and the first capacitor can be powered by the photovoltaic module, and the power battery is powered by the output voltage; 3. Only the first field effect transistor M1 and the third field effect transistor M3 are energized, and the photovoltaic module supplies power to both the energy storage battery and the power battery; 4. Only the fourth field effect transistor M4 and the first field effect transistor M1 are energized, and the photovoltaic module and the energy storage battery supply power to the power battery; 5. When the power of the photovoltaic and energy storage batteries is insufficient, the power battery can also be powered by the power grid.

[0012] Furthermore, the first DC-DC circuit further includes a second field effect transistor M2 and a second diode D2;

[0013] The input end of the second field effect transistor M2 is electrically connected to the positive electrode of the energy storage battery, the output end of the second field effect transistor M2 is electrically connected to the negative electrode of the second diode D2 and the first end of the second inductor L2, the positive electrode of the second diode D2 is electrically connected to the output end of the first field effect transistor M1 and the first end of the first capacitor C1, the second end of the second inductor L2 is electrically connected to the second end of the first capacitor C1, and the controlled end of the second field effect transistor M2 is electrically connected to the control module.

[0014] Furthermore, the first DC-DC circuit also includes a first diode D1, the anode of the first diode D1 is electrically connected to the anode of the photovoltaic module, and the cathode of the first diode D1 is electrically connected to the input end of the third field effect transistor M3 and the first end of the first inductor L1.

[0015] Furthermore, the first DC-DC circuit also includes a third inductor L3, a first end of the third inductor L3 is electrically connected to the output end of the third field effect transistor M3, and a second end of the third inductor L3 is electrically connected to the positive electrode of the energy storage battery.

[0016] Furthermore, the first DC-DC circuit also includes a fifth diode D5, a zero capacitor C0 and a load resistor R, the positive electrode of the fifth diode D5 is electrically connected to the second end of the first inductor L1, the negative electrode of the fifth diode D5 is electrically connected to the first end of the zero capacitor C0 and the first end of the load resistor R, and the second end of the zero capacitor C0 and the second end of the load resistor R are electrically connected to the negative electrode of the photovoltaic module.

[0017] Furthermore, the first DC-DC circuit further includes a fourth diode D4, an anode of the fourth diode D4 is electrically connected to the output end of the fourth field effect transistor M4, and a cathode of the fourth diode D4 is electrically connected to the first end of the first inductor L1.

[0018] Furthermore, the second DC-DC circuit includes a transformer, the transformer includes a fourth inductor L4 and a fifth inductor L5, the fourth inductor L4 and the fifth inductor L5 are arranged opposite to each other, the fourth inductor L4 is electrically connected to the output voltage of the first DC-DC circuit, and the fifth inductor L5 is used to output the voltage required by the power battery.

[0019] Further, the second DC-DC circuit further includes a fifth field effect transistor M5, a sixth field effect transistor M6, a seventh field effect transistor M7, an eighth field effect transistor M8, a ninth field effect transistor M9, a tenth field effect transistor M10, an eleventh field effect transistor M11 and a twelfth field effect transistor M12;

[0020] The first end of the fourth inductor L4 is electrically connected to the output end of the fifth field effect transistor M5 and the input end of the seventh field effect transistor M7, the second end of the fourth inductor L4 is electrically connected to the output end of the sixth field effect transistor M6 and the input end of the eighth field effect transistor M8, the input end of the fifth field effect transistor M5 and the input end of the sixth field effect transistor M6 are electrically connected to the positive electrode of the output voltage of the first DC-DC circuit, and the output end of the seventh field effect transistor M7 and the output end of the seventh field effect transistor M7 are electrically connected to the negative electrode of the output voltage of the first DC-DC circuit;

[0021] The first end of the fifth inductor L5 is electrically connected to the output end of the ninth field effect transistor M9 and the input end of the eleventh field effect transistor M11, the second end of the fifth inductor L5 is electrically connected to the output end of the tenth field effect transistor M10 and the input end of the twelfth field effect transistor M12, the input end of the ninth field effect transistor M9 and the input end of the tenth field effect transistor M10 are electrically connected to the positive electrode of the power battery, and the output end of the eleventh field effect transistor M11 and the output end of the twelfth field effect transistor M12 are electrically connected to the negative electrode of the power battery;

[0022] The controlled ends of the fifth field effect transistor M5, the sixth field effect transistor M6, the seventh field effect transistor M7, the eighth field effect transistor M8, the ninth field effect transistor M9, the tenth field effect transistor M10, the eleventh field effect transistor M11 and the twelfth field effect transistor M12 are electrically connected to the control module.

[0023] Furthermore, the second DC-DC circuit further includes an input capacitor Cin and an output capacitor Cout, the input capacitor Cin is connected in parallel with the output voltage of the first DC-DC circuit, and the output capacitor Cout is connected in parallel with the power battery.

[0024] Furthermore, the transformer further includes a series inductor Ls, and the series inductor Ls is connected in series with the fourth inductor L4. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] Figure 1 A schematic diagram of a module of a multi-mode energy storage charging pile provided by the utility model;

[0027] Figure 2 A circuit diagram of a first DC-DC circuit provided by the utility model;

[0028] Figure 3 This is a circuit diagram of a second DC-DC circuit provided by the utility model. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0032] In this specification, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being “above”, “above”, and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this application, 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, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] The utility model provides a stable voltage output circuit and a charging line, which can help to compensate for voltage drop loss, reach the normal voltage required by the powered equipment, and pass the charging test certification.

[0035] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings.

[0036] In one embodiment, referring to Figure 1-3 , Figure 1 A circuit diagram of a first DC-DC circuit provided by an embodiment of the utility model, Figure 2 A circuit diagram of a first DC-DC circuit provided in one embodiment of the utility model, Figure 3 A circuit diagram of a second DC-DC circuit provided by an embodiment of the utility model.

[0037] The utility model provides a multi-mode energy storage charging pile for supplying power to a power battery, comprising a photovoltaic module, an energy storage battery, a first DC-DC circuit and a control module, wherein the first DC-DC circuit is electrically connected to a power grid;

[0038] The first DC-DC circuit includes a first field effect transistor M1, a third field effect transistor M3, a fourth field effect transistor M4, a first inductor L1, a second inductor L2 and a first capacitor C1.

[0039] One end of the first inductor L1 is electrically connected to the positive electrode of the photovoltaic module and the output end of the fourth field effect transistor M4, and the other end is electrically connected to the input end of the first field effect transistor M1;

[0040] The first end of the second inductor L2 is electrically connected to the output end of the first field effect transistor M1, the second end of the second inductor L2 is electrically connected to the negative electrode of the photovoltaic module and the negative electrode of the energy storage module, and the second inductor L2 is connected in parallel with the first capacitor C1 to output a supply voltage;

[0041] The input end of the third field effect transistor M3 is electrically connected to the positive electrode of the photovoltaic module, the output end of the third field effect transistor M3 is electrically connected to the positive electrode of the energy storage battery, the input end of the fourth field effect transistor M4 is electrically connected to the positive electrode of the energy storage battery, and the controlled end of the first field effect transistor M1, the controlled end of the third field effect transistor M3 and the controlled end of the fourth field effect transistor M4 are electrically connected to the control module.

[0042] Specifically, by setting the first field effect transistor M1, the third field effect transistor M3, and the fourth field effect transistor M4, the utilization of photovoltaic energy can be achieved by switching each field effect transistor M1, which at least includes the following modes: 1. Only the third field effect transistor M3 is energized, and the energy storage battery can be charged through the photovoltaic module; 2. Only the first field effect transistor M1 is energized, and the second inductor and the first capacitor can be powered by the photovoltaic module, and the power battery is powered by the output voltage; 3. Only the first field effect transistor M1 and the third field effect transistor M3 are energized, and the photovoltaic module supplies power to both the energy storage battery and the power battery; 4. Only the fourth field effect transistor M4 and the first field effect transistor M1 are energized, and the photovoltaic module and the energy storage battery supply power to the power battery; 5. When the power of the photovoltaic and energy storage batteries is insufficient, the power battery can also be powered by the power grid.

[0043] Preferably, the first DC-DC circuit further includes a second field effect transistor M2 and a second diode D2;

[0044] The input end of the second field effect transistor M2 is electrically connected to the positive electrode of the energy storage battery, the output end of the second field effect transistor M2 is electrically connected to the negative electrode of the second diode D2 and the first end of the second inductor L2, the positive electrode of the second diode D2 is electrically connected to the output end of the first field effect transistor M1 and the first end of the first capacitor C1, the second end of the second inductor L2 is electrically connected to the second end of the first capacitor C1, and the controlled end of the second field effect transistor M2 is electrically connected to the control module.

[0045] Specifically, by providing the second field effect transistor M2, when the photovoltaic module cannot be used at night, only the second field effect transistor M2 is powered on, and at this time, the power battery can be powered by the energy storage battery.

[0046] Preferably, the first DC-DC circuit further includes a first diode D1, the anode of the first diode D1 is electrically connected to the anode of the photovoltaic module, and the cathode of the first diode D1 is electrically connected to the input end of the third field effect transistor M3 and the first end of the first inductor L1.

[0047] Preferably, the first DC-DC circuit further includes a third inductor L3, a first end of the third inductor L3 is electrically connected to the output end of the third field effect transistor M3, and a second end of the third inductor L3 is electrically connected to the positive electrode of the energy storage battery.

[0048] Preferably, the first DC-DC circuit also includes a fifth diode D5, a zero capacitor C0 and a load resistor R, the positive electrode of the fifth diode D5 is electrically connected to the second end of the first inductor L1, the negative electrode of the fifth diode D5 is electrically connected to the first end of the zero capacitor C0 and the first end of the load resistor R, and the second end of the zero capacitor C0 and the second end of the load resistor R are electrically connected to the negative electrode of the photovoltaic module.

[0049] Preferably, the first DC-DC circuit further includes a fourth diode D4, an anode of the fourth diode D4 is electrically connected to the output end of the fourth field effect transistor M4, and a cathode of the fourth diode D4 is electrically connected to the first end of the first inductor L1.

[0050] Preferably, the second DC-DC circuit includes a transformer, the transformer includes a fourth inductor L4 and a fifth inductor L5, the fourth inductor L4 and the fifth inductor L5 are arranged opposite to each other, the fourth inductor L4 is electrically connected to the output voltage of the first DC-DC circuit, and the fifth inductor L5 is used to output the voltage required by the power battery.

[0051] Preferably, the second DC-DC circuit further includes a fifth field effect transistor M5, a sixth field effect transistor M6, a seventh field effect transistor M7, an eighth field effect transistor M8, a ninth field effect transistor M9, a tenth field effect transistor M10, an eleventh field effect transistor M11 and a twelfth field effect transistor M12;

[0052] The first end of the fourth inductor L4 is electrically connected to the output end of the fifth field effect transistor M5 and the input end of the seventh field effect transistor M7, the second end of the fourth inductor L4 is electrically connected to the output end of the sixth field effect transistor M6 and the input end of the eighth field effect transistor M8, the input end of the fifth field effect transistor M5 and the input end of the sixth field effect transistor M6 are electrically connected to the positive electrode of the output voltage of the first DC-DC circuit, and the output end of the seventh field effect transistor M7 and the output end of the seventh field effect transistor M7 are electrically connected to the negative electrode of the output voltage of the first DC-DC circuit;

[0053] The first end of the fifth inductor L5 is electrically connected to the output end of the ninth field effect transistor M9 and the input end of the eleventh field effect transistor M11, the second end of the fifth inductor L5 is electrically connected to the output end of the tenth field effect transistor M10 and the input end of the twelfth field effect transistor M12, the input end of the ninth field effect transistor M9 and the input end of the tenth field effect transistor M10 are electrically connected to the positive electrode of the power battery, and the output end of the eleventh field effect transistor M11 and the output end of the twelfth field effect transistor M12 are electrically connected to the negative electrode of the power battery;

[0054] The controlled ends of the fifth field effect transistor M5, the sixth field effect transistor M6, the seventh field effect transistor M7, the eighth field effect transistor M8, the ninth field effect transistor M9, the tenth field effect transistor M10, the eleventh field effect transistor M11 and the twelfth field effect transistor M12 are electrically connected to the control module.

[0055] In one embodiment, the second DC-DC circuit is a bidirectional voltage conversion circuit. When the fifth field effect transistor M5, the eighth field effect transistor M8, the ninth field effect transistor M9 and the twelfth field effect transistor M12 are powered on, the power battery can be powered by the voltage output by the first DC-DC circuit; when the sixth field effect transistor M6, the seventh field effect transistor M7, the tenth field effect transistor M10 and the eleventh field effect transistor M11 are powered on, the remaining power of the power battery can be powered to the first DC-DC circuit, specifically, the energy storage battery of the first DC-DC circuit.

[0056] Preferably, the second DC-DC circuit further includes an input capacitor Cin and an output capacitor Cout, the input capacitor Cin is connected in parallel with the output voltage of the first DC-DC circuit, and the output capacitor Cout is connected in parallel with the power battery.

[0057] Preferably, the transformer further includes a series inductor Ls, and the series inductor Ls is connected in series with the fourth inductor L4.

[0058] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0059] copy

[0060] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present invention. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A multi-mode energy storage charging pile, used to supply power to a power battery, characterized in that: It includes a photovoltaic module, an energy storage battery, a first DC-DC circuit and a control module, wherein the first DC-DC circuit is electrically connected to a power grid; The first DC-DC circuit includes a first field effect transistor M1, a third field effect transistor M3, a fourth field effect transistor M4, a first inductor L1, a second inductor L2 and a first capacitor C1; One end of the first inductor L1 is electrically connected to the positive electrode of the photovoltaic module and the output end of the fourth field effect transistor M4, and the other end is electrically connected to the input end of the first field effect transistor M1; The first end of the second inductor L2 is electrically connected to the output end of the first field effect transistor M1, the second end of the second inductor L2 is electrically connected to the negative electrode of the photovoltaic module and the negative electrode of the energy storage module, and the second inductor L2 is connected in parallel with the first capacitor C1 to output a supply voltage; The input end of the third field effect transistor M3 is electrically connected to the positive electrode of the photovoltaic module, the output end of the third field effect transistor M3 is electrically connected to the positive electrode of the energy storage battery, the input end of the fourth field effect transistor M4 is electrically connected to the positive electrode of the energy storage battery, and the controlled end of the first field effect transistor M1, the controlled end of the third field effect transistor M3 and the controlled end of the fourth field effect transistor M4 are electrically connected to the control module.

2. The multi-mode energy storage charging pile according to claim 1, characterized in that: The first DC-DC circuit also includes a second field effect transistor M2 and a second diode D2; The input end of the second field effect transistor M2 is electrically connected to the positive electrode of the energy storage battery, the output end of the second field effect transistor M2 is electrically connected to the negative electrode of the second diode D2 and the first end of the second inductor L2, the positive electrode of the second diode D2 is electrically connected to the output end of the first field effect transistor M1 and the first end of the first capacitor C1, the second end of the second inductor L2 is electrically connected to the second end of the first capacitor C1, and the controlled end of the second field effect transistor M2 is electrically connected to the control module.

3. The multi-mode energy storage charging pile according to claim 1, characterized in that: The first DC-DC circuit further includes a first diode D1 , an anode of the first diode D1 is electrically connected to the anode of the photovoltaic module, and a cathode of the first diode D1 is electrically connected to the input end of the third field effect transistor M3 and the first end of the first inductor L1 .

4. The multi-mode energy storage charging pile according to claim 1, characterized in that: The first DC-DC circuit further includes a third inductor L3, a first end of the third inductor L3 is electrically connected to the output end of the third field effect transistor M3, and a second end of the third inductor L3 is electrically connected to the positive electrode of the energy storage battery.

5. The multi-mode energy storage charging pile according to claim 1, characterized in that: The first DC-DC circuit also includes a fifth diode D5, a zero capacitor C0 and a load resistor R, the positive electrode of the fifth diode D5 is electrically connected to the second end of the first inductor L1, the negative electrode of the fifth diode D5 is electrically connected to the first end of the zero capacitor C0 and the first end of the load resistor R, and the second end of the zero capacitor C0 and the second end of the load resistor R are electrically connected to the negative electrode of the photovoltaic module.

6. The multi-mode energy storage charging pile according to claim 1, characterized in that: The first DC-DC circuit further includes a fourth diode D4 , an anode of the fourth diode D4 is electrically connected to the output end of the fourth field effect transistor M4 , and a cathode of the fourth diode D4 is electrically connected to the first end of the first inductor L1 .

7. The multi-mode energy storage charging pile according to claim 1, characterized in that: It also includes a second DC-DC circuit, which includes a transformer. The transformer includes a fourth inductor L4 and a fifth inductor L5. The fourth inductor L4 and the fifth inductor L5 are arranged opposite to each other. The fourth inductor L4 is electrically connected to the output voltage of the first DC-DC circuit, and the fifth inductor L5 is used to output the voltage required by the power battery.

8. The multi-mode energy storage charging pile according to claim 7, characterized in that: The second DC-DC circuit further includes a fifth field effect transistor M5, a sixth field effect transistor M6, a seventh field effect transistor M7, an eighth field effect transistor M8, a ninth field effect transistor M9, a tenth field effect transistor M10, an eleventh field effect transistor M11 and a twelfth field effect transistor M12; The first end of the fourth inductor L4 is electrically connected to the output end of the fifth field effect transistor M5 and the input end of the seventh field effect transistor M7, the second end of the fourth inductor L4 is electrically connected to the output end of the sixth field effect transistor M6 and the input end of the eighth field effect transistor M8, the input end of the fifth field effect transistor M5 and the input end of the sixth field effect transistor M6 are electrically connected to the positive electrode of the output voltage of the first DC-DC circuit, and the output end of the seventh field effect transistor M7 and the output end of the seventh field effect transistor M7 are electrically connected to the negative electrode of the output voltage of the first DC-DC circuit; The first end of the fifth inductor L5 is electrically connected to the output end of the ninth field effect transistor M9 and the input end of the eleventh field effect transistor M11, the second end of the fifth inductor L5 is electrically connected to the output end of the tenth field effect transistor M10 and the input end of the twelfth field effect transistor M12, the input end of the ninth field effect transistor M9 and the input end of the tenth field effect transistor M10 are electrically connected to the positive electrode of the power battery, and the output end of the eleventh field effect transistor M11 and the output end of the twelfth field effect transistor M12 are electrically connected to the negative electrode of the power battery; The controlled ends of the fifth field effect transistor M5, the sixth field effect transistor M6, the seventh field effect transistor M7, the eighth field effect transistor M8, the ninth field effect transistor M9, the tenth field effect transistor M10, the eleventh field effect transistor M11 and the twelfth field effect transistor M12 are electrically connected to the control module.

9. The multi-mode energy storage charging pile according to claim 7, characterized in that: The second DC-DC circuit further includes an input capacitor Cin and an output capacitor Cout. The input capacitor Cin is connected in parallel with the output voltage of the first DC-DC circuit, and the output capacitor Cout is connected in parallel with the power battery.

10. The multi-mode energy storage charging pile according to claim 7, characterized in that: The transformer further includes a series inductor Ls, and the series inductor Ls is connected in series with the fourth inductor L4.

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