Charging devices, charging piles and charging storage systems

Abstract

The present application discloses a charging device, a charging pile, and a charging and storage system. The charging device includes: an energy storage module, the energy storage module includes at least one energy storage unit, each energy storage unit has a first positive power supply terminal and a first negative power supply terminal, at least one energy storage unit is connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module through the first positive power supply terminal and the first negative power supply terminal, and the energy storage module is used to provide a first direct current; a charging module, the charging module is connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module, and the charging module is used to output charging based on the first direct current, the maximum charging output power of the charging module is greater than or equal to 350 kilowatts, and / or, the rated charging output power of the charging module is greater than or equal to 290 kilowatts; each energy storage unit includes a battery subunit. In this way, by configuring the energy storage unit inside the charging device, not only high-power charging, such as supercharging / fast charging, can be achieved, but also the cost is low.

Description

Technical Field

[0001] The present application relates to the field of charging technology, and in particular to a charging device, a charging pile, and a charging storage system. Background Art

[0002] At present, fast charging / super charging piles are less used, but with the popularization of fast charging / super charging electric vehicles, a large number of fast charging / super charging piles are urgently needed.

[0003] However, the fast charging / super charging piles in the related technologies all require additional configuration of transformers or transformer expansion, which is not conducive to the rapid access of fast charging / super charging piles and will increase more costs. Summary of the Invention

[0004] In view of the above problems, the present application provides a charging device, a charging pile and a charging and storage system. Without the need for additional transformer configuration or transformer expansion, by configuring an energy storage unit inside the charging device, not only can the charging device be quickly charged, such as fast charging / super charging, but the cost caused by adding a new transformer or expanding the transformer capacity can also be reduced.

[0005] In a first aspect, the present application provides a charging device, comprising: an energy storage module, the energy storage module comprising at least one energy storage unit, each energy storage unit having a first positive power supply terminal and a first negative power supply terminal, at least one energy storage unit being connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module through the first positive power supply terminal and the first negative power supply terminal, and the energy storage module being used to provide a first direct current; a charging module, the charging module being connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module, and the charging module being used to output charging based on the first direct current, the maximum charging output power of the charging module being greater than or equal to 350 kilowatts, and / or the rated charging output power of the charging module being greater than or equal to 290 kilowatts; wherein each energy storage unit comprises a battery subunit, and the ratio between the rated energy of the battery subunit and the rated charging output power of the charging module is greater than or equal to 1 / (n2*n3), wherein the value range of n2 is 94%~99%, and the value range of n3 is 4~6.

[0006] In the technical solution of the embodiment of the present application, without the need for additional transformer configuration or transformer expansion, by configuring an energy storage unit inside the charging device, not only can fast charging of the charging device, such as fast charging / super charging, be achieved, but also the cost caused by adding a new transformer or expanding the transformer capacity can be reduced; and appropriate n2 values and n3 values can also be selected according to different application scenarios and needs, thereby improving cost performance.

[0007] In some embodiments, the charging device further comprises an input module configured to provide charging energy to each energy storage unit. In this way, the input module can charge the energy storage unit.

[0008] In some embodiments, the maximum output power of the input module is less than or equal to 150 kilowatts, and / or the rated output power of the input module is less than or equal to 125 kilowatts. In this way, the charging device can achieve high-power charging even with low power input.

[0009] In some embodiments, the ratio of the maximum charging output power of the charging module to the maximum output power of the input module is greater than 1 and less than or equal to 15, and / or the ratio of the rated charging output power of the charging module to the rated output power of the input module is greater than 1 and less than or equal to 15. In this way, the charging device can achieve high-power charging even with low power input.

[0010] In some embodiments, each energy storage unit includes a battery subunit, and the ratio between the rated output power of the input module and the rated energy of the battery subunit is greater than or equal to 1 / n1, where n1 ranges from 1 to 4. Thus, an appropriate n1 value can be selected based on different application scenarios and requirements, thereby improving cost-effectiveness.

[0011] In some embodiments, each energy storage unit includes a battery subunit, and the ratio between the rated energy of the battery subunit and the rated power of the battery subunit is less than or equal to 1 / 3, and / or the volumetric energy density of the battery subunit is greater than or equal to 380 watt-hours / liter. In this way, the ratio between the rated energy of the battery subunit and the rated power of the battery subunit or the volumetric energy density of the battery subunit can be adjusted according to different application scenarios and requirements, thereby improving cost-effectiveness.

[0012] In some embodiments, at least one energy storage unit is connected in series and / or in parallel between a second positive power supply terminal and a second negative power supply terminal of an energy storage module via a first positive power supply terminal and a first negative power supply terminal to provide a first direct current. This allows the energy storage unit to be freely connected to the energy storage module in series and / or parallel.

[0013] In some embodiments, each energy storage unit includes a battery subunit, and each energy storage unit is configured to provide the second direct current based on power from the battery subunit.

[0014] In some embodiments, at least one includes multiple energy storage units, and some of the multiple energy storage units also include a first power conversion subunit, which is connected to the first positive power supply terminal and the first negative power supply terminal of the corresponding battery subunit and energy storage unit, respectively, and is used to convert the electrical energy of the battery subunit into a second direct current. Wherein, if the energy storage unit does not include the first power conversion subunit, the battery subunit is connected to the first positive power supply terminal and the first negative power supply terminal of the corresponding energy storage unit to provide the second direct current. In this way, by providing two charging modes based on whether the energy storage unit includes the first power conversion subunit, charging flexibility can be improved.

[0015] In some embodiments, some of the multiple energy storage units further include a first switch subunit, which is connected to the first positive power supply terminal and the first negative power supply terminal of the corresponding battery subunit and the energy storage unit, respectively, and is configured to connect the corresponding battery subunit to the first positive power supply terminal and the first negative power supply terminal of the energy storage unit when conductive, to provide a second direct current. Where the energy storage unit does not include the first switch subunit, the battery subunit is connected to the first positive power supply terminal and the first negative power supply terminal of the corresponding energy storage unit to provide the second direct current. In this way, by providing two charging modes depending on whether the energy storage unit includes the first switch subunit, the energy storage unit can be protected.

[0016] In some embodiments, some of the multiple energy storage units further include a first power conversion subunit and a first switch subunit, wherein the first power conversion subunit and the first switch subunit are connected in series between the first positive power supply terminal and the first negative power supply terminal of the corresponding battery subunit and the energy storage unit, and the first power conversion subunit is configured to convert the electrical energy of the battery subunit into a second direct current when the corresponding first switch subunit is turned on. Wherein, if the energy storage unit does not include the first power conversion subunit and the first switch subunit, the battery subunit is connected to the first positive power supply terminal and the first negative power supply terminal of the corresponding energy storage unit to provide the second direct current. In this way, by providing two charging modes depending on whether the energy storage unit includes the first power conversion subunit and the first switch subunit, charging flexibility can be improved and the energy storage unit can be protected.

[0017] In some embodiments, the first power conversion subunit is a bidirectional DC / DC subunit, so that the battery subunit can be charged and discharged through the bidirectional DC / DC subunit.

[0018] In some embodiments, the input module includes an input interface connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module, and configured to provide charging energy to each energy storage unit based on the third DC power provided by the first external power supply. Alternatively, the input module includes a second power conversion subunit connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module, and configured to provide charging energy to each energy storage unit based on the first AC power provided by the second external power supply. In this manner, the external power supply provides DC power to the energy storage unit via the input interface, or the external power supply provides AC power to the energy storage unit via the power conversion subunit, thereby achieving DC charging or AC charging of the energy storage unit.

[0019] In some embodiments, the second power conversion subunit is a bidirectional ACDC subunit, so that bidirectional energy flow can be achieved through the bidirectional ACDC subunit.

[0020] In some embodiments, the charging module includes a third power conversion subunit and a charging gun. The positive input and negative input terminals of the third power conversion subunit are correspondingly connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module. The positive output and negative output terminals of the third power conversion subunit are correspondingly connected to the positive input and negative input terminals of the charging gun. The third power conversion subunit is configured to convert the first DC power into a fourth DC power for charging output via the charging gun. In this manner, the charging guns do not share a common negative load.

[0021] In some embodiments, the third power conversion subunit is a bipolar bidirectional DC / DC subunit, so that bidirectional energy flow can be achieved through the bipolar bidirectional DC / DC subunit.

[0022] In some embodiments, the charging module includes a fourth power conversion subunit and a charging gun. The positive input terminal of the fourth power conversion subunit is connected to the second positive power supply terminal of the energy storage module, the positive output terminal of the fourth power conversion subunit is connected to the positive input terminal of the charging gun, and the negative input terminal of the charging gun is connected to the second negative power supply terminal of the energy storage module. The fourth power conversion subunit is used to convert the first DC power into a fourth DC power for charging output through the charging gun. In this way, the charging guns share a common load, which can reduce costs.

[0023] In some embodiments, the fourth power conversion sub-unit is a unipolar bidirectional DC / DC sub-unit, so that bidirectional energy flow can be achieved through the unipolar bidirectional DC / DC sub-unit.

[0024] In some embodiments, the energy storage module further includes a selection unit connected to the plurality of energy storage units and configured to select at least one energy storage unit from the plurality of energy storage units and connect it to the second positive power supply terminal and the second negative power supply terminal of the energy storage module to provide the first direct current. Thus, by connecting the selection unit to at least one of the plurality of energy storage units, charging flexibility can be improved.

[0025] In some embodiments, the energy storage module includes one second positive power supply terminal and one second negative power supply terminal, the selection unit includes multiple second switch sub-units, each second switch sub-unit is connected to an energy storage unit, each second switch sub-unit is connected in series between the first positive power supply terminal of the corresponding energy storage unit and the second positive power supply terminal of the energy storage module, the first negative power supply terminal of at least one energy storage unit is respectively connected to the second negative power supply terminal of the energy storage module, and the second switch sub-unit is used to connect the first positive power supply terminal of the corresponding energy storage unit to the second positive power supply terminal of the energy storage module when it is turned on.

[0026] In some embodiments, the charging module includes a fifth power conversion subunit and a charging gun. The positive input and negative input of the fifth power conversion subunit are connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module, respectively. The positive output and negative output of the fifth power conversion subunit are connected to the positive input and negative input of the charging gun, respectively. The fifth power conversion subunit is configured to convert the first DC power into a fourth DC power for charging output via the charging gun. In this manner, the charging guns do not share a common negative load.

[0027] In some embodiments, the fifth power conversion subunit is a bipolar bidirectional DC / DC subunit, so that bidirectional energy flow can be achieved through the bipolar bidirectional DC / DC subunit.

[0028] In some embodiments, the charging module includes a sixth power conversion subunit and a charging gun. The positive input terminal of the sixth power conversion subunit is connected to the second positive power supply terminal of the energy storage module, the positive output terminal of the sixth power conversion subunit is connected to the positive input terminal of the charging gun, and the negative input terminal of the charging gun is connected to the second negative power supply terminal of the energy storage module. The sixth power conversion subunit is configured to convert the first DC power into a fourth DC power for charging output via the charging gun. In this way, the charging guns share a common load, which can reduce costs.

[0029] In some embodiments, the sixth power conversion sub-unit is a unipolar bidirectional DC / DC sub-unit, so that bidirectional energy flow can be achieved through the unipolar bidirectional DC / DC sub-unit.

[0030] In some embodiments, the energy storage module includes multiple second positive power supply terminals, the energy storage module includes one second negative power supply terminal, the selection unit includes multiple second switch sub-units, each second switch sub-unit is connected to an energy storage unit and a second positive power supply terminal, each second switch sub-unit is connected in series between the first positive power supply terminal and the corresponding second positive power supply terminal of the corresponding energy storage unit, the first negative power supply terminal of at least one energy storage unit is respectively connected to the second negative power supply terminal of the energy storage module, and the second switch sub-unit is used to connect the first positive power supply terminal of the corresponding energy storage unit to the corresponding second positive power supply terminal when it is turned on.

[0031] In some embodiments, the charging module includes multiple seventh power conversion subunits and a charging gun. The positive input and negative input of each seventh power conversion subunit are respectively connected to a second positive power supply terminal and a second negative power supply terminal. The positive output and negative output of each seventh power conversion subunit are respectively connected to the positive input and negative input of the charging gun. The multiple seventh power conversion subunits are used to convert the first direct current into a fourth direct current for charging output via the charging gun. In this way, the charging guns do not share a common negative load.

[0032] In some embodiments, the seventh power conversion sub-unit is a bipolar bidirectional DC / DC sub-unit, so that bidirectional energy flow can be achieved through the bipolar bidirectional DC / DC sub-unit.

[0033] In some embodiments, the charging module includes multiple eighth power conversion subunits and a charging gun. The positive input terminal of each eighth power conversion subunit is connected to the second positive power supply terminal of one of the energy storage modules, the positive output terminal of each eighth power conversion subunit is connected to the positive input terminal of the charging gun, and the negative input terminal of the charging gun is connected to the second negative power supply terminal of the energy storage module. The multiple eighth power conversion subunits are used to convert the first direct current into a fourth direct current for charging output via the charging gun. In this way, the charging guns share a common negative load, which can reduce costs.

[0034] In some embodiments, the eighth power conversion sub-unit is a unipolar bidirectional DC / DC sub-unit, so that bidirectional energy flow can be achieved through the unipolar bidirectional DC / DC sub-unit.

[0035] In some embodiments, the input module includes a ninth power conversion subunit connected to at least one energy storage unit and configured to provide charging energy to each energy storage unit based on the first AC power provided by the second external power source. Thus, charging of the energy storage unit is achieved through a single power conversion subunit.

[0036] In some embodiments, the second external power source is a three-phase AC power source, and the ninth power conversion subunit is a bidirectional three-phase ACDC subunit. In this way, three-phase power access can be achieved through three energy storage units and one power conversion subunit.

[0037] In some embodiments, the input module includes multiple tenth power conversion subunits, each of which is connected to an energy storage unit. The multiple tenth power conversion subunits are configured to provide charging energy to each energy storage unit based on the first AC power provided by the second external power source. In this manner, the energy storage unit is charged via the multiple power conversion subunits.

[0038] In some embodiments, the second external power source is a three-phase AC power source, and the tenth power conversion subunit includes three, each of which is a bidirectional single-phase ACDC subunit. In this way, three-phase power access can be achieved through three energy storage units and three power conversion subunits.

[0039] In some embodiments, the charging device further includes a wireless communication module, and at least part of the energy storage module, the input module, and the charging module are connected to the wireless communication module to exchange information with external devices through the wireless communication module.

[0040] In a second aspect, the present application provides a charging pile, comprising the aforementioned charging device.

[0041] In a third aspect, the present application provides a charging and storage system, including the aforementioned charging device.

[0042] In some embodiments, the charging device includes multiple charging devices, and the multiple charging devices share a DC bus or an AC bus.

[0043] In some embodiments, when multiple charging devices share a DC bus and the input modules of the charging devices include input interfaces, the charging and storage system further includes: a first transformer, the primary winding of the first transformer being connected to the AC grid and configured to convert a second AC power provided by the AC grid into a first AC power; a first AC-DC conversion module, the first AC-DC conversion module being connected to the secondary winding of the first transformer and the DC bus, respectively, and configured to convert the first AC power into a third DC power; wherein the second positive power supply terminal and the second negative power supply terminal of the energy storage modules in the multiple charging devices are both connected to the DC bus. In this way, multiple charging devices can share a single DC bus.

[0044] In some embodiments, where multiple charging devices share a DC bus and the input modules of the charging devices include a second power conversion subunit, the charging-storage system further includes: a first transformer, the primary winding of the first transformer being connected to the AC power grid; the second power conversion subunit being connected to the secondary winding of the first transformer and the DC bus, respectively; the first transformer being configured to convert the second AC power provided by the AC power grid into the first AC power; wherein the second positive power supply terminal and the second negative power supply terminal of the energy storage modules in the multiple charging devices are both connected to the DC bus. In this way, multiple charging devices can share a single DC bus.

[0045] In some embodiments, when multiple charging devices share a common AC bus and the input modules of the charging devices include a ninth power conversion subunit or multiple tenth power conversion subunits, the system further includes: a second transformer, wherein the primary winding of the second transformer is connected to the AC grid, and the secondary winding of the second transformer is connected to the AC bus, for converting the second AC power provided by the AC grid into the first AC power; wherein the ninth power conversion subunit or multiple tenth power conversion subunits of the input modules of the multiple charging devices are all connected to the AC bus. In this way, a common AC bus is achieved for the multiple charging devices.

[0046] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0048] Figure 1 This is a schematic structural diagram of a charging device in which energy storage units are connected in series according to an embodiment of the present application;

[0049] Figure 2 This is a schematic structural diagram of a charging device with an input module according to an embodiment of the present application;

[0050] Figure 3 This is a schematic structural diagram of a charging device with energy storage units connected in parallel according to one embodiment of the present application;

[0051] Figure 4 This is a schematic structural diagram of a charging device in which an energy storage unit includes a battery subunit according to an embodiment of the present application;

[0052] Figure 5 This is a schematic structural diagram of a charging device in which an energy storage unit according to an embodiment of the present application includes a battery subunit and a first power conversion subunit;

[0053] Figure 6 This is a schematic structural diagram of a charging device in which an energy storage unit according to an embodiment of the present application includes a battery subunit and a first switch subunit;

[0054] Figure 7 This is a schematic structural diagram of a charging device in which an energy storage unit according to an embodiment of the present application includes a battery subunit, a first power conversion subunit, and a first switch subunit;

[0055] Figure 8 This is a schematic structural diagram of a charging device in which an input module includes an input interface according to an embodiment of the present application;

[0056] Figure 9 This is a schematic structural diagram of a charging device in which an input module according to an embodiment of the present application includes a second power conversion sub-unit;

[0057] Figure 10 This is a schematic structural diagram of a charging device in which charging guns do not share a common load according to an embodiment of the present application;

[0058] Figure 11 This is a schematic diagram of the structure of a charging device for charging guns sharing a common load according to one embodiment of the present application;

[0059] Figure 12 This is a schematic structural diagram of a charging device with a selection unit according to an embodiment of the present application;

[0060] Figure 13 for Figure 12 A schematic structural diagram of a charging device having a second positive power supply terminal is shown;

[0061] Figure 14 for Figure 13 A schematic diagram of the structure of a charging device having a second positive power supply terminal and charging guns not sharing a negative power supply;

[0062] Figure 15 for Figure 13 A schematic diagram of the structure of a charging device having a second positive power supply terminal and a common negative charge for charging guns is shown;

[0063] Figure 16 for Figure 12 A schematic structural diagram of a charging device having multiple second positive power supply terminals is shown;

[0064] Figure 17 for Figure 16 A schematic structural diagram of a charging device having multiple second positive power supply terminals and charging guns that do not share a common negative power supply;

[0065] Figure 18 for Figure 16 A schematic diagram of the structure of a charging device having multiple second positive power supply terminals and a common negative charge for charging guns is shown;

[0066] Figure 19 for Figure 12 A schematic structural diagram of a charging device having a selection unit and an input module including a ninth power conversion sub-unit is shown;

[0067] Figure 20 for Figure 12A schematic structural diagram of a charging device having a selection unit and an input module including a plurality of tenth power conversion subunits;

[0068] Figure 21 This is a schematic structural diagram of a charging device with a wireless communication module according to an embodiment of the present application;

[0069] Figure 22 This is a schematic diagram of the structure of a charging device in which energy storage units are connected in series, each energy storage unit includes a bidirectional DCDC sub-unit, and the charging guns do not share the same load;

[0070] Figure 23 This is a schematic diagram of the structure of a charging device in which energy storage units are connected in series, each energy storage unit includes a bidirectional DCDC sub-unit and a charging gun sharing the load;

[0071] Figure 24 This is a schematic diagram of the structure of a charging device in which energy storage units are connected in parallel, each energy storage unit includes a bidirectional DCDC sub-unit, and the charging guns do not share the same load;

[0072] Figure 25 This is a schematic diagram of the structure of a charging device in which energy storage units are connected in parallel, and each energy storage unit includes a bidirectional DCDC sub-unit and a charging gun sharing the load;

[0073] Figure 26 This is a schematic diagram of the structure of a charging device in which energy storage units are connected in series, some energy storage units include bidirectional DCDC sub-units, and charging guns do not share the same load;

[0074] Figure 27 This is a schematic diagram of the structure of a charging device in which energy storage units are connected in series and some energy storage units include bidirectional DCDC sub-units and charging guns share the same load;

[0075] Figure 28 This is a schematic structural diagram of a charging device in which energy storage units are connected in parallel, each energy storage unit includes a first switch sub-unit, and charging guns do not share the same load;

[0076] Figure 29 This is a schematic diagram of the structure of a charging device in which an energy storage unit and a bidirectional ACDC subunit form a three-phase power supply and the charging guns do not share the same load according to an embodiment of the present application;

[0077] Figure 30 This is a schematic diagram of the structure of a charging device in which an energy storage unit and a bidirectional ACDC subunit form a three-phase power supply and the charging guns share the same load according to an embodiment of the present application;

[0078] Figure 31 This is a schematic diagram of the structure of a charging pile according to an embodiment of the present application;

[0079] Figure 32 This is a schematic structural diagram of a charging and storage system according to an embodiment of the present application;

[0080] Figure 33 This is a structural diagram of a charging and storage system with a common DC bus for multiple charging devices according to one embodiment of the present application;

[0081] Figure 34 This is a structural diagram of a charging and storage system with a common DC bus for multiple charging devices according to another embodiment of the present application;

[0082] Figure 35 This is a structural diagram of a charging and storage system in which multiple charging devices share a common AC bus according to one embodiment of the present application. DETAILED DESCRIPTION

[0083] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0084] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0085] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0086] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0087] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0088] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0089] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0090] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0091] At present, fast charging / super charging piles are less used, but with the popularization of fast charging / super charging electric vehicles, a large number of fast charging / super charging piles are urgently needed.

[0092] However, the fast-charging / supercharging charging piles in the related art all require additional transformers or transformer expansion, which is not conducive to the rapid connection of the fast-charging / supercharging charging piles and increases costs. For example, the input end of the transformer is connected to the AC power grid, and the output end of the transformer is connected to the charging pile. When the charging pile is a fast-charging / supercharging charging pile, it is necessary to expand the transformer capacity or add a new transformer between the original transformer and the fast-charging / supercharging charging pile. However, since the transformer needs to be expanded or added, it is not conducive to the rapid connection of the fast-charging / supercharging charging pile and increases costs.

[0093] Based on this, the present application provides a charging device that, by configuring an energy storage unit inside the charging device without the need for additional transformer configuration or transformer expansion, can not only achieve fast charging of the charging device, such as fast charging / super charging, but also reduce the cost caused by adding a new transformer or expanding the transformer capacity.

[0094] The charging device disclosed in the embodiment of the present application can be used to charge electric vehicles, electric ships, electric tools and other equipment that require fast charging / supercharging, and can also be used to charge electric vehicles, electric ships, electric tools and other equipment that do not require fast charging / supercharging. In other words, the charging device disclosed in the embodiment of the present application can realize high-power and low-power charging of electrical equipment, and has a wide range of applications.

[0095] The charging device of the present application is described below with reference to specific embodiments.

[0096] Figure 1 Schematic diagram of the structure of a charging device 100 according to an embodiment of the present application.

[0097] Reference Figure 1 The charging device 100 may include: an energy storage module 110 and a charging module 120 .

[0098] Energy storage module 110 includes at least one energy storage unit, which can be n energy storage units 21 (n is a positive integer). Each energy storage unit 21 has a first positive power terminal (+) and a first negative power terminal (-). At least one energy storage unit is connected to a second positive power terminal (+) and a second negative power terminal (-) of energy storage module 110 via the first positive power terminal and the first negative power terminal. Energy storage module 110 is configured to provide a first direct current. As an example, the energy storage unit can be an electrical box, a battery module, a battery, etc., wherein the electrical box can be a battery pack.

[0099] The charging module 120 is connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110. The charging module 120 is used to output charging based on the first direct current. The maximum charging output power of the charging module 120 is greater than or equal to 350 kilowatts, and / or the rated charging output power of the charging module 120 is greater than or equal to 290 kilowatts.

[0100] Specifically, the number of energy storage units can be selected and set based on actual needs. When the charging device 100 is only used for low-power charging, the energy storage unit can be set to one or a small number of units, which can meet the low-power charging application scenario; when the charging device 100 is used for high-power charging, the energy storage unit can be set to multiple units, which can meet the high-power and low-power charging application scenarios. For example, adjusting the charging output power of the energy storage unit, the charging module, or the energy storage unit and the charging module can be used for high-power or low-power charging. Due to the modularity of the energy storage unit, the energy storage unit can be freely increased or decreased, and rapid access can be achieved to achieve high-power charging without adding a transformer or expanding the transformer capacity.

[0101] When there is only one energy storage unit 21, the first positive power supply terminal of the energy storage unit 21 is connected to the second positive power supply terminal of the energy storage module 110, the first negative power supply terminal of the energy storage unit 21 is connected to the second negative power supply terminal of the energy storage module 110, and the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110 are also connected to the charging module 120. During charging, the energy storage module 110 provides a first direct current through the energy storage unit 21, and the charging module 120 converts the first direct current to obtain the target direct current to charge the device to be charged. At this time, the charging device 100 can meet the low-power charging application scenario. It should be noted that the relevant parameters of the energy storage unit 21 and the charging module 120 can be set based on actual conditions, and the charging requirements can be met through reasonable parameter configuration.

[0102] When there are multiple energy storage units 21, the multiple energy storage units 21 can be connected in series, in parallel, or in series-parallel, and connected to the charging module 120 through the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110. Figure 1 In the embodiment, n energy storage units 21 are connected in series between the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110 through their respective first positive power supply terminal and first negative power supply terminal. At the same time, the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110 are also connected to the charging module 120. During charging, when high-power charging is required, the energy storage module 110 provides a first direct current through multiple energy storage units 21. The first direct current can have a high power. Then, the charging module 120 converts the first direct current to obtain a target direct current to charge the device to be charged. The target direct current has a high power, which can meet the high-power charging application scenario. When low-power charging is required, the first direct current can have a low power, and the target direct current has a low power, which can meet the low-power charging application scenario. It should be noted that the relevant parameters of the energy storage unit 21 and the charging module 120 can be set based on actual conditions. It is sufficient to meet the charging requirements through reasonable parameter configuration. When there are multiple energy storage units, the power of the energy storage module is the sum of the power of the multiple energy storage units.

[0103] Exemplarily, the maximum charging output power of the charging module 120 is greater than or equal to 350 kilowatts, that is, the maximum charging output power of the charging device 100 is greater than or equal to 350 kilowatts. For example, by selecting an appropriate number of energy storage units, the maximum charging output power of the charging module 120 can reach 350 kilowatts, 360 kilowatts, 500 kilowatts, 800 kilowatts, and 900 kilowatts, etc. It should be noted that the charging output power here refers to the maximum charging output power. During actual charging, it can be backward compatible. For example, when the maximum charging output power is 360 kilowatts, it means that the charging device 100 can output a charging output power of 0 to 360 kilowatts to meet different charging needs.

[0104] It is understandable that the maximum charging output power of the charging module 120 satisfies a certain multiple relationship with the rated charging output power, for example, a multiple relationship of 1.1 to 1.2. Therefore, the rated charging output power of the charging module 120 can be greater than or equal to 290 kilowatts, that is, the rated charging output power of the charging device 100 is greater than or equal to 290 kilowatts.

[0105] In practical applications, the maximum charging output power of the charging module 120 may be limited, the rated charging output power may be limited, or both may be limited at the same time.

[0106] In the above embodiment, modular energy storage units are configured inside the charging device, so that the energy storage units can be freely increased or decreased. When high-power charging is required, the free and rapid access of the energy storage units can not only achieve high-power charging, such as fast charging / supercharging, but also eliminate the need for additional transformers or transformer expansion, thereby reducing transformer costs.

[0107] In some embodiments, reference Figure 2 The charging device 100 further includes an input module 130 , which is used to provide charging energy to each energy storage unit 21 .

[0108] In some embodiments, the maximum output power of the input module 130 is less than or equal to 150 kilowatts, and / or the rated output power of the input module 130 is less than or equal to 125 kilowatts.

[0109] Specifically, the input module 130 is mainly used to charge the various energy storage units 21 in the energy storage module 110, and is low-power charging during charging. Exemplarily, the maximum output power of the input module 130 is less than or equal to 150 kilowatts, for example, the maximum output power is 150 kilowatts, 100 kilowatts, and 85 kilowatts, etc. It should be noted that the output power here refers to the maximum output power. During actual charging, it can be backward compatible. For example, when the maximum output power is 150 kilowatts, it means that an output power of 0 to 150 kilowatts can be used to charge the various energy storage units 21 in the energy storage module 110.

[0110] In this example, the input module 130 has a low power output, while the charging module 120 has a high power output. Therefore, the entire charging device 100 can achieve high power output with low power input. For example, the input end of the transformer is connected to the AC power grid, and the output end of the transformer is connected to the input module 130. When the transformer is a small-capacity transformer, the maximum output power of the input module 130 will also be limited by the capacity of the transformer. For example, the maximum output power is 150 kilowatts. At this time, the low power is used to charge the individual energy storage units in the energy storage module 110. However, when the energy storage module 110 discharges to charge the device to be charged, high power charging can be achieved based on multiple energy storage units. For example, the maximum charging output power of the charging module 120 is 360 kilowatts. In this way, high power output is achieved with low power input, allowing the charging device to meet high-power charging needs without adding an additional transformer or expanding the transformer capacity. Those skilled in the art will understand that the power grid generally refers to a system that can provide electricity. As an example, the power grid can be a municipal power source.

[0111] It is understandable that the maximum output power of the input module 130 satisfies a certain multiple relationship with the rated output power, such as a multiple relationship of 1.1 to 1.2, so the rated output power of the input module 130 can be less than or equal to 125 kilowatts.

[0112] In practical applications, the maximum output power of the input module 130 may be limited, the rated output power may be limited, or both may be limited at the same time.

[0113] In the above embodiment, by configuring a modular energy storage unit inside the charging device, high power output can be achieved under low power input, so that the charging device can meet high-power charging needs without adding an additional transformer or expanding the transformer capacity.

[0114] In some embodiments, the ratio between the maximum charging output power of the charging module 120 and the maximum output power of the input module 130 is greater than 1 and less than or equal to 15, and / or the ratio between the rated charging output power of the charging module 120 and the rated output power of the input module 130 is greater than 1 and less than or equal to 15.

[0115] Specifically, the maximum charging output power of the charging module 120 is greater than the maximum output power of the input module 130, that is, the ratio of the maximum charging output power of the charging module 120 to the maximum output power of the input module 130 is greater than 1. For example, the ratio of the maximum charging output power of the charging module 120 to the maximum output power of the input module 130 can be greater than 2, greater than 2.3, greater than 3, greater than 4, greater than 8, or greater than 12.5, thereby achieving high power output with low power input. For example, when the ratio is 12.5, it means that the maximum charging output power of the charging module 120 is 12.5 times the maximum output power of the input module 130. Assuming that the maximum output power of the input module 130 is 40 kilowatts, the maximum charging output power of the charging module 120 is greater than or equal to 500 kilowatts.

[0116] At the same time, the ratio of the maximum charging output power of the charging module 120 to the maximum output power of the input module 130 is less than or equal to 15, for example, it can be 15, 12.5, 10.3, 9, 7 and 6, etc. For example, when the ratio is 6, it means that the maximum charging output power of the charging module 120 is 6 times the maximum output power of the input module 130. Assuming that the maximum output power of the input module 130 is 150 kilowatts, then the maximum charging output power of the charging module 120 is less than or equal to 900 kilowatts.

[0117] It should be noted that when setting the above-mentioned ratios, the minimum ratio is less than or equal to the maximum ratio. For example, the ratio between the maximum charging output power of the charging module 120 and the maximum output power of the input module 130 is greater than 2 and less than or equal to 15, or greater than 1 and less than or equal to 6, or greater than 6 and less than or equal to 12.5, and so on. The specific setting is selected according to actual needs.

[0118] In this way, by limiting the ratio between the maximum charging output power of the charging module 120 and the maximum output power of the input module 130, it is possible to achieve high cost performance and good performance while realizing low power input and high power output.

[0119] It can be understood that the maximum charging output power of the charging module 120 and the rated charging output power satisfy a certain multiple relationship, such as a multiple relationship of 1.1 to 1.2. At the same time, the maximum output power of the input module 130 and the rated output power satisfy a certain multiple relationship, such as a multiple relationship of 1.1 to 1.2. Therefore, the ratio between the rated charging output power of the charging module 120 and the rated output power of the input module 130 can also be greater than 1 and less than or equal to 15.

[0120] In actual applications, the ratio between the maximum charging output power of the charging module 120 and the maximum output power of the input module 130 can be limited, or the ratio between the rated charging output power of the charging module 120 and the rated output power of the input module 130 can be limited, or both can be limited at the same time.

[0121] In the above embodiments, by limiting the ratio of the maximum charging output power of the charging module to the maximum output power of the input module, and / or limiting the ratio of the rated charging output power of the charging module to the rated output power of the input module, it is possible to achieve high cost performance and good performance while realizing low power input and high power output.

[0122] In some embodiments, each energy storage unit 21 includes a battery subunit, and the ratio between the rated output power of the input module 130 and the rated energy of the battery subunit is greater than or equal to 1 / n1, where the value range of n1 is 1-4.

[0123] Specifically, the rated energy of a battery subunit refers to the energy capacity specified during its design. It represents the maximum energy the subunit can store or output under normal operating conditions, expressed in kilowatt-hours. The rated output power of input module 130 is ≥ the rated energy of the battery subunit / (n1)*100%, where n1 can be 1, 1.4, 2, 3, or 4, among other values. This setting improves the cost-effectiveness of the entire charging device.

[0124] In some embodiments, each energy storage unit 21 includes a battery subunit, and the ratio between the rated energy of the battery subunit and the rated charging output power of the charging module 120 is greater than or equal to 1 / (n2*n3), where the value range of n2 is 94%~99%, and the value range of n3 is 4~6.

[0125] That is to say, the rated energy of the battery subunit is ≥ the rated charging output power of the charging module 120 / (n2*n3)*100%, where n2 can be 94%, 96%, 98.5% and 99%, etc., and n3 can be 4, 5, 5.5 and 6, etc. Such a setting can improve the cost-effectiveness of the entire charging device.

[0126] In some embodiments, each energy storage unit includes a battery subunit, the ratio between the rated energy of the battery subunit and the rated power of the battery subunit is less than or equal to 1 / 3, and / or the volume energy density of the battery subunit is greater than 380 watt-hours / liter.

[0127] That is to say, the ratio of the rated energy to the rated power of the battery subunit is not greater than 1:3. For example, when the rated power of the battery subunit is 350 kilowatts, the rated energy of the battery subunit is 58 kilowatts. Such a setting can improve the cost-effectiveness of the entire charging device.

[0128] The volumetric energy density of the battery subunit is greater than or equal to 380 Wh / L, and can be, for example, 380 Wh / L, 400 Wh / L, 600 Wh / L, or 900 Wh / L. It will be appreciated that the higher the energy density of the battery subunit, the smaller its volume, thereby saving space and reducing construction costs while still providing high power output.

[0129] In some embodiments, each energy storage unit includes a battery subunit, and the maximum discharge rate of the battery subunit is greater than or equal to 4 times the rate, for example, the maximum discharge rate is greater than or equal to 5 times the rate, 6 times the rate, 7 times the rate, or 8 times the rate, etc. In this way, high power output can be provided.

[0130] It should be noted that the above parameters can be superimposed. For example, when the maximum charging output power of the charging module 120 is greater than or equal to 350 kilowatts, the maximum output power of the battery subunit is greater than or equal to 350 kilowatts, the rated power of the battery subunit is greater than or equal to 350 kilowatts, the rated energy of the battery subunit is greater than or equal to 58 kWh, the maximum discharge rate of the battery subunit is greater than or equal to 4 times, and the maximum output power of the input module 130 can be less than or equal to 150 kilowatts.

[0131] It should be noted that the aforementioned parameters related to battery subunits, in some cases, also apply to energy storage units and / or energy storage modules. That is, in some cases, the aforementioned parameters are applicable to energy storage units, energy storage modules, and battery subunits. For example, when an energy storage unit includes only battery subunits, the relevant parameters of the battery subunits are also the relevant parameters of the energy storage unit. Furthermore, when the energy storage module 110 includes only one energy storage unit, the relevant parameters of the battery subunits are also the relevant parameters of the energy storage module 110; and so on.

[0132] It should be noted that the energy storage unit may include one or more battery subunits, and multiple battery subunits may be connected in series, in parallel, or in series and parallel. Each battery subunit may be a single cell, or it may be formed by multiple single cells connected in series, in parallel, or in series and parallel. For example, the single cells may include 10 to 100, and 2 to 6 battery subunits may be obtained by combining the single cells, and the 2 to 6 battery subunits are connected in series and / or in parallel. The energy storage unit can reach a capacity of 80 kilowatts to 150 kilowatts through 2 to 6 battery subunits. For example, 80 kilowatts can be achieved by combining 2 single cells; for another example, 150 kilowatts can be achieved by combining 100 single cells; for another example, 90 kilowatts can be achieved by combining 80 single cells; and so on.

[0133] In the above embodiment, by limiting the proportional relationship between the rated energy and rated power of the battery subunit, the rated output power of the input module, and the rated charging output power of the charging module, the entire charging device can have a high cost-effectiveness.

[0134] In some embodiments, at least one energy storage unit is connected in series and / or in parallel between the second positive power terminal and the second negative power terminal of the energy storage module 110 via the first positive power terminal and the first negative power terminal to provide a first direct current.

[0135] Specifically, when there is one energy storage unit 21, the first positive power supply terminal of the energy storage unit 21 is connected to the second positive power supply terminal of the energy storage module 110, and the first negative power supply terminal of the energy storage unit 21 is connected to the second negative power supply terminal of the energy storage module 110, and the first direct current is provided through the energy storage unit.

[0136] When there are multiple energy storage units, the multiple energy storage units can be connected in series, in parallel, or in series and in parallel. Figure 1 , multiple energy storage units 21 are connected in series between the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110 through their own first positive power supply terminal and first negative power supply terminal; for example, referring to Figure 3 The multiple energy storage units 21 are connected in parallel between the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110 via their own first positive power supply terminal and first negative power supply terminal. For another example, the multiple energy storage units 21 can be connected in series first and then in parallel, or first in parallel and then in series between the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110. The first DC power is provided by connecting the multiple energy storage units 21 in series, in parallel, or in series and parallel. The specific connection method to be used can be selected based on actual conditions.

[0137] In the above embodiments, multiple energy storage units can be connected in series, in parallel, or in series-parallel, which allows for free access of energy storage units to meet different charging power requirements.

[0138] In some embodiments, reference Figures 4 to 7 Each energy storage unit 21 includes a battery subunit, and each energy storage unit 21 is used to provide a second direct current based on the electrical energy of the battery subunit.

[0139] For example, refer to Figure 4 The energy storage unit 21 includes a battery subunit BAT. Each energy storage unit 21 provides a second DC power based on the power of the battery subunit. After the multiple energy storage units 21 are connected in series and / or in parallel, they provide the first DC power to the charging module 120.

[0140] In some embodiments, reference Figure 5 , at least one includes multiple, some of the multiple energy storage units 21 also include a first power conversion subunit 31, the first power conversion subunit 31 is respectively connected to the first positive power supply terminal and the first negative power supply terminal of the corresponding battery subunit and the energy storage unit 21, and is used to convert the electric energy of the battery subunit into a second direct current; wherein, when the energy storage unit 21 does not include the first power conversion subunit 31, the battery subunit is connected to the first positive power supply terminal and the first negative power supply terminal of the corresponding energy storage unit 21 to provide the second direct current.

[0141] Specifically, when there is one energy storage unit, the energy storage unit further includes a first power conversion subunit to convert the electrical energy of the battery subunit into a second direct current.

[0142] When there are multiple energy storage units, a first power conversion subunit may be provided in each of the multiple energy storage units, or a first power conversion subunit may be provided in some of the multiple energy storage units. Figure 5 In the embodiment, the first energy storage unit 21 includes the first battery subunit BAT and the first first power conversion subunit 31. The first first power conversion subunit 31 is connected to the first positive power supply terminal and the first negative power supply terminal of the first battery subunit BAT and the first energy storage unit 21, respectively. The first first power conversion subunit 31 converts the electric energy of the first battery subunit BAT into a second direct current. The n-1th energy storage unit 21 includes the n-1th battery subunit BAT and the n-1th first power conversion subunit. Unit 31, the n-1th first power conversion subunit 31 is respectively connected to the first positive power supply terminal and the first negative power supply of the n-1th battery subunit BAT and the n-1th energy storage unit 21, and the electric energy of the n-1th battery subunit BAT is converted into a second direct current through the n-1th first power conversion subunit 31; the nth energy storage unit 21 includes the nth battery subunit BAT, and the nth battery subunit BAT is connected to the first positive power supply terminal and the first negative power supply of the nth energy storage unit 21 to provide the second direct current.

[0143] In some embodiments, when the battery subunit is discharging, the maximum output power of the first power conversion subunit is greater than or equal to 350 kilowatts, and / or the rated output power is greater than or equal to 310 kilowatts. When the battery subunit is charging, the ratio of the maximum output power of the input module 130 to the maximum output power of the first power conversion subunit is no greater than 1:4, and / or the ratio of the rated output power of the input module 130 to the rated output power of the first power conversion subunit is no greater than 1:4.

[0144] In the above embodiment, some or all of the multiple energy storage units can be provided with a first power conversion sub-unit, and the electric energy of the battery sub-unit is converted by the first power conversion sub-unit to provide a second direct current. This can improve the flexibility of charging. At the same time, by partially setting up the first power conversion sub-unit, the cost can be reduced while meeting the charging needs. Moreover, this method can realize the access with and without the first power conversion sub-unit, and has high applicability.

[0145] In some embodiments, reference Figure 6 Some of the multiple energy storage units 21 further include a first switch subunit 41, which is respectively connected to the first positive power supply terminal and the first negative power supply terminal of the corresponding battery subunit and the energy storage unit 21, and is used to connect the corresponding battery subunit to the first positive power supply terminal and the first negative power supply terminal of the energy storage unit 21 when it is turned on to provide a second direct current; wherein, when the energy storage unit does not include the first switch subunit, the battery subunit is connected to the first positive power supply terminal and the first negative power supply terminal of the corresponding energy storage unit to provide the second direct current.

[0146] Specifically, when there is only one energy storage unit, the energy storage unit also includes a first switch subunit. When the first switch subunit is turned on, the battery subunit is connected to the first positive power supply terminal and the first negative power supply terminal of the energy storage unit to provide a second direct current; in abnormal circumstances, such as abnormalities in the battery subunit or the charging module 120, the first switch subunit is disconnected to reduce the further occurrence of abnormal accidents; when the battery subunit does not need to work, such as when the energy storage unit does not need to work based on power requirements, the first switch subunit is disconnected to stop the battery subunit from providing the second direct current.

[0147] When there are multiple energy storage units, a first switch sub-unit may be provided in each of the multiple energy storage units, or a first switch sub-unit may be provided in some of the multiple energy storage units. Figure 6In the embodiment, the first energy storage unit 21 includes a first battery subunit BAT and a first first switch subunit 41. The first first switch subunit 41 is connected to the first positive power supply terminal and the first negative power supply terminal of the first battery subunit BAT and the first energy storage unit 21, respectively. The first first switch subunit 41 controls the on-off of the first battery subunit BAT and the first positive power supply terminal and the first negative power supply terminal of the first energy storage unit 21 to selectively provide a second direct current. ...; the n-1th energy storage unit 21 includes the n-1th battery subunit BAT and the n-1th first switch subunit 41. The n-1th first switch subunit 41 is connected to the first positive power supply terminal and the first negative power supply terminal of the n-1th battery subunit BAT and the n-1th energy storage unit 21, respectively. The n-1th first switch subunit 41 controls the on / off of the n-1th battery subunit BAT and the first positive power supply terminal and the first negative power supply terminal of the n-1th energy storage unit 21 to selectively provide a second direct current. The n-th energy storage unit 21 includes an n-th battery subunit BAT, and the n-th battery subunit BAT is connected to the first positive power supply terminal and the first negative power supply terminal of the n-1th energy storage unit 21 to provide the second direct current.

[0148] In the above embodiment, some or all of the multiple energy storage units can be provided with a first switch subunit, which selectively controls the battery subunit to provide the second DC power, thereby improving charging flexibility and protection in abnormal situations.

[0149] In some embodiments, reference Figure 7 , some of the multiple energy storage units 21 also include a first power conversion subunit 31 and a first switch subunit 41, the first power conversion subunit 31 and the first switch subunit 41 are connected in series between the corresponding battery subunit and the first positive power supply terminal and the first negative power supply terminal of the energy storage unit 21, and the first power conversion subunit 31 is used to convert the electric energy of the battery subunit into a second direct current when the corresponding first switch subunit 41 is turned on; wherein, when the energy storage unit does not include the first power conversion subunit and the first switch subunit, the battery subunit is connected to the first positive power supply terminal and the first negative power supply terminal of the corresponding energy storage unit to provide the second direct current.

[0150] Specifically, when there is one energy storage unit, the energy storage unit also includes a first power conversion subunit and a first switch subunit. When the first switch subunit is turned on, the first power conversion subunit converts the electrical energy of the battery subunit into a second direct current; in abnormal circumstances, such as abnormalities in the battery subunit or the charging module 120, the first switch subunit is disconnected and the first power conversion subunit stops working to reduce further occurrence of abnormal accidents; when the battery subunit does not need to work, such as when the energy storage unit does not need to work based on power requirements, the first switch subunit is disconnected and the first power conversion subunit stops working to stop the battery subunit from providing the second direct current.

[0151] When there are multiple energy storage units, a first switch subunit and a first power conversion subunit may be provided in each of the multiple energy storage units, or a first switch subunit and a first power conversion subunit may be provided in some of the multiple energy storage units. Figure 7 In the embodiment, the first energy storage unit 21 includes a first battery subunit BAT, a first first switch subunit 41 and a first first power conversion subunit 31. The first first switch subunit 41 and the first first power conversion subunit 31 are connected in series between the first battery subunit BAT and the first positive power supply terminal and the first negative power supply terminal of the first energy storage unit 21. When the first first switch unit 41 is turned on, the first first power conversion subunit 31 converts the electric energy of the first battery subunit BAT into a second direct current. The n-1th energy storage unit 21 includes an n-1th battery subunit BAT, an n-1th first switch subunit 41 and a The n-1 first power conversion subunits 31, the n-1 first switch subunit 41 and the n-1 first power conversion subunit 31 are connected in series between the n-1 battery subunit BAT and the first positive power supply terminal and the first negative power supply of the n-1 energy storage unit 21. When the n-1 first switch subunit 41 is turned on, the n-1 first power conversion subunit 31 converts the electric energy of the n-1 battery subunit BAT into a second direct current. The n-1 energy storage unit 21 includes the n-1 battery subunit BAT, and the n-1 battery subunit BAT is connected to the first positive power supply terminal and the first negative power supply of the n-1 energy storage unit 21 to provide a second direct current.

[0152] It should be noted that, in some embodiments, part of the energy storage unit may include the first switch sub-unit, and the other part may include the first power conversion sub-unit, which is not specifically limited here.

[0153] In the above embodiment, part or all of the multiple energy storage units may be provided with a first switch sub-unit and a first power conversion sub-unit, thereby improving charging flexibility and protection in abnormal situations.

[0154] In some embodiments, the first power conversion subunit is a bidirectional DC / DC subunit, which charges and discharges the battery subunit. The bidirectional direct current converter (DCDC) subunit includes, but is not limited to, a buck-boost circuit, etc., and is not specifically limited here.

[0155] In some embodiments, reference Figure 8 The input module 130 includes an input interface (X, Y), which is connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110, and is used to provide charging energy to each energy storage unit 21 based on the third direct current provided by the first external power supply 210.

[0156] Specifically, the first external power source 210 is configured to generate a third direct current (DC) and transmit the third DC power to the energy storage module 110 via the input interface to charge the energy storage units 21 in the energy storage module 110. Exemplarily, the first external power source 210 may include a first transformer and a first AC / DC conversion module. The primary winding of the first transformer is connected to an AC power grid to convert the second AC power provided by the AC power grid into the first AC power. The first AC / DC conversion module is connected to the secondary winding of the first transformer and the input interface, respectively, to convert the first AC power into the third DC power and transmit the third DC power to the energy storage module 110 via the input interface.

[0157] The first AC / DC conversion module can be a unidirectional alternating current direct current converter (ACDC) subunit or a bidirectional ACDC subunit. When the first AC / DC conversion module is a bidirectional ACDC subunit, it can not only charge the energy storage module 110 but also feed the electrical energy of the energy storage module 110 into the AC power grid. The specific circuit structure of the unidirectional or bidirectional ACDC subunit is not limited herein.

[0158] It should be noted that, in this example, the maximum output power and the rated output power of the input module 130 are also the maximum output power and the rated output power of the first external power source 210 .

[0159] In the above embodiment, when the external power supply provides direct current, the battery subunit can be charged through the input interface.

[0160] In some embodiments, reference Figure 9The input module 130 includes a second power conversion subunit 131, which is connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110, and is used to provide charging energy to each energy storage unit based on the first alternating current provided by the second external power supply 220.

[0161] Specifically, the second external power source 220 is used to generate a first alternating current (AC) and provide it to the second power conversion subunit 131 in the input module 130. The second power conversion subunit 131 is used to charge the various battery subunits in the energy storage module 110. Exemplarily, the second external power source 220 may include a first transformer, the primary winding of the first transformer being connected to the AC grid, the second power conversion subunit 131 being connected to the secondary winding of the first transformer and the energy storage module 110, respectively. The first transformer converts the second AC power provided by the AC grid into a first AC power, which is provided to the second power conversion subunit 131. The second power conversion subunit 131 converts the first AC power into a third DC power to charge the energy storage module 110.

[0162] The second power conversion subunit 131 can be a unidirectional ACDC subunit or a bidirectional ACDC subunit. When the second power conversion subunit 131 is a bidirectional ACDC subunit, it can not only charge the energy storage module 110 but also feed the power of the energy storage module 110 to the AC power grid. The specific circuit structure of the unidirectional ACDC subunit or the bidirectional ACDC subunit is not limited here.

[0163] It should be noted that, in this example, the maximum output power and rated output power of the input module 130 are also the maximum output power and rated output power of the second power conversion sub-unit 131 .

[0164] In the above embodiment, when the external power source provides alternating current, the battery subunit can be charged through the second power conversion subunit.

[0165] In some embodiments, reference Figure 10 The charging module 120 includes a third power conversion subunit 121 and a charging gun 122. The positive input terminal and the negative input terminal of the third power conversion subunit 121 are correspondingly connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110. The positive output terminal and the negative output terminal of the third power conversion subunit 121 are correspondingly connected to the positive input terminal and the negative input terminal of the charging gun 122. The third power conversion subunit 121 is used to convert the first direct current into a fourth direct current for charging output through the charging gun 122.

[0166] Specifically, when charging the device to be charged, one or more energy storage units 21 provide a second direct current, so that the energy storage module 110 provides a first direct current, and the first direct current is converted into a fourth direct current by the third power conversion sub-unit 121 and provided to the charging gun 122, which is provided by the charging gun 122 to the device to be charged to charge the device to be charged.

[0167] In this example, the third power conversion subunit 121 is bipolar, that is, it has a positive input terminal and a negative input terminal. In this case, the positive input terminal and the negative input terminal of the third power conversion subunit 121 are connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110. The positive output terminal and the negative output terminal of the third power conversion subunit 121 are connected to the positive input terminal and the negative input terminal of the charging gun 122. The negative input terminal of the charging gun 122 and the second negative power supply terminal of the energy storage module 110 are not shared. This is suitable for application scenarios where the third power conversion subunit 121 has a bipolarity.

[0168] The third power conversion subunit 121 can be a bipolar unidirectional DCDC subunit or a bipolar bidirectional DCDC subunit. When the third power conversion subunit 121 is a bipolar bidirectional DCDC subunit, it can not only charge the device to be charged, but also feed the power of the device to be charged to the energy storage module 110, and can also feed the power to the AC power grid in the above example through the input module, ultimately realizing the free conversion of power between grid charging and storage.

[0169] In some embodiments, reference Figure 11 The charging module 120 includes a fourth power conversion subunit 123 and a charging gun 122. The positive input terminal of the fourth power conversion subunit 123 is connected to the second positive power supply terminal of the energy storage module 110, the positive output terminal of the fourth power conversion subunit 123 is connected to the positive input terminal of the charging gun 122, and the negative input terminal of the charging gun 122 is connected to the second negative power supply terminal of the energy storage module 110. The fourth power conversion subunit 123 is used to convert the first direct current into a fourth direct current for charging output through the charging gun 122.

[0170] Specifically, when charging the device to be charged, at least one energy storage unit 21 provides a second direct current, so that the energy storage module 110 provides a first direct current, and the first direct current is converted into a fourth direct current by the fourth power conversion sub-unit 123 and provided to the charging gun 122, which is provided by the charging gun 122 to the device to be charged to charge the device to be charged.

[0171] In this example, the fourth power conversion subunit 123 is unipolar, that is, it has only a positive input terminal. At this time, the positive input terminal of the fourth power conversion subunit 123 is connected to the second positive power supply terminal of the energy storage module 110, the positive output terminal of the fourth power conversion subunit 123 is connected to the positive input terminal of the charging gun 122, and the negative input terminal of the charging gun 122 is connected to the second negative power supply terminal of the energy storage module 110. That is, the negative input terminal of the charging gun 122 and the second negative power supply terminal of the energy storage module 110 are shared. In this way, it is suitable for application scenarios where the fourth power conversion subunit 123 has a unipolarity and has low cost.

[0172] The fourth power conversion subunit 123 can be a unipolar unidirectional DCDC subunit or a unipolar bidirectional DCDC subunit. When the fourth power conversion subunit 123 is a unipolar bidirectional DCDC subunit, it can not only charge the device to be charged, but also feed the power of the device to be charged to the energy storage module 110, and can also feed the power to the AC power grid of the aforementioned example through the input module, ultimately realizing the free conversion of power between grid charging and storage.

[0173] In the above embodiment, by sharing or not sharing the negative input terminal of the charging gun, it can be applied to different power supply scenarios, thereby increasing the range of choices when selecting the circuit structure.

[0174] In some embodiments, reference Figure 12 The energy storage module 110 also includes a selection unit 111, which is connected to the multiple energy storage units 21 and is used to select at least one energy storage unit 21 from the multiple energy storage units 21 and connect it to the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110 to provide a first direct current.

[0175] Specifically, during charging, the selection unit 111 may select one energy storage unit 21 and connect it to the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110 to provide the first direct current; or select all energy storage units 21 and connect them to the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110 to provide the first direct current. The charging module 120 then performs charging output based on the first direct current.

[0176] In the above embodiment, by selectively controlling the output of the energy storage unit through the selection unit, the flexibility of charging can be improved to meet different charging requirements.

[0177] In some embodiments, reference Figure 13The second positive power supply terminal and the second negative power supply terminal of the energy storage module 110 each include one, the selection unit 111 includes multiple second switch sub-units, each second switch sub-unit is connected to an energy storage unit 21, each second switch sub-unit is connected in series between the first positive power supply terminal of the corresponding energy storage unit 21 and the second positive power supply terminal of the energy storage module 110, the first negative power supply terminal of at least one energy storage unit 21 is respectively connected to the second negative power supply terminal of the energy storage module 110, and the second switch sub-unit is used to connect the first positive power supply terminal of the corresponding energy storage unit to the second positive power supply terminal of the energy storage module 110 when it is turned on.

[0178] Specifically, the selection unit 111 includes n second switch subunits K, wherein the first second switch subunit K is connected in series between the first positive power supply terminal of the first energy storage unit 21 and the second positive power supply terminal of the energy storage module 110, ..., the n-1th second switch subunit K is connected in series between the first positive power supply terminal of the n-1th energy storage unit 21 and the second positive power supply terminal of the energy storage module 110, and the nth second switch subunit K is connected in series between the first positive power supply terminal of the nth energy storage unit 21 and the second positive power supply terminal of the energy storage module 110. By controlling the on-off of the second switch subunits, the corresponding energy storage unit is selected to provide the second DC power, thereby causing the energy storage module 110 to provide the first DC power. At this time, the charging module 120 converts the first DC power into a fourth DC power to charge the device to be charged.

[0179] In the above embodiment, by providing a second positive power supply terminal and selectively controlling the energy storage unit to provide the second direct current through the selection unit, the charging flexibility can be improved to meet the charging demand.

[0180] In some embodiments, reference Figure 14 The charging module 120 includes a fifth power conversion subunit 124 and a charging gun 122. The positive input terminal and the negative input terminal of the fifth power conversion subunit 124 are correspondingly connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110. The positive output terminal and the negative output terminal of the fifth power conversion subunit 124 are correspondingly connected to the positive input terminal and the negative input terminal of the charging gun 122. The fifth power conversion subunit 124 is used to convert the first direct current into a fourth direct current for charging output through the charging gun 122.

[0181] It should be noted that regarding the connection relationship between the fifth power conversion subunit 124 and the charging gun 122 and the energy storage module 110, as well as the structure of the fifth power conversion subunit 124, please refer to the aforementioned description of the third power conversion subunit 121, and the details will not be repeated here.

[0182] In some embodiments, reference Figure 15The charging module 120 includes a sixth power conversion subunit 125 and a charging gun 122. The positive input terminal of the sixth power conversion subunit 125 is connected to the second positive power supply terminal of the energy storage module 110, the positive output terminal of the sixth power conversion subunit 125 is connected to the positive input terminal of the charging gun 122, and the negative input terminal of the charging gun 122 is connected to the second negative power supply terminal of the energy storage module 110. The sixth power conversion subunit 125 is used to convert the first direct current into a fourth direct current for charging output through the charging gun 122.

[0183] It should be noted that regarding the connection relationship between the sixth power conversion subunit 125 and the charging gun 122 and the energy storage module 110, as well as the structure of the sixth power conversion subunit 125, please refer to the aforementioned description of the fourth power conversion subunit 123, and the details will not be repeated here.

[0184] In some embodiments, reference Figure 16 The energy storage module 110 includes multiple second positive power supply terminals, the energy storage module 110 includes one second negative power supply terminal, the selection unit 111 includes multiple second switch sub-units, each second switch sub-unit is connected to an energy storage unit 21 and a second positive power supply terminal, each second switch sub-unit is connected in series between the first positive power supply terminal and the corresponding second positive power supply terminal of the corresponding energy storage unit 21, the first negative power supply terminal of at least one energy storage unit 21 is respectively connected to the second negative power supply terminal of the energy storage module 110, and the second switch sub-unit is used to connect the first positive power supply terminal of the corresponding energy storage unit 21 to the corresponding second positive power supply terminal when it is turned on.

[0185] Specifically, the selection unit 111 includes n second switch subunits K, wherein the first second switch subunit K is connected in series between the first positive power supply terminal of the first energy storage unit 21 and a second positive power supply terminal of the energy storage module 110, ..., the n-1th second switch subunit K is connected in series between the first positive power supply terminal of the n-1th energy storage unit 21 and another second positive power supply terminal of the energy storage module 110, and the nth second switch subunit K is connected in series between the first positive power supply terminal of the nth energy storage unit 21 and another second positive power supply terminal of the energy storage module 110. By controlling the on-off of the second switch subunits, the corresponding energy storage unit 21 is selected to provide the second direct current, thereby causing the energy storage module 110 to provide the first direct current. At this time, the charging module 120 converts the first direct current into a fourth direct current to charge the device to be charged. It should be noted that the first direct current here includes multiple second direct currents, and the charging module 120 can selectively convert one or more second direct currents into the fourth direct current.

[0186] In the above embodiment, by providing a plurality of second positive power supply terminals and selectively controlling the energy storage unit to provide the second direct current through the selection unit, the flexibility of charging can be improved to meet the charging demand.

[0187] In some embodiments, reference Figure 17 The charging module 120 includes multiple seventh power conversion sub-units 51 and a charging gun 122. The positive input terminal and the negative input terminal of each seventh power conversion sub-unit 51 are correspondingly connected to a second positive power supply terminal and a second negative power supply terminal, and the positive output terminal and the negative output terminal of each seventh power conversion sub-unit 51 are correspondingly connected to the positive input terminal and the negative input terminal of the charging gun 122. The multiple seventh power conversion sub-units 51 are used to convert the first direct current into the fourth direct current for charging output through the charging gun 122.

[0188] Specifically, the plurality of seventh power conversion subunits include n seventh power conversion subunits 51, wherein the positive input terminal of the first seventh power conversion subunit 51 is connected to a second positive power supply terminal, ..., the positive input terminal of the n-1th seventh power conversion subunit 51 is connected to another second positive power supply terminal, the positive input terminal of the nth seventh power conversion subunit 51 is connected to yet another second positive power supply terminal, and the negative input terminals of the first seventh power conversion subunit 51, ..., the n-1th seventh power conversion subunit 51, and the nth seventh power conversion subunit 51 are all connected to the second negative power supply terminal. The positive output terminal and negative output terminal of the first seventh power conversion subunit 51, ..., the n-1th seventh power conversion subunit 51, and the nth seventh power conversion subunit 51 are respectively connected to the positive input terminal and negative input terminal of the charging gun 122.

[0189] In this example, each seventh power conversion sub-unit 51 can convert the second direct current of the corresponding energy storage unit 21 into the fifth direct current, and finally the plurality of seventh power conversion sub-units 51 output the fourth direct current.

[0190] The seventh power conversion subunit can be a bipolar unidirectional DCDC subunit or a bipolar bidirectional DCDC subunit. When the seventh power conversion subunit is a bipolar bidirectional DCDC subunit, it can not only charge the device to be charged, but also feed the power of the device to be charged to the energy storage module 110, and can also feed the power to the AC power grid of the aforementioned example through the input module, ultimately realizing the free conversion of power between grid charging and storage.

[0191] In some embodiments, reference Figure 18The charging module 120 includes multiple eighth power conversion sub-units 61 and a charging gun 122. The positive input terminal of each eighth power conversion sub-unit 61 is connected to the second positive power supply terminal of an energy storage module 110, the positive output terminal of each eighth power conversion sub-unit 61 is connected to the positive input terminal of the charging gun 122, and the negative input terminal of the charging gun 122 is connected to the second negative power supply terminal of the energy storage module 110. The multiple eighth power conversion sub-units 61 are used to convert the first direct current into a fourth direct current for charging output through the charging gun 122.

[0192] Specifically, the multiple eighth power conversion subunits 61 include n eighth power conversion subunits 61, wherein the positive input terminal of the first eighth power conversion subunit 61 is connected to a second positive power supply terminal,..., the positive input terminal of the n-1th eighth power conversion subunit 61 is connected to another second positive power supply terminal, the positive input terminal of the nth eighth power conversion subunit 61 is connected to another second positive power supply terminal, the positive output terminals of the first eighth power conversion subunit 61,..., the n-1th eighth power conversion subunit 61 and the nth eighth power conversion subunit 61 are all connected to the positive input terminal of the charging gun 122, and the negative input terminal of the charging gun 122 is connected to the second negative power supply terminal of the energy storage module 110.

[0193] In this example, each eighth power conversion sub-unit 61 can convert the second direct current of the corresponding energy storage unit 21 into the fifth direct current, and finally the plurality of eighth power conversion sub-units 61 output the fourth direct current.

[0194] The eighth power conversion subunit can be a unipolar unidirectional DCDC subunit or a unipolar bidirectional DCDC subunit. When the eighth power conversion subunit is a unipolar bidirectional DCDC subunit, it can not only charge the device to be charged, but also feed the electric energy of the device to be charged to the energy storage module 110, and can also feed the electric energy to the AC power grid of the aforementioned example through the input module, ultimately realizing the free conversion of electric energy between grid charging and storage.

[0195] In the above embodiment, by sharing or not sharing the negative input terminal of the charging gun, it can be applied to different power supply scenarios, thereby increasing the range of choices when selecting the circuit structure.

[0196] In some embodiments, reference Figure 19 The input module 130 includes a ninth power conversion subunit 132 , which is connected to at least one energy storage unit 21 and is configured to provide charging energy to each energy storage unit 21 based on the first alternating current provided by the second external power source 220 .

[0197] Specifically, the second external power source 220 is used to generate a first alternating current (AC) and provide it to the ninth power conversion subunit 132 in the input module 130. The ninth power conversion subunit 132 is used to charge the battery subunits in the energy storage module 110. Exemplarily, the second external power source 220 may include a second transformer, wherein the primary winding of the second transformer is connected to the AC grid, and the secondary winding of the second transformer is connected to the ninth power conversion subunit 132. The second transformer converts the second AC power provided by the AC grid into a first AC power, which is provided to the ninth power conversion subunit 132. The ninth power conversion subunit 132 converts the first AC power into a third DC power to charge the energy storage module 110.

[0198] Exemplarily, the second external power source 220 is a three-phase AC power source, and the ninth power conversion subunit 132 is a unidirectional three-phase ACDC subunit or a bidirectional three-phase ACDC subunit. In this case, each phase of the three-phase ACDC subunit is connected to an energy storage unit 21 to charge the corresponding energy storage unit 21. When the ninth power conversion subunit 132 is a bidirectional three-phase ACDC subunit, it can not only charge the energy storage module 110, but also feed the electric energy of the energy storage module 110 to the AC power grid. In this way, in the three-phase AC power, a single phase is implemented by an energy storage unit, and the three energy storage units can realize the function of three-phase AC power, for example, three-phase industrial frequency AC power with a phase difference of 120°. The specific circuit structure of the unidirectional three-phase ACDC subunit or the bidirectional three-phase ACDC subunit is not limited here.

[0199] It should be noted that, in this example, the maximum output power and the rated output power of the input module 130 are also the maximum output power and the rated output power of the ninth power conversion sub-unit 132 .

[0200] In the above embodiment, when the external power source provides alternating current, the battery subunit can be charged through the ninth power conversion subunit.

[0201] In some embodiments, reference Figure 20 The input module 130 includes multiple tenth power conversion subunits 71, each tenth power conversion subunit 71 is connected to an energy storage unit 21, and the multiple tenth power conversion subunits 71 are used to provide charging energy for each energy storage unit 21 based on the first alternating current provided by the second external power supply 220.

[0202] Specifically, the plurality of tenth power conversion subunits 71 include n tenth power conversion subunits 71, wherein the first tenth power conversion subunit 71 is connected to the second external power source 220 and the first energy storage unit 21, respectively, ..., the n-1th tenth power conversion subunit 71 is connected to the second external power source 220 and the n-1th energy storage unit 21, respectively, and the nth tenth power conversion subunit 71 is connected to the second external power source 220 and the nth energy storage unit 21, respectively. Each tenth power conversion subunit 71 can charge the corresponding energy storage unit 21 based on the first AC power provided by the second external power source 220.

[0203] Exemplarily, the second external power source 220 is a three-phase AC power source, and the tenth power conversion subunit 71 includes three, each of which is a unidirectional single-phase ACDC subunit or a bidirectional single-phase ACDC subunit. In this case, each tenth power conversion subunit is connected to one phase of the three-phase AC power source to charge the corresponding energy storage unit. When the tenth power conversion subunit is a bidirectional single-phase ACDC subunit, it can not only charge the energy storage module 110, but also feed the electric energy of the energy storage module 110 to the AC power grid. When feeding, the three bidirectional single-phase ACDC subunits cooperate with each other to form a three-phase AC power feed to the three-phase AC power grid. In this way, in the three-phase AC power, a single phase is realized by an energy storage unit, and the three energy storage units can realize the function of three-phase AC power. The specific circuit structure of the unidirectional single-phase ACDC subunit or the bidirectional single-phase ACDC subunit is not limited here.

[0204] It should be noted that, in this example, the maximum output power and rated output power of the input module 130 are the sum of the maximum output power and rated output power of the plurality of tenth power conversion sub-units.

[0205] In the above embodiment, when the external power source provides alternating current, the battery sub-unit can be charged through the plurality of tenth power conversion sub-units.

[0206] In some embodiments, reference Figure 21 The charging device 100 also includes a wireless communication module 140 , and at least part of the energy storage module 110 , the input module 130 and the charging module 120 are connected to the wireless communication module 140 to exchange information with external devices through the wireless communication module 140 .

[0207] It should be noted that in the above embodiments, a variety of charging device architectures are provided. For example, multiple energy storage units 21 can be connected in series, in parallel, or in series and parallel; some or all of the multiple energy storage units 21 can be provided with a first power conversion subunit, a first switch subunit, or a first power conversion subunit and a first switch subunit; the charging module 120 can adopt a unipolar power conversion subunit or a bipolar power conversion subunit, and the negative input terminal of the corresponding charging pile can be shared or not shared; a single phase of three-phase AC power is realized by the energy storage unit 21, and three energy storage units 21 can realize the function of three-phase AC power; the input module 130 can be an AC input or a DC input; and so on.

[0208] In order to enable those skilled in the art to more clearly understand the present application, the present application is described below with reference to specific examples, but this is not intended to limit the present application.

[0209] Example 1, refer to Figure 22 The energy storage module 110 includes multiple energy storage units 21, each of which includes a battery subunit and a first power conversion subunit. The first power conversion subunit can be a bidirectional DC-DC subunit 11. The multiple energy storage units 21 are connected in series between the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110. The second positive power supply terminal and the second negative power supply terminal of the energy storage module 110 are connected to the DC bus 3. In other words, the multiple energy storage units 21 are connected in series to the DC bus 3. The charging module 120 includes a third power conversion subunit 121 and a charging plug 122. The third power conversion subunit 121 has a high-voltage positive input terminal and a high-voltage negative input terminal, as well as a high-voltage positive output terminal and a high-voltage negative output terminal. The third power conversion subunit 121 can be a bipolar bidirectional DC-DC subunit. The input module 130 includes a second power conversion subunit 131, which can be a bidirectional AC-DC subunit. The second external power supply 220 includes a first transformer 311 connected to the AC power grid 1.

[0210] When charging the energy storage module 110, the first transformer 311 converts the second AC power provided by the AC grid 1 into the first AC power, which is then converted into DC power by the bidirectional ACDC subunit and then charged to each battery subunit in the energy storage module 110 through the DC bus 3.

[0211] When charging the device to be charged, the energy storage unit provides a second DC power based on the power of the battery subunit, and the energy storage module 110 obtains a first DC power based on the second DC power. The first DC power is converted by the high-power bipolar bidirectional DCDC subunit to obtain a fourth DC power, and is charged to the device to be charged through the charging gun 122 to achieve high-power charging, thereby achieving fast charging / super charging of the device to be charged.

[0212] It can be understood that under the action of the bidirectional ACDC subunit and the bipolar bidirectional DCDC subunit, the electric energy of the device to be charged can also be fed to the energy storage module 110 or the AC power grid 1, thereby realizing free switching of electric energy between the device to be charged, the energy storage module 110 and the AC power grid 1.

[0213] Example 2, refer to Figure 23 , this example is compared to Figure 22 The example shown differs in that the fourth power conversion subunit 123 has only a high-voltage positive input and a high-voltage positive output. The high-voltage negative input of the charging gun 122 is connected to the second negative power supply terminal of the energy storage module 110. That is, the charging gun 122 and the energy storage module 110 share a common negative terminal. This fourth power conversion subunit 123 can be a unipolar, bidirectional DC-DC subunit. To avoid redundancy, the same details are not repeated here.

[0214] Example 3, refer to Figure 24 , this example is compared to Figure 22 The example shown is different in that: multiple energy storage units 21 are connected in parallel between the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110, that is, multiple energy storage units 21 are connected in parallel to the DC bus 3.

[0215] Example 4, refer to Figure 25 , this example is compared to Figure 24 The example shown is different in that the fourth power conversion subunit 123 only has a high-voltage positive input terminal and a high-voltage positive output terminal, and the high-voltage negative input terminal of the charging gun 122 is connected to the second negative power supply terminal of the energy storage module 110, that is, the negative pole of the charging gun 122 and the energy storage module 110 is shared. The fourth power conversion subunit 123 can be a unipolar bidirectional DCDC subunit.

[0216] Example 5, refer to Figure 26 , this example is compared to Figure 22 In the example shown, the difference is that some of the multiple energy storage units 21 include battery subunits, and another part of the energy storage units 21 include battery subunits and a first power conversion subunit. For example, the energy storage unit 21 includes a battery subunit, and the energy storage unit 21 includes a battery subunit and a bidirectional DCDC subunit 11.

[0217] Example 6, refer to Figure 27 , this example is compared to Figure 26 The example shown is different in that the fourth power conversion subunit 123 only has a high-voltage positive input terminal and a high-voltage positive output terminal, and the high-voltage negative input terminal of the charging gun 122 is connected to the second negative power supply terminal of the energy storage module 110, that is, the negative pole of the charging gun 122 and the energy storage module 110 is shared. The fourth power conversion subunit 123 can be a unipolar bidirectional DCDC subunit.

[0218] Example 7, refer to Figure 28 , this example is compared to Figure 24 The example shown is different in that each energy storage unit 21 includes a battery subunit and a first switch subunit 41 . The first switch subunit 41 may be a protection switch to protect the energy storage unit in abnormal situations.

[0219] In Examples 1 through 7 above, the energy storage module 110 and the charging module 120 are both connected to the DC bus 3, meaning that the charging device 100 utilizes a DC bus 3 design. When multiple energy storage modules 110 and charging modules 120 are provided, the multiple charging devices 100 share the DC bus 3. When the charging device 100 utilizes a DC bus 3 design, if the maximum charging output power of the charging device 100 is greater than or equal to 350 kilowatts, the maximum output power of the battery subunit is greater than or equal to 350 kilowatts, the rated power of the battery subunit is greater than or equal to 350 kilowatts, the rated energy of the battery subunit is greater than or equal to 58 kilowatts, the maximum discharge rate of the battery subunit is greater than or equal to 4C, the maximum output power of the first power conversion subunit is greater than or equal to 350 kilowatts, and the rated power of the first power conversion subunit is greater than or equal to 310 kilowatts. The maximum output power of the input module 130 is less than or equal to 150 kilowatts, and the ratio of the maximum output power of the input module 130 to the maximum output power of the first power conversion subunit is no greater than 1:4.

[0220] Example 8, refer to Figure 29 The energy storage module 110 includes three energy storage units 21 and a selection unit 111. Each energy storage unit 21 includes a battery subunit. The selection unit 111 includes three second switch subunits K, namely the first second switch subunit K, the second second switch subunit K, and the third second switch subunit K. The charging module 120 includes a fifth power conversion subunit 124 and a charging gun 122. The fifth power conversion subunit 124 has a high-voltage positive input terminal and a high-voltage negative input terminal, as well as a high-voltage positive output terminal and a high-voltage negative output terminal. The fifth power conversion subunit 124 can be a bipolar bidirectional DC-DC subunit. The input module 130 includes three tenth power conversion subunits, which can be bidirectional single-phase AC-DC subunits. The second external power supply 220 includes a second transformer 312 connected to the AC grid 1 and the AC bus 2.

[0221] When charging the energy storage module 110, the second transformer 312 converts the second AC power provided by the AC grid 1 into a first AC power, which is converted into DC power by the bidirectional single-phase ACDC sub-unit before charging the corresponding battery sub-unit. Each bidirectional single-phase ACDC sub-unit is connected to a single-phase AC bus 2. For example, the bidirectional single-phase ACDC sub-unit 1301 is connected to the A phase, the bidirectional single-phase ACDC sub-unit 1302 is connected to the B phase, and the bidirectional single-phase ACDC sub-unit 1303 is connected to the C phase. It should be noted that under the action of the bidirectional single-phase ACDC sub-unit, when the electric energy in the energy storage module 110 is fed to the AC grid 1, the three bidirectional single-phase ACDC sub-units can cooperate with each other to generate three-phase AC power with a phase difference of 120°, so that three-phase AC power can be achieved through the three energy storage units 21.

[0222] When charging the device to be charged, the energy storage unit provides a second DC power based on the electrical energy of the battery subunit. The energy storage module 110 selectively outputs the second DC power through the selection unit 111 to obtain the first DC power. The first DC power is converted by the high-power bipolar bidirectional DCDC subunit to obtain the fourth DC power, and the device to be charged is charged through the charging gun 122 to achieve high-power charging, thereby achieving fast charging / super charging of the device to be charged. In some examples, the first second switch subunit K, the second second switch subunit K, and the third second switch subunit K can be closed separately and sequentially in time to keep the power in the three energy storage units 21 consistent.

[0223] It can be understood that under the action of the bidirectional single-phase ACDC subunit and the bipolar bidirectional DCDC subunit, the electric energy of the device to be charged can also be fed to the energy storage module 110 or the AC power grid 1, thereby realizing free switching of electric energy between the device to be charged, the energy storage module 110 and the AC power grid 1.

[0224] Example 9, refer to Figure 30 , this example is compared to Figure 29 The example shown is different in that the sixth power conversion subunit 125 only has a high-voltage positive input terminal and a high-voltage positive output terminal, and the high-voltage negative input terminal of the charging gun 122 is connected to the second negative power supply terminal of the energy storage module 110, that is, the negative pole of the charging gun 122 and the energy storage module 110 is shared. The sixth power conversion subunit 125 can be a unipolar bidirectional DCDC subunit.

[0225] In Examples 8 and 9 above, the energy storage module 110 and the charging module 120 are both connected to the AC bus 2, meaning the charging device 100 is designed with the AC bus 2. When multiple energy storage modules 110 and charging modules 120 are provided, the multiple charging devices 100 share the AC bus 2.

[0226] In Examples 1 through 9 above, the charging device 100 can communicate with external devices, including but not limited to cloud service / monitoring platforms, via wireless communication module 140 to achieve 4G / 5G communication. The cloud service / monitoring platform selects appropriate peak / valley time periods based on the peak / valley time periods in the region where the charging device 100 is located, and transmits this information to the charging device 100, thereby enabling peak load shifting and valley filling. For example, during peak hours of the AC grid 1, the AC grid 1 does not charge the energy storage module 110. However, during off-peak hours, the AC grid 1 slowly charges the energy storage module 110.

[0227] It should be noted that the above examples 1 to 9 are merely exemplary descriptions. Based on the inventive concept of this application, through reasonable setting of the above-mentioned architecture, they should all be within the scope of protection of this application.

[0228] Based on the above embodiments, the charging device of the present application can not only realize fast charging of the charging device, such as fast charging / super charging, but also reduce the cost caused by adding a new transformer or expanding the transformer capacity by configuring an energy storage unit inside the charging device without the need for additional transformer configuration or transformer expansion.

[0229] The charging pile of the present application is described below with reference to specific embodiments.

[0230] Figure 31 Schematic diagram of the structure of a charging pile 200 according to an embodiment of the present application.

[0231] Reference Figure 31 The charging pile 200 includes the aforementioned charging device 100 .

[0232] It should be pointed out that the above explanations of the embodiments and beneficial effects of the charging device are also applicable to the charging piles of the embodiments of the present application. To avoid redundancy, they will not be elaborated here.

[0233] The charging and storage system of the present application is described below with reference to specific embodiments.

[0234] Figure 32 Schematic diagram of the structure of a charging and storage system 300 according to one embodiment of the present application.

[0235] Reference Figure 32 The charging and storage system 300 includes the aforementioned charging device 100.

[0236] In some embodiments, the charging device 100 includes multiple charging devices 100 , and the multiple charging devices 100 share a DC bus 3 or an AC bus 2 .

[0237] In some embodiments, when multiple charging devices 100 share a DC bus 3 and the input module 130 of the charging device 100 includes an input interface, the charging and storage system 300 also includes: a first transformer 311 and a first AC-DC conversion module 320, the primary winding of the first transformer 311 is connected to the AC power grid 1, and is used to convert the second AC power provided by the AC power grid 1 into the first AC power; the first AC-DC conversion module 320 is respectively connected to the secondary winding of the first transformer 311 and the DC bus 3, and is used to convert the first AC power into the third DC power; wherein, the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110 in the multiple charging devices 100 are both connected to the DC bus 3.

[0238] For example, refer to Figure 33 The charging and storage system 300 includes multiple charging devices 100, a first transformer 311, and a first AC / DC conversion module 320. The AC grid 1 is connected to the DC bus 3 via the first transformer 311 and the first AC / DC conversion module 320. The energy storage modules 110 and charging modules 120 of the multiple charging devices 100 are all connected to the DC bus 3, allowing the multiple charging devices 100 to share the DC bus 3. The first AC / DC conversion module 320 can be a unidirectional A / D converter subunit or a bidirectional A / D converter subunit.

[0239] It should be noted that Figure 33 For instructions on the examples shown, refer to Figure 22 The examples shown are only for illustrative purposes and are not intended to limit the present application.

[0240] In some embodiments, when multiple charging devices 100 share a DC bus 3 and the input module 130 of the charging device 100 includes a second power conversion sub-unit 131, the charging and storage system 300 also includes: a first transformer 311, the primary winding of the first transformer 311 is connected to the AC power grid 1, the second power conversion sub-unit 131 is respectively connected to the secondary winding of the first transformer 311 and the DC bus 3, and the first transformer 311 is used to convert the second AC power provided by the AC power grid 1 into the first AC power; wherein, the second positive power supply terminal and the second negative power supply terminal of the energy storage module 110 in the multiple charging devices 100 are both connected to the DC bus 3.

[0241] For example, refer to Figure 34 The charging and storage system 300 includes multiple charging devices 100 and a first transformer 311. The AC power grid 1 is connected to the second power conversion sub-unit 131 in the input module 130 of the charging device 100 through the first transformer 311; the energy storage modules 110 and charging modules 120 of the multiple charging devices 100 are all connected to the DC bus 3, so that the multiple charging devices 100 share the DC bus 3.

[0242] It should be noted that, in this example, multiple charging devices 100 share the input module 130. Figure 34 For instructions on the examples shown, refer to Figure 22 The examples shown are only for illustrative purposes and are not intended to limit the present application.

[0243] In some embodiments, when multiple charging devices 100 share an AC bus 2 and the input module 130 of the charging device 100 includes a ninth power conversion subunit or multiple tenth power conversion subunits, the charging storage system 300 also includes: a second transformer 312, the primary winding of the second transformer 312 is connected to the AC power grid 1, and the secondary winding of the second transformer 312 is connected to the AC bus 2, for converting the second AC power provided by the AC power grid 1 into the first AC power; wherein, the ninth power conversion subunit or multiple tenth power conversion subunits of the input module 130 in the multiple charging devices 100 are all connected to the AC bus 2.

[0244] For example, refer to Figure 35 The charging and storage system includes multiple charging devices 100 and a second transformer 312. The AC power grid 1 is connected to the AC bus 2 through the second transformer 312; the energy storage modules 110 of the multiple charging devices 100 are all connected to the AC bus 2, so that the multiple charging devices 100 share the AC bus 2.

[0245] It should be noted that Figure 35 For instructions on the examples shown, refer to Figure 29 The examples shown are only for illustrative purposes and are not intended to limit the present application.

[0246] It should be noted that the above explanations of the embodiments and beneficial effects of the charging device are also applicable to the charging and storage system of the embodiments of the present application. To avoid redundancy, they will not be elaborated here.

[0247] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A charging device, characterized in that: include: An energy storage module, wherein the energy storage module includes an energy storage unit and the energy storage unit includes multiple battery subunits, or the energy storage module includes multiple energy storage units and each of the energy storage units includes a battery subunit; each of the energy storage units has a first positive power supply terminal and a first negative power supply terminal, the energy storage unit is connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module through the first positive power supply terminal and the first negative power supply terminal, and the energy storage module is used to provide a first direct current; a charging module, the charging module being connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module, the charging module being configured to provide charging output based on the first DC power, the maximum charging output power of the charging module being greater than or equal to 350 kilowatts, and / or the rated charging output power of the charging module being greater than or equal to 290 kilowatts; Each of the energy storage units includes a battery subunit, and the ratio between the rated energy of the battery subunit and the rated charging output power of the charging module is greater than or equal to 1 / (n2*n3), where n2 is the conversion efficiency, and its value range is 94%~99%, and n3 is the charge and discharge rate, and its value range is 4~6.

2. The charging device according to claim 1, characterized in that Also includes: An input module is used to provide charging energy to each of the energy storage units.

3. The charging device according to claim 2, characterized in that The maximum output power of the input module is less than or equal to 150 kilowatts, and / or the rated output power of the input module is less than or equal to 125 kilowatts.

4. The charging device according to claim 2, wherein: The ratio of the maximum charging output power of the charging module to the maximum output power of the input module is greater than 1 and less than or equal to 15, and / or the ratio of the rated charging output power of the charging module to the rated output power of the input module is greater than 1 and less than or equal to 15.

5. The charging device according to claim 2, characterized in that Each of the energy storage units includes a battery subunit, and a ratio between the rated output power of the input module and the rated energy of the battery subunit is greater than or equal to 1 / n1, where the value range of n1 is 1-4.

6. The charging device according to any one of claims 1 to 5, characterized in that: Each of the energy storage units includes a battery subunit, the ratio between the rated energy of the battery subunit and the rated power of the battery subunit is less than or equal to 1 / 3, and / or the volume energy density of the battery subunit is greater than or equal to 380 watt-hours / liter.

7. The charging device according to any one of claims 1 to 5, characterized in that: The energy storage unit is connected in series and / or in parallel between the second positive power supply terminal and the second negative power supply terminal of the energy storage module via the first positive power supply terminal and the first negative power supply terminal to provide the first direct current.

8. The charging device according to claim 2, characterized in that Each of the energy storage units includes a battery subunit, and each of the energy storage units is configured to provide a second direct current based on the electrical energy of the battery subunit.

9. The charging device according to claim 8, characterized in that Some of the multiple energy storage units further include a first power conversion subunit, which is connected to the first positive power supply terminal and the first negative power supply terminal of the corresponding battery subunit and energy storage unit, respectively, and is used to convert the electrical energy of the battery subunit into the second direct current; Wherein, when the energy storage unit does not include the first power conversion subunit, the battery subunit is connected to the first positive power supply terminal and the first negative power supply terminal of the corresponding energy storage unit to provide the second direct current.

10. The charging device according to claim 8, characterized in that Some of the multiple energy storage units further include a first switch subunit, wherein the first switch subunit is connected to the first positive power supply terminal and the first negative power supply terminal of the corresponding battery subunit and the energy storage unit, respectively, and is configured to connect the corresponding battery subunit to the first positive power supply terminal and the first negative power supply terminal of the energy storage unit when conducting to provide the second direct current; Wherein, when the energy storage unit does not include the first switch subunit, the battery subunit is connected to the first positive power supply terminal and the first negative power supply terminal of the corresponding energy storage unit to provide the second direct current.

11. The charging device according to claim 8, characterized in that Some of the multiple energy storage units further include a first power conversion subunit and a first switch subunit, wherein the first power conversion subunit and the first switch subunit are connected in series between the first positive power supply terminal and the first negative power supply terminal of the corresponding battery subunit and the energy storage unit, and the first power conversion subunit is used to convert the electric energy of the battery subunit into the second direct current when the corresponding first switch subunit is turned on; Wherein, when the energy storage unit does not include the first power conversion subunit and the first switch subunit, the battery subunit is connected to the first positive power supply terminal and the first negative power supply terminal of the corresponding energy storage unit to provide the second direct current.

12. The charging device according to claim 9, characterized in that The first power conversion subunit is a bidirectional DCDC subunit.

13. The charging device according to any one of claims 2 to 5, characterized in that: The input module includes an input interface, which is connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module and is used to provide charging energy to each of the energy storage units based on the third direct current provided by the first external power supply; or The input module includes a second power conversion subunit, which is connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module, and is used to provide charging energy to each of the energy storage units based on the first alternating current provided by the second external power supply.

14. The charging device according to claim 13, characterized in that The second power conversion subunit is a bidirectional ACDC subunit.

15. The charging device according to claim 13, characterized in that The charging module includes a third power conversion subunit and a charging gun. The positive input terminal and the negative input terminal of the third power conversion subunit are correspondingly connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module. The positive output terminal and the negative output terminal of the third power conversion subunit are correspondingly connected to the positive input terminal and the negative input terminal of the charging gun. The third power conversion subunit is used to convert the first direct current into a fourth direct current for charging output through the charging gun.

16. The charging device according to claim 15, characterized in that: The third power conversion sub-unit is a bipolar bidirectional DCDC sub-unit.

17. The charging device according to claim 13, characterized in that The charging module includes a fourth power conversion subunit and a charging gun. The positive input end of the fourth power conversion subunit is connected to the second positive power supply end of the energy storage module, the positive output end of the fourth power conversion subunit is connected to the positive input end of the charging gun, and the negative input end of the charging gun is connected to the second negative power supply end of the energy storage module. The fourth power conversion subunit is used to convert the first direct current into a fourth direct current for charging output through the charging gun.

18. The charging device according to claim 17, characterized in that The fourth power conversion sub-unit is a unipolar bidirectional DCDC sub-unit.

19. The charging device according to any one of claims 2 to 5, characterized in that: The energy storage module also includes a selection unit, which is connected to a plurality of energy storage units and is used to select at least one energy storage unit from the plurality of energy storage units and connect it to the second positive power supply terminal and the second negative power supply terminal of the energy storage module to provide the first direct current.

20. The charging device according to claim 19, characterized in that The energy storage module includes one second positive power supply terminal and one second negative power supply terminal. The selection unit includes multiple second switch sub-units, each of which is connected to one of the energy storage units. Each of the second switch sub-units is connected in series between the first positive power supply terminal of the corresponding energy storage unit and the second positive power supply terminal of the energy storage module. The first negative power supply terminal of at least one energy storage unit is respectively connected to the second negative power supply terminal of the energy storage module. The second switch sub-unit is used to connect the first positive power supply terminal of the corresponding energy storage unit to the second positive power supply terminal of the energy storage module when it is turned on.

21. The charging device according to claim 20, characterized in that The charging module includes a fifth power conversion subunit and a charging gun. The positive input terminal and the negative input terminal of the fifth power conversion subunit are correspondingly connected to the second positive power supply terminal and the second negative power supply terminal of the energy storage module. The positive output terminal and the negative output terminal of the fifth power conversion subunit are correspondingly connected to the positive input terminal and the negative input terminal of the charging gun. The fifth power conversion subunit is used to convert the first direct current into a fourth direct current for charging output through the charging gun.

22. The charging device according to claim 21, characterized in that The fifth power conversion sub-unit is a bipolar bidirectional DCDC sub-unit.

23. The charging device according to claim 20, characterized in that The charging module includes a sixth power conversion subunit and a charging gun. The positive input end of the sixth power conversion subunit is connected to the second positive power supply end of the energy storage module, the positive output end of the sixth power conversion subunit is connected to the positive input end of the charging gun, and the negative input end of the charging gun is connected to the second negative power supply end of the energy storage module. The sixth power conversion subunit is used to convert the first direct current into a fourth direct current for charging output through the charging gun.

24. The charging device according to claim 23, characterized in that The sixth power conversion sub-unit is a unipolar bidirectional DCDC sub-unit.

25. The charging device according to claim 19, wherein: The energy storage module includes multiple second positive power supply terminals, the energy storage module includes one second negative power supply terminal, the selection unit includes multiple second switch sub-units, each of the second switch sub-units is connected to one of the energy storage units and one of the second positive power supply terminals, each of the second switch sub-units is connected in series between the first positive power supply terminal and the corresponding second positive power supply terminal of the corresponding energy storage unit, the first negative power supply terminal of at least one energy storage unit is respectively connected to the second negative power supply terminal of the energy storage module, and the second switch sub-unit is used to connect the first positive power supply terminal of the corresponding energy storage unit to the corresponding second positive power supply terminal when it is turned on.

26. The charging device according to claim 25, characterized in that The charging module includes multiple seventh power conversion sub-units and a charging gun. The positive input terminal and the negative input terminal of each of the seventh power conversion sub-units are correspondingly connected to one of the second positive power supply terminals and the second negative power supply terminals. The positive output terminal and the negative output terminal of each of the seventh power conversion sub-units are correspondingly connected to the positive input terminal and the negative input terminal of the charging gun. The multiple seventh power conversion sub-units are used to convert the first direct current into a fourth direct current for charging output through the charging gun.

27. The charging device according to claim 26, characterized in that The seventh power conversion sub-unit is a bipolar bidirectional DCDC sub-unit.

28. The charging device according to claim 25, characterized in that The charging module includes multiple eighth power conversion sub-units and a charging gun. The positive input end of each of the eighth power conversion sub-units is connected to the second positive power supply end of one of the energy storage modules, the positive output end of each of the eighth power conversion sub-units is connected to the positive input end of the charging gun, and the negative input end of the charging gun is connected to the second negative power supply end of the energy storage module. The multiple eighth power conversion sub-units are used to convert the first direct current into a fourth direct current for charging output through the charging gun.

29. The charging device according to claim 28, characterized in that The eighth power conversion sub-unit is a unipolar bidirectional DCDC sub-unit.

30. The charging device according to claim 19, wherein: The input module includes a ninth power conversion subunit, which is connected to the at least one energy storage unit and is configured to provide charging energy to each of the energy storage units based on the first alternating current provided by the second external power source.

31. The charging device according to claim 30, characterized in that The second external power source is a three-phase AC power source, and the ninth power conversion subunit is a bidirectional three-phase ACDC subunit.

32. The charging device according to claim 19, wherein: The input module includes multiple tenth power conversion subunits, each of which is connected to one of the energy storage units, and the multiple tenth power conversion subunits are used to provide charging energy for each of the energy storage units based on the first alternating current provided by the second external power supply.

33. The charging device according to claim 32, characterized in that The second external power source is a three-phase AC power source, the tenth power conversion sub-units include three, and each of the tenth power conversion sub-units is a bidirectional single-phase ACDC sub-unit.

34. The charging device according to any one of claims 2 to 5, characterized in that: The charging device further includes a wireless communication module, and at least part of the energy storage module, the input module, and the charging module are connected to the wireless communication module so as to exchange information with an external device through the wireless communication module.

35. A charging pile, characterized in that: Comprising a charging device according to any one of claims 1 to 34.

36. A charging and storage system, characterized in that: Comprising a charging device according to any one of claims 1 to 34.

37. The charging and storage system according to claim 36, characterized in that: The charging device includes multiple charging devices, and the multiple charging devices share a DC bus or an AC bus.

38. The charging and storage system according to claim 37, characterized in that: In the case where a plurality of charging devices share one DC bus and the input modules of the charging devices include input interfaces, the system further includes: a first transformer, wherein a primary winding of the first transformer is connected to the AC power grid and is configured to convert a second AC power provided by the AC power grid into a first AC power; a first AC-DC conversion module, the first AC-DC conversion module being connected to the secondary winding of the first transformer and the DC bus, respectively, and configured to convert the first AC power into a third DC power; Wherein, the second positive power supply terminal and the second negative power supply terminal of the energy storage modules in the plurality of charging devices are both connected to the DC bus.

39. The charging and storage system according to claim 37, wherein: In the case where a plurality of charging devices share one DC bus and the input modules of the charging devices include a second power conversion sub-unit, the charging and storage system further includes: a first transformer, wherein the primary winding of the first transformer is connected to the AC power grid, the second power conversion sub-unit is connected to the secondary winding of the first transformer and the DC bus, respectively, and the first transformer is used to convert the second AC power provided by the AC power grid into the first AC power; Wherein, the second positive power supply terminal and the second negative power supply terminal of the energy storage modules in the plurality of charging devices are both connected to the DC bus.

40. The charging storage system according to claim 37, characterized in that In the case where a plurality of charging devices share one AC bus and the input modules of the charging devices include a ninth power conversion subunit or a plurality of tenth power conversion subunits, the charging and storage system further includes: a second transformer, wherein a primary winding of the second transformer is connected to the AC power grid, and a secondary winding of the second transformer is connected to the AC bus, and is configured to convert a second AC power provided by the AC power grid into a first AC power; Wherein, the ninth power conversion subunits of the input modules in the plurality of charging devices or the plurality of tenth power conversion subunits are all connected to the AC bus.

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