Storage and charging station system and control method thereof

Abstract

The invention relates to a storage and charging station system and a control method thereof. The power supply assembly comprises a direct-current bus, and a first power supply module, a second power supply module and a first direct-current / direct-current converter which are connected with the direct-current bus; the first power supply module obtains electric energy from a power grid, the first DC / DC converter is electrically connected to the DC bus and the charging assembly, and the first power supply module supplies power to the charging assembly through the first DC / DC converter; the second power supply module comprises an energy storage battery and a second DC / DC converter electrically connected with the energy storage battery, and the second DC / DC converter is electrically connected with the DC bus and the charging assembly. The first power supply module supplies power to the energy storage battery through the second DC / DC converter, and the energy storage battery supplies power to the charging assembly through the second DC / DC converter. The energy conversion frequency can be reduced, the charging efficiency is improved, and development of the field of electric vehicles is promoted.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to energy storage and charging station systems and their control methods. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, the corresponding battery charging station system technology is a crucial factor in their development.

[0003] In related technologies, the problem of low charging efficiency caused by multiple energy conversions in the energy storage and charging station system restricts the development of the electric vehicle field. Summary of the Invention

[0004] This application provides a power storage and charging station system and its control method. The power storage and charging station system can reduce the number of energy conversions, improve charging efficiency, and promote the development of the electric vehicle field.

[0005] On one hand, according to one embodiment of this application, a power storage and charging station system is provided, including: a charging assembly configured to be connected to a device to be charged; and a power supply component connected to the charging assembly and configured to provide electrical energy to the charging assembly. The power supply component includes a DC bus and a first power supply module, a second power supply module, and a first DC / DC converter respectively connected to the DC bus. The first power supply module is configured to obtain electrical energy from the power grid, and the first DC / DC converter is electrically connected to the DC bus and the charging assembly. The first power supply module supplies power to the charging assembly via the first DC / DC converter. The second power supply module includes an energy storage battery and a second DC / DC converter electrically connected to the energy storage battery. The second DC / DC converter is electrically connected to the DC bus and the charging assembly, so that the first power supply module supplies power to the energy storage battery via the second DC / DC converter, and the energy storage battery supplies power to the charging assembly via the second DC / DC converter.

[0006] One embodiment of this application provides a power storage and charging station system, which includes a charging assembly and a power supply component. The charging assembly can be connected to a device to be charged to transmit electrical energy provided by the power supply component to the device. The power supply component includes a DC bus, a first power supply module, a second power supply module, and a first DC / DC converter. The first DC / DC converter is electrically connected to the DC bus and the charging assembly, allowing the first power supply module to supply power to the charging assembly via the first DC / DC converter, ensuring the charging needs of the device to be charged are met. Furthermore, by including an energy storage battery and a second DC / DC converter electrically connected to the energy storage battery in the second power supply module, and the second DC / DC converter being electrically connected to both the DC bus and the charging assembly, the first power supply module supplies power to the energy storage battery via the second DC / DC converter, and the energy storage battery supplies power to the charging assembly via the second DC / DC converter. This ensures that when the first power supply module is insufficient to meet the power demand of the device to be charged, the second power supply module can supplement the power required by the device, flexibly configuring the capacity of the power storage and charging station system to expand the charging capacity. Furthermore, the second DC / DC converter can be used to transfer the electrical energy from the first power supply module to the energy storage battery for charging, and can also transfer the electrical energy from the energy storage battery to the charging assembly, realizing the reuse of the second DC / DC converter. This can reduce the number of energy conversions, improve charging efficiency, promote the development of the electric vehicle field, and reduce the number of components and lower operating costs.

[0007] According to one aspect of the embodiments of this application, there are multiple second power supply modules, and the second DC / DC converter of each second power supply module is electrically connected to the DC bus and the charging assembly respectively.

[0008] One embodiment of this application provides a power storage and charging station system that utilizes multiple second power supply modules. Each second power supply module's second DC / DC converter is electrically connected to a DC bus and the charging assembly. Each energy storage battery is connected to a single second DC / DC converter, ensuring independence between different energy storage batteries. The state of each energy storage battery is independently detected, and charging and discharging are independently controlled, achieving battery-level management. This eliminates the inconsistency issues caused by series and parallel connections between energy storage batteries, improving battery lifespan and thus enhancing the stability and reliability of the power storage and charging station system. Furthermore, by connecting multiple second DC / DC converters to energy storage batteries, each energy storage battery can be directly connected to the grid, effectively allowing each battery in the system to be calculated independently, overcoming the limitations of the "weakest link" principle.

[0009] According to one aspect of the embodiments of this application, the power supply assembly further includes a first switch assembly and a second switch assembly, wherein the second DC / DC converter of each second power supply module is connected to the DC bus through the first switch assembly and to the charging assembly through the second switch assembly.

[0010] The energy storage and charging station system provided in one embodiment of this application, with the arrangement of a first switch assembly and a second switch assembly, facilitates the connection and disconnection between the second DC / DC converter and the charging assembly, as well as the connection and disconnection between the second DC / DC converter and the DC bus, thereby ensuring the timing of power supply from the first power supply module to the charging terminal and the energy storage battery, and the timing of power supply from the energy storage battery to the charging terminal.

[0011] According to one aspect of the embodiments of this application, the first DC / DC converter includes a unidirectional DC / DC converter, and the second DC / DC converter includes a bidirectional DC / DC converter.

[0012] One embodiment of this application provides a power storage and charging station system that, through the above-described configuration, facilitates the transmission and conversion of electrical energy, ensuring the functional requirements of the power storage and charging station system.

[0013] According to one aspect of the embodiments of this application, the charging assembly includes a power distribution cabinet and a plurality of charging terminals, a first DC / DC converter and a second DC / DC converter are respectively connected to the power distribution cabinet, and each charging terminal is respectively connected to the power distribution cabinet.

[0014] One embodiment of this application provides a power storage and charging station system that includes a power distribution cabinet and multiple charging terminals in the charging assembly. Each charging terminal can be connected to at least one device to be charged, and the power distribution cabinet can allocate the required output power to each charging terminal, enabling the power storage and charging station system to simultaneously meet the charging needs of multiple devices to be charged.

[0015] According to one aspect of the embodiments of this application, the power distribution cabinet includes a controller and a contactor, the controller being configured to control the contactor to cause the charging terminal to obtain electrical energy from a first DC / DC converter and / or any second DC / DC converter.

[0016] One embodiment of this application provides a power distribution cabinet with the above-described structure. It can be connected to the corresponding charging terminal through a contactor, and the controller can control the contactor to open and close to output power. The contactor can be configured in a full matrix, which can enable the first DC / DC converter and / or any second DC / DC converter to supply power to any charging terminal, so that any charging terminal can obtain the maximum power and realize flexible power distribution.

[0017] According to one aspect of the embodiments of this application, the first power supply module includes a box-type transformer and an AC / DC converter connected together, the AC / DC converter being connected to a DC bus.

[0018] The energy storage and charging station system provided in one embodiment of this application, through the above-mentioned settings, can convert the AC 380V voltage of the power grid into a DC bus with a fixed voltage, and can also convert the DC bus into AC power to feed back to the power grid and participate in the energy regulation of the power grid.

[0019] According to one aspect of the embodiments of this application, the power supply component further includes a third power supply module connected to the DC bus. The third power supply module is configured to acquire a first energy source and convert the first energy source into electrical energy and transmit it to the DC bus. The first energy source includes either solar energy or wind energy.

[0020] The third power supply module can be powered by wind or solar energy. The electrical energy obtained by the third power supply module can be directly used by the charging assembly to power the device to be charged. Alternatively, it can be used by the second power supply module, stored in an energy storage battery, and released and delivered to the charging assembly as needed for the device to be charged.

[0021] On the other hand, according to one embodiment of this application, a control method for the energy storage and charging station system provided in the above embodiments is provided, comprising:

[0022] Obtain the required output power of the charging assembly;

[0023] When the required output power is greater than the rated power provided by the first power supply module, the first DC / DC converter is controlled to be in working state so that the first power supply module supplies power to the charging assembly through the first DC / DC converter; the second power supply module is controlled to be disconnected from the DC bus and connected to the charging assembly so that the energy storage battery supplies power to the charging assembly through the second DC / DC converter.

[0024] One embodiment of this application provides a control method that enables the energy storage and charging station system to meet the charging power demand when the power supplied by the existing power grid to the first power supply module cannot meet the charging power requirements when there are many devices to be charged. The power converted from the grid to the DC bus by the first power supply module is then sent to the power distribution cabinet through the first DC / DC converter. At the same time, the energy storage batteries of the corresponding number of second power supply modules are also connected to the power distribution cabinet through the second DC / DC converter, so as to charge the devices to be charged together, thereby achieving the purpose of expanding the charging capacity.

[0025] According to another aspect of the embodiments of this application, the control method further includes:

[0026] When the required output power is less than the rated power provided by the first power supply module, the second power supply module is disconnected from the charging assembly.

[0027] One embodiment of this application provides a control method that enables the power supplied by the existing power grid to the first power supply module to meet the charging power demand when the power storage and charging station system has a small number of devices waiting to be charged. This allows the power from the municipal power grid to be converted to the DC bus by the first power supply module and then to the power distribution cabinet via the first DC / DC converter. At this time, both the first and second switching components can be disconnected to ensure the charging needs of the devices waiting to be charged under different operating conditions.

[0028] According to another aspect of the embodiments of this application, the control method further includes:

[0029] The remaining power of the energy storage battery is obtained. When the remaining power is lower than a first preset threshold, the second power supply module is connected to the DC bus, so that the first power supply module supplies power to the energy storage battery through the second DC / DC converter.

[0030] The control method provided in one embodiment of this application, through the above settings, enables the first power supply module to transfer excess power to the energy storage battery with insufficient power while supplying power to the charging assembly when the first power supply module obtains power from the power grid to charge the device to be charged, thereby ensuring the utilization rate of power and the charging demand.

[0031] According to another aspect of the embodiments of this application, the control method further includes:

[0032] When the required output power is zero, the first DC / DC converter is controlled to stop working, and the second power supply module is controlled to be connected to the DC bus and disconnected from the charging assembly, so that the first power supply module supplies power to the energy storage battery through the second DC / DC converter.

[0033] The control method provided in one embodiment of this application, through the above settings, enables the energy storage batteries of each second power supply module to be fully charged in advance through the first power supply module when there is no charging device to charge, thus ensuring the expansion requirements.

[0034] According to another aspect of the embodiments of this application, the energy storage and charging station system further includes a third power supply module connected to a DC bus. The third power supply module is configured to acquire a first energy source and convert the first energy source into electrical energy for transmission to the DC bus. The first energy source includes one of solar energy and wind energy. The control method further includes:

[0035] The first DC / DC converter is controlled to be in operation so that the electrical energy converted by the third power supply module is delivered to the charging assembly via the DC bus and the first DC / DC converter; or, the second power supply module is controlled to be connected to the DC bus and disconnected from the charging assembly so that the electrical energy converted by the third power supply module is delivered to the energy storage battery via the DC bus and the second DC / DC converter. Attached Figure Description

[0036] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0037] Figure 1 This is a functional block diagram of a power storage and charging station system according to an embodiment of this application;

[0038] Figure 2 This is a functional block diagram of a power storage and charging station system according to another embodiment of this application;

[0039] Figure 3 This is a flowchart illustrating a control method for a power storage and charging station system according to an embodiment of this application.

[0040] Figure 4 This is a functional block diagram of a power storage and charging station system according to an embodiment of this application in one working state;

[0041] Figure 5 This is a functional block diagram of a power storage and charging station system according to one embodiment of this application in another working state;

[0042] Figure 6 This is a functional block diagram of a power storage and charging station system according to one embodiment of this application in another working state.

[0043] in:

[0044] 11-First power supply module; 111-Box-type transformer; 112-AC / DC converter;

[0045] 12-Second power supply module; 121-Energy storage battery; 122-Second DC / DC converter;

[0046] 13 - First DC / DC converter;

[0047] 14-First switch assembly;

[0048] 15-Second switch assembly;

[0049] 16-Third power supply module; 161-Photovoltaic cell; 162-Third DC / DC converter;

[0050] AA - DC bus;

[0051] 20 - Charging assembly; 21 - Power distribution cabinet; 22 - Charging terminal;

[0052] 30 - Device to be charged.

[0053] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0054] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0055] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0056] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0057] Furthermore, technical terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0058] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0059] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] With the rapid development of electric vehicles, energy storage and charging station systems are being built on a large scale in China. However, the charging demand is significantly constrained by the power distribution capacity of the grid's transformer substations. Adding energy storage batteries to these systems can expand the rechargeable capacity, meet the charging needs of more electric vehicles, and make full use of grid resources.

[0061] Traditional energy storage and charging station systems suffer from efficiency reduction due to energy conversion. Further research reveals that in conventional systems, when the energy from the storage battery is transferred to the device being charged, it must first pass through a DC / DC converter to the DC bus, then through a DC / DC charging module and finally the charging pile. The DC / DC converter's efficiency is typically 95%, but after two stages of conversion, the battery's efficiency drops to 93%, and the higher the conversion power, the greater the losses. In other words, traditional energy storage and charging station systems suffer from low charging efficiency due to the use of numerous components and multiple energy conversions, hindering the development of the electric vehicle industry.

[0062] Based on this, one embodiment of this application provides a power storage and charging station system, which aims to solve the problem that power storage and charging station systems use a large number of components and have low charging efficiency due to multiple energy conversions.

[0063] Please see Figure 1 As shown, one embodiment of this application provides a power storage and charging station system, including a charging assembly 20 and a power supply component. The charging assembly 20 is configured to be connected to a device 30 to be charged. The power supply component is connected to the charging assembly 20 and configured to provide electrical energy to the charging assembly 20. The power supply component includes a DC bus AA and a first power supply module 11, a second power supply module 12, and a first DC / DC converter 13, which are respectively connected to the DC bus AA. The first power supply module 11 is configured to obtain electrical energy from the power grid. The first DC / DC converter 13 is electrically connected to the DC bus AA and the charging assembly 20. The first power supply module 11 supplies power to the charging assembly 20 via the first DC / DC converter 13. The second power supply module 12 includes an energy storage battery 121 and a second DC / DC converter 122 electrically connected to the energy storage battery 121. The second DC / DC converter 122 is electrically connected to the DC bus AA and the charging assembly 20, so that the first power supply module 11 supplies power to the energy storage battery 121 through the second DC / DC converter 122 and the energy storage battery 121 supplies power to the charging assembly 20 through the second DC / DC converter 122.

[0064] The charging assembly 20 may include at least one charging terminal 22 for connection to the device 30 to be charged, which may be directly or indirectly electrically connected. The number of charging terminals 22 may be one, two, or more. The device 30 to be charged includes, but is not limited to, electric vehicles, electric motorcycles, etc.

[0065] The first power supply module 11 can obtain power directly or indirectly from the power grid, and optionally can convert 380V AC voltage into a fixed voltage.

[0066] The first DC / DC converter 13 can be a unidirectional or bidirectional DC / DC converter, with a preference for the unidirectional type. The first DC / DC converter 13 can be directly or indirectly connected to the DC bus AA and the charging assembly 20, allowing the first power supply module 11 to directly supply power to the charging assembly 20 via the first DC / DC converter 13.

[0067] The number of second power supply modules 12 can be one or more. When there are multiple second power supply modules 12, they can be electrically connected to the DC bus AA respectively.

[0068] The energy storage battery 121 included in the second power supply module 12 can be a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application can include a battery module or a battery pack, etc. The number of energy storage batteries 121 included in the second power supply module 12 can be one or more, and can be selected as one.

[0069] The battery cell can be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc., but the embodiments of this application are not limited to this.

[0070] A battery cell can be a rechargeable battery cell, which refers to a battery cell that can be recharged after being discharged to activate the active materials and continue to be used.

[0071] The battery cell can be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc., but the embodiments of this application are not limited to this.

[0072] A single battery cell typically includes an electrode assembly. The electrode assembly consists of a positive electrode and a negative electrode. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes.

[0073] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a layer of positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0074] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material layer is disposed on either or both of the two opposite surfaces of the positive current collector.

[0075] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, stainless steel, copper, aluminum, nickel, silver-coated aluminum, silver-coated stainless steel, carbon electrodes, carbon, nickel, or titanium can be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0076] As an example, the positive electrode active material layer includes a positive electrode active material. The positive electrode active material may include at least one of the following materials: lithium phosphates, lithium transition metal oxides, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphates include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium iron manganese phosphate, and lithium iron manganese phosphate and carbon composites. Examples of lithium transition metal oxides include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, and lithium nickel cobalt manganese oxide (such as LiNi). 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (also known as NCM) 333 ), Li Ni 0.5 Co 0.2 Mn 0.3 O2 (also known as NCM) 523 Li Ni 0.5 Co 0.25 Mn 0.25 O2 (also known as NCM) 211 ), LiNi 0.6 Co 0.2 Mn 0.2 O2 (also known as NCM) 622 ), LiN i 0.8 Co 0.1 Mn 0.1O2 (also known as NCM) 811 ), lithium nickel cobalt aluminum oxide (such as LiNi) 0.80 Co 0.15 Al 0.05 At least one of O2 and its modified compounds.

[0077] In some embodiments, the positive electrode can be made of foamed carbon or foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, or foamed alloys, etc. When foamed metal is used as the positive electrode, the surface of the foamed metal may or may not contain a positive electrode active material. As an example, lithium source material, potassium metal, or sodium metal can also be filled and / or deposited within the foamed metal, where the lithium source material is lithium metal and / or lithium-rich material.

[0078] In some embodiments, the negative electrode may be a negative electrode sheet, which may include a negative electrode current collector and a layer of negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0079] As an example, the negative electrode current collector can be a metal foil, foamed metal, foamed carbon, or a composite current collector. For example, as a metal foil, stainless steel, copper, aluminum, nickel, silver-treated aluminum, silver-treated stainless steel, carbon electrodes, carbon, nickel, or titanium can be used. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, or foamed alloys. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0080] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as battery negative electrode active materials may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0081] In some embodiments, the negative electrode can be made of foamed carbon or foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, or foamed alloy, etc. When foamed metal is used as the negative electrode sheet, the surface of the foamed metal may or may not have a negative electrode active material.

[0082] As an example, lithium source material, potassium metal or sodium metal may also be filled or deposited in the negative electrode current collector, wherein the lithium source material is lithium metal and / or lithium-rich material.

[0083] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0084] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0085] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0086] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes.

[0087] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrode plates, serving both to transport ions and to isolate the positive and negative electrodes.

[0088] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0089] In some embodiments, the liquid electrolyte includes an electrolyte salt and a solvent.

[0090] In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.

[0091] In some embodiments, the solvent may be selected from at least one of ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be an ether solvent. Ether solvents may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ethers.

[0092] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0093] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0094] A first connection can be provided between the second DC / DC converter 122 and the DC bus AA to enable connection or disconnection between them. A second connection can be provided between the second DC / DC converter 122 and the charging terminal 22 to enable connection or disconnection between them. The first and second connections can be switching components, switching circuits capable of switching on and off, or rheostat structures, etc. When a rheostat structure is used, the connection can be achieved by changing the resistance. This enables the connection or disconnection between the second DC / DC converter 122 and the DC bus AA and the charging terminal 22.

[0095] One embodiment of this application provides a power storage and charging station system, which includes a charging assembly 20 and a power supply component. The charging assembly 20 can be connected to a device 30 to be charged, so as to transmit the electrical energy provided by the power supply component to the device 30 to be charged. Since the power supply component includes a DC bus AA, a first power supply module 11, a second power supply module 12, and a first DC / DC converter 13, and the first DC / DC converter 13 is electrically connected to the DC bus AA and the charging assembly 20, the first power supply module 11 supplies power to the charging assembly 20 through the first DC / DC converter 13, ensuring the charging needs of the device 30 to be charged. By including an energy storage battery 121 and a second DC / DC converter 122 electrically connected to the energy storage battery 121, and the second DC / DC converter 122 being electrically connected to the DC bus AA and the charging assembly 20 respectively, the first power supply module 11 supplies power to the energy storage battery 121 via the second DC / DC converter 122, and the energy storage battery 121 supplies power to the charging assembly 20 via the second DC / DC converter 122. This ensures that when the first power supply module 11 is insufficient to meet the power demand of the device 30 to be charged, the second power supply module 12 can supplement the power demand of the device 30 to be charged, flexibly configuring the capacity of the charging station system and realizing the expansion of charging capacity. Furthermore, the second DC / DC converter 122 can be used to transfer the electrical energy of the first power supply module 11 to the energy storage battery 121 for charging, and can also transfer the electrical energy of the energy storage battery 121 to the charging assembly 20, realizing the reuse of the second DC / DC converter 122. This reduces the number of energy conversions, improves charging efficiency, promotes the development of the electric vehicle field, and reduces the number of components and lowers operating costs.

[0096] Continue reading Figure 1 As shown, in some optional embodiments, in one embodiment of the present application, the number of second power supply modules 12 is multiple, and the second DC / DC converter 122 of each second power supply module 12 is electrically connected to the DC bus AA and the charging assembly 20 respectively.

[0097] The number of second power supply modules 12 can be two, three, or more.

[0098] Multiple second power supply modules 12 can be set independently, and the second DC / DC converter 122 of each second power supply module 12 is connected to the DC bus AA and the charging terminal 22 respectively.

[0099] In traditional energy storage and charging schemes, multiple energy storage batteries (121) are connected in series to form a battery pack, and multiple battery packs are connected in parallel to a DC bus, which is then connected to a DC / DC converter. This results in inconsistencies in current during both series and parallel connections.

[0100] The problem of inconsistent current series connection is mainly manifested in the fact that due to the differences in individual battery cells and temperature, the remaining power of each battery in the energy storage battery 121 will be different. As long as one battery is fully charged or discharged, all batteries in the group will stop charging and discharging.

[0101] The problem of inconsistent current in parallel connection is mainly manifested in the following ways: due to the small internal resistance of the battery, even if the voltage difference between the energy storage batteries is only a few volts, the uneven current between the groups will be large. The deviation current will cause some energy storage battery groups to overcharge and over-discharge, which will greatly affect the charging and discharging efficiency, battery life and even lead to serious safety accidents.

[0102] The energy storage and charging station system provided in one embodiment of this application, by having multiple second power supply modules 12, with each second power supply module 12's second DC / DC converter 122 electrically connected to the DC bus AA and the charging assembly 20 respectively, adopts a single energy storage unit connected to one second DC / DC converter 122. Different energy storage batteries 121 are independent of each other, with independent state detection and charging / discharging control of each energy storage battery 121. This achieves package-level management of the energy storage batteries 121, eliminating the inconsistency problems caused by series and parallel connections between energy storage batteries 121, improving the lifespan of the energy storage batteries 121, and thus enhancing the stability and reliability of the energy storage and charging station system. Furthermore, after connecting multiple second DC / DC converters 122 to the energy storage batteries 121 respectively, each energy storage battery 121 can be directly connected to the grid, meaning each energy storage battery 121 in the system can be calculated independently, breaking the limitation of the "weakest link" principle.

[0103] In some optional embodiments, the power supply components of the energy storage and charging station system provided in one embodiment of this application further include a first switch assembly 14 and a second switch assembly 15. The second DC / DC converter 122 of each second power supply module 12 is connected to the DC bus AA through the first switch assembly 14 and to the charging assembly 20 through the second switch assembly 15.

[0104] Each second power supply module 12 has a corresponding first switch assembly 14 that can be electrically connected between the second DC / DC converter 122 and the DC bus AA. The connection and disconnection between the second DC / DC converter 122 and the DC bus AA are achieved by turning the first switch assembly 14 on and off. A second switch assembly 15 can be electrically connected between the second DC / DC converter 122 and the charging assembly 20. The connection and disconnection between the second DC / DC converter 122 and the charging assembly 20 are achieved by turning the second switch assembly 15 on and off.

[0105] The energy storage and charging station system provided in one embodiment of this application, wherein the arrangement of the first switch assembly 14 and the second switch assembly 15 facilitates the connection and disconnection between the second DC / DC converter 122 and the charging assembly 20, and the connection and disconnection between the second DC / DC converter 122 and the DC bus AA, thereby facilitating the timing of the first power supply module 11 supplying power to the charging terminal 22 and the energy storage battery 121, and the timing of the energy storage battery 121 supplying power to the charging terminal 22.

[0106] In some alternative embodiments, one embodiment of the present application provides a power storage and charging station system in which the first DC / DC converter 13 includes a unidirectional DC / DC converter and the second DC / DC converter 122 includes a bidirectional DC / DC converter.

[0107] A unidirectional DC / DC converter is connected between the DC bus AA and the charging assembly 20. A bidirectional DC / DC converter is connected between the energy storage battery 121 and the DC bus AA, and between the energy storage battery 121 and the charging assembly 20.

[0108] One embodiment of this application provides a power storage and charging station system that, through the above-described configuration, facilitates the transmission and conversion of electrical energy, ensuring the functional requirements of the power storage and charging station system.

[0109] It is understood that the above is only one optional implementation method. In some embodiments, both the first DC / DC converter 13 and the second DC / DC converter 122 may include bidirectional DC / DC converters, as long as the functional requirements of the energy storage and charging station system can be guaranteed.

[0110] In some optional embodiments, one embodiment of the present application provides a power storage and charging station system, wherein the charging assembly 20 includes a power distribution cabinet 21 and a plurality of charging terminals 22, a first DC / DC converter 13 and a second DC / DC converter 122 are respectively connected to the power distribution cabinet 21, and each charging terminal 22 is respectively connected to the power distribution cabinet 21.

[0111] The number of charging terminals 22 can be two, three, or more, and each charging terminal 22 is electrically connected to the power distribution cabinet 21. The charging terminals 22 include, but are not limited to, charging equipment such as charging piles.

[0112] The model and specifications of each charging terminal 22 can be the same. Of course, at least two charging terminals 22 can also use different models and specifications to select different corresponding charging terminals 22 according to different devices to be powered. For example, some charging terminals 22 can be ordinary charging terminal structures, while others can be supercharging terminal structures, and can have different charging functions according to different needs.

[0113] One embodiment of this application provides a power storage and charging station system, in which the charging assembly 20 includes a power distribution cabinet 21 and a plurality of charging terminals 22, so that each charging terminal 22 can be connected to at least one device 30 to be charged, and the power distribution cabinet 21 can allocate the corresponding required output power to each charging terminal 22, so that the power storage and charging station system can simultaneously meet the charging needs of multiple devices 30 to be charged.

[0114] In some alternative embodiments, one embodiment of the present application provides a power distribution cabinet 21 including a controller and a contactor. The controller is configured to control the contactor to enable the charging terminal 22 to obtain electrical energy from a first DC / DC converter 13 and / or any second DC / DC converter 122.

[0115] The controller can control the corresponding charging terminal 22 to selectively obtain power from the first DC / DC converter 13, or from any at least one second DC / DC converter 122. Of course, it can also simultaneously obtain power from the first DC / DC converter 13 and at least one second DC / DC converter 122.

[0116] In one embodiment of this application, a power distribution cabinet 21 is provided with the above-described structure. It can be connected to the corresponding charging terminal 22 via a contactor, and the contactor can be controlled by a controller to open and close to output power. The contactor can be configured in a full matrix, which can enable the first DC / DC converter 13 and / or any second DC / DC converter 122 to supply power to any charging terminal 22, so that any charging terminal 22 can obtain the maximum power and realize flexible power distribution.

[0117] In some optional embodiments, one embodiment of the present application provides a power storage and charging station system in which the first power supply module 11 includes a box-type transformer 111 and an AC / DC converter 112 connected to each other, and the AC / DC converter 112 is connected to the DC bus AA.

[0118] One embodiment of this application provides a power storage and charging station system that, through the above-described configuration, converts the AC 380V voltage of the power grid into a fixed voltage DC bus AA, and can also convert the DC bus AA into AC power to feed back to the power grid, participating in the power grid's energy regulation.

[0119] See Figure 2 As shown, in some optional embodiments, the power supply component of the energy storage and charging station system provided in one embodiment of this application further includes a third power supply module 16 connected to the DC bus AA. The third power supply module 16 is configured to acquire a first energy source and convert the first energy source into electrical energy and transmit it to the DC bus AA. The first energy source includes either solar energy or wind energy.

[0120] The third power supply module 16 can be powered by wind or solar energy. When using wind energy, it can include, for example, a wind turbine generator. When using solar energy, it can include, for example, a photovoltaic cell 161. For example, to ensure that the electrical energy converted by the third power supply module 16 can meet the usage requirements, the third power supply module 16 can include a third DC / DC converter 162 and a photovoltaic cell 161. The third DC / DC converter 162 can be connected between the photovoltaic cell 161 and the DC bus AA.

[0121] The electrical energy obtained by the third power supply module 16 can be directly used by the charging assembly 20 to power the device 30 to be charged. Of course, it can also be used by the second power supply module 12, stored in the energy storage battery 121, and released and delivered to the charging assembly 20 as needed for use by the device 30 to be charged.

[0122] According to some embodiments of this application, this application provides a power storage and charging station system, including a charging assembly 20 and a power supply component. The charging assembly 20 includes a power distribution cabinet 21 and multiple charging terminals 22. The power distribution cabinet 21 includes a controller and a contactor. The power supply component includes a DC bus AA, a first power supply module 11, a second power supply module 12, a third power supply module 16, a first DC / DC converter 13, a first switch assembly 14, and a second switch assembly 15. The first power supply module 11 includes a box-type transformer 111 and an AC / DC converter 112 connected to each other. The AC / DC converter 112 is connected to the DC bus AA and is configured to obtain power from the power grid. The first DC / DC converter 13 is electrically connected to the DC bus AA and the power distribution cabinet 21. The first power supply module 11 supplies power to the charging assembly 20 via the first DC / DC converter 13. There are multiple second power supply modules 12, and the number of first switch assemblies 14 and second switch assemblies 15 are equal to the number of second power supply modules 12. Each second power supply module 12 is provided with a first switch assembly 14 and a second switch assembly 15. Each second power supply module 12 includes an energy storage battery 121 and a second DC / DC converter 122 electrically connected to the energy storage battery 121. Each second DC / DC converter 122 is connected to the DC bus AA via a corresponding first switch assembly 14 and to the power distribution cabinet 21 via a second switch assembly 15, so that the first power supply module 11 supplies power to the energy storage battery 121 via the second DC / DC converter 122, and the energy storage battery 121 supplies power to the charging assembly 20 via the second DC / DC converter 122. The third power supply module 16 includes a photovoltaic cell 161 and a third DC / DC converter 162. The third DC / DC converter 162 is connected between the photovoltaic cell 161 and the DC bus AA to convert solar energy into electrical energy and transmit it to the DC bus AA.

[0123] like Figure 3 as well as Figure 4 As shown, in another aspect, one embodiment of this application also provides a control method for the energy storage and charging station system provided in the above embodiments, including:

[0124] S100, Obtain the required output power of the charging assembly 20;

[0125] S200: When the required output power is greater than the rated power provided by the first power supply module 11, control the first DC / DC converter 13 to be in working state so that the first power supply module 11 supplies power to the charging assembly 20 through the first DC / DC converter 13; control the second power supply module 12 to be disconnected from the DC bus AA and connected to the charging assembly 20 so that the energy storage battery 121 supplies power to the charging assembly 20 through the second DC / DC converter 122.

[0126] In step S100, obtaining the required output power of the charging assembly 20 can be understood as the charging power required by all the devices 30 to be charged connected to the charging assembly 20.

[0127] In step S200, the first DC / DC converter 13 is controlled to be in working state, so that the electrical energy obtained by the first power supply module 11 from the power grid can be transmitted to the charging assembly 20 through the first DC / DC converter 13. At the same time, the second power supply module 12 is controlled to be disconnected from the DC bus AA and connected to the charging assembly 20, so that the energy storage battery 121 supplies power to the charging assembly 20 through the second DC / DC converter 122.

[0128] The control method provided in one embodiment of this application enables the power supplied by the existing power grid to the first power supply module 11 to meet the charging power demand when there are many devices 30 to be charged in the energy storage and charging station system. This allows the power converted from the mains power grid to the DC bus AA by the first power supply module 11 to be sent to the power distribution cabinet 21 through the first DC / DC converter 13. At the same time, the energy storage batteries 121 of the corresponding number of second power supply modules 12 are also connected to the power distribution cabinet 21 through the second DC / DC converter 122, so as to charge the devices 30 to be charged together, thereby achieving the purpose of expanding the charging capacity.

[0129] The control methods provided in the above embodiments, when including a first switch assembly 14 and a second switch assembly 15, can cause the first switch assembly 14 to be disconnected and the second switch assembly 15 to be closed.

[0130] In some optional embodiments, the control method provided in some embodiments of this application further includes: when the required output power is less than the rated power provided by the first power supply module 11, controlling the second power supply module 12 to disconnect from the charging assembly 20.

[0131] In other words, when the electrical energy obtained by the first power supply module 11 is sufficient for the device to be charged 30, the second power supply module 12 can be disconnected from the charging assembly 20. When the first switch assembly 14 and the second switch assembly 15 are included, the second switch assembly 15 can be disconnected, thereby disconnecting the second DC / DC converter 122 of the second power supply module 12 from the charging assembly 20.

[0132] The control method provided in one embodiment of this application enables the power supplied by the existing power grid to the first power supply module 11 to meet the charging power requirements when the power storage and charging station system is facing a small number of devices 30 to be charged. This allows the power from the mains grid to be converted to the DC bus AA by the first power supply module 11 and then to the power distribution cabinet 21 via the first DC / DC converter 13. At this time, both the first switch assembly 14 and the second switch assembly 15 can be disconnected to ensure the charging needs of the devices 30 to be charged under different operating conditions.

[0133] like Figure 5 As shown, in some optional embodiments, the control method provided in one embodiment of this application further includes: obtaining the remaining power of the energy storage battery 121, and when the remaining power is lower than a first preset threshold, controlling the second power supply module 12 to be connected to the DC bus AA, so that the first power supply module 11 supplies power to the energy storage battery 121 through the second DC / DC converter 122.

[0134] When there are multiple second power supply modules 12, the remaining power of the energy storage battery 121 of each second power supply module 12 can be obtained. When the remaining power of the energy storage battery 121 of the corresponding second power supply module 12 is lower than the first preset threshold, the second power supply module 12 can be connected to the DC bus AA. Specifically, the first switch component 14 corresponding to the second power supply module 12 can be closed, so that the first power supply module 11 supplies power to the energy storage battery 121 through the second DC / DC converter 122.

[0135] The control method provided in one embodiment of this application, through the above settings, enables the first power supply module 11 to transfer excess power to the energy storage battery 121 with insufficient power for storage while supplying power to the charging assembly 20 during the charging process of the charging device 30 with the power obtained from the grid, thereby ensuring the utilization rate of power and the charging demand.

[0136] Continue reading Figure 5As shown, in some optional embodiments, one embodiment of the present application provides a control method that, when the required output power is zero, controls the first DC / DC converter 13 to be in a stopped working state, controls the second power supply module 12 to be connected to the DC bus AA and disconnected from the charging assembly, so that the first power supply module 11 supplies power to the energy storage battery 121 through the second DC / DC converter 122.

[0137] During charging idle time, the power from the mains grid, converted to DC bus AA by the first power supply module 11, charges the coarse-energy battery through the second DC / DC converter 122. At this time, the first switch assembly 14 can be closed and the second switch assembly 15 can be opened.

[0138] The control method provided in one embodiment of this application, through the above settings, enables the energy storage batteries 121 of each second power supply module 12 to be fully charged in advance through the first power supply module 11 when there is no charging device 30 to charge, thus ensuring the expansion requirements.

[0139] like Figure 6 As shown, in some optional embodiments, when the energy storage and charging station system further includes a third power supply module 16 connected to the DC bus AA, the control method provided in one embodiment of this application further includes controlling the first DC / DC converter 13 to be in a working state, so that the electrical energy converted by the third power supply module 16 is delivered to the charging assembly 20 via the DC bus AA and the first DC / DC converter 13; or, controlling the second power supply module 12 to be connected to the DC bus AA and disconnected from the charging assembly 20, so that the electrical energy converted by the third power supply module 16 is delivered to the energy storage battery 121 via the DC bus AA and the second DC / DC converter 122.

[0140] The first energy source can be converted into electrical energy through the third power supply module 16 and used to charge the energy storage battery 121, or directly used to charge the charging assembly 20 to charge the device 30 to be charged, thereby further ensuring the energy storage and charging effect of the energy storage and charging station system.

[0141] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A power storage and charging station system, characterized in that, include: The charging assembly is configured to connect to the device to be charged. A power supply assembly, connected to the charging assembly and configured to provide electrical energy to the charging assembly, the power supply assembly including a DC bus and a first power supply module, a second power supply module and a first DC / DC converter respectively connected to the DC bus; The first power supply module is configured to obtain power from the power grid, and the first DC / DC converter is electrically connected to the DC bus and the charging assembly. The first power supply module supplies power to the charging assembly via the first DC / DC converter. The second power supply module includes an energy storage battery and a second DC / DC converter electrically connected to the energy storage battery. The second DC / DC converter is electrically connected to the DC bus and the charging assembly, respectively, so that the first power supply module supplies power to the energy storage battery through the second DC / DC converter and the energy storage battery supplies power to the charging assembly through the second DC / DC converter.

2. The energy storage and charging station system according to claim 1, characterized in that, There are multiple second power supply modules, and the second DC / DC converter of each second power supply module is electrically connected to the DC bus and the charging assembly.

3. The energy storage and charging station system according to claim 1 or 2, characterized in that, The power supply assembly further includes a first switch assembly and a second switch assembly. The second DC / DC converter of each second power supply module is connected to the DC bus through the first switch assembly and to the charging assembly through the second switch assembly.

4. The energy storage and charging station system according to any one of claims 1 to 3, characterized in that, The first DC / DC converter includes a unidirectional DC / DC converter, and the second DC / DC converter includes a bidirectional DC / DC converter.

5. The energy storage and charging station system according to any one of claims 1 to 4, characterized in that, The charging assembly includes a power distribution cabinet and multiple charging terminals. The first DC / DC converter and the second DC / DC converter are respectively connected to the power distribution cabinet, and each charging terminal is respectively connected to the power distribution cabinet.

6. The energy storage and charging station system according to claim 5, characterized in that, The power distribution cabinet includes a controller and a contactor, the controller being configured to control the contactor to allow the charging terminal to obtain power from the first DC / DC converter and / or any of the second DC / DC converters.

7. The energy storage and charging station system according to any one of claims 1 to 6, characterized in that, The first power supply module includes a box-type transformer and an AC / DC converter connected together, and the AC / DC converter is connected to the DC bus.

8. The energy storage and charging station system according to any one of claims 1 to 7, characterized in that, The power supply component further includes a third power supply module connected to the DC bus. The third power supply module is configured to acquire a first energy source and convert the first energy source into electrical energy and transmit it to the DC bus. The first energy source includes either solar energy or wind energy.

9. A control method for a power storage and charging station system as described in any one of claims 1 to 8, characterized in that, include: Obtain the required output power of the charging assembly; When the required output power is greater than the rated power provided by the first power supply module, the first DC / DC converter is controlled to be in working state so that the first power supply module supplies power to the charging assembly through the first DC / DC converter; the second power supply module is controlled to be disconnected from the DC bus and connected to the charging assembly so that the energy storage battery supplies power to the charging assembly through the second DC / DC converter.

10. The control method according to claim 9, characterized in that, The control method further includes: When the required output power is less than the rated power provided by the first power supply module, the second power supply module is disconnected from the charging assembly.

11. The control method according to claim 10, characterized in that, The control method further includes: The remaining power of the energy storage battery is obtained. When the remaining power is lower than a first preset threshold, the second power supply module is connected to the DC bus, so that the first power supply module supplies power to the energy storage battery through the second DC / DC converter.

12. The control method according to claim 9, characterized in that, The control method further includes: When the required output power is zero, the first DC / DC converter is controlled to stop working, and the second power supply module is controlled to be connected to the DC bus and disconnected from the charging assembly, so that the first power supply module supplies power to the energy storage battery through the second DC / DC converter.

13. The control method according to any one of claims 9 to 12, characterized in that, The energy storage and charging station system further includes a third power supply module connected to the DC bus. The third power supply module is configured to acquire a first energy source and convert the first energy source into electrical energy, which is then transmitted to the DC bus. The first energy source includes either solar energy or wind energy. The control method further includes: The first DC / DC converter is controlled to be in an operating state so that the electrical energy converted by the third power supply module is delivered to the charging assembly via the DC bus and the first DC / DC converter; Alternatively, the second power supply module can be connected to the DC bus and disconnected from the charging assembly, so that the electrical energy converted by the third power supply module can be delivered to the energy storage battery via the DC bus and the second DC / DC converter.

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