Storage and charging integrated device, charging control method, charging pile and charging system

Abstract

The invention discloses a storage and charging integrated device, a charging control method, a charging pile and a charging system.The storage and charging integrated device comprises an energy storage module and a charging module, the first input end of the charging module is connected with the first output end of an alternating current-direct current conversion module, and the first end of the energy storage module is connected with the second output end of the alternating current-direct current conversion module; the second end of the energy storage module is connected with the second input end of the charging module. The input end of the AC-DC conversion module is connected with an AC power grid. And the charging module is configured to perform charging output by serially connecting first charging power provided based on the working state of the AC / DC conversion module and second charging power provided by the energy storage module, and provide third charging power output by the charging module to the to-be-charged equipment for charging. Therefore, high-power output of the storage and charging integrated device can be realized based on low power provided by the alternating-current power grid, so that the cost of the storage and charging integrated device can be reduced, and the charging speed of the storage and charging integrated device is improved.

Description

[0001] Description of the case

[0002] This application is a divisional application based on a patent application with an application date of November 18, 2024, application number 202411642143.2, and invention name “Storage and charging integrated device, charging control method, charging pile and charging system”. Technical Field

[0003] The present application relates to the field of charging technology, and in particular to a storage-charging integrated device, a charging control method, a charging pile and a charging system. Background Art

[0004] As the number of new energy vehicles increases, the requirements for charging facilities are getting higher and higher. The integrated storage and charging device integrates energy storage and charging functions, which can adjust the power load and increase long-term benefits. At present, the integrated storage and charging device has been widely used in charging stations for new energy vehicles.

[0005] However, with the popularization of fast-charging / super-charging electric vehicles, the current fast-charging / super-charging charging piles are less used, and the fast-charging / super-charging charging piles in related technologies require additional transformers or transformer capacity expansion, which not only increases costs but is also not conducive to the fast charging of electric vehicles. Summary of the invention

[0006] The present application mainly provides a storage-charging integrated device, a charging control method, a charging pile and a charging system. Without the need for an additional transformer, the small power provided by the AC power grid can achieve high-power output of the storage-charging integrated device, thereby reducing the cost of the storage-charging integrated device and improving the charging speed of the storage-charging integrated device.

[0007] The technical solution of this application is implemented as follows:

[0008] In a first aspect, an embodiment of the present application provides a storage-charging integrated device, the storage-charging integrated device comprising an energy storage module and a charging module, wherein:

[0009] The first input terminal of the charging module is connected to the first output terminal of the AC / DC conversion module, the first terminal of the energy storage module is connected to the second output terminal of the AC / DC conversion module, the second terminal of the energy storage module is connected to the second input terminal of the charging module, and the input terminal of the AC / DC conversion module is connected to the AC power grid; the working state of the AC / DC conversion module includes a positive polarity working state and a reverse polarity working state, and the AC / DC conversion module is configured to provide a first charging power based on the working state;

[0010] The charging module is configured to perform charging output based on the first charging power and the second charging power provided by the energy storage module in series, and provide the third charging power output by the charging module to the device to be charged for charging; wherein the third charging power is greater than the first charging power.

[0011] Through the above-mentioned technical means, the first charging power provided by the AC / DC conversion module and the second charging power provided by the energy storage module are connected in series to the charging module for charging output, so that the charging module provides the third charging power to the device to be charged for charging. In this way, since the energy storage module can output a higher second charging power, the storage-charging integrated device can output a third charging power that meets the supercharging / fast charging requirements based on the lower power provided by the AC power grid. Therefore, there is no need to configure an additional transformer in the circuit, which reduces the cost of the storage-charging integrated device and reduces the volume of the storage-charging integrated device. Moreover, without being restricted by the transformer access point, the storage-charging integrated device can be connected to any position of the AC power grid, which improves the flexibility of the storage-charging integrated device and is conducive to the rapid charging of electric vehicles. In addition, the AC / DC conversion module has different working states and can provide the first charging power in different directions based on the working state, thereby expanding the range of the third charging power output by the charging module and improving the flexibility of charging.

[0012] In some embodiments, the positive terminal of the energy storage module is connected to the negative terminal of the AC-DC conversion module, the negative terminal of the energy storage module is connected to the negative terminal of the charging module, and the positive terminal of the charging module is connected to the positive terminal of the AC-DC conversion module; or, the negative terminal of the energy storage module is connected to the positive terminal of the AC-DC conversion module, the positive terminal of the energy storage module is connected to the positive terminal of the charging module, and the negative terminal of the charging module is connected to the negative terminal of the AC-DC conversion module.

[0013] Through the above technical means, the energy storage module can be arranged on the positive side of the AC / DC conversion module, or on the negative side of the AC / DC conversion module. In this way, the flexibility of module arrangement in the storage-charging integrated device can be improved.

[0014] In some embodiments, the integrated storage and charging device also includes an AC / DC conversion module; wherein: the AC / DC conversion module is configured to provide a first charging power to the charging module and the energy storage module.

[0015] Through the above technical means, the AC-DC conversion module can also be set inside the integrated storage and charging device, so that the integrated storage and charging device can be directly connected to the AC power grid for charging, thereby improving the convenience of charging.

[0016] In some embodiments, the integrated storage and charging device also includes a first switch module; the first switch module includes a first switch and a second switch, the first switch is connected in series between the first output end of the AC / DC conversion module and the first input end of the charging module, and the second switch is connected in series between the second end of the energy storage module and the second input end of the charging module.

[0017] Through the above technical means, by controlling the on or off of the first switch and the second switch, the energy storage module and the AC / DC conversion module are controlled to charge the charging module. In this way, the on and off of the charging circuit can be controlled according to the situation, thereby reducing the power consumption of the storage-charging integrated device.

[0018] In some embodiments, the first switch module also includes a third switch, a fourth switch and a fifth switch; one end of the third switch is respectively connected to the second output end of the AC / DC conversion module and one end of the fifth switch, the other end of the third switch is connected to the first end of the energy storage module, one end of the fourth switch is connected to the second end of the energy storage module, the other end of the fourth switch is respectively connected to the other end of the fifth switch and one end of the second switch, and the other end of the second switch is connected to the second input end of the charging module.

[0019] Through the above technical means, by controlling the on or off of multiple switches in the first switch module, the AC / DC conversion module can charge the device to be charged alone, or the AC / DC conversion module and the energy storage module can be connected in series to charge the device to be charged together, or the device to be charged can be controlled to feed back electric energy to the AC power grid to realize the vehicle-to-grid (V2G) function. In this way, the charging mode or discharge mode of the device to be charged can be switched according to different application scenarios, which improves the energy utilization efficiency and the intelligence of the storage and charging device.

[0020] In some embodiments, the integrated storage and charging device also includes a second switch module, and the second switch module includes a sixth switch; one end of the sixth switch is connected to the first output end of the AC / DC conversion module, and the other end of the sixth switch is respectively connected to the first end of the energy storage module and one end of the third switch.

[0021] Through the above technical means, based on the on or off of each switch in the first switch module and the second switch module, the integrated storage and charging device is controlled to achieve different charging or discharging functions. In this way, the charging state and discharging state of the energy storage module can be controlled according to demand, thereby improving the energy utilization and management efficiency of the integrated storage and charging device.

[0022] In some embodiments, the integrated storage and charging device also includes a second switch module; the second switch module includes a seventh switch and an eighth switch, the seventh switch is connected in series between the first output end of the AC / DC conversion module and the first end of the energy storage module, and the eighth switch is connected in series between the second output end of the AC / DC conversion module and the second end of the energy storage module.

[0023] Through the above technical means, the charging or discharging of the energy storage module is controlled by controlling the conduction and disconnection of the seventh switch and the eighth switch. In this way, the charging and discharging state of the energy storage module can be controlled according to demand, thereby improving the energy utilization and management efficiency of the storage-charging integrated device.

[0024] In some embodiments, the energy storage module includes at least one energy storage unit, wherein: the at least one energy storage unit is connected in series and / or in parallel between a first end of the energy storage module and a second end of the energy storage module to provide a second charging power.

[0025] Through the above-mentioned technical means, the energy storage module includes a plurality of energy storage units connected in series and / or in parallel. Thus, due to the modularity of the energy storage units, the energy storage units can be freely increased or decreased, which facilitates the rapid connection and removal of the energy storage units and improves the charging flexibility of the integrated storage and charging device.

[0026] In some embodiments, each energy storage unit includes an energy storage battery, and each energy storage unit is configured to provide a fourth charging power based on the electrical energy of the energy storage battery; wherein the fourth charging power is less than or equal to the second charging power.

[0027] Through the above technical means, each energy storage unit includes at least one energy storage battery, so that the output power of the integrated storage and charging device can be controlled to meet different charging needs.

[0028] In some embodiments, at least some of the at least one energy storage unit include a third switch module, and the third switch module is connected in series between the first end of the corresponding energy storage unit and the second output end of the AC / DC conversion module.

[0029] By means of the above technical means, the number of energy storage units connected in series with the AC / DC conversion module is controlled based on the control of the switch state of the third switch module. In this way, the number of energy storage units connected can be flexibly selected according to the charging power requirements of the device to be charged, thereby improving the flexibility of charging.

[0030] In some embodiments, the integrated storage and charging device also includes a control module; wherein: the control module is connected to the first switch module, the second switch module and the third switch module, and is configured to send a drive signal to the first switch module, the second switch module and the third switch module; wherein the drive signal is used to control the on and off states of the first switch module, the second switch module and the third switch module.

[0031] Through the above technical means, the control module controls the on or off of each switch to enable the storage-charging device to achieve different functions, thereby improving the convenience and safety of the control of the storage-charging device.

[0032] In some embodiments, the integrated storage and charging device also includes a communication module; the communication module is connected to the control module; wherein: the control module is configured to obtain the status parameters of the integrated storage and charging device, and send the status parameters of the integrated storage and charging device to the communication module; the communication module is configured to receive the status parameters of the integrated storage and charging device, and forward them to the cloud platform.

[0033] Through the above technical means, the communication module feeds back the state parameters collected by the control module to the cloud platform. In this way, the operation data of the storage-charging device can be saved in time, and the operation status of the storage-charging device can be mastered, thereby improving the operation reliability of the storage-charging device.

[0034] In some embodiments, the AC-DC conversion module is a bidirectional ACDC module.

[0035] Through the above technical means, the AC / DC conversion module is a bidirectional ACDC module. In this way, bidirectional power exchange between the storage and charging device and the AC power grid is realized. The storage and charging device can not only charge the equipment to be charged, but also feed back power to the power grid, which helps to reduce the peak load of the power grid and improve the stability and energy utilization of the power grid.

[0036] In some embodiments, the ratio between the rated energy and the rated power of the energy storage module is less than or equal to a first preset value; the ratio between the input power and the output power of the integrated storage and charging device is less than or equal to a second preset value; wherein the first preset value is greater than the second preset value.

[0037] Through the above-mentioned technical means, by limiting the ratio between the rated energy and the rated power of the energy storage module, and the ratio between the input power and the output power of the storage-charging integrated device, it is possible to achieve high cost performance and better performance under the condition of small power input and high power output.

[0038] In some embodiments, the first charging power is less than or equal to 150 kilowatts, and the third charging power is greater than or equal to 360 kilowatts.

[0039] Through the above-mentioned technical means, the first charging power and the third charging power are limited, so that the integrated storage and charging device can realize the functions of small power input and high power output without the need for an additional transformer, thereby realizing supercharging of the equipment to be charged by the integrated storage and charging device.

[0040] In a second aspect, an embodiment of the present application provides a charging control method, which is applied to a storage-charging integrated device, the storage-charging integrated device including an energy storage module and a charging module, the method comprising:

[0041] The power provided by the AC power grid is converted into DC through the AC / DC conversion module, a first charging power is output based on the working state of the AC / DC conversion module, and a second charging power is output through the energy storage module, wherein the working state of the AC / DC conversion module includes a positive polarity working state and a reverse polarity working state;

[0042] The first charging power and the second charging power are connected in series and provided to the charging module for charging output, and the third charging power output by the charging module is provided to the device to be charged for charging; wherein the third charging power is greater than the first charging power.

[0043] Through the above-mentioned technical means, the first charging power provided by the AC / DC conversion module and the second charging power provided by the energy storage module are jointly output to the charging module for charging, so that the charging module provides the third charging power to the device to be charged for charging. In this way, since the energy storage module can output a higher second charging power, the storage-charging integrated device can output a third charging power that meets the supercharging / fast charging requirements based on the lower power provided by the AC power grid. Therefore, there is no need to configure an additional transformer in the circuit, which reduces the cost of the storage-charging integrated device and reduces the size of the storage-charging integrated device. Moreover, the storage-charging integrated device can be connected to any location of the AC power grid without being restricted by the transformer access point, which improves the flexibility of the storage-charging integrated device and is conducive to the rapid charging of electric vehicles.

[0044] In some embodiments, the integrated storage and charging device also includes a first switch module, the first switch module includes a first switch and a second switch; the method also includes: when the first switch and the second switch are both in an on state, the charging module is able to charge the device to be charged based on the first charging power provided by the AC / DC conversion module and the second charging power provided by the energy storage module.

[0045] Through the above technical means, by controlling the on or off of the first switch and the second switch, the energy storage module and the AC / DC conversion module are controlled to charge the charging module. In this way, the on and off of the charging circuit can be controlled according to the situation, thereby reducing the power consumption of the storage-charging integrated device.

[0046] In some embodiments, the integrated storage and charging device also includes a first switch module, and the first switch module includes a first switch, a second switch, a third switch, a fourth switch and a fifth switch; the method also includes: when the first switch, the second switch, the third switch and the fourth switch are all in an on state and the fifth switch is in an off state, the charging module is enabled to charge the device to be charged based on the first charging power provided by the AC / DC conversion module and the second charging power provided by the energy storage module; or, it is also configured that when the first switch, the second switch and the fifth switch are all in an on state and the third switch and the fourth switch are in an off state, the charging module is enabled to charge the device to be charged based on the first charging power provided by the AC / DC conversion module, or to feed back electric energy to the AC power grid based on the output power of the device to be charged.

[0047] Through the above technical means, by controlling the on or off of multiple switches in the first switch module, the AC / DC conversion module can charge the device to be charged alone, or the AC / DC conversion module and the energy storage module can be connected in series to charge the device to be charged together, or the device to be charged can be controlled to feed back electric energy to the AC power grid to realize the vehicle-to-grid (V2G) function. In this way, the charging mode or discharge mode of the device to be charged can be switched according to different application scenarios, which improves the energy utilization efficiency and the intelligence of the storage and charging device.

[0048] In some embodiments, the integrated storage and charging device also includes a second switch module, and the second switch module includes a sixth switch; the method also includes: when the fourth switch, the fifth switch and the sixth switch are all in the on state, the energy storage module is charged based on the first charging power provided by the AC / DC conversion module, or electric energy is fed back to the AC power grid based on the output power of the energy storage module.

[0049] Through the above technical means, based on the on or off of each switch in the second switch module, the integrated storage and charging device is controlled to achieve different charging or discharging functions. In this way, the charging and discharging state of the energy storage module can be controlled according to demand, thereby improving the energy utilization and management efficiency of the integrated storage and charging device.

[0050] In some embodiments, the integrated storage and charging device also includes a second switch module, and the second switch module includes a seventh switch and an eighth switch; the method also includes: when the seventh switch and the eighth switch are both in the on state, charging the energy storage module based on the first charging power provided by the AC / DC conversion module; or feeding back electric energy to the AC power grid based on the output power of the energy storage module.

[0051] Through the above technical means, the charging or discharging of the energy storage module is controlled by controlling the conduction and disconnection of the seventh switch and the eighth switch. In this way, the charging and discharging state of the energy storage module can be controlled according to demand, thereby improving the energy utilization and management efficiency of the storage-charging integrated device.

[0052] In some embodiments, the energy storage module includes at least one energy storage unit, and at least part of the at least one energy storage unit includes a third switch module; the method also includes: when the third switch module is in an on state, the third switch module connects at least one energy storage unit in series in the charging circuit where the third switch is located to provide a second charging power.

[0053] By means of the above technical means, the number of energy storage units connected in series with the AC / DC conversion module is controlled based on the control of the switch state of the third switch module. In this way, the number of energy storage units connected can be flexibly selected according to the charging power requirements of the device to be charged, thereby improving the flexibility of charging.

[0054] In a third aspect, an embodiment of the present application provides a charging pile, which includes a storage-charging integrated device as described in any one of the first aspects.

[0055] Through the above technical means, the storage-charging device in the charging pile can output a higher third charging power that meets the supercharging / fast charging requirements based on the lower power provided by the AC power grid. Therefore, no additional transformer is required in the circuit, which reduces the cost of the storage-charging device and reduces the size of the storage-charging device. Moreover, the storage-charging device can be connected to any position of the AC power grid without being restricted by the transformer access point, which improves the flexibility of the charging pile and is conducive to the fast charging of the equipment to be charged.

[0056] In a fourth aspect, an embodiment of the present application provides a charging system, the charging system comprising a device to be charged and a charging pile as described in the third aspect.

[0057] Through the above-mentioned technical means, without the need for additional transformer configuration, the charging piles in the charging system can achieve high-power output to the charged equipment based on the small-power input of the AC power grid, which not only reduces the cost and volume of the charging system, but also improves the charging speed.

[0058] In some embodiments, the charging module includes a charging gun, and the output end of the charging gun is connected to the device to be charged; wherein: the integrated storage and charging device is used to charge the device to be charged through the charging gun according to the first charging power provided by the AC / DC conversion module and the second charging power provided by the energy storage module; wherein the third charging power is greater than the first charging power.

[0059] Through the above technical means, the device to be charged is charged through the charging gun, which improves the stability of the charging process.

[0060] In some embodiments, the charging system also includes a cloud platform, which is connected to the integrated storage and charging device; wherein: the cloud platform is configured to receive status parameters of the integrated storage and charging device.

[0061] Through the above-mentioned technical means, the status parameters of the storage-charging integrated device are received through the cloud platform, which facilitates real-time monitoring of the status of the storage-charging integrated device and enables timely handling of abnormalities when they occur.

[0062] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and are not intended to limit the technical solutions of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 1 ;

[0064] Figure 2 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 2 ;

[0065] Figure 3 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 3 ;

[0066] Figure 4 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 4 ;

[0067] Figure 5 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 5 ;

[0068] Figure 6 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 6 ;

[0069] Figure 7 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 7 ;

[0070] Figure 8 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 8 ;

[0071] Fig. 9 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 9 ;

[0072] Fig.10 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 10 ;

[0073] Fig.11 A schematic diagram of the composition structure of an energy storage unit provided in an embodiment of the present application;

[0074] Fig.12 A schematic diagram of a charging control method provided in an embodiment of the present application;

[0075] Fig.13 A schematic diagram of the structure of a charging pile provided in an embodiment of the present application;

[0076] Fig.14 A schematic diagram of the structure of a charging system provided in an embodiment of the present application Figure 1 ;

[0077] Fig.15 A schematic diagram of the structure of a charging system provided in an embodiment of the present application Figure 2 ;

[0078] Fig.16 A schematic diagram of the structure of a charging system provided in an embodiment of the present application Figure 3 . DETAILED DESCRIPTION

[0079] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present application.

[0080] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0081] In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0082] It should also be pointed out that the terms "first\second\third" involved in the embodiments of the present application are only used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0083] In addition, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0084] The following is an introduction to the related technologies of this application.

[0085] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in areas such as energy storage.

[0086] At present, new energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0087] In the embodiments of the present application, the battery may be a battery cell. A battery cell refers to a basic unit that can realize the mutual conversion between chemical energy and electrical energy, and can be used to make a battery module or a battery pack, so as to supply power to an electrical device. A battery cell may be a secondary battery, which refers to a battery cell that can be continuously used by activating the active material by charging after the battery cell is discharged. The battery cell may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present disclosure are not limited to this.

[0088] In the embodiment of the present application, the battery may also be a single physical module including one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in hybrid connection through a busbar component.

[0089] In order to adjust the power load and increase long-term benefits, the integrated storage and charging device is used more and more frequently in charging stations, parking lots and other places. Among them, "storage" refers to the intelligent battery module that stores electricity, and "charging" refers to charging new energy vehicles. Therefore, the integrated storage and charging device can supply power to the grid or vehicles from the battery module when the power grid is at its peak; when the power grid is at its low point, the grid charges the battery module and the vehicle, thus playing the role of peak shaving and valley filling.

[0090] At present, new energy vehicles have multiple charging modes including slow charging, fast charging and super charging. Among them, the charging power of slow charging is usually between 3 and 7 kW, and it takes 8 to 10 hours to fully charge the battery in a new energy vehicle; while the charging power of fast charging and super charging is generally higher, reaching tens to hundreds of kW, which can provide a large amount of electricity for new energy vehicles in a shorter time.

[0091] Although supercharging / fast charging can shorten the charging time of new energy vehicles, supercharging has high requirements for battery design, charging design, power grid and infrastructure. For example, fast charging / supercharging charging piles require additional transformers or transformer expansion, which not only increases costs but also has a larger volume. Moreover, such transformers need to be applied in advance, so the charging access point is relatively fixed, which is not conducive to the fast charging of electric vehicles.

[0092] Based on this, the embodiments of the present application provide a storage-charging integrated device, a charging control method, a charging pile and a charging system, wherein the first charging power provided by the AC-DC conversion module and the second charging power provided by the energy storage module are jointly output to the charging module for charging, so that the charging module provides a third charging power to the device to be charged for charging. In this way, since the energy storage module can output a higher second charging power, the storage-charging integrated device can enable the charging module to output a larger third charging power that meets the requirements of supercharging / fast charging based on the small power provided by the AC power grid, so there is no need to configure an additional transformer in the circuit, which reduces the cost of the storage-charging integrated device and reduces the size of the storage-charging integrated device. Moreover, the storage-charging integrated device can be connected to any position of the AC power grid without being restricted by the transformer access point, which improves the flexibility of the storage-charging integrated device and is conducive to the rapid charging of electric vehicles.

[0093] The present application is further described in detail below through the accompanying drawings and specific embodiments.

[0094] In one embodiment of the present application, Figure 1 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 1 .like Figure 1 As shown, the integrated storage and charging device 10 includes an energy storage module 101 and a charging module 103, wherein:

[0095] The first input terminal P5 of the charging module 103 is connected to the first output terminal P2 of the AC-DC conversion module 102, the first terminal P3 of the energy storage module 101 is connected to the second output terminal P1 of the AC-DC conversion module 102, the second terminal P4 of the energy storage module 101 is connected to the second input terminal P6 of the charging module 103, and the input terminal of the AC-DC conversion module 102 is connected to the AC power grid 201; the working state of the AC-DC conversion module 102 includes a positive polarity working state and a reverse polarity working state, and the AC-DC conversion module 102 is configured to provide a first charging power based on the working state;

[0096] The charging module 103 is configured to perform charging output based on the first charging power and the second charging power provided by the energy storage module 101 in series, and provide the third charging power output by the charging module 103 to the device to be charged 202 for charging; wherein the third charging power is greater than the first charging power.

[0097] It should be noted that in the embodiment of the present application, the first output terminal P1 of the AC-DC conversion module 102, the second output terminal P2 of the AC-DC conversion module 102, the first terminal P3 of the energy storage module 101, the second terminal P4 of the energy storage module 101, the first input terminal P5 of the charging module 103 and the second input terminal P6 of the charging module 103 can be respectively determined as the positive terminal or the negative terminal according to the specific structure, so as to realize that the energy storage module 101 and the AC power grid 201 jointly supply power to the device to be charged 202.

[0098] In the embodiment of the present application, the energy storage module 101 can be a storage battery capable of storing electrical energy in the storage-charging integrated device 10, such as a lithium iron phosphate battery, a lithium ion battery, etc. The energy storage module 101 can store electrical energy output or converted from the AC power grid 201, or renewable energy, such as photovoltaic power generation equipment. The battery capacity and type of the energy storage module 101 are not limited here, but in general, the output power U2 of the energy storage module 101, that is, the second charging power, is generally greater than 210kW.

[0099] It should be noted that the AC power grid 201 may be a three-phase AC power grid, and its input power is generally less than or equal to 150 kW. In the embodiment of the present application, the AC power grid 201 is connected to the AC / DC conversion module 102, and can output AC voltage and AC current to the AC / DC conversion module 102. Those skilled in the art can understand that the AC power grid 201 generally refers to a system that can provide power. As an example, the AC power grid 201 may be a power source for municipal power.

[0100] In an embodiment of the present application, the AC / DC conversion module 102 can be arranged outside the storage-charging device 10, and is an isolated bidirectional AC / DC (Alternating current / Direct current, AC / DC) converter, or a rectifier, which is a power conversion device that can convert AC power into DC power, or convert DC power into AC power. Among them, an isolation chip can also be provided in the AC / DC conversion module 102 to isolate the AC power grid 201 from the subsequent charging module 103, the device to be charged 202, etc., to prevent the AC power grid 201 from damaging the storage-charging device 10 and the device to be charged 202. It should be understood that after the input power of the AC power grid 201 is converted by the AC / DC conversion module 102, its output power, that is, the first charging power, should be less than or equal to 150kW.

[0101] In addition, in the embodiment of the present application, the AC / DC conversion module 102 has different working states, illustratively, it can include a positive polarity working state and a reverse polarity working state, wherein the positive polarity working state can refer to the AC / DC conversion module 102 outputting the first charging power in the direction of the charging module 103, which is called "forward flow" in this case, so the output first charging power is positive polarity, and the sum of the first charging power and the second charging power output by the energy storage module 101 is charged and output to the charging module 103, and the obtained third charging power is the sum of the first charging power and the second charging power; the reverse polarity working state can refer to the AC / DC conversion module 102 outputting the first charging power in the direction of the energy storage module 101, which is called "reverse flow" in this case, so the output first charging power is reverse polarity (or called "negative polarity"), at this time, the first charging power partially offsets the second charging power output by the energy storage module 101 and then charges and outputs to the charging module 103, and the obtained third charging power is the difference between the second charging power and the first charging power.

[0102] It should also be noted that the power requirement for fast charging / super charging is generally greater than or equal to 360 kW. The output power U3 of the charging module 103, that is, the third charging power, needs to be greater than or equal to 360 kW, which is jointly provided by the first charging power output by the AC / DC conversion module 102 and the second charging power output by the energy storage module 101.

[0103] The positive output terminal of the AC / DC conversion module 102 is connected to the positive input terminal of the charging module 103, the negative output terminal of the AC / DC conversion module 102 is connected to the positive terminal of the energy storage module 101, and the negative terminal of the energy storage module 101 is connected to the negative input terminal of the charging module 103. In this way, the energy storage module 101 can be connected in series in the charging circuit, that is, the AC / DC conversion module 102 is connected in series with the energy storage module 101, and the energy storage module 101 and the AC power grid 201 jointly provide charging power for the charging module 103, that is, the sum of the first charging power and the second charging power is provided to the charging module 103, and finally the charging module 103 outputs the third charging power to the device to be charged 202. Since the first charging power can output positive charging power or negative charging power based on different working states, the third charging power output by the charging module 103 at this time is different.

[0104] It should also be noted that when the AC / DC conversion module 102 is in a positive polarity working state, since the energy storage module 101 outputs the second charging power to the charging module 103, the third charging power is greater than the first charging power provided by the AC / DC conversion module 102, and the embodiment of the present application does not require the input power of the AC power grid 201, and there is no need to set up an additional transformer to boost the input power of the AC power grid 201. It should be understood that the second charging power output by the energy storage module 101 can be adaptively adjusted based on the input power provided by the AC power grid 201, that is, the difference between the first charging power provided by the AC / DC conversion module 102 and the charging power requirement of the supercharge, so that the charging module 103 charges the device to be charged 202 in a fast charging / supercharging charging mode. Alternatively, when the third charging power is greater than the second charging power, the AC / DC conversion module 102 is in a reverse polarity working state, and the second charging power is adjusted according to the negative charging power output by the AC / DC conversion module to reduce the charging power output to the device to be charged 202.

[0105] The embodiment of the present application provides an integrated storage and charging device, in which the first charging power provided by the AC / DC conversion module and the second charging power provided by the energy storage module are connected in series to the charging module for charging output, so that the charging module provides a third charging power to the device to be charged for charging. In this way, since the energy storage module can output a higher second charging power, the integrated storage and charging device can enable the charging module to output a third charging power that meets the supercharging / fast charging requirements based on the lower power provided by the AC power grid. Therefore, there is no need to configure an additional transformer in the circuit, which reduces the cost of the integrated storage and charging device and reduces the volume of the integrated storage and charging device. Moreover, the integrated storage and charging device can be connected to any position of the AC power grid without being restricted by the transformer access point, which improves the flexibility of the integrated storage and charging device and facilitates the rapid charging of electric vehicles. In addition, the AC / DC conversion module has different working states and can provide the first charging power in different directions based on the working state, thereby expanding the range of the third charging power output by the charging module and improving the flexibility of charging.

[0106] In another embodiment of the present application, Figure 2 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 2 .like Figure 2 As shown, the positive terminal of the energy storage module 101 is connected to the negative terminal of the AC / DC conversion module 102 , the negative terminal of the energy storage module 101 is connected to the negative terminal of the charging module 103 , and the positive terminal of the charging module 103 is connected to the positive terminal of the AC / DC conversion module 102 .

[0107] That is to say, the first output terminal P1 of the AC / DC conversion module 102 can be a positive output terminal, the second output terminal P2 of the AC / DC conversion module 102 can be a negative output terminal, the first terminal P3 of the energy storage module 101 can be a positive terminal, the second terminal P4 of the energy storage module 101 can be a negative terminal, the first input terminal P5 of the charging module 103 can be a positive input terminal, and the second input terminal P6 of the charging module 103 can be a negative input terminal.

[0108] Or, in some embodiments, Figure 3 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 3 .like Figure 3 As shown, the negative terminal of the energy storage module 101 is connected to the positive terminal of the AC / DC conversion module 102 , the positive terminal of the energy storage module 101 is connected to the positive terminal of the charging module 103 , and the negative terminal of the charging module 103 is connected to the negative terminal of the AC / DC conversion module 102 .

[0109] The first output terminal P1 of the AC / DC conversion module 102 may be a negative output terminal, the second output terminal P2 of the AC / DC conversion module 102 may be a positive output terminal, the first terminal P3 of the energy storage module 101 may be a negative terminal, the second terminal P4 of the energy storage module 101 may be a positive terminal, the first input terminal P5 of the charging module 103 may be a negative input terminal, and the second input terminal P6 of the charging module 103 may be a positive input terminal.

[0110] It should be understood that whether each terminal in each module is a positive terminal or a negative terminal is determined according to the device conditions, but Figure 2 , Figure 3 In the embodiment, the energy storage module 101 is connected in series with the AC / DC conversion module 102, and the sum of the output powers of the two is provided to the charging module 103 as the third charging power. Figure 2 The illustrated embodiment is described.

[0111] The embodiment of the present application provides a storage-charging integrated device, in which the energy storage module can be arranged on the positive side of the AC-DC conversion module or on the negative side of the AC-DC conversion module. In this way, the flexibility of module arrangement in the storage-charging integrated device can be improved.

[0112] In some embodiments, Figure 4 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 4 .like Figure 4 As shown, the integrated storage and charging device also includes an AC / DC conversion module; wherein: the AC / DC conversion module is configured to provide a first charging power to the charging module and the energy storage module.

[0113] In an embodiment of the present application, the AC / DC conversion module 102 can also be arranged inside the storage-charging device 10. Although this solution increases the volume of the storage-charging device 10 to a certain extent, the requirements for the charging interface between the AC power grid 201 are reduced, thereby making charging more convenient.

[0114] An embodiment of the present application provides an integrated storage and charging device, and an AC / DC conversion module can also be arranged inside the integrated storage and charging device, so that the integrated storage and charging device can be directly connected to the AC power grid for charging, thereby improving the convenience of charging.

[0115] In another embodiment of the present application, Figure 5 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 5 .like Figure 5As shown, the integrated storage and charging device 10 also includes a first switch module 104; the first switch module 104 includes a first switch K1 and a second switch K2, the first switch K1 is connected in series between the first output end of the AC / DC conversion module 102 and the first input end of the charging module 103, and the second switch K2 is connected in series between the second end of the energy storage module 101 and the second input end of the charging module 103.

[0116] In an embodiment of the present application, the first switch module 104 is configured to enable the charging module 103 to charge the device to be charged 202 based on the first charging power provided by the AC / DC conversion module 102 and the second charging power provided by the energy storage module 101 when both the first switch K1 and the second switch K2 are in an on state.

[0117] It should be noted that Figure 5 is based on Figure 2 The embodiment shown in the figure is used as an example for explanation. It should be understood that the first switch module 104 can also be based on Figure 3 The embodiment shown in the figure is configured, the first switch K1 is connected in series between the negative terminal of the AC / DC conversion module 102 and the negative input terminal of the charging module 103, and the second switch K2 is connected in series between the positive terminal of the energy storage module 101 and the positive input terminal of the charging module 103. Figure 5 The first switch module 104 shown corresponds to the first switch module 104 and is not shown here.

[0118] In the embodiment of the present application, the first switch K1 and the second switch K2 included in the first switch module 104, as well as the switches included in the following embodiments, can all be electronic components that are turned on or off based on a driving signal, thereby controlling the circuit in the storage-charge integrated device 10 to open or disconnect. For example, it can be a knife switch, or a semiconductor device such as a switch tube, a triode, a transistor, an IGBT, a metal-oxide-semiconductor field-effect transistor (MOSFET or MOS tube), and no limitation is made here.

[0119] It should be noted that if Figure 5 As shown, the first switch K1 is connected in series between the positive terminal of the AC / DC conversion module 102 and the positive input terminal of the charging module 103, and is used to control the on-off of the circuit between the AC / DC conversion module 102 and the charging module 103; the second switch K2 is connected in series between the negative terminal of the energy storage module 101 and the negative input terminal of the charging module 103, and is used to control the on-off of the circuit between the energy storage module 101 and the charging module 103. It should be understood that in order to avoid power supply abnormalities, the first switch K1 and the second switch K2 should be in the same state and turned on or off at the same time.

[0120] It should also be noted that when the first switch K1 and the second switch K2 are both in the on state, the loop composed of the AC / DC conversion module 102, the energy storage module 101 and the charging module 103 is turned on, and the energy storage module 101 and the AC / DC conversion module 102 jointly provide charging power to the charging module 103, and jointly charge the device to be charged 202; when the first switch K1 and the second switch K2 are both in the off state, the AC / DC conversion module 102 and the energy storage module 101 stop providing charging power to the charging module 103, and stop charging the device to be charged 202.

[0121] The embodiment of the present application provides a storage-charging integrated device, which controls whether the energy storage module and the AC-DC conversion module charge the charging module by controlling the on or off of the first switch and the second switch. In this way, the on and off of the charging circuit can be controlled according to the situation, thereby reducing the power consumption of the storage-charging integrated device.

[0122] In some embodiments, Figure 6 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 6 .like Figure 6 As shown, the first switch module 104 also includes a third switch K3, a fourth switch K4 and a fifth switch K5; one end of the third switch K3 is respectively connected to the second output end of the AC / DC conversion module 102 and one end of the fifth switch K5, the other end of the third switch K3 is connected to the first end of the energy storage module 101, one end of the fourth switch K4 is connected to the second end of the energy storage module 101, the other end of the fourth switch K4 is respectively connected to the other end of the fifth switch K5 and one end of the second switch K2, and the other end of the second switch K2 is connected to the second input end of the charging module 103.

[0123] In the embodiment of the present application, the first switch module 104 is configured to enable the charging module 103 to charge the device to be charged 202 based on the first charging power provided by the AC-DC conversion module 102 and the second charging power provided by the energy storage module 101 when the first switch K1, the second switch K2, the third switch K3 and the fourth switch K4 are all in the on state and the fifth switch K5 is in the off state; or, it is also configured to enable the charging module 103 to charge the device to be charged 202 based on the first charging power provided by the AC-DC conversion module 102, or to feed back electric energy to the AC power grid 201 based on the output power of the device to be charged 202 when the first switch K1, the second switch K2 and the fifth switch K5 are all in the on state and the third switch K3 and the fourth switch K4 are in the off state.

[0124] It should be noted that Figure 6 The first switch module 104 is shown in Figure 2 It should be understood that the first switch module 104 in the embodiment of the present application can also be based on Figure 3 The storage and charging integrated device 10 shown in the figure is arranged, and the positive or negative electrode represented by each end is shown in FIG. Figure 3 , the connection method refers to this embodiment.

[0125] It should be noted that, in some embodiments, the first switch module 104 may include a first switch K1, a second switch K2, a third switch K3 and a fourth switch K4, and based on the conduction of the first switch K1 to the fourth switch K4, the energy storage module 101 and the AC-DC conversion module 102 are connected in series to jointly supply power to the charging module 103; and based on the disconnection of the first switch K1 to the fourth switch K4, the power supply to the charging module 103 is stopped.

[0126] It should also be noted that, in the case where the first switch module 104 includes the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5, if the fifth switch K5 is turned off and the remaining switches in the first switch module 104 are closed, the energy storage module 101 is connected in series with the AC / DC conversion module 102 to jointly supply power to the charging module 103; or, if the charging power required by the to-be-charged device 202 is low, or the to-be-charged device 202 does not support or does not use the supercharging function, the first switch K1, the second switch K2 and the fifth switch K5 are controlled to be closed, and the third switch K3 and the fourth switch K5 are connected in series. When K4 is turned off, only the AC-DC conversion module 102 converts the AC power provided by the AC power grid 201, outputs the first charging power, and provides it to the device to be charged 202 through the charging module 103. The energy storage module 101 does not participate in the power supply to the device to be charged 202; alternatively, the first switch K1, the second switch K2 and the fifth switch K5 can be controlled to be closed, and the third switch K3 and the fourth switch K4 can be turned off. Based on the vehicle-to-grid (V2G) technology, the device to be charged 202 transmits energy to the AC power grid 201 to enhance the stability of the AC power grid 201.

[0127] In the embodiment of the present application, the turning on or off of each switch in the first switch module 104 should be completed synchronously or within a preset time range to avoid abnormal charging.

[0128] In the embodiment of the present application, the on or off of each switch in the first switch module 104 and the flow direction of electric energy in the circuit can be controlled based on actual needs, thereby achieving regulation and optimization of electric energy.

[0129] The embodiment of the present application provides a storage-charging integrated device, which controls the on or off of multiple switches in the first switch module to enable the AC-DC conversion module to charge the device to be charged alone, or the AC-DC conversion module and the energy storage module are connected in series to charge the device to be charged together, or the device to be charged can be controlled to feed back electric energy to the AC power grid. In this way, the charging mode or the discharging mode of the device to be charged can be switched according to different application scenarios, thereby improving the energy utilization efficiency and the intelligence of the storage-charging integrated device.

[0130] In some embodiments, Figure 7 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 7 .like Figure 7 As shown, the integrated storage and charging device 10 also includes a second switch module, which includes a sixth switch K6; one end of the sixth switch K6 is connected to the first output end of the AC / DC conversion module 102, and the other end of the sixth switch K6 is respectively connected to the first end of the energy storage module 101 and one end of the third switch K3.

[0131] In the embodiment of the present application, the second switch module is configured to charge the energy storage module 101 based on the first charging power provided by the AC / DC conversion module 102 when the fourth switch K4, the fifth switch K5 and the sixth switch K6 are all in the on state, or to feed back electric energy to the AC power grid 201 based on the output power of the energy storage module 101.

[0132] It should be noted that the embodiments of the present application are based on Figure 6 , Figure 2 The structure of the storage-charging integrated device 10 shown in the figure can also be based on Figure 3 The integrated storage and charging device 10 shown is provided with a second switch module of the embodiment of the present application, and its connection relationship refers to the present embodiment.

[0133] Among them, Figure 7 As shown, referring to the aforementioned embodiment, when the first switch K1, the second switch K2 and the fifth switch K5 are in the on state, and the third switch K3, the fourth switch K4 and the sixth switch K6 are in the off state, the device to be charged 202 can be charged based on the first charging power provided by the AC / DC conversion module 102, or electric energy can be fed back to the AC power grid 201 based on the output power of the device to be charged 202.

[0134] Or, if Figure 7As shown, referring to the above embodiment, when the first switch K1, the second switch K2, the third switch K3 and the fourth switch K4 are in the on state, and the fifth switch K5 and the sixth switch K6 are in the off state, the energy storage module 101 is connected in series with the AC-DC conversion module 102, and the second charging power provided by the energy storage module 101 and the first charging power provided by the AC-DC conversion module 102 are used to charge the device to be charged 202. At this time, the energy storage module 101 is in the discharging state, and the AC-DC conversion module 102 is in the charging state for the entire vehicle.

[0135] Or, if Figure 7 As shown, when the fourth switch K4, the fifth switch K5 and the sixth switch K6 are all in the on state and the first switch K1, the second switch K2 and the third switch K3 are all in the off state, the AC power grid 201 charges the energy storage module 101, or the energy storage device feeds back electric energy to the AC power grid 201.

[0136] The embodiment of the present application provides a storage-charging integrated device, which controls the storage-charging integrated device to realize different charging or discharging functions based on the on or off of each switch in the first switch module and the second switch module. In this way, the charging and discharging state of the energy storage module can be controlled according to demand, thereby improving the energy utilization and management efficiency of the storage-charging integrated device.

[0137] In some embodiments, Figure 8 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 8 .like Figure 8 As shown, the integrated storage and charging device 10 also includes a second switch module 105; the second switch module 105 includes a seventh switch K7 and an eighth switch K8, the seventh switch K7 is connected in series between the first output end of the AC-DC conversion module 102 and the first end of the energy storage module 101, and the eighth switch K8 is connected in series between the second output end of the AC-DC conversion module 102 and the second end of the energy storage module 101.

[0138] In the embodiment of the present application, the second switch module 105 is configured to charge the energy storage module 101 based on the first charging power provided by the AC / DC conversion module 102 when the seventh switch K7 and the eighth switch K8 are both in the on state; or to feed back electric energy to the AC power grid 201 based on the output power of the energy storage module 101.

[0139] It should be noted that the embodiments of the present application are based on Figure 2 The storage-charging integrated device 10 shown in the figure is provided with a first switch module 104 and a second switch module 105. Alternatively, in some embodiments, the storage-charging integrated device 10 may also include only the second switch module 105. Alternatively, in some embodiments, it may also be based on Figure 3The integrated storage and charging device 10 shown is provided with a first switch module 104 and / or a second switch module 105, and the connection relationship of the ends of each module can refer to this embodiment.

[0140] The second switch module 105 may include a seventh switch K7 and an eighth switch K8 for controlling the on-off of the circuit between the energy storage module 101 and the AC / DC conversion module 102 .

[0141] It should be noted that when the seventh switch K7 and the eighth switch K8 are turned on, the AC-DC conversion module 102 can convert the AC power of the AC power grid 201 into DC power, and output the first charging power to the energy storage module 101; or, when the seventh switch K7 and the eighth switch K8 are turned on, the energy storage module 101 can also feed back electric energy to the AC power grid 201 through the AC-DC conversion module 102. Alternatively, when the seventh switch K7 and the eighth switch K8 are both turned off, the energy storage module 101 and the AC-DC conversion module 102 are disconnected.

[0142] In some embodiments, when the storage-charging integrated device 10 includes the first switch module 104 and the second switch module 105, the first switch K1, the second switch K2, the fifth switch K5, the seventh switch K7 and the eighth switch K8 can also be closed, and the third switch K3 and the fourth switch K4 can be turned off, so that the first charging power provided by the AC-DC conversion module 102 can be provided to the energy storage module 101 and the device to be charged 202 for charging. It should be understood that if the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5 are closed, and the seventh switch K7 and the eighth switch K8 are turned off, a short circuit will be caused.

[0143] In some embodiments, Fig. 9 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 9 .like Fig. 9 As shown, the first switch module 104 may also include only the first switch K1, the second switch K2, the third switch K3 and the fourth switch K4. In this case, when the first switch K1, the second switch K2, the third switch K3 and the fourth switch K4 are all closed, the energy storage module 101 and the AC-DC conversion module 102 jointly charge the device to be charged 202.

[0144] The embodiment of the present application provides a storage-charge integrated device, which controls the charging or discharging of the energy storage module by controlling the conduction and disconnection of the seventh switch and the eighth switch. In this way, the charging and discharging state of the energy storage module can be controlled according to demand, thereby improving the energy utilization and management efficiency of the storage-charge integrated device.

[0145] In another embodiment of the present application, Fig.10A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 10 .like Fig.10 As shown, the energy storage module 101 includes at least one energy storage unit, wherein: at least one energy storage unit is connected in series and / or in parallel between a first end of the energy storage module 101 and a second end of the energy storage module 101 to provide a second charging power.

[0146] In the embodiment of the present application, the first end of the energy storage module 101 may be a positive terminal, and the second end of the energy storage module 101 may be a negative terminal; or, the first end of the energy storage module 101 may be a negative terminal, and the second end of the energy storage module 101 may be a positive terminal. In the present application and the following embodiments, the first end of the energy storage module 101 is a positive terminal, and the second end is a negative terminal.

[0147] It should be noted that the energy storage module 101 includes one or more energy storage units, namely energy storage unit 1 1014, energy storage unit 2 1013, ..., energy storage unit n-1 1012 and energy storage unit n 1011 (n is a positive integer), each energy storage unit includes a positive terminal and a negative terminal, and multiple energy storage units are connected in series and / or in parallel to form the energy storage module 101, so that the energy storage module 101 provides a second charging power. As an example, the energy storage unit can be an electric box.

[0148] It should also be noted that the multiple energy storage units in the energy storage module 101 can be connected in parallel, or in series, or partially in series and partially in parallel, that is, connected in series-parallel mode, which is not specifically limited here. In the present application and the following embodiments, multiple energy storage units are connected in series as an example for explanation. In this way, when there are multiple energy storage units, the power of the energy storage module 101 is the sum of the power of multiple energy storage units. In this way, the energy storage module 101 can output a higher power to charge the device to be charged 202, and at the same time, there is no need to add a transformer or expand the transformer on the AC power grid 201 side to meet the high-power charging demand.

[0149] In the embodiment of the present application, the number of energy storage units can be selected and set based on actual needs. When the storage-charging device 10 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 scenario; when the storage-charging device 10 is used in fast charging / super charging scenarios, the energy storage unit can be set to multiple units.

[0150] In the embodiment of the present application, the number of energy storage units in the energy storage module 101 can be set according to actual needs, and the energy storage units can be freely increased or decreased in series or parallel.

[0151] An embodiment of the present application provides an integrated storage and charging device, wherein the energy storage module includes a plurality of energy storage units connected in series and / or in parallel. Thus, due to the modularity of the energy storage units, the energy storage units can be freely increased or decreased, thereby facilitating rapid access and removal of the energy storage units, thereby improving the charging flexibility of the integrated storage and charging device.

[0152] In some embodiments, Fig.11 This is a schematic diagram of the composition structure of an energy storage unit provided in an embodiment of the present application. Fig.11 As shown, each energy storage unit 1015 includes an energy storage battery, and each energy storage unit 1015 is configured to provide a fourth charging power based on the electric energy of the energy storage battery; wherein the fourth charging power is less than or equal to the second charging power.

[0153] In the embodiments of the present application, the energy storage battery may be a single-cell battery, a multi-cell battery, a blade battery, a battery module, etc., and no specific limitation is given here.

[0154] In the embodiment of the present application, the number of energy storage batteries in each energy storage unit may be equal or unequal, and may be set according to specific needs. Each energy storage unit may provide a fourth charging power based on the number of energy storage batteries it contains. It should be understood that the fourth charging powers corresponding to different energy storage units may be the same or different.

[0155] It should be noted that each energy storage unit provides a fourth charging power based on the electric energy of the energy storage battery. Furthermore, multiple energy storage units are connected in series and / or in parallel to provide a second charging power to the device to be charged 202. The number of energy storage units and the number of energy storage batteries in each energy storage unit are set to meet different charging requirements of the device to be charged 202.

[0156] An embodiment of the present application provides an integrated storage and charging device, wherein each energy storage unit includes at least one energy storage battery. In this way, the output power of the integrated storage and charging device can be controlled to meet different charging requirements.

[0157] In some embodiments, see Fig.10 At least part of the at least one energy storage unit includes a third switch module, and the third switch module is connected in series between the first end of the corresponding energy storage unit and the second output end of the AC-DC conversion module 102.

[0158] In the embodiment of the present application, the third switch module is configured to connect in series at least one energy storage unit in the charging circuit where the third switch K3 is located when the third switch module is in the on state, so as to provide a second charging power.

[0159] In an embodiment of the present application, the third switch module includes multiple switches, that is, a switch can be set on the path connecting each energy storage module 101 and the AC-DC conversion module 102 to control the number of energy storage units connected to the charging circuit, thereby controlling the power output to the device to be charged 202.

[0160] When there is only one energy storage unit, if the energy storage unit includes a switch, when the switch and the third switch K3 are turned on, the energy storage unit can be connected in series with the AC / DC conversion module 102 to jointly provide the second charging power for the charging module 103 .

[0161] When there are multiple energy storage units, for example, including energy storage unit 1 1014, energy storage unit 2 1013, ..., energy storage unit n-1 1012 and energy storage unit n 1011, and when energy storage unit 1 1014 includes a corresponding switch Kq1, energy storage unit 2 1013 includes a corresponding switch Kq2, energy storage unit n-1 1012 includes a corresponding switch Kqn-1, and energy storage unit n 1011 includes a corresponding switch Kqn, if switch Kq2 is closed and the remaining energy storage units, that is, the remaining switches in the third switch module are turned off, then energy storage unit 1 1014 and energy storage unit 2 1013 are connected in series with the AC-DC conversion module 102 to jointly provide the second charging power for the charging module 103; or, it should be understood that if switch Kqn is closed and the switches in the remaining energy storage units are turned off, then energy storage units 1 1014 to energy storage units n are connected in series. 1011 are connected in series with the AC / DC conversion module 102 to jointly provide the second charging power for the charging module 103.

[0162] The embodiment of the present application provides a storage-charging integrated device, which controls the number of energy storage units connected in series with the AC-DC conversion module based on the control of the switch state of the third switch module. In this way, the number of connected energy storage units can be flexibly selected according to the charging power requirements of the device to be charged, thereby improving the flexibility of charging.

[0163] In another embodiment of the present application, based on the above embodiment Figure 7 , Figure 8 , Fig. 9 , Fig. 9 and Fig.10 As shown, the storage-charging integrated device 10 further includes a control module 106; wherein:

[0164] The control module 106 is connected to the first switch module 104, the second switch module 105 and the third switch module, and is configured to send a drive signal to the first switch module 104, the second switch module 105 and the third switch module; wherein the drive signal is used to control the on and off states of the first switch module 104, the second switch module 105 and the third switch module.

[0165] In the embodiment of the present application, the control module 106 may also be referred to as the control unit of the storage-charging device 10, which may include a microcontroller unit (MCU), a sensor, a switching circuit and other devices for monitoring, controlling and managing the storage-charging device 10.

[0166] In the embodiment of the present application, the control module 106 can send a drive signal to each switch in the first switch module 104, the second switch module 105 and the third switch module, respectively. It should be understood that each drive signal can have a different level state, and the corresponding switch can be controlled to be turned on or off based on the level state of the drive signal. Exemplarily, when the drive signal is in a high level state, the corresponding switch can be controlled to be turned on, and when the drive signal is in a low level state, the corresponding switch can be controlled to be turned off.

[0167] In an embodiment of the present application, the control module 106 can also be used to detect and monitor the current and voltage conditions of each module in the storage-charging device 10, and to issue timely alarms when abnormalities occur.

[0168] It should also be noted that the control module 106 can also be connected to the interactive interface of the storage and charging device 10, and based on the operations selected by the user in the interactive interface, generate a drive signal to control the opening and closing states of each switch, so as to charge the device to be charged 202 in a charging mode based on user needs, or feed electric energy back to the power grid.

[0169] The embodiment of the present application provides a storage-charging integrated device, in which the control module controls the on or off of each switch so that the storage-charging integrated device can realize different functions, thereby improving the convenience and safety of the control of the storage-charging integrated device.

[0170] In some embodiments, based on the above embodiments Figure 7 , Figure 8 and Fig. 9 and Fig.10 As shown, the storage-charging integrated device 10 further includes a communication module 107; the communication module 107 is connected to the control module 106; wherein:

[0171] The control module 106 is configured to obtain the state parameters of the storage-charging device 10 and send the state parameters of the storage-charging device 10 to the communication module 107;

[0172] The communication module 107 is configured to receive status parameters of the storage-charging device 10 and forward them to the cloud platform.

[0173] In the embodiment of the present application, the communication module 107 may also be referred to as a wireless communication module, which has a communication function and is capable of receiving the status parameters of each module in the storage and charging device 10 collected by the control module 106, such as input current, output current, input voltage, output voltage and other parameters, and transmitting these status parameters to the cloud platform.

[0174] In the embodiment of the present application, the communication module 107 can also receive a control signal from the cloud platform and send it to the control module 106, so that the control module 106 can generate a drive signal based on the control signal to control the opening and closing of each switch. The control signal can be generated based on the user's operation on the interactive interface of the cloud platform. For example, the user can perform batch operations on the storage-charging device 10 by selecting different charging modes or discharging modes to the power grid.

[0175] The embodiment of the present application provides a storage-charging device, in which the communication module feeds back the state parameters collected by the control module to the cloud platform. In this way, the operation data of the storage-charging device can be saved in time, and the operation status of the storage-charging device can also be mastered, thereby improving the operation reliability of the storage-charging device.

[0176] In some embodiments, the AC-DC conversion module is a bidirectional ACDC module.

[0177] It should be noted that the AC / DC conversion module can also be an isolated unidirectional ACDC module or an isolated bidirectional ACDC module, which has an isolation chip inside to isolate the storage and charging device 10 from the grid side. The specific structure of the AC / DC conversion module is not limited here.

[0178] In an embodiment of the present application, when the AC / DC conversion module is a bidirectional ACDC module, not only can the energy storage module and / or the device to be charged 202 be charged, but the electric energy of the energy storage module or the device to be charged 202 can also be fed back to the AC power grid 201.

[0179] It should also be noted that when an external power source provides direct current, the storage-charging device 10 can be charged through the input interface.

[0180] The embodiment of the present application provides a storage-charging device, in which the AC-DC conversion module is a bidirectional ACDC module. In this way, bidirectional power exchange between the storage-charging device and the AC power grid is achieved. The storage-charging device can not only charge the device to be charged, but also feed back power to the power grid, which helps to reduce the peak load of the power grid and fill the valley load, thereby improving the stability and energy utilization of the power grid.

[0181] In some embodiments, the ratio between the rated energy and the rated power of the energy storage module is less than or equal to a first preset value; the ratio between the input power and the output power of the storage and charging device 10 is less than or equal to a second preset value; wherein the first preset value is greater than the second preset value.

[0182] In the embodiment of the present application, exemplarily, the first preset value may be 1:3, and the second preset value may be 1:4.

[0183] It should be noted that the rated energy of the energy storage module may refer to the amount of electricity that the energy storage module can store, that is, the capacity of the energy storage module. The rated power of the energy storage module may refer to the output power of the energy storage module. It should be understood that the rated energy and rated power of the energy storage module are both associated with the number of energy storage units contained in the energy storage module. The ratio between the rated energy and the rated power of the energy storage module is less than or equal to 1:3, that is, it can be 1:4, 1:5, etc., which is determined according to the actual output second charging power demand.

[0184] It should also be noted that the input power of the storage-charging device 10 is the power input from the AC power grid to the storage-charging device 10, and the output power of the storage-charging device 10 is the third charging power provided by the charging module to the device to be charged. The ratio between the input power and the output power of the storage-charging device 10 is less than or equal to 1:4, that is, it can be 1:5, 1:6, etc. For example, when the ratio is 1:4, it means that the output power of the storage-charging device 10 is 4 times the input power. Assuming that the input power of the storage-charging device 10 is 150 kilowatts, its output power can reach 600 kilowatts, of which 450 kilowatts are provided by the energy storage module.

[0185] The embodiment of the present application provides an integrated storage and charging device, which can achieve high cost performance and good performance under the condition of small power input and high power output by limiting the ratio between the rated energy and the rated power of the energy storage module and the ratio between the input power and the output power of the integrated storage and charging device.

[0186] In some embodiments, the first charging power is less than or equal to 150 kilowatts, and the third charging power is greater than or equal to 360 kilowatts.

[0187] The first charging power is the power output by the AC / DC conversion module after converting the AC power grid, and the third charging power is the power provided by the charging module to the device to be charged 202 .

[0188] It should be understood that based on the aforementioned embodiments, by selecting a suitable number of energy storage units, or by controlling the number of energy storage units connected to the charging circuit based on the on and off control of the third switch K3, the output power of the charging module can reach 360 kW, 500 kW, 800 kW and 900 kW, etc., to meet the needs of supercharging / fast charging.

[0189] It should be noted that the second charging power that the energy storage module needs to output can be determined based on the difference between the third charging power that the charging module needs to output and the first charging power output by the AC / DC conversion module of the charging device 202, and then the number of energy storage units and energy storage batteries can be configured so that the charging module outputs the third charging power that meets the requirements. For example, when the required third charging power is 360 kilowatts and the first charging power is 150 kilowatts, the second charging power output by the energy storage module needs to meet 210 kilowatts.

[0190] An embodiment of the present application provides an integrated storage and charging device, which limits a first charging power and a third charging power, so that the integrated storage and charging device can achieve the functions of small power input and high power output without the need for an additional transformer, thereby enabling the integrated storage and charging device to supercharge a device to be charged.

[0191] In another embodiment of the present application, a charging control method is provided, which is applied to the storage-charging integrated device 10 in the aforementioned embodiment, such as Figure 1 As shown, the integrated storage and charging device 10 includes an energy storage module 101 and a charging module 103 .

[0192] like Fig.12 As shown, the method may include:

[0193] S301, performing AC-DC conversion on power provided by an AC power grid through an AC-DC conversion module, outputting a first charging power based on a working state of the AC-DC conversion module, and outputting a second charging power through an energy storage module.

[0194] The working state of the AC / DC conversion module includes a positive polarity working state and a reverse polarity working state.

[0195] S302, the first charging power and the second charging power are connected in series and provided to a charging module for charging output, and the third charging power output by the charging module is provided to a to-be-charged device for charging.

[0196] Among them, the third charging power is greater than the first charging power.

[0197] In some embodiments, Figure 5 As shown, the storage-charging integrated device 10 further includes a first switch module, and the first switch module includes a first switch and a second switch; the method further includes:

[0198] When both the first switch and the second switch are in the on state, the charging module can charge the device to be charged based on the first charging power provided by the AC / DC conversion module and the second charging power provided by the energy storage module.

[0199] In some embodiments, Figure 6 As shown, the storage-charging device 10 further includes a first switch module 104, and the first switch module 104 includes a first switch K1, a second switch K2, a third switch K3, a fourth switch K4 and a fifth switch K5; the method further includes:

[0200] When the first switch K1, the second switch K2, the third switch K3 and the fourth switch K4 are all in the on state and the fifth switch K5 is in the off state, the charging module 103 is able to charge the device to be charged 202 based on the first charging power provided by the AC-DC conversion module 102 and the second charging power provided by the energy storage module 101; or, it is also configured that when the first switch K1, the second switch K2 and the fifth switch K5 are all in the on state and the third switch K3 and the fourth switch K4 are in the off state, the charging module 103 is able to charge the device to be charged 202 based on the first charging power provided by the AC-DC conversion module 102, or to feed back electric energy to the AC power grid based on the output power of the device to be charged 202.

[0201] In some embodiments, Figure 7 As shown, the storage-charging device 10 further includes a second switch module 105, and the second switch module 105 includes a sixth switch K6; the method further includes:

[0202] When the fourth switch K4 , the fifth switch K5 and the sixth switch K6 are all in the on state, the energy storage module 101 is charged based on the first charging power provided by the AC / DC conversion module 102 , or electric energy is fed back to the AC power grid based on the output power of the energy storage module 101 .

[0203] In some embodiments, Figure 8 As shown, the storage-charging device 10 further includes a second switch module 105, and the second switch module 105 includes a seventh switch K7 and an eighth switch K8; the method further includes:

[0204] When the seventh switch K7 and the eighth switch K8 are both in the on state, the energy storage module 101 is charged based on the first charging power provided by the AC / DC conversion module 102 ; or electric energy is fed back to the AC power grid based on the output power of the energy storage module 101 .

[0205] In some embodiments, Fig.10As shown, the energy storage module 101 includes at least one energy storage unit, each energy storage unit includes an energy storage battery, and at least part of the at least one energy storage unit includes a third switch module; the method may also include:

[0206] When the third switch module is in the on state, the third switch module connects in series at least one energy storage unit in the charging circuit where the third switch K3 is located to provide a second charging power.

[0207] In some embodiments, as in the aforementioned embodiments Figure 7 , Figure 8 and Fig. 9 and Fig.10 As shown, the storage-charging integrated device 10 further includes a control module 106; the method may further include:

[0208] The control module 106 sends a driving signal to the first switch module 104, the second switch module 105, the third switch module and the third switch module, and controls the on and off states of the first switch module 104, the second switch module 105, the third switch module and the third switch module according to the driving signal.

[0209] In some embodiments, as in the aforementioned embodiments Figure 7 , Figure 8 and Fig. 9 and Fig.10 As shown, the storage-charging integrated device 10 further includes a communication module 107; the method may further include:

[0210] The control module 106 obtains the state parameters of the storage-charging integrated device and sends the state parameters of the storage-charging integrated device to the communication module 107;

[0211] The communication module 107 receives the status parameters of the storage-charging device and forwards them to the cloud platform.

[0212] The embodiment of the present application provides a charging control method, in which the first charging power provided by the AC / DC conversion module and the second charging power provided by the energy storage module are jointly output to the charging module for charging, so that the charging module provides a third charging power to the device to be charged for charging. In this way, since the energy storage module can output a higher second charging power, the storage-charging integrated device can output a larger third charging power that meets the supercharging / fast charging requirements based on the small power provided by the AC power grid, so there is no need to configure an additional transformer in the circuit, which reduces the cost of the storage-charging integrated device and reduces the size of the storage-charging integrated device. Moreover, the storage-charging integrated device can be connected to any position of the AC power grid without being restricted by the transformer access point, which improves the flexibility of the storage-charging integrated device and facilitates the rapid charging of electric vehicles.

[0213] In another embodiment of the present application, Fig.13This is a schematic diagram of the composition structure of a charging pile provided in an embodiment of the present application. Fig.13 As shown, the charging pile 40 includes the integrated storage and charging device 10 in the aforementioned embodiment.

[0214] In the embodiment of the present application, the charging pile 40 may include the integrated storage and charging device 10 in the aforementioned embodiment, and may also include other devices for interacting with the user, as well as supporting components, etc., which are not specifically limited here.

[0215] In another embodiment of the present application, Fig.14 A schematic diagram of the structure of a charging system provided in an embodiment of the present application Figure 1 .like Fig.14 As shown, the charging system includes a device to be charged 202 and the charging pile 40 in the aforementioned embodiment.

[0216] As in the aforementioned embodiment, the charging pile 40 includes an integrated storage and charging device, and the integrated storage and charging device is used to charge the device to be charged 202 .

[0217] Among them, the input power of the integrated storage and charging device is a low power input, the input power is ≤150kW, and the output power of the integrated storage and charging device is a high power output, the output power is ≥360kW. In other words, when the input power of the integrated storage and charging device is ≤150kW, the system output power is ≥360kW through the energy storage module inside the integrated storage and charging device. Moreover, the AC / DC conversion module interconnected with the transformer, that is, the rated power of the bidirectional AC / DC device is ≤150kW.

[0218] In addition, the ratio of the rated energy and rated power of the energy storage module is no more than 1:3. Based on the energy storage module, the ratio of the input power to the output power of the storage and charging device can be no more than 1:4.

[0219] In the embodiment of the present application, by connecting the energy storage device in series in the AC / DC output high-voltage circuit, an ultimate system architecture can be achieved. Without the need for a DCDC power module, the functions of low power input and high power output can be achieved, thereby significantly reducing costs.

[0220] like Figure 1 As shown, the negative pole of the energy storage module 101 inside the storage-charging integrated device 10 is connected to the device to be charged 202, that is, the negative pole of the car battery system, and the internal energy storage module 101 of the storage-charging integrated device 10 is connected in series with the car battery system, and the car battery system is charged by AC / DC. That is, the energy storage module 101 inside the storage-charging integrated device 10 is connected in series with the electric vehicle battery, and the positive pole of the energy storage module 101 is connected to the positive pole of the electric vehicle battery. Among them, U1-U2≤250V, AC / DC power P≤150kW, the charging power for the car P≥360kW, U1 is the voltage value corresponding to the device to be charged 202, and U2 is the voltage value corresponding to the energy storage module 101.

[0221] In the embodiments of the present application, Figure 2 As shown, the energy storage module 101 inside the storage-charging integrated device 10 can also be connected in series with the electric vehicle battery, and the negative electrode of the energy storage module 101 is connected to the negative electrode of the electric vehicle. Figure 2 and Figure 3 , so that U1-U2≤Uq (for example, Uq≤350V), the electric vehicle battery is charged through the AC / DC conversion module 102, that is, AC / DC. This time the electric vehicle battery is in a charging state, and the energy storage device inside the storage-charging integrated device 10 is in a discharging state, wherein U1 is the voltage value corresponding to the device to be charged 202, U2 is the voltage value corresponding to the energy storage module 101, and Uq is the voltage value output by the AC power grid after conversion.

[0222] like Figure 7 As shown, by controlling the on or off of multiple switches, the charging function, V2G function and the like can be realized respectively.

[0223] When the storage-charging device 10 charges the car, K5 and K6 are disconnected, and K1, K2, K3 and K4 are closed. The energy storage module 101 is connected in series in the AC / DC high-voltage circuit, and the energy storage module 101 and the AC / DC device charge the car together. At this time, the energy storage module 101 is in a discharging state, and the AC / DC is in a charging state for the entire vehicle.

[0224] When there is no car charging, only the AC power grid replenishes energy for the energy storage module 101 inside the integrated storage and charging device 10. It is necessary to disconnect K1, K2 and K3, and close K4, K5 and K6, so that the AC power grid can charge the energy storage module 101 alone.

[0225] When the integrated storage and charging device 10 charges the car and the energy storage device inside the integrated device is insufficient, the grid charges the car alone, and it is necessary to disconnect K3, K4 and K6 and close K1, K2 and K5. The AC grid charges the device to be charged 202 alone.

[0226] When the V2G function is implemented, the car feeds back electric energy to the AC grid. It is necessary to disconnect K3, K4 and K6, and close K1, K2 and K5. The charging device 202 feeds back electric energy to the AC grid.

[0227] When the energy storage device is used to feed back electric energy to the grid, it is necessary to disconnect K1, K2 and K3, and close K4, K5 and K6. The energy storage device inside the integrated machine feeds back electric energy to the grid.

[0228] like Figure 8As shown, the positive electrode of the energy storage module 101 is connected to the AC / DC conversion module 102, that is, the negative electrode of the AC / DC device, through K3, the negative electrode of the energy storage module 101 is connected to the negative electrode of the charging gun through K4 and K2, and the positive electrode of the AC / DC device is connected to the positive electrode of the charging gun through K1, and the energy storage module 101 is connected in series in the AC / DC high-voltage circuit. The energy storage module 101 is directly connected in series in the high-voltage circuit to charge the device 202 to be charged, such as a car.

[0229] When the storage-charging device 10 charges the car, K5, K7 and K8 are disconnected, and K1, K2, K3 and K4 are closed. The energy storage module 101 is connected in series in the AC / DC high-voltage circuit, and the energy storage module 101 and the AC / DC device charge the car together. At this time, the energy storage module 101 is in a discharging state, and the AC / DC is in a charging state for the entire vehicle.

[0230] When there is no car charging, K7 and K8 are closed, and K1, K2, K3, K4 and K5 are disconnected. The grid power energy charges the energy storage module 101 through AC / DC.

[0231] When the V2G function is turned on, K1, K2 and K5 are closed, and K3, K4, K7 and K8 are opened. The electric energy of the car is fed back to the grid through the AC / DC device.

[0232] like Fig. 9 As shown, the positive electrode of the energy storage module 101 is connected to the negative electrode of the AC / DC device through K3, the negative electrode of the energy storage device is connected to the negative electrode of the charging gun through K4 and K2, and the positive electrode of the AC / DC device is connected to the positive electrode of the charging gun through K1, and the energy storage device is connected in series in the AC / DC high-voltage circuit. The energy storage device is directly connected in series in the high-voltage circuit to charge the car.

[0233] When charging the car, disconnect K7 and K8, and close K1, K2, K3, and K4. The energy storage module 101 is connected in series in the AC / DC high-voltage circuit, and the energy storage module 101 and the AC / DC device charge the car together. At this time, the energy storage module 101 is in a discharging state, and the AC / DC is in a charging state for the entire vehicle.

[0234] When there is no car charging, close K7 and K8, and disconnect K1, K2, K3, and K4. The grid power charges the energy storage device through AC / DC.

[0235] like Fig.10As shown, in order to adapt to different vehicle voltage platforms (for example, the vehicle voltage platform is 400V or 800V), the energy storage module 101 is split into energy storage units 1 to n. The energy storage unit is connected to the high-voltage circuit by closing switch Kq1, switch Kq2, switch Kqn-1, or one of switches Kqn alone. The energy storage unit connected to the high-voltage circuit is connected in series with the AC / DC device (by disconnecting K5, K6 and K7, and closing K1, K2, K3 and K4 switches) to charge the whole vehicle. For example: when the vehicle voltage platform is 400V, Kq2 can be closed, Kq1, Kqn-1 and Kqn switches can be disconnected, and energy storage unit 1 and energy storage unit 2 can be connected to the high-voltage circuit. For example: when the vehicle voltage platform is 800V, Kqn can be closed, Kq1, Kq2 and Kqn-1 switches can be disconnected, and energy storage unit 1, energy storage unit 2, energy storage unit 3 and energy storage unit 4 can be connected to the high-voltage circuit.

[0236] Similarly, when there is no car charging, the energy storage device can be connected to the high-voltage circuit by closing one of the switches Kq1, Kq2, Kqn-1, or Kqn. At the same time, by closing K6 and K7 and disconnecting K1, K2, K3, K4, and K5, the grid power can be used to charge the energy storage module 101 through AC / DC.

[0237] When the V2G function is turned on, close K1, K2, K5, and open K3, K4, K6, and K7. By closing Kq1, Kq2, Kqn-1, or one of the Kqn switches separately, the energy storage unit is connected to the high-voltage circuit to achieve the V2G function.

[0238] In some embodiments, Fig.15 A schematic diagram of the structure of a charging system provided in an embodiment of the present application Figure 2 .like Fig.15 As shown, the charging module in the charging pile 40 includes a charging gun 401, and the output end of the charging gun 401 is connected to the device to be charged 202; wherein:

[0239] The integrated storage and charging device is used to charge the device to be charged 202 through a charging gun according to the first charging power provided by the AC / DC conversion module and the second charging power provided by the energy storage module; wherein the third charging power is greater than the first charging power.

[0240] It should be noted that in the embodiments of the present application, the charging module and / or the charging gun can be arranged in the integrated storage and charging device, or can be arranged outside the integrated storage and charging device, and connected to the integrated storage and charging device when the device to be charged 202 needs to be charged, and no specific limitation is made here.

[0241] In some embodiments, Fig.16 A schematic diagram of the structure of a charging system provided in an embodiment of the present application Figure 3 .like Fig.16 As shown, the charging system 50 also includes a cloud platform 501, which is connected to the storage-charging integrated device; wherein: the cloud platform 501 is configured to receive status parameters of the storage-charging integrated device.

[0242] In an embodiment of the present application, the cloud platform 501 can be set on a cloud server to obtain the status parameters collected by the control module in the storage-charging integrated device and display them to the operator.

[0243] The embodiment of the present application provides a charging system, which charges the device to be charged through a charging gun, thereby improving the stability of the charging process, and receiving the status parameters of the storage-charging integrated device through a cloud platform, so as to facilitate real-time monitoring of the status of the storage-charging integrated device and timely handling when an abnormality occurs.

[0244] It should be understood that those skilled in the art should understand that the present application can be implemented in the form of hardware embodiments, software embodiments, or embodiments combining software and hardware. Moreover, the present application can be implemented in the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program codes.

[0245] It should also be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the serial numbers of the above-mentioned steps / processes does not mean the order of execution, and the execution order of each step / process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. The above-mentioned serial numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments.

[0246] It should be noted that, in this application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0247] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0248] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in each embodiment of the present application, each functional unit may be fully integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0249] The above is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A storage and charging device, characterized in that: The integrated storage and charging device comprises an energy storage module and a charging module, wherein: The first input end of the charging module is connected to the first output end of the AC-DC conversion module, the first end of the energy storage module is connected to the second output end of the AC-DC conversion module, the second end of the energy storage module is connected to the second input end of the charging module, and the input end of the AC-DC conversion module is connected to the AC power grid; the AC-DC conversion module is configured to provide a first charging power based on the working state; The charging module is configured to perform charging output based on the first charging power and the second charging power provided by the energy storage module in series, and provide the third charging power output by the charging module to the device to be charged for charging; wherein the third charging power is greater than the first charging power; Among them, the working state of the AC-DC conversion module includes a positive polarity working state and a reverse polarity working state; when the third charging power is greater than the second charging power, the AC-DC conversion module is in a reverse polarity working state; when the third charging power is less than or equal to the second charging power, the AC-DC conversion module is in a positive polarity working state.

2. The storage-charging integrated device according to claim 1, characterized in that: The positive terminal of the energy storage module is connected to the negative terminal of the AC / DC conversion module, the negative terminal of the energy storage module is connected to the negative terminal of the charging module, and the positive terminal of the charging module is connected to the positive terminal of the AC / DC conversion module; or, The negative terminal of the energy storage module is connected to the positive terminal of the AC / DC conversion module, the positive terminal of the energy storage module is connected to the positive terminal of the charging module, and the negative terminal of the charging module is connected to the negative terminal of the AC / DC conversion module.

3. The storage-charging integrated device according to claim 1, characterized in that: The storage-charging integrated device also includes an AC-DC conversion module; wherein: The AC / DC conversion module is configured to provide a first charging power to the charging module and the energy storage module.

4. The storage-charging integrated device according to claim 1, characterized in that: The integrated storage and charging device further includes a first switch module; The first switch module includes a first switch and a second switch, wherein the first switch is connected in series between the first output end of the AC / DC conversion module and the first input end of the charging module, and the second switch is connected in series between the second end of the energy storage module and the second input end of the charging module.

5. The storage-charging integrated device according to claim 4, characterized in that: The first switch module further includes a third switch, a fourth switch and a fifth switch; One end of the third switch is respectively connected to the second output end of the AC / DC conversion module and one end of the fifth switch, the other end of the third switch is connected to the first end of the energy storage module, one end of the fourth switch is connected to the second end of the energy storage module, the other end of the fourth switch is respectively connected to the other end of the fifth switch and one end of the second switch, and the other end of the second switch is connected to the second input end of the charging module.

6. The storage-charging integrated device according to claim 5, characterized in that: The integrated storage and charging device further includes a second switch module, wherein the second switch module includes a sixth switch; One end of the sixth switch is connected to the first output end of the AC / DC conversion module, and the other end of the sixth switch is respectively connected to the first end of the energy storage module and one end of the third switch.

7. The storage-charging integrated device according to claim 5, characterized in that: The storage-charging integrated device further includes a second switch module, wherein the second switch module includes a seventh switch and an eighth switch; The seventh switch is connected in series between the first output end of the AC / DC conversion module and the first end of the energy storage module, and the eighth switch is connected in series between the second output end of the AC / DC conversion module and the second end of the energy storage module.

8. The storage-charging integrated device according to claim 1, characterized in that: The energy storage module includes at least one energy storage unit, wherein: The at least one energy storage unit is connected in series and / or in parallel between the first end of the energy storage module and the second end of the energy storage module to provide the second charging power.

9. The storage-charging integrated device according to claim 8, characterized in that: Each of the energy storage units includes an energy storage battery, and each of the energy storage units is configured to provide a fourth charging power based on the electric energy of the energy storage battery; wherein the fourth charging power is less than or equal to the second charging power.

10. The storage-charging integrated device according to claim 9, characterized in that: At least part of the at least one energy storage unit comprises a third switch module, and the third switch module is connected in series between the first end of the corresponding energy storage unit and the second output end of the AC-DC conversion module.

11. The storage-charging integrated device according to claim 1, characterized in that: The storage-charging integrated device also includes a control module; wherein: The control module is connected to the first switch module, the second switch module and the third switch module, and is configured to send a driving signal to the first switch module, the second switch module and the third switch module; wherein the driving signal is used to control the on and off states of the first switch module, the second switch module and the third switch module.

12. The storage-charging integrated device according to claim 11, characterized in that: The storage-charging integrated device further includes a communication module; the communication module is connected to the control module; wherein: The control module is configured to obtain the state parameters of the storage-charging integrated device and send the state parameters of the storage-charging integrated device to the communication module; The communication module is configured to receive status parameters of the storage-charging device and forward them to the cloud platform.

13. The integrated storage and charging device according to any one of claims 1 to 12, characterized in that: The AC / DC conversion module is a bidirectional ACDC module.

14. The integrated storage and charging device according to any one of claims 1 to 12, characterized in that: The ratio between the rated energy and the rated power of the energy storage module is less than or equal to a first preset value; The ratio between the input power and the output power of the integrated storage and charging device is less than or equal to a second preset value; wherein the first preset value is greater than the second preset value.

15. The integrated storage and charging device according to any one of claims 1 to 12, characterized in that: The first charging power is less than or equal to 150 kilowatts, and the third charging power is greater than or equal to 360 kilowatts.

16. A charging control method, characterized in that: Applied to a storage-charging integrated device, the storage-charging integrated device includes an energy storage module and a charging module, and the method includes: Performing AC-DC conversion on the power provided by the AC power grid through the AC-DC conversion module, outputting a first charging power based on the working state of the AC-DC conversion module, and outputting a second charging power through the energy storage module; The first charging power and the second charging power are connected in series and provided to the charging module for charging output, and the third charging power output by the charging module is provided to the device to be charged for charging; wherein the third charging power is greater than the first charging power; Among them, the working state of the AC-DC conversion module includes a positive polarity working state and a reverse polarity working state; when the third charging power is greater than the second charging power, the AC-DC conversion module is in a reverse polarity working state; when the third charging power is less than or equal to the second charging power, the AC-DC conversion module is in a positive polarity working state.

17. The method according to claim 16, characterized in that The integrated storage and charging device further includes a first switch module, wherein the first switch module includes a first switch and a second switch; the method further includes: When the first switch and the second switch are both in the on state, the charging module is enabled to charge the device to be charged based on the first charging power provided by the AC / DC conversion module and the second charging power provided by the energy storage module.

18. The method according to claim 17, characterized in that The integrated storage and charging device further includes a first switch module, wherein the first switch module includes a first switch, a second switch, a third switch, a fourth switch and a fifth switch; the method further includes: When the first switch, the second switch, the third switch and the fourth switch are all in the on state and the fifth switch is in the off state, the charging module is enabled to charge the device to be charged based on the first charging power provided by the AC-DC conversion module and the second charging power provided by the energy storage module; or, it is also configured that when the first switch, the second switch and the fifth switch are all in the on state and the third switch and the fourth switch are in the off state, the charging module is enabled to charge the device to be charged based on the first charging power provided by the AC-DC conversion module, or to feed back electric energy to the AC power grid based on the output power of the device to be charged.

19. The method according to claim 18, characterized in that The integrated storage and charging device further includes a second switch module, and the second switch module includes a sixth switch; the method further includes: When the fourth switch, the fifth switch and the sixth switch are all in the on state, the energy storage module is charged based on the first charging power provided by the AC / DC conversion module, or electric energy is fed back to the AC power grid based on the output power of the energy storage module.

20. The method according to claim 18, characterized in that The integrated storage and charging device further includes a second switch module, wherein the second switch module includes a seventh switch and an eighth switch; and the method further includes: When the seventh switch and the eighth switch are both in the on state, the energy storage module is charged based on the first charging power provided by the AC / DC conversion module; or electric energy is fed back to the AC power grid based on the output power of the energy storage module.

21. The method according to claim 18, characterized in that The energy storage module includes at least one energy storage unit, and at least part of the at least one energy storage unit includes a third switch module; the method further includes: When the third switch module is in the on state, the third switch module connects in series at least one energy storage unit in the charging circuit where the third switch is located to provide the second charging power.

22. A charging pile, characterized in that: The charging pile comprises a storage-charging integrated device as claimed in any one of claims 1 to 15.

23. A charging system, characterized in that: The charging system includes a device to be charged and a charging pile as described in claim 22.

24. The charging system according to claim 23, characterized in that: The charging module includes a charging gun, and the output end of the charging gun is connected to the device to be charged; wherein: The integrated storage and charging device is used to charge the device to be charged through the charging gun according to the first charging power provided by the AC / DC conversion module and the second charging power provided by the energy storage module; wherein the third charging power is greater than the first charging power.

25. The charging system according to claim 23, characterized in that: The charging system further includes a cloud platform, which is connected to the storage-charging integrated device; wherein: The cloud platform is configured to receive status parameters of the storage-charging device.

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