Charging control method, device, charging system and storage medium

Abstract

The present application discloses a charging control method, device, charging system and storage medium, the charging control method comprising: determining the power supply capacity information of the energy storage module and the DC conversion module in the storage-charging integrated device and the charging demand information of the device to be charged; determining the working state of the DC conversion module according to the power supply capacity information of the energy storage module and the DC conversion module and the charging demand information of the device to be charged; according to the working state of the DC conversion module, controlling the charging module in the storage-charging integrated device to charge the device to be charged; wherein the storage-charging integrated device comprises an energy storage module, a DC conversion module and a charging module, the DC conversion module is configured to provide the input external power to the charging module, and the DC conversion module is connected in series with the energy storage module so that the charging module can provide the required charging power to the device to be charged. In this way, the application scope of the storage-charging integrated device is expanded and the charging efficiency is improved.

Description

Technical Field

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

[0002] At present, with the rapid growth of the new energy vehicle market, the construction of charging infrastructure is particularly important. Among the many charging solutions, the integrated storage and charging machine, as a device that integrates energy storage system and charging function, has become the first choice for many charging stations.

[0003] The integrated storage and charging machine can charge new energy vehicles through the internal energy storage battery, but the output voltage of the energy storage battery is fixed, and its output voltage is difficult to adapt to the charging voltage of various new energy vehicles, which reduces the charging efficiency. Summary of the invention

[0004] The present application proposes a charging control method, device, charging system and storage medium, which can enable the integrated storage and charging device to achieve voltage adaptation with a variety of devices to be charged, thereby expanding the application scope of the integrated storage and charging device and improving the charging efficiency.

[0005] The technical solution of this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a charging control method, the charging control method comprising:

[0007] Determine the power supply capacity information of the energy storage module and the DC conversion module in the integrated storage and charging device, as well as the charging demand information of the device to be charged;

[0008] Determine the working state of the DC conversion module according to the power supply capacity information of the energy storage module and the DC conversion module and the charging demand information of the device to be charged; wherein the working state includes a positive polarity working state and a reverse polarity working state;

[0009] According to the working state of the DC conversion module, the charging module in the storage-charging integrated device is controlled to charge the device to be charged;

[0010] Among them, the integrated storage and charging device includes an energy storage module, a DC conversion module and a charging module. The DC conversion module is configured to provide the input external power to the charging module, and the DC conversion module is connected in series with the energy storage module so that the charging module can provide the required charging power to the device to be charged.

[0011] Through the above technical means, the working state of the DC conversion module is determined according to the power supply capacity information of the energy storage module and the DC conversion module and the charging demand information of the device to be charged, so that the charging module is controlled to charge the device to be charged according to the positive polarity working state or the reverse polarity working state of the DC conversion module. In this way, according to the working state of the DC conversion module, the charging power output by the DC conversion module and the charging power provided by the energy storage module are jointly provided to the charging module, so that the charging power output by the charging module is wider than the input range of the external power, and the flexibility of the charging power output by the charging module can be improved, so that the range of the charging power is larger, so that voltage adaptation can be achieved with a variety of devices to be charged, the application scope of the storage and charging device is expanded, and the charging efficiency is improved.

[0012] In some embodiments, the working state of the DC conversion module is determined according to the respective power supply capacity information of the energy storage module and the DC conversion module and the charging requirement information of the device to be charged, including: providing a first charging power to the charging module according to the power supply capacity information of the DC conversion module; providing a second charging power to the charging module according to the power supply capacity information of the energy storage module; and determining the working state of the DC conversion module according to the first charging power, the second charging power and the charging requirement information of the device to be charged.

[0013] Through the above-mentioned technical means, according to the working state of the DC conversion module, the charging power output by the DC conversion module and the charging power provided by the energy storage module are jointly provided to the charging module, so that the charging power output by the charging module is wider than the input range of the external power, and the flexibility of the charging power output by the charging module can be improved, so that voltage adaptation can be achieved with a variety of devices to be charged, thereby improving the charging efficiency.

[0014] In some embodiments, according to the working state of the DC conversion module, the charging module in the integrated storage and charging device is controlled to charge the device to be charged, including: when the DC conversion module is in a positive polarity working state, the first charging power output by the DC conversion module and the second charging power output by the energy storage module are provided to the charging module, and the third charging power output by the charging module is used to charge the device to be charged; or, when the DC conversion module is in a reverse polarity working state, the first charging power output by the DC conversion module is fed back to the energy storage module, and the fourth charging power output by the energy storage module is provided to the charging module, and the fifth charging power output by the charging module is used to charge the device to be charged.

[0015] Through the above-mentioned technical means, through the working state of the DC conversion module, the first charging power provided by the DC conversion module and the second charging power provided by the energy storage module are superimposed or offset to charge the device to be charged through the charging module, thereby being able to achieve voltage adaptation with a variety of devices to be charged, expanding the application scope of the integrated storage and charging device, and improving the charging efficiency.

[0016] In some embodiments, the integrated storage and charging device also includes a first switch and a second switch, and the charging control method also includes: when the DC conversion module is in a positive polarity working state, in response to a first control signal sent by the control module, controlling the first switch and the second switch to be in a disconnected state; when the DC conversion module is in a reverse polarity working state, in response to a second control signal sent by the control module, controlling the first switch and the second switch to be in a conductive state; wherein the first switch is connected in series between the first input end of the DC conversion module and the first output end of the energy storage module, and the second switch is connected in series between the second input end of the DC conversion module and the second output end of the energy storage module.

[0017] Through the above-mentioned technical means, by controlling the on state and the off state of the first switch and the second switch to match the working state of the DC conversion module, the first charging power provided by the DC conversion module and the second charging power provided by the energy storage module are superimposed or offset to charge the device to be charged through the charging module, which can improve the flexibility of the charging power output by the charging module, making the range of the charging power larger, so that voltage adaptation can be achieved with a variety of devices to be charged, expanding the application scope of the integrated storage and charging device, and improving the charging efficiency.

[0018] Through the above-mentioned technical means, when it is detected that the integrated storage and charging device has established a communication connection with the device to be charged, the charging control method also includes: determining whether the device to be charged has a vehicle-to-grid V2G demand based on the charging demand information of the device to be charged; when the device to be charged has a V2G demand, in response to the V2G demand of the device to be charged, controlling the integrated storage and charging device to enter a first working mode; wherein the first working mode is used to control the device to be charged to feed back electrical energy to an external power source.

[0019] Through the above-mentioned technical means, when it is detected that the integrated storage and charging device establishes a communication connection with the device to be charged, if it is determined based on the charging demand information of the device to be charged that the device to be charged has V2G requirements, then the device to be charged can be controlled to feed back electric energy to the external power, which can play the role of peak shaving and valley filling for the external power, thereby improving the utilization rate of electric energy.

[0020] In some embodiments, the charging control method also includes: when the device to be charged does not have a V2G requirement, determining whether the energy storage module meets a first preset condition based on the power supply energy information of the energy storage module; when the energy storage module meets the first preset condition, controlling the storage-charging integrated device to enter a second working mode; wherein the second working mode is used to control external power and the energy storage module to jointly charge the device to be charged; when the energy storage module does not meet the first preset condition, controlling the storage-charging integrated device to enter a third working mode; wherein the third working mode is used to control external power to charge the device to be charged.

[0021] Through the above-mentioned technical means, if it is determined based on the charging demand information of the device to be charged that the device to be charged does not have the V2G demand, then it can be judged whether the energy storage module meets the first preset condition, that is, whether the power of the energy storage module is sufficient, and whether to combine external power to power the device to be charged can be selected according to the actual situation of the energy storage module, so as to avoid safety problems caused by over-discharge of the energy storage module, thereby improving the charging safety; and the small power provided by the external power 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.

[0022] In some embodiments, the integrated storage and charging device also includes a third switch and a fourth switch, and the charging control method also includes: when the integrated storage and charging device is in the first working mode, in response to the third control signal sent by the control module, the first switch and the fourth switch are controlled to be in the on state and the second switch and the third switch are in the off state; when the integrated storage and charging device is in the second working mode, in response to the fourth control signal sent by the control module, the third switch is controlled to be in the on state and the first switch, the second switch and the fourth switch are in the off state; when the integrated storage and charging device is in the third working mode, in response to the fifth control signal sent by the control module, the first switch and the fourth switch are controlled to be in the on state and the second switch and the third switch are in the off state; wherein the third switch is connected in series between the first output end of the DC conversion module and the second output end of the energy storage module, and the fourth switch is connected in series between the second input end of the DC conversion module and the second input end of the charging module.

[0023] Through the above-mentioned technical means, by controlling the on and off states of the first switch, the second switch, the third switch and the fourth switch to match the working mode of the integrated storage and charging device, charging can be performed according to the actual conditions of the external power, the integrated storage and charging device and the equipment to be charged, thereby improving the storage and charging flexibility of the integrated storage and charging device.

[0024] In some embodiments, when it is detected that no communication connection is established between the integrated storage and charging device and the device to be charged, the charging control method further includes: when it is determined that the power supply load of the external power is greater than a preset load threshold, controlling the integrated storage and charging device to enter a fourth operating mode; wherein the fourth operating mode is used to control the energy storage module to feed back electrical energy to the external power.

[0025] Through the above-mentioned technical means, when it is detected that the integrated storage and charging device has not established a communication connection with the device to be charged, if the power supply load of the external power is greater than the preset load threshold, the energy storage module can be controlled to feed back electric energy to the external power, so as to achieve an energy balance between the energy storage module and the external power, play the role of peak shaving and valley filling for the external power, and thus improve the utilization rate of electric energy.

[0026] In some embodiments, the integrated storage and charging device also includes a fifth switch and a sixth switch, and the charging control method also includes: when the integrated storage and charging device is in a fourth operating mode, in response to a sixth control signal sent by the control module, controlling the first switch and the second switch to be in an on state and the third switch, the fourth switch, the fifth switch and the sixth switch to be in an off state; wherein the fifth switch is connected in series between the second output terminal of the DC conversion module and the second input terminal of the charging module, and the sixth switch is connected in series between the first output terminal of the energy storage module and the first input terminal of the charging module.

[0027] Through the above-mentioned technical means, by controlling the first switch and the second switch to be in the on state and controlling the third switch, the fourth switch, the fifth switch and the sixth switch to be in the off state, so as to match the fourth working mode of the storage and charging device, charging selection can be made according to the actual situation of the external power and the storage and charging device, thereby improving the flexibility of charging; the switch can also be turned off when charging is not needed to reduce energy waste.

[0028] In some embodiments, when it is detected that no communication connection is established between the integrated storage and charging device and the device to be charged, the charging control method further includes: determining whether the energy storage module meets a second preset condition based on the power supply capacity information of the energy storage module; when the energy storage module does not meet the second preset condition, controlling the integrated storage and charging device to enter a fifth working mode; wherein the fifth working mode is used to control external power to charge the energy storage module.

[0029] Through the above-mentioned technical means, when it is detected that the integrated storage-charging device has not established a communication connection with the device to be charged, if it is determined based on the power supply energy information of the energy storage module that the energy storage module does not meet the preset second preset condition, that is, the power of the energy storage module is low, then the external power can be controlled to charge the energy storage module, so that more electric energy can be stored for the energy storage module, thereby improving the utilization rate of electric energy.

[0030] In some embodiments, the charging control method also includes: when the integrated storage and charging device is in the fifth operating mode, in response to the seventh control signal sent by the control module, controlling the first switch and the second switch to be in the on state and the third switch, the fourth switch, the fifth switch and the sixth switch to be in the off state.

[0031] Through the above-mentioned technical means, by controlling the first switch and the second switch to be in the on state and controlling the third switch, the fourth switch, the fifth switch and the sixth switch to be in the off state, so as to match the fifth working mode of the storage and charging device, charging selection can be made according to the actual situation of the external power and the storage and charging device, thereby improving the flexibility of charging; the switch can also be turned off when charging is not needed to reduce energy waste.

[0032] In some embodiments, the charging control method also includes: when it is detected that the working mode of the integrated storage and charging device meets the preset mode stop condition, or the integrated storage and charging device meets the charging cut-off condition, stopping the flow of electric energy between the energy storage module, the device to be charged and the external power.

[0033] Through the above-mentioned technical means, when it is detected that the working mode of the integrated storage and charging device meets the preset mode stop condition, or the integrated storage and charging device meets the charging cut-off condition, that is, there is a fault in the energy storage module or the device to be charged, the flow of electric energy between the energy storage module, the device to be charged and the external power is stopped at this time, thereby improving charging safety.

[0034] In a second aspect, an embodiment of the present application provides a charging control device, the charging control device comprising a determining unit and a charging unit, wherein:

[0035] A determination unit is configured to determine the power supply capacity information of the energy storage module and the DC conversion module in the storage-charging integrated device and the charging requirement information of the device to be charged; determine the working state of the DC conversion module according to the power supply capacity information of the energy storage module and the DC conversion module and the charging requirement information of the device to be charged; wherein the working state includes a positive polarity working state and a reverse polarity working state;

[0036] The charging unit is configured to control the charging module in the storage-charging integrated device to charge the device to be charged according to the working state of the DC conversion module;

[0037] Among them, the integrated storage and charging device includes an energy storage module, a DC conversion module and a charging module. The DC conversion module is configured to provide the input external power to the charging module, and the DC conversion module is connected in series with the energy storage module so that the charging module can provide the required charging power to the device to be charged.

[0038] In a third aspect, an embodiment of the present application provides a charging system, the charging system comprising a device to be charged and an integrated storage and charging device; wherein the integrated storage and charging device comprises the charging control device as described in the second aspect.

[0039] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed, a charging control method as described in any one of the first aspects is implemented.

[0040] 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

[0041] Figure 1 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 1 ;

[0042] Figure 2 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 2 ;

[0043] Figure 3 A schematic diagram of the structure of a storage-charging integrated device provided in an embodiment of the present application Figure 3 ;

[0044] Figure 4 A schematic diagram of a charging control method provided in an embodiment of the present application Figure 1 ;

[0045] Figure 5 A schematic diagram of a charging control method provided in an embodiment of the present application Figure 2 ;

[0046] Figure 6 A schematic diagram of a charging control method provided in an embodiment of the present application Figure 3 ;

[0047] Figure 7 A detailed flow chart of a charging control method provided in an embodiment of the present application;

[0048] Figure 8 A schematic diagram of the structure of a charging control device provided in an embodiment of the present application;

[0049] Fig. 9 A schematic diagram of the structure of a charging system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] The following is an introduction to the related technologies of this application.

[0056] 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.

[0057] 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.

[0058] In the embodiments of the present application, the battery may be a battery cell, or may be a battery pack (Pack) composed of multiple battery cells. A battery cell refers to a basic unit that can realize the mutual conversion of 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., which is not limited in the embodiments of the present disclosure.

[0059] 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.

[0060] The integrated energy storage and charging device is a device that integrates energy storage system and charging function. It can store the power of the power grid through the internal energy storage battery during the low power consumption period, and provide charging services for new energy vehicles through the energy storage battery during the peak power consumption period, thereby effectively alleviating the load of the power grid, optimizing the utilization of power resources, reducing electricity costs, and playing the role of peak shaving and valley filling.

[0061] Although the integrated storage and charging machine can charge new energy vehicles through the internal energy storage battery, the output voltage of the energy storage battery is fixed, which does limit the storage and charging flexibility of the integrated storage machine. And because the capacity and charging power of the energy storage battery are fixed, it is impossible to achieve the optimal storage and charging strategy when facing different charging needs and grid loads.

[0062] In addition, the integrated storage and charging machine can charge new energy vehicles through the internal energy storage battery, but the output voltage of the energy storage battery is fixed, and its output voltage is difficult to adapt to the charging voltage of various new energy vehicles, which reduces the charging efficiency.

[0063] Based on this, an embodiment of the present application provides a charging control method, which determines the working state of the DC conversion module according to the power supply capacity information of the energy storage module and the DC conversion module and the charging demand information of the device to be charged, so that the charging module is controlled to charge the device to be charged according to the positive polarity working state or the reverse polarity working state of the DC conversion module. In this way, according to the working state of the DC conversion module, the charging power output by the DC conversion module and the charging power provided by the energy storage module are jointly provided to the charging module, so that the charging power output by the charging module has a wider input range than the external power, and can improve the flexibility of the charging power output by the charging module, so that the range of the charging power is larger, so that voltage adaptation can be achieved with a variety of devices to be charged, expanding the scope of application of the storage and charging device, and improving the charging efficiency.

[0064] The present application is further described in detail below through the accompanying drawings and specific embodiments.

[0065] 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, a DC conversion module 102 and a charging module 103; wherein:

[0066] The input end of the DC conversion module 102 is configured to receive external power;

[0067] The first output terminal of the DC conversion module 102 is connected to the second output terminal of the energy storage module 101, the second output terminal of the DC conversion module 102 is connected to the second input terminal of the charging module 103, and the first input terminal of the charging module 103 is connected to the first input terminal of the energy storage module 101;

[0068] The charging module 103 is connected in series with the DC conversion module 102 and the energy storage module 103, and is configured to output or receive electric energy to the device to be charged.

[0069] In the embodiment of the present application, for the first output terminal P1 of the DC conversion module 102, the second output terminal P2 of the DC conversion module 102, the first output terminal P3 of the energy storage module 101, the second output 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, they can be respectively determined as positive terminals or negative terminals according to the specific structures to realize the series connection of the charging module 103, the DC conversion module 102 and the energy storage module 103.

[0070] 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.

[0071] In the embodiment of the present application, the external power can be a power supply device or an AC power grid, which is not specifically limited. It should be noted that if the external power is an AC power grid, an AC-DC conversion module needs to be connected between the AC power grid and the DC conversion module. The AC power grid is connected to the AC-DC conversion module, and can output AC voltage and AC current to the AC-DC conversion module. The AC-DC conversion module is configured to convert the AC voltage and AC current output by the AC power grid into DC power to output DC power to the DC conversion module. In addition, the AC power grid can be a three-phase AC power grid, and its input power is generally less than or equal to 150kW. 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 can be a power source for municipal power.

[0072] In the embodiment of the present application, the DC conversion module 102 may be an isolated bidirectional (Direct current-Direct current, DCDC) module. When the first input terminal of the DC conversion module 102 is connected to the second output terminal of the energy storage module 101, and the second input terminal of the DC conversion module 102 is connected to the first output terminal of the energy storage module 101, the DC conversion module 102 can realize DC positive and negative voltage output, that is, the DC conversion module 102 can adjust the direction of the output voltage in the received external power without changing the current direction, and output a positive or negative voltage. When the DC conversion module 102 outputs a positive voltage, that is, when the voltage is output to the second output terminal of the energy storage module 101, the DC conversion module 102 works in a positive polarity mode; when the DC conversion module 102 outputs a reverse voltage, that is, when the voltage is output to the first output terminal of the energy storage module 101, the DC conversion module 102 works in a reverse polarity mode.

[0073] Among them, when the first voltage value of the device to be charged 202 is greater than or equal to the second voltage value of the energy storage module 101, the working state of the DC conversion module 102 is a positive polarity state, and the output first charging power is positive; when the first voltage value of the device to be charged 202 is less than the second voltage value of the energy storage module 101, the working state of the DC conversion module 102 is a reverse polarity state, and the output first charging power is negative.

[0074] In the embodiment of the present application, -Ua≤U1-U2≤+Ub, wherein U1 is the battery voltage of the device to be charged 202, that is, the first voltage value output by the charging module 103, U2 is the second voltage value output by the energy storage module 101, -Ua is the limit of the negative voltage output by the DC conversion module 102, and +Ub is the limit of the positive voltage output by the DC conversion module 102.

[0075] It should be noted that when U1-U2≥0V, that is, the first voltage value of the device to be charged 202 is greater than or equal to the second voltage value of the energy storage module 101, that is, the total voltage of the charging circuit is less than the first voltage value of the device to be charged 202, so based on the law of energy conservation, the voltage of the charging circuit needs to be raised. At this time, the DC conversion module 102 works in a positive polarity and outputs a forward voltage, that is, the first charging power is positive, the DC conversion module 102 is connected in series with the energy storage module 101, and the sum of the second charging power output by the energy storage module 101 and the first charging power output by the DC conversion module 102 is provided to the charging module 103, so that the charging module 103 charges the device to be charged 202.

[0076] It should also be noted that when U1-U2 is less than 0V, that is, the first voltage value of the device to be charged 202 is less than the second voltage value of the energy storage module 101, that is, the total voltage of the charging circuit is greater than the first voltage value of the device to be charged 202, so based on the law of energy conservation, the voltage of the charging circuit needs to be reduced. At this time, the working mode of the DC conversion module 102 is reverse polarity, and the DC conversion module 102 outputs a negative voltage, that is, the negative work is fed back to the energy storage module 101 through the bus connected between the DC conversion module 102 and the energy storage module 101, reducing the output voltage of the energy storage module 101, and reducing the voltage amplitude to the value of the negative voltage output by the DC conversion module 102. In this way, the DC conversion module 102 works in a reverse polarity manner, providing the energy storage module 101 with a first charging power in the negative direction, reducing the output power of the energy storage module 101, and then the energy storage module 101 provides the fourth charging power after offsetting the first charging power to the charging module 103, so that the charging module 103 charges the device to be charged 202.

[0077] In the embodiment of the present application, it should be understood that as the charging process proceeds, the second voltage value output by the energy storage module 101 and the first voltage value output by the device to be charged 202 may change. Therefore, a voltage detection module may be provided on the energy storage module 101 and the device to be charged 202 to detect the voltage change in real time, and adjust the output first charging power of the DC conversion module 102 according to the comparison result of the first voltage value and the second voltage value, and control the DC conversion module 102 to work in a positive polarity mode or a reverse polarity mode.

[0078] It should also be noted that the external power can be an external power source or an AC power grid;

[0079] The embodiment of the present application provides a storage-charging integrated device, in which a DC conversion module converts input external power, and based on a structure in which a charging module, an energy storage module, and a DC conversion module are connected in series, charges and outputs or receives electric energy to a device to be charged. In this way, since the charging power output by the DC conversion module adjusts the charging power provided by the energy storage module, the charging power output by the charging module has a wider input range than the external power, and can improve the flexibility of the charging power output by the charging module, and can achieve voltage adaptation with a variety of devices to be charged, thereby expanding the scope of application of the storage-charging integrated device and improving the charging efficiency.

[0080] In some embodiments, 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 output terminal of the DC conversion module 102 , and the negative terminal of the energy storage module 101 is connected to the negative input terminal of the charging module 103 .

[0081] In the embodiment of the present application, the first output terminal P1 of the DC conversion module 102 can be a negative output terminal, and the second output terminal P2 of the DC conversion module 102 can be a positive output terminal. The first output terminal P3 of the energy storage module 101 can be a negative output terminal, the second output terminal P4 of the energy storage module 101 can be a positive output terminal, the first input terminal P5 of the charging module 103 can be a negative input terminal, and the second input terminal P6 of the charging module 103 can be a positive input terminal. It should be understood that whether each terminal in each module is a positive terminal or a negative terminal is determined specifically according to the device situation. In the present application and the following embodiments, based on Figure 2 The illustrated embodiment is described.

[0082] In some embodiments, the negative output terminal of the energy storage module 101 is connected to the positive output terminal of the DC conversion module 102 , and the positive output terminal of the energy storage module 101 is connected to the positive output terminal of the charging module 103 .

[0083] In the embodiment of the present application, the first output terminal P1 of the DC conversion module 102 may be a negative output terminal, and the second output terminal P2 of the DC conversion module 102 may be a positive output terminal. The first output terminal P3 of the energy storage module 101 may be a negative output terminal, and the second output 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.

[0084] The embodiment of the present application provides a storage-charge integrated device, in which the energy storage module can be arranged on the positive side of the DC conversion module or on the negative side of the DC conversion module. In this way, the flexibility of module arrangement in the storage-charge integrated device can be improved.

[0085] In another embodiment of the present application, 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 storage-charging integrated device 10 further includes an AC-DC conversion module 104; wherein:

[0086] The input end of the AC / DC conversion module 104 is connected to the AC power grid 201;

[0087] The first output end of the energy storage module 101 is connected to the first output end of the AC / DC conversion module 104 and the first input end of the DC conversion module 102 respectively; the second output end of the energy storage module 101 is connected to the second output end of the AC / DC conversion module 104, the second input end of the DC conversion module 102 and the first output end of the DC conversion module 102 respectively;

[0088] The AC-DC conversion module 104 is configured to provide charging power to the DC conversion module.

[0089] In an embodiment of the present application, the AC / DC conversion module 104 may be an 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 may also be provided in the AC / DC conversion module 104 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 104, its output power is provided to the DC conversion module, which should be less than or equal to 150kW.

[0090] It should also be noted that the AC-DC conversion module 104 can be set in the integrated storage and charging device 10, or can be set outside the integrated storage and charging device 10, depending on actual needs.

[0091] In the embodiments of the present application, Figure 3 As shown, the AC-DC conversion module 104 is 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.

[0092] The embodiment of the present application provides a storage-charging integrated device, in which the energy storage module is connected to the AC-DC conversion module and the DC conversion module. In this way, the DC conversion module can output voltage bidirectionally to the energy storage module, thereby adjusting the output power of the charging module, thereby expanding the voltage adaptation range of the storage-charging integrated device to the device to be charged.

[0093] In one embodiment, see Figure 3 The storage-charging device 10 further includes a first switch module and a second switch module. The first switch module 105 includes a first switch K1 and a second switch K2. The second switch module 106 includes a third switch K3, a fifth switch K5 and a sixth switch K6. Wherein:

[0094] The first switch K1 is connected in series between the first input end of the DC conversion module 102 and the first output end of the energy storage module 101, the second switch K2 is connected in series between the second input end of the DC conversion module 102 and the second output end of the energy storage module 101, the third switch K3 is connected in series between the first output end of the DC conversion module 102 and the second output end of the energy storage module 101, the fifth switch K5 is connected in series between the second output end of the DC conversion module 102 and the second input end of the charging module 103, and the sixth switch K6 is connected in series between the first output end of the energy storage module 101 and the first input end of the charging module 103.

[0095] In the embodiment of the present application, when it is necessary to charge the device 202 to be charged by the integrated storage and charging device 10, the first switch K1, the second switch K2, the third switch K3, the fifth switch K5 and the sixth switch K6 can be turned on at the same time, and based on the above embodiment, according to the relationship between the output voltage of the energy storage module 101 and the voltage of the device 202 to be charged, the DC conversion module 102 is controlled to work in a positive polarity mode or a reverse polarity mode. When working in a positive polarity mode, the sum of the first charging power and the second charging power is used as the third charging power to power the device 202 to be charged; or, when working in a reverse polarity mode, the second charging power after the negative first charging power is offset is used as the fifth charging power to power the device 202 to be charged. Alternatively, when the first switch K1, the second switch K2, the third switch K3, the fifth switch K5 and the sixth switch K6 are turned off at the same time, the power supply to the device 202 to be charged is stopped. When the DC conversion module 102 works in a positive polarity mode, the DC conversion module 102 performs work in a positive direction, and the directions of the output current and the output voltage are positive. The positive direction is that the output end of the DC conversion module 102 outputs a voltage in the direction of the charging module 103; or, when the DC conversion module 102 works in a reverse polarity mode, the DC conversion module 102 performs work in a negative direction, the direction of the output current is still positive, and the direction of the output voltage is reverse. The reverse direction means that the DC conversion module 102 outputs a voltage in the direction of the energy storage module 101 via the path where the first switch K1 and the second switch K2 are located.

[0096] In the embodiment of the present application, the first switch K1 and the second switch K2 are used to control the on and off of the circuit between the DC conversion module 102 and the energy storage module 101. Based on the above embodiment, the DC conversion module 102 can work in a positive polarity mode or a reverse polarity mode according to the comparison between the output voltage of the energy storage module 101 and the voltage of the device to be charged 202. When the DC conversion module 102 works in a reverse polarity mode, the first switch K1 and the second switch K2 can be controlled to be closed, so that the DC conversion module 102 outputs a negative voltage to the energy storage module 101 through the circuit between the DC conversion module 102 and the energy storage module 101.

[0097] It should be noted that, in some embodiments, when the integrated storage-charging device 10 is powered on, the first switch K1 and the second switch K2 can be controlled to be always in the on state, regardless of the current working mode of the DC conversion module 102. In this way, the control logic can be simplified.

[0098] Alternatively, when there is no device 202 to be charged, only the first switch K1 and the second switch K2 may be turned on, thereby controlling the AC grid 201 to charge the energy storage module 101. Alternatively, the energy storage module 101 may be controlled to feed back electric energy to the AC grid 201.

[0099] In some embodiments, see Figure 3 The integrated storage-charging device 10 further includes a third switch module, which includes a fourth switch K4; the fourth switch K4 is connected in series between the second input end of the DC conversion module 102 and the second input end of the charging module 103.

[0100] In an embodiment of the present application, when the first switch K1, the fourth switch K4, the fifth switch K5 and the sixth switch K6 are all in the on state and the second switch K2 and the third switch K3 are in the off state, the charging module 103 can charge the device to be charged 202 based on the charging power provided by the AC / DC conversion module 104, or feed back electrical energy to the AC power grid 201 based on the output power of the device to be charged 202.

[0101] In an embodiment of the present application, the integrated storage and charging device may further include a control module, through which the power of the energy storage module 101 can be detected. If the power of the energy storage module 101 is insufficient, the first switch K1, the fourth switch K4, the fifth switch K5 and the sixth switch K6 can be controlled to be in an on state, so that only the AC power grid 201 charges the device to be charged 202, or the device to be charged 202 feeds back electric energy to the AC power grid 201.

[0102] In an embodiment of the present application, 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 control signal to the first switch module, the second switch module and the third switch module; wherein the control signal is used to control the on and off states of each switch in the first switch module, the second switch module and the third switch module.

[0103] In the embodiment of the present application, the control module may include a microcontroller unit (MCU), a sensor, a switch circuit and other devices, which are used to monitor, control and manage the storage-charging device 10. In addition, the control module may be in the storage-charging device or outside the storage-charging device.

[0104] In the embodiment of the present application, the control module can send a control signal to each switch in the first switch module, the second switch module and the third switch module respectively. It should be understood that each control 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 control signal. Exemplarily, when the control signal is in a high level state, the corresponding switch can be controlled to be turned on, and when the control signal is in a low level state, the corresponding switch can be controlled to be turned off.

[0105] In an embodiment of the present application, the control module 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.

[0106] In some embodiments, the AC-DC conversion module 104 is a bidirectional ACDC module, and the DC conversion module 102 is a bidirectional DCDC module.

[0107] It should be noted that the AC / DC conversion module 104 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 104 is not limited here.

[0108] It should be noted that the DC conversion module 102 can also be an isolated unidirectional DCDC module or an isolated bidirectional DCDC module, in which an isolation chip is provided to isolate the storage-charge integrated device 10 from the AC-DC conversion module 104, and can work in a positive polarity or reverse polarity mode based on the control of the control module. The specific structure of the DC conversion module 102 is not limited here.

[0109] In some embodiments, a voltage difference between a first voltage value of the device to be charged and a second voltage value of the energy storage module is less than or equal to a first preset value.

[0110] It should be noted that, in the absence of a transformer, the voltage input from the AC power grid to the integrated storage and charging device 10 is less than or equal to a first preset value, wherein the value of the first preset value can be determined according to actual conditions, and can be 250 volts or 350 volts. Therefore, the output voltage of the energy storage module 101, i.e., the second voltage value, can be adjusted by controlling the number of connected energy storage units, or the voltage value output by the DC conversion module can be adjusted so that the difference between the voltage and the charging voltage of the device to be charged 202, i.e., the first voltage value, is less than or equal to the first preset value.

[0111] The embodiment of the present application provides a storage-charging integrated device, which controls the conduction and disconnection of each switch in the first switch module and the second switch module, and charges the device to be charged together with the energy storage module based on the working state of the DC conversion module, and controls whether the storage-charging integrated device charges the device to be charged and whether the AC power grid charges the energy storage module. In this way, not only the power application range of the device to be charged is broadened, but also the switch can be turned off when charging is not needed, reducing energy waste.

[0112] In another embodiment of the present application, Figure 4 A schematic diagram of a charging control method provided in an embodiment of the present application Figure 1 .like Figure 4 As shown, the charging control method may include:

[0113] S401: Determine the power supply capacity information of the energy storage module and the DC conversion module in the integrated storage-charging device and the charging demand information of the device to be charged.

[0114] In the embodiment of the present application, the charging control method can be applied to the storage-charging integrated device in the above embodiment, such as Figure 1 As shown, the integrated storage and charging device may include an energy storage module, a DC conversion module and a charging module. The DC conversion module is configured to provide input external power to the charging module, and the DC conversion module is connected in series with the energy storage module so that the charging module can provide the required charging power to the device to be charged.

[0115] In the embodiment of the present application, the device to be charged may be an electrical device, such as a battery vehicle, ship or spacecraft, etc. Alternatively, the device to be charged may be another energy storage module different from the energy storage module mentioned above, and the state of charge (SOC) of the other energy storage module is relatively small.

[0116] In an embodiment of the present application, the charging requirement information of the device to be charged may indicate the charging requirement power of the device to be charged when the device to be charged needs to be charged, and the charging requirement information of the device to be charged may also indicate that the device to be charged needs to feed back electric energy to the external power (i.e., V2G requirement). The power supply capacity information of the DC conversion module may be determined by external power, and the power supply energy of the DC conversion module is determined by receiving external power. The power supply energy of the energy storage module may be determined by the SOC and voltage of the energy storage module.

[0117] In an embodiment of the present application, the integrated storage and charging device determines the working state of the DC conversion module based on the charging demand information of the charging demand power of the device to be charged and the power supply capacity information corresponding to the energy storage module and the DC conversion module. In this way, without making hardware improvements to the external power (such as the AC power grid), the charging demand of the device to be charged can be met within the discharge capacity of the integrated storage and charging device, thereby improving the output power of the integrated storage and charging device, and further achieving the purpose of charging the device to be charged with small power input and high power output. For example, there is no need to additionally configure an external transformer for the power grid or expand the transformer capacity, thereby increasing the charging rate of the device to be charged at a relatively low construction cost.

[0118] S402, determining the working state of the DC conversion module according to the power supply capacity information of the energy storage module and the DC conversion module and the charging requirement information of the device to be charged.

[0119] In an embodiment of the present application, the working state of the DC conversion module includes a positive polarity working state and a reverse polarity working state. Specifically, the DC conversion module can realize DC positive and negative voltage output, that is, the DC conversion module can adjust the direction of the output voltage in the received external power without changing the direction of the current, and output a positive or negative voltage. In the case where the DC conversion module outputs a positive voltage, that is, when the voltage is output to the second output terminal of the energy storage module, the DC conversion module works in a positive polarity mode (that is, a positive polarity working state); in the case where the DC conversion module outputs a reverse voltage, that is, when the voltage is output to the first output terminal of the energy storage module, the DC conversion module works in a reverse polarity mode (that is, a positive polarity working state).

[0120] S403, according to the working state of the DC conversion module, control the charging module in the storage-charging integrated device to charge the device to be charged.

[0121] In some embodiments, when the DC conversion module is in a positive polarity working state, the first charging power output by the DC conversion module and the second charging power output by the energy storage module are provided to the charging module, and the third charging power output by the charging module is used to charge the device to be charged; or, when the DC conversion module is in a reverse polarity working state, the first charging power output by the DC conversion module is fed back to the energy storage module, and the fourth charging power output by the energy storage module is provided to the charging module, and the fifth charging power output by the charging module is used to charge the device to be charged.

[0122] Thus, in the embodiment of the present application, through the working state of the DC conversion module, the first charging power provided by the DC conversion module and the second charging power provided by the energy storage module are superimposed or offset through the charging module to charge the device to be charged, thereby improving the flexibility of the charging power output of the charging module and broadening the scope of application of the device to be charged.

[0123] The present application provides a charging control method, which determines the working state of the DC conversion module according to the power supply capacity information of the energy storage module and the DC conversion module and the charging demand information of the device to be charged, so as to control the charging module to charge the device to be charged according to the positive polarity working state or the reverse polarity working state of the DC conversion module. In this way, according to the working state of the DC conversion module, the charging power output by the DC conversion module and the charging power provided by the energy storage module are jointly provided to the charging module, so that the charging power output by the charging module is wider than the input range of the external power, and the flexibility of the charging power output by the charging module can be improved, so that the range of the charging power is larger, so that voltage adaptation can be achieved with a variety of devices to be charged, the application scope of the storage and charging integrated device is expanded, and the charging efficiency is improved.

[0124] In some embodiments, the working state of the DC conversion module is determined according to the respective power supply capacity information of the energy storage module and the DC conversion module and the charging requirement information of the device to be charged, including: providing a first charging power to the charging module according to the power supply capacity information of the DC conversion module; providing a second charging power to the charging module according to the power supply capacity information of the energy storage module; and determining the working state of the DC conversion module according to the first charging power, the second charging power and the charging requirement information of the device to be charged.

[0125] In an embodiment of the present application, if the external power input to the DC conversion module is an AC power grid, the integrated storage and charging device also includes an AC-DC conversion module, the input end of the AC-DC conversion module is connected to the AC power grid, and the output end of the AC-DC conversion module is connected to the input end of the DC conversion module. The AC-DC conversion module is used to convert the AC current provided by the AC power grid into DC power and provide it to the DC conversion module.

[0126] In an embodiment of the present application, when the charging requirement information of the device to be charged indicates that the device to be charged needs to be charged and indicates the charging requirement power of the device to be charged, the working state of the DC conversion module is determined according to the first charging power, the second charging power and the charging requirement power.

[0127] In the embodiment of the present application, if the charging power required by the device to be charged is greater than the second charging power provided by the energy storage module, the charging power provided by the charging module to the device to be charged needs to be increased. At this time, the working state of the DC conversion module is a positive polarity working state, that is, it outputs a positive first charging power. The DC conversion module is connected in series with the energy storage module, and the sum of the second charging power output by the energy storage module and the first charging power output by the DC conversion module is provided to the charging module, so that the charging module charges the device to be charged.

[0128] In an embodiment of the present application, if the second charging power provided by the energy storage module is greater than the charging demand power of the charging device of the device to be charged, it is necessary to reduce the charging power provided by the charging module to the device to be charged. At this time, the working state of the DC conversion module is the reverse polarity working state, that is, the first charging power is output in the opposite direction, and the second charging power output by the energy storage module is used to offset the first charging power output by the DC conversion module and provided to the charging module, so that the charging module charges the device to be charged.

[0129] Thus, in the embodiment of the present application, according to the working state of the DC conversion module, the charging power output by the DC conversion module and the charging power provided by the energy storage module are jointly provided to the charging module, so that the charging power output by the charging module is wider than the input range of the external power, and the flexibility of the charging power output by the charging module can be improved, so that the range of the charging power is larger, so that voltage adaptation can be achieved with a variety of devices to be charged, the application scope of the integrated storage and charging device is expanded, and the charging efficiency is improved.

[0130] In some embodiments, the charging control method further includes: determining a working state of the DC conversion module according to a first voltage value of the device to be charged and a second voltage value of the energy storage module.

[0131] When the first voltage value of the device to be charged is greater than or equal to the second voltage value of the energy storage module, the working state of the DC conversion module is a positive polarity working state, and the output first charging power is positive; when the first voltage value of the device to be charged is less than the second voltage value of the energy storage module, the working state of the DC conversion module is a reverse polarity working state, and the output first charging power is negative.

[0132] In the embodiment of the present application, -Ua≤U1-U2≤+Ub, wherein U1 is the battery voltage of the device to be charged, that is, the first voltage value output by the charging module, U2 is the second voltage value output by the energy storage module, -Ua is the limit of the negative voltage output by the DC conversion module, and +Ub is the limit of the positive voltage output by the DC conversion module.

[0133] It should be noted that when U1-U2≥0V, that is, the first voltage value of the device to be charged is greater than or equal to the second voltage value of the energy storage module, that is, the total voltage of the charging circuit is less than the first voltage value of the device to be charged, so based on the law of energy conservation, the voltage of the charging circuit needs to be raised. At this time, the DC conversion module works in a positive polarity and outputs a forward voltage, that is, the first charging power is positive, the DC conversion module is connected in series with the energy storage module, and the sum of the second charging power output by the energy storage module and the first charging power output by the DC conversion module is used to charge the device to be charged.

[0134] It should also be noted that when U1-U2 is less than 0V, that is, the first voltage value of the device to be charged is less than the second voltage value of the energy storage module, that is, the total voltage of the charging circuit is greater than the first voltage value of the device to be charged. Therefore, based on the law of conservation of energy, the voltage of the charging circuit needs to be reduced. At this time, the working mode of the DC conversion module is reverse polarity, and the DC conversion module outputs a negative voltage, that is, the negative work is fed back to the energy storage module through the bus connected between the DC conversion module and the energy storage module, thereby reducing the output voltage of the energy storage module and reducing the voltage amplitude to the value of the negative voltage output by the DC conversion module. In this way, the DC conversion module works in a reverse polarity manner, providing the energy storage module with a negative first charging power, reducing the output power of the energy storage module, and then the energy storage module uses the fourth charging power after offsetting the first charging power to charge the device to be charged.

[0135] That is to say, in the embodiment of the present application, the working state of the DC conversion module can be determined according to the first voltage value of the device to be charged and the second voltage value of the energy storage module, so as to control the AC power grid and the energy storage module to jointly supply power to the device to be charged.

[0136] In some embodiments, see the foregoing Figure 3 The integrated storage and charging device may further include a first switch and a second switch. The first switch is connected in series between the first input terminal of the DC conversion module and the first output terminal of the energy storage module, and the second switch is connected in series between the second input terminal of the DC conversion module and the second output terminal of the energy storage module. Accordingly, the charging control method may further include: when the DC conversion module is in a positive polarity working state, in response to a first control signal sent by the control module, controlling the first switch and the second switch to be in a disconnected state; when the DC conversion module is in a reverse polarity working state, in response to a second control signal sent by the control module, controlling the first switch and the second switch to be in a conducting state.

[0137] In an embodiment of the present application, the on state and the off state of the first switch and the second switch are controlled to match the working state of the DC conversion module, so that the first charging power provided by the DC conversion module and the second charging power provided by the energy storage module are superimposed or offset to charge the device to be charged through the charging module, which can improve the flexibility of the charging power output by the charging module, making the range of the charging power larger, so that voltage adaptation can be achieved with a variety of devices to be charged, expanding the scope of application of the integrated storage and charging device, and improving the charging efficiency.

[0138] In another embodiment of the present application, Figure 5 A schematic diagram of a charging control method provided in an embodiment of the present application Figure 2 .like Figure 5 As shown, after step S401, the charging control method further includes:

[0139] S501, determining a working mode of the integrated storage-charging device according to the respective power supply energies of the energy storage module and the DC conversion module and at least one of the charging demand information of the device to be charged.

[0140] S502, according to the working mode of the integrated storage and charging device, control the flow of electric energy between the energy storage module, the device to be charged and the external power.

[0141] In an embodiment of the present application, when the storage-charging device does not meet the charging cut-off condition, the working mode of the storage-charging device is determined according to the power supply energy of the energy storage module and the DC conversion module and at least one of the charging demand information of the device to be charged, and the flow of electric energy between the energy storage module, the device to be charged and the AC power grid is controlled according to the working mode. Here, for the charging cut-off condition, the charging cut-off condition is used to characterize the national standard charging cut-off condition or the state fault of the storage-charging device; wherein, the national standard charging cut-off condition may be that the device to be charged has problems such as over-temperature and over-voltage, and the state fault of the storage-charging device may be that the storage-charging device has insulation failure, component damage and other faults.

[0142] In an embodiment of the present application, the working modes of the integrated storage and charging device may include a first working mode, a second working mode, a third working mode, a fourth working mode and a fifth working mode; wherein: the first working mode is used to control the device to be charged to feed back electric energy to the external power; the second working mode is used to control the external power and the energy storage module to charge the device to be charged together; the third working mode is used to control the external power to charge the device to be charged; the fourth working mode is used to control the energy storage module to feed back electric energy to the external power; the fifth working mode is used to control the external power to charge the energy storage module.

[0143] In the embodiment of the present application, the energy flow mode is selected according to the status information of the energy storage module, the device to be charged and the external power, thereby improving the storage and charging flexibility of the integrated storage and charging device.

[0144] In some embodiments, the charging control method also includes: when it is detected that the working mode of the integrated storage and charging device meets the corresponding preset mode stop condition or the integrated storage and charging device meets the charging cut-off condition, stopping the flow of electric energy between the energy storage module, the device to be charged and the external power.

[0145] In an embodiment of the present application, the stop conditions for the preset mode may include a first stop condition (i.e., the stop condition of the first working mode), a second stop condition (i.e., the stop condition of the second working mode), a third stop condition (i.e., the stop condition of the third working mode), a fourth stop condition (i.e., the stop condition of the fourth working mode), a fifth stop condition (corresponding to the stop condition of the fifth working mode) and a vehicle-to-grid (V2G) stop condition.

[0146] In an embodiment of the present application, if the storage-charging integrated device includes a power module, the power module may include an AC-DC conversion module and / or a DC conversion module. Among them, the first stop condition is used to characterize the failure of the device to be charged or the failure of the power module, the second stop condition is used to characterize the failure of the energy storage module or the power module, the third stop condition is used to characterize the failure of the energy storage module or the power module, the third stop condition is used to characterize the failure of the power module, the fourth stop condition is used to characterize the failure of the energy storage module or the power module, the fifth stop condition is used to characterize the failure of the energy storage module or the energy storage module meets the third preset condition, and the V2G stop condition is used to characterize the failure of the device to be charged. It should be noted that for the failure of the energy storage module, it can be the overtemperature of the energy storage module, the overcurrent of the energy storage module, the undervoltage of the energy storage module, the overvoltage of the energy storage module, etc., that is, if the energy storage module fails, the energy storage module cannot be controlled to output electric energy or receive electric energy. For the failure of the power module, it can be the failure of the power module such as overtemperature, overcurrent, undervoltage, etc., that is, if the power module fails, the electric energy converted by the power module cannot be input or output. For a fault in the device to be charged, it may be that the device to be charged has over-temperature, over-current, under-voltage and the like. That is to say, if the device to be charged has a fault, the device to be charged cannot be controlled to output power or receive power.

[0147] In the embodiment of the present application, for the third preset condition, the third preset condition is used to indicate that the state of the energy storage module meets the charging requirements of the device to be charged, for example, the energy storage module is fully charged, which meets the charging requirements of the device to be charged.

[0148] In this way, when it is detected that the working mode of the integrated storage and charging device meets the corresponding mode stop condition, or the integrated storage and charging device meets the charging cut-off condition, such as there is a fault in the energy storage module or the device to be charged, the flow of electric energy between the energy storage module, the device to be charged and the external power is stopped at this time, thereby improving charging safety.

[0149] An embodiment of the present application provides a charging control method, which selects the energy flow mode according to the actual conditions of the energy storage module, the device to be charged and the AC power grid, and can improve the flexibility of storage and charging of the integrated storage and charging device. For example, when the device to be charged is connected to the integrated storage and charging device, the energy storage module and external power are controlled to charge the device to be charged, and the small power provided by the external power can achieve high-power output of the integrated storage and charging device, thereby reducing the cost of the integrated storage and charging device and improving the charging speed of the integrated storage and charging device; it is also possible to control the energy storage module to feed back electric energy to the external power, or control the external power to charge the energy storage module, when the device to be charged is not connected to the integrated storage and charging device, to achieve electric energy balance between the energy storage module and the external power, thereby improving the utilization rate of electric energy.

[0150] In another embodiment of the present application, the charging control method may further include: detecting whether a communication connection is established between the integrated storage and charging device and the device to be charged.

[0151] In an embodiment of the present application, the storage-charging device may include a charging module, and the charging module may include a charging gun. By detecting whether the output end of the charging gun is connected to the device to be charged, it is determined whether the storage-charging device has established a communication connection with the device to be charged. Exemplarily, when the charging gun is connected to the device to be charged, an identification signal of the charging gun is obtained, and the identification signal is used to indicate that the storage-charging device has established a communication connection with the device to be charged.

[0152] In some embodiments, when it is detected that the integrated storage and charging device has established a communication connection with the device to be charged, the charging control method also includes: determining whether the device to be charged has a vehicle-to-grid V2G demand based on the charging demand information of the device to be charged; when the device to be charged has a V2G demand, in response to the V2G demand of the device to be charged, controlling the integrated storage and charging device to enter a first working mode; wherein the first working mode is used to control the device to be charged to feed back electrical energy to an external power source.

[0153] In the embodiment of the present application, if the device to be charged has a V2G requirement, the device to be charged can be used as an energy storage unit to provide electric energy to the AC power grid. Here, whether the device to be charged has a V2G requirement is determined by the device to be charged itself. If the device to be charged has a V2G requirement, a message with a V2G request is received from the device to be charged, and then the storage-charging integrated device is controlled to enter the first working mode, so that the device to be charged feeds back electric energy to the external power (such as the AC power grid).

[0154] In the embodiment of the present application, after the storage-charging device enters the first working mode, it is necessary to determine whether the storage-charging device has reached the first stop condition or the V2G stop condition. Here, if the storage-charging device reaches the first stop condition or the V2G stop condition, the device to be charged stops feeding back electric energy to the AC power grid, thereby avoiding safety hazards caused by failures of the device to be charged, thereby improving the safety of charging.

[0155] Thus, in the embodiment of the present application, when it is detected that the integrated storage and charging device establishes a communication connection with the device to be charged, if it is determined that the device to be charged has V2G requirements based on the charging requirement information of the device to be charged, the device to be charged can be controlled to feed back electric energy to the external power, which can reduce the peak load and fill the valley load of the external power, thereby improving the utilization rate of electric energy.

[0156] In some embodiments, Figure 6 As shown, the charging control method also includes:

[0157] S601: When the device to be charged does not have a V2G requirement, determine whether the energy storage module meets a first preset condition according to the power supply capability information of the energy storage module.

[0158] In the embodiment of the present application, if the device to be charged does not have a V2G requirement, the integrated storage and charging device can charge the device to be charged. When the integrated storage and charging device charges the device to be charged, it can first determine whether the energy storage module meets the first preset condition to determine whether the device to be charged is charged by external power or by external power and the energy storage module together.

[0159] In an embodiment of the present application, the power supply capacity information of the energy storage module may be the SOC of the energy storage module or the energy state (SOE) of the energy storage module, and no specific limitation is made to this. In addition, the first preset condition is used to characterize the state parameter requirements of the energy storage module for charging the device to be charged. Exemplarily, if the SOC of the energy storage module is greater than the first power threshold, the energy storage module satisfies the first preset condition; if the SOC of the energy storage module is less than the first power threshold, the energy storage module does not meet the first preset condition; if the SOC of the energy storage module is equal to the first power threshold, it can be considered that the energy storage module does not meet the first preset condition, or it can be considered that the energy storage module meets the first preset condition, and no specific limitation is made to this.

[0160] In another example, if the SOE of the energy storage module is greater than the first energy threshold, the energy storage module meets the first preset condition; if the SOE of the energy storage module is less than the first energy threshold, the energy storage module does not meet the first preset condition. If the SOH of the energy storage module is equal to the first energy threshold, it can be considered that the energy storage module does not meet the first preset condition, or it can be considered that the energy storage module meets the first preset condition, without specific limitation;

[0161] It should be noted that the first power threshold and the first energy threshold can be determined based on the charging demand power of the device to be charged and the first charging power of the DC conversion module, or based on the power supply capacity information of the energy storage module itself, and there is no specific limitation on this.

[0162] S602: When the energy storage module meets the first preset condition, determine that the integrated storage and charging device enters the second working mode.

[0163] In the embodiment of the present application, if the energy storage module meets the first preset condition, the energy storage module and the external power can be controlled to charge the device to be charged.

[0164] In some embodiments, after the integrated storage and charging device enters the second operating mode, the charging control method further includes: when it is detected that the integrated storage and charging device meets the stop condition of the second operating mode, determining that the integrated storage and charging device enters the third operating mode.

[0165] In the embodiment of the present application, when it is detected that the integrated storage and charging device reaches the stop condition of the second working mode (i.e., the second stop condition), that is, the energy storage module has a fault such as overtemperature or overcurrent, the AC power grid can be controlled to charge the device to be charged alone, avoiding safety problems caused by faults in the energy storage module, thereby improving charging safety.

[0166] In an embodiment of the present application, when the device to be charged does not have a V2G requirement, that is, the device to be charged needs to be charged, during the charging process of the device to be charged, it is necessary to detect whether the SOC of the device to be charged is greater than or equal to the required power of the device to be charged. If the SOC of the device to be charged is greater than or equal to the required power of the device to be charged, the storage-charging device stops charging the device to be charged.

[0167] S603: When the energy storage module does not meet the first preset condition, determine that the integrated storage and charging device enters the third working mode.

[0168] In the embodiment of the present application, if the energy storage module does not meet the first preset condition, the external power is used to charge the device to be charged alone.

[0169] It should be noted that after the integrated storage and charging device enters the second working mode, it is necessary to determine whether the integrated storage and charging device meets the second stop condition or the charging cut-off condition. When the integrated storage and charging device enters the third working mode, it is necessary to determine whether the integrated storage and charging device meets the third stop condition or the charging cut-off condition. If it is determined that the integrated storage and charging device meets the corresponding stop condition or the charging cut-off condition, the integrated storage and charging device is stopped to charge the device to be charged.

[0170] It should also be noted that when the integrated storage and charging device enters the third working mode and charges the device to be charged, it is necessary to determine whether the SOC of the device to be charged is greater than or equal to the required power of the device to be charged, for example, if the device to be charged is fully charged, then stop charging the device to be charged.

[0171] In an embodiment of the present application, if it is determined based on the charging demand information of the device to be charged that the device to be charged does not have the V2G demand, then it can be determined whether the energy storage module meets the first preset condition, that is, whether the power of the energy storage module is sufficient, and whether to combine external power to power the device to be charged is selected based on the actual situation of the energy storage module, so as to avoid safety problems caused by over-discharge of the energy storage module, thereby improving charging safety; and the small power provided by the external power 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.

[0172] It should also be noted that in the present application, if the device to be charged needs to be charged and if the external power supply load is in an overload state, then an energy storage module can be used to charge the device to be charged alone.

[0173] In a specific embodiment, the integrated storage and charging device also includes a third switch and a fourth switch, and the charging control method also includes: when the integrated storage and charging device is in the first working mode, in response to the third control signal sent by the control module, the first switch and the fourth switch are controlled to be in the on state and the second switch and the third switch are in the off state; when the integrated storage and charging device is in the second working mode, in response to the fourth control signal sent by the control module, the third switch is controlled to be in the on state and the first switch, the second switch and the fourth switch are in the off state; when the integrated storage and charging device is in the third working mode, in response to the fifth control signal sent by the control module, the first switch and the fourth switch are controlled to be in the on state and the second switch and the third switch are in the off state; wherein the third switch is connected in series between the first output end of the DC conversion module and the second output end of the energy storage module, and the fourth switch is connected in series between the second input end of the DC conversion module and the second input end of the charging module.

[0174] In this way, in the embodiment of the present application, by controlling the on and off states of the first switch, the second switch, the third switch and the fourth switch to match the working mode of the integrated storage and charging device, charging can be performed according to the actual conditions of the external power, the integrated storage and charging device and the equipment to be charged, thereby improving the storage and charging flexibility of the integrated storage and charging device.

[0175] In another embodiment of the present application, the charging control method also includes: when it is detected that the integrated storage and charging device has not established a communication connection with the device to be charged, determining to charge the energy storage module based on the output power of the external power, or to feed back electric energy to the external power based on the output power of the energy storage module.

[0176] In some embodiments, when it is detected that no communication connection is established between the integrated storage and charging device and the device to be charged, the charging control method further includes: when it is determined that the power supply load of the external power is greater than a preset load threshold, controlling the integrated storage and charging device to enter a fourth operating mode; wherein the fourth operating mode is used to control the energy storage module to feed back electrical energy to the external power.

[0177] In the embodiment of the present application, the preset load threshold can be used to characterize the power supply load threshold of the external power under normal conditions. For example, the external power is an AC power grid. If the storage-charging integrated device has not established a communication connection with the device to be charged, and if the power supply load of the AC power grid is greater than the preset threshold, the AC power grid is in an overload state. The energy storage module is used to feed back electric energy to the AC power grid, which plays a role in peak shaving and valley filling for the AC power grid.

[0178] In an embodiment of the present application, after the storage-charging device enters the fourth working mode, it is also necessary to determine whether the storage-charging device has reached the fourth stop condition. If the storage-charging device has reached the fourth stop condition, the energy storage module may be faulty at this time, and the energy storage module is stopped from feeding back electric energy to the power grid, thereby improving the charging safety. In addition, it is also necessary to determine whether the power of the energy storage module is sufficient. If it is not sufficient, the energy storage module is also stopped from feeding back electric energy to the power grid, thereby avoiding safety problems caused by over-discharge of the energy storage module, thereby improving the charging safety. It should be noted that after the energy storage module stops feeding back electric energy to the power grid, the step of detecting whether a communication connection is established between the storage-charging device and the device to be charged is performed to charge the device to be charged.

[0179] Thus, in the embodiment of the present application, when it is detected that the integrated storage and charging device has not established a communication connection with the device to be charged, if the power supply load of the external power is greater than the preset load threshold, the energy storage module can be controlled to feed back electric energy to the external power, thereby achieving an energy balance between the energy storage module and the external power, and playing the role of peak shaving and valley filling for the external power, thereby improving the utilization rate of electric energy.

[0180] In some embodiments, when it is detected that no communication connection is established between the integrated storage and charging device and the device to be charged, the charging control method further includes: determining whether the energy storage module meets a second preset condition based on the power supply capacity information of the energy storage module; when the energy storage module does not meet the second preset condition, controlling the integrated storage and charging device to enter a fifth working mode; wherein the fifth working mode is used to control external power to charge the energy storage module.

[0181] In an embodiment of the present application, the second preset condition is used to characterize whether the power supply capacity information of the energy storage module meets the power supply requirement condition for feeding back electric energy to the power grid. Exemplarily, the SOC of the energy storage module is greater than the second power threshold, at which time the energy storage module meets the second preset condition, and the SOC of the energy storage module is less than the second power threshold, at which time the energy storage module does not meet the second preset condition; for the SOC of the energy storage module is equal to the second power threshold, at this time it can be considered that the energy storage module does not meet the second preset condition, or it can be considered that the energy storage module meets the second preset condition, and no specific limitation is made to this. Another example, the SOE of the energy storage module is greater than the second energy threshold, at which time the energy storage module meets the second preset condition, and the SOE of the energy storage module is less than the second energy threshold, at this time the energy storage module does not meet the second preset condition.

[0182] In this way, when it is detected that the integrated storage and charging device has not established a communication connection with the device to be charged, if it is determined based on the power supply energy information of the energy storage module that the energy storage module does not meet the preset second preset condition, that is, the power of the energy storage module is low, then the external power can be controlled to charge the energy storage module, which can store more electrical energy for the energy storage module and improve the utilization rate of electrical energy.

[0183] In a specific embodiment, see the aforementioned Figure 3 , the integrated storage and charging device also includes a fifth switch and a sixth switch; wherein the fifth switch is connected in series between the second output terminal of the DC conversion module and the second input terminal of the charging module, and the sixth switch is connected in series between the first output terminal of the energy storage module and the first input terminal of the charging module. Accordingly, the charging control method also includes: when the integrated storage and charging device is in the fourth working mode, in response to the sixth control signal sent by the control module, controlling the first switch and the second switch to be in the on state and the third switch, the fourth switch, the fifth switch and the sixth switch to be in the off state; when the integrated storage and charging device is in the fifth working mode, in response to the seventh control signal sent by the control module, controlling the first switch and the second switch to be in the on state and the third switch, the fourth switch, the fifth switch and the sixth switch to be in the off state.

[0184] Thus, in the embodiment of the present application, by controlling the first switch and the second switch to be in the on state and controlling the third switch, the fourth switch, the fifth switch and the sixth switch to be in the off state, so as to match the fourth working mode or the fifth working mode of the storage-charging integrated device, the charging selection can be made according to the actual situation of the external power and the storage-charging integrated device, such as the external power supplies power to the energy storage module, or the energy storage module feeds back power to the external power, thereby improving the flexibility of charging; and it can also balance the power between the energy storage module and the external power, thus playing the role of peak shaving and valley filling. In addition, the switch can be turned off when charging is not needed to reduce energy waste.

[0185] In some embodiments, when the energy storage module meets the second preset condition, or the integrated storage and charging device reaches the stop condition corresponding to the fifth working mode, the step of detecting whether a communication connection is established between the integrated storage and charging device and the device to be charged is continued.

[0186] That is to say, in the embodiment of the present application, if the energy storage module meets the second preset condition, that is, the energy storage module has sufficient power, or if the integrated storage and charging device reaches the stop condition corresponding to the fifth working mode, for example, the energy storage module has a fault such as overtemperature or overcurrent, then the AC power grid is stopped from charging the energy storage module, and the step of detecting whether a communication connection is established between the integrated storage and charging device and the device to be charged is executed, thereby improving charging safety.

[0187] In yet another embodiment of the present application, based on the charging control method of the above embodiment, Figure 7 A detailed flow chart of a charging control method provided in an embodiment of the present application. Here, the storage-charging integrated device includes an energy storage module, a DC conversion module, and a charging module, and the charging module may include a charging gun. The energy storage module may be called an energy storage battery, and the external power may be an AC power grid. Figure 7 As shown, the detailed process may include:

[0188] S701, standby, detect charging gun signal.

[0189] S702: Is the device to be charged connected to the charging gun and is a communication connection established between the storage-charging device and the device to be charged?

[0190] S703, is there a need for energy storage batteries to feed back electricity to the grid?

[0191] S704, the integrated storage and charging device enters the fourth working mode, and the energy storage battery feeds back electric energy to the AC power grid.

[0192] S705: Does the integrated storage-charging device meet the fourth stop condition?

[0193] S706, Is the SOC ≥ t1% or SOE ≥ t2% of the energy storage battery?

[0194] In the embodiment of the present application, t1 is the first power threshold, and t2 is the first energy threshold. Exemplarily, t1=60, t2=60.

[0195] S707, the integrated storage-charging device enters the fifth working mode, and the AC power grid charges the energy storage battery.

[0196] S708: Does the integrated storage and charging device meet the fifth stop condition?

[0197] S709: Does the device to be charged have V2G requirements?

[0198] S710, Is the SOC ≥ q% or SOE ≥ p% of the energy storage battery?

[0199] In the embodiment of the present application, q is the second power threshold, and p is the second energy threshold. For example, q=50, p=50.

[0200] S711, the integrated storage and charging device enters the second working mode, and the AC power grid and the energy storage battery jointly charge the device to be charged.

[0201] S712: Does the integrated storage and charging device reach the second stop condition?

[0202] S713: Does the integrated storage-charging device meet the charging cut-off condition?

[0203] S714, the integrated storage and charging device enters the third working mode, and the AC power grid charges the device to be charged.

[0204] S715: Does the integrated storage-charging device reach the third stop condition or the charging cut-off condition?

[0205] S716, the integrated storage-charging device enters the third working mode, and the AC power grid charges the device to be charged.

[0206] S717: Does the integrated storage-charging device reach the third stop condition or the charging cut-off condition?

[0207] S718, the integrated storage and charging device enters the first working mode, and the electric vehicle feeds electric energy back to the AC power grid.

[0208] S719: Does the integrated storage and charging device reach the first stop condition or the V2G stop condition?

[0209] In the embodiment of the present application, if the judgment result of step S702 indicates yes, execute step S709; if the judgment result of step S702 indicates no, execute step S703; if the judgment result of step S703 indicates yes, execute step S704; if the judgment result of step S703 indicates no, execute step S706; if the judgment result of step S705 indicates yes, execute step S706; if the judgment result of step S703 indicates no, execute step S704; if the judgment result of step S706 indicates yes, execute step S701; if the judgment result of step S706 indicates no, execute step S707; if the judgment result of step S708 indicates yes, execute step S701; if the judgment result of step S708 indicates no, execute step S707; if the judgment result of step S709 indicates yes, execute step S709; If the result of step S709 indicates yes, execute step S711; if the result of step S712 indicates yes, execute step S713; if the result of step S712 indicates no, execute step S711; if the result of step S713 indicates yes, end the process; if the result of step S713 indicates no, execute step S714; if the result of step S715 indicates yes, end the process; if the result of step S715 indicates no, execute step S714; if the result of step S717 indicates yes, end the process; if the result of step S717 indicates no, execute step S716; if the result of step S719 indicates yes, end the process; if the result of step S719 indicates no, execute step S718.

[0210] In a specific embodiment, Figure 7 The charging control method provided should be Figure 3 The storage and charging device shown.

[0211] In the embodiment of the present application, the device to be charged may be a car, which may be an electric car. Figure 3 The integrated storage and charging device describes the charging control method provided in the embodiment of the present application.

[0212] In the embodiments of the present application, Figure 3As shown, the DC conversion module 102, i.e., the isolated bidirectional DC / DC, realizes the DC positive and negative voltage output. -Ua≤U1-U2≤+Ub. Wherein, U1 is the battery voltage of the device to be charged 202, such as a car, U2 is the voltage of the energy storage module 101 inside the storage-charging device 10, -Ua is the negative voltage limit of the DC / DC output, and +Ub is the positive voltage limit of the DC / DC output. This method can adapt to the battery voltages of more cars without considering the battery voltage range of the car.

[0213] (1) The first working mode is a working mode in which the vehicle feeds back electric energy to the AC power grid. Specifically, when the V2G function is implemented, the vehicle feeds back electric energy to the AC power grid. It is necessary to disconnect the second switch K2 and the third switch K3, and close the first switch K1, the fourth switch K4, the fifth switch K5 and the sixth switch K6, so that the vehicle feeds back electric energy to the power grid.

[0214] (2) The second working mode is a working mode in which the energy storage module and the AC power grid jointly charge the car. Specifically, when the storage-charging device 10 charges the car, it is necessary to disconnect the first switch K1, the second switch K2 and the fourth switch K4, and close the third switch K3, the fifth switch K5 and the sixth switch K6; when U1-U2≥0V, the DC / DC working state is a positive polarity working state, the DC / DC outputs a positive voltage, and the storage-charging device 10 charges the car. When U1-U2<0V, the first switch K1 and the second switch K2 are closed, the DC / DC working state is a reverse polarity working state, the DC / DC outputs a negative voltage, and the power of the DC / DC is fed back to the bus of the energy storage module 101 through the first switch K1 and the second switch K2, and the storage-charging device 10 charges the car.

[0215] (3) The third working mode is a working mode in which the AC power grid charges the car alone. Specifically, when the storage-charging device 10 charges the car and the energy storage module 101 inside the storage-charging device 10 is insufficient, the AC power grid charges the car alone. It is necessary to disconnect the second switch K2 and the third switch K3, and close the first switch K1, the fourth switch K4, the fifth switch K5 and the sixth switch K6. The AC power grid charges the car alone.

[0216] (4) The fourth working mode is a working mode in which the energy storage module 101 feeds back electric energy to the AC power grid. Specifically, when the energy storage device feeds back electric energy to the power grid (i.e., V2G) is implemented, the third switch K3, the fourth switch K4, the fifth switch K5, and the sixth switch K6 need to be disconnected, and the first switch K1 and the second switch K2 need to be closed, so that the energy storage module 101 inside the storage-charging device 10 feeds back electric energy to the AC power grid.

[0217] (5) The fifth working mode is a working mode in which the AC power grid charges the energy storage module. Specifically, when there is no car charging, only the AC power grid 201 supplies energy to the energy storage module 101 inside the storage-charging integrated device 10. In this case, the third switch K3, the fourth switch K4, the fifth switch K5 and the sixth switch K6 need to be disconnected, and the first switch K1 and the second switch K2 need to be closed. The AC power grid charges the energy storage module 101 alone.

[0218] The present application provides a charging control method for Figure 3 The integrated storage and charging device can achieve high-power output to the device to be charged based on the small-power input of the AC power grid, which not only reduces the cost and volume of the integrated storage and charging device, but also improves the charging flexibility, which is conducive to the rapid charging of the device to be charged.

[0219] Based on the same inventive concept as the above embodiments, Figure 8 This is a schematic diagram of the structure of a charging control device provided in an embodiment of the present application. Figure 8 As shown, the charging control device 80 may include a determining unit 801 and a charging unit 802, wherein:

[0220] The determination unit 801 is configured to determine the power supply capacity information of the energy storage module and the DC conversion module in the storage-charging integrated device and the charging requirement information of the device to be charged; and determine the working state of the DC conversion module according to the power supply capacity information of the energy storage module and the DC conversion module and the charging requirement information of the device to be charged; wherein the working state includes a positive polarity working state and a reverse polarity working state;

[0221] The charging unit 802 is configured to control the charging module in the storage-charging integrated device to charge the device to be charged according to the working state of the DC conversion module;

[0222] Among them, the integrated storage and charging device includes an energy storage module, a DC conversion module and a charging module. The DC conversion module is configured to provide the input external power to the charging module, and the DC conversion module is connected in series with the energy storage module so that the charging module can provide the required charging power to the device to be charged.

[0223] In some embodiments, the determination unit 802 is further configured to provide a first charging power to the charging module according to the power supply capacity information of the DC conversion module; provide a second charging power to the charging module according to the power supply capacity information of the energy storage module; and determine the working state of the DC conversion module according to the first charging power, the second charging power and the charging requirement information of the device to be charged.

[0224] In some embodiments, the charging unit 802 is further configured to provide the first charging power output by the DC conversion module and the second charging power output by the energy storage module to the charging module when the DC conversion module is in a positive polarity working state, and use the third charging power output by the charging module to charge the device to be charged; or, when the DC conversion module is in a reverse polarity working state, feed back the first charging power output by the DC conversion module to the energy storage module, and provide the fourth charging power output by the energy storage module to the charging module, and use the fifth charging power output by the charging module to charge the device to be charged.

[0225] In some embodiments, the storage-charging integrated device further includes a first switch and a second switch, wherein the first switch is connected in series between the first input end of the DC conversion module and the first output end of the energy storage module, and the second switch is connected in series between the second input end of the DC conversion module and the second output end of the energy storage module;

[0226] The charging unit 802 is also configured to control the first switch and the second switch to be in a disconnected state in response to a first control signal sent by the control module when the DC conversion module is in a positive polarity working state; and to control the first switch and the second switch to be in a conductive state in response to a second control signal sent by the control module when the DC conversion module is in a reverse polarity working state.

[0227] In some embodiments, when it is detected that the integrated storage and charging device has established a communication connection with the device to be charged, the determination unit 802 is also configured to determine whether the device to be charged has a vehicle-to-grid V2G demand based on the charging demand information of the device to be charged; the charging unit 802 is also configured to control the integrated storage and charging device to enter a first working mode in response to the V2G demand of the device to be charged when the device to be charged has a V2G demand; wherein the first working mode is used to control the device to be charged to feed back electrical energy to an external power source.

[0228] In some embodiments, the determination unit 801 is further configured to determine whether the energy storage module meets the first preset condition based on the power supply energy information of the energy storage module when the device to be charged does not have a V2G requirement; the charging unit 802 is further configured to control the storage-charging integrated device to enter a second working mode when the energy storage module meets the first preset condition; wherein the second working mode is used to control external power and the energy storage module to jointly charge the device to be charged; when the energy storage module does not meet the first preset condition, the storage-charging integrated device is controlled to enter a third working mode; wherein the third working mode is used to control external power to charge the device to be charged.

[0229] In some embodiments, the storage-charging device further includes a third switch and a fourth switch, the third switch is connected in series between the first output terminal of the DC conversion module and the second output terminal of the energy storage module, and the fourth switch is connected in series between the second input terminal of the DC conversion module and the second input terminal of the charging module. The charging unit 802 is further configured to, when the storage-charging device is in the first working mode, respond to the third control signal sent by the control module to control the first switch and the fourth switch to be in the on state and the second switch and the third switch to be in the off state; when the storage-charging device is in the second working mode, respond to the fourth control signal sent by the control module to control the third switch to be in the on state and the first switch, the second switch and the fourth switch to be in the off state; when the storage-charging device is in the third working mode, respond to the fifth control signal sent by the control module to control the first switch and the fourth switch to be in the on state and the second switch and the third switch to be in the off state.

[0230] In some embodiments, when it is detected that the integrated storage and charging device has not established a communication connection with the device to be charged, the charging unit 802 is also configured to control the integrated storage and charging device to enter a fourth operating mode when it is determined that the power supply load of the external power is greater than a preset load threshold; wherein the fourth operating mode is used to control the energy storage module to feed back electrical energy to the external power.

[0231] In some embodiments, the storage-charging device further includes a fifth switch and a sixth switch, the fifth switch is connected in series between the second output terminal of the DC conversion module and the second input terminal of the charging module, and the sixth switch is connected in series between the first output terminal of the energy storage module and the first input terminal of the charging module. The charging unit 802 is further configured to control the first switch and the second switch to be in the on state and the third switch, the fourth switch, the fifth switch and the sixth switch to be in the off state in response to the sixth control signal sent by the control module when the storage-charging device is in the fourth working mode.

[0232] In some embodiments, when it is detected that no communication connection is established between the integrated storage and charging device and the device to be charged, the determination unit 801 is further configured to determine whether the energy storage module meets the second preset condition based on the power supply capacity information of the energy storage module; the charging unit 802 is further configured to control the integrated storage and charging device to enter the fifth working mode when the energy storage module does not meet the second preset condition; wherein the fifth working mode is used to control external power to charge the energy storage module.

[0233] In some embodiments, the charging unit 802 is also configured to control the first switch and the second switch to be in the on state and the third switch, the fourth switch, the fifth switch and the sixth switch to be in the off state in response to the seventh control signal sent by the control module when the storage-charging device is in the fifth operating mode.

[0234] In some embodiments, the charging unit 802 is also configured to stop the flow of electric energy between the energy storage module, the device to be charged and the external power when it detects that the working mode of the integrated storage and charging device meets the preset mode stop condition, or the integrated storage and charging device meets the charging cut-off condition.

[0235] In a possible implementation, the charging control device 80 may be located in the control module of the storage-charging device. Here, the control module may be located inside the storage-charging device or outside the storage-charging device, and there is no specific limitation on this; if the control module is located inside the storage-charging device, then the control module may be integrated inside the storage-charging device; if the control module is located outside the storage-charging device, then the control module and the storage-charging device are separately arranged, that is, they are independent components.

[0236] In yet another embodiment of the present application, Fig. 9 This is a schematic diagram of the structure of a charging system provided in an embodiment of the present application. Fig. 9 As shown, the charging system 90 includes a device to be charged 202 and the integrated storage-charging device 10 in the aforementioned embodiment; wherein the integrated storage-charging device 10 includes the charging control device 80 in any one of the aforementioned embodiments.

[0237] In an embodiment of the present application, the storage-charging integrated device 10 may be arranged in a charging pile, and accordingly, the charging system includes a charging pile and a device to be charged 202. Here, the charging control device 80 in the storage-charging integrated device 10 controls the storage-charging integrated device 10 to charge the device to be charged 202. Here, the device to be charged 202 may be a new energy vehicle, such as an electric car.

[0238] An embodiment of the present application provides a charging system. Since the charging system includes a charging control device, the charging power output by the DC conversion module and the charging power provided by the energy storage module are jointly provided to the charging module according to the working state of the DC conversion module, so that the charging power output by the charging module has a wider input range than the external power, and can improve the flexibility of the charging power output by the charging module, so that the range of the charging power is larger, so that voltage adaptation can be achieved with a variety of devices to be charged, thereby expanding the application scope of the integrated storage and charging device and improving the charging efficiency.

[0239] It can be understood that in this embodiment, a "unit" can be a part of a circuit, a part of a processor, a part of a program or software, etc., and of course it can also be a module, or it can be non-modular. Moreover, the components in this embodiment can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional module.

[0240] In this embodiment, if the integrated unit is implemented in the form of a software function module and is not sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this embodiment is essentially or the part that contributes to the prior art or the whole or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the method described in this embodiment. The aforementioned storage medium includes: U disk, mobile hard disk, read only memory (ROM), random access memory (RAM), disk or optical disk, etc., various media that can store program codes.

[0241] An embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by at least one processor, the steps of the charging control method described in any one of the aforementioned embodiments are implemented.

[0242] An embodiment of the present application also provides a computer program product, including a computer program or instructions, which, when executed, implements the steps of the method described in any of the aforementioned embodiments.

[0243] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, devices, equipment, or computer program products. Therefore, the present application may take the form of hardware embodiments, software embodiments, or embodiments combining software and hardware. Moreover, the present application may take 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.

[0244] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0245] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0246] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0247] 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, product 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, product or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, product or device including the element.

[0248] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0249] The methods disclosed in several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0250] The features disclosed in several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0251] The features disclosed in several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0252] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A charging control method, characterized in that: The charging control method comprises: Determine the power supply capacity information of the energy storage module and the DC conversion module in the integrated storage and charging device, as well as the charging demand information of the device to be charged; Determine the working state of the DC conversion module according to the power supply capacity information of the energy storage module and the DC conversion module and the charging requirement information of the device to be charged; wherein the working state includes a positive polarity working state and a reverse polarity working state; According to the working state of the DC conversion module, control the charging module in the storage-charging integrated device to charge the device to be charged; The storage-charging integrated device comprises the energy storage module, the DC conversion module and the charging module, the DC conversion module is configured to provide the input external power to the charging module, and the DC conversion module is connected in series with the energy storage module, so that the charging module can provide the required charging power to the device to be charged; The integrated storage and charging device further includes a first switch, a second switch, a third switch and a fourth switch, and the charging control method further includes: When the storage-charging integrated device is in the first working mode, in response to the third control signal sent by the control module, the first switch and the fourth switch are controlled to be in the on state and the second switch and the third switch are in the off state; the first working mode is used to control the device to be charged to feed back electric energy to the external power; When the storage-charging integrated device is in the second working mode, in response to a fourth control signal sent by the control module, the third switch is controlled to be in an on state and the first switch, the second switch and the fourth switch are in an off state; the second working mode is used to control the external power and the energy storage module to charge the device to be charged together; When the storage-charging integrated device is in the third working mode, in response to the fifth control signal sent by the control module, the first switch and the fourth switch are controlled to be in the on state and the second switch and the third switch are in the off state; the third working mode is used to control the external power to feed back electric energy to the device to be charged; Among them, the first switch is connected in series between the first input end of the DC conversion module and the first output end of the energy storage module, the second switch is connected in series between the second input end of the DC conversion module and the second output end of the energy storage module, the third switch is connected in series between the first output end of the DC conversion module and the second output end of the energy storage module, and the fourth switch is connected in series between the second input end of the DC conversion module and the second input end of the charging module.

2. The charging control method according to claim 1, characterized in that: The determining the working state of the DC conversion module according to the power supply capability information of the energy storage module and the DC conversion module and the charging requirement information of the device to be charged includes: Providing a first charging power to the charging module according to the power supply capability information of the DC conversion module; Providing a second charging power to the charging module according to the power supply capability information of the energy storage module; The working state of the DC conversion module is determined according to the first charging power, the second charging power and the charging requirement information of the device to be charged.

3. The charging control method according to claim 2, characterized in that: According to the working state of the DC conversion module, controlling the charging module in the storage-charging integrated device to charge the device to be charged includes: When the DC conversion module is in a positive polarity working state, the first charging power output by the DC conversion module and the second charging power output by the energy storage module are provided to the charging module, and the third charging power output by the charging module is used to charge the device to be charged; or, When the DC conversion module is in the reverse polarity working state, the first charging power output by the DC conversion module is fed back to the energy storage module, and the fourth charging power output by the energy storage module is provided to the charging module, and the fifth charging power output by the charging module is used to charge the device to be charged.

4. The charging control method according to claim 3, characterized in that: The charging control method further includes: When the DC conversion module is in a positive polarity working state, in response to a first control signal sent by the control module, the first switch and the second switch are controlled to be in a disconnected state; When the DC conversion module is in the reverse polarity working state, in response to the second control signal sent by the control module, the first switch and the second switch are controlled to be in the on state.

5. The charging control method according to claim 4, characterized in that: In the case where it is detected that the integrated storage and charging device establishes a communication connection with the device to be charged, the charging control method further includes: Determining whether the device to be charged has a vehicle-to-grid (V2G) demand according to the charging demand information of the device to be charged; When the device to be charged has a V2G demand, in response to the V2G demand of the device to be charged, the integrated storage-charging device is controlled to enter a first working mode.

6. The charging control method according to claim 5, characterized in that: The charging control method further includes: When the device to be charged does not have a V2G requirement, determining whether the energy storage module meets a first preset condition according to the power supply capability information of the energy storage module; When the energy storage module meets the first preset condition, controlling the storage-charging integrated device to enter the second working mode; When the energy storage module does not meet the first preset condition, the integrated storage and charging device is controlled to enter a third working mode.

7. The charging control method according to claim 6, characterized in that: When it is detected that the integrated storage-charging device has not established a communication connection with the device to be charged, the charging control method further includes: When it is determined that the power supply load of the external power is greater than a preset load threshold, the integrated storage and charging device is controlled to enter a fourth working mode; wherein the fourth working mode is used to control the energy storage module to feed back electric energy to the external power.

8. The charging control method according to claim 7, characterized in that: The integrated storage and charging device further includes a fifth switch and a sixth switch, and the charging control method further includes: When the integrated storage and charging device is in the fourth working mode, in response to a sixth control signal sent by the control module, the first switch and the second switch are controlled to be in the on state and the third switch, the fourth switch, the fifth switch and the sixth switch are controlled to be in the off state; The fifth switch is connected in series between the second output end of the DC conversion module and the second input end of the charging module, and the sixth switch is connected in series between the first output end of the energy storage module and the first input end of the charging module.

9. The charging control method according to claim 8, characterized in that: When it is detected that the integrated storage-charging device has not established a communication connection with the device to be charged, the charging control method further includes: Determining whether the energy storage module meets a second preset condition according to the power supply capacity information of the energy storage module; When the energy storage module does not meet the second preset condition, the integrated storage and charging device is controlled to enter a fifth working mode; wherein the fifth working mode is used to control the external power to charge the energy storage module.

10. The charging control method according to claim 9, characterized in that: The charging control method further includes: When the integrated storage and charging device is in the fifth working mode, in response to the seventh control signal sent by the control module, the first switch and the second switch are controlled to be in the on state and the third switch, the fourth switch, the fifth switch and the sixth switch are in the off state.

11. The charging control method according to any one of claims 1 to 10, characterized in that: The charging control method further includes: When it is detected that the working mode of the integrated storage and charging device meets the preset mode stop condition or the integrated storage and charging device meets the charging cut-off condition, the flow of electric energy between the energy storage module, the device to be charged and the external power is stopped.

12. A charging control device, characterized in that: The charging control device comprises a determining unit and a charging unit, wherein: The determination unit is configured to determine the power supply capacity information of the energy storage module and the DC conversion module in the storage-charging integrated device and the charging requirement information of the device to be charged; determine the working state of the DC conversion module according to the power supply capacity information of the energy storage module and the DC conversion module and the charging requirement information of the device to be charged; wherein the working state includes a positive polarity working state and a reverse polarity working state; The charging unit is configured to control the charging module in the storage-charging integrated device to charge the device to be charged according to the working state of the DC conversion module; The storage-charging integrated device comprises an energy storage module, a DC conversion module and a charging module, wherein the DC conversion module is configured to provide the input external power to the charging module, and the DC conversion module is connected in series with the energy storage module so that the charging module can provide the required charging power to the device to be charged; The storage-charging integrated device further includes a first switch, a second switch, a third switch and a fourth switch, and the charging unit is further configured as: When the storage-charging integrated device is in the first working mode, in response to the third control signal sent by the control module, the first switch and the fourth switch are controlled to be in the on state and the second switch and the third switch are in the off state; the first working mode is used to control the device to be charged to feed back electric energy to the external power; When the storage-charging integrated device is in the second working mode, in response to a fourth control signal sent by the control module, the third switch is controlled to be in an on state and the first switch, the second switch and the fourth switch are in an off state; the second working mode is used to control the external power and the energy storage module to charge the device to be charged together; When the storage-charging integrated device is in the third working mode, in response to the fifth control signal sent by the control module, the first switch and the fourth switch are controlled to be in the on state and the second switch and the third switch are in the off state; the third working mode is used to control the external power to feed back electric energy to the device to be charged; Among them, the first switch is connected in series between the first input end of the DC conversion module and the first output end of the energy storage module, the second switch is connected in series between the second input end of the DC conversion module and the second output end of the energy storage module, the third switch is connected in series between the first output end of the DC conversion module and the second output end of the energy storage module, and the fourth switch is connected in series between the second input end of the DC conversion module and the second input end of the charging module.

13. A charging system, characterized in that: The charging system includes a device to be charged and an integrated storage and charging device; wherein the integrated storage and charging device includes the charging control device as described in claim 12.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the method according to any one of claims 1 to 11 is implemented.

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