Integrated storage and charging apparatus, charging control method, charging pile, and charging system

Abstract

Disclosed in the present application are an integrated storage and charging apparatus, a charging control method, a charging pile and a charging system. The integrated storage and charging apparatus comprises an energy storage module, a direct current conversion module and a charging module; an input end of the direct current conversion module is configured to receive a first charging power input externally, a first output end of the direct current conversion module is connected to a first end of the charging module, and a second output end of the direct current conversion module is connected to a first end of the energy storage module; a second end of the charging module is connected to a second end of the energy storage module, and the charging module is connected in series to the direct current conversion module and the energy storage module, and is configured to output or receive electric energy to a device to be charged. Thus, voltage adaptation can be achieved between the integrated storage and charging apparatus and various devices to be charged, thereby expanding the application range of the storage and charging integrated apparatus and improving the charging efficiency.

Description

Integrated energy storage and charging device, charging control method, charging pile and charging system

[0001] Cross-reference to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202411650040.0, filed on November 18, 2024, entitled “Integrated Storage and Charging Device, Charging Control Method, Charging Pile and Charging System”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of charging technology, and in particular to an integrated energy storage and charging device, a charging control method, a charging pile, and a charging system. Background Technology

[0004] Currently, with the rapid growth of the new energy vehicle market, the construction of charging infrastructure has become particularly important. Among the many charging solutions, integrated energy storage and charging units, which combine energy storage systems and charging functions, have become the preferred choice for many charging stations.

[0005] The integrated energy storage and charging machine can charge new energy vehicles through its internal energy storage battery. However, the output voltage of the energy storage battery is fixed, and its output voltage is difficult to match with the charging voltage of various new energy vehicles, which reduces the charging efficiency. Summary of the Invention

[0006] This disclosure mainly provides an integrated energy storage and charging device, a charging control method, a charging pile, and a charging system, which enables the integrated energy storage and charging device to achieve voltage compatibility with various devices to be charged, thereby expanding the application range of the integrated energy storage and charging device and improving charging efficiency.

[0007] The technical solution disclosed herein is implemented as follows:

[0008] In a first aspect, embodiments of this disclosure provide an integrated energy storage and charging device, which includes an energy storage module, a DC-DC conversion module, and a charging module; wherein:

[0009] The input terminal of the DC-DC converter module is configured to receive the first charging power input from an external source;

[0010] The first output terminal of the DC-DC converter module is connected to the first terminal of the charging module, the second output terminal of the DC-DC converter module is connected to the first terminal of the energy storage module, and the second terminal of the charging module is connected to the second terminal of the energy storage module.

[0011] The charging module is connected in series with the DC-DC conversion module and the energy storage module, and is configured to output or receive electrical energy to the device to be charged.

[0012] Through the aforementioned technical means, the DC-DC converter converts the externally input first charging power and, based on the structure of the charging module, energy storage module, and DC-DC converter connected in series, provides charging output or receives electrical energy to the device to be charged. Thus, because the charging power output by the DC-DC converter adjusts the charging power provided by the energy storage module, the charging power output by the charging module has a wider range than the first charging power and is more flexible than the charging power output by the energy storage module. It can achieve voltage adaptation with various devices to be charged, thereby expanding the applicability of the integrated charging and energy storage device.

[0013] In some embodiments, the positive terminal of the energy storage module is connected to the negative terminal of the DC-DC converter, and the negative terminal of the energy storage module is connected to the negative terminal of the charging module; or, the negative terminal of the energy storage module is connected to the positive terminal of the DC-DC converter, and the positive terminal of the energy storage module is connected to the positive terminal of the charging module.

[0014] Using the aforementioned technical methods, the energy storage module can be located on either the positive or negative side of the DC-DC conversion module. This improves the flexibility of module placement in the integrated energy storage and charging device.

[0015] In some embodiments, the integrated energy storage and charging device further includes an AC / DC conversion module; wherein: the input terminal of the AC / DC conversion module is connected to the AC power grid; the first terminal of the energy storage module is connected to the first output terminal of the AC / DC conversion module, the first input terminal of the DC conversion module, and the second output terminal of the DC conversion module respectively; the second terminal of the energy storage module is connected to the second output terminal of the AC / DC conversion module and the second input terminal of the DC conversion module respectively; the AC / DC conversion module is configured to provide a first charging power to the DC conversion module.

[0016] Through the aforementioned technical means, the energy storage module is connected to both the AC / DC conversion module and the DC conversion module. This enables the DC conversion module to output voltage bidirectionally to the energy storage module, thereby adjusting the output power of the charging module and expanding the voltage compatibility range of the integrated energy storage and charging device for the devices being charged.

[0017] In some embodiments, the integrated energy storage and charging device further includes a first switch module and a second switch module. The first switch module includes a first switch and a second switch, and the second switch module includes a third switch, a fourth switch, and a fifth switch. The first switch is connected in series between the second input terminal of the DC-DC converter module and the second terminal of the energy storage module. The second switch is connected in series between the first input terminal of the DC-DC converter module and the first terminal of the energy storage module. The third switch is connected in series between the first output terminal of the DC-DC converter module and the first input terminal of the charging module. The fourth switch is connected in series between the second terminal of the energy storage module and the second input terminal of the charging module. The fifth switch is connected in series between the second output terminal of the DC-DC converter module and the first terminal of the energy storage module.

[0018] By employing the aforementioned technical means, and controlling the on / off states of the switches in the first and second switching modules, the DC-DC conversion module, together with the energy storage module, charges the device to be charged, based on its operating status. This also controls whether the integrated energy storage and charging device charges the device and whether the AC grid charges the energy storage module. In this way, not only is the power range applicable to the device to be charged broadened, but the switches can also be turned off when charging is not needed, reducing energy waste.

[0019] In some embodiments, the integrated energy storage and charging device further includes a third switch module, which includes a sixth switch; one end of the sixth switch is connected to the first output terminal of the AC / DC conversion module, and the other end of the sixth switch is connected to one end of the third switch.

[0020] Through the aforementioned technical means, the integrated energy storage and charging device is controlled to charge the device to be charged by turning on or off the switches in the third switching module, or to achieve vehicle-to-grid (V2G) functionality based on the device to be charged connecting to the AC power grid. This allows charging to be performed according to the actual conditions of the integrated energy storage and charging device and the device to be charged, improving charging flexibility.

[0021] In some embodiments, the energy storage module includes at least one energy storage unit; wherein: at least one energy storage unit is connected in series and / or in parallel between a first end and a second end of the energy storage module to provide a third charging power.

[0022] Through the above-mentioned technical means, the energy storage module includes multiple energy storage units connected in series and / or in parallel. Thus, due to the modularity of the energy storage units, energy storage units can be added or removed freely, which facilitates the rapid connection and removal of energy storage units and improves the charging flexibility of the integrated energy storage and charging device.

[0023] In some embodiments, each energy storage unit includes an energy storage battery, and each energy storage unit is configured to provide a fifth charging power based on the electrical energy of the energy storage battery; wherein the fifth charging power is less than or equal to a third charging power.

[0024] Through the above-mentioned technical means, each energy storage unit includes at least one energy storage battery, thereby enabling control of the output power of the integrated energy storage and charging device to meet the charging needs of different devices to be charged.

[0025] In some embodiments, at least a portion of the energy storage units in at least one energy storage unit includes a fourth switching module connected in series between a first terminal of the respective energy storage unit and a second output terminal of the AC / DC conversion module.

[0026] By employing the aforementioned technical means, and controlling the switching state of the fourth switching module, the number of energy storage units connected in series in the integrated energy storage and charging device can be controlled. This allows for flexible selection of the number of connected energy storage units based on the charging power requirements of the device to be charged, improving charging flexibility and expanding the range of charging power output from the integrated energy storage and charging device.

[0027] In some embodiments, the integrated storage and charging device further includes a control module; wherein: the control module is connected to the first switch module, the second switch module, the third switch module and the fourth switch module, and the control module is configured to send drive signals to the first switch module, the second switch module, the third switch module and the fourth switch module; wherein, the drive signals are used to control the on and off states of the first switch module, the second switch module, the third switch module and the fourth switch module.

[0028] Through the aforementioned technical means, the control module controls the on / off state of each switch module, enabling the integrated energy storage and charging device to perform different functions. This improves the convenience and safety of controlling the integrated energy storage and charging device.

[0029] In some embodiments, the integrated storage and charging device further includes a communication module; the communication module is connected to the control module; wherein: the control module is configured to acquire the status parameters of the integrated storage and charging device and send the status parameters of the integrated storage and charging device to the communication module; the communication module is configured to receive the status parameters of the integrated storage and charging device and forward them to the cloud platform.

[0030] Through the aforementioned technical means, the communication module feeds back the status parameters collected by the control module to the cloud platform. This allows for timely storage and charging of the integrated storage and charging device's operational data, and also enables monitoring of the device's operational status, thus improving its operational reliability.

[0031] In some embodiments, the AC / DC conversion module is a bidirectional AC / DC module, and the DC conversion module is a bidirectional DC / DC module.

[0032] Through the aforementioned technical means, the AC / DC conversion module is a bidirectional AC-DC module, and the DC conversion module is a bidirectional DC-DC module. This enables bidirectional energy exchange between the integrated energy storage and charging device and the AC power grid. The integrated energy storage and charging device can not only charge the devices to be charged but also feed energy back to the grid, which helps to smooth peak and valley loads, improve grid stability, and increase energy utilization.

[0033] In some embodiments, the voltage difference between the first voltage value of the device to be charged and the second voltage value of the energy storage module is less than or equal to a first preset value.

[0034] Through the above-mentioned technical means, the voltage difference between the first voltage value of the device to be charged and the second voltage value of the energy storage module is less than or equal to the first preset value. In this way, high power output to the device to be charged can be achieved, the size of the integrated energy storage and charging device is reduced, and the charging flexibility is improved.

[0035] Secondly, embodiments of this disclosure provide a charging control method, wherein the integrated energy storage and charging device includes an energy storage module, a DC-DC conversion module, and a charging module; the method includes:

[0036] The DC-DC converter receives the first charging power from an external input and outputs the third charging power through the energy storage module;

[0037] Based on the first voltage value of the device to be charged and the second voltage value of the energy storage module, the operating state of the DC-DC conversion module is determined, and the first charging power is converted into the second charging power based on the operating state; wherein, the operating state includes positive polarity operating state and reverse polarity operating state;

[0038] The second and third charging powers are provided to the charging module for charging output, and the fourth charging power output from the charging module is provided to the device to be charged for charging.

[0039] Through the aforementioned technical means, the DC-DC converter converts the first charging power input from the outside and outputs a second charging power based on its operating state. The charging module then further charges the device by combining the second charging power with the third charging power provided by the energy storage module, thus providing a fourth charging power to the device being charged. In this way, because the second charging power output by the DC-DC converter adjusts the third charging power provided by the energy storage module, the fourth charging power output by the charging module has a wider range than the second charging power and is more flexible than the third charging power output by the energy storage module. This allows for voltage adaptation to various devices, thereby expanding the applicability of the integrated charging and energy storage device.

[0040] In some embodiments, the integrated energy storage and charging device further includes a first switching module; the method further includes: when the first switching module is in the on state, the DC-DC conversion module operates in a reverse polarity state, and the second charging power provided by the DC-DC conversion module is fed back to the energy storage module, so that the charging module can charge the device to be charged based on the third charging power provided by the energy storage module; or, when the first switching module is in the off state, the DC-DC conversion module operates in a positive polarity state, so that the charging module can charge the device to be charged based on the second charging power provided by the DC-DC conversion module and the third charging power provided by the energy storage module.

[0041] By using the above-mentioned technical means, the first switch module is controlled to be turned on or off to match the working state of the DC-DC conversion module. This allows the second charging power provided by the DC-DC conversion module and the third charging power provided by the energy storage module to charge the device through the charging module in a superimposed or offset manner, thus broadening the applicable range of the device to be charged.

[0042] In some embodiments, the integrated energy storage and charging device further includes a second switching module; the method further includes: charging the energy storage module based on the first charging power provided by the AC-DC conversion module when the first switching module is in the on state and the second switching module is in the off state, or feeding back electrical energy to the AC grid based on the output power of the energy storage module.

[0043] Through the aforementioned technical means, when the second switching module is turned on, the energy storage module feeds back electrical energy to the AC grid, or the AC grid charges the energy storage module through the AC-DC conversion module. This achieves power balance between the energy storage module and the AC grid, effectively shaving off peak loads and filling valleys in the AC grid, thereby improving energy utilization.

[0044] In some embodiments, the first switching module includes a first switch and a second switch, and the second switching module includes a third switch, a fourth switch, and a fifth switch. The method further includes: when the first, second, third, fourth, and fifth switches are all in a conducting state, the DC-DC conversion module operates in a reverse polarity state, and the second charging power provided by the DC-DC conversion module is fed back to the energy storage module, enabling the charging module to charge the device to be charged based on the third charging power provided by the energy storage module; or, when the third, fourth, and fifth switches are in a conducting state, and the first and second switches are both in a closed state, the DC-DC conversion module operates in a positive polarity state, enabling the charging module to charge the device to be charged based on the second charging power provided by the DC-DC conversion module and the third charging power provided by the energy storage module; or, when the third, fourth, and fifth switches are all in a closed state, and the first and second switches are in a conducting state, the energy storage module is charged based on the first charging power provided by the AC-DC conversion module, or the energy storage module feeds back electrical energy to the AC grid based on its output power.

[0045] By employing the aforementioned technical means, and controlling the on / off states of the switches in the first and second switching modules, the DC-DC conversion module, together with the energy storage module, charges the device to be charged, based on its operating status. This also controls whether the integrated energy storage and charging device charges the device and whether the AC grid charges the energy storage module. In this way, not only is the power range applicable to the device to be charged broadened, but the switches can also be turned off when charging is not needed, reducing energy waste.

[0046] In some embodiments, the integrated energy storage and charging device further includes a third switch module, which includes a sixth switch; the method further includes: when the first switch, the third switch, the fourth switch and the sixth switch are all in the on state and the second switch and the fifth switch are in the off state, enabling the charging module to charge the device to be charged based on the first charging power provided by the AC-DC conversion module, or to feed back electrical energy to the AC grid based on the output power of the device to be charged.

[0047] By employing the aforementioned technical means, and controlling the on / off states of the switches in the third switching module, the integrated energy storage and charging device can be controlled to charge the device to be charged, or to enable V2G functionality between the device to be charged and the AC power grid. This allows charging to be tailored to the specific conditions of both the integrated energy storage and charging device and the device to be charged, thus improving charging flexibility.

[0048] In some embodiments, the energy storage module includes at least one energy storage unit, and at least a portion of the energy storage units in the at least one energy storage unit includes a fourth switching module; the method further includes: when the fourth switching module is in a conducting state, connecting at least one energy storage unit in the charging circuit where the second switch is located in series to provide a third charging power.

[0049] Through the above-mentioned technical means, the energy storage module includes multiple energy storage units connected in series and / or in parallel. Thus, due to the modularity of the energy storage units, energy storage units can be added or removed freely, which facilitates the rapid connection and removal of energy storage units and improves the flexibility of the fourth charging power output of the integrated energy storage and charging device.

[0050] Thirdly, embodiments of this disclosure provide a charging pile, which includes an integrated energy storage and charging device as described in any of the first aspects.

[0051] Through the aforementioned technical means, the integrated energy storage and charging device in the charging pile can output a higher third charging power to meet the needs of supercharging / fast charging, based on the relatively low power provided by the AC power grid. Therefore, no additional transformer is required in the circuit, reducing the cost and size of the integrated energy storage and charging device. Moreover, it is not limited by the transformer connection point and can be connected to the integrated energy storage and charging device at any location on the AC power grid, improving the flexibility of the charging pile and facilitating the rapid charging of the devices to be charged.

[0052] Fourthly, embodiments of this disclosure provide a charging system, which includes a device to be charged and a charging pile as described in the third aspect.

[0053] Through the above-mentioned technical means, without the need for additional transformer configuration, the charging piles in the charging system can achieve high power output to the device to be charged based on the low power input of the AC power grid, which not only reduces the cost and size of the charging system, but also improves the charging speed.

[0054] In some embodiments, the charging module includes a charging gun, the output end of which is connected to the device to be charged; wherein: the integrated energy storage and charging device is used to charge the device to be charged through the charging gun according to the second charging power provided by the DC-DC conversion module and the third charging power provided by the energy storage module.

[0055] By employing the aforementioned technical methods, the charging gun is used to charge the device, thereby improving the stability of the charging process.

[0056] In some embodiments, the charging system further includes a cloud platform connected to the integrated charging and storage device; wherein the cloud platform is configured to receive status parameters of the integrated charging and storage device.

[0057] By using the above-mentioned technical means, the status parameters of the integrated storage and charging device can be received through the cloud platform, which facilitates real-time monitoring of the status of the integrated storage and charging device and enables timely handling of abnormalities when they occur.

[0058] 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 this disclosure. Attached Figure Description

[0059] Figure 1 is a schematic diagram of the composition structure of an integrated storage and charging device provided in an embodiment of this disclosure;

[0060] Figure 2 is a schematic diagram of the composition structure of an integrated storage and charging device provided in an embodiment of this disclosure;

[0061] Figure 3 is a schematic diagram of the composition structure of an integrated storage and charging device provided in an embodiment of this disclosure;

[0062] Figure 4 is a schematic diagram of the composition structure of an integrated storage and charging device provided in an embodiment of this disclosure;

[0063] Figure 5 is a schematic diagram of the composition structure of an integrated storage and charging device provided in an embodiment of this disclosure;

[0064] Figure 6 is a schematic diagram of the composition structure of an integrated storage and charging device provided in an embodiment of this disclosure;

[0065] Figure 7 is a schematic diagram of the composition structure of an energy storage unit provided in an embodiment of this disclosure;

[0066] Figure 8 is a schematic flowchart of a charging control method provided in an embodiment of this disclosure;

[0067] Figure 9 is a schematic diagram of the composition structure of a charging pile provided in an embodiment of this disclosure;

[0068] Figure 10 is a schematic diagram of the composition structure of a charging system provided in an embodiment of this disclosure;

[0069] Figure 11 is a schematic diagram of the composition structure of a charging system provided in an embodiment of this disclosure;

[0070] Figure 12 is a schematic diagram of the composition structure of a charging system provided in an embodiment of this disclosure. Detailed Implementation

[0071] To gain a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference and illustration only and are not intended to limit the embodiments of this disclosure.

[0072] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing embodiments of this disclosure only and is not intended to be limiting of this disclosure.

[0073] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is 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.

[0074] It should also be noted that the terms "first, second, third" used in the embodiments of this disclosure are only used to distinguish similar objects and do not represent a specific order of objects. It is understood that "first, second, third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of this disclosure described herein can be implemented in an order other than that illustrated or described herein.

[0075] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0076] The following is a description of the relevant technologies disclosed herein.

[0077] New energy batteries are being used more and more widely in daily life and industry. For example, new energy vehicles equipped with batteries are already widely used. In addition, batteries are being used more and more in the field of energy storage.

[0078] Currently, new energy batteries are being used more and more widely in daily life and industry. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0079] In this embodiment, the battery can be a single battery cell. A single battery cell refers to a basic unit capable of converting chemical energy into electrical energy, and can be used to manufacture battery modules or battery packs to supply power to electrical devices. A single battery cell can be a rechargeable battery, which is a battery cell that can be recharged after discharge to reactivate its active materials and continue to be used. The single battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this embodiment is not limited to these types.

[0080] In embodiments of this disclosure, the battery may also be a single physical module comprising 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, parallel, or mixed via a busbar.

[0081] An integrated energy storage and charging unit is a device that combines an energy storage system with charging functionality. It can store grid energy through its internal energy storage battery during off-peak hours and provide charging services for new energy vehicles during peak hours, thereby effectively alleviating grid load, optimizing the utilization of power resources, reducing electricity costs, and playing a role in peak shaving and valley filling.

[0082] Although integrated energy storage and charging units can provide emergency power, the voltage output by the energy storage battery in the integrated energy storage and charging unit when charging new energy vehicles is relatively fixed. However, the voltage requirements of various new energy vehicles during charging are not uniform. Therefore, the output voltage of the integrated energy storage and charging unit may not match the voltage requirements of the new energy vehicle, resulting in charging failure.

[0083] Based on this, embodiments of this disclosure provide an integrated charging and energy storage device, a charging control method, a charging pile, and a charging system. A DC-DC converter module converts the first externally input charging power and, based on a structure consisting of a charging module, an energy storage module, and a DC-DC converter connected in series, provides charging output or receives electrical energy to the device to be charged. Thus, because the charging power output by the DC-DC converter module adjusts the charging power provided by the energy storage module, the range of charging power output by the charging module is wider than the first charging power, and it is more flexible than the charging power output by the energy storage module, enabling voltage adaptation to various devices to be charged, thereby expanding the applicability of the integrated charging and energy storage device.

[0084] The present disclosure will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0085] In one embodiment of this disclosure, FIG1 is a schematic diagram of the composition structure of an integrated energy storage and charging device provided in this embodiment. As shown in FIG1, the integrated energy storage and charging device 10 includes an energy storage module 101, a DC-DC conversion module 102, and a charging module 103; wherein:

[0086] The input terminal of the DC-DC converter module 102 is configured to receive the first charging power input from an external source;

[0087] The first output terminal of the DC-DC converter module 102 is connected to the first terminal of the charging module 103, the second output terminal of the DC-DC converter module 102 is connected to the first terminal of the energy storage module 101, and the second terminal of the charging module 103 is connected to the second terminal of the energy storage module.

[0088] The charging module 103 is connected in series with the DC-DC conversion module 102 and the energy storage module 101, and is configured to output or receive electrical energy to the device to be charged.

[0089] In this embodiment of the disclosure, the first output terminal P1 of the DC-DC converter 102, the second output terminal P2 of the DC-DC converter 102, the first terminal P3 of the energy storage module 101, the second terminal P4 of the energy storage module 101, the first input terminal P5 of the charging module 103, and the second input terminal P6 of the charging module 103 can be determined as positive or negative terminals according to their specific structures, so as to realize the series connection of the charging module 103, the DC-DC converter 102, and the energy storage module 101.

[0090] In this embodiment, the DC-DC converter 102 can be an isolated bidirectional DC-DC module. With its first terminal connected to the first terminal of the energy storage module 101 and its second terminal connected to the second terminal of the energy storage module 101, the DC-DC converter 102 can achieve positive and negative DC voltage output. That is, the DC-DC converter 102 can adjust the direction of the output voltage from the received first charging power without changing the current direction, outputting a positive or negative voltage. When the DC-DC converter 102 outputs a positive voltage (i.e., outputs a voltage to the first terminal of the energy storage module 101), the DC-DC converter 102 operates in a positive polarity mode; when the DC-DC converter 102 outputs a reverse voltage (i.e., outputs a voltage to the second terminal of the energy storage module 101), the DC-DC converter 102 operates in a reverse polarity mode.

[0091] Specifically, 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 DC-DC conversion module 102 operates in a positive polarity state, and the output second 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 DC-DC conversion module 102 operates in a reverse polarity state, and the output second charging power is negative.

[0092] In this embodiment of the disclosure, -Ua≤U1-U2≤+Ub, where U1 is the battery voltage of the device to be charged 202, i.e., 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-DC conversion module 102, and +Ub is the limit of the positive voltage output by the DC-DC conversion module 102.

[0093] It should be noted that when U1-U2≥0V, that is, 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 total voltage of the charging circuit is less than the first voltage value of the device to be charged 202. Therefore, based on the principle of energy conservation, the voltage of the charging circuit needs to be increased. At this time, the DC-DC converter module 102 operates in positive polarity and outputs a positive voltage, that is, the second charging power is positive. The DC-DC converter module 102 is connected in series with the energy storage module 101, and provides the sum of the third charging power output by the energy storage module 101 and the second charging power output by the DC-DC converter module 102, that is, the fourth charging power, to the charging module 103, so that the charging module 103 charges the device to be charged 202.

[0094] It should also be noted that when U1-U2 < 0V, meaning 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 total voltage of the charging circuit is greater than the first voltage value of the device to be charged 202. Therefore, based on energy conservation, the voltage of the charging circuit needs to be reduced. In this case, the DC-DC converter 102 operates in reverse polarity, outputting a negative voltage. This means that negative power is fed back to the energy storage module 101 through the bus connecting the DC-DC converter 102 and the energy storage module 101, reducing the output voltage of the energy storage module 101 by the amount of the negative voltage output by the DC-DC converter 102. Thus, the DC-DC converter 102 operates in reverse polarity, providing the energy storage module 101 with a negative second charging power, reducing the output power of the energy storage module 101. The energy storage module 101 then provides the charging power after offsetting the second charging power as a fourth charging power to the charging module 103, enabling the charging module 103 to charge the device to be charged 202.

[0095] In this embodiment of the disclosure, 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 can be set 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 second charging power of the DC-DC conversion module 102 according to the comparison result of the first voltage value and the second voltage value, and control the DC-DC conversion module 102 to work in a positive polarity mode or a reverse polarity mode.

[0096] This disclosure provides an integrated charging and energy storage device. A DC-DC converter converts an externally input first charging power and, based on a structure consisting of a charging module, an energy storage module, and a DC-DC converter connected in series, provides charging output or receives electrical energy from the device to be charged. Thus, because the charging power output by the DC-DC converter adjusts the charging power provided by the energy storage module, the charging power output by the charging module has a wider range than the first charging power and is more flexible than the charging power output by the energy storage module. This allows for voltage adaptation to various devices, thereby expanding the applicability of the integrated charging and energy storage device.

[0097] In some embodiments, FIG2 is a schematic diagram of the composition structure of an integrated energy storage and charging device provided in this disclosure. As shown in FIG2, the positive terminal of the energy storage module 101 is connected to the negative terminal of the DC-DC conversion module 102, and the negative terminal of the energy storage module 101 is connected to the negative terminal of the charging module 103.

[0098] In this embodiment, the first output terminal P1 of the DC-DC converter 102 can be a positive output terminal, and the second output terminal P2 of the DC-DC converter 102 can be a negative output terminal. The first terminal P3 of the energy storage module 101 can be a positive terminal, and the second terminal P4 of the energy storage module 101 can be a negative terminal. The first input terminal P5 of the charging module 103 can be a positive input terminal, and the second input terminal P6 of the charging module 103 can be a negative input terminal. It should be understood that whether each terminal in each module is a positive or negative terminal is determined specifically according to the device. In this disclosure and the following embodiments, the description is based on the embodiment shown in FIG2.

[0099] Alternatively, in some embodiments, Figure 3 is a schematic diagram of the composition structure of an integrated energy storage and charging device provided in this disclosure. As shown in Figure 3, the negative terminal of the energy storage module 101 is connected to the positive terminal of the DC-DC conversion module 102, and the positive terminal of the energy storage module 101 is connected to the positive terminal of the charging module 103.

[0100] In this embodiment, the first output terminal P1 of the DC-DC converter 102 can be a negative output terminal, and the second output terminal P2 of the DC-DC converter 102 can be a positive output terminal. The first terminal P3 of the energy storage module 101 can be a negative terminal, and the second terminal P4 of the energy storage module 101 can be a positive 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.

[0101] This disclosure provides an integrated energy storage and charging device. The energy storage module can be located on either the positive or negative side of the DC-DC conversion module. This improves the flexibility of module placement in the integrated energy storage and charging device.

[0102] In another embodiment of this disclosure, Figure 4 is a schematic diagram of the composition structure of an integrated energy storage and charging device provided in this embodiment. As shown in Figure 4, the integrated energy storage and charging device 10 further includes an AC / DC conversion module 104; wherein:

[0103] The input terminal of the AC / DC conversion module 104 is connected to the AC power grid 201;

[0104] The first end of the energy storage module 101 is connected to the first output end of the AC-DC conversion module 104, the first input end of the DC conversion module 102, and the second output end of the DC conversion module 102, respectively; the second end of the energy storage module 101 is connected to the second output end of the AC-DC conversion module 104 and the second input end of the DC conversion module 102, respectively.

[0105] AC / DC conversion module 104 is configured to provide a first charging power to DC conversion module.

[0106] In this embodiment, the energy storage module 101 can be a battery capable of storing electrical energy in the integrated energy storage and charging device 10, such as a lithium iron phosphate battery or a lithium-ion battery. The energy storage module 101 can store electrical energy from the AC power grid 201 or renewable energy sources, such as the electrical energy output or converted by photovoltaic power generation equipment. The battery capacity and type of the energy storage module 101 are not limited here, but generally, the output power U1 of the energy storage module 101, i.e., the third charging power, is generally greater than 210kW.

[0107] It should be noted that the AC power grid 201 can be a three-phase AC power grid, and its input power is generally less than or equal to 150kW. In this embodiment of the present disclosure, the AC power grid 201 is connected to the AC-DC conversion module 104 and can output AC voltage and AC current to the AC-DC conversion module 104. Those skilled in the art will understand that the AC power grid 201 generally refers to a system capable of providing electricity; as an example, the AC power grid 201 can be a municipal power source.

[0108] In this embodiment, the AC / DC conversion module 104 can be an isolated bidirectional AC / DC converter, or a rectifier, which is a power conversion device capable of converting AC power to DC power or vice versa. The AC / DC conversion module 104 may also include an isolation chip to isolate the AC power grid 201 from the subsequent charging module 103, the device to be charged 202, etc., to prevent damage to the integrated energy storage and charging device 10 and the device to be charged 202 caused by the AC power grid 201. It should be understood that after the input power of the AC power grid 201 is converted to AC / DC by the AC / DC conversion module 104, its output power, i.e., the first charging power, should be less than or equal to 150kW.

[0109] It should also be noted that the AC / DC conversion module 104 can be installed inside the integrated energy storage and charging device 10 or outside the integrated energy storage and charging device 10, depending on actual needs.

[0110] This disclosure provides an integrated energy storage and charging device, in which the energy storage module is connected to both an AC / DC conversion module and a DC conversion module. This enables the DC conversion module to output voltage bidirectionally to the energy storage module, thereby adjusting the output power of the charging module and expanding the voltage adaptability range of the integrated energy storage and charging device for the devices to be charged.

[0111] In some embodiments, referring to FIG4, the integrated storage and charging device 10 further includes a first switch module 105 and a second switch module 106. The first switch module 105 includes a first switch K1 and a second switch K2, and the second switch module 106 includes a third switch K3, a fourth switch K4 and a fifth switch K5.

[0112] The first switch K1 is connected in series between the second input terminal of the DC-DC converter module 102 and the second terminal of the energy storage module 101; the second switch K2 is connected in series between the first input terminal of the DC-DC converter module 102 and the first terminal of the energy storage module 101; the third switch K3 is connected in series between the first output terminal of the DC-DC converter module 102 and the first input terminal of the charging module 103; the fourth switch K4 is connected in series between the second terminal of the energy storage module 101 and the second input terminal of the charging module 103; and the fifth switch K5 is connected in series between the second output terminal of the DC-DC converter module 102 and the first terminal of the energy storage module 101.

[0113] In this embodiment, when the device 202 to be charged needs to be charged via the integrated energy storage and charging device 10, the first switch K1, the second switch K2, the third switch K3, the fourth switch K4, and the fifth switch K5 can be simultaneously turned on. Based on the aforementioned 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-DC conversion module 102 is controlled to operate in either a positive or reverse polarity mode. When operating in a positive polarity mode, the sum of the second and third charging powers is used as the fourth charging power to supply power to the device 202 to be charged; or, when operating in a reverse polarity mode, the third charging power, after canceling out the negative second charging power, is used as the fourth charging power to supply power to the device 202 to be charged. Alternatively, when the first switch K1, the second switch K2, the third switch K3, the fourth switch K4, and the fifth switch K5 are simultaneously turned off, the power supply to the device 202 to be charged is stopped. When the DC-DC converter module 102 operates in a positive polarity mode, it performs work in the positive direction, and the direction of the output current and the output voltage are both positive. In the positive direction, the output terminal of the DC-DC converter module 103 outputs voltage towards the charging module 103. Alternatively, when the DC-DC converter module 102 operates in a reverse polarity mode, it performs work in the negative direction, and the direction of the output current is still positive, but the direction of the output voltage is reverse. In the reverse direction, the DC-DC converter module 103 outputs voltage towards the energy storage module 101 through the path of the first switch and the second switch.

[0114] In this embodiment, the first switch K1 and the second switch K2 are used to control the on / off state of the circuit between the DC-DC conversion module 102 and the energy storage module 101. Based on the aforementioned embodiment, the DC-DC conversion module 102 can operate 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-DC conversion module 102 operates in a reverse polarity mode, both the first switch K1 and the second switch K2 can be controlled to be closed, so that the DC-DC conversion module 102 outputs a negative voltage to the energy storage module 101 through the circuit between the DC-DC conversion module 102 and the energy storage module 101.

[0115] It should be noted that in some embodiments, when the integrated energy storage and charging device 10 is powered on, the first switch K1 and the second switch K2 can be controlled to remain in the on state, regardless of the current operating mode of the DC-DC conversion module 102. This simplifies the control logic.

[0116] Alternatively, when no device 202 is being charged, only the first switch K1 and the second switch K2 can be turned on, while the other switches in the first switch module are turned off, thereby controlling the AC power grid 201 to charge the energy storage module 101. Alternatively, the energy storage module 101 can be controlled to feed electrical energy back to the AC power grid 201.

[0117] This disclosure provides an integrated energy storage and charging device. By controlling the on / off states of switches in a first and second switching module, and based on the operating state of the DC-DC conversion module, the device, together with the energy storage module, charges the device to be charged. It also controls whether the integrated energy storage and charging device charges the device to be charged and whether the AC power grid charges the energy storage module. This not only broadens the power range applicable to the device to be charged but also allows the switches to be turned off when charging is not needed, reducing energy waste.

[0118] In some embodiments, FIG5 is a schematic diagram of the composition structure of an integrated energy storage and charging device provided in this disclosure. As shown in FIG5, in some embodiments, the integrated energy storage and charging device 10 further includes a third switch module, which includes a sixth switch K6; one end of the sixth switch K6 is connected to the first output terminal of the AC-DC conversion module 104, and the other end of the sixth switch K6 is connected to one end of the third switch K3.

[0119] In this embodiment of the present disclosure, when the first switch K1, the third switch K3, the fourth switch K4 and the sixth switch K6 are all in the on state and the second switch K2 and the fifth switch K5 are in the off state, the charging module 103 can charge the device to be charged 202 based on the first charging power provided by the AC-DC conversion module 104, or feed back electrical energy to the AC grid 201 based on the output power of the device to be charged 202.

[0120] In this embodiment of the disclosure, the control module 107 can detect the power of the energy storage module 101. If the power of the energy storage module 101 is insufficient, it can control the first switch K1, the third switch K3, the fourth switch K4 and the sixth switch K6 to be in the conducting state, so that the AC power grid 201 can charge the device 202 to be charged, or the device 202 to be charged can feed back power to the AC power grid 201.

[0121] This disclosure provides an integrated energy storage and charging device. By controlling the on / off state of each switch in a third switching module, the integrated energy storage and charging device can charge a device to be charged, or enable V2G functionality between the device to be charged and the AC power grid. This allows charging to be performed according to the actual conditions of both the integrated energy storage and charging device and the device to be charged, improving charging flexibility.

[0122] In another embodiment of this disclosure, FIG6 is a schematic diagram of the composition structure of an integrated energy storage and charging device provided in this embodiment. As shown in FIG6, the energy storage module 101 includes at least one energy storage unit; wherein: at least one energy storage unit is connected in series and / or in parallel between the first end and the second end of the energy storage module 101 to provide a third charging power.

[0123] In this embodiment, the energy storage module 101 includes one or more energy storage units, namely energy storage unit 1 1014, energy storage unit 2 1013, ..., energy storage unit n-1 1012 and energy storage unit n 1011 (n is a positive integer). Each energy storage unit includes a positive terminal and a negative terminal. Multiple energy storage units are connected in series and / or in parallel to form the energy storage module 101, enabling the energy storage module 101 to provide a third charging power. As an example, the energy storage unit can be an electrical box.

[0124] It should also be noted that the multiple energy storage units in the energy storage module 101 can be connected in parallel, in series, or in a combination of series and parallel connections, without any specific limitation. In this disclosure and the following embodiments, multiple energy storage units connected in series are used as an example. In this way, when there are multiple energy storage units, the power of the energy storage module 101 is the sum of the power of the multiple energy storage units. Thus, the energy storage module 101 can output higher power to charge the device 202, and the high-power charging demand can be met without adding a transformer or expanding the transformer capacity on the AC power grid 201 side.

[0125] In this embodiment, the number of energy storage units can be selected based on actual needs. When the integrated energy storage and charging device 10 is only used for low-power charging, the energy storage unit can be set to one or a few units, which can meet the needs of low-power charging scenarios; when the integrated energy storage and charging device 10 is applied to fast charging / supercharging scenarios, the energy storage unit can be set to multiple units.

[0126] In this embodiment of the disclosure, the number of energy storage units in the energy storage module 101 can be set according to actual needs, and energy storage units can be freely added or removed in series or parallel.

[0127] This disclosure provides an integrated energy storage and charging device. The energy storage module includes multiple energy storage units connected in series and / or in parallel. As such, due to the modularity of the energy storage units, energy storage units can be freely added or removed, which facilitates the rapid connection and disconnection of energy storage units and improves the flexibility of the fourth charging power output of the integrated energy storage and charging device.

[0128] In some embodiments, FIG7 is a schematic diagram of the composition structure of an energy storage unit provided in an embodiment of the present disclosure. As shown in FIG7, each energy storage unit includes an energy storage battery, and each energy storage unit is configured to provide a fifth charging power based on the electrical energy of the energy storage battery; wherein the fifth charging power is less than or equal to the third charging power.

[0129] In this embodiment, the energy storage battery can be a single-cell battery, a multi-cell battery, a blade battery, a battery module, etc., and there are no specific limitations here.

[0130] In this embodiment, the number of energy storage batteries in each energy storage unit may be equal or unequal, depending on specific requirements. Each energy storage unit can provide a fifth charging power based on the number of energy storage batteries it contains. It should be understood that the fifth charging power corresponding to different energy storage units may be the same or different.

[0131] It should be noted that each energy storage unit provides a fifth charging power based on the electrical energy of the energy storage battery. Furthermore, multiple energy storage units, connected in series and / or in parallel, provide a third charging power to the device to be charged 202. By setting the number of energy storage units and the number of energy storage batteries in each energy storage unit, the different charging needs of the device to be charged 202 can be met.

[0132] This disclosure provides an integrated energy storage and charging device, in which each energy storage unit includes at least one energy storage battery. This allows for control of the output power of the integrated energy storage and charging device to meet the charging needs of different devices.

[0133] In some embodiments, continuing to refer to FIG6, at least a portion of the energy storage units in at least one energy storage unit includes a fourth switching module, which is connected in series between the first terminal of the respective energy storage unit and the second output terminal of the AC-DC conversion module.

[0134] In this embodiment of the disclosure, when the fourth switch module is in the on state, at least one energy storage unit in the charging circuit where the second switch is located can be connected in series to provide a third charging power.

[0135] In this embodiment of the disclosure, the fourth switch module includes multiple switches. That is, a switch can be set on the path connecting each energy storage module 101 to the AC-DC conversion module 104 and the DC conversion module 102 to control the number of energy storage units connected to the charging circuit, thereby controlling the power output to the device to be charged 202.

[0136] When there is only one energy storage unit, if the energy storage unit includes a switch, then when the switch and the second switch K2 are turned on, the energy storage unit can be connected in series with the DC-DC converter module 102. When the DC-DC converter module 102 is in a positive or reverse polarity working state, they together provide a third charging power to the charging module 103.

[0137] When there are multiple energy storage units, for example, including energy storage unit 1 1014, energy storage unit 2 1013, ..., energy storage unit n-1 1012 and energy storage unit n 1011, and where energy storage unit 1 1014 includes a corresponding switch Kq1, energy storage unit 2 1013 includes a corresponding switch Kq2, energy storage unit n-1 1012 includes a corresponding switch Kqn-1, and energy storage unit n 1011 includes a corresponding switch Kqn, if switch Kq2 is closed and the remaining switches in the other energy storage units (i.e., the fourth switch module) are turned off, then energy storage units 1 1014 and 2 1013 are connected in series with the DC-DC conversion module 102 to jointly provide the fourth charging power to the charging module 103; or, it should be understood that if switch Kqn is closed and the switches in the other energy storage units are turned off, then energy storage units 1 1014 to energy storage unit n 1011 are connected in series. 1011 are all connected in series with DC-DC conversion module 102, together providing a fourth charging power for charging module 103.

[0138] This disclosure provides an integrated energy storage and charging device. Based on the control of the switching state of a fourth switching module, the number of energy storage units connected in series in the integrated energy storage and charging device is controlled. This allows for flexible selection of the number of connected energy storage units according to the charging power requirements of the device to be charged, improving charging flexibility and expanding the range of the fourth charging power output by the integrated energy storage and charging device.

[0139] In some embodiments, as shown in Figures 4, 5, and 6, the integrated storage and charging device further includes a control module 107; wherein:

[0140] The control module is connected to the first switch module 105, the second switch module 106, the third switch module, and the fourth switch module, and is configured to send drive signals to the first switch module 105, the second switch module 106, the third switch module, and the fourth switch module; wherein, the drive signals are used to control the on and off states of the first switch module 105, the second switch module 106, the third switch module, and the fourth switch module.

[0141] In this embodiment of the disclosure, the control module 107 may also be referred to as the control unit of the integrated storage and charging device 10, and may include devices such as a microcontroller unit (MCU), sensors, and switching circuits, for monitoring, controlling and managing the integrated storage and charging device 10.

[0142] In this embodiment of the disclosure, the control module 107 can send a drive signal to each switch in the first switch module 105, the second switch module 106, the third switch module, and the fourth switch module. It should be understood that each drive signal can have a different level state, and the corresponding switch can be turned on or off based on the level state of the drive signal. For example, when the drive signal is in a high level state, the corresponding switch can be turned on, and when the drive signal is in a low level state, the corresponding switch can be turned off.

[0143] In this embodiment of the disclosure, the control module 107 can also be used to detect and monitor the current and voltage of each module in the integrated storage and charging device 10, and to issue an alarm in a timely manner when an abnormality occurs.

[0144] It should also be noted that the control module 107 can also be connected to the interactive interface of the integrated energy storage and charging device 10. Based on the operation selected by the user in the interactive interface, it generates drive signals to control the opening and closing state of each switch, so as to charge the device 202 to be charged in a charging mode based on the user's needs, or to feed back electrical energy to the power grid.

[0145] This disclosure provides an integrated energy storage and charging device, in which a control module controls the on / off state of various switches to enable the device to perform different functions. This improves the convenience and safety of controlling the integrated energy storage and charging device.

[0146] In some embodiments, as shown in Figures 4, 5 and 6, the integrated storage and charging device 10 further includes a communication module 108; the communication module 108 is connected to the control module 107; wherein: the control module 107 is configured to acquire the status parameters of the integrated storage and charging device 10 and send the status parameters of the integrated storage and charging device 10 to the communication module 108; the communication module 108 is configured to receive the status parameters of the integrated storage and charging device 10 and forward them to the cloud platform.

[0147] In this embodiment of the disclosure, the communication module 108 can also be called a wireless communication module. It has communication function and can receive the status parameters of each module in the integrated storage and charging device 10 collected by the control module 107, such as input current, output current, input voltage, output voltage and other parameters, and transmit these status parameters to the cloud platform.

[0148] In this embodiment, the communication module 108 can also receive control signals from the cloud platform and send them to the control module 107, enabling the control module 107 to generate drive signals based on the control signals to control the opening and closing of each switch. The control signals can be generated based on user operations on the cloud platform's interactive interface. For example, the user can perform batch operations on the integrated charging and storage device 10 by selecting different charging modes or discharging modes to the power grid.

[0149] This disclosure provides an integrated energy storage and charging device, in which the communication module feeds back the status parameters collected by the control module to the cloud platform. This enables timely storage of the integrated energy storage and charging device's operational data and allows for monitoring of its operational status, thereby improving the device's operational reliability.

[0150] In some embodiments, the AC / DC conversion module 104 is a bidirectional AC / DC module, and the DC / DC conversion module 102 is a bidirectional DC / DC module.

[0151] It should be noted that the AC / DC conversion module 104 can also be an isolated unidirectional AC / DC module or an isolated bidirectional AC / DC module. It has an internal isolation chip to isolate the integrated energy storage and charging device 10 from the grid side. The specific structure of the AC / DC conversion module 104 is not limited here.

[0152] It should be noted that the DC-DC converter module 102 can be either an isolated unidirectional DC-DC converter module or an isolated bidirectional DC-DC converter module. It has an internal isolation chip to isolate the integrated energy storage and charging device 10 from the AC-DC converter module 104, and can operate in either positive or reverse polarity based on the control of the control module. The specific structure of the DC-DC converter module 102 is not limited here.

[0153] In this embodiment of the disclosure, when the AC-DC conversion module 104 is a bidirectional AC-DC module and the DC conversion module 102 is a bidirectional DC-DC module, it can not only charge the energy storage module 101 and / or the device to be charged 202, but also feed the electrical energy of the energy storage module 101 or the device to be charged 202 back to the AC power grid 201.

[0154] It should also be noted that when an external power source provides DC power, the integrated charging and storage device 10 can be charged via the input interface.

[0155] This disclosure provides an integrated energy storage and charging device, with an AC / DC conversion module that is a bidirectional AC-DC module and a DC-DC conversion module that is a bidirectional DC-DC module. This enables bidirectional power exchange between the integrated energy storage and charging device and the AC power grid. The integrated energy storage and charging device can not only charge the devices to be charged but also feed power back to the grid, which helps to smooth peak and valley loads, improve grid stability, and increase energy utilization.

[0156] In some embodiments, the voltage difference between the first voltage value of the device to be charged and the second voltage value of the energy storage module is less than or equal to a first preset value.

[0157] It should be noted that, without a transformer, the voltage input from the AC grid to the integrated energy storage and charging device 10 is less than or equal to a first preset value. This first preset value can be determined based on actual conditions and may be 250 volts or 350 volts. Therefore, the output voltage (second voltage value) of the energy storage module 101, or the voltage value output by the DC-DC conversion module, can be adjusted by controlling the number of connected energy storage units, so that the difference between this voltage and the charging voltage (first voltage value) of the device to be charged 202 is less than or equal to the first preset value.

[0158] This disclosure provides an integrated energy storage and charging device where the voltage difference between the first voltage value of the device to be charged and the second voltage value of the energy storage module is less than or equal to a first preset value. This enables high-power output to the device to be charged, reduces the size of the integrated energy storage and charging device, and improves charging flexibility.

[0159] In another embodiment of this disclosure, a charging control method is provided, which is applied to the integrated energy storage and charging device in the foregoing embodiments. As shown in FIG1, the integrated energy storage and charging device 10 may include an energy storage module 101, a DC-DC conversion module 102 and a charging module 103.

[0160] As shown in Figure 8, the method may include:

[0161] S301, the DC-DC converter module receives the first charging power input from the outside, and outputs the third charging power through the energy storage module.

[0162] S302, based on the first voltage value of the device to be charged and the second voltage value of the energy storage module, determine the working state of the DC-DC conversion module, and convert the first charging power into the second charging power based on the working state.

[0163] The working states include positive polarity working state and negative polarity working state.

[0164] S303 provides the second and third charging power to the charging module for charging output, and provides the fourth charging power output by the charging module to the device to be charged for charging.

[0165] This disclosure provides a charging control method in which a DC-DC converter converts an externally input first charging power and outputs a second charging power based on its operating state. A charging module further combines the second charging power with a third charging power provided by an energy storage module to provide a fourth charging power to the device being charged. Because the second charging power output by the DC-DC converter adjusts the third charging power provided by the energy storage module, the fourth charging power output by the charging module has a wider range than the second charging power and is more flexible than the third charging power output by the energy storage module. This allows for voltage adaptation to various devices, thereby expanding the applicability of the integrated charging and energy storage device.

[0166] In some embodiments, as shown in FIG4, the integrated storage and charging device 10 further includes a first switch module 105. The method may also include:

[0167] When the first switch module 105 is in the on state, the DC-DC conversion module 102 operates in the reverse polarity state, and the second charging power provided by the DC-DC conversion module 102 is fed back to the energy storage module 101, so that the charging module 103 can charge the device 202 to be charged based on the third charging power provided by the energy storage module 101.

[0168] Alternatively, when the first switch module 105 is in the off state, the DC-DC conversion module 102 operates in a positive polarity state, enabling the charging module 103 to charge the device 202 to be charged based on the second charging power provided by the DC-DC conversion module 102 and the third charging power provided by the energy storage module 101.

[0169] In this embodiment, the first switch module 105 can be disposed between the energy storage module 101 and the DC-DC conversion module 102. Thus, when the DC-DC conversion module 102 operates in reverse polarity, the first switch module 105 is turned on, causing the reverse voltage output by the DC-DC conversion module 102 to feed back to the negative terminal of the energy storage module 101, reducing the voltage output by the energy storage module 101 to the charging module 103; or, when the DC-DC conversion module 102 operates in positive polarity, the first switch module 105 can be in a turned-off state, or it can be in a continuously turned-on state, causing the positive voltage output by the DC-DC conversion module 102 to feed back to the positive terminal of the energy storage module 101, increasing the voltage output by the energy storage module 101 to the charging module 103.

[0170] This disclosure provides a charging control method that controls the on or off state of a first switching module to match the operating state of a DC-DC conversion module. This allows the second charging power provided by the DC-DC conversion module and the third charging power provided by the energy storage module to charge the device through the charging module in a superimposed or offset manner, thereby broadening the applicability of the device to be charged.

[0171] In some embodiments, referring further to FIG4, the integrated energy storage and charging device 10 further includes a second switch module 106. The method further includes: charging the energy storage module 101 based on the first charging power provided by the AC-DC conversion module 104 when the first switch module 105 is in the on state and the second switch module 106 is in the off state, or feeding back electrical energy to the AC grid 201 based on the output power of the energy storage module 101.

[0172] In this embodiment of the disclosure, the second switch module 106 may be disposed on the path between any two of the energy storage module 101, the AC / DC conversion module 104 and the charging module 103, in order to control the on / off of the circuit for charging the device 202 to be charged.

[0173] In addition, when the device 202 to be charged is not charging, that is, when the first switch module 105 is on and the second switch module 106 is off, the AC power grid 201 can supply power to the energy storage module 101, or the energy storage module 101 can feed back electrical energy to the AC power grid 201.

[0174] This disclosure provides a charging control method in which, when the second switching module is turned on, the energy storage module feeds back electrical energy to the AC power grid, or the AC power grid charges the energy storage module through an AC-DC conversion module. This achieves power balance between the energy storage module and the AC power grid, effectively shaving off peak loads and filling valleys in the AC power grid, thereby improving the utilization rate of electrical energy.

[0175] In some embodiments, as shown in FIG4, the first switch module includes a first switch K1 and a second switch K2, and the second switch module includes a third switch K3, a fourth switch K4, and a fifth switch K5; the method further includes:

[0176] When all five switches (first, second, third, fourth, and fifth) are in the ON state, the DC-DC converter operates in reverse polarity, and the second charging power provided by the DC-DC converter is fed back to the energy storage module, enabling the charging module to charge the device based on the third charging power provided by the energy storage module. Alternatively, when the third, fourth, and fifth switches are in the ON state and the first and second switches are in the OFF state, the DC-DC converter operates in positive polarity, enabling the charging module to charge the device based on the second charging power provided by the DC-DC converter and the third charging power provided by the energy storage module. Alternatively, when the third, fourth, and fifth switches are in the OFF state and the first and second switches are in the ON state, the energy storage module is charged based on the first charging power provided by the AC-DC converter, or the energy storage module feeds back electrical energy to the AC grid based on its output power.

[0177] This disclosure provides a charging control method that controls whether an integrated energy storage and charging device charges a device to be charged, and whether the AC power grid charges the energy storage module, by turning on and off the switches in a first and second switching module. This allows the switches to be turned off when charging is not needed, reducing energy waste.

[0178] In some embodiments, as shown in FIG5, the integrated storage and charging device further includes a third switch module, the third switch module including a sixth switch K6; the method further includes:

[0179] When the first, third, fourth, and sixth switches are all in the ON state and the second and fifth switches are in the OFF state, the charging module can charge the device to be charged based on the first charging power provided by the AC-DC conversion module, or feed back electrical energy to the AC grid based on the output power of the device to be charged.

[0180] This disclosure provides a charging control method that controls an integrated energy storage and charging device to charge a device under test, or to enable V2G functionality between the device under test and the AC power grid, by turning on or off the switches in a third switching module. This allows charging to be performed according to the actual conditions of both the integrated energy storage and charging device and the device under test, improving charging flexibility.

[0181] In some embodiments, as shown in FIG6, the energy storage module includes at least one energy storage unit, and at least a portion of the energy storage units in the at least one energy storage unit includes a fourth switch module; the method further includes: when the fourth switch module is in the on state, connecting at least one energy storage unit in the charging circuit where the second switch is located in series to provide a third charging power.

[0182] This disclosure provides a charging control method. The energy storage module includes multiple energy storage units connected in series and / or in parallel. As a result of the modularity of the energy storage units, energy storage units can be freely added or removed, which facilitates the rapid connection and removal of energy storage units and improves the flexibility of the fourth charging power output of the integrated energy storage and charging device.

[0183] In another embodiment of this disclosure, FIG9 is a schematic diagram of the composition structure of a charging pile provided in an embodiment of this disclosure. As shown in FIG9, the charging pile 40 includes the integrated energy storage and charging device 10 in the aforementioned embodiment.

[0184] In this embodiment, the charging pile 40 may include the integrated storage and charging device 10 in the aforementioned embodiments, as well as other devices that interact with the user and supporting components, etc., which are not specifically limited here.

[0185] This disclosure provides a charging pile in which the integrated energy storage and charging device can output a higher third charging power to meet the needs of supercharging / fast charging based on the lower power provided by the AC power grid. Therefore, no additional transformer is required in the circuit, reducing the cost and size of the integrated energy storage and charging device. Moreover, it is not limited by the transformer connection point and can be connected to any location on the AC power grid, improving the flexibility of the charging pile and facilitating the rapid charging of the devices to be charged.

[0186] In another embodiment of this disclosure, FIG10 is a schematic diagram of the composition structure of a charging system provided in an embodiment of this disclosure. As shown in FIG10, the charging system 50 includes a device to be charged 202 and a charging pile 40 as described in the foregoing embodiment.

[0187] As in the aforementioned embodiments, the charging pile 40 includes an integrated energy storage and charging device, which charges the device 202 to be charged.

[0188] As shown in Figure 5, the DC-DC converter module 102, i.e., the isolated bidirectional DC / DC converter, achieves both positive and negative DC voltage output. -Ua≤U1-U2≤+Ub. Here, U1 is the voltage of the device to be charged 202, such as a car battery; U2 is the voltage of the energy storage module 101 inside the integrated charging and storage 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 a wider range of car battery voltages without considering the car battery voltage range.

[0189] When the integrated energy storage and charging device 10 charges the vehicle, K1, K2, and K6 need to be disconnected, and K3, K4, and K5 need to be closed. When U1-U2≥0V, the DC / DC converter operates in positive polarity, outputting a positive voltage, and the integrated energy storage and charging device 10 charges the vehicle. When U1-U2<0V, K1 and K2 are closed, the DC / DC converter operates in reverse polarity, outputting a negative voltage, and the power of the DC / DC converter is fed back to the bus of the energy storage module 101 through K1 and K2, allowing the integrated energy storage and charging device 10 to charge the vehicle.

[0190] When there is no car charging, and only the AC power grid 201 supplies power to the internal energy storage module 101 of the integrated energy storage and charging device 10, then K3, K4, K5, and K6 need to be disconnected, and K1 and K2 need to be closed. The AC power grid charges the energy storage module 101 independently.

[0191] When the integrated energy storage and charging device 10 charges the vehicle, and the energy storage module 101 inside the integrated energy storage and charging device 10 is insufficient, the vehicle needs to be charged solely by the AC power grid. In this case, K2 and K5 need to be disconnected, and K1, K3, K4, and K6 need to be closed. The power grid then charges the vehicle independently.

[0192] When V2G functionality is implemented, the vehicle feeds electrical energy back to the grid. This requires disconnecting K2 and K5, and closing K1, K3, K4, and K6. The vehicle then feeds electrical energy back to the grid.

[0193] When the energy storage device feeds back electrical energy to the grid, it is necessary to disconnect K3, K4, K5, and K6, and close K1 and K2. The internal energy storage module 101 of the integrated energy storage and charging device 10 feeds back electrical energy to the AC grid.

[0194] This disclosure provides a charging system in which, without the need for an additional transformer, the charging pile in the charging system can achieve a high power output to the device to be charged based on a small power input from the AC power grid. This not only reduces the cost and size of the charging system but also improves the charging speed.

[0195] In some embodiments, FIG11 is a schematic diagram of the composition structure of a charging system provided in this disclosure. As shown in FIG11, the charging module includes a charging gun 401, the output end of which is connected to the device to be charged 202; wherein:

[0196] The integrated energy storage and charging device 10 is used to charge the device to be charged 202 through the charging gun 401 according to the second charging power provided by the DC conversion module and the third charging power provided by the energy storage module.

[0197] It should be noted that, in the embodiments disclosed herein, the charging module and / or charging gun may be disposed inside the integrated storage and charging device or outside the integrated storage and charging device, and connected to the integrated storage and charging device when the device to be charged 202 needs to be charged, without any specific limitation.

[0198] This disclosure provides a charging system that charges a device using a charging gun, thereby improving the stability of the charging process.

[0199] In some embodiments, FIG12 is a schematic diagram of the composition structure of a charging system provided in this disclosure. As shown in FIG12, the charging system further includes a cloud platform 501, which is connected to the integrated storage and charging device; wherein: the cloud platform 501 is configured to receive the status parameters of the integrated storage and charging device.

[0200] In this embodiment of the disclosure, the cloud platform 501 can be set on a cloud server to obtain the status parameters collected by the control module in the integrated storage and charging device and display them to the operator.

[0201] This disclosure provides a charging system that receives status parameters of an integrated energy storage and charging device through a cloud platform, facilitating real-time monitoring of the device's status and enabling timely handling of any abnormalities.

[0202] It should be understood that those skilled in the art will recognize that this disclosure may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0203] It should also be understood that the phrase "an embodiment" or "one embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this disclosure. Therefore, "in one embodiment" or "one embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this disclosure, the sequence numbers of the above steps / processes do not imply a sequential order of execution; the execution order of each step / process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this disclosure. The sequence numbers of the above embodiments of this disclosure are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0204] It should be noted that, in this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0205] In the several embodiments provided in this disclosure, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components may be combined, or integrated into another system, or some features may be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0206] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units; some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, in the embodiments of this disclosure, all functional units may be integrated into one processing unit, or each unit may be a separate unit, or two or more units may be integrated into one unit; the integrated unit may be implemented in hardware or in a combination of hardware and software functional units.

[0207] The above are merely preferred embodiments of this disclosure and are not intended to limit the scope of protection of this disclosure. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. An integrated energy storage and charging device, comprising an energy storage module, a DC-DC conversion module, and a charging module; wherein: The input terminal of the DC-DC converter module is configured to receive the first charging power input from an external source; The first output terminal of the DC-DC converter module is connected to the first terminal of the charging module, the second output terminal of the DC-DC converter module is connected to the first terminal of the energy storage module, and the second terminal of the charging module is connected to the second terminal of the energy storage module. The charging module is connected in series with the DC-DC conversion module and the energy storage module, and is configured to output or receive electrical energy to the device to be charged.

2. The integrated storage and charging device according to claim 1, wherein, The positive terminal of the energy storage module is connected to the negative terminal of the DC-DC conversion module, and the negative terminal of the energy storage module is connected to the negative terminal of the charging module; or, The negative terminal of the energy storage module is connected to the positive terminal of the DC-DC converter, and the positive terminal of the energy storage module is connected to the positive terminal of the charging module.

3. The integrated device of claim 1, wherein, The integrated energy storage and charging device also includes an AC / DC conversion module; wherein: The input terminal of the AC / DC conversion module is connected to the AC power grid; The first end of the energy storage module is connected to the first output end of the AC-DC conversion module, the first input end of the DC conversion module, and the second output end of the DC conversion module, respectively; the second end of the energy storage module is connected to the second output end of the AC-DC conversion module and the second input end of the DC conversion module, respectively. The AC / DC conversion module is configured to provide the first charging power to the DC conversion module.

4. The device according to claim 3, wherein The integrated storage and charging device also includes a first switch module and a second switch module. The first switch module includes a first switch and a second switch, and the second switch module includes a third switch, a fourth switch and a fifth switch. The first switch is connected in series between the second input terminal of the DC-DC converter and the second terminal of the energy storage module; the second switch is connected in series between the first input terminal of the DC-DC converter and the first terminal of the energy storage module; the third switch is connected in series between the first output terminal of the DC-DC converter and the first input terminal of the charging module; the fourth switch is connected in series between the second terminal of the energy storage module and the second input terminal of the charging module; and the fifth switch is connected in series between the second output terminal of the DC-DC converter and the first terminal of the energy storage module.

5. The device according to claim 4, wherein The integrated storage and charging device also includes a third switch module, which includes a sixth switch. One end of the sixth switch is connected to the first output terminal of the AC / DC conversion module, and the other end of the sixth switch is connected to one end of the third switch.

6. The integrated device of any one of claims 1 to 5, wherein, The energy storage module includes at least one energy storage unit; wherein: The at least one energy storage unit is connected in series and / or in parallel between the first end and the second end of the energy storage module to provide a third charging power.

7. The device according to claim 6, wherein Each of the energy storage units includes an energy storage battery, and each of the energy storage units is configured to provide a fifth charging power based on the electrical energy of the energy storage battery; wherein the fifth charging power is less than or equal to the third charging power.

8. The integrated device of claim 7, wherein, At least a portion of the at least one energy storage unit includes a fourth switching module, which is connected in series between the first terminal of the corresponding energy storage unit and the second output terminal of the AC / DC conversion module.

9. The integrated device of any one of claims 1 to 8, wherein, 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, the third switch module, and the fourth switch module, and is configured to send drive signals to the first switch module, the second switch module, the third switch module, and the fourth switch module; wherein, the drive signals are used to control the on and off states of the first switch module, the second switch module, the third switch module, and the fourth switch module.

10. The integrated device of any one of claims 1 to 9, wherein, The integrated storage and charging device further includes a communication module; the communication module is connected to the control module; wherein: The control module is configured to acquire the status parameters of the integrated storage and charging device and send the status parameters of the integrated storage and charging device to the communication module; The communication module is configured to receive the status parameters of the integrated storage and charging device and forward them to the cloud platform.

11. The integrated device of any one of claims 1 to 10, wherein, The AC / DC conversion module is a bidirectional AC / DC module, and the DC conversion module is a bidirectional DC / DC module.

12. The integrated device of any one of claims 1 to 10, wherein, The voltage difference between the first voltage value of the device to be charged and the second voltage value of the energy storage module is less than or equal to a first preset value.

13. A charging control method applied to an integrated energy storage and charging device, the integrated energy storage and charging device comprising an energy storage module, a DC-DC conversion module, and a charging module; the method comprising: The DC-DC conversion module receives a first charging power input from the outside and outputs a third charging power through the energy storage module; The operating state of the DC-DC converter is determined based on the first voltage value of the device to be charged and the second voltage value of the energy storage module, and the first charging power is converted into the second charging power based on the operating state; wherein, the operating state includes a positive polarity operating state and a reverse polarity operating state; The second and third charging powers are provided to the charging module for charging output, and the fourth charging power output by the charging module is provided to the device to be charged for charging.

14. The charge control method according to claim 13, wherein, The integrated storage and charging device further includes a first switch module; the method further includes: When the first switch module is in the on state, the DC-DC conversion module operates in the reverse polarity state, and the second charging power provided by the DC-DC conversion module is fed back to the energy storage module, so that the charging module can charge the device to be charged based on the third charging power provided by the energy storage module. Alternatively, when the first switch module is in the off state, the DC-DC conversion module operates in a positive polarity state, enabling the charging module to charge the device to be charged based on the second charging power provided by the DC-DC conversion module and the third charging power provided by the energy storage module.

15. The charge control method according to claim 14, wherein, The integrated storage and charging device further includes a second switching module; the method further includes: When the first switch module is in the ON state and the second switch module is in the OFF state, the energy storage module is charged based on the first charging power provided by the AC / DC conversion module, or the energy storage module is fed back to the AC grid based on the output power of the energy storage module.

16. The charge control method according to claim 15, wherein, The first switch module includes a first switch and a second switch, and the second switch module includes a third switch, a fourth switch, and a fifth switch; the method further includes: When the first, second, third, fourth, and fifth switches are all in the ON state, the DC-DC conversion module operates in reverse polarity mode, and the second charging power provided by the DC-DC conversion module is fed back to the energy storage module, enabling the charging module to charge the device to be charged based on the third charging power provided by the energy storage module. Alternatively, when the third, fourth, and fifth switches are in the ON state, and the first and second switches are both in the OFF state, the DC-DC conversion module operates in positive polarity mode, enabling the charging module to charge the device to be charged based on the second charging power provided by the DC-DC conversion module and the third charging power provided by the energy storage module. Alternatively, when the third, fourth, and fifth switches are all in the OFF state, and the first and second switches are in the ON state, the energy storage module is charged based on the first charging power provided by the AC-DC conversion module, or the energy storage module feeds back electrical energy to the AC grid based on its output power.

17. The charging control method according to any one of claims 13 to 16, wherein, The integrated storage and charging device further includes a third switch module, which includes a sixth switch; the method further includes: When the first switch, the third switch, the fourth switch, and the sixth switch are all in the ON state and the second switch and the fifth switch are in the OFF state, the charging module can charge the device to be charged based on the first charging power provided by the AC-DC conversion module, or feed back electrical energy to the AC power grid based on the output power of the device to be charged.

18. The charging control method according to any one of claims 13 to 17, wherein, The energy storage module includes at least one energy storage unit, and at least a portion of the at least one energy storage unit includes a fourth switching module; the method further includes: When the fourth switch module is in the ON state, at least one energy storage unit in the charging circuit where the second switch is located is connected in series to provide the third charging power.

19. A charging pile, the charging pile comprising an integrated energy storage and charging device as described in any one of claims 1 to 12.

20. A charging system comprising a device to be charged and a charging pile as described in claim 19.

21. The charging system of claim 20, wherein, The charging module includes a charging gun, the output end of which is connected to the device to be charged; wherein: The integrated energy storage and charging device is configured to charge the device to be charged via the charging gun according to the second charging power provided by the DC conversion module and the third charging power provided by the energy storage module.

22. The charging system of claim 20, wherein, The charging system also includes a cloud platform, which is connected to the integrated storage and charging device; wherein: The cloud platform is configured to receive the state parameters of the storage and charging integrated device.

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