Energy storage and charging integrated apparatus, and charging system

Abstract

An energy storage and charging integrated apparatus, and a charging system. The energy storage and charging integrated apparatus (10) comprises a first voltage conversion module (101), a second voltage conversion module (102), an energy storage module (103), a first switch module (104) and a second switch module (105), wherein an output end of the first voltage conversion module (101) is connected to a first end of the first switch module (104), a second end of the first switch module (104) is connected to the energy storage module (103), an output end of the second voltage conversion module (102) is connected to a first end of the second switch module (105), and a second end of the second switch module (105) is connected to the energy storage module (103). The energy storage and charging integrated apparatus (10) is used for controlling on-off states of the first switch module (104) and the second switch module (105), and performing a charging and discharging test among the first voltage conversion module (101), the second voltage conversion module (102) and the energy storage module (103).

Description

Integrated energy storage and charging device and charging system

[0001] Cross-reference to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202421647403.0, filed on July 12, 2024, entitled “Integrated Storage and Charging Device and Charging System”, the entire contents of which are incorporated herein by reference. Technical Field

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

[0004] With the increasing number of new energy vehicles, the requirements for charging infrastructure are becoming increasingly stringent. Integrated energy storage and charging units combine energy storage and charging functions, regulating electrical load and increasing long-term benefits. Currently, integrated energy storage and charging units are widely used in charging stations for new energy vehicles.

[0005] To ensure the stable and reliable operation of the integrated energy storage and charging unit, it is necessary to test its overall charging and discharging function and the reliability and stability of each module at the installation site to avoid any module malfunctions. One current solution is to use external charging and discharging equipment for testing; however, this method not only increases testing costs but also hinders on-site debugging of the integrated energy storage and charging unit. Summary of the Invention

[0006] The technical solution disclosed herein is implemented as follows:

[0007] In a first aspect, embodiments of this disclosure provide an integrated energy storage and charging device, which includes a first voltage conversion module, a second voltage conversion module, an energy storage module, a first switching module, and a second switching module, wherein:

[0008] The input terminal of the first voltage conversion module is connected to the AC power grid, the output terminal of the first voltage conversion module is connected to the first terminal of the first switching module, and the second terminal of the first switching module is connected to the energy storage module.

[0009] The output terminal of the first voltage conversion module is also connected to the input terminal of the second voltage conversion module, the output terminal of the second voltage conversion module is connected to the first terminal of the second switching module, and the second terminal of the second switching module is connected to the energy storage module.

[0010] The integrated energy storage and charging device is used to control the opening and closing states of the first and second switching modules, and to perform charging and discharging tests between the first voltage conversion module, the second voltage conversion module, and the energy storage module.

[0011] By employing the aforementioned technical means and controlling the opening and closing states of the first and second switching modules, different test circuits are formed between the first voltage conversion module, the second voltage conversion module, and the energy storage module, thereby enabling charge and discharge tests on these modules. In this way, the integrated charging and storage device can perform charge and discharge tests on its internal modules without requiring external charging and discharging equipment, reducing testing costs. Furthermore, the integrated charging and storage device is not limited by testing equipment or testing sites, facilitating on-site debugging and thus improving testing efficiency.

[0012] In some embodiments, the integrated storage and charging device further includes a control module; wherein: the control module is configured to send a first drive signal to a first switch module and a second drive signal to a second switch module; the first switch module is configured to receive the first drive signal and control the opening and closing state of the first switch module according to the first drive signal; the second switch module is configured to receive the second drive signal and control the opening and closing state of the second switch module according to the second drive signal.

[0013] By employing the aforementioned technical means, a first drive signal is sent to the first switching unit to control its on or off state; a second drive signal is sent to the second switching unit to control its on or off state. This allows for the formation of different circuit loops, enabling testing to be completed without the need for external equipment, thus improving testing efficiency and convenience.

[0014] In some embodiments, the integrated energy storage and charging device is configured to control the first switching module to be turned on and the second switching module to be turned off when the first driving signal is at a first level and the second driving signal is at a second level, and to perform a charge and discharge test between the first voltage conversion module and the energy storage module based on the AC power grid to determine the first test result.

[0015] Using the aforementioned technical means, with the first switch module on and the second switch module off, the energy storage module and the first voltage conversion module are connected to perform charge and discharge tests. Thus, by rapidly charging and discharging the energy storage module, mutual testing between the energy storage module and the first voltage conversion module in the circuit loop can be achieved without external charging and discharging equipment, improving testing convenience and reducing testing costs.

[0016] In some embodiments, the integrated energy storage and charging device is used to control the first switch module to turn off and the second switch module to turn on when the first drive signal is at a second level and the second drive signal is at a first level, and to perform a charge and discharge test on the first voltage conversion module, the second voltage conversion module and the energy storage module based on the AC power grid, and to determine the second test result.

[0017] Using the aforementioned technical means, with the first switch module off and the second switch module on, the connection between the energy storage module and the second voltage conversion module is controlled, allowing for charge and discharge testing of the energy storage module, the first voltage conversion module, and the second voltage conversion module. In this way, by rapidly charging and discharging the energy storage module, mutual testing between the energy storage module and the first and second voltage conversion modules in the circuit loop can be achieved without external charging and discharging equipment, improving testing convenience and reducing testing costs.

[0018] In some embodiments, the control module is further configured to send a first drive signal in a first level state to the first switch module and a second drive signal in a second level state to the second switch module when the first test result is normal, so as to control the first switch module to turn on and the second switch module to turn off; the first voltage conversion module is further configured to receive the first grid voltage output from the AC grid, perform voltage conversion on the first grid voltage to obtain a first charging voltage, and provide the first charging voltage to the energy storage module for charging.

[0019] Through the above technical means, when the first test result control module controls the first switch module to be turned on and the second switch module to be turned off, the AC power grid charges the energy storage module through the first voltage conversion module. In this way, the energy storage module is charged only when the first voltage conversion module and the energy storage module are tested and found to be normal, which improves the safety and stability of the energy storage module charging process.

[0020] In some embodiments, the control module is further configured to send a first drive signal in a first level state to the first switch module and a second drive signal in a second level state to the second switch module when the second test result is normal, so as to control the first switch module to turn on and the second switch module to turn off; the energy storage module is further configured to provide a first battery voltage to the second voltage conversion module through the first switch module; the second voltage conversion module is configured to convert the first battery voltage to obtain a second charging voltage and provide the second charging voltage to the device to be charged for charging.

[0021] Using the aforementioned technical means, when the second test result is normal, the first switch module is turned on and the second switch module is turned off, allowing the energy storage module to charge the device to be charged through the second voltage conversion module. This enables the integrated energy storage and charging device to continue supplying power to the device to be charged even when the AC power grid is experiencing peak electricity demand or power outages, thus enriching the application scenarios of the integrated energy storage and charging device.

[0022] In some embodiments, the control module is further configured to send a first drive signal in a second level state to the first switch module and a second drive signal in a second level state to the second switch module when both the first test result and the second test result are normal, so as to control both the first switch module and the second switch module to be turned off; the first voltage conversion module is further configured to receive the second grid voltage output from the AC grid and perform voltage conversion on the second grid voltage to obtain a first conversion voltage; the second voltage conversion module is further configured to perform voltage conversion on the first conversion voltage to obtain a third charging voltage, and provide the third charging voltage to the device to be charged for charging.

[0023] Using the aforementioned technical means, when both the first and second test results are normal, the first and second switch modules are disconnected, allowing the AC power grid to charge the device via the first and second voltage conversion modules. Charging the device only begins after the first, second, and third voltage conversion modules have passed testing, thus improving the safety and stability of the charging process.

[0024] In some embodiments, the control module is further configured to send a first drive signal in a first level state to the first switch module and a second drive signal in a second level state to the second switch module when both the first test result and the second test result are normal, so as to control the first switch module to turn on and the second switch module to turn off; the energy storage module is further configured to provide a second battery voltage to the second voltage conversion module through the first switch module; the first voltage conversion module is further configured to receive a third grid voltage output from the AC grid, perform voltage conversion on the third grid voltage to obtain a second conversion voltage and provide it to the second voltage conversion module; the second voltage conversion module is further configured to receive the second battery voltage and the second conversion voltage, perform voltage conversion on the second battery voltage and the second conversion voltage to obtain a fourth charging voltage, and provide the fourth charging voltage to the device to be charged for charging.

[0025] Using the aforementioned technical means, when both the first and second test results are normal, the first switch module is turned on and the second switch module is turned off, allowing the AC power grid and the energy storage module to simultaneously charge the device. This improves the charging speed and efficiency of the integrated energy storage and charging device.

[0026] In some embodiments, the integrated storage and charging device further includes a communication module connected to the control module; wherein: the communication module is used to receive a first control signal and send the first control signal to the control module; the control module is also used to generate a first drive signal to be sent to the first switch module and a second drive signal to be sent to the second switch module according to the first control signal.

[0027] Through the aforementioned technical means, the control module generates a first driving signal and a second driving signal based on the first control signal sent by the communication module, thereby controlling the opening and closing states of the first and second switch modules, respectively. This allows the first and second switch modules to switch to different opening and closing states under different control modes, improving the convenience and safety of controlling the integrated energy storage and charging device.

[0028] In some embodiments, the control module is further configured to send a second control signal to the first voltage conversion module and a third control signal to the second voltage conversion module; the first voltage conversion module is configured to receive the second control signal and control the voltage conversion of the first voltage conversion module according to the second control signal; the second voltage conversion module is configured to receive the third control signal and control the voltage conversion of the second voltage conversion module according to the third control signal.

[0029] Through the aforementioned technical means, the control module can send a second control signal to the first voltage conversion module to control its voltage conversion; and send a third control signal to the second voltage conversion module to control its voltage conversion. This achieves control over the voltage conversion between the first and second voltage conversion modules, improving the accuracy and stability of the output voltage of the integrated energy storage and charging device.

[0030] Secondly, embodiments of this disclosure provide a charging system, including a charging gun, a device to be charged, and an integrated charging and storage device as described in any of the first aspects, wherein the input end of the charging gun is connected to the output end of the integrated charging and storage device, and the output end of the charging gun is connected to the device to be charged; wherein:

[0031] The integrated energy storage and charging device is used to convert the output voltage of the energy storage module and / or the output voltage of the AC power grid, and then provide the charging voltage obtained after voltage conversion to the device to be charged through the charging gun.

[0032] Using the aforementioned technical means, the integrated energy storage and charging device can charge the device to be charged via a charging gun. Furthermore, the integrated energy storage and charging device can perform mutual testing between the first voltage conversion module, the second voltage conversion module, and the energy storage module without the need for external charging and discharging equipment, thus completing the integrated device testing. The charging gun improves the safety and stability of the charging process of the integrated energy storage and charging device.

[0033] 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

[0034] Figure 1 is a schematic diagram of the composition structure of a charging system provided in an embodiment of this disclosure;

[0035] Figure 2 is a schematic diagram of the composition structure of a charging system provided in an embodiment of this disclosure;

[0036] Figure 3 is a schematic diagram of the composition structure of a charging system provided in an embodiment of this disclosure;

[0037] Figure 4 is a schematic diagram of the composition structure of a charging system provided in an embodiment of this disclosure. Detailed Implementation

[0038] In order 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] The following is a description of the relevant technologies disclosed herein.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] When new energy vehicles use supercharging, a large current of 150-600A is generated. Excessive and intensive charging can lead to excessive instantaneous load on charging stations, causing instability in the power grid. In order to regulate the power load and increase long-term benefits, integrated energy storage and charging units are being used more and more frequently in charging stations, parking lots and other places.

[0049] An integrated energy storage and charging unit generally refers to a photovoltaic-energy storage and charging unit. "Photovoltaic" refers to solar power generation, typically achieved by mounting photovoltaic panels on the roof of the charging equipment. "Energy storage" refers to intelligent battery modules that store electricity, and "charging" refers to charging new energy vehicles. Therefore, an integrated energy storage and charging unit can supply power to the grid or vehicles from the battery modules during peak electricity demand periods, and charge the battery modules and vehicles from the grid during off-peak periods, thus playing a role in peak shaving and valley filling.

[0050] To ensure the stability, reliability, and safety of the integrated charging and storage system, various tests need to be conducted using appropriate equipment, including safety tests and module performance tests. Module performance tests include charge / discharge efficiency tests, cycle life tests, and charging rate tests. These tests require specialized equipment, such as external charging / discharging devices. However, this method of adding external equipment not only increases testing costs but also hinders on-site debugging.

[0051] Based on this, the present disclosure provides an integrated energy storage and charging device and charging system. By controlling the opening and closing states of the first and second switching modules, different circuit loops are formed between the first voltage conversion module, the second voltage conversion module, and the energy storage module, thereby enabling charge and discharge testing of the first voltage conversion module, the second voltage conversion module, and the energy storage module. In this way, the integrated energy storage and charging device can perform charge and discharge tests between its internal modules without the need for additional external charging and discharging equipment, reducing testing costs. Furthermore, the integrated energy storage and charging device is not limited by testing equipment or testing sites, which facilitates on-site debugging and improves testing efficiency.

[0052] The present disclosure will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0053] In one embodiment of this disclosure, FIG1 is a schematic diagram of the composition structure of a charging system provided in this embodiment. As shown in FIG1, the charging system includes an integrated charging and energy storage device 10, which includes a first voltage conversion module 101, a second voltage conversion module 102, an energy storage module 103, a first switch module 104, and a second switch module 105, wherein:

[0054] The input terminal of the first voltage conversion module 101 is connected to the AC power grid 201, the output terminal of the first voltage conversion module 101 is connected to the first terminal of the first switch module 104, and the second terminal of the first switch module 104 is connected to the energy storage module 103.

[0055] The output terminal of the first voltage conversion module 101 is also connected to the input terminal of the second voltage conversion module 102. The output terminal of the second voltage conversion module 102 is connected to the first terminal of the second switch module 105. The second terminal of the second switch module 105 is connected to the energy storage module 103.

[0056] The integrated energy storage and charging device 10 is used to control the opening and closing states of the first switch module 104 and the second switch module 105, and to perform charging and discharging tests between the first voltage conversion module 101, the second voltage conversion module 102 and the energy storage module 103.

[0057] In this embodiment of the disclosure, the integrated energy storage and charging device 10 can be a single integrated energy storage and charging machine or a photovoltaic integrated energy storage and charging machine with photovoltaic cells. It can store energy such as mains power, photovoltaic or diesel as electrical energy in the energy storage module 103, and can also be used as a charging pile or power source to supply power to new energy vehicles or other electrical equipment.

[0058] The first voltage conversion module 101 can convert AC voltage received from AC power grid 201 into DC voltage and output it, or convert AC voltage into DC voltage and supply it to AC power grid. For example, the first voltage conversion module 101 can be a bidirectional AC / DC converter, and can also convert parameters such as current. The second voltage conversion module 102 can boost or buck the input DC voltage to convert it into DC voltage and output it. For example, the second voltage conversion module 102 can be a bidirectional DC / DC converter, and can also convert parameters such as current. In this embodiment, the first voltage conversion module 101 and the second voltage conversion module 102 may include capacitors, inductors, and other devices; their specific structures are not limited herein.

[0059] In this embodiment, the energy storage module 103 can be a battery capable of storing electrical energy in an integrated energy storage and charging device, such as a lithium iron phosphate battery or a lithium-ion battery. The energy storage module 103 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 103 are not limited herein.

[0060] It should be noted that the AC power grid 201 can be a three-phase AC power grid, and its output voltage is generally 150kV. In this embodiment of the present disclosure, the AC power grid 201 is connected to the first voltage conversion module 101, and can convert and output AC voltage to the first voltage conversion module.

[0061] In this embodiment, the first switch module 104 and the second switch module 105 can be electronic components that control the opening or closing of circuits in the integrated charging and storage unit based on drive signals, thereby controlling the current to flow to other circuits. For example, they can be knife switches, or semiconductor devices such as switching transistors, triodes, transistors, IGBTs, and metal-oxide-semiconductor field-effect transistors (MOSFETs or MOS transistors), etc., without any limitation herein.

[0062] In this embodiment of the disclosure, the integrated energy storage and charging unit can form different circuit loops by controlling the first switch module 104 and the second switch module 105 to perform charge and discharge tests on the first voltage conversion module 101, the second voltage conversion module 102 and the energy storage module 103. For example, when the first switch module 104 is on and the second switch module 105 is off, the energy storage module 103 is connected to the first voltage conversion module 101 and disconnected from the second voltage conversion module 102. A circuit can be formed between the AC power grid 201, the first voltage conversion module 101, the first switch module 104, and the energy storage module 103 for charging and discharging tests. When the first switch module 104 is off and the second switch module 105 is on, the energy storage module 103 is disconnected from the first voltage conversion module 101 and connected to the first voltage conversion module 101. A circuit can be formed between the AC power grid 201, the first voltage conversion module 101, the second voltage conversion module 102, and the energy storage module 103 for charging and discharging tests.

[0063] It should be noted that the first switch module 104 and the second switch module 105 have different opening and closing states, forming different circuit loops, and thus conducting mutual charging and discharging tests on different modules in the first voltage conversion module 101, the second voltage conversion module 102 and the energy storage module 103.

[0064] It should also be noted that the charge / discharge test refers to monitoring the input and output parameters of each module in the integrated energy storage and charging device 10 during the charging or discharging process of the energy storage module 103, and testing whether there are any abnormalities in the energy storage module 103, the first voltage conversion module 101, and the second voltage conversion module 102. The input and output parameters can include current, voltage, power, etc.

[0065] This disclosure provides an integrated energy storage and charging device. By controlling the opening and closing states of a first switching module and a second switching module, different circuit loops are formed between a first voltage conversion module, a second voltage conversion module, and an energy storage module, thereby enabling charge and discharge testing of the first voltage conversion module, the second voltage conversion module, and the energy storage module. In this way, the integrated energy storage and charging device can perform charge and discharge tests between its internal modules without the need for additional external charging and discharging equipment, reducing testing costs. Furthermore, the integrated energy storage and charging device is not limited by testing equipment or testing sites, which facilitates on-site debugging and improves testing efficiency.

[0066] In another embodiment of this disclosure, Figure 2 is a schematic diagram of the composition structure of a charging system provided in this embodiment. As shown in Figure 2, the integrated charging and storage device 10 further includes a control module 106. Wherein:

[0067] The control module 106 is used to send a first drive signal to the first switch module 104 and a second drive signal to the second switch module 105.

[0068] The first switch module 104 is used to receive the first drive signal and control the opening and closing state of the first switch module 104 according to the first drive signal.

[0069] The second switch module 105 is used to receive the second drive signal and control the opening and closing state of the second switch module 105 according to the second drive signal.

[0070] In this embodiment of the disclosure, the control module 106 may also be referred to as the integrated storage and charging unit control unit, which 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.

[0071] In this embodiment of the disclosure, the first driving signal is sent by the control module 106 to the first switch module 104 to control the first switch unit to be turned on or off; the second driving signal is sent by the control module 106 to the second switch module 105 to control the second switch unit to be turned on or off.

[0072] It should be noted that the first drive signal can have different level states, corresponding to controlling the first switching unit to be turned on or off; correspondingly, the second drive signal can also have different level states, corresponding to controlling the second switching unit to be turned on or off. The level states of the first drive signal and the second drive signal can be determined according to the module that needs to be tested.

[0073] As shown in Figure 2, the first switching unit may include two switches, used to control the connection between the positive terminal of the energy storage module 103 and the positive terminal of the first voltage conversion module 101, and the connection between the negative terminal of the energy storage module 103 and the negative terminal of the first voltage conversion module 101, respectively. Correspondingly, the second switching unit may also include two switches, used to control the connection between the positive terminal of the energy storage module 103 and the positive terminal of the second voltage conversion module 102, and the connection between the negative terminal of the energy storage module 103 and the negative terminal of the second voltage conversion module 102, respectively. It should be noted that the two switches in the first switching unit have the same on / off state, controlled by a first drive signal; the two switches in the second switching unit have the same on / off state, controlled by a second drive signal.

[0074] This disclosure provides an integrated storage and charging device that sends a first driving signal to a first switching unit to control the first switching unit to turn on or off; and sends a second driving signal to a second switching unit to control the second switching unit to turn on or off. This allows for the formation of different circuit loops, enabling testing to be completed without external equipment, thus improving testing efficiency and convenience.

[0075] In some embodiments, continuing to refer to FIG2, the integrated energy storage and charging device 10 is used to control the first switch module 104 to be turned on and the second switch module 105 to be turned off when the first drive signal is at a first level and the second drive signal is at a second level, and to perform a charge and discharge test between the first voltage conversion module 101 and the energy storage module 103 based on the AC power grid 201 to determine the first test result.

[0076] As mentioned above, different levels of the first driving signal correspond to different states of the first switching unit being on or off. In this embodiment, when the first driving signal is in a first level state, the first switching module 104 is on; when the first driving signal is in a second level state, the first switching module 104 is off. The first level state can be a high level state, and the second level state can be a low level state.

[0077] In this embodiment, when the first switch module 104 is on and the second switch module 105 is off, the energy storage module 103 is connected to the first voltage conversion module 101 through the first switch module 104, and disconnected from the second voltage conversion module 102. In this case, based on the circuit loop composed of the energy storage module 103, the first voltage conversion module 101, and the first switch module 104, a charge-discharge test can be performed between the first voltage conversion module 101 and the energy storage module 103 to determine the first test result.

[0078] For example, the charging test process based on the above circuit loop may include: providing an AC test voltage from the AC power grid 201 to the first voltage conversion module 101, then converting the test voltage from AC to DC to obtain a DC test voltage, which is then output to the energy storage module 103 via a DC bus and a conducting first switch module 104, to perform a charging test on the energy storage module 103. During this process, the control module 106 can determine whether the first voltage conversion module 101 is malfunctioning by monitoring the DC test voltage output by the first voltage conversion module 101; the control module 106 can also determine whether the energy storage module 103 is malfunctioning by monitoring the voltage and current changes of the energy storage module 103.

[0079] For example, the process of performing a discharge test based on the above circuit loop may include: the energy storage module 103 providing a DC test voltage to the first voltage conversion module 101 through the conducting first switch module 104; the first voltage conversion module 101 performing AC / DC conversion on the received DC test voltage to obtain an AC test voltage and transmitting it to the AC power grid 201. During this process, the control module 106 can determine whether the first voltage conversion module 101 is malfunctioning by monitoring the AC test voltage output by the first voltage conversion module 101; the control module 106 can also determine whether the energy storage module 103 is malfunctioning by monitoring the DC test voltage output by the energy storage module 103, as well as the voltage and current changes of the energy storage module 103.

[0080] Based on the above charging and discharging test processes, the first voltage conversion module 101 and the energy storage module 103 can be tested. Specifically, during the charging and discharging test, the energy flow path is as follows: Thus, by rapidly charging and discharging the energy storage module 103 and the first voltage conversion module 101, the charging and discharging tests of the first voltage conversion module 101 and the energy storage module 103 are achieved.

[0081] It should be noted that the first test result can be either a pass (normal) or a fail (abnormal), determined by the control module 106 based on its monitoring of the first voltage conversion module 101 and the energy storage module 103 during the aforementioned charge-discharge test. For example, if the test voltage output by the first voltage conversion module 101 is abnormal, the first test result can be determined as a fail.

[0082] This disclosure provides an integrated energy storage and charging device. When the first switching module is on and the second switching module is off, it controls the connection between the energy storage module and the first voltage conversion module to perform charge and discharge tests on both modules. Thus, by rapidly charging and discharging the energy storage module, mutual testing between the energy storage module and the first voltage conversion module in the circuit loop can be achieved without external charging and discharging equipment, improving testing convenience and reducing testing costs.

[0083] In some embodiments, continuing to refer to FIG2, the integrated energy storage and charging device 10 is used to control the first switch module 104 to turn off and the second switch module 105 to turn on when the first drive signal is in the second level state and the second drive signal is in the first level state, and to perform a charge and discharge test on the first voltage conversion module 101, the second voltage conversion module 102 and the energy storage module 103 based on the AC power grid 201, and determine the second test result.

[0084] As mentioned above, different levels of the second driving signal correspond to different states of the second switching unit being on or off. In this embodiment, when the second driving signal is in the first level state, the second switching module 105 is on; when the second driving signal is in the second level state, the second switching module 105 is off. The first level state can be a high level state, and the second level state can be a low level state.

[0085] In this embodiment, when the first switch module 104 is off and the second switch module 105 is on, the energy storage module 103 is disconnected from the first voltage conversion module 101, and the energy storage module 103 is connected to the second voltage conversion module 102 through the second switch module 105. In this case, a charge-discharge test can be performed on the circuit loop composed of the energy storage module 103, the first voltage conversion module 101, the second voltage conversion module 102, and the second switch module 105 to determine the second test result.

[0086] For example, the charging test process based on the above circuit loop may include: the AC power grid 201 provides an AC test voltage to the first voltage conversion module 101, the first voltage conversion module 101 performs AC / DC conversion on the test voltage to obtain a DC test voltage, which is then output to the second voltage conversion module 102 via a DC bus. The second voltage conversion module 102 performs DC / DC conversion on the DC test voltage to obtain a converted DC test voltage, which is then output to the energy storage module 103 via the second switch module 105 for charging test of the energy storage module 103. During this process, the control module 106 can determine whether the first voltage conversion module 101 is abnormal by monitoring the DC test voltage output by the first voltage conversion module 101; the control module 106 can also determine whether the second voltage conversion module 102 is abnormal by monitoring the converted command test voltage output by the second voltage conversion module 102; and the control module 106 can also monitor the voltage and current changes of the energy storage module 103 to determine whether the energy storage module 103 is abnormal.

[0087] For example, the process of performing a discharge test based on the above circuit loop may include: the energy storage module 103 provides a DC test voltage to the second voltage conversion module 102 through the conducting second switch module 105; the second voltage conversion module 102 performs DC / DC conversion on the received DC test voltage to obtain a converted DC test voltage, which is then transmitted to the first voltage conversion module 101 via the DC bus; the first voltage conversion module 101 performs AC / DC conversion on the converted DC test voltage to obtain an AC test voltage, which is then transmitted to the AC power grid 201. During this process, the control module 106 can determine whether the energy storage module 103 is malfunctioning by monitoring the DC test voltage output by the energy storage module 103, as well as the voltage and current changes of the energy storage module 103; the control module 106 can also determine whether the second voltage conversion module 102 is malfunctioning by monitoring the converted DC test voltage output by the second voltage conversion module 102; and the control module 106 can also determine whether the first voltage conversion module 101 is malfunctioning by monitoring the AC test voltage output by the first voltage conversion module 101.

[0088] Therefore, based on the above charging and discharging test processes, the first voltage conversion module 101, the second voltage conversion module 102, and the energy storage module 103 can be tested. During the charging and discharging test process, the energy flow path is as follows: Thus, by rapidly charging and discharging the energy storage module 103, the first voltage conversion module 101, and the second voltage conversion module 102, the charging and discharging tests of the first voltage conversion module 101, the second voltage conversion module 102, and the energy storage module 103 are achieved.

[0089] It should be noted that the second test result can be either a pass (normal) or a fail (abnormal). This is determined by the control module 106 based on its monitoring of the first voltage conversion module 101, the second voltage conversion module 102, and the energy storage module 103 during the aforementioned charge-discharge test. For example, if the test voltage output by the second voltage conversion module 102 is abnormal, the second test result can be determined as a fail.

[0090] This disclosure provides an integrated energy storage and charging device. When the first switch module is off and the second switch module is on, the device controls the connection between the energy storage module and the second voltage conversion module 102 to perform charge and discharge tests on the energy storage module, the first voltage conversion module, and the second voltage conversion module 102. Thus, by rapidly charging and discharging the energy storage module, without the need for external charging and discharging equipment, mutual testing between the energy storage module and the first and second voltage conversion modules 102 in the circuit loop can be achieved, improving testing convenience and reducing testing costs.

[0091] In another embodiment of this disclosure, referring to FIG2, the control module 106 is further configured to send a first drive signal in a first level state to the first switch module 104 and a second drive signal in a second level state to the second switch module 105 when the first test result is normal, so as to control the first switch module 104 to be turned on and the second switch module 105 to be turned off.

[0092] The first voltage conversion module 101 is also used to receive the first grid voltage output by the AC grid 201, convert the first grid voltage to obtain the first charging voltage, and provide the first charging voltage to the energy storage module 103 for charging.

[0093] In this embodiment, if the first switch module 104 is turned on and the second switch module 105 is turned off during the charge / discharge test in the aforementioned embodiment, and the first test result for the first voltage conversion module 101 and the energy storage module 103 is normal, then it is determined that both the first voltage conversion module 101 and the energy storage module 103 can work normally. In this case, when the integrated charging and storage device 10 is actually used, the control module 106 can control the first switch module 104 to turn on by sending a first drive signal in a first level state to the first switch module 104, and control the second switch module 105 to turn off by sending a second drive signal in a second level state to the second switch module 105, so that the AC power grid 201 charges the energy storage module 103 through the first voltage conversion module 101 and the turned-on first switch module 104.

[0094] It should be noted that the charging process of the energy storage module 103 in the integrated energy storage and charging device 10 in this embodiment of the present disclosure, as well as the charging process of the device to be charged in the following embodiments, can be in the field use scenario when the first test result is normal. The user can click on the interface to set it to be in different test or use scenarios, and then the control module 106 controls each module in the integrated energy storage and charging device 10 based on the preset settings.

[0095] In this embodiment of the disclosure, specifically, the AC power grid 201 first supplies a first grid voltage to the first voltage conversion module 101. After receiving the first grid voltage, the first voltage conversion module 101 performs AC / DC voltage conversion on the first grid voltage to obtain a first charging voltage. Further, the first voltage conversion module 101 supplies the first grid voltage to the energy storage module 103 through the DC bus and the conducting first switch module 104 to charge the energy storage module 103.

[0096] It should be noted that the first grid voltage can be 150kV, and the voltage value of the first conversion voltage can be higher or lower than the first grid voltage, determined based on the charging voltage requirement of the energy storage module 103, and no restrictions are imposed here.

[0097] In this embodiment of the present disclosure, during the charging process of the energy storage module 103, the control module 106 can determine whether the energy storage module 103 has a charging abnormality by monitoring the voltage and current changes of the energy storage module 103, and when a charging abnormality occurs, send a first drive signal in a second level state to the first switch module 104 to disconnect the first switch module 104 and stop charging the energy storage module 103.

[0098] This disclosure provides an integrated energy storage and charging device. When the first test result control module 106 controls the first switch module to be turned on and the second switch module to be turned off, the AC power grid charges the energy storage module through the first voltage conversion module. In this way, the energy storage module is charged only when the first voltage conversion module and the energy storage module are tested and found to be normal, which improves the safety and stability of the energy storage module charging process.

[0099] In some embodiments, continuing to refer to FIG2, the control module 106 is further configured to send a first drive signal in a first level state to the first switch module 104 and a second drive signal in a second level state to the second switch module 105 when the second test result is normal, so as to control the first switch module 104 to be turned on and the second switch module 105 to be turned off.

[0100] The energy storage module 103 is also used to provide a first battery voltage to the second voltage conversion module 102 through the first switch module 104.

[0101] The second voltage conversion module 102 is used to convert the voltage of the first battery to obtain a second charging voltage, and to provide the second charging voltage to the device to be charged 202 for charging.

[0102] In this embodiment, if during the charge / discharge test in the aforementioned embodiments, when the first switch module 104 is turned off and the second switch module 105 is turned on, and the second test results for the first voltage conversion module 101, the second voltage conversion module 102, and the energy storage module 103 are normal, then it is determined that the first voltage conversion module 101, the second voltage conversion module 102, and the energy storage module 103 can all work normally. In this case, when the integrated charging and storage device 10 is actually used, the control module 106 can send a first drive signal in a first level state to the first switch module 104 to control the first switch module 104 to turn on, and send a second drive signal in a second level state to the second switch module 105 to control the second switch module 105 to turn off, so that the energy storage module 103 charges the device 202 to be charged through the DC bus and the second voltage conversion module 102.

[0103] In this embodiment of the disclosure, when the AC power grid 201 experiences a power outage, the AC power grid 201 stops outputting grid voltage to the first voltage conversion module 101, and the energy storage module 103 provides the first battery voltage to the second voltage conversion module 102 through the conducting first switch module 104 and DC bus.

[0104] Furthermore, the second voltage conversion module 102 performs DC / DC conversion on the first battery voltage to obtain a second charging voltage, and provides the second charging voltage to the device to be charged 202 for charging.

[0105] In this embodiment of the disclosure, the control module 106 can determine whether the energy storage module 103 and the second voltage conversion module 102 are abnormal by monitoring the first battery voltage and the second charging voltage, and when an abnormality occurs, control the energy storage module 103 to stop outputting the first battery voltage and stop charging the device to be charged 202.

[0106] This disclosure provides an integrated energy storage and charging device. When the second test result is normal, the device controls the first switch module to turn on and the second switch module to turn off, allowing the energy storage module to charge the device to be charged through the second voltage conversion module. This enables the integrated energy storage and charging device to continue supplying power to the device to be charged even when the AC power grid is experiencing peak electricity demand or power outages, thus enriching the application scenarios of the integrated energy storage and charging device.

[0107] In some embodiments, continuing to refer to FIG2, the control module 106 is further configured to send a first drive signal in a second level state to the first switch module 104 and a second drive signal in a second level state to the second switch module 105 when both the first test result and the second test result are normal, so as to control both the first switch module 104 and the second switch module 105 to be turned off.

[0108] The first voltage conversion module 101 is also used to receive the second grid voltage output by the AC grid 201 and perform voltage conversion on the second grid voltage to obtain the first converted voltage.

[0109] The second voltage conversion module 102 is also used to convert the first conversion voltage to obtain a third charging voltage, and to provide the third charging voltage to the device to be charged 202 for charging.

[0110] In this embodiment, if during the charge / discharge test in the aforementioned embodiment, the first switch module 104 is turned on and the second switch module 105 is turned off, and the first test result is determined to be normal, then the first voltage conversion module 101 and the energy storage module 103 are determined to be functioning normally. Furthermore, if during the charge / discharge test in the aforementioned embodiment, the first switch module 104 is turned off and the second switch module 105 is turned on, and the second test result is determined to be normal, then the second voltage conversion module 102 is determined to be functioning normally as well. That is, the first voltage conversion module 101, the second voltage conversion module 102, and the energy storage module 103 are all functioning normally. In this case, when the integrated charging and storage device 10 is actually used, the control module 106 can send a first drive signal in a second-level state to the first switch module 104 to turn off the first switch module 104, and send a second drive signal in a second-level state to the second switch module 105 to turn off the second switch module 105 as well, so that the AC power grid 201 charges the device 202 to be charged through the first voltage conversion module 101 and the second voltage conversion module 102.

[0111] In this embodiment, the AC power grid 201 first supplies a second grid voltage to the first voltage conversion module 101. The voltage value of the second grid voltage may be the same as or different from the voltage value of the first grid voltage. After receiving the second grid voltage, the first voltage conversion module 101 performs AC / DC voltage conversion on the second grid voltage to obtain a first converted voltage. The voltage value of the first converted voltage may be the same as or different from the aforementioned first charging voltage.

[0112] Furthermore, the first conversion voltage is supplied to the second voltage conversion module 102 via the DC bus. The second voltage conversion module 102 performs DC / DC conversion on the first conversion voltage to obtain the third charging voltage. The third charging voltage can be supplied to the device to be charged 202 to charge the device 202. The device to be charged 202 can be a new energy vehicle or other electrical equipment.

[0113] In this embodiment of the disclosure, during the charging process of the device 202 to be charged, the control module 106 can monitor the first conversion voltage and the third charging voltage to determine whether the first voltage conversion module 101 and the second voltage conversion module 102 are abnormal. When a charging abnormality occurs, the control module 106 controls the abnormal first voltage conversion module 101 or the abnormal second voltage conversion module 102 to stop working, so that the AC power grid 201 cannot continue to charge the device 202 to be charged.

[0114] This disclosure provides an integrated energy storage and charging device. When both the first and second test results are normal, the first and second switch modules are disconnected, allowing the AC power grid 201 to charge the device via the first and second voltage conversion modules. Charging the device only occurs when the first voltage conversion module, energy storage module, and second voltage conversion module are tested and found to be normal, thus improving the safety and stability of the charging process.

[0115] In some embodiments, continuing to refer to FIG2, the control module 106 is further configured to send a first drive signal in a first level state to the first switch module 104 and a second drive signal in a second level state to the second switch module 105 when both the first test result and the second test result are normal, so as to control the first switch module 104 to be turned on and the second switch module 105 to be turned off.

[0116] The energy storage module 103 is also used to provide a second battery voltage to the second voltage conversion module 102 through the first switching module 104.

[0117] The first voltage conversion module 101 is also used to receive the third grid voltage output by the AC grid 201, convert the third grid voltage to obtain the second converted voltage, and provide it to the second voltage conversion module 102.

[0118] The second voltage conversion module 102 is also used to receive the second battery voltage and the second conversion voltage, and to convert the second battery voltage and the second conversion voltage to obtain a fourth charging voltage, and to provide the fourth charging voltage to the device to be charged 202 for charging.

[0119] As mentioned above, if the first test result is normal and the second test result is also normal, then it can be determined that the first voltage conversion module 101, the second voltage conversion module 102, and the energy storage module 103 are all working normally. In this case, when the integrated charging and storage device 10 is actually used, the control module 106 can send a first drive signal in a first level state to the first switch module 104 to control the first switch module 104 to conduct, and send a second drive signal in a second level state to the second switch module 105 to control the second switch module 105 to turn off, so that the AC power grid 201 charges the device 202 to be charged through the first voltage conversion module 101 and the second voltage conversion module 102, and at the same time, the energy storage module 103 also charges the device 202 to be charged through the second voltage conversion module 102.

[0120] In this embodiment, the AC power grid 201 first supplies a third grid voltage to the first voltage conversion module 101. The voltage value of the second grid voltage may be the same as or different from the voltage values ​​of the first and second grid voltages. After receiving the third grid voltage, the first voltage conversion module 101 performs AC / DC voltage conversion to obtain a second converted voltage, which is then supplied to the second voltage conversion module 102. Simultaneously, the energy storage module 103 supplies a second battery voltage to the second voltage conversion module 102 through the activated first switch module 104 and the DC bus.

[0121] Furthermore, the second voltage conversion module 102 connects the received second converted voltage and the second battery voltage in parallel, that is, it performs DC / DC voltage conversion on the sum of the voltage values ​​of the second converted voltage and the second battery voltage to obtain a fourth charging voltage, which is then provided to the device to be charged 202 for charging. In this way, the AC power grid 201 and the energy storage module 103 can simultaneously supply power to the device to be charged 202. Compared with the previous embodiments where the device to be charged 202 is charged only through the AC power grid 201 or only through the energy storage module 103, the simultaneous charging method in this embodiment outputs a higher voltage to the device to be charged 202, reaching 310kV, and the charging time is shorter, thereby realizing the function of fast charging or supercharging.

[0122] In this embodiment of the disclosure, during the charging process of the device 202 to be charged, the control module 106 can determine whether the first voltage conversion module 101, the second voltage conversion module 102 and the energy storage module 103 are abnormal by monitoring the second battery voltage and the second conversion voltage. When a charging abnormality occurs, the control module 106 controls the abnormal first voltage conversion module 101 or the abnormal second voltage conversion module 102 to stop working, or controls the abnormal energy storage module 103 to stop outputting the second battery voltage, so as to stop charging the device 202 to be charged.

[0123] It should be noted that users can select different charging modes on the interactive interface of the integrated charging and storage device 10, such as charging only through the AC power grid 201, charging only through the energy storage module 103, or charging simultaneously through the AC power grid 201 and the energy storage module 103. The control module 106 can control the opening and closing states of the first switch module 104 and the second switch module 105 based on the charging mode selected by the user, as well as control whether the AC power grid 201 is connected and whether the energy storage module 103 outputs battery voltage, so that the integrated charging and storage device 10 can charge the device 202 to be charged in the mode set by the user.

[0124] This disclosure provides an integrated energy storage and charging device. When both the first and second test results are normal, the first switch module is turned on and the second switch module is turned off, allowing the AC power grid and the energy storage module to simultaneously charge the device. This improves the charging speed and efficiency of the integrated energy storage and charging device.

[0125] In another embodiment of this disclosure, Figure 3 is a schematic diagram of the composition structure of a charging system provided in this embodiment. As shown in Figure 3, the integrated charging and storage device 10 further includes a communication module 107, which is connected to the control module 106; wherein:

[0126] The communication module 107 is used to receive the first control signal and send the first control signal to the control module 106.

[0127] The control module 106 is also configured to generate a first drive signal to be sent to the first switch module 104 and a second drive signal to be sent to the second switch module 105 based on the first control signal.

[0128] In this embodiment of the disclosure, the communication module 107 can also be called a wireless communication module. It has communication functions and can receive input parameters and output parameters, such as current and voltage, collected by the control module 106 from the energy storage module 103, the first voltage conversion module 101, and the second voltage conversion module 102, and transmit these parameters to the cloud platform.

[0129] In this embodiment, the communication module 107 can also receive a first control signal from the cloud platform and send it to the control module 106. The control module 106 can generate a first drive signal for controlling the opening and closing of the first switch module 104 and a second drive signal for controlling the opening and closing of the second switch module 105 based on the first control signal. The first control signal can be generated based on user operations on the cloud platform's interactive interface. For example, the user can select different modes for testing different modules or different charging modes, which will correspond to different opening and closing states of the first switch module 104 and the second switch module 105, thereby generating the first control signal accordingly, which is then sent to the control module 106 via the communication module 107.

[0130] This disclosure provides an integrated energy storage and charging device. The control module generates a first driving signal and a second driving signal based on a first control signal sent by the communication module, respectively controlling the opening and closing states of the first switch module 104 and the second switch module. This allows the first switch module 104 and the second switch module to switch to different opening and closing states under different control modes, improving the convenience and safety of controlling the integrated energy storage and charging device.

[0131] In some embodiments, referring further to FIG3, the control module 106 is also configured to send a second control signal to the first voltage conversion module 101 and a third control signal to the second voltage conversion module 102.

[0132] The first voltage conversion module 101 is used to receive the second control signal and control the voltage conversion of the first voltage conversion module 101 according to the second control signal.

[0133] The second voltage conversion module 102 is used to receive the third control signal and control the voltage conversion of the second voltage conversion module 102 according to the third control signal.

[0134] In this embodiment of the present disclosure, the control module 106 can adjust the second control signal accordingly based on the monitoring of the output voltage of the first voltage conversion module 101, and output the second control signal when the output voltage of the first voltage conversion module 101 changes, so as to adjust the voltage conversion amplitude of the first voltage conversion module 101 accordingly, so as to maintain the stability of the output voltage of the first voltage conversion module 101.

[0135] In this embodiment of the disclosure, the control module 106 may also generate a third control signal based on the monitoring feedback of the output voltage of the second voltage conversion module 102, thereby controlling the voltage conversion amplitude of the second voltage conversion module 102 to maintain the stability of the output voltage of the second voltage conversion module 102.

[0136] It should be noted that the first voltage conversion module 101 is equipped with a controller for receiving a second control signal and controlling the magnitude of the increase or decrease in the output voltage of the first voltage conversion module 101 compared to the input voltage based on the second control signal. Correspondingly, the second voltage conversion module 102 is also equipped with a corresponding controller, which can control the magnitude of the increase or decrease in the output voltage of the second voltage conversion module 102 compared to the input voltage based on a third control signal.

[0137] It should also be noted that the control module 106 can determine the voltage conversion amplitude of the first voltage conversion module 101 and the second voltage conversion module 102 according to the output voltage requirements, and generate a second control signal and a third control signal respectively, which are then sent to the first voltage conversion module 101 and the second voltage conversion module 102.

[0138] This disclosure provides an integrated energy storage and charging device. A control module 106 can send a second control signal to a first voltage conversion module to control its voltage conversion, and send a third control signal to a second voltage conversion module to control its voltage conversion. This achieves control over the voltage conversion between the first and second voltage conversion modules, improving the accuracy and stability of the output voltage of the integrated energy storage and charging device.

[0139] In another embodiment of this disclosure, Figure 4 is a schematic diagram of the composition structure of a charging system provided in this embodiment. As shown in Figure 4, the charging system 20 includes a charging gun 203, a device to be charged 202, and a storage and charging integrated device 10 as described in the previous embodiments. The input end of the charging gun 203 is connected to the output end of the storage and charging integrated device 10, and the output end of the charging gun 203 is connected to the device to be charged 202; wherein:

[0140] The integrated energy storage and charging device 10 is used to convert the output voltage of the energy storage module 103 and / or the output voltage of the AC power grid 201, and to provide the charging voltage obtained after voltage conversion to the device to be charged 202 through the charging gun 203 for charging.

[0141] In this embodiment, the input end of the charging gun 203 is connected to the integrated energy storage and charging device 10, and its output end is connected to the device to be charged 202. The device to be charged 202 can be a new energy vehicle. The charging gun 203 can be fixedly connected to the integrated energy storage and charging device 10 as part of the device, or it can be connected to the integrated energy storage and charging device 10 via an interface. When charging the device to be charged 202 is required, the user connects the device to be charged 202 to the integrated energy storage and charging device 10 through the charging gun 203.

[0142] It should be noted that the charging gun 203 can have different output voltage levels and can intelligently and dynamically adjust its output power according to the input power of the device to be charged 202. In addition, the charging gun 203 can provide safety protection for the device to be charged 202 and prevent the integrated charging and storage device 10 from damaging the device to be charged 202 due to short circuit, overvoltage, overcurrent, etc.

[0143] In the embodiments disclosed herein and the foregoing embodiments, a transformer 204 may be provided between the AC power grid 201 and the first voltage conversion module 101, wherein the input terminal of the transformer 204 is the AC power grid 201, and the output terminal of the first transformer U1 is connected to the input terminal of the first voltage conversion module 101.

[0144] In this embodiment of the disclosure, the transformer 204 functions to convert the voltage of the AC power grid 201 into the AC power required by the integrated energy storage and charging device 10. For example, the voltage of the AC power grid is 500kV, 220kV, 110kV, 35kV, 10kV, 6kV, 3kV, etc., which can be converted into 380V AC power by the transformer 204.

[0145] In this embodiment, the integrated energy storage and charging device 10 can support high-power fast charging. That is, compared to the charging method in related technologies that relies solely on the AC power grid 201, this embodiment provides greater charging capacity, thereby improving charging speed.

[0146] It should be noted that when testing the first voltage conversion module 101 and energy storage module 103 in the integrated energy storage and charging device 10 based on the test method in the aforementioned embodiments, when the first switch module 104 is closed and the second switch module 105 is turned off, the path of electrical energy flow is as follows: When testing the second voltage conversion module 102 and energy storage module 103 in the integrated energy storage and charging device 10 based on the test method in the foregoing embodiments, the path of electrical energy flow is as follows: Through the above methods, based on the testing methods in the aforementioned embodiments, rapid charging and discharging between various modules is achieved, enabling mutual detection.

[0147] It should also be noted that the energy storage module 103 and the second voltage conversion module 102 can communicate with each other. When the first switch module 104 is turned off and the second switch module 105 is turned on, and the first voltage conversion module 101, the second voltage conversion module 102 and the energy storage module 103 are being tested, abnormal information or alarm information can be transmitted to the second voltage conversion module 102 based on this communication. After receiving the abnormal information sent by the energy storage module 103, the second voltage conversion module 102 stops working and sends the information of stopping working to the energy storage module 103, thereby preventing the abnormality of the energy storage module 103 from causing damage to other modules.

[0148] This disclosure provides a charging system in which an integrated energy storage and charging device can control the AC power grid to charge a device. The integrated energy storage and charging device can perform mutual testing between the first voltage conversion module, the second voltage conversion module, and the energy storage module without external charging and discharging equipment, thus completing the integrated device test. The charging gun improves the safety and stability of the charging process of the integrated energy storage and charging device.

[0149] 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.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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. A combined energy storage and charging device, comprising a first voltage conversion module, a second voltage conversion module, an energy storage module, a first switching module, and a second switching module, wherein: The input terminal of the first voltage conversion module is connected to the AC power grid, the output terminal of the first voltage conversion module is connected to the first terminal of the first switch module, and the second terminal of the first switch module is connected to the energy storage module. The output terminal of the first voltage conversion module is also connected to the input terminal of the second voltage conversion module, the output terminal of the second voltage conversion module is connected to the first terminal of the second switching module, and the second terminal of the second switching module is connected to the energy storage module. The integrated energy storage and charging device is used to control the opening and closing states of the first switch module and the second switch module, and to perform charge and discharge tests between the first voltage conversion module, the second voltage conversion module and the energy storage module.

2. The integrated storage and charging device according to claim 1, wherein, The integrated storage and charging device also includes a control module; wherein: The control module is used to send a first drive signal to the first switch module and a second drive signal to the second switch module. The first switch module is used to receive the first drive signal and control the opening and closing state of the first switch module according to the first drive signal; The second switch module is used to receive the second drive signal and control the opening and closing state of the second switch module according to the second drive signal.

3. The integrated storage and charging device according to claim 2, wherein, The integrated energy storage and charging device is used to control the first switching module to be turned on and the second switching module to be turned off when the first driving signal is at a first level and the second driving signal is at a second level, and to perform a charge and discharge test between the first voltage conversion module and the energy storage module based on the AC power grid to determine a first test result.

4. The integrated storage and charging device according to claim 2, wherein, The integrated energy storage and charging device is used to control the first switch module to turn off and the second switch module to turn on when the first drive signal is in the second level state and the second drive signal is in the first level state, and to perform charge and discharge tests on the first voltage conversion module, the second voltage conversion module and the energy storage module based on the AC power grid, and to determine the second test result.

5. The integrated storage and charging device according to claim 3, wherein, The control module is further configured to send a first drive signal in a first level state to the first switch module and a second drive signal in a second level state to the second switch module when the first test result is normal, so as to control the first switch module to be turned on and the second switch module to be turned off. The first voltage conversion module is further configured to receive the first grid voltage output by the AC grid, convert the first grid voltage to obtain a first charging voltage, and provide the first charging voltage to the energy storage module for charging.

6. The integrated storage and charging device according to claim 4, wherein, The control module is further configured to send a first drive signal in a first level state to the first switch module and a second drive signal in a second level state to the second switch module when the second test result is normal, so as to control the first switch module to be turned on and the second switch module to be turned off. The energy storage module is also used to provide a first battery voltage to the second voltage conversion module through the first switching module; The second voltage conversion module is used to convert the voltage of the first battery to obtain a second charging voltage, and to provide the second charging voltage to the device to be charged for charging.

7. The integrated storage and charging device according to claim 3 or 4, wherein, The control module is further configured to send a first drive signal in a second level state to the first switch module and a second drive signal in a second level state to the second switch module when both the first test result and the second test result are normal, so as to control both the first switch module and the second switch module to be turned off. The first voltage conversion module is further configured to receive the second grid voltage output from the AC grid, and convert the second grid voltage to obtain a first converted voltage; The second voltage conversion module is further configured to convert the first conversion voltage to obtain a third charging voltage, and provide the third charging voltage to the device to be charged for charging.

8. The integrated storage and charging device according to claim 3 or 4, wherein, The control module is further configured to send a first drive signal in a first level state to the first switch module and a second drive signal in a second level state to the second switch module when both the first test result and the second test result are normal, so as to control the first switch module to be turned on and the second switch module to be turned off. The energy storage module is also used to provide a second battery voltage to the second voltage conversion module through the first switching module; The first voltage conversion module is further configured to receive the third grid voltage output from the AC grid, convert the third grid voltage to obtain a second converted voltage, and provide it to the second voltage conversion module; The second voltage conversion module is further configured to receive the second battery voltage and the second conversion voltage, convert the second battery voltage and the second conversion voltage to obtain a fourth charging voltage, and provide the fourth charging voltage to the device to be charged for charging.

9. The integrated storage and charging device according to any one of claims 2 to 8, wherein, The integrated storage and charging device further includes a communication module, which is connected to the control module; wherein: The communication module is used to receive a first control signal and send the first control signal to the control module; The control module is further configured to generate, based on the first control signal, a first drive signal to be sent to the first switch module and a second drive signal to be sent to the second switch module.

10. The integrated storage and charging device according to any one of claims 2 to 9, wherein, The control module is further configured to send a second control signal to the first voltage conversion module and a third control signal to the second voltage conversion module; The first voltage conversion module is configured to receive the second control signal and control the voltage conversion of the first voltage conversion module according to the second control signal; The second voltage conversion module is used to receive the third control signal and control the voltage conversion of the second voltage conversion module according to the third control signal.

11. The integrated storage and charging device according to any one of claims 2 to 10, wherein, The input terminal of the first voltage conversion module is connected to the output terminal of the transformer, and the input terminal of the transformer is connected to the AC power grid.

12. A charging system comprising a charging gun, a device to be charged, and an integrated charging and storage device as described in any one of claims 1 to 11, wherein the input end of the charging gun is connected to the output end of the integrated charging and storage device, and the output end of the charging gun is connected to the device to be charged; wherein: The integrated energy storage and charging device is used to convert the output voltage of the energy storage module and / or the output voltage of the AC power grid, and to provide the charging voltage obtained after the voltage conversion to the device to be charged through the charging gun.

Images