Energy storage standby power supply device

Abstract

The utility model provides an energy storage standby power supply device, which is provided with a battery cabin and an electrical cabin, the battery cabin comprises a plurality of battery modules, and the battery modules are connected in series; the electrical cabin is provided with a high-voltage box, a conversion module, a switching module and a control module, the high-voltage box and the conversion module are arranged up and down, the conversion module and the switching module are arranged up and down, the switching module and the control module are arranged up and down, each battery module is connected with a high-voltage box bus, and the high-voltage box is in circuit connection with the conversion module. The conversion module is in circuit connection with the switching module, and the control module is in bus connection with the high-voltage box, the conversion module and the switching module, so that on the basis of voltage conversion of the conversion module and branch switching of the switching module, back-and-forth switching between power transmission of a power grid and power supply of the battery module can be realized quickly and flexibly in the form of a main circuit; interference of an inverter circuit on power transmission of a power grid is reduced, and stability and reliability of power supply of the energy storage standby power supply device are provided.

Description

Technical Field

[0001] This utility model relates to the field of energy storage, and in particular to an energy storage backup power supply device. Background Technology

[0002] As power grids grow larger and more complex, occasional line faults become inevitable. Power outages can severely impact sensitive loads, leading to shutdowns, restarts, data loss, and product defects, causing significant economic losses and safety hazards for users.

[0003] Currently, in existing technologies, the backup power supply used after a power grid failure is generally an online uninterruptible power supply (UPS). However, the UPS main circuit has two inverter circuits, which reduces the power supply efficiency to the load, increases equipment costs, and makes it impossible to quickly and flexibly switch between grid power transmission and backup power supply, thereby reducing the stability and reliability of the energy storage backup power supply. Utility Model Content

[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide an energy storage backup power device that can quickly and flexibly switch between grid power transmission and battery module power supply in the form of a main circuit based on the voltage transformation of the conversion module and the branch switching of the switching module, thereby reducing the interference of the inverter circuit to the grid power transmission and providing stability and reliability of the power supply of the energy storage backup power device.

[0005] To achieve the above objectives, in a first aspect, this utility model provides an energy storage backup power supply device, comprising:

[0006] The battery compartment includes multiple battery modules connected in series.

[0007] The electrical compartment contains a high-voltage box, a conversion module, a switching module, and a control module. The high-voltage box and the conversion module are positioned vertically, as are the conversion module and the switching module, and the switching module and the control module. The high-voltage box controls the charging and discharging function of the battery module. The conversion module converts the AC power input from the grid into DC power of the rated voltage or converts the DC power output from the battery module into DC power of the rated voltage. The switching module switches the power supply from the grid or the battery module to the electrical equipment. The control module controls the high-voltage box, the conversion module, and the switching module.

[0008] Each battery module is connected to the high-voltage box bus, the high-voltage box is connected to the conversion module circuit, the conversion module is connected to the switching module circuit, and the control module is connected to the high-voltage box, conversion module, and switching module bus respectively.

[0009] Furthermore, in some embodiments, the electrical compartment is also provided with an output module, which is arranged vertically above the control module. The output module is used to output the electrical energy of the battery module to the electrical equipment, and the output module is connected to the conversion module circuit.

[0010] Furthermore, in some embodiments, the electrical compartment is also provided with an input module, which is located on one side of the output module. The input module is used to receive input electrical energy from the power grid and transmit the input electrical energy to the battery module or electrical equipment. The output module is circuitally connected to the switching module.

[0011] Furthermore, in some embodiments, the electrical compartment is also provided with a bypass module, which is located below the output module and the input module. One end of the bypass module is connected to the output module circuit, and the other end of the bypass module is connected to the input module circuit. The bypass module is used to keep the electrical equipment running normally during the maintenance or testing of the energy storage backup power device.

[0012] Furthermore, in some embodiments, the electrical compartment is also equipped with a lightning protection module, which is located between the output module and the input module. The lightning protection module is electrically connected to the bypass module and is used to absorb and discharge high-voltage electrical energy.

[0013] Furthermore, in some embodiments, the electrical compartment is also provided with a control power module, which is arranged vertically above the control module. The control power module is electrically connected to the control module and is used to provide power to the control module.

[0014] Furthermore, in some embodiments, the battery compartment is also equipped with a cooler, which is located on the side wall of the battery compartment. The cooler's cold air outlet is positioned opposite to the battery module, and the cooler is used to dissipate heat from the battery module.

[0015] Furthermore, in some embodiments, each battery module is connected to the high-voltage box via a CAN bus, and the control module is connected to the high-voltage box, the conversion module, and the switching module via a CAN bus.

[0016] According to an embodiment of the present invention, an energy storage backup power supply device has at least the following beneficial effects: It includes a battery compartment and an electrical compartment. The battery compartment includes multiple battery modules connected in series. The electrical compartment includes a high-voltage box, a conversion module, a switching module, and a control module. The high-voltage box and the conversion module are arranged vertically, as are the conversion module and the switching module, and the switching module and the control module. The high-voltage box controls the charging and discharging functions of the battery modules. The conversion module converts AC power input from the grid into DC power at a rated voltage or converts DC power output from the battery modules into DC power at a rated voltage. The switching module switches the power supply from the grid or the battery modules to the electrical equipment. The control module controls the high-voltage box, the conversion module, and the switching module. Each battery module is connected to the high-voltage box bus, the high-voltage box is connected to the conversion module circuit, the conversion module is connected to the switching module circuit, and the control module is connected to the high-voltage box, conversion module, and switching module bus respectively. Thus, based on the voltage conversion of the conversion module and the branch switching of the switching module, it can quickly and flexibly switch between grid power transmission and battery module power supply in the form of main circuit, reducing the interference of inverter circuit to grid power transmission and providing stability and reliability of power supply for energy storage backup power device.

[0017] Other features and advantages of this invention will be set forth in the following description and will be apparent in part from the description. The objectives and other advantages of this invention can be realized and obtained through the structures particularly pointed out in the description and the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0020] Figure 1 This is an overall structural diagram of the energy storage backup power supply device provided in some embodiments of this utility model;

[0021] Figure 2 This is a circuit diagram of an energy storage backup power supply device provided in some embodiments of this utility model.

[0022] Reference numerals: Battery compartment 10, Battery module 11, Cooler 12, Electrical compartment 20, High-voltage box 21, Transformer module 22, Switching module 23, Control module 24, Output module 25, Input module 26, Bypass module 27, Lightning protection module 28, Control power module 29. Detailed Implementation

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0024] In the description of this utility model, the use of "first" and "second" is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0026] In existing technologies, the backup power supply used after a power grid failure is generally an online uninterruptible power supply (UPS). However, the UPS main circuit has two inverter circuits, which reduces the power supply efficiency to the load, increases equipment costs, and makes it impossible to quickly and flexibly switch between grid power supply and backup power supply, thereby reducing the stability and reliability of the energy storage backup power supply.

[0027] Based on this, this utility model embodiment provides an energy storage backup power device, which includes a battery compartment and an electrical compartment. The battery compartment includes multiple battery modules connected in series. The electrical compartment includes a high-voltage box, a conversion module, a switching module, and a control module. The high-voltage box and the conversion module are arranged vertically, as are the conversion module and the switching module, and the switching module and the control module. The high-voltage box controls the charging and discharging functions of the battery modules. The conversion module converts AC power input from the grid into DC power of the rated voltage or converts DC power output from the battery modules into DC power of the rated voltage. The switching module switches the power supply from the grid or the battery modules to the electrical equipment. The control module controls the high-voltage box, the conversion module, and the switching module. Each battery module is connected to the high-voltage box bus, the high-voltage box is connected to the conversion module circuit, the conversion module is connected to the switching module circuit, and the control module is connected to the high-voltage box, conversion module, and switching module bus respectively. Thus, based on the voltage conversion of the conversion module and the branch switching of the switching module, it can quickly and flexibly switch between grid power transmission and battery module power supply in the form of main circuit, reducing the interference of inverter circuit to grid power transmission and providing stability and reliability of power supply for energy storage backup power device.

[0028] Therefore, the embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0029] Reference Figure 1 As shown, Figure 1 This is an overall structural diagram of the energy storage backup power supply device provided in some embodiments of this utility model. Figure 2 This is a circuit diagram of an energy storage backup power supply device provided in some embodiments of the present invention. The energy storage backup power supply device includes a battery compartment 10 and an electrical compartment 20. The battery compartment 10 includes multiple battery modules 11, which are connected in series. The electrical compartment 20 is provided with a high-voltage box 21, a conversion module 22, a switching module 23, and a control module 24. The high-voltage box 21 and the conversion module 22 are arranged vertically, the conversion module 22 and the switching module 23 are arranged vertically, and the switching module 23 and the control module 24 are arranged vertically. The high-voltage box 21 is used to control the charging and discharging function of the battery modules 11. The conversion module 22 is used to convert the AC power input from the grid into DC power of the rated voltage or to convert the DC power output from the battery modules 11 into DC power of the rated voltage. The switching module 23 is used to switch the power grid or the battery modules 11 to supply power to the electrical equipment. The control module 24 is used to control the high-voltage box 21, the conversion module 22, and the switching module 23. The battery modules 11 are used to provide power to the electrical equipment when the grid fails or is unstable.

[0030] Each battery module 11 is connected to the high-voltage box 21 via a bus. The high-voltage box 21 is connected to the conversion module 22 via a circuit. The conversion module 22 is connected to the switching module 23 via a circuit. The control module 24 is connected to the high-voltage box 21, the conversion module 22, and the switching module 23 via a bus.

[0031] It should be noted that each battery module 11 is connected to the high-voltage box 21 via a CAN bus, and the control module 24 is connected to the high-voltage box 21, the conversion module 22, and the switching module 23 via a CAN bus.

[0032] It should be noted that the battery compartment 10 serves as a housing and protective structure for the battery module 11. The battery compartment 10 provides a safe, stable, dust-free, waterproof, and fireproof environment for the battery module 11, thereby ensuring that the battery module 11 operates under optimal conditions. At the same time, the battery compartment 10 can also effectively prevent the battery module 11 from being subjected to external impacts and damage.

[0033] Furthermore, the electrical compartment 20 is used to house and manage the electrical equipment and lines in the system. The electrical compartment 20 provides a centralized management and maintenance space for the high-voltage box 21, conversion module 22, switching module 23 and control module 24, making the installation, commissioning and maintenance of the energy storage backup power device more convenient. The electrical compartment 20 can also effectively prevent the electrical equipment and lines from being affected by external interference and damage.

[0034] Meanwhile, the high-voltage box 21 is also equipped with various power protection devices, which can prevent abnormal situations such as overcharging, over-discharging, overcurrent and short circuit from occurring in the energy storage backup power device.

[0035] Furthermore, the electrical compartment 20 is also equipped with an output module 25, which is positioned vertically above the control module 24. The output module 25 is used to output the electrical energy from the battery module 11 to the electrical equipment. The output module 25 is electrically connected to the conversion module 22.

[0036] Furthermore, the electrical compartment 20 is also equipped with an input module 26, which is located on one side of the output module 25. The input module 26 is used to receive the input electrical energy from the power grid and transmit the input electrical energy to the battery module 11 or electrical equipment. The output module 25 is electrically connected to the switching module 23.

[0037] Furthermore, the electrical compartment 20 is also equipped with a bypass module 27, which is located below the output module 25 and the input module 26. One end of the bypass module 27 is connected to the output module 25, and the other end of the bypass module 27 is connected to the input module 26. The bypass module 27 is used to keep the electrical equipment running normally during the maintenance or testing of the energy storage backup power device.

[0038] It should be noted that when the energy storage backup power device is under maintenance, the output module 25 can prevent the reverse power supply protection function of the bypass module 27.

[0039] It should be noted that when the power grid is in a normal state, the input module 26, the switching module 23 and the output module 25 are all in a closed state, the bypass module 27 is in a disconnected state, the power grid is connected to the energy storage backup power device and provides power to the electrical equipment, the control module 24 controls the conversion module 22 to charge the battery module 11 according to the detected state of the battery module 11, thereby replenishing the battery module 11's power to balance the overall power demand of the energy storage backup power device.

[0040] Furthermore, when a grid fault occurs, the intelligent control algorithm of the control module 24 immediately disconnects the switching module 23 with a switching time of ≤1ms, so as to isolate the energy storage backup power device from the grid. At this time, the switching module 22 is in off-grid mode to control the battery module 11 to discharge, thereby enabling the energy storage backup power device to output current with constant frequency and constant voltage, providing a stable and reliable power supply to the electrical equipment until the grid returns to normal, ensuring the continuity of power supply to the electrical equipment.

[0041] Furthermore, when the power grid returns to normal, the switching module 23 detects that the power grid is normal, calculates the frequency, phase, and amplitude of the power grid voltage, and sends the power grid voltage, frequency, phase, and amplitude signals to the control module 24 via the CAN bus. The control module 24 automatically adjusts the output voltage and frequency of the conversion module 22 to synchronize with the power grid according to the signals. Then, the switching module 23 closes quickly, and the conversion module 22 switches to grid-connected mode to reconnect the energy storage system with the power grid, thereby realizing seamless switching between power grid transmission and power supply from the battery module 11.

[0042] Furthermore, the electrical compartment 20 is also equipped with a lightning protection module 28, which is located between the output module 25 and the input module 26. The lightning protection module 28 is electrically connected to the bypass module 27. The lightning protection module 28 is used to absorb and discharge high-voltage electrical energy, thereby preventing overvoltage damage to the energy storage backup power device caused by natural disasters such as lightning. This protects the key equipment and lines in the energy storage backup power device from lightning strikes and improves the safety and reliability of the energy storage backup power device.

[0043] Furthermore, the electrical compartment 20 is also equipped with a control power module 29, which is positioned vertically above the control module 24. The control power module 29 is electrically connected to the control module 24 and is used to provide power to the control module 24, ensuring the reliable operation of the energy storage backup power device.

[0044] Furthermore, the battery compartment 10 is also equipped with a cooler 12, which is located on the side wall of the battery compartment 10. The cold air outlet of the cooler 12 is positioned opposite to the battery module 11. The cooler 12 is used to dissipate heat from the battery module 11, thereby ensuring that the battery module 11 and other key components operate within a suitable temperature range, and providing stability and reliability of the energy storage backup power device.

[0045] It should be understood that in this utility model, "at least one (item)" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0046] In the several embodiments provided by this utility model, it should be understood that the disclosed system and principle method can be implemented in other ways. For example, the system embodiments described above are merely illustrative. For instance, the division of the above units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0047] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0048] Furthermore, in the various embodiments of this utility model, the functional units can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0049] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this utility model, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this utility model.

[0050] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An energy storage backup power supply device, characterized in that, include: A battery compartment, comprising multiple battery modules connected in series between the battery modules; The electrical compartment includes a high-voltage box, a conversion module, a switching module, and a control module. The high-voltage box and the conversion module are positioned vertically relative to each other, as are the conversion module and the switching module, and the switching module and the control module. The high-voltage box controls the charging and discharging function of the battery module. The conversion module converts AC power input from the power grid into DC power at the rated voltage or converts DC power output from the battery module into DC power at the rated voltage. The switching module switches the power grid or the battery module to supply power to electrical equipment. The control module controls the high-voltage box, the conversion module, and the switching module. Each of the battery modules is connected to the high-voltage box bus, the high-voltage box is connected to the conversion module circuit, the conversion module is connected to the switching module circuit, and the control module is connected to the high-voltage box, the conversion module, and the switching module bus respectively.

2. The energy storage backup power supply device according to claim 1, characterized in that, The electrical compartment is also equipped with an output module, which is positioned vertically above the control module. The output module is used to output the electrical energy of the battery module to the electrical equipment, and the output module is connected to the conversion module circuit.

3. The energy storage backup power supply device according to claim 2, characterized in that, The electrical compartment is also equipped with an input module, which is located on one side of the output module. The input module is used to receive electrical energy from the power grid and transmit the electrical energy to the battery module or electrical equipment. The output module is circuitally connected to the switching module.

4. The energy storage backup power supply device according to claim 3, characterized in that, The electrical compartment is also equipped with a bypass module, which is located below the output module and the input module. One end of the bypass module is connected to the output module circuit, and the other end of the bypass module is connected to the input module circuit. The bypass module is used to keep the electrical equipment running normally when the energy storage backup power device is under maintenance or testing.

5. The energy storage backup power supply device according to claim 4, characterized in that, The electrical compartment is also equipped with a lightning protection module, which is located between the output module and the input module. The lightning protection module is electrically connected to the bypass module and is used to absorb and release high-voltage electrical energy.

6. The energy storage backup power supply device according to claim 1, characterized in that, The electrical compartment is also equipped with a control power module, which is positioned vertically above the control module. The control power module is electrically connected to the control module and is used to provide power to the control module.

7. The energy storage backup power supply device according to claim 1, characterized in that, The battery compartment is also equipped with a cooler, which is located on the side wall of the battery compartment. The cooler's air outlet is positioned opposite to the battery module, and the cooler is used to dissipate heat from the battery module.

8. The energy storage backup power supply device according to claim 1, characterized in that, Each of the battery modules is connected to the high-voltage box via a CAN bus, and the control module is connected to the high-voltage box, the conversion module, and the switching module via a CAN bus.

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