Intelligently deployed energy storage converter device

Abstract

The application relates to an intelligent deployment energy storage converter, which comprises a battery pack and a bidirectional converter module connected through a DC bus, a protection circuit and a control circuit, a DC output end of the battery pack is connected with a DC input end of the bidirectional converter module, an AC output port of the bidirectional converter module is connected with a power supply bus and then connected with a load circuit, the power supply bus is further connected with a main power supply, the battery pack and the bidirectional converter module form a bidirectional conversion power path; a DC output end of the protection circuit is connected with a DC input end of the bidirectional converter module through the DC bus, the protection circuit further has a DC input end and a DC output end; the control circuit is connected with the main power supply, the control circuit is connected with the protection circuit, the battery pack and the bidirectional converter module through a control bus to form a control communication path. The application constructs an AC-DC-AC power supply structure with seamless switching of multiple power supplies, and realizes seamless conversion of controlled switching.

Description

Technical Field

[0001] This application relates to an energy storage and converter device, and more particularly to an intelligent energy storage and converter device. Background Technology

[0002] An energy storage converter is a device in an electrochemical energy storage system that connects the battery system to the power grid to provide continuous power. When the energy storage converter is operating in voltage source mode and connected to the grid, it can still operate and supply power uninterruptedly when the grid power supply fails. However, when the failed grid power supply is restored or another backup power supply is connected and supplies power, the voltage, frequency, and phase are often inconsistent with the current voltage, frequency, and phase of the operating energy storage converter, which can cause the connection and power supply system to fail.

[0003] Therefore, it is necessary to design an intelligent energy storage and converter device that can provide stable power supply during power outage recovery and prevent power system paralysis. Summary of the Invention

[0004] The purpose of this application is to propose an intelligent energy storage converter that improves the stability of the power supply system during the power outage and power restoration process.

[0005] This application is implemented as follows: The intelligent energy storage and converter device includes a battery pack and a bidirectional converter module connected via a DC bus, as well as a protection circuit and a control circuit. The DC output terminal of the battery pack is connected to the DC input terminal of the bidirectional converter module. The output terminal of the bidirectional converter module is an AC output port, which is connected to the power supply bus and then to the load circuit. The power supply bus is also connected to the main power supply. The battery pack and the bidirectional converter module constitute a bidirectional converter power path. The DC output terminal of the protection circuit is connected to the DC input terminal of the bidirectional converter module via the DC bus. The protection circuit also has one DC input terminal and one DC output terminal. The control circuit is connected to the main power supply. The control circuit is connected to the protection circuit, the battery pack, and the bidirectional converter module via the control bus to form a control communication path.

[0006] Among them, the DC input terminal of the protection circuit is connected to the electronic control switch after passing through the protection circuit, and then connected to the bidirectional converter module after passing through the DC bus. The output terminal of the bidirectional converter module is output to the power supply bus, forming the second DC power supply converter path.

[0007] The DC input terminal of the protection circuit is connected to the battery pack via the DC output terminal after passing through the protection circuit, thus forming a DC power transfer path.

[0008] The battery pack includes a first battery pack and a second battery pack connected in parallel. The DC output terminals of the first battery pack and the second battery pack are connected to the DC input terminal of the bidirectional converter module via a DC bus after being connected to an electronic control switch.

[0009] The battery pack includes a first battery pack and a second battery pack connected in parallel. The DC output terminals of the first battery pack and the second battery pack are connected to the DC input terminals of the first bidirectional converter module and the second bidirectional converter module, respectively. The two bidirectional converter modules are connected in parallel to the power supply bus. An electronic control switch is installed on the power supply bus between the two bidirectional converter modules. Another electronic control switch is connected in the connection line between the first battery pack and the first bidirectional converter module and the second battery pack and the second bidirectional converter module.

[0010] By implementing the above technical solution, this application utilizes the technical characteristic of bidirectional converter modules that can still operate and supply power without interruption when encountering grid power failure during grid-connected operation in voltage source mode. By controlling the electronic control switch to realize system structure changes, a multi-power seamless switching AC-DC-AC power supply structure is constructed. When the grid power failure is repaired and power supply is restored or the backup power supply is available for access, controlled switching seamless conversion is realized. Attached Figure Description

[0011] The specific structure of this application is given by the following figures and embodiments:

[0012] Figure 1 This is a structural schematic diagram of the present application in the form of a single battery pack;

[0013] Figure 2 This is a schematic diagram of the structure of this application in the form of a multi-battery pack. Detailed Implementation

[0014] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0015] 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 application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0016] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0017] It should be understood that the terms "center", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0019] In this application, "and / or" is merely a way of describing the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0020] It should be noted that in this application, the words "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of words such as "in some embodiments," "exemplarily," and "for example" is intended to present related concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0021] Example: Figure 1-2As shown, the intelligent energy storage and converter device includes a battery pack and a bidirectional converter module connected via a DC bus, as well as a protection circuit and a control circuit. The DC output terminal of the battery pack is connected to the DC input terminal of the bidirectional converter module. The output terminal of the bidirectional converter module is an AC output port, which is connected to the power supply bus and then to the load circuit. The power supply bus is also connected to the main power supply. The battery pack and the bidirectional converter module constitute a bidirectional converter power path. The DC output terminal of the protection circuit is connected to the DC input terminal of the bidirectional converter module via the DC bus. The protection circuit also has one DC input terminal and another DC output terminal. The control circuit is connected to the main power supply. The control circuit is connected to the protection circuit, the battery pack, and the bidirectional converter module via the control bus to form a control communication path.

[0022] Among them, the DC input terminal of the protection circuit is connected to the electronic control switch after passing through the protection circuit, and then connected to the bidirectional converter module after passing through the DC bus. The output terminal of the bidirectional converter module is output to the power supply bus, forming the second DC power supply converter path.

[0023] The DC input terminal of the protection circuit is connected to the battery pack via the DC output terminal after passing through the protection circuit, thus forming a DC power transfer path.

[0024] The battery pack, bidirectional converter module, protection circuit, and control circuit in this application are all existing technologies. The protection circuit is used for overcurrent protection, and the control circuit is used to control the operation of other components and electronic switches, as well as to monitor the status of components. The circuits of these components are not the inventive point of this application and will not be described in detail here.

[0025] Furthermore, such as Figure 1 As shown, the battery pack includes a first battery pack and a second battery pack connected in parallel. The DC output terminals of the first battery pack and the second battery pack are connected to the DC input terminal of the bidirectional converter module via a DC bus after being connected to an electronic control switch.

[0026] Furthermore, the control circuit is connected to the electronic switch circuit. The control circuit can control the opening and closing of the electronic switch, thereby controlling...

[0027] In this configuration, the main power supply continuously supplies power to the load, while at least one electronically controlled switch in the first and second battery banks is closed. When the main power supply fails, at least one of the first and second battery banks continues to supply power to the load, maintaining a seamless and uninterrupted power supply.

[0028] Furthermore, such as Figure 2As shown, the battery pack includes a first battery pack and a second battery pack connected in parallel. The DC output terminals of the first battery pack and the second battery pack are connected to the DC input terminals of the first bidirectional converter module and the second bidirectional converter module, respectively. The two bidirectional converter modules are connected in parallel to the power supply bus. An electronic control switch is installed on the power supply bus between the two bidirectional converter modules. Another electronic control switch is connected in the connection line between the first battery pack and the first bidirectional converter module and the second battery pack and the second bidirectional converter module. The two electronic control switches are controlled by a control circuit.

[0029] In this configuration, the main power supply continuously supplies power to the load. The electronic control switch between the two bidirectional converter modules is normally closed, while the other electronic control switch can be selectively closed or opened. When the main power supply fails, the electronic control switch between the two bidirectional converter modules is opened, ensuring that at least the second battery pack continues to supply power to the load, maintaining a seamless and uninterrupted power supply. When the second battery pack is nearly fully discharged, the other electronic control switch is closed, allowing the first battery pack to continue supplying power to the load.

[0030] The above technical features constitute the embodiments of this application, which have strong adaptability and implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A smart energy storage converter, characterized in that: The system includes a battery pack and a bidirectional converter module connected via a DC bus, as well as protection and control circuits. The DC output terminal of the battery pack is connected to the DC input terminal of the bidirectional converter module. The output terminal of the bidirectional converter module is an AC output port, which is connected to the power supply bus and then to the load circuit. The power supply bus is also connected to the main power supply. The battery pack and the bidirectional converter module constitute a bidirectional converter power path. The DC output terminal of the protection circuit is connected to the DC input terminal of the bidirectional converter module via the DC bus. The protection circuit also has one DC input terminal and another DC output terminal. The control circuit is connected to the main power supply. The control circuit is connected to the protection circuit, the battery pack, and the bidirectional converter module via the control bus, forming a control communication path. Among them, the DC input terminal of the protection circuit is connected to the electronic control switch after passing through the protection circuit, and then connected to the bidirectional converter module after passing through the DC bus. The output terminal of the bidirectional converter module is output to the power supply bus, forming the second DC power supply converter path. The other DC input terminal of the protection circuit is output to the battery pack via the DC output terminal after passing through the protection circuit, thus forming a DC power transfer path.

2. The intelligent energy storage and converter device according to claim 1, characterized in that: The battery pack includes a first battery pack and a second battery pack connected in parallel. The DC output terminals of the first battery pack and the second battery pack are connected to the DC input terminal of the bidirectional converter module via a DC bus after being connected to an electronic control switch.

3. The intelligent energy storage converter according to claim 1, characterized in that: The battery pack includes a first battery pack and a second battery pack connected in parallel. The DC output terminals of the first battery pack and the second battery pack are connected to the DC input terminals of the first bidirectional converter module and the second bidirectional converter module, respectively. The two bidirectional converter modules are connected in parallel to the power supply bus. An electronic control switch is installed on the power supply bus between the two bidirectional converter modules. Another electronic control switch is connected in the connection line between the first battery pack and the first bidirectional converter module and the second battery pack and the second bidirectional converter module.

4. The intelligent energy storage converter according to claim 2 or 3, characterized in that: The electronically controlled switch is connected to the control circuit and its on / off state is controlled by the control circuit.

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