A voltage adaptive detachable energy storage system

Abstract

The utility model relates to the technical field of energy storage, disclose a kind of voltage self-adapting detachable energy storage system, including energy storage device, energy storage device includes shell, inside is provided with accommodating cavity;Several energy storage units are respectively arranged in the accommodating cavity, and several energy storage units are connected with external power grid respectively;Auxiliary module is arranged in the accommodating cavity, when the energy storage unit is connected with external power grid, the auxiliary module is used to assist the energy storage unit operation;A kind of voltage self-adapting detachable energy storage system includes multiple energy storage devices.The utility model solves the deficiency of existing energy storage system in capacity, voltage fixed cannot expand etc., capacity flexible adjustable, voltage flexible adjustable, dismounting is simple, improves energy storage system utilization, saves cost.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a voltage-adaptive detachable energy storage system. Background Technology

[0002] Current energy storage systems can be categorized by capacity into small, medium, and large-scale systems. Small-scale systems (hereinafter referred to as "small storage devices") are primarily used by industrial and commercial users. However, many large-scale manufacturing enterprises require both distributed installation of small power stations at the load end and adjustments to the installation location and capacity of energy storage systems based on production output. These enterprises also have their own substations or switching stations with varying voltage levels. Distributed small energy storage power stations typically operate at AC 400V and can be directly connected to the AC 400V grid. Substations or switching stations typically operate at 6kV, 10kV, etc., making direct grid connection of small energy storage systems impossible. However, using large-scale grid connection requires additional transformers, increasing equipment and site costs.

[0003] Current small, medium, and large energy storage systems can only have a single capacity and grid connection voltage, which are determined during the design and manufacturing stages. If users need to change the capacity and grid connection voltage due to changes in the usage environment, they have to purchase new equipment, resulting in wasted costs.

[0004] Therefore, there is an urgent need for a voltage-adaptive detachable energy storage system to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a voltage-adaptive detachable energy storage system to solve the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a voltage-adaptive detachable energy storage system.

[0007] include:

[0008] Energy storage device, the energy storage device comprising: a housing having an internal receiving cavity;

[0009] Several energy storage units are respectively installed in the cavity, and each of the energy storage units is connected to the external power grid.

[0010] An auxiliary module is disposed within the receiving cavity. When the energy storage unit is connected to the external power grid, the auxiliary module is used to assist the operation of the energy storage unit.

[0011] According to the present invention, a voltage-adaptive detachable energy storage system is provided, wherein the energy storage unit includes a battery cluster and an energy storage converter, and the battery cluster and the energy storage converter are connected in parallel to form a circuit.

[0012] According to the present invention, a voltage-adaptive detachable energy storage system is provided, wherein a filter circuit and a soft-start circuit are installed on the circuit.

[0013] According to the present invention, a voltage-adaptive detachable energy storage system is provided, wherein the auxiliary module includes a battery management module for collecting circuit data and controlling the charging / discharging of the battery clusters based on the data; a monitoring module for monitoring the circuit; and a protection module for protecting the circuit.

[0014] According to the present invention, a voltage-adaptive detachable energy storage system is provided, wherein the voltage of the external power grid is 400V.

[0015] A voltage-adaptive detachable energy storage system includes several energy storage devices.

[0016] When there is only one energy storage device, the energy storage device operates independently and is connected to the external power grid.

[0017] When there are two energy storage devices, the two energy storage devices are connected in parallel and connected to the external power grid.

[0018] When there are multiple energy storage devices, the multiple energy storage devices are cascaded and connected to the external power grid.

[0019] According to the present invention, a voltage-adaptive detachable energy storage system further includes a control strategy module for managing the system's operating logic and calculation methods; a system management module for managing the energy storage system according to the control strategy module; a communication module for transmitting information of the energy storage devices to the control strategy module; and a voltage equalization circuit installed in the receiving cavity, wherein the voltage equalization circuit is used to ensure that each energy storage device bears a balanced voltage when multiple energy storage devices are cascaded.

[0020] According to the present invention, a voltage-adaptive detachable energy storage system further includes a base, the top of which supports multiple energy storage devices in a cascaded configuration via insulators, and the voltage of the base is adapted to the cascade voltage.

[0021] According to the present invention, a voltage-adaptive detachable energy storage system is provided, wherein a voltage-equalizing resistor is connected in parallel between the terminals of several energy storage units, and a bypass switch is provided between the voltage-equalizing resistor and the terminals. When operating individually or in parallel, the bypass switch is in the open state; when operating in cascaded mode, the bypass switch is in the closed state.

[0022] According to the present invention, a voltage-adaptive detachable energy storage system is provided, which operates in cascade mode with an external grid voltage of 6KV-35KV.

[0023] Compared with the prior art, the present invention has the following advantages and technical effects:

[0024] This invention provides a voltage-adaptive, detachable energy storage system. The energy storage device can be independently connected to the grid, or multiple units can be cascaded and connected to a higher voltage level. This overcomes the shortcomings of existing energy storage systems, such as fixed capacity and voltage that cannot be expanded. It offers a flexible energy storage solution with adjustable capacity and voltage, and simple installation and disassembly, improving the utilization rate of the energy storage system. Furthermore, it has advantages such as easy integration and installation, and low space requirements, making it suitable for industrial and commercial applications in large factories and mines. It can also be applied to other energy storage environments, providing users with stable power support and promoting the application of renewable energy and the efficient use of energy. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the energy storage device of this utility model;

[0027] Figure 2 This is a schematic diagram of the parallel operation mode of the energy storage device of this utility model;

[0028] Figure 3 This is a schematic diagram illustrating the cascaded operation mode of the energy storage device of this utility model.

[0029] Figure 4 This is a schematic diagram of the mounting base for the cascaded energy storage system of this utility model;

[0030] Figure 5 This is a schematic diagram of the voltage equalization resistor of this utility model;

[0031] Figure 6 This is a communication topology diagram of the cascaded method of this utility model. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figures 1-6 This utility model provides a voltage-adaptive detachable energy storage system, comprising:

[0035] An energy storage device, comprising: a housing with an internal cavity;

[0036] Several energy storage units are respectively installed in the containment cavity, and each of the energy storage units is connected to the external power grid.

[0037] The auxiliary module, located inside the housing cavity, is used to assist the energy storage unit in operation when the energy storage unit is connected to the external power grid.

[0038] As an alternative implementation, the energy storage unit includes a battery cluster and an energy storage converter, which are connected in parallel to form a circuit.

[0039] As an optional implementation, a filter circuit and a soft-start circuit are installed on the circuit.

[0040] As an optional implementation, the auxiliary module includes a battery management module for collecting circuit data and controlling the charging / discharging of the battery clusters based on the data; a monitoring module for monitoring the circuit; and a protection module for protecting the circuit.

[0041] As an optional implementation, the voltage of the external power grid is 400V.

[0042] A voltage-adaptive detachable energy storage system includes several energy storage devices.

[0043] When there is only one energy storage device, the energy storage device operates independently and is connected to the external power grid.

[0044] When there are two energy storage devices, the two energy storage devices operate in parallel and are connected to the external power grid.

[0045] When there are multiple energy storage devices, they are cascaded and connected to the external power grid.

[0046] Specifically, the main circuit connection of the energy storage system includes three operating states: the first is the single-unit state, where each energy storage device is an independent and complete energy storage system that can be independently connected to the 400V distribution network; the second is the parallel operation mode; and the third is the cascaded operation mode. Before operation, settings are made through the controller panel. In the cascaded operation mode, several energy storage devices are connected in a three-phase cascade manner, and can be cascaded to different voltage levels as needed, such as 6kV, 10kV, etc.

[0047] As an optional implementation, it also includes a control strategy module for managing the system's operating logic and calculation methods; a system management module for managing the energy storage system according to the control strategy module; a communication module for transmitting information from the energy storage devices to the control strategy module; and a voltage equalization circuit installed in the containment cavity, which is used to ensure that each energy storage device experiences voltage balance when multiple energy storage devices are cascaded.

[0048] Specifically, the voltage equalization circuit is installed inside the energy storage device to ensure voltage balance for each energy storage device in the case of cascaded energy storage devices; the system management module is installed inside the main energy storage device and is the brain of the entire system. It consists of a computer system mainly composed of a high-speed data processor and is the carrier for the system software to run. It manages the normal operation of the entire system according to the control strategy; the communication module is used for real-time information exchange between the system management module and each energy storage device. The system management module performs calculations based on the information received from the energy storage devices and applies the control strategy. It then sends instructions to each energy storage device through communication to adjust the operating status of each energy storage device in real time.

[0049] The control strategy refers to the logic and its operational methods used to manage the normal operation of the entire system.

[0050] As an optional implementation, it also includes a base, the top of which supports multiple energy storage devices in the cascade configuration via insulators, and the base voltage is adapted to the cascade voltage.

[0051] Specifically, due to the increased voltage level in cascade operation, the insulation needs to be upgraded. This is achieved by constructing a base, which is supported by insulators corresponding to the operating voltage of the cascade operation. For example, if the cascade voltage is 6kV, the base voltage level is designed to be 6kV; if the insulation voltage level is 10kV, the base insulation voltage level is 10kV.

[0052] As an optional implementation, a voltage equalization resistor is connected in parallel between the terminals of several energy storage units, and a bypass switch is provided between the voltage equalization resistor and the terminals. When operating individually or in parallel, the bypass switch is in the open state; when operating in cascaded mode, the bypass switch is in the closed state.

[0053] Specifically, the voltage equalization method involves connecting a voltage equalization resistor in parallel between terminals A, a, B, b, C, and c.

[0054] As an optional implementation method, when cascading, the external grid voltage is 6KV-35KV.

[0055] Reference Figure 6 Specifically, in the cascaded mode, high-speed fiber optic communication is used to meet the requirements of timeliness and speed. The topology is such that the main controller is installed in one of the energy storage devices. The main controller issues commands to make each energy storage device work simultaneously to ensure normal charging and discharging. At the same time, it monitors the operating status of each device and issues a command to stop charging and discharging when one or more energy storage devices fail.

[0056] This application provides a voltage-adaptive, detachable energy storage system. For large factories and mines, or other users with high power loads, there is usually a substation or switching station with a high voltage level (6kV-35kV) within the factory, and multiple transformers in the factory area. The load of each individual transformer changes continuously according to production conditions. The energy storage device of this application can be independently connected to the grid, or multiple units can be cascaded to connect to a higher voltage level (6kV, 10kV, etc.). This solves the shortcomings of existing energy storage systems in terms of fixed capacity and voltage, and inability to expand. It provides an energy storage solution with flexible and adjustable capacity and voltage, and simple installation and disassembly, improving the utilization rate of the energy storage system. In addition, it has the advantages of easy integration and installation, and low site space requirements. It is suitable for industrial and commercial applications in large factories and mines, and can also be applied to other energy storage application environments, providing users with stable power support and promoting the application of renewable energy and the efficient use of energy.

[0057] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0058] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A voltage-adaptive, dismountable energy storage system, characterized in that, include: Energy storage device, the energy storage device comprising: a housing having an internal receiving cavity; Several energy storage units are respectively installed in the cavity, and each of the energy storage units is connected to the external power grid. An auxiliary module is disposed within the receiving cavity. When the energy storage unit is connected to the external power grid, the auxiliary module is used to assist the operation of the energy storage unit. The energy storage unit includes a battery cluster and an energy storage converter, which are connected in parallel to form a circuit. The auxiliary module includes a battery management module for collecting circuit data and controlling the charging / discharging of the battery cluster based on the data; a monitoring module for monitoring the circuit; and a protection module for protecting the circuit. When there is only one energy storage device, the energy storage device operates independently and is connected to the external power grid. When there are two energy storage devices, the two energy storage devices are connected in parallel and connected to the external power grid. When there are multiple energy storage devices, the multiple energy storage devices are cascaded and connected to the external power grid. It also includes a control strategy module for managing the system's operating logic and calculation methods; a system management module for managing the energy storage system according to the control strategy module; a communication module for transmitting information from the energy storage devices to the control strategy module; a voltage equalization circuit installed in the housing cavity, which ensures voltage balance for each energy storage device when multiple energy storage devices are cascaded; a base, the top of which supports multiple energy storage devices in the cascaded configuration via insulators, the base voltage being compatible with the cascade voltage; and a voltage equalization resistor connected in parallel between the terminals of several energy storage units, with a bypass switch between the voltage equalization resistor and the terminals. During individual and parallel operation, the bypass switch is in the open state; during cascade operation, the bypass switch is in the closed state.

2. A voltage-adaptable removable energy storage system according to claim 1, characterized in that: The circuit is equipped with a filter circuit and a soft-start circuit.

3. The voltage-adaptive detachable energy storage system according to claim 1, characterized in that: The voltage of the external power grid is 400V.

4. The voltage-adaptive detachable energy storage system according to claim 1, characterized in that: When cascaded, the external grid voltage is 6KV-35KV.

Images