An energy storage system

Abstract

The application discloses an energy storage system, comprising at least one energy storage subunit, each of the energy storage subunit comprising: N battery cabins, each of the battery cabin being provided with a battery, wherein N is a positive integer and N>1; M boost converter cabins, each of the N battery cabins being connected to the M boost converter cabins, the battery capacity of each of the battery cabins being matched with the rated power of the boost converter cabin, and each of the boost converter cabins being configured to perform electric energy transmission between the corresponding connected battery and power grid, wherein M is a positive integer, M>1, and M is less than or equal to N; and a centralized power distribution cabin, the centralized power distribution cabin comprising at least one functional component, the functional component comprising a battery monitoring component, the battery monitoring component being electrically connected to each of the battery cabin, and the battery monitoring component being configured to perform charge and discharge management on the battery in each of the battery cabin.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and more particularly to an energy storage system. Background Technology

[0002] Electrochemical energy storage systems are a technology that stores energy through chemical batteries. These systems typically include battery packs, a battery management system (BMS), a power conversion system (PCS), an energy management system (EMS), a fire suppression system, and a temperature control system. Electrochemical energy storage systems can store electrical energy in batteries and release it when needed, thus achieving the storage and utilization of electrical energy.

[0003] Currently, energy storage systems typically consist of independent battery compartments and boost converter compartments. Batteries are stored in the battery compartments, while the boost converter compartments convert the DC power supplied by the battery compartments into AC power that can be connected to the power grid. Generally, the boost converter compartment in an energy storage system is connected to one or two battery compartments.

[0004] However, in energy storage systems using related technologies, system maintenance is difficult and costly when facing long-term energy storage scenarios of 8 hours or more. Summary of the Invention

[0005] This application discloses an energy storage system that can meet long-term energy storage and charging / discharging needs, and is easy to maintain and has low cost.

[0006] To achieve the above objectives, embodiments of this application disclose an energy storage system, including at least one energy storage partition unit, wherein a single energy storage partition unit includes: A battery compartment, wherein there are N battery compartments, and each battery compartment contains a battery, wherein N is a positive integer and N > 1; The system includes M boost converter modules, with N battery modules correspondingly connected to each of the M boost converter modules. The battery capacity of each battery module is matched with the rated power of the boost converter module. Each boost converter module is configured to transmit electrical energy between the corresponding connected battery and the power grid. M is a positive integer, M≥1, and M<=N. A centralized power distribution compartment includes at least one functional component, including a battery monitoring component electrically connected to each of the battery compartments, and configured to manage the charging and discharging of the batteries in each of the battery compartments.

[0007] Optionally, N is a multiple of M, and each of the boost converter compartments is connected to N / M of the battery compartments.

[0008] This configuration ensures that the load on each booster converter is roughly the same, avoiding situations where some booster converters are overloaded while others are idle, thus improving the efficiency and reliability of the energy storage zoning unit.

[0009] Optionally, the battery capacity of a single battery compartment and the rated power of the boost converter compartment are equal or integer multiples of each other.

[0010] This configuration ensures the scalability of the energy storage compartment units while enabling the boost converter to operate at its rated power, thus achieving high conversion efficiency. At the same time, by setting the battery capacity of a single battery compartment to be an integer multiple of the rated power of the boost converter, the discharge time of the energy storage compartment units can be increased exponentially.

[0011] Optionally, the battery monitoring component includes a battery management system (BMS) main control board and an energy management system. Both the BMS main control board and the energy management system are connected to each of the battery compartments and are used to control the charging and discharging of the batteries in each of the battery compartments.

[0012] With this configuration, the BMS main control board and energy management system can ensure that the batteries in each battery compartment operate in a safe state, while also controlling the charging and discharging of the batteries in the battery compartments by combining the information obtained about the batteries in the battery compartments with external demands. This achieves a more economical and efficient operation of the energy storage compartment units while fully ensuring their safety.

[0013] Optionally, the battery compartment further includes a BMS slave control board, which is electrically connected to the BMS master control board and configured to send the status information of the battery in the battery compartment to the BMS master control board.

[0014] With this configuration, the BMS slave control board can monitor the batteries in the battery compartment in real time, so that the BMS master control board can obtain the battery status information. As a result, the status information of batteries distributed in various battery compartments can be obtained in the centralized power distribution compartment, and these distributed batteries can be centrally controlled; while for the energy storage partition unit, the convenience of its monitoring and operation is improved.

[0015] Optionally, the booster converter includes: A converter compartment includes a plurality of converters, each of the plurality of converters being electrically connected to at least one of the plurality of battery compartments, and the number of battery compartments electrically connected to each converter being the same. A transformer room, including a transformer, wherein multiple converters are connected to the transformer; The high-voltage chamber is used to provide the electrical connection between the transformer and the power grid.

[0016] This configuration enables AC / DC conversion and voltage conversion, as well as grid connection control, within the boost converter compartment. Furthermore, it ensures balanced load distribution across all converters within the boost converter compartment and achieves centralized processing of voltage conversion.

[0017] Optionally, the power supply terminal of the centralized power distribution compartment is electrically connected to the booster converter compartment, so that the booster converter compartment supplies power to at least one of the functional components.

[0018] With this configuration, the energy storage partition unit can be self-powered without relying on the external power grid; at the same time, the battery monitoring components can be directly powered through the boost converter compartment, reducing dependence on external power supply, and the system has high independence and reliability.

[0019] Optionally, the functional components may further include at least one of fire protection components, temperature control system power distribution components, and auxiliary power supply components; The fire suppression system is configured to extinguish at least the fire in the battery compartment; The temperature control system power distribution components are configured to supply power to the liquid cooling unit, which is used to maintain the internal temperature of the battery compartment within a preset operating temperature range. The auxiliary power supply component is configured to provide auxiliary power to the energy storage system when the energy storage system is disconnected from the power grid.

[0020] This setup achieves the following objectives: maintaining stable temperature within the battery compartment and ensuring the smooth operation of all functions within the energy storage unit during grid outages. Furthermore, the fire suppression components, temperature control system power distribution components, and auxiliary power supply components are all housed in a centralized power distribution compartment, resulting in a high degree of concentration of functional components within a single energy storage unit. This reduces equipment redundancy, improves equipment reliability, and facilitates subsequent management and maintenance.

[0021] Optionally, the functional component includes a fire-fighting component, which includes a fire control unit and a fire-fighting medium container, the fire control unit being configured to deliver the fire-fighting medium in the fire-fighting medium container to at least one of the battery compartments.

[0022] This configuration allows the fire suppression system to quickly extinguish fires within the battery compartment, preventing the fire from spreading and ensuring the safety of the energy storage units. Furthermore, the fire suppression medium container is independently located in the centralized power distribution compartment, reducing equipment redundancy, lowering costs, and facilitating maintenance and replacement.

[0023] Optionally, the battery compartment has a fire detector and a fire pipe. The fire pipe of each battery compartment is connected to the fire-fighting medium container. The fire detector is electrically connected to the fire control unit and is used to detect the fire status of the batteries in the battery compartment. The fire control unit is configured to, when the fire detector detects a fire in the battery, control the fire-fighting medium container to deliver fire-fighting medium into the fire-fighting pipe corresponding to the burning battery compartment.

[0024] With this setup, in the event of a fire in the battery compartment, the fire suppression system can rely on the distributed fire detectors to detect and monitor the fire, accurately locate the battery compartment where the fire occurred, and use the fire suppression pipelines to quickly and precisely extinguish the fire in the battery compartment, preventing the fire from spreading and thus fully ensuring the safety of the energy storage compartment unit.

[0025] Optionally, the amount of fire-fighting medium stored in the fire-fighting medium container is greater than or equal to the fire-fighting demand of a single battery compartment, and the amount of fire-fighting medium stored in the fire-fighting medium container is less than or equal to 50% of the total fire-fighting demand of the N battery compartments.

[0026] With this configuration, in the event of a fire in the battery compartment, the amount of fire-fighting medium in the fire-fighting medium container can fully meet the fire-fighting needs, enabling the fire to be extinguished quickly; at the same time, it reduces the amount of fire-fighting medium required by a single energy storage unit, effectively saving costs.

[0027] Optionally, the functional components also include the auxiliary power supply component, with each of the battery compartments and other functional components electrically connected to the auxiliary power supply component, which is configured to provide auxiliary power to each of the functional components and each of the battery compartments.

[0028] With this setup, the uninterruptible power supply (UPS) system is located in the centralized power distribution compartment, eliminating the need to install separate UPS systems in each battery compartment to power each battery compartment. This effectively avoids the complex design of the UPS system and saves on the cost of the energy storage system. In addition, the external power supply, as a backup power source, can fully ensure the reliability of the power supply to the energy storage compartment units.

[0029] Optionally, the functional components also include the temperature control system power distribution component, which includes at least one power supply circuit. The power supply end of the power supply circuit is configured to be connected to the boost converter compartment or an independent power supply. The power supply circuit is used to connect to the liquid cooling unit to supply power to the liquid cooling unit.

[0030] This configuration ensures the reliable operation of a high-power temperature control system; and by setting the independent power supply from the outside and the power from the boost converter compartment as backups for each other, the stability of the temperature control system can be fully ensured.

[0031] Optionally, in a single energy storage partition unit, multiple battery compartments are located on the same side of the boost converter compartment and the power distribution compartment in the horizontal direction; or, in a single energy storage partition, multiple battery compartments are located on opposite sides of the boost converter compartment and the centralized power distribution compartment in the horizontal direction.

[0032] This configuration allows for flexible arrangement of the battery compartment based on the ease of actual use and maintenance, optimizing the layout of the battery compartment and reducing the space resources occupied by the entire energy storage unit.

[0033] Optionally, the boost converter compartment and the centralized power distribution compartment are spaced apart from the battery compartment.

[0034] This configuration avoids the mixing of AC and DC power within a single energy storage unit, thereby reducing the occurrence of electrical arcing during the operation of the energy storage unit. Furthermore, by isolating the boost converter compartment and the centralized power distribution compartment from the battery compartment, it is possible to prevent electrical arcing from encountering flammable gases that may be released from the battery, thus avoiding combustion and explosion accidents and improving equipment safety redundancy.

[0035] Compared with the prior art, the beneficial effects of this application are at least as follows: The energy storage system provided in this application includes one or more AC-side coupled and independently operating energy storage partition units, which facilitates flexible expansion of the energy storage system and improves its reliability. Each energy storage partition unit contains M boost converter compartments and N battery compartments. By setting the battery capacity of each battery compartment to match the rated power of each boost converter compartment, the individual energy storage partitions of the energy storage system can safely and efficiently achieve long-term charging and discharging. Simultaneously, by setting a centralized power distribution compartment within each energy storage partition unit, individual control of each battery compartment is avoided, reducing the complexity of energy storage system control. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1This is a schematic diagram showing the arrangement of a single energy storage partition unit in an energy storage system according to an embodiment of this application; Figure 2 This is a connection diagram of a single energy storage partition unit of an energy storage system according to an embodiment of this application; Figure 3 This is a circuit diagram of a single energy storage partition unit of an energy storage system according to an embodiment of this application; Figure 4 This is a circuit diagram of a battery cell within a single energy storage partition unit of an energy storage system according to an embodiment of this application; Figure 5 This is a schematic diagram of the centralized power distribution compartment circuit within a single energy storage zone unit of an energy storage system according to an embodiment of this application; Figure 6 This is a schematic diagram of the junction monitoring cabinet; Figure 7 A schematic diagram of the circuitry within the UPS input / output monitoring power distribution cabinet; Figure 8 A schematic diagram of the battery management system and energy management system monitoring cabinet; Figure 9 This is a schematic diagram of the booster transformer chamber within a single energy storage zone unit of an energy storage system according to an embodiment of this application; Figure 10 This is a schematic diagram of the centralized power distribution compartment within a single energy storage zone unit of an energy storage system according to an embodiment of this application; Figure 11 This is a schematic diagram of the structure of a single energy storage partition unit of another energy storage system according to an embodiment of this application; Figure 12 This is a schematic diagram of the structure of a single energy storage partition unit in another energy storage system according to an embodiment of this application.

[0038] Explanation of reference numerals in the attached figures: 1-Energy storage system; 100-Energy storage zone unit; 10 - Battery compartment; 20 - Boost converter compartment; 30 - Centralized power distribution compartment; 101-Battery cluster; 102-Fuse; 103-Surge protection device; 104-Circuit breaker; 105-Precharge protection circuit; 106-Fuse; 107-Current sensing device; 108-Disconnecting switch; 110 - Battery cell; 111 - Battery control circuit; 21-Converter room; 22-Transformer room; 23-High voltage room; 201-Converter; 202-Transformer; 203-First lightning arrester; 204-First current transformer; 205-Second current transformer; 206-Second lightning arrester; 207-First live indication device; 208-Vacuum circuit breaker; 209-Disconnecting switch; 210-Grounding switch; 211-Second live indication device; 31-Battery monitoring component; 32-Fire protection component; 33-Temperature control system power distribution component; 34-Auxiliary power supply component; 301 - Transformer in centralized power distribution compartment; 302 - Current transformer; 303 - External power supply; 310 - Combiner monitoring cabinet; 311 - DC / DC power supply module; 312 - Fiber optic switch; 313 - IO module; 314 - BMS main control board; 315 - Emergency stop button; 316 - Control circuit; 320 - UPS input / output monitoring power distribution cabinet; 321 - Automatic transfer switch; 322 - UPS; 323 - Surge protection device; 324 - Backup battery; 330 - Battery Management System and Energy Management System Monitoring Cabinet; 331 - EMS; 332 - BMS Display and Control; 333 - Local Layer Data Network Switch; 334 - Local Layer Control Network Switch; 335 - BMS Downstream Fiber Optic Switch; 336 - Video System Switch. Detailed Implementation

[0039] 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 of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0040] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0041] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0042] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0043] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0044] Energy storage systems typically consist of independent battery compartments and boost converter compartments. Batteries are stored in the battery compartments, which are equipped with independent battery management systems to manage the batteries. The boost converter compartments contain components such as energy storage converters and are used to boost and convert the DC power supplied by the battery compartments into AC power that can be connected to the grid. To increase the energy storage capacity of the system, a "one-to-many" architecture can be adopted, where one boost converter compartment is paired with two or more parallel battery compartments, and the boost converter compartment receives power from these two or more battery compartments, enabling it to perform the energy conversion. This design increases the system's energy capacity and thus improves the charging and discharging time.

[0045] However, when facing long-term energy storage scenarios of 8 hours or more, the "M-to-N" architecture will have a large number of battery compartments, each of which will operate and be maintained independently. This is not conducive to the monitoring and management of the entire system, and the operation and maintenance costs are high.

[0046] This application provides an energy storage system that may include one or more energy storage partition units. Each energy storage partition unit includes M boost converter modules housing multiple battery compartments and a centralized power distribution module. The centralized power distribution module integrates some monitoring and management functions of each battery compartment, allowing the management and control of multiple battery compartments to be realized in a single module, eliminating the need for decentralized control and management of each battery compartment separately. Therefore, the energy storage system of this application can centralize the monitoring and management functions that were originally distributed across various battery compartments, achieving coordinated control of the energy storage system, and providing convenient and low-cost maintenance.

[0047] The energy storage system described in this application can be applied to large factories, commercial parks, data centers, or mining companies and other critical infrastructure to ensure power security, and these applications are not listed here.

[0048] like Figure 1 and Figure 2 The figures shown are a schematic diagram of the arrangement and connection relationship of a single energy storage partition unit 100 of an energy storage system 1 according to an embodiment of this application, wherein, Figure 1 The two adjacent battery compartments 10 are labeled A and B respectively to distinguish them. For example... Figure 3 The diagram shown is a circuit diagram of a single energy storage partition unit 100 of an energy storage system 1 according to an embodiment of this application. Figure 4 This is a circuit diagram of the battery unit 110 in the energy storage partition unit 100; Figure 5 This is a schematic diagram of the circuitry within the centralized power distribution compartment 30. The energy storage system 1 according to this application may include at least one energy storage partition unit 100. One or more energy storage partition units 100 are coupled on the AC side and operate independently, facilitating flexible subsequent expansion of the energy storage system 1 and improving its reliability. Figures 1 to 5 As shown, a single energy storage partition unit 100 may include: The system comprises: a battery compartment 10, which can consist of N compartments, each containing a battery, where N is a positive integer and N > 1; a boost converter compartment 20, which can consist of M compartments, where the N battery compartments 10 are respectively connected to the M boost converter compartments 20, and the battery capacity of each battery compartment 10 is matched with the rated power of the boost converter compartment 20; each boost converter compartment 20 is configured to transmit power between the corresponding connected battery and the power grid, where M is a positive integer, M ≥ 1, and M ≤ N; and a centralized power distribution compartment 30, which can include at least one functional component, including a battery monitoring component 31; the battery monitoring component 31 is electrically connected to each battery compartment 10 and is used to manage the charging and discharging of the batteries in each battery compartment 10.

[0049] In the aforementioned energy storage system 1, the energy storage partition unit 100 serves as the basic unit in the system, independently realizing energy storage, power conversion, and monitoring and management functions. Multiple energy storage partition units 100 can be coupled and connected to the AC bus on the AC side to centrally supply power to the grid side.

[0050] Each energy storage partition unit 100 specifically includes N battery compartments 10 and M boost converter compartments 20. Since each boost converter compartment 20 is connected to at least one battery compartment 10, M is less than or equal to N. Each battery compartment 10 contains batteries for storing electrical energy. These battery compartments 10 are connected to one of the M boost converter compartments 20 in the energy storage partition unit 100, so that the boost converter compartment 20 provides connection for the batteries in each battery compartment 10 and realizes the voltage and AC / DC conversion between the batteries in the battery compartment 10 and the power grid, thereby enabling the battery's electrical energy to be output to the power grid or other external electrical devices. The battery monitoring component 31 in the centralized power distribution compartment 30 can centrally manage the charging and discharging of the batteries in each battery compartment 10 and ensure that the batteries in each battery compartment 10 within the energy storage partition unit 10 operate safely and efficiently.

[0051] In this application, for a single energy storage partition unit 100, during the charging process, the AC power from the grid is converted to match the voltage of the battery compartment 10 through the boost converter 20, and the AC power is converted to DC power. The battery monitoring component 31 in the centralized power distribution compartment 30 distributes the DC power to each battery compartment 10 based on the status of the batteries in the battery compartment 10, so that the DC power can be safely stored in the batteries in the battery compartment 10. During the discharging process, the battery monitoring component 31 assigns a discharging task to each battery compartment 10 based on the status of the batteries in each battery compartment 10. The DC power output by the battery compartment 10 is converted to AC power compatible with the grid through the boost converter and then fed into the grid. By integrating the battery monitoring component 31, which is used to manage the charging and discharging of the batteries, into the centralized power distribution compartment 30, the batteries in each battery compartment 10 can be uniformly monitored and managed using the centralized power distribution compartment 30. This avoids the need for separate control of each battery compartment 10, simplifies the structure of each battery compartment 10, and reduces the number of hardware and cables. The operation, control, and maintenance of the entire system can be completed in the centralized power distribution compartment 30, making the control and maintenance of the energy storage system 1 more convenient and cost-effective.

[0052] In addition, the centralized power distribution compartment 30 may also include other functional components, so that the fire protection, temperature control and other functions of each battery compartment 10 in the energy storage system 1 can be uniformly realized in the centralized power distribution compartment 30.

[0053] It should be noted that in this application, the battery capacity of a single battery compartment 10 is matched with the rated power of the boost converter compartment 20, so that the power of each boost converter compartment 20 during operation will be matched with the battery capacity of a single battery compartment 10. Specifically, during the entire charging and discharging process, multiple battery compartments 10 connected in parallel to the same boost converter compartment 20 can be charged and discharged simultaneously. Since the power of a single boost converter compartment 20 is matched with the battery capacity of a single battery compartment 10, when the number of battery compartments 10 connected in parallel to the boost converter compartment 20 is N, for example, N=8, a single energy storage partition unit 100 can achieve 8 hours of charging and discharging. It is worth noting that when a single energy storage partition unit 100 includes M boost converter compartments 20, if the N battery compartments 10 are evenly connected to the M boost converter compartments 20, the charging and discharging time of a single energy storage partition is N / M hours. By setting the power of each boost converter 20 to be related to the battery capacity of a single battery compartment 10, overload of the discharge power of a single battery compartment 10 can be avoided. At the same time, a balance is sought between the lifespan, power, and heat generation of the battery compartment 10, ensuring that the system operates in a relatively healthy manner.

[0054] In one possible implementation, N can be set to a multiple of M, and each boost converter 20 is connected to M / N battery compartments 10.

[0055] Since the number N of battery compartments 10 is a multiple of the number M of boost converter compartments 20, and each battery compartment 10 is connected to only one boost converter compartment 20, N battery compartments 10 can be connected to M boost converter compartments 20 on an even basis, that is, a single boost converter compartment 20 is connected to N / M battery compartments.

[0056] By setting N to a multiple of M, each boost converter 20 is connected to the same number of battery compartments 10, ensuring that the load on each boost converter 20 is approximately the same. This avoids some boost converter 20 being overloaded while others are idle, thereby improving the efficiency and reliability of the energy storage partition unit 100.

[0057] In one possible implementation, the battery capacity of a single battery compartment 10 can be equal to the rated power of the boost converter 20. Since the power of a single energy storage unit 100 is determined by the specifications of the boost converter 20, when the boost converter 20 operates at a power level equal to the battery capacity of the battery compartment 10, the runtime of the energy storage unit 100 can be determined by the number of battery compartments 10 mounted on the boost converter 20. This means that a single battery compartment 10 can be independently expanded to achieve longer-term energy storage without affecting each other. Furthermore, having the rated power of the boost converter 20 equal to the battery capacity of a single battery compartment 10 ensures that the boost converter 20 can operate at its rated power while maintaining the scalability of a single energy storage unit 100, thereby achieving higher conversion efficiency.

[0058] For example, when the single-cell battery capacity of the battery compartment 10 is 6.25MWh, the rated power of the boost converter compartment 20 can also be 6.25MWh. In this embodiment, the maximum power of the boost converter compartment 20 can be 6.9MWh, but it will actually operate at a power of 6.25MWh during operation.

[0059] Alternatively, the battery capacity of a single battery compartment 10 can be set to be an integer multiple of the rated power of the boost converter compartment 20. For example, when the battery capacity of a single battery compartment is P times the rated power of the boost converter compartment, when the boost converter compartment 20 is operating at its rated power, the single battery compartment 10 can continuously re-discharge for P hours, thereby enabling the energy storage partition unit 100 to achieve a discharge of P*(M / M) hours.

[0060] It should be noted that, because battery capacity and power have different dimensions, the battery capacity of a single battery compartment 10 and the rated power of the boost converter compartment 20 should be equal, but this does not mean that the two physical quantities are the same. Furthermore, "equal values" mainly means that the two values ​​are consistent or approximately consistent; for example, there may be a certain amount of deviation between the two values. Similarly, "the battery capacity of a single battery compartment 10 and the rated power of the boost converter compartment 20 are integer multiples" means that the two values ​​are integer multiples or approximately integer multiples.

[0061] To comprehensively illustrate the composition of the energy storage system 1, the following, in conjunction with the accompanying drawings, provides a detailed description of the possible implementation methods of a single energy storage partition unit 100 in the energy storage system 1 and the various components thereof: In the energy storage partition unit 100, the battery compartment 10 provides energy storage functionality. The batteries within the battery compartment 10 can include multiple parallel battery clusters, which can be composed of multiple individual cell modules connected in series, parallel, or mixed. The battery clusters or individual cells and their modules in each battery compartment 10 can be of the same or different models, as long as the battery capacity of each battery compartment 10 is the same. The battery capacity of each battery compartment 10 can be consistent to ensure that the multiple parallel battery compartments 10 have the same specifications, thereby allowing the various battery compartments 10 in the energy storage system 1 to be interchangeable, facilitating system operation control and maintenance.

[0062] Different levels of protection can be provided for the batteries within the battery compartment 10. For example, to protect the battery compartment 10 as a whole, surge protection devices can be installed to withstand external transient overvoltages. Alternatively, to protect individual battery clusters, DC contactors or circuit breakers can be connected in series at the positive and negative output terminals of the battery clusters to actively and controllably connect or disconnect the individual battery clusters from the bus, protecting the system's operational safety. Voltage or current detection and protection devices can also be installed within the battery clusters to monitor overvoltage or overcurrent in real time and control the connection and disconnection of the battery clusters from the bus via contactors or circuit breakers, thereby protecting and isolating the corresponding battery clusters. The following examples illustrate this. Figure 4 Taking the implementation method in the example, we will introduce various detection and protection devices for the batteries in the battery compartment 10.

[0063] Specifically, such as Figure 4 As shown, the battery unit 110 within the energy storage partition unit 100 according to an embodiment of this application includes four battery clusters 101 and a battery control circuit 111. The four battery clusters 101 are connected in parallel, and their negative terminals are connected in series with a fuse 102, and then connected to the boost converter compartment 20 through a surge protection device 103. The surge protection device 103 can limit the voltage of the cable terminal connected to the battery compartment 10 to a relatively safe voltage range and disconnect the connection between the boost converter compartment 20 and the battery compartment 10 when a transient overvoltage occurs at the cable terminal. The fuse 102 can cut off the current circuit when an overcurrent occurs in the battery compartment 10 due to a circuit fault or a surge that is not suppressed by the surge protection device 103, thereby ensuring the grounding safety of the battery compartment 10.

[0064] Each battery cluster 101 in the battery compartment 10 is composed of a certain number (e.g., 8) of battery cell modules connected in series. Inside each battery cluster 101, a circuit breaker 104, a pre-charge protection circuit 105, a fuse 106, a current sensing device 107, and a disconnecting switch 108 are connected in series. Figure 3 As shown, the positive and negative terminals of the circuit in the battery compartment 10 are respectively connected to the positive and negative cable terminals of each converter in the boost converter compartment 20.

[0065] The boost converter compartment 20 is used in the energy storage partition unit 100 to provide AC / DC conversion and voltage conversion as well as grid connection control, thereby enabling the transmission and conversion of electrical energy between the batteries in the battery compartment 10 and the power grid. The following will still use... Figures 1 to 5 Taking the energy storage partition unit 100 as an example, the specific circuit configuration of the booster converter cabin 20 will be explained.

[0066] Still as Figure 3As shown, the boost converter compartment 20 according to an embodiment of this application includes four converters 201 and one transformer 202, each connected to two battery compartments 10. The four converters 201 are grouped into two groups of two. Each converter group is connected to a first surge protector 203, and the first surge protector 203 is connected in series with a resistor to suppress overvoltage generated by the first surge protector 203. The AC cable terminals of the two converter groups converge and are connected to the cable terminal of the transformer 202. A first current transformer 204 is connected in series between the transformer 202 and the converters 201. The first current transformer 204 measures the current flowing between the converters 201 and the transformer 202. This measured current value can protect the converters 201 and the transformer 202 from overcurrent damage, and also provides current data for controlling the charging and discharging of the battery compartments 10 and the operating power of the converters 201.

[0067] A second current transformer 205 is connected in series on the high-voltage side of the transformer 202, which is a three-phase double secondary winding current transformer. One winding is a protection winding, used to input the acquired current information into the protection device and cooperate with the first current transformer 204 to ensure operational safety; the other winding is a measurement winding, used to acquire current information for corresponding control. On the high-voltage side of the second current transformer 205 connected to the power grid, from the power grid to the transformer 202, a second surge protector 206 and a corresponding first live-line indicator 207, a vacuum circuit breaker 208, a disconnecting switch 209, and a grounding switch 210 and a corresponding second live-line indicator 211 are also sequentially installed. The second surge protector 206 and the first live-line indicator 207 provide overvoltage protection for the transformer 202 and indicate the live-line risk on the high-voltage side of the transformer 202. Vacuum circuit breaker 208 is used to quickly interrupt fault current in the event of a short circuit, overload, or ground fault in the system, protecting transformer 202 and other lines from damage. Disconnect switch 209 is used to physically isolate transformer 202 and other equipment from the power grid, while grounding switch 210 can forcibly ground the step-up transformer compartment 20 after power failure, releasing residual charge in the circuits within the step-up transformer compartment 20. The second live indicator device 211, similar to the first live indicator device 207, is used to provide a warning of high-voltage risks.

[0068] In this application, for ease of monitoring and operation maintenance, the centralized power distribution compartment 30 serves as the center for power collection, distribution, monitoring, and management within the energy storage partition unit 100. As previously mentioned, the centralized power distribution compartment 30 includes, but is not limited to, the battery monitoring component 31. The battery monitoring component 31 is the main control unit of the energy storage partition unit 100, and can implement charge and discharge management based on parameters such as voltage, current, and temperature of the batteries in each battery compartment 10 to ensure that the batteries in each battery compartment 10 within the energy storage partition unit 100 operate safely and efficiently.

[0069] Optionally, the battery monitoring component 31 may include a BMS main control board and an energy management system, both of which are connected to each battery compartment 10. This centralizes the BMS main control boards of each battery compartment 10, reducing the number of hardware components on the BMS main control board, thereby reducing potential points of failure and improving monitoring efficiency.

[0070] The BMS main control board is used to acquire the status of the batteries in each battery compartment 10 and protect the batteries in each battery compartment 10 to operate in a safe state. The BMS main control board can acquire the status information of the batteries in a single battery compartment 10 as a whole; or it can acquire the status information of each battery cluster 101 in the battery compartment 10 separately. The battery status information may include battery charge information, battery health information, and other information reflecting the battery status, such as battery temperature. The BMS main control board can protect the batteries based on the monitored battery status, for example, by disconnecting the contactor to isolate and protect the batteries in the event of overvoltage or short circuit. The BMS main control board can also provide the acquired information reflecting the battery status to the energy management system as the raw data upon which the energy management system relies to control charging and discharging.

[0071] The energy management system is used to control the charging and discharging of the batteries in each battery compartment 10. When controlling the charging and discharging of the batteries in each battery compartment 10, the energy management system can determine when and which batteries to charge and discharge based on external demand and internal status. External demand includes information such as external electricity demand and electricity costs; internal status includes information about each battery compartment 10 in the energy storage partition unit 100 or information about each battery cluster 101 within each battery compartment 10. Internal status information can be obtained by the energy management system directly from the battery compartment 10, or it can be obtained based on raw data from the BMS main control board.

[0072] During the operation of the energy storage system 1, the BMS main control board and energy management system ensure that the batteries in each battery compartment 10 operate in a safe state, and control the charging and discharging of the batteries in the battery compartment 10 by combining the information about the batteries in the battery compartment 10 obtained by the battery management system and external demand.

[0073] By setting up a BMS main control board and energy management system in the battery monitoring component 31, the energy storage partition unit 100 is ensured to operate safely, economically, and efficiently.

[0074] Specifically, as an optional structure, the centralized power distribution compartment 30 according to the embodiments of this application may be equipped with different monitoring cabinets such as a busbar monitoring cabinet 310, a UPS input / output monitoring power distribution cabinet 320, and a battery management system and energy management system monitoring cabinet 330.

[0075] like Figure 6 The diagram shows the structure of the combiner monitoring cabinet 310. The upper part of the combiner monitoring cabinet 310 includes components such as a DC / DC power module 311, a fiber optic switch 312, an I / O module 313, and a BMS main control board 314. The middle part of the combiner monitoring cabinet 310 may include an emergency stop button 315 for quickly shutting down the energy storage partition unit 100. The lower part of the combiner monitoring cabinet 310 may include control circuits 316 for the batteries in each battery compartment 10. The control circuits 316 can control the charging and discharging of the batteries in each battery compartment 10 and have protection functions; see [link to details]. Figure 4 The description of the internal circuitry of the battery compartment 10, as mentioned above, will not be repeated here.

[0076] like Figure 7 The diagram shows the internal circuitry of the UPS input / output monitoring power distribution cabinet 320. The circuitry of the UPS input / output monitoring power distribution cabinet 320 includes an automatic transfer switch 321. The main input port and backup input port of the automatic transfer switch 321 are respectively connected to the 220V AC power supply inside and outside the energy storage partition unit 100. Its output port is connected to the uninterruptible power supply system, i.e., the input terminal of the UPS 322, and also connected to the cabin air conditioning system to supply power to the cabin air conditioning system. The 220V AC power supply inside and outside the energy storage partition unit 100 is connected to surge protectors 323 and grounded to resist transient overvoltages. The UPS 322 is connected to a backup battery 324, which can provide backup power for at least 2 hours. The output terminal of the UPS 322 can be connected to the monitoring cabinet, local load / socket, cabin lighting system, cabin fire protection system, etc., to provide stable power to the aforementioned functional components. The UPS input / output monitoring power distribution cabinet 320 may also include components such as a transformer (not shown in the diagram).

[0077] like Figure 8The diagram shows the structure of the battery management system and energy management system monitoring cabinet 330. The monitoring cabinet 330, from top to bottom, comprises various components including an EMS 331, a BMS display and control unit 332, a local layer data network switch 333, a local layer control network switch 334, a BMS downstream fiber optic switch 335, and a video system switch 336.

[0078] In one alternative implementation, the battery compartment 10 further includes a BMS slave control board, which is electrically connected to the BMS master control board and configured to send the status information of the battery in the battery compartment 10 to the BMS master control board.

[0079] The BMS slave control board is the most basic unit in the battery management system. Compared to the BMS master control board, which manages or controls the charging and discharging of battery clusters 101 composed of several battery modules in the battery compartment 10, or manages and regulates the charging and discharging of each battery cluster 101 in the battery compartment 10 as a whole, the BMS slave control board is responsible for monitoring and managing individual battery modules within the battery cluster 101.

[0080] Specifically, the BMS control board is set in each battery compartment 10 to monitor the voltage, current and temperature of each individual cell in the battery modules of the battery cluster 101, thereby ensuring that each individual cell operates within a safe operating range. At the same time, the BMS main control board collects and sends the status information of the batteries in the battery compartment 10 to the BMS main control board, so that the BMS main control board can perform overall charging and discharging regulation based on the status information of the batteries.

[0081] By installing a BMS slave control board within the battery compartment 10, the batteries within the battery compartment 10 can be monitored in real time, allowing the BMS master control board to obtain the aforementioned status information. Based on this setup, the centralized power distribution compartment 30 can acquire the status information of the batteries distributed across each battery compartment 10 and centrally control these distributed batteries, thus improving the overall ease of control for the energy storage partition unit 100.

[0082] Optional, such as Figure 9 The booster converter compartment 20 includes: a converter compartment 21, including multiple converters 201; a transformer compartment 22, including a transformer 202; and a high-voltage compartment 23, used to provide electrical connection between the transformer 202 and the power grid.

[0083] Each of the plurality of converters 201 is electrically connected to at least one of the plurality of battery compartments 10, and the number of battery compartments 10 electrically connected to each converter 201 is the same; all of the plurality of converters 201 are connected to the transformer 202.

[0084] Within the step-up converter compartment 20, converters 201 in the transformer room are used to convert AC power from the grid into DC power suitable for the battery during charging and to convert DC power from the battery into AC power suitable for the grid during discharging. Transformer 202 in the transformer room 22 is used to collect the voltage output from multiple converters 201 and raise it to the grid connection voltage, for example, raising the AC output from converter 201 from 690V to 35kV on the bus. The circuitry and devices in the high-voltage compartment 23 provide electrical connections and protection circuitry for grid connection, and may include high-voltage switches, grid connection / disconnection controls, and short-circuit protection devices. The converter room 21, transformer room 22, and high-voltage compartment 23 can be arranged sequentially from left to right, or in other orders at different locations within the step-up converter compartment 20; this is not limited.

[0085] Each converter 201 in the converter room is connected to the same number of battery compartments 10. On the one hand, this can avoid overload or insufficient utilization when a single converter 201 is connected to too many or too few battery compartments 10. On the other hand, the fact that each converter 201 is connected to the same number of battery compartments 10 can ensure that the power consumption and heat generation of each converter 201 are uniform, which is convenient for the unified design of the entire energy storage partition unit 100.

[0086] Through the above settings, the AC / DC conversion and grid connection control functions of the boost converter compartment are realized. Based on this, both load balancing of converter 201 and centralized voltage conversion processing are achieved.

[0087] Optional, such as Figure 3 and Figure 5 The power supply terminal of the centralized power distribution compartment 30 is electrically connected to the step-up converter compartment 20 so that the step-up converter compartment 20 supplies power to at least one functional component.

[0088] After the AC voltages output from each converter 201 in the boost converter compartment 20 are combined, a portion of the energy can be branched out to power the functional components in the centralized power distribution compartment 30. Specifically, to ensure voltage compatibility with the centralized power distribution compartment 30, a transformer 301 can be further installed in the centralized power distribution compartment 30 to adjust the voltage output from the converter 201. For example, the 690V AC output from the converter 201 can be adjusted to 400V to power the various functional components.

[0089] With the above settings, the energy storage partition unit 100 can provide its own power without relying on the external power grid. At the same time, the power branched off from the self-converter 201 is more stable in terms of voltage than the power from the grid due to the stabilization function of the converter 201 itself.

[0090] Optional, such as Figure 10As shown, the functional components may also include, but are not limited to, at least one of the following: fire protection component 32, temperature control system power distribution component 33, and auxiliary power supply component 34.

[0091] The fire suppression system 32 is configured to extinguish fires in at least the battery compartment 10. The temperature control system power distribution component 33 is configured to supply power to the liquid cooling unit, which maintains the internal temperature of the battery compartment 10 within a preset operating temperature range. The auxiliary power supply component 34 is configured to provide auxiliary power to the energy storage system 1 when it is disconnected from the power grid. The preset operating temperature range of the battery compartment 10 should be between 25 degrees Celsius and 35 degrees Celsius. For example, when the battery compartment 10 generates heat due to its own operation, causing a high internal temperature, the liquid cooling unit will dissipate heat from the battery compartment 10 through liquid cooling; conversely, when the battery compartment 10 is cold due to outdoor environmental factors, the liquid cooling unit can also raise the temperature of the battery compartment 10 to a suitable operating temperature through heat exchange.

[0092] The battery monitoring component 31, fire protection component 32, temperature control system power distribution component 33, and auxiliary power supply component 34 can be arranged horizontally in sequence within the centralized power distribution compartment 30, or they can be arranged in other ways within the centralized power distribution compartment 30, without any restrictions.

[0093] Upon detection of a fire, the fire suppression system 32, located within the centralized power distribution compartment 30, can activate and control the fire extinguishing device to extinguish the fire using fire suppression media. During operation of the energy storage system, the liquid-cooled chiller regulates the temperature of the battery compartment 10, and the temperature control system power distribution component 33, which supplies power to the liquid-cooled chiller, can be located within the centralized power distribution compartment 30. Functional units within the battery compartment 10 of the energy storage system 1, such as the battery monitoring unit, require power from the power source within the battery compartment 10 during operation; various functional components within the centralized power distribution compartment 30 of the energy storage system 1 also require power. These functional units or components can rely on the external power grid for power, and when the energy storage system 1 is disconnected from the external power grid, an auxiliary power supply component 34 can be installed in the energy storage system 1 to prevent the functional units and components from interrupting operation.

[0094] By incorporating the aforementioned fire suppression components 32, temperature control system, and auxiliary power supply components 34, the spread of fire after thermal runaway within the energy storage compartment 100 can be prevented, the temperature within the battery compartment 10 can be kept stable, and the smooth operation of all functions within the energy storage compartment 100 can be ensured during grid disconnection. The fire suppression components 32, temperature control system power distribution components 33, and auxiliary power supply components 34 are all located within the centralized power distribution compartment 30, resulting in a high degree of centralization of the system's functional components, reducing equipment redundancy, improving equipment reliability, and facilitating subsequent management and maintenance.

[0095] Optionally, the functional components include a fire-fighting component 32, which includes a fire control unit and a fire-fighting medium container, the fire control unit being configured to deliver the fire-fighting medium in the fire-fighting medium container to at least one battery compartment 10.

[0096] When a battery in the battery compartment 10 experiences thermal runaway and catches fire, the fire control unit delivers the fire extinguishing medium from the fire extinguishing medium container to the battery compartment 10. The fire extinguishing medium is then released within the battery compartment 10, thereby extinguishing the fire. The fire extinguishing medium can be various types of extinguishing agents such as dry powder or carbon dioxide.

[0097] With the above settings, the fire-fighting component 32 can quickly extinguish the fire in the battery compartment 10, prevent the fire from spreading, and ensure the safety of the energy storage partition unit 100.

[0098] Optionally, the battery compartment 10 includes a fire detector and a fire hydrant (not shown in the figure). The fire detector is used to detect the fire status of the batteries inside the battery compartment 10. The fire control unit is configured to control the fire hydrant container to deliver fire hydrant to the fire hydrant corresponding to the burning battery compartment 10 when the fire detector detects a battery fire.

[0099] Each battery compartment 10 has fire-fighting pipes connected to a fire-fighting medium container, and fire detectors and fire control units are electrically connected.

[0100] The fire status within the battery compartment 10 can include whether a fire has started within the battery compartment 10 or the severity of the fire. When the fire detector detects a fire within the battery compartment 10, it sends a fire signal to the fire control unit. Upon receiving the signal, the fire control unit controls the fire-fighting medium container to deliver fire-fighting medium to the fire-fighting pipeline corresponding to the burning battery. The fire control unit can determine the amount of fire-fighting medium delivered to the fire-fighting pipeline or the duration of delivery based on the fire status. After the fire-fighting medium reaches the burning battery compartment 10 through the fire-fighting pipeline, it is released from the fire-fighting pipeline to extinguish the fire.

[0101] With the above settings, the fire in the battery compartment 10 can be accurately located and the fire can be extinguished quickly and precisely.

[0102] Optionally, the amount of fire-fighting medium stored in the fire-fighting medium container is greater than or equal to the fire-fighting demand of a single battery compartment 10, and the amount of fire-fighting medium stored in the fire-fighting medium container is less than or equal to 50% of the total fire-fighting demand of N battery compartments 10. The total fire-fighting demand refers to the amount of fire-fighting medium required to extinguish the fire when all battery compartments 10 catch fire at the same time.

[0103] The amount of fire-fighting medium in the fire-fighting medium container is not less than the fire-fighting requirement of a single battery compartment 10, thus it can adequately handle the situation where a single battery compartment 10 catches fire. Since the fire-fighting component 32 can quickly extinguish the fire when a single battery compartment 10 catches fire, effectively preventing the fire from spreading to other battery compartments 10, and the probability of multiple battery compartments 10 catching fire simultaneously is very small, the probability of simultaneously supplying fire-fighting medium to the fire-fighting pipelines corresponding to multiple battery compartments 10 is very low. In this case, the amount of fire-fighting medium stored in the fire-fighting medium container can be appropriately reduced while still meeting the fire-fighting medium requirement when all battery compartments 10 catch fire simultaneously. Specifically, the amount of fire-fighting medium stored in the fire-fighting medium container can be set to be less than or equal to half the fire-fighting medium requirement when multiple battery compartments 10 catch fire simultaneously.

[0104] With the above settings, in the event of a fire in the battery compartment 10, the amount of fire-fighting medium in the fire-fighting medium container can meet the fire-fighting requirements, enabling the fire to be extinguished quickly. At the same time, it reduces the amount of fire-fighting medium required, effectively saving costs.

[0105] Optionally, the functional components also include an auxiliary power supply component 34, which is electrically connected to each battery compartment 10 and other functional components. The auxiliary power supply component 34 is configured to provide auxiliary power to each functional component and each battery compartment 10.

[0106] like Figure 3 and Figure 5As shown, the auxiliary power supply component 34 may include a transformer 301 within the centralized power distribution compartment. One side of the transformer 301 is electrically connected to the AC side of the converter 201 in the step-up converter compartment 20 via a current transformer 302, and the other side is electrically connected to each battery compartment 10 and other functional components. This allows the power from the AC side of the converter 201 to be adjusted to AC power with a suitable voltage to power the battery compartment 10 and other functional components. For example, the 690V AC voltage of the converter 201 can be adjusted to 400V AC voltage using the transformer 301 within the centralized power distribution compartment. The auxiliary power supply component 34 may also include a UPS 322. The input terminal of the UPS 322 can be connected to a branch circuit of the output terminal of the transformer 301 within the centralized power distribution compartment. The output terminal of the UPS 322 can be connected to monitoring equipment in the energy storage partition unit 100, loads in the centralized power distribution compartment 30, lighting systems, fire protection systems, etc., to provide power to these devices and systems. The auxiliary power supply component 34 may further include an automatic transfer switch 321, which is located between the aforementioned branch circuit at the output of the transformer 301 in the centralized power distribution compartment and the input of the UPS 322. The main power input and output of the automatic transfer switch 321 are connected to the aforementioned branch circuit at the output of the transformer 301 in the centralized power distribution compartment and the input of the UPS 322, respectively. The backup power input of the automatic transfer switch 321 can be connected to an external power source 303 to switch between using electrical energy output from the converter 201 and external electrical energy. The UPS 322 may further include an internal transformer (not shown), which can further adjust the voltage at the output of the transformer 301 in the centralized power distribution compartment before inputting it to the main power input of the automatic transfer switch 321. For example, it can adjust the 400V voltage to 220V before connecting it to the main power input of the automatic transfer switch 321.

[0107] Within the auxiliary power supply component 34, a portion of the electrical energy output from the converter 201 is transformed by the transformer 301 in the centralized power distribution compartment. For example, the three-phase voltage AC690V is transformed to three-phase 400V, and a branch circuit (adjusted to single-phase voltage AC220V) enters the uninterruptible power supply system. Under normal circumstances, the 220V AC voltage, after rectification and inversion adjustment within the uninterruptible power supply system, is output to the input terminal of the uninterruptible power supply system and supplies power to the monitoring equipment in the energy storage partition unit 100, the loads in the centralized power distribution compartment 30, the lighting system, the fire protection system, and other devices through the output terminal of the uninterruptible power supply system. When an abnormality occurs in the electrical energy from the converter 201, the automatic transfer switch 321 switches the input source, connecting the external power supply from the backup power input terminal to the input terminal of the uninterruptible power supply system, and similarly supplies power to the monitoring equipment in the energy storage partition unit 100, the loads in the centralized power distribution compartment 30, the lighting system, the fire protection system, and other devices through the output terminal of the uninterruptible power supply system.

[0108] In the configuration of the aforementioned auxiliary power supply component 34, the uninterruptible power supply (UPS) system is located in the centralized power distribution compartment 30. This eliminates the need for separate UPS systems in each battery compartment 10, effectively avoiding the complex design of UPS systems and saving system costs. Furthermore, the external power supply serves as a backup power source, ensuring reliable power supply to the system.

[0109] Optionally, the functional components also include a temperature control system power distribution component 33, which includes at least one power supply circuit. The power supply end of the power supply circuit is configured to be connected to the boost converter compartment 20 or an independent power supply. The power supply circuit is used to connect to the liquid chiller unit to supply power to the liquid chiller unit.

[0110] Similar to the uninterruptible power supply system described above, the temperature control system power distribution component 33 can be connected to the output terminal of the automatic transfer switch 321. Simultaneously, the main power input terminal of the automatic transfer switch 321 can be connected to the step-up transformer compartment 20, for example, to the AC side of the converter 201 within the step-up transformer compartment 20, or via the transformer 301 within the centralized power distribution compartment to the AC side of the converter 201 within the step-up transformer compartment 20. Furthermore, the backup power input terminal of the automatic transfer switch 321 can be connected to an independent power supply, such as a station transformer.

[0111] By setting up an independent power distribution component for the temperature control system, the reliable operation of a high-power temperature control system can be ensured. Furthermore, by setting up an independent power source from the outside connected to the input terminal of the temperature control system's power supply circuit and using the power from the boost converter compartment 20 as a backup, the stable operation of the temperature control system can be ensured.

[0112] Optionally, in a single energy storage partition unit 100, multiple battery compartments 10 are located on the same side of the boost converter compartment 20 and the centralized power distribution compartment 30 in the horizontal direction; or, in a single energy storage partition, multiple battery compartments 10 are located on opposite sides of the boost converter compartment 20 and the power distribution compartment in the horizontal direction.

[0113] like Figure 11 and Figure 12 The diagram shown is a structural schematic of a single energy storage partition unit 100 of another energy storage system 1 according to an embodiment of this application, wherein, with Figure 1 Similarly, the two adjacent battery compartments 10 are distinguished by being labeled A and B respectively. Figure 11 and Figure 12 In this configuration, multiple battery compartments 10 can be arranged in other distribution configurations at different locations within the boost converter compartment 20 and the centralized power distribution compartment 30. For example, in... Figure 11 In the middle, the battery compartment 10 can be divided into two groups, respectively located above and below the boost converter compartment 20 and the centralized power distribution compartment 30; while Figure 12Since the number of battery compartments 10 is relatively small, all of the battery compartments 10 can be located on one side of the boost converter compartment 20 and the centralized power distribution compartment 30.

[0114] The battery compartments 10 can be arranged entirely on one side of the boost converter compartment 20 and the power distribution compartment, or divided into two parts and arranged on opposite sides of the boost converter compartment 20 and the power distribution compartment, depending on the size of the space of each energy storage partition unit 100 and the specific number of battery compartments 10. Therefore, the layout of the battery compartments 10 can be rationally optimized according to the convenience of actual use and maintenance, reducing the space occupied by the entire energy storage partition unit 100.

[0115] Optionally, the boost converter compartment 20 and the centralized power distribution compartment 30 are spaced apart from the battery compartment 10.

[0116] By isolating the boost converter compartment 20 and the centralized power distribution compartment 30 from the battery compartment 10, the mixing of AC and DC power can be avoided, thereby reducing electrical arcing during the operation of the energy storage partition unit 100. Furthermore, by isolating the boost converter compartment 20 and the centralized power distribution compartment 30 from the battery compartment 10, the electrical arcing phenomenon is prevented from encountering flammable gases that may be released from the battery, thus preventing the occurrence of combustion and explosion accidents.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An energy storage system, characterized in that, It includes at least one energy storage partition unit, and a single energy storage partition unit includes: A battery compartment, wherein there are N battery compartments, and each battery compartment contains a battery, wherein N is a positive integer and N > 1; The system includes M boost converter modules, with N battery modules correspondingly connected to each of the M boost converter modules. The battery capacity of each battery module is matched with the rated power of the boost converter module. Each boost converter module is configured to transmit electrical energy between the corresponding connected battery and the power grid. M is a positive integer, M≥1, and M<=N. A centralized power distribution compartment includes at least one functional component, including a battery monitoring component electrically connected to each of the battery compartments, and configured to manage the charging and discharging of the batteries in each of the battery compartments.

2. The energy storage system according to claim 1, characterized in that, N is a multiple of M, and each of the boost converter compartments is connected to N / M of the battery compartments.

3. The energy storage system according to claim 2, characterized in that, The battery capacity of a single battery compartment is equal to or an integer multiple of the rated power of the boost converter compartment.

4. The energy storage system according to claim 3, characterized in that, The battery monitoring component includes a battery management system (BMS) main control board and an energy management system. Both the BMS main control board and the energy management system are connected to each of the battery compartments and are used to control the charging and discharging of the batteries in each of the battery compartments.

5. The energy storage system according to claim 4, characterized in that, The battery compartment also includes a BMS slave control board, which is electrically connected to the BMS master control board and is configured to send the status information of the batteries in the battery compartment to the BMS master control board.

6. The energy storage system according to any one of claims 1-5, characterized in that, The booster converter chamber includes: A converter compartment includes a plurality of converters, each of the plurality of converters being electrically connected to at least one of the N battery compartments, and the number of battery compartments electrically connected to each converter being the same. A transformer room, including a transformer, wherein multiple converters are connected to the transformer; The high-voltage chamber is used to provide the electrical connection between the transformer and the power grid.

7. The energy storage system according to any one of claims 1-5, characterized in that, The power supply terminal of the centralized power distribution compartment is electrically connected to the booster converter compartment, so that the booster converter compartment supplies power to at least one of the functional components.

8. The energy storage system according to any one of claims 1-5, characterized in that, The functional components also include at least one of fire protection components, temperature control system power distribution components, and auxiliary power supply components; The fire suppression system is configured to extinguish at least the fire in the battery compartment; The temperature control system power distribution components are configured to supply power to the liquid cooling unit, which is used to maintain the internal temperature of the battery compartment within a preset operating temperature range. The auxiliary power supply component is configured to provide auxiliary power to the energy storage system when the energy storage system is disconnected from the power grid.

9. The energy storage system according to claim 8, characterized in that, The functional components include a fire protection component, which includes a fire control unit and a fire medium container. The fire control unit is configured to deliver the fire medium in the fire medium container to at least one of the battery compartments.

10. The energy storage system according to claim 9, characterized in that, The battery compartment has a fire detector and a fire pipe. The fire pipe of each battery compartment is connected to the fire-fighting medium container. The fire detector is electrically connected to the fire control unit and is used to detect the fire status of the batteries in the battery compartment. The fire control unit is configured to, when the fire detector detects a fire in the battery, control the fire-fighting medium container to deliver fire-fighting medium into the fire-fighting pipe corresponding to the burning battery compartment.

11. The energy storage system according to claim 9 or 10, characterized in that, The amount of fire-fighting medium stored in the fire-fighting medium container is greater than or equal to the fire-fighting demand of a single battery compartment, and the amount of fire-fighting medium stored in the fire-fighting medium container is less than or equal to 50% of the total fire-fighting demand of the N battery compartments.

12. The energy storage system according to claim 8, characterized in that, The functional components also include the auxiliary power supply component, and each of the battery compartments and other functional components is electrically connected to the auxiliary power supply component, which is configured to provide auxiliary power to each of the functional components and each of the battery compartments.

13. The energy storage system according to claim 8, characterized in that, The functional components also include the temperature control system power distribution component, which includes at least one power supply circuit. The power supply end of the power supply circuit is configured to be connected to the boost converter compartment or an independent power supply. The power supply circuit is used to connect to the liquid chiller unit to supply power to the liquid chiller unit.

14. The energy storage system according to any one of claims 1-5, characterized in that, In a single energy storage partition unit, multiple battery compartments are located on the same side of the boost converter compartment and the power distribution compartment in the horizontal direction; or in a single energy storage partition unit, multiple battery compartments are located on opposite sides of the boost converter compartment and the centralized power distribution compartment in the horizontal direction.

15. The energy storage system according to any one of claims 1-5, characterized in that, The boost converter compartment and the centralized power distribution compartment are both spaced apart from the battery compartment.

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