Outdoor energy storage and voltage boosting cabin system

Abstract

This invention discloses an outdoor energy storage booster tank system, belonging to the technical field of energy storage systems. The outdoor energy storage booster tank system provided by this invention is integrated into a standard shipping container, including a tank body, an energy storage converter room, a main transformer room, and a low-voltage control room. The energy storage converter room, main transformer room, and low-voltage control room are located within the tank body. A dual-zone oil containment system is constructed, with independent oil storage tanks and oil baffles to handle maintenance oil drainage and minor leaks respectively, balancing storage capacity and seepage prevention requirements. Non-contact magnetic sensing and wireless communication technology are used to achieve accurate liquid level monitoring and remote early warning, adapting to harsh environments and supporting unattended operation. The fully external maintenance design with key interfaces externally allows personnel to complete operations outside the tank, ensuring operational safety while maintaining the tank's sealing and protection level. The liquid collection and diversion structure and oil-water separation structure optimize spatial layout and discharge efficiency. The internal three-zone isolation design effectively prevents fault propagation and supports differentiated thermal management.

Description

Technical Field

[0001] This invention relates to the field of energy storage system technology, and in particular to an outdoor energy storage booster cabin system. Background Technology

[0002] As the global energy structure accelerates its transformation towards cleaner and lower-carbon energy, the deployment scale of large-scale electrochemical energy storage systems continues to expand in overseas markets. As one of the core components of energy storage power plants, integrated booster tanks have become a widely adopted solution in large-scale overseas energy storage projects due to their high integration, factory prefabrication, and convenient on-site installation. Currently, mainstream large-scale overseas energy storage booster tank systems are generally integrated into standard 20-foot to 40-foot marine hulls, internally integrating key functional modules such as the main transformer, energy storage converter (PCS), auxiliary transformer, low-voltage control room, monitoring and control unit, auxiliary power controller, battery compartment controller, and cooling system.

[0003] To meet fire safety and environmental regulations, and to address the potential risks of oil leakage or accidental oil discharge from the main transformer, the industry generally adopts two emergency oil storage tank solutions: one is to pre-embed the oil storage tank structure during the foundation construction phase, and the other is to use an external oil storage tank module. Regardless of the method used, the installation of an emergency oil storage tank is a necessary measure to ensure the long-term safe and reliable operation of the system.

[0004] However, due to the limited space within the cabin and the complex equipment layout requirements, a lack of overall optimization in the system integration solution can easily lead to multiple technical and engineering challenges. For example: unreasonable equipment layout results in low heat dissipation efficiency, affecting the lifespan of electrical components; insufficient structural strength makes it difficult to meet the requirements of ocean shipping and hoisting; lack of maintenance access design increases the difficulty of later operation and maintenance; substandard protection levels weaken environmental adaptability; high on-site construction complexity extends the project delivery cycle; more seriously, without effective isolation of accidental oil, a leak could cause soil or water pollution, posing significant environmental risks. In addition, unreasonable integration may also lead to an increase in the overall system cost. Summary of the Invention

[0005] In view of the above-mentioned problems in the background art, the present invention provides an outdoor energy storage booster chamber system.

[0006] The outdoor energy storage booster cabin system provided by this invention is integrated into a standard shipping container and includes a cabin body, an energy storage converter room, a main transformer room, and a low-voltage control room. The energy storage converter room, the main transformer room, and the low-voltage control room are located in the cabin body, and thermal and electrical isolation is achieved between the energy storage converter room, the main transformer room, and the low-voltage control room through partitions. The main transformer room houses the main transformer, and below the main transformer room is an oil storage tank for receiving and temporarily storing the insulating oil discharged by the main transformer during operation and maintenance. An oil-blocking trough is provided around the perimeter of the main transformer compartment to collect the oil leakage generated by the main transformer during transportation or operation. The oil storage tank and the oil baffle are spatially independent of each other, forming an active oil storage area and a passive leak-proof area, respectively. The oil storage tank and the oil baffle work together to form a dual-zone oil containment device integrated into the chassis frame. The oil baffle groove is provided with a liquid collection and guiding structure. The liquid collection and guiding structure extends along the liquid flow direction to the leakage oil collection groove at the end of the oil baffle groove and communicates with the leakage oil collection groove to form a continuous discharge channel. The oil storage tank is equipped with an oil-water separation device and a non-contact magnetic level sensor; the oil baffle and / or the leakage collection tank is equipped with an oil-water separation device. A monitoring and control box is provided on the outer wall of the cabin. The monitoring and control box is electrically connected to the non-contact magnetic liquid level sensor. The monitoring and control box integrates a wireless communication module, a status indicator, a display unit, and an alarm device. The monitoring and control box is used to receive the electrical signal output by the non-contact magnetic liquid level sensor and trigger a local alarm when an abnormal liquid level is detected. At the same time, it sends data containing equipment identification and alarm information to a remote management platform through the wireless communication module.

[0007] Furthermore, the main transformer is provided with an oil drain port at its bottom, an oil drain valve is installed at the oil drain port, the oil storage tank is provided with an oil drain flange interface, and the oil drain valve is connected to the oil drain flange interface through a pipeline.

[0008] Furthermore, the liquid collection and guiding structure is integrally formed with the oil baffle groove. The cross-section of the liquid collection and guiding structure is a composite shape consisting of an upper trapezoidal opening and a lower arc bottom that are smoothly connected. The liquid collection and guiding structure has a unidirectional guiding slope of 0.5% to 1% along the liquid flow direction, and is partially recessed at the position of the corresponding bottom crossbeam of the cabin to form a liquid collection trap.

[0009] Furthermore, the liquid collection trap is a smooth transition cavity formed by the downward indentation of the bottom wall of the liquid collection and guiding structure, and the depth of the smooth transition cavity is 10 mm to 30 mm.

[0010] Furthermore, the top of the liquid collection and guiding structure is covered with a dustproof net, the pore size of which is no greater than 3mm.

[0011] Furthermore, the oil storage tank is welded from stainless steel, the inner wall of the oil storage tank is coated with an anti-corrosion asphalt layer, and the volume of the oil storage tank is not less than 110% of the total oil volume of the main transformer.

[0012] Furthermore, the non-contact magnetically controlled liquid level sensor is fixed to the side wall of the oil storage tank. The non-contact magnetically controlled liquid level sensor includes a float that can rise and fall with the liquid level, a permanent magnet built into the float, and a reed switch assembly. The reed switch assembly is sealed and installed in a non-magnetic sheath, which is fixed to the side wall of the oil storage tank. The reed switch assembly includes two reed switches corresponding to the low liquid level alarm point and the high liquid level alarm point, respectively, and the two reed switches are vertically arranged at a preset height position within the non-magnetic sheath. When the float rises and falls with the liquid level, the permanent magnet triggers the corresponding reed switch through magnetic coupling, outputting an electrical signal characterizing the liquid level state.

[0013] Furthermore, the bottom of the hull is provided with an inspection hole, which is equipped with a removable sealing cover, and the position of the inspection hole is aligned vertically with the non-contact magnetic level sensor in the oil storage tank, for external observation or maintenance of the non-contact magnetic level sensor.

[0014] Furthermore, a low-pressure heat exchanger and high-pressure chamber air inlet louvers are integrated on the rear outer wall of the cabin. The low-pressure heat exchanger is thermally coupled to the electrical components inside the low-pressure control room to provide closed-loop heat dissipation for the low-pressure control room. Its operation panel, display unit and control interface are all located on the outer wall of the cabin to support direct parameter viewing and operation from outside the cabin. The high-voltage chamber air inlet louvers are a grille-type ventilation structure, which is connected to the internal air duct of the main transformer chamber. They are used to introduce external cold air to achieve natural convection heat dissipation of the main transformer. The grille blades are inclined and the inner side is equipped with a dust filter to prevent sand and debris from entering the chamber.

[0015] Furthermore, the monitoring and control box is fixed to the inside of the protective door on the outer wall of the cabin by bolts or buckles. Its display panel and operation interface pass through the protective door and face the outside of the cabin, and can still be observed and operated when the protective door is closed.

[0016] The outdoor energy storage booster tank system provided by this invention constructs a dual-zone oil containment system, using independent oil storage tanks and oil baffles to handle maintenance oil drainage and minor leaks respectively, balancing storage capacity and seepage prevention requirements. It employs non-contact magnetic sensing and wireless communication technology to achieve accurate liquid level monitoring and remote early warning, adapting to harsh environments and supporting unattended operation. The fully external maintenance design with key interfaces externally allows personnel to complete operations outside the tank, ensuring operational safety while maintaining the tank's sealing and protection level. The liquid collection and diversion structure optimizes the spatial layout and discharge efficiency. The internal three-zone isolation design effectively prevents fault propagation and supports differentiated thermal management. The overall solution significantly improves the system's oil control capabilities, operational safety, and reliability. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of an outdoor energy storage booster cabin system provided in an embodiment of the present invention; Figure 2 This is a front view of an outdoor energy storage booster cabin system provided in an embodiment of the present invention; Figure 3 This is a cross-sectional view of an outdoor energy storage booster cabin system provided in an embodiment of the present invention; Figure 4 This is a top view of an outdoor energy storage booster cabin system provided in an embodiment of the present invention; Figure 5 This is a right view of an outdoor energy storage booster cabin system provided in an embodiment of the present invention; Figure 6 For the present invention Figure 5 A magnified view of a portion of the image; Figure 7 The left view of the outdoor energy storage booster cabin system provided in an embodiment of the present invention. Detailed Implementation

[0018] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0019] like Figure 1-7 As shown, this embodiment of the invention provides an outdoor energy storage booster cabin system, integrated into a standard shipping container, including a cabin body 1, an energy storage converter room 11, a main transformer room 12, and a low-voltage control room 13. The energy storage converter room 11, the main transformer room 12, and the low-voltage control room 13 are located within the cabin body 1, and thermal and electrical isolation is achieved between the energy storage converter room 11, the main transformer room 12, and the low-voltage control room 13 through partitions. The main transformer room 12 is equipped with a main transformer 14, and an oil storage tank 3 is provided below the main transformer room 12 for receiving and temporarily storing the insulating oil discharged by the main transformer 14 during operation and maintenance. An oil-blocking trough 2 is provided around the periphery of the main transformer compartment 12 to collect the oil leakage generated by the main transformer 14 during transportation or operation; The oil storage tank 3 and the oil baffle 2 are spatially independent of each other, forming an active oil storage area and a passive leak prevention area respectively. The oil storage tank 3 and the oil baffle 2 work together to form a dual-zone oil containment device integrated in the bottom frame of the cabin 1. The oil-blocking groove 2 is provided with a liquid collection and guiding structure 21. The liquid collection and guiding structure 21 extends along the liquid flow direction to the leakage oil collection groove 22 located at the end of the oil-blocking groove 2 and communicates with the leakage oil collection groove 22 to form a continuous discharge channel. The oil storage tank 3 is equipped with an oil-water separation device 31 and a non-contact magnetic level sensor 32; the oil baffle 2 and / or the leakage collection tank 22 are equipped with an oil-water separation device 31. A monitoring and control box 4 is provided on the outer wall of the cabin 1. The monitoring and control box 4 is electrically connected to the non-contact magnetic liquid level sensor 32. The monitoring and control box 4 integrates a wireless communication module, a status indicator, a display unit, and an alarm device. The monitoring and control box 4 is used to receive the electrical signal output by the non-contact magnetic liquid level sensor 32 and trigger a local alarm when an abnormal liquid level is detected. At the same time, it sends data containing equipment identification and alarm information to the remote management platform through the wireless communication module.

[0020] In this embodiment of the invention, the main transformer 14 is provided with an oil drain port at its bottom, an oil drain valve is installed at the oil drain port, the oil storage tank 3 is provided with an oil drain flange interface 33, and the oil drain valve is connected to the oil drain flange interface 33 through a pipeline.

[0021] In this embodiment of the invention, the liquid collection and guiding structure 21 is integrally formed with the oil baffle groove 2. The cross-section of the liquid collection and guiding structure 21 is a composite shape consisting of an upper trapezoidal opening and a lower arc bottom that are smoothly connected. The liquid collection and guiding structure 21 has a unidirectional guiding slope of 0.5% to 1% along the liquid flow direction, and is partially recessed at the position of the bottom crossbeam of the corresponding compartment 1 to form a liquid collection trap.

[0022] In this embodiment of the invention, the liquid collection trap is a smooth transition cavity 5 formed by the downward indentation of the bottom wall of the liquid collection and guiding structure 21, and the depth of the smooth transition cavity 5 is 10mm to 30mm.

[0023] In this embodiment of the invention, the top of the liquid collection and guiding structure 21 is covered with a dustproof net, and the pore size of the dustproof net is no greater than 3mm.

[0024] In this embodiment of the invention, the oil storage tank 3 is welded from stainless steel, the inner wall of the oil storage tank 3 is coated with an anti-corrosion asphalt layer, and the volume of the oil storage tank 3 is not less than 110% of the total oil volume of the main transformer 14.

[0025] In this embodiment of the invention, the non-contact magnetically controlled liquid level sensor 32 is fixed to the side wall of the oil storage tank 3. The non-contact magnetically controlled liquid level sensor 32 includes a float that can rise and fall with the liquid level, a permanent magnet built into the float, and a reed switch assembly. The reed switch assembly is sealed and installed in a non-magnetic sheath, which is fixed to the side wall of the oil storage tank 3. The reed switch assembly includes two reed switches corresponding to the low liquid level alarm point and the high liquid level alarm point, respectively, and the two reed switches are vertically arranged at a preset height position in the non-magnetic sheath. When the float rises and falls with the liquid level, the permanent magnet triggers the corresponding reed switch through magnetic coupling, outputting an electrical signal characterizing the liquid level state.

[0026] In this embodiment of the invention, the bottom of the cabin 1 is provided with an inspection hole 15, the inspection hole 15 is equipped with a removable sealing cover, and the position of the inspection hole 15 is aligned vertically with the non-contact magnetic level sensor 32 in the oil storage tank 3, for external observation or maintenance of the non-contact magnetic level sensor 32.

[0027] In this embodiment of the invention, a low-pressure heat exchanger 16 and a high-pressure chamber air inlet louver 17 are integrated on the rear outer wall of the cabin 1. The low-pressure heat exchanger 16 is thermally coupled to the electrical components in the low-pressure control chamber 13 for closed-loop heat dissipation of the low-pressure control chamber 13. Its operation panel, display unit and control interface are all located on the outer wall of the chamber 1 to support direct parameter viewing and operation outside the chamber 1. The high-voltage chamber air inlet louver 17 is a grille-type ventilation structure, which is connected to the internal air duct of the main transformer chamber 12. It is used to introduce external cold air to achieve natural convection heat dissipation of the main transformer 14. Its grille blades are inclined and the inner side is provided with a dust filter to prevent sand and debris from entering the interior of the chamber 1.

[0028] In this embodiment of the invention, the monitoring and control box 4 is fixed to the inside of the protective door on the outer wall of the cabin 1 by bolts or buckles. Its display panel and operation interface pass through the protective door and face the outside of the cabin 1, and can still be observed and operated when the protective door is closed.

[0029] This invention provides an outdoor energy storage booster system integrated into a standard 20-foot or 40-foot shipping container. Its compact structure requires no additional civil engineering support, making it suitable for harsh operating environments lacking fixed structural support, such as photovoltaic power plants, wind farms, islands, and remote areas. Through the synergistic effect of five core design features—physical isolation, dual-zone oil containment, intelligent monitoring, full external maintenance, and environmental enhancement—this system overcomes the technical bottlenecks of traditional outdoor booster tanks, including high oil leakage risk, difficult maintenance, and poor environmental adaptability.

[0030] This system adopts a highly integrated design of "external oil baffle 2 + bottom oil storage tank 3 + intelligent monitoring", which is compatible with various models of energy storage converters 18 and can adapt to the capacity requirements of transformers from 1.75MW to 10MW. It can ensure the stable and reliable operation of each subsystem. Its core components include energy storage converter 18, main transformer 14, high voltage RMU, low voltage control room 13, low voltage heat exchanger 16, oil-water separation device 31, non-contact magnetic liquid level sensor 32, oil drain flange interface 33, leakage oil collection tank 22, copper busbar 10, monitoring and control box 4, liquid collection and guiding structure 21, transformer substation monitoring and control device, auxiliary transformer, and low voltage sampler 19. It can operate stably in harsh outdoor environments without fixed building support, reducing on-site installation and civil engineering costs.

[0031] This system is integrated into a standard shipping container, the size of which can be selected according to requirements. The interior of compartment 1 is divided into three independent functional areas by metal partitions: the energy storage converter room 11, the main transformer room 12, and the low-voltage control room 13. These functional rooms are thermally and electrically isolated by partitions filled with fire-resistant and heat-insulating materials, preventing fault propagation and thermal interference, meeting the safety requirements of GB / T 17467 "High Voltage / Low Voltage Prefabricated Substations" and the IEC 62271 series of standards, ensuring stable system operation. Specifically, the energy storage converter room 11 houses the energy storage converter 18, DC battery cluster interfaces, and high-voltage switchgear, responsible for power transmission and conversion, adaptable to scenarios with different power requirements; the main transformer room 12 installs an oil-immersed main transformer 14 with a rated capacity ranging from 630kVA to 2500 kVA, the core component for system power output; and the low-voltage control room 13 is equipped with a PLC controller, relay protection devices, communication units, and other low-voltage electrical components, responsible for system control, signal aggregation and transmission, ensuring coordinated operation of all components.

[0032] The core design of this system lies in the rational division of the high and low pressure compartments, the energy storage converter compartment 11, and the main transformer compartment 12. This ensures normal heat dissipation for each subsystem and stable operation of various signal acquisition systems. The "dual-zone oil storage tank 3 structure" achieves functional separation and coordination between "passive leakage prevention," "oil storage capacity monitoring," and "active oil storage." Furthermore, the entire system employs an external maintenance approach, allowing operators to monitor the equipment operation status and transformer oil level safety in compartment 1 remotely in real time without entering the interior. Its core operating logic is as follows: metal partitions and fireproof insulation design enable independent operation of each functional area; a dual-zone oil containment device addresses both maintenance oil drainage and daily leakage scenarios for the main transformer 14; intelligent monitoring and remote control enable unattended operation and rapid fault response; and the external maintenance design mitigates operational risks within the compartment, ensuring long-term stable system operation. This application solves the core technical bottleneck of existing outdoor booster chambers by physically isolating the energy storage converter chamber 11, the main transformer chamber 12 and the low-voltage control chamber 13, integrating a dual-zone oil containment device in the chassis of the chamber 1, and combining intelligent monitoring and full external maintenance design.

[0033] To address two typical scenarios—oil drainage during maintenance and daily leakage—this system integrates a dual-zone oil containment device within the chassis of the main transformer 1. This device consists of an external oil baffle trough 2 and a bottom oil storage tank 3. These two components have different functions and operate independently, yet are integrated within the chassis of the main transformer 1. This integration saves space and provides a complete solution for both passive leakage prevention and active oil storage. The bottom oil storage tank 3, located directly below the main transformer 14, receives the insulating oil discharged during maintenance, providing active oil storage. It is constructed from high-quality stainless steel (such as 304 stainless steel), possessing excellent structural strength, corrosion resistance, and long-term sealing performance. It can withstand long-term immersion in the insulating oil of the main transformer 14 and adapt to harsh outdoor environments such as high humidity, salt spray, and temperature fluctuations. The inner wall is coated with an anti-corrosion asphalt layer, enhancing chemical protection against trace amounts of moisture, acidic components, and external condensation in the oil, slowing down the corrosion process of the metal substrate, and preventing leakage hazards caused by rust. The oil storage tank 3 is designed with a volume not less than 110% of the total oil volume of the main transformer 14, which can completely accommodate all the insulating oil discharged from the main transformer 14 during maintenance or fault conditions. At the same time, a safety margin is reserved to cope with the volume expansion caused by oil temperature changes, instantaneous fluctuations during operation and maintenance, and a small amount of rainwater or condensate mixed in, to prevent the risk of overflow. An oil-water separation device 31 is installed inside, which can automatically separate rainwater from insulating oil to maintain the purity of the oil. At the same time, a non-contact magnetic liquid level sensor 32 is configured to monitor the oil level in real time. If the oil-water separation device 31 cannot discharge in time due to severe weather such as heavy rain, multiple oil-water separation devices 31 can be activated as needed.

[0034] An external oil baffle 2 surrounds the main transformer compartment 12 to collect trace amounts of leaked oil generated during transportation or operation, preventing oil from polluting the environment or damaging equipment, and achieving oil-water separation between external rainwater and leaked oil. The oil baffle 2 and the liquid collection and guiding structure 21 are integrally formed without splicing gaps, preventing leaked oil from overflowing from the joints and improving the sealing integrity and structural reliability of the system. The liquid collection and guiding structure 21 adopts a composite cross-section with a trapezoidal opening at the top and a smooth connection at the bottom arc. The trapezoidal opening can increase the liquid collection area and reduce the risk of blockage by sand and debris; the arc bottom design with no dead corners reduces liquid residue and ensures that the oil can be completely discharged; with a unidirectional guiding slope of 0.5%~1%, the oil can achieve autonomous directional flow under the action of gravity, and continuous drainage can be completed without external power. The top of the liquid collection and diversion structure 21 is covered with a stainless steel dustproof mesh with a pore size limited to no more than 3mm. This mesh can block common external environmental debris such as sand, leaves, insects, and other solid objects from entering the diversion channel. The pore size has been optimized by engineering to intercept larger particulate pollutants that are prone to clogging, while not hindering the smooth flow of oil or rainwater, ensuring the long-term stable operation of the diversion function. At the same time, it prevents debris from accumulating at the bottom of the diversion channel, preventing risks such as reduced drainage cross-section, liquid retention, and localized corrosion. This improves the system's self-cleaning ability and maintenance cycle, making it suitable for outdoor application scenarios with frequent sandstorms, dense vegetation, or a lot of industrial dust. The end of the diversion channel is connected to the seepage oil collection tank 22, which is also equipped with an oil-water separation device 31 to achieve rainwater discharge and oil retention, forming a complete drainage system.

[0035] At the location of the bottom crossbeam corresponding to the hull 1, the liquid collection and guiding structure 21 is partially recessed to form a liquid collection trap. This trap is a smooth transition cavity 5 with the bottom wall recessed downwards, and the depth is limited to the range of 10mm to 30mm. This depth range has been verified through engineering practice. If the depth is less than 10mm, the buffering capacity is insufficient and it is difficult to accommodate the instantaneous surge of oil caused by transportation vibration or sudden leakage; if the depth exceeds 30mm, it is easy to cause oil stagnation, increase the risk of residue, and may interfere with the normal guiding efficiency. The smooth-transition concave structure avoids sharp corners or abrupt changes in cross-section, preventing the deposition of dirt and the formation of liquid eddies, ensuring that the oil can still pass smoothly under normal flow conditions; only when the flow rate increases suddenly, the concave structure plays a temporary buffering role, realizing the functional synergy of "guiding the flow in normal times and storing the flow in emergencies", without occupying additional space in the compartment 1, nor damaging the overall drainage slope of the liquid collection and guiding structure 21, improving the adaptability of the guiding system to dynamic working conditions (such as hoisting, transportation bumps, thermal expansion and contraction caused by temperature changes), and preventing a small amount of leaked oil from overflowing the oil baffle groove 2 due to instantaneous impact.

[0036] The main transformer 14 is equipped with an oil drain port at its bottom and a manual or electric oil drain valve (which can be operated remotely or manually). A standardized oil drain flange interface 33 is also installed on the oil storage tank 3, allowing the oil drain valve to be reliably connected to the oil drain flange interface 33 via an oil-resistant hose or steel pipe. This enables the closed, directional, and controlled discharge of the insulating oil from the main transformer 14. This design avoids the oil splashing, leakage, and environmental pollution problems that easily occur during traditional open oil draining processes, improving the safety and environmental compliance of operation and maintenance. The oil drain flange interface 33 adopts a standard size design, facilitating quick connection and disassembly of pipelines. The entire oil draining process can be completed without personnel entering the compartment 1, reducing the risk of contact with high-voltage equipment and implementing the "fully external maintenance" design concept. Furthermore, this closed pipeline system maintains good sealing performance in non-maintenance states, preventing external moisture, dust, and other contaminants from entering the oil storage tank 3, ensuring the cleanliness and dielectric properties of the insulating oil, and providing a guarantee for the long-term stable operation of the main transformer 14.

[0037] This system adopts a dual monitoring mode of "local monitoring + remote control" to ensure real-time controllability of oil management and equipment operation. The non-contact magnetic level sensor 32 is embedded in the floor inspection hole 15 and serves as the core component of the "liquid collection and detection module." It is fixed to the side wall of the oil storage tank 3. The core structure includes a float that rises and falls with the liquid level, a permanent magnet built into the float, and a reed switch assembly sealed within a non-magnetic sheath (such as a 304 stainless steel tube). This design achieves complete physical isolation between the sensing circuit and the measured medium. The float and permanent magnet are in direct contact with the oil, while sensitive electronic components such as the reed switch are sealed inside the non-magnetic sheath, preventing contact with insulating oil, condensation, or corrosive gases. This avoids problems such as malfunctions, performance drift, or lifespan degradation caused by oil contamination, moisture intrusion, or chemical corrosion in traditional immersion electrodes or electronic sensors, improving the long-term reliability and environmental adaptability of level monitoring under harsh conditions. The reed switch assembly comprises two independent reed switches, corresponding to the low liquid level alarm point (e.g., 100mm from the bottom of the tank) and the high liquid level alarm point (e.g., 200mm from the top of the tank), respectively, and are precisely fixed vertically at a preset height within a non-magnetic sheath. When the float rises and falls with the oil level, the built-in permanent magnet triggers the corresponding reed switch to close non-contactly through magnetic coupling, outputting a clear and stable switching electrical signal to achieve a dual-threshold graded alarm function. This provides early warning when the oil level is too low (ensuring safe oil draining operations) and timely alarm when the oil level is too high (preventing overflow risks). Furthermore, the sensor has a compact structure and is easy to install; the reed switches are passive devices, requiring no external power supply for status sensing, exhibiting low power consumption and fast response. Combined with the monitoring and control unit, it can simultaneously achieve local audible and visual alarms and remote wireless alarm linkage, supporting unattended operation and maintenance.

[0038] The monitoring and control box 4 uses a stainless steel sheet metal shell and is fixed to the inside of the outer wall protective door of the compartment 1 by bolts or clips. Its display panel and operation interface pass through the protective door and face the outside of the compartment 1, realizing real-time observation and complete operation of the system status when the protective door is completely closed. It integrates a signal host, wireless communication module (supporting 4G / NB-IoT / LoRa), LED status indicator, LCD display unit, buzzer and battery pack, etc. It can receive liquid level sensor signals in real time to realize system monitoring of the capacity of oil storage tank 3. When an abnormal oil level (too high or too low) is detected, an audible and visual alarm is triggered simultaneously, and a data packet containing container number, alarm time, alarm type, device ID and timestamp is uploaded to the remote management platform, supporting early fault identification and rapid response, and improving the reliability of system operation. The monitoring and control box 4 is installed inside the protective door, which is physically protected by the overall structure of the cabin 1 to avoid external impact or human damage. The through-panel design ensures that the human-machine interface is fully exposed, taking into account both equipment safety and ease of operation. The bolt or clip fixing method facilitates later inspection, upgrade or replacement, improving maintenance efficiency. It can still operate normally when the protective door is closed, ensuring that the overall sealing performance of the cabin 1 is not compromised and continuously maintaining an IP54 or higher protection level and C5-M level corrosion resistance.

[0039] The low-voltage control room 13 integrates auxiliary transformers, auxiliary power controllers, battery compartment controllers, high-voltage circuit breakers, high-voltage controllers, high-voltage voltage samplers, high-voltage current samplers, and low-voltage samplers 19. It can collect various signals such as liquid level monitoring, current, and voltage, and upload them to the management platform via the cloud or send working signals via mobile phone. The low-voltage sampler 19 is installed inside the main power copper busbar conduit 10 to collect AC current data from the system and input it into the low-voltage control room 13. Different paths and protective measures are used between the various components. High-voltage cables, low-voltage cables, signal cables, and fire protection cables are all individually isolated using high-temperature flame-retardant cable trays and conduits, achieving physical isolation, independence, and non-interference. This ensures accurate and interference-free signal transmission, providing support for system operation status analysis and fault diagnosis. The low-voltage operating system is integrated on the panel of the low-voltage control room 13, allowing operators to operate without entering the cabin 1. It also enables cloud and local back-end operation recording, ensuring the personal safety of operators. The low-voltage cabinet has a built-in auxiliary transformer and UPS uninterruptible power supply system to ensure the stable and safe operation of all components in the low-voltage control room 13.

[0040] This system integrates a low-pressure heat exchanger 16 and a high-pressure chamber air inlet louver 17 on the rear outer wall of the cabin 1, respectively matching the heat dissipation requirements of the low-pressure control chamber 13 and the main transformer chamber 12. This creates a thermal management scheme that is independent in each zone, highly efficient, reliable, and environmentally adaptable, ensuring stable temperatures in each functional area and avoiding thermal interference. The energy storage converter compartment 11 relies on the converter body's heat dissipation system to exhaust heat from the top to the bottom of the compartment 1, preventing heat accumulation. The main transformer compartment 12 uses natural convection cooling. The rear of the compartment 1 has high-voltage chamber air inlet louvers 17, a grille-type ventilation structure with the grille blades set at an angle of 15°–30° and a dust filter installed on the inside. This ensures good ventilation efficiency while preventing rainwater backflow, sand, dust, and other debris from entering the compartment 1, balancing heat dissipation performance and sealing protection. Cool air enters the internal air duct of the main transformer compartment 12 through the louvers, flows over the surface of the main transformer 14, and is exhausted from the top exhaust port, forming stable natural convection without the need for additional fans or electrical energy consumption. The low-voltage control compartment 13 uses closed-loop cooling. The low-pressure heat exchanger 16 is integrated into the outer wall of the rear end of the body 1. Its inner side is thermally coupled with the electrical components in the low-pressure control chamber 13 to form a closed internal circulation heat dissipation system. The air inside the chamber circulates in a sealed environment, and the heat is conducted to the outside through the heat exchanger. There is no exchange of air between the inside and outside throughout the process. This design prevents the intrusion of external dust, moisture and corrosive gases, so that the low-pressure control chamber 13 can maintain a stable IP54 or higher protection level and C5-M level corrosion resistance for a long time, improving the operational reliability and life of the control system. At the same time, the operation panel, display unit and control interface of the heat exchanger are all arranged on the outer wall of the body 1, allowing maintenance personnel to directly view parameters, monitor status and operate functions outside the chamber, which is in line with the "all-outdoor maintenance" concept and ensures personal safety. Each compartment is completely isolated by thermal insulation partitions to ensure that the heat dissipation air ducts do not interfere with each other, balancing heat dissipation efficiency and equipment safety. The heat dissipation system adopts a dual-mode collaborative architecture of "closed heat exchange + natural convection air intake" to achieve a balance of high protection, low power consumption, maintenance-free operation and ease of operation while ensuring that the thermal management of each functional compartment is independent and does not interfere with each other. This improves the operational stability and engineering applicability of the outdoor energy storage booster cabin in harsh environments such as high temperature, high humidity and sandstorms.

[0041] All maintenance operations of this system can be completed outside the cabin 1, avoiding the risks of high-voltage, high-temperature, and confined space operations, and complying with power safety regulations. The monitoring and control box 4, the low-voltage control room 13 operating panel, the oil drain flange interface 33, and the inspection hole 15 are all located on the outside or bottom exposed area of ​​the cabin 1. Maintenance personnel can complete routine operations such as parameter viewing, alarm reset, oil draining, and sensor calibration without entering the cabin. By providing an inspection port 15 at the bottom of the compartment 1, which is precisely aligned vertically with the non-contact magnetically controlled liquid level sensor 32 inside the oil storage tank 3, and equipped with a removable sealing cover (such as a bolt-tightened sealing cover with a sealing ring), external visual observation and convenient maintenance of the sensor are achieved. Maintenance personnel can quickly remove the sealing cover from outside the compartment 1 to directly visually determine the liquid level by observing the float position, and perform cleaning, calibration, or replacement operations without opening the main door of the compartment 1 or entering the high-voltage equipment area. In non-maintenance mode, the inspection port 15 maintains the protection level and corrosion resistance of the bottom of the compartment 1, preventing rainwater, dust, and corrosive gases from entering the oil storage tank 3 area, ensuring the cleanliness of the insulating oil and the long-term stable operation of the sensor. All maintenance interfaces adopt a standardized design, facilitating quick disassembly, debugging, and replacement, improving maintenance efficiency and reducing maintenance costs.

[0042] This system, through structural integration, geometric optimization, and intelligent upgrades, incorporates seven core technological innovations to solve many problems associated with traditional outdoor pressurization chambers. The overall system adopts an integrated design of "external oil baffle 2 + bottom oil storage tank 3 + intelligent monitoring," offering comprehensive functions, a rational distribution of systems, and independent cooling systems to adapt to various scenarios. The entire system is integrated within a standard shipping container, resulting in a compact structure that eliminates the need for additional civil engineering and reduces on-site installation costs. The structural innovation lies in the double-layered oil storage tank 3 structure, which combines the external oil baffle 2 with the bottom oil storage tank 3 to achieve a dual function of "passive leak prevention + active oil storage." The two layers operate independently yet collaboratively, addressing both the storage needs for maintenance oil drainage and the interception of daily oil leaks, preventing environmental pollution and equipment damage, and constructing a collaborative active and passive oil protection system. Geometric innovation is embodied in the composite liquid collection and guiding structure 21. The liquid collection and guiding structure 21 adopts a composite cross-section of "trapezoidal opening + arc bottom" and a unidirectional guiding slope of 0.5%~1% to achieve gravity flow of oil without external power. Locally set concave liquid collection traps (depth 10~30mm) buffer the oil fluctuations caused by transportation shaking or sudden leakage, and prevent oil overflow. The one-piece molding without splicing gaps eliminates secondary leakage. It integrates anti-clogging, low residue, gravity flow guidance and anti-disturbance buffering functions, and solves the technical defects of traditional guiding channels such as easy clogging, incomplete drainage and difficulty in dealing with flow fluctuations.

[0043] By adopting a combined structure of "float + permanent magnet + reed switch," complete physical isolation between the sensing circuit and the oil is achieved, avoiding monitoring failures caused by oil contamination and moisture. The dual-threshold alarm design can accurately warn of abnormal oil levels and supports local and remote linkage alarms, improving system operational reliability and solving the technical challenges of easy failure and high failure rate of liquid level monitoring in harsh environments such as high temperature, high humidity, and oil contamination in outdoor energy storage booster chambers. Operation and maintenance innovation is reflected in the all-external maintenance design. All key operation interfaces are located outside the chamber, combined with remote wireless monitoring, realizing a dual operation and maintenance mode of "local operation + remote control." All routine operations can be completed without entering the chamber, improving operation and maintenance safety and convenience, and complying with power safety regulations. Regarding electrical safety optimization, each secondary circuit and auxiliary power supply is physically isolated, independent, and does not interfere with each other; the safety distances of various internal electrical components all exceed national standards to ensure electrical safety; high-voltage, low-voltage cables, and signal cables are laid separately to avoid interference. Strong environmental adaptability is reflected in the overall design of the cabin, which can meet the ambient temperature range of -40℃ to 50℃, withstand harsh environments such as sandstorms, blizzards, and high salt spray, and has a protection level of IP54 (IP55 optional) and a corrosion resistance level of C5-M (suitable for marine high salt spray environments). The configuration can be adjusted according to different usage environments to adapt to various complex outdoor scenarios.

[0044] The entire cabin 1 meets multiple core technical specifications, can operate stably for extended periods in harsh outdoor environments, has an IP54 protection rating (IP55 optional), a C5-M corrosion resistance rating (suitable for high-salt-spray marine environments), and a wide operating temperature range. With a design range of 40℃ to +50℃ and a seismic fortification intensity of 8 degrees, this system is compatible with sea transport according to ISO 1496 standards and can be directly hoisted and transported without additional reinforcement. Based on the above design, this system has strong adaptability and can be flexibly adjusted according to different project requirements. The energy storage inverter, main transformer 14, and low-voltage control room 13 can be replaced in terms of brand and capacity. The low-voltage control room 13 and monitoring control box 4 can also be replaced in terms of brand and capacity and can be adapted and replaced with cloud control logic. The integrated solution of the booster chamber system can add or remove secondary circuits and fire protection system configurations. The low-voltage control room 13 is highly integrated and can integrate various control components and control systems. It is also an independent cabinet, which is convenient for maintenance and configuration changes. The volume and overall dimensions of the oil storage tank 3 system (external oil baffle 2 and bottom oil storage tank 3) can be adjusted according to requirements to adapt to equipment of different brands and capacities. The monitoring control box 4, through various internally integrated components, works with the non-contact magnetic liquid level sensor 32 in the oil storage tank 3 to realize system monitoring of the capacity of the oil storage tank 3 and liquid level alarm.

[0045] In summary, this invention solves the technical bottlenecks of existing outdoor pressurization chambers in terms of oil management, safety protection, ease of operation and maintenance, and environmental adaptability through structural integration, functional synergy, and intelligent design.

[0046] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many modifications under the guidance of the present invention without departing from the spirit and scope of the claims. All of these modifications are within the protection scope of the present invention.

Claims

1. An outdoor energy storage booster cabin system, integrated within a standard shipping container, comprising a cabin body (1), an energy storage converter room (11), a main transformer room (12), and a low-voltage control room (13), characterized in that, The energy storage converter room (11), the main transformer room (12) and the low-voltage control room (13) are located inside the cabin (1). Thermal and electrical isolation are achieved between the energy storage converter room (11), the main transformer room (12) and the low-voltage control room (13) through partitions. The main transformer room (12) is equipped with a main transformer (14), and an oil storage tank (3) is provided below the main transformer room (12) for receiving and temporarily storing the insulating oil discharged by the main transformer (14) during operation and maintenance. An oil-blocking trough (2) is provided around the perimeter of the main transformer room (12) to collect the oil leakage generated by the main transformer (14) during transportation or operation. The oil storage tank (3) and the oil baffle (2) are spatially independent of each other, forming an active oil storage area and a passive leak prevention area respectively. The oil storage tank (3) and the oil baffle (2) work together to form a dual-zone oil containment device integrated in the chassis of the cabin (1). The oil-blocking groove (2) is provided with a liquid collection and guiding structure (21). The liquid collection and guiding structure (21) extends along the liquid flow direction to the leakage oil collection groove (22) located at the end of the oil-blocking groove (2) and communicates with the leakage oil collection groove (22) to form a continuous discharge channel. The oil storage tank (3) is equipped with an oil-water separation device (31) and a non-contact magnetic level sensor (32); the oil baffle (2) and / or the leakage collection tank (22) are equipped with an oil-water separation device (31). A monitoring and control box (4) is provided on the outer wall of the cabin (1). The monitoring and control box (4) is electrically connected to the non-contact magnetic liquid level sensor (32). The monitoring and control box (4) integrates a wireless communication module, a status indicator, a display unit, and an alarm device. The monitoring and control box (4) is used to receive the electrical signal output by the non-contact magnetic liquid level sensor (32) and trigger a local alarm when an abnormal liquid level is detected. At the same time, it sends data containing equipment identification and alarm information to the remote management platform through the wireless communication module.

2. The outdoor energy storage booster chamber system according to claim 1, characterized in that, The main transformer (14) is provided with an oil drain port at the bottom, and an oil drain valve is installed at the oil drain port. The oil storage tank (3) is provided with an oil drain flange interface (33), and the oil drain valve is connected to the oil drain flange interface (33) through a pipeline.

3. The outdoor energy storage booster chamber system according to claim 1, characterized in that, The liquid collection and guiding structure (21) is integrally formed with the oil baffle groove (2). The cross-section of the liquid collection and guiding structure (21) is a composite shape consisting of an upper trapezoidal opening and a lower arc bottom that are smoothly connected. The liquid collection and guiding structure (21) has a unidirectional guiding slope of 0.5% to 1% along the liquid flow direction and is partially recessed at the position of the bottom crossbeam of the corresponding compartment (1) to form a liquid collection trap.

4. The outdoor energy storage booster chamber system according to claim 3, characterized in that, The liquid collection trap is a smooth transition cavity (5) formed by the downward indentation of the bottom wall of the liquid collection and guiding structure (21), and the depth of the smooth transition cavity (5) is 10 mm to 30 mm.

5. The outdoor energy storage booster chamber system according to claim 3, characterized in that, The top of the liquid collection and guiding structure (21) is covered with a dustproof net, the pore size of which is no greater than 3 mm.

6. The outdoor energy storage booster chamber system according to claim 2, characterized in that, The oil storage tank (3) is welded from stainless steel. The inner wall of the oil storage tank (3) is coated with an anti-corrosion asphalt layer, and the volume of the oil storage tank (3) is not less than 110% of the total oil volume of the main transformer (14).

7. The outdoor energy storage booster chamber system according to claim 1, characterized in that, The non-contact magnetically controlled liquid level sensor (32) is fixed to the side wall of the oil storage tank (3). The non-contact magnetically controlled liquid level sensor (32) includes a float that can rise and fall with the liquid level, a permanent magnet built into the float, and a reed switch assembly. The reed switch assembly is sealed and installed in a non-magnetic sheath, which is fixed to the side wall of the oil storage tank (3). The reed switch assembly includes two reed switches corresponding to the low liquid level alarm point and the high liquid level alarm point, respectively, and the two reed switches are set at a preset height position in the non-magnetic sheath in the vertical direction. When the float rises and falls with the liquid level, the permanent magnet triggers the corresponding reed switch through magnetic coupling and outputs an electrical signal characterizing the liquid level state.

8. The outdoor energy storage booster chamber system according to claim 7, characterized in that, The bottom of the cabin (1) is provided with an inspection hole (15), which is equipped with a removable sealing cover. The position of the inspection hole (15) is aligned vertically with the non-contact magnetic level sensor (32) in the oil storage tank (3) for external observation or maintenance of the non-contact magnetic level sensor (32).

9. The outdoor energy storage booster chamber system according to claim 1, characterized in that, The rear outer wall of the cabin (1) is equipped with a low-pressure heat exchanger (16) and a high-pressure chamber air inlet louver (17). The low-pressure heat exchanger (16) is thermally coupled to the electrical components in the low-pressure control chamber (13) for closed-loop heat dissipation of the low-pressure control chamber (13). Its operation panel, display unit and control interface are all located on the outer wall of the cabin (1) to support direct parameter viewing and operation outside the cabin (1). The high-voltage chamber air inlet louver (17) is a grille-type ventilation structure, which is connected to the internal air duct of the main transformer chamber (12) to introduce external cold air to achieve natural convection heat dissipation of the main transformer (14). Its grille blades are inclined and the inner side is provided with a dust filter to prevent sand and debris from entering the interior of the chamber (1).

10. The outdoor energy storage booster chamber system according to claim 1, characterized in that, The monitoring and control box (4) is fixed to the inside of the protective door on the outer wall of the cabin (1) by bolts or buckles. Its display panel and operation interface pass through the protective door and face the outside of the cabin (1). It can still be observed and operated when the protective door is closed.

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