Submerged high pressure cascade energy storage system battery compartment

Abstract

The utility model discloses a kind of submerged high-pressure cascading energy storage system battery cabin, including battery rack, liquid cooling host, liquid cooling circulation pipeline and water-water exchanger, a plurality of battery PACK is installed on battery rack, the inside of battery PACK is provided with cooling oil and the electric core immersed in cooling oil, the bottom of the electric core is fixed with liquid cooling plate, liquid cooling circulation pipeline is in turn connected liquid cooling plate, the first passage of water-water exchanger and liquid cooling host form closed circulation loop, the second passage of water-water exchanger is communicated with external circulating water, for the heat exchange of cooling liquid in the first passage of water-water exchanger. By the electric core in battery PACK is immersed in cooling oil, the electric core bottom is provided with liquid cooling plate and water-water exchanger is connected into main liquid cooling loop three combinations, a multi-level heat dissipation system is constructed, the energy consumption of liquid cooling host is greatly reduced, the unity of high efficiency and energy saving is realized.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology for high-voltage electrical equipment, and specifically to a battery compartment for an immersion high-voltage cascaded energy storage system. Background Technology

[0002] High-voltage cascaded energy storage systems have become an important choice for large-scale energy storage due to their advantages such as not requiring additional step-up transformers and high efficiency. However, these systems also face a series of thermal management challenges.

[0003] First, batteries generate significant heat during charging and discharging, especially under high-current conditions. If this heat is not effectively dissipated, it can lead to thermal runaway, compromising system safety. Second, traditional air-cooling or liquid-cooling methods have limited efficiency in handling high-energy-density battery clusters, failing to meet the ever-increasing heat demands. Finally, existing liquid-cooling systems typically require the activation of a refrigeration cycle to regulate temperature in low-temperature environments, increasing energy consumption and wasting considerable electrical energy. Therefore, achieving efficient heat dissipation while minimizing energy waste is a key technological challenge for improving the performance and safety of energy storage systems. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: how to provide a submerged high-voltage cascaded energy storage system battery compartment that can reduce energy waste while achieving efficient heat dissipation.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A submerged high-voltage cascaded energy storage system battery compartment includes a battery rack, a liquid cooling host, a liquid cooling circulation pipeline, and a water-to-water exchanger. Multiple battery packs are installed on the battery rack. The battery pack contains cooling oil and battery cells submerged in the cooling oil. A liquid cooling plate is fixed to the bottom of each battery cell. The liquid cooling circulation pipeline connects the liquid cooling plate, the first channel of the water-to-water exchanger, and the liquid cooling host in series to form a closed circulation loop. The second channel of the water-to-water exchanger is connected to external circulating water for heat exchange of the coolant in the first channel of the water-to-water exchanger.

[0007] In this invention, immersion cooling ensures the temperature uniformity and intrinsic safety of the battery cells, greatly reducing the risk of thermal runaway; active cooling with a liquid cooling plate provides powerful heat transfer capabilities; and a series-connected water exchanger provides an energy-saving heat dissipation method. The combination of these three elements achieves synergistic heat dissipation, solving the technical problems of high power consumption and high heat generation in high-voltage cascaded systems.

[0008] Furthermore, it also includes a container, within which a battery compartment and a liquid-cooled main unit compartment are separated by partitions. The battery rack is located in the battery compartment, and the liquid-cooled main unit is located in the liquid-cooled main unit compartment. The partitions serve to prevent fire and smoke, and can effectively control the scope of an accident should a malfunction occur in one area.

[0009] Furthermore, several battery rack fixing beams are arranged at the bottom of the battery compartment, and high-voltage insulating bases are fixed to the bottom of the battery racks. The high-voltage insulating bases are bolted to the battery rack fixing beams. The battery rack fixing beams (such as square tubing or channel steel) significantly enhance the load-bearing capacity and overall rigidity of the container floor during static loads and lifting, ensuring the structural safety of the equipment during transportation and installation. The high-voltage insulating base is a key structure for ensuring the safe operation of the high-voltage cascade system. It reliably insulates the entire battery rack and live components from the grounded container body, ensuring electrical clearance and creepage distance under high voltage, fundamentally preventing leakage and breakdown accidents.

[0010] Furthermore, the high-voltage insulating base is made of SMC material. SMC (sheet molding compound) material has extremely high insulation strength, arc resistance and low dielectric constant, making it an ideal material for manufacturing high-voltage insulating components, and it can work stably in high-voltage environments for a long time.

[0011] Furthermore, the water exchanger is fixed to the top of the container by bolts.

[0012] Furthermore, a protective cover is installed on the top of the water exchanger. This effectively prevents rainwater, dust, hail, fallen leaves, and other foreign objects from entering the water exchanger, ensuring its long-term stable and efficient operation and reducing maintenance needs.

[0013] Furthermore, a mesh panel is installed on the side of the container located within the liquid-cooled main unit compartment. The mesh panel ensures sufficient air intake and exhaust channels for the liquid-cooled main unit compartment, guaranteeing the efficient heat dissipation requirements of the liquid-cooled main unit condenser. Additionally, it effectively prevents larger foreign objects (such as small animals or tools) from entering the liquid-cooled main unit compartment, thus balancing heat dissipation and safety.

[0014] Furthermore, the container is also divided by partitions into a fire control room. Both the battery room and the liquid-cooled main unit room are equipped with fire sprinkler systems. The fire control room contains control devices for operating the fire sprinkler systems, and the container is equipped with a fire water inlet connected to the water supply of the fire sprinkler systems. The installation of fire sprinklers in both the battery room and the liquid-cooled main unit room achieves full coverage of critical areas. The independent fire control room centralizes fire early warning and control functions, facilitating monitoring and rapid response, and improving the efficiency and reliability of fire management.

[0015] Furthermore, the container body is equipped with lifting booms for easy hoisting and connection of the container. This provides standard and reliable lifting force points, enabling the entire container battery compartment to be hoisted, transported, and positioned conveniently and safely, greatly improving the convenience and efficiency of on-site construction.

[0016] Compared with existing technologies, this utility model has the following advantages: by combining the immersion of the battery cells in cooling oil, the placement of a liquid cooling plate at the bottom of the battery cells, and the connection of a water-water exchanger in series with the main liquid cooling circuit, a multi-layer heat dissipation system is constructed; immersion cooling, as the first line of defense, can quickly equalize heat and suppress thermal runaway; the liquid cooling plate, as the core of active heat dissipation, powerfully dissipates heat; and the water-water exchanger in series utilizes natural cold sources to pre-cool or completely cool the coolant in low-temperature environments. Thus, while ensuring heat dissipation, the energy consumption of the liquid cooling host is greatly reduced, achieving a balance between high efficiency and energy saving. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the internal structure of this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1 As shown, the battery compartment of the submerged high-voltage cascaded energy storage system in this specific embodiment includes a battery rack 1, a liquid cooling host 2, a liquid cooling circulation pipeline, and a water exchanger 3. Multiple battery packs 4 are installed on the battery rack 1. The battery pack 4 contains cooling oil and battery cells submerged in the cooling oil. A liquid cooling plate is fixed to the bottom of the battery cell. The liquid cooling circulation pipeline connects the liquid cooling plate, the first channel of the water exchanger 3, and the liquid cooling host 2 in series to form a closed circulation loop. The second channel of the water exchanger 3 is connected to external circulating water for heat exchange of the coolant in the first channel of the water exchanger 3.

[0020] In this specific embodiment, a container 5 is also included. Inside the container 5, a battery compartment and a liquid cooling host compartment are separated by a partition. The battery rack 1 is located in the battery compartment, and the liquid cooling host 3 is located in the liquid cooling host compartment.

[0021] In this specific embodiment, a plurality of battery rack fixing beams 6 are arranged at the bottom of the battery compartment, and a high-voltage insulating base 7 is fixed at the bottom of the battery rack 1. The high-voltage insulating base 7 is fixed to the battery rack fixing beams 6 by bolts.

[0022] In this specific embodiment, the high-voltage insulating base 7 is made of SMC material.

[0023] In this specific embodiment, the water exchanger 3 is fixed to the top of the container 5 by bolts.

[0024] In this specific embodiment, a protective cover is installed on the top of the water exchanger 3.

[0025] In this specific embodiment, a mesh plate 8 is installed on the side of the container 5 located in the liquid cooling host room.

[0026] In this specific embodiment, the container 5 is also divided into a fire control room by a partition. Both the battery room and the liquid cooling host room are equipped with fire sprinkler systems. The fire control room is equipped with a control device 9 for operating the fire sprinkler system. The container 5 is equipped with a fire water interface connected to the water supply end of the fire sprinkler system. In addition, a fire air intake window is installed on the side of the container 5 located in the fire control room to allow air to enter the cabin.

[0027] In this specific embodiment, the container 5 is equipped with a lifting rod 10 to facilitate the hoisting and connection of the container 5.

[0028] Cooling principle: The high-temperature coolant carrying battery heat from the liquid cooling plate first flows into the water exchanger. In low-temperature environments, the refrigeration compressor of the liquid-cooled unit can be turned off, and the high-temperature coolant exchanges heat with the low-temperature external circulating water in the water exchanger to achieve natural cooling, thereby significantly reducing the energy consumption of the liquid-cooled unit. In high-temperature environments, the liquid-cooled unit starts refrigeration to deeply cool the coolant that has been pre-cooled by the water exchanger, ensuring heat dissipation effect.

[0029] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A battery compartment for an immersion high-voltage cascaded energy storage system, characterized in that: The device includes a battery rack, a liquid cooling unit, liquid cooling circulation pipes, and a water-to-water exchanger. Multiple battery packs are installed on the battery rack. The battery pack contains cooling oil and battery cells immersed in the cooling oil. A liquid cooling plate is fixed to the bottom of each battery cell. The liquid cooling circulation pipes are connected in series with the liquid cooling plate, the first channel of the water-to-water exchanger, and the liquid cooling unit to form a closed circulation loop. The second channel of the water-to-water exchanger is connected to external circulating water for heat exchange of the coolant in the first channel of the water-to-water exchanger.

2. The battery compartment of the submerged high-voltage cascaded energy storage system according to claim 1, characterized in that: It also includes a container, which is separated into a battery compartment and a liquid-cooled host compartment by a partition. The battery rack is located in the battery compartment, and the liquid-cooled host is located in the liquid-cooled host compartment.

3. The battery compartment of the submerged high-voltage cascaded energy storage system according to claim 2, characterized in that: The bottom of the battery compartment is provided with several battery rack fixing beams, and the bottom of the battery rack is fixed with a high-voltage insulating base, which is fixed to the battery rack fixing beams by bolts.

4. The battery compartment of the submerged high-voltage cascaded energy storage system according to claim 3, characterized in that: The high-voltage insulating base is made of SMC material.

5. The battery compartment of the submerged high-voltage cascaded energy storage system according to claim 2, characterized in that: The water exchanger is bolted to the top of the container.

6. The battery compartment of the submerged high-voltage cascaded energy storage system according to claim 5, characterized in that: The top of the water exchanger is equipped with a protective cover.

7. The battery compartment of the submerged high-voltage cascaded energy storage system according to claim 2, characterized in that: The container is equipped with a mesh panel on its side, located in the liquid cooling unit compartment.

8. The battery compartment of the submerged high-voltage cascaded energy storage system according to claim 2, characterized in that: The container is also divided by partitions into a fire control room, and both the battery room and the liquid cooling host room are equipped with fire sprinkler systems. The fire control room is equipped with a control device for operating the fire sprinkler system, and the container is equipped with a fire water interface that connects to the water supply end of the fire sprinkler system.

9. The battery compartment of the submerged high-voltage cascaded energy storage system according to claim 2, characterized in that: The container body is equipped with lifting rods to facilitate the hoisting and connection of the container.

Images