Full-submersion energy storage tank based on multi-material composite sealing structure

Abstract

The application relates to the technical field of battery packs, and discloses a full-submersion energy storage box based on a multi-material composite sealing structure, which comprises a box body, a box cover and a bearing assembly, a shielding and separating assembly is arranged between the inner wall of the box body and the bearing assembly, a cooling liquid heat exchange interlayer is divided into a liquid flow area and a gas flow area, an air inlet structure and an air outlet structure are arranged on the box body, and a liquid-driven air extraction assembly is arranged on the shielding and separating assembly; the application utilizes local flushing and pressure fluctuation generated by cooling liquid flow to drive gas to flow along a main sealing boundary and be discharged, realizes liquid separation protection and moisture removal and drying, and improves long-term operation sealing stability.

Description

Technical Field

[0001] This application relates to the field of battery pack technology, specifically to a fully submerged energy storage box based on a multi-material composite sealing structure. Background Technology

[0002] As energy storage systems develop towards higher energy density and higher safety, the use of liquid media for thermal management in energy storage enclosures is gradually increasing. Compared to air cooling and conventional cold plate liquid cooling, utilizing coolant circulating inside the enclosure or within its interlayer to exchange heat with the cells or supporting components can improve heat exchange efficiency and temperature uniformity within the enclosure to a certain extent. Therefore, it is being used more and more widely in energy storage battery packs and energy storage systems.

[0003] For example, Chinese patent application CN116845425A discloses a liquid-cooled battery pack and battery energy storage system. The liquid-cooled battery pack includes a housing, battery modules, and a fire suppression system. The housing has a first chamber, a second chamber, and a third chamber. The battery modules are disposed in the third chamber. Coolant flows around the outside of the battery compartment to dissipate heat from the battery modules. The first and second chambers, along with related piping, facilitate the input and output of the coolant, thereby improving heat exchange efficiency and temperature uniformity. This application also demonstrates that, in existing energy storage thermal management structures, the multi-chamber arrangement within the housing, the circulating flow of the coolant, and the indirect heat exchange around the battery modules have become a feasible technical approach.

[0004] In this type of structure, coolant typically fills the heat exchange interlayer between the outer side of the load-bearing component and the inner wall of the housing for extended periods. The housing cover, the edge of the housing, and the edge of the internal load-bearing component together form a circumferential sealing boundary. Because one side of this circumferential sealing boundary is constantly exposed to a liquid environment, and the coolant experiences strong fluid scouring and pressure fluctuations in localized areas, especially near the outlet, confluence area, or turning point, this sealing boundary must not only withstand long-term immersion but also cope with additional load variations caused by uneven local operating conditions. Under these conditions, if a static sealing method with completely identical structures at all locations is still used, such as ordinary sealing strips or uniform compression sealing structures, it is often difficult to adaptively adjust to differences in localized fluid scouring and pressure fluctuations, easily leading to seal degradation first appearing in high-risk areas.

[0005] Furthermore, for energy storage tanks with internal load-bearing frames, circumferential interlayered flow channels, and fixed boundaries for the tank cover, the circumferential sealing boundary is typically quite long. There are multiple overlapping layers between the edges of the load-bearing components and the tank body edges and cover. Locally, thermal deformation differences, fluid pulsation, and long-term wetting effects also play a role. Current technologies mostly focus on addressing leakage by increasing initial clamping force, adding ordinary sealing rings, or using single-material seals. However, they fail to adequately utilize local pressure feedback under long-term liquid filling conditions and lack composite sealing structure designs capable of adaptive compensation based on local scouring and pressure fluctuations. Therefore, during long-term operation, the circumferential sealing boundary near the liquid outlet or local confluence area still faces the risks of chronic micro-leakage, localized moisture accumulation, and reduced seal life.

[0006] Therefore, it is still necessary to provide a fully submerged energy storage tank based on a multi-material composite sealing structure, so as to at least solve the problems of existing energy storage tanks where the circumferential sealing boundary is difficult to achieve adaptive adjustment, and local sealing decay and chronic micro-leakage are prone to occur under the conditions of long-term filling of the heat exchange jacket with coolant and local fluid scouring and uneven pressure fluctuation. Summary of the Invention

[0007] The purpose of this application is to provide a fully submerged energy storage tank based on a multi-material composite sealing structure, in order to solve the problem that in existing energy storage tanks, the coolant is constantly filled in the heat exchange interlayer between the outer side of the supporting component and the inner wall of the tank, which easily leads to strong fluid scouring and pressure fluctuations in local areas such as near the liquid outlet. Furthermore, the existing uniform static sealing structure is difficult to effectively isolate and protect the main sealing boundary and continuously dehumidify it, resulting in the main sealing boundary being in a humid environment for a long time, which easily leads to local sealing attenuation and chronic micro-seepage.

[0008] To achieve the above objectives, this application provides the following technical solution:

[0009] This application provides a fully submerged energy storage tank based on a multi-material composite sealing structure, including a tank body, a tank cover, and a load-bearing component disposed within the tank body. A coolant heat exchange jacket is formed between the outer side of the load-bearing component and the inner wall of the tank body. A shielding and separating component is disposed between the inner wall of the tank body and the load-bearing component. The shielding and separating component is used to divide the coolant heat exchange jacket into a liquid flow zone at the bottom and a gas flow zone at the top. The tank body is provided with an air inlet structure and an exhaust structure respectively connected to the gas flow zone. A hydraulically driven air extraction component is disposed on the shielding and separating component. The hydraulically driven air extraction component is used to drive the gas in the gas flow zone to flow along the main sealing boundary and be discharged through the exhaust structure when the coolant flow causes local scouring and pressure fluctuations, thereby providing liquid isolation protection and dehumidification and drying for the main sealing boundary.

[0010] Furthermore, the main sealing boundary is the circumferential sealing boundary formed by the abutment of the edge of the load-bearing component, the edge of the housing, and the edge of the housing cover.

[0011] Furthermore, the load-bearing component includes a support frame, the edge of which extends outward and is bent to fit against the edge of the box body, and the edge of the box cover is pressed and fixed to the edge of the support frame and the edge of the box body.

[0012] Furthermore, a groove extending circumferentially is provided at the bottom edge of the support frame, and a sealing ring is provided in the groove. The edge of the shielding and separating component extends upward into the groove, and the top of the edge of the shielding and separating component abuts against the sealing ring to separate the liquid flow area from the gas flow area.

[0013] Furthermore, the shielding and partitioning component is arranged in a rectangular frame along the inner wall of the box. The upper edge of the shielding and partitioning component, together with the edge of the box, the edge of the supporting component, and the box cover, forms a gas flow zone. The area below the lower edge of the shielding and partitioning component, together with the outer wall of the supporting component and the inner wall of the box, forms a liquid flow zone.

[0014] Furthermore, the hydraulic pumping assembly includes a wave element located in the liquid flow zone, a flexible diaphragm sealed to the wave element, and a gas pump chamber partially enclosed by the flexible diaphragm and the shielding and separating assembly. An elastic element for resetting the flexible diaphragm is provided between the flexible diaphragm and the shielding and separating assembly.

[0015] Furthermore, when the liquid flow causes local scouring and pressure fluctuations on the oscillating component, the oscillating component drives the flexible diaphragm to move back and forth, so that the volume of the gas pump chamber changes alternately, and drives the gas in the gas flow zone to flow along the main sealing boundary.

[0016] Furthermore, the wave element is positioned on the side close to the exhaust structure and located within a local confluence area of ​​the liquid flow zone to enhance the driving effect of the liquid flow on the wave element.

[0017] Furthermore, one-way valves are installed at both the intake and exhaust structures. The intake structure only allows external air to enter the gas flow zone, and the exhaust structure only allows gas within the gas flow zone to exit. Through the one-way conduction of the intake and exhaust structures, in conjunction with the hydraulic pumping assembly, a one-way airflow is formed within the gas flow zone, flowing along the main sealing boundary.

[0018] Furthermore, the housing is also equipped with a chamber for accommodating the battery cells. Coolant enters the coolant heat exchange jacket and flows in the liquid flow zone before being discharged, so as to exchange heat with the battery cells in the chamber through the wall of the supporting component.

[0019] The technical solution provided in this application has the following advantages compared with the prior art:

[0020] 1. This application divides the coolant heat exchange jacket into a lower liquid flow zone and an upper gas flow zone by setting a shielding and separating component between the load-bearing component and the inner wall of the housing. This changes the working state of the main sealing boundary from being directly scoured by the liquid to a protected state that is isolated from the main liquid flow. This avoids the main coolant flow and local scour and pressure fluctuations from directly acting on the main sealing boundary, reduces the risk of local seal decay, and improves the stability and reliability of the main sealing boundary under long-term operating conditions.

[0021] 2. This application, by setting up a hydraulic pumping component linked to the liquid flow zone and the gas flow zone, and in conjunction with the air intake and exhaust structures, transforms the local scouring and pressure fluctuations generated by the coolant flow into airflow flowing along the main sealing boundary within the gas flow zone. This continuously removes water vapor and moisture near the main sealing boundary, alleviating the long-term dampness and water vapor retention problem in the sealing area, achieving active dehumidification and drying protection of the main sealing boundary, and thus reducing the possibility of chronic micro-seepage. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying 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.

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the assembly of the load-bearing component and the housing in an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the structure of the carrier component in the embodiments of this application;

[0026] Figure 4 This is a schematic diagram of the hydraulic pumping assembly in an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the structure of the coolant heat exchange jacket in the embodiments of this application;

[0028] Figure 6 for Figure 5 Enlarged view of the structure of section A;

[0029] Figure 7 This is a schematic diagram of the structure of the shading and separating component in the embodiments of this application;

[0030] Figure 8 This is a schematic diagram of the structure with multiple oscillating elements in the embodiments of this application.

[0031] Explanation of icon numbers:

[0032] 1. Housing; 13. Intake structure; 14. Exhaust structure; 15. Coolant heat exchange jacket; 16. Liquid flow zone; 17. Gas flow zone;

[0033] 2. Box lid;

[0034] 3. Load-bearing component; 31. Support frame; 32. Chamber; 33. Battery cell; 34. Groove; 35. Sealing ring;

[0035] 4. Obstruction and separation components;

[0036] 5. Hydraulic pumping assembly; 51. Fluctuating component; 52. Flexible diaphragm; 53. Gas pump chamber; 54. Elastic component;

[0037] 6. Main sealing boundary. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0039] The present application will be further described below with reference to embodiments.

[0040] Example 1

[0041] In existing fully submerged energy storage tanks, a coolant heat exchange jacket 15 is formed by combining a housing 1, a cover 2, and a support frame 31. The coolant typically remains in the sealed jacket between the outer side of the support frame 31 and the inner wall of the housing 1, exchanging heat with the battery cells 33 housed within the support frame 31 through the support frame wall. In this structure, one side of the circumferential sealing boundary formed by the abutting edges of the support frame 31, the housing 1, and the cover 2 is constantly near the coolant environment, especially near the drain end. Due to localized confluence, turning, scouring, and pressure fluctuations during coolant flow, the area adjacent to the main sealing boundary 6 is prone to prolonged wetting, and may even develop localized wetting. In existing technologies, water vapor accumulation is often caused by static sealing methods with uniform settings to seal the entire boundary. The sealing conditions are basically the same everywhere, making it difficult to provide targeted protection based on the actual working conditions of local high-risk areas. At the same time, there is a lack of effective isolation between the mainstream coolant and the main sealing boundary 6, making it difficult for local water vapor to be discharged in time. After long-term operation, problems such as local moisture accumulation, chronic micro-seepage, and deterioration of sealing performance can easily occur at the main sealing boundary 6. Therefore, it is necessary to provide a structural solution that can isolate the mainstream liquid from the main sealing boundary 6 and use the local scouring and pressure fluctuations generated by the liquid flow to drive gas flow, so as to continuously dehumidify and dry the main sealing boundary 6.

[0042] Reference Figure 1 - Figure 7 This embodiment provides a fully submerged energy storage tank based on a multi-material composite sealing structure, including a tank body 1, a tank cover 2, and a support assembly 3 disposed within the tank body 1. A coolant heat exchange jacket 15 is formed between the outer side of the support assembly 3 and the inner wall of the tank body 1. In this embodiment, the support assembly 3 is a support frame 31. Support rods are fixedly arranged at intervals at the bottom of the tank body 1, and the bottom of the support frame 31 abuts against the top of the support rods to form a continuous coolant flow space between the outer wall of the support frame 31 and the inner wall of the tank body 1. A partition structure is provided at the center of the support frame 31, which divides the support frame 3... The internal space is divided into two chambers 32 for accommodating the battery cells 33. The battery cells 33 are placed in the two chambers 32. The coolant does not directly contact the battery cells 33, but indirectly cools the battery cells 33 by conducting heat through the wall of the support frame 31. One end of the partition structure is provided with a liquid inlet passage, and the other end of the partition structure away from the liquid inlet passage is provided with a liquid distribution passage. After the coolant enters, it is distributed to the corresponding coolant heat exchange jacket 15 on the outside of the two chambers 32, and then flows along the jacket between the outer wall of the support frame 31 and the inner wall of the box 1 before being discharged, thus forming an indirect liquid cooling heat exchange path.

[0043] The edge of the support frame 31 extends outward and bends to fit against the edge of the box body 1. The edge of the box cover 2 is pressed and fixed to the edge of the support frame 31 and the edge of the box body 1, thereby forming a circumferential clamping boundary. A main sealing boundary 6 is formed at this circumferential clamping boundary. In order to prevent the main sealing boundary 6 from being directly exposed to the mainstream liquid environment, a shielding and separating component 4 is provided between the inner wall of the box body 1 and the support frame 31. The shielding and separating component 4 is arranged in a rectangular frame shape along the circumference of the inner wall of the box body 1. The side of the shielding and separating component 4 near the support frame 31 cooperates with the outer wall of the support frame 31, thereby separating the coolant heat exchange jacket 15 between the outer side of the support frame 31 and the inner wall of the box body 1 into a liquid flow zone 16 located at the bottom and a gas flow zone 17 located at the top.

[0044] Furthermore, the shielding and separating component 4 is preferably made of a metal material with good thermal conductivity, preferably an aluminum alloy plate or an aluminum-based composite plate, and forms a thin-walled frame structure to reduce the thermal resistance while ensuring the strength of the separation support. Since the lower side of the shielding and separating component 4 is adjacent to the liquid flow zone 16 and the upper side is adjacent to the gas flow zone 17, the coolant in the liquid flow zone 16 after heating can transfer heat to the shielding and separating component 4, and the shielding and separating component 4 can further conduct the heat to the gas flow zone 17, thereby heating the air flowing along the gas flow zone 17, so that the air maintains a high temperature during the flow and dehumidification process, thereby improving the ability to carry away water vapor and moisture near the main sealing boundary 6.

[0045] The upper edge of the shielding and partitioning component 4, together with the edge of the housing 1, the edge of the support frame 31, and the housing cover 2, forms a closed gas flow zone 17. The area below the lower edge of the shielding and partitioning component 4, together with the outer wall of the support frame 31 and the inner wall of the housing 1, forms a liquid flow zone 16. The main flow of coolant circulates in the liquid flow zone 16, while the main sealing boundary 6 is located within the gas flow zone 17, thereby achieving the first layer of spatial separation between the main flow of liquid and the main sealing boundary 6.

[0046] To ensure reliable isolation between the liquid flow zone 16 and the gas flow zone 17, a circumferentially extending groove 34 is provided at the bottom edge of the support frame 31. A sealing ring 35 is provided in the groove 34. The edge of the shielding and separating component 4 extends upward into the groove 34, and the top edge of the shielding and separating component 4 abuts against the sealing ring 35. In this way, after the support frame 31 is installed into the housing 1 and pressed and fixed together with the housing cover 2, the edge of the shielding and separating component 4 forms a stable sealing fit with the edge of the support frame 31 through the sealing ring 35, making it difficult for the coolant in the liquid flow zone 16 to flow upward into the gas flow zone 17. At the same time, it also provides the basic sealing conditions for the gas flow zone 17 to form a directional airflow.

[0047] Furthermore, as the coolant continuously absorbs the heat conducted by the wall of the support frame 31 during the operation of the device, the support frame 31 will undergo a certain degree of thermal expansion deformation under working conditions. The original sealing fit between the edge of the support frame 31 and the shielding and separating component 4 becomes even tighter under the action of thermal expansion, which increases the contact compression between the edge of the shielding and separating component 4 and the sealing ring 35, thereby improving the sealing effect between the liquid flow area 16 and the gas flow area 17. Therefore, in this embodiment, the seal between the support frame 31 and the shielding and separating component 4 not only relies on the mechanical pressing action formed during assembly, but also utilizes the thermal expansion characteristics generated by the temperature rise of the support frame 31 during the operation of the device to achieve a further self-reinforcing seal under operating conditions.

[0048] In this embodiment, the sealing ring 35 can be an elastic sealing ring, and its material can be a rubber material, a silicone-based elastic material, or a fluororubber material that is resistant to coolant media. The shielding and separating component 4 can be made of a rigid support material, such as a metal plate, a composite plate, or a media-resistant engineering plastic part, which can together with the sealing ring 35 form a multi-material composite sealing structure.

[0049] An air intake structure 13 connected to the gas flow zone 17 is provided on the side of the housing 1 away from the exhaust structure 14, and an exhaust structure 14 connected to the gas flow zone 17 is provided on the side near the drain end. Both the air intake structure 13 and the exhaust structure 14 are equipped with one-way valves. The air intake structure 13 only allows external air to enter the gas flow zone 17, and the exhaust structure 14 only allows gas in the gas flow zone 17 to be discharged. In this way, the gas flow zone 17 can form a unidirectional airflow with a fixed direction under the action of the hydraulic pumping assembly 5, and will not allow the humid air to stay near the main sealing boundary 6 again when the airflow returns.

[0050] The shielding and separating assembly 4 is equipped with a hydraulically driven suction assembly 5 near the exhaust structure 14. The hydraulically driven suction assembly 5 includes a wave element 51 located in the liquid flow zone 16, a flexible diaphragm 52 sealed to the wave element 51, and a gas pump chamber 53 partially enclosed by the flexible diaphragm 52 and the shielding and separating assembly 4. An elastic element 54 for resetting the flexible diaphragm 52 is provided between the flexible diaphragm 52 and the shielding and separating assembly 4. The wave element 51 is located on the side near the drain end and in the local confluence area of ​​the liquid flow zone 16. The reason for this arrangement is that the side near the drain end is usually the area where the local confluence and flow disturbance of the coolant are more obvious, and the liquid flow rate changes and local impacts are more pronounced. The pressure fluctuations in the brush area are greater than in other areas, which can more effectively drive the movement of the oscillating element 51. The oscillating element 51 can be plate-shaped, sheet-shaped, or shell-shaped. Under the action of liquid flow scouring, it moves up and down or back and forth. The oscillating element 51 itself is not directly connected to the gas flow area 17, but is separated from the gas pump chamber 53 by the flexible diaphragm 52. When the oscillating element 51 is displaced by the liquid flow, it drives the flexible diaphragm 52 to reciprocate and deform, thereby causing the volume of the gas pump chamber 53 to change alternately. The elastic element 54 provided between the flexible diaphragm 52 and the shielding and separating component 4 is used to return the flexible diaphragm 52 and the oscillating element 51 to their initial positions when the liquid flow scouring weakens, so that the hydraulic pumping component 5 can work continuously.

[0051] The working process of this embodiment is as follows: After the coolant enters the coolant heat exchange jacket 15, it flows along the outer wall of the support frame 31 in the liquid flow zone 16, and exchanges heat with the battery cell 33 in the inner cavity 32 of the support frame 31 through the wall of the support frame 31. Since the shielding and separating component 4 divides the jacket space into upper and lower parts, the main coolant flow is always located in the lower liquid flow zone 16, and the main sealing boundary 6 is located in the upper gas flow zone 17, thereby avoiding the main coolant flow directly impacting the main sealing boundary 6. Especially on the side near the drain end, the local confluence, scouring and pressure wave generated by the liquid flow acts on the oscillating component 51, causing the oscillating component 51 to drive the flexible diaphragm 52 to move back and forth, thereby causing the gas pump chamber 53 to move back and forth. With alternating volume changes, and in conjunction with the one-way valve, when the volume of the gas pump chamber 53 increases, external air is drawn into the gas flow zone 17 through the air intake structure 13. When the volume of the gas pump chamber 53 decreases, the air in the gas flow zone 17 is pushed towards the exhaust structure 14 and discharged. This cycle repeats, forming a one-way airflow along the main sealing boundary 6 within the gas flow zone 17. This one-way airflow can, on the one hand, form a gas protective layer on the main sealing boundary 6, reducing the chance of liquid and water vapor being directly trapped on the main sealing boundary 6. On the other hand, it can continuously remove moisture and water vapor near the main sealing boundary 6, keeping the main sealing boundary 6 relatively dry, thereby reducing the risk of chronic micro-leakage caused by moisture accumulation during long-term operation.

[0052] In this embodiment, the shielding and separating component 4, the sealing ring 35, the flexible diaphragm 52, and the one-way valve are composed of different functional materials. The rigid component is used to form a liquid-gas partition and structural support, the elastic component is used to achieve sealing and flexible air extraction, and the one-way guiding component is used to form directional airflow, thus forming an overall technical solution based on a multi-material composite sealing structure.

[0053] Example 2

[0054] Reference Figure 8 This embodiment is a further optimized implementation based on embodiment 1. The similarities with embodiment 1 will not be repeated. The difference is that the hydraulic pumping component 5 and the gas flow zone 17 in this embodiment are further enhanced, so that the airflow in the gas flow zone 17 flows more evenly along the main sealing boundary 6, and achieves a stronger dehumidification effect in high-risk areas.

[0055] Specifically, in this embodiment, the shielding and separating component 4 is still arranged in a rectangular frame along the inner wall of the housing 1, and the bottom edge of the supporting frame 31 is still provided with a groove 34 extending circumferentially. A sealing ring 35 is provided in the groove 34. The edge of the shielding and separating component 4 extends upward and into the groove 34 to abut against the sealing ring 35, so as to separate the liquid flow area 16 from the gas flow area 17. Unlike embodiment 1, in this embodiment, the hydraulic pumping component 5 is set with two or more sets of circumferentially spaced wave units on the side near the exhaust structure 14. Each set of wave units corresponds to an independent gas pump chamber 53 partially enclosed by the shielding and separating component 4. Each independent gas pump chamber 53 is connected to the common gas flow area 17. In this way, on the side near the drain end, when the coolant generates uneven flow disturbance in the liquid flow area 16, the wave units at different positions can act according to the scouring strength at their respective positions, thereby improving the coverage of the pumping action and avoiding the uneven distribution of airflow caused by limiting the gas to a single point.

[0056] In this embodiment, the oscillating element 51 is preferably disposed at different high-disturbance positions in the liquid flow zone 16 near the discharge end, such as the expansion zone directly below the discharge structure, the guide cavity near the turning position, and the local confluence zone near the side corner of the discharge, so that the local scouring and pressure fluctuation of the liquid in this area can act on different oscillating units respectively. The flexible diaphragm 52 is sealed to each oscillating element 51, and elastic elements 54 are respectively disposed between each flexible diaphragm 52 and the shielding and separating component 4 to ensure that each oscillating unit can continuously oscillate under the action of liquid flow pulsation. Through the joint action of multiple oscillating units, a more continuous and stable unidirectional airflow is formed in the gas flow zone 17.

[0057] In practical use, in order to make the airflow in the upper gas flow zone 17 flow closer to the main sealing boundary 6, a guide flange or a guide surface can be set at the upper edge of the shielding and partitioning component 4 near the main sealing boundary 6. The guide flange or guide surface is used to form an edge guiding effect in the gas flow zone 17, so that the air flows closer to the main sealing boundary 6 formed by the edge of the support frame 31, the edge of the box 1, and the edge of the box cover 2 as it flows from the air intake structure 13 to the exhaust structure 14, thereby improving the local dehumidification effect. The guide flange can be integrally formed with the shielding and partitioning component 4, or it can be set on the upper edge of the shielding and partitioning component 4 by attachment. Its function is not to achieve liquid sealing, but to optimize the gas flow path so that the dry airflow can more fully cover the main sealing boundary 6.

[0058] In this embodiment, the coolant continues to flow within the liquid flow zone 16 and exchanges heat with the battery cell 33 through the wall of the support frame 31. When the coolant flows near the drain end, the liquid flow in multiple high-disturbance zones acts simultaneously on multiple oscillating units. Each oscillating element 51 drives the corresponding flexible diaphragm 52 and gas pump chamber 53 to undergo volume changes. With the cooperation of the one-way valves at the air intake structure 13 and the exhaust structure 14, a superimposed one-way airflow is formed in the gas flow zone 17. This airflow flows closer to the main sealing boundary 6 under the guidance of the air guide flange or the air guide surface, so that the moisture, water vapor and trace amounts of moisture that may seep into the upper area near the main sealing boundary 6 can be carried away more quickly. Compared with embodiment 1, the gas flow zone 17 in this embodiment has a more uniform coverage and stronger local dehumidification capability. It is particularly suitable for working conditions where the local flow near the drain end is more complex and the corner areas are more prone to moisture retention.

[0059] As can be seen from Example 2, this application is not limited to the form of a single oscillating element 51 and a single gas pump chamber 53. As long as the local scouring and pressure fluctuation in the liquid flow zone 16 can be used to drive the gas in the gas flow zone 17 to flow along the main sealing boundary 6, and achieve liquid isolation protection and dehumidification and drying of the main sealing boundary 6, it should fall within the protection scope of this application.

[0060] The working principle of this application is further explained as follows:

[0061] The core of this application is not simply adding a static seal, but rather separating the liquid mainstream area and the main sealing boundary 6 area by using the shielding and separating component 4. Then, the local scouring and pressure fluctuations in the liquid flow area 16 drive the hydraulic pumping component 5 to work, thereby forming a controlled gas flow environment outside the main sealing boundary 6. In other words, this application transforms the local fluid disturbances that are detrimental to the sealing in traditional sealing structures into a power source for maintaining the dryness of the main sealing boundary 6. In this way, not only can the direct impact of the liquid mainstream on the main sealing boundary 6 be reduced, but also the moisture and water vapor near the main sealing boundary 6 can be actively treated, so that the main sealing boundary 6 is in a relatively dry environment for a long time, thereby improving the long-term sealing reliability of the entire energy storage tank.

[0062] The significant advantages of this application are:

[0063] This application uses a shielding and separating component 4 to divide the coolant heat exchange jacket 15 into upper and lower functional areas, transforming the main sealing boundary 6 from a state directly impacted by the mainstream liquid flow to a protected state located within the upper gas flow zone 17. This firstly weakens the adverse effects of the liquid on the main sealing boundary 6 from a spatial structural perspective. At the same time, this application does not stop at simple isolation, but further utilizes a hydraulically driven air extraction component 5 to convert the local scouring and pressure fluctuations in the liquid flow zone 16 into directional airflow in the upper gas flow zone 17, creating a continuous dehumidification and drying airflow environment around the main sealing boundary 6. Thus, this application not only achieves liquid isolation protection but also active dehumidification protection. Compared with solutions that rely solely on static sealing contact, it can more effectively reduce the risk of chronic micro-leakage and improve the sealing stability under long-term operating conditions.

[0064] This application is not limited to the above-described embodiments. The above are merely preferred embodiments of this application. Those skilled in the art can adjust or replace the specific shape of the shielding and separating component 4, the specific form of the undulating component 51, the installation method of the flexible diaphragm 52, the arrangement of the air intake structure 13 and the exhaust structure 14, and the specific structure of the elastic component 54 without departing from the spirit and substance of this application. For example, the shielding and separating component 4 can be designed as a circumferential frame structure that adapts to the inner wall of the box 1 according to the shape of the box 1. The undulating component 51 can be a plate, a shell, or a leaf spring component. The elastic component 54 can be a spring, a spring sheet, an elastic sheet, or an elastic colloid. The air intake structure 13 and the exhaust structure 14 can be arranged at different ends of the box 1 according to the actual space. As long as they can cooperate with the hydraulic pumping component 5 to form an airflow along the main sealing boundary 6 in the gas flow area 17 and achieve liquid isolation protection and moisture removal and drying of the main sealing boundary 6, they all fall within the protection scope of this application.

[0065] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. 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 of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this application.

Claims

1. A fully submersible energy storage tank based on a multi-material composite sealing structure, comprising a tank body (1), a tank cover (2), and a load-bearing component (3) disposed within the tank body (1), wherein a coolant heat exchange jacket (15) is formed between the outer side of the load-bearing component (3) and the inner wall of the tank body (1), characterized in that, A shielding and separating component (4) is provided between the inner wall of the housing (1) and the supporting component (3). The shielding and separating component (4) is used to divide the coolant heat exchange jacket (15) into a liquid flow zone (16) located at the bottom and a gas flow zone (17) located at the top. The housing (1) is provided with an air intake structure (13) and an exhaust structure (14) respectively connected to the gas flow zone (17). A hydraulic suction component (5) is provided on the shielding and separating component (4). The hydraulic suction component (5) is used to drive the gas in the gas flow zone (17) to flow along the main sealing boundary (6) and through when the coolant flow generates local scouring and pressure fluctuations. The exhaust structure (14) discharges, thereby protecting the main sealing boundary (6) from liquid and drying it. The main sealing boundary (6) is a circumferential sealing boundary formed by the edge of the bearing component (3), the edge of the box body (1), and the edge of the box cover (2). The hydraulic pumping component (5) includes a wave element (51) located in the liquid flow area (16), a flexible diaphragm (52) sealed to the wave element (51), and a gas pump chamber (53) partially surrounded by the flexible diaphragm (52) and the shielding and separating component (4). An elastic element (54) for resetting the flexible diaphragm (52) is provided between the flexible diaphragm (52) and the shielding and separating component (4).

2. The fully submersible energy storage tank based on a multi-material composite sealing structure according to claim 1, characterized in that: The supporting component (3) includes a support frame (31), the edge of the support frame (31) extends outward and is bent to fit against the edge of the box body (1), and the edge of the box cover (2) is pressed and fixed to the edge of the support frame (31) and the edge of the box body (1).

3. The fully submersible energy storage tank based on a multi-material composite sealing structure according to claim 2, characterized in that: The support frame (31) has a groove (34) extending circumferentially at the bottom edge, and a sealing ring (35) is provided in the groove (34). The edge of the shielding and separating component (4) extends upward into the groove (34), and the top edge of the shielding and separating component (4) abuts against the sealing ring (35) to separate the liquid flow area (16) from the gas flow area (17).

4. A fully submersible energy storage tank based on a multi-material composite sealing structure according to claim 3, characterized in that: The shielding and separating component (4) is arranged in a rectangular frame along the inner wall of the box (1). The upper edge of the shielding and separating component (4) and the edge of the box (1), the edge of the supporting component (3) and the box cover (2) form the gas flow area (17). The area below the lower edge of the shielding and separating component (4) and the outer wall of the supporting component (3) and the inner wall of the box (1) form the liquid flow area (16).

5. A fully submersible energy storage tank based on a multi-material composite sealing structure according to claim 4, characterized in that: When the liquid flow causes local scouring and pressure fluctuations to the oscillating element (51), the oscillating element (51) drives the flexible diaphragm (52) to move back and forth, so that the volume of the gas pump chamber (53) changes alternately, and drives the gas in the gas flow zone (17) to flow along the main sealing boundary (6).

6. A fully submersible energy storage tank based on a multi-material composite sealing structure according to claim 5, characterized in that: The wave element (51) is disposed on one side near the exhaust structure (14) and located in the local confluence area of ​​the liquid flow zone (16) to enhance the driving effect of the liquid flow on the wave element (51).

7. A fully submersible energy storage tank based on a multi-material composite sealing structure according to claim 4, characterized in that: One-way valves are provided at both the air intake structure (13) and the exhaust structure (14). The air intake structure (13) allows only external air to enter the gas flow zone (17), and the exhaust structure (14) allows only the gas in the gas flow zone (17) to be discharged. Through the one-way conduction of the air intake structure (13) and the exhaust structure (14) in conjunction with the hydraulic pumping assembly (5), a one-way airflow is formed in the gas flow zone (17) along the main sealing boundary (6).

8. A fully submersible energy storage tank based on a multi-material composite sealing structure according to claim 1, characterized in that: The housing (1) is also provided with a chamber (32) for accommodating the battery cell (33). The coolant enters the coolant heat exchange jacket (15) and flows in the liquid flow zone (16) before being discharged, so as to exchange heat with the battery cell (33) in the chamber (32) through the wall of the bearing assembly (3).

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