Thermal management temperature control cover body of electrolytic bath

Abstract

The utility model discloses a thermal management temperature control cover body of an electrolytic bath, which comprises a heat preservation cover body with a multi-layer composite structure, the surface of the electrolytic bath is covered by the heat preservation cover body, the heat preservation cover body at least comprises an outer layer, a middle layer and an inner layer, the outer layer is a solid cover shell, the middle layer is a heat insulation filling layer, and the inner layer is a fitting heat preservation layer; and a multi-point array covered temperature monitoring mechanism for monitoring the temperature of the electrolytic cell is arranged in the heat preservation cover body. The thermal management temperature control cover body of the electrolytic bath adopts a multi-layer composite structure, the outer layer is corrosion-resistant, the middle layer is low in heat conduction, the inner layer is attached for heat preservation, and the heat loss rate is reduced to be below 5%. And a multi-point array temperature monitoring mechanism is arranged, so that the temperature change can be accurately sensed. The modular design supports disassembly and assembly by a single person within 30 minutes, and maintenance is convenient. The carbon fiber heating film, the electric shutter and the air gap adjusting technology are combined, dynamic temperature control and efficient energy saving are achieved, and the device is suitable for complex working conditions of green hydrogen preparation.

Description

Technical Field

[0001] This utility model relates to the field of electrolytic cell technology, specifically to a thermal management and temperature control cover for an electrolytic cell. Background Technology

[0002] In the field of green hydrogen production, thermal management of electrolyzers has always been a key challenge affecting hydrogen production efficiency and cost. Traditional insulation systems mostly use single rock wool or polyurethane foam materials. These materials not only have high thermal conductivity but are also prone to moisture absorption and aging over long-term use, leading to a significant decrease in insulation performance. For example, in low-temperature environments, a large amount of heat is lost from the surface of the electrolyzer through the material itself and structural gaps, with a heat loss rate as high as 20% to 30%, which significantly increases the cost of green hydrogen production. Moreover, problems such as direct contact between the electrolyzer and the surface metal frame in traditional insulation structures create multiple "thermal bridges," further exacerbating heat loss. It's like countless tiny channels constantly carrying away heat, resulting in serious energy waste.

[0003] On the other hand, the intermittent nature of green electricity such as wind and solar power necessitates frequent start-ups and shutdowns of electrolyzers. Traditional insulation systems rely entirely on manual inspections to adjust heat dissipation and heating equipment. Operators often only discover problems after a significant temperature anomaly has been detected, and the time from noticing the anomaly to manually adjusting the equipment is lengthy, resulting in temperature fluctuations as high as ±10℃. This drastic temperature change is akin to operating the equipment in extreme temperatures, accelerating the aging of components such as gaskets and electrodes, shortening their lifespan, and potentially causing localized overheating and decomposition of the electrolyte, reducing hydrogen purity.

[0004] In terms of operation and maintenance, traditional insulation covers are mostly integral structures, requiring complete disassembly for maintenance. This is not only time-consuming and labor-intensive, with a single maintenance often taking 4 to 6 hours or even longer, but also means that if a component fails, the entire cover may need to be replaced, resulting in high costs. Furthermore, traditional insulation systems are independent of the electrolytic cell's liquid supply and power supply systems. Temperature monitoring data can only be displayed locally and cannot be integrated into the industrial control system. Fault warnings rely entirely on manual judgment, making it easy to miss faults and hindering timely detection and handling of equipment failures, thus affecting the continuity and stability of production.

[0005] Furthermore, traditional insulation materials perform poorly under harsh conditions such as strong corrosion and high pressure. Ordinary carbon steel or stainless steel shells lack sufficient corrosion resistance; electrolyte vapors and salt spray environments easily cause corrosion and perforation. Ordinary rubber sealing strips age rapidly under high pressure, their compressibility decreasing and sealing performance weakening. External moisture intruding into the insulation layer not only further reduces insulation effectiveness but may also trigger safety risks such as short circuits in the electrolyzer. These interconnected problems make traditional insulation systems insufficient in terms of energy efficiency, reliability, and intelligence to meet the demands of large-scale green hydrogen production, urgently requiring a more efficient, intelligent, and reliable solution to address these challenges.

[0006] For the reasons mentioned above, it is necessary to propose a thermal management and temperature control enclosure for electrolytic cells to solve the aforementioned problems. Utility Model Content

[0007] The purpose of this invention is to overcome the defects in the existing technology and provide a thermal management temperature control cover for an electrolytic cell.

[0008] To achieve the above objectives, the technical solution of this utility model is as follows:

[0009] An electrolytic cell thermal management temperature control cover includes a multi-layer composite insulation cover, the surface of the electrolytic cell is covered by the insulation cover, the insulation cover includes at least an outer layer, a middle layer and an inner layer, the outer layer is a solid shell, the middle layer is a heat insulation filling layer, and the inner layer is a laminated insulation layer; the insulation cover is provided with a multi-point array temperature monitoring mechanism for monitoring the temperature of the electrolytic cell.

[0010] Furthermore, the insulation cover is a modular quick-release structure, which includes a top cover module, a side panel module, and an end panel module. The top cover module is equipped with an adjustable electric louver.

[0011] Furthermore, the outer layer includes a magnesium-aluminum alloy casing, and a nano-ceramic coating is provided on the surface of the outer casing;

[0012] The middle layer comprises a vacuum insulation panel and an aerogel composite material;

[0013] The inner layer includes a flexible aluminum silicate fiber layer.

[0014] Furthermore, the inner side of the heat insulation cover is also provided with an electric heating film layer, which includes a carbon fiber heating film.

[0015] Furthermore, the temperature detection mechanism includes a flexible thin-film temperature sensor, a fiber Bragg grating (FBG) sensor, an infrared array sensor, a thermocouple or a resistance temperature detector (RTD) sensor; it also includes a composite sensor module, which includes a humidity sensor and a pH sensor.

[0016] Furthermore, the temperature monitoring mechanism includes a curved frame adapted to the curved shape of the electrolytic cell surface. The curved frame has a mounting groove for embedding and installing a temperature sensor on the side facing the electrolytic cell. The surface of the mounting groove has a heat conduction optimization interface for encapsulating the temperature sensor therein. The heat conduction optimization interface includes graphene thermal conductive gel and high-temperature pressure-sensitive tape.

[0017] Furthermore, the temperature monitoring mechanism forms a segmented temperature sensor array with the heat insulation cover module as the unit; the heat insulation cover module forms an arc-shaped segmented module, and the segmented modules are connected to form a ring-shaped mesh multi-point temperature monitoring array that surrounds and adheres to the electrolytic cell.

[0018] Furthermore, an adjustable air gap is provided between the inner layer of the heat insulation cover and the surface of the electrolytic cell; the air gap is adjusted by an actively or passively driven air gap support unit; and several air gap support units are evenly distributed in each heat insulation cover module.

[0019] Furthermore, the air gap support unit includes a cavity, a drive rod, a phase change material, and an elastic element. The cavity is equipped with a drive rod that can be adjusted to move along its axial direction. One end of the drive rod extends out of the cavity. The cavity is equipped with an elastic element and a phase change material. A piston is provided at one end of the drive rod placed in the cavity. The piston divides the cavity into an elastic reset chamber and a phase change chamber. The elastic reset chamber is equipped with an elastic element, and the phase change chamber is equipped with a phase change material. The extension amount of the drive rod is controlled by the resultant force of the elastic element and the phase change material acting on the piston.

[0020] Furthermore, the heat insulation cover module includes a double-layered outer layer, which includes a fixed outer shell and a movable outer shell. The fixed outer shell is fitted over the movable outer shell. An air gap support unit is provided between the fixed outer shell and the movable outer shell. The fixed outer shell and the electrolytic cell are positioned relatively fixedly. The movable outer shell is provided with a middle layer and an inner layer in sequence on the side near the electrolytic cell. The fixed outer shell is provided with lateral ventilation holes around its perimeter near the electrolytic cell that match the air gap spacing.

[0021] The advantages and beneficial effects of this utility model are as follows:

[0022] 1. The magnesium-aluminum alloy outer shell of the thermal management and temperature control cover of this electrolytic cell is not only lightweight and sturdy, but its surface nano-ceramic coating can also effectively resist strong alkaline environments and salt spray corrosion, greatly extending the service life of the cover under harsh conditions; the middle layer of vacuum insulation board and aerogel composite material are a powerful combination, which greatly reduces the heat loss rate with its ultra-low thermal conductivity, while also being able to adapt to a wide temperature range; the inner flexible aluminum silicate fiber layer can closely fit the curved surface and complex structure of the electrolytic cell, eliminating the air thermal bridge problem that is easy to occur in traditional insulation layers, and the material is soft and can be cut, making installation very convenient and able to quickly adapt to electrolytic cells of different sizes.

[0023] 2. In terms of temperature monitoring and control, the multi-point array temperature monitoring mechanism integrates various types of sensors, enabling it to accurately capture local temperature changes and scan the entire area's heat distribution. Combined with a curved frame and highly efficient heat-conducting interface materials, this ensures more timely and accurate temperature monitoring. The segmented sensor array, working in conjunction with the modular enclosure structure, not only achieves comprehensive monitoring of the electrolytic cell but also allows for easy maintenance by simply disassembling the corresponding modules, significantly reducing the time required for fault location and repair.

[0024] 3. In terms of dynamic control and energy-saving design, the carbon fiber heating film's zoning allows for targeted heating of only low-temperature areas based on actual needs, avoiding energy waste. The motorized louvers dynamically adjust their opening based on temperature conditions, achieving an intelligent balance between heat dissipation and insulation. The air gap support unit utilizes the properties of phase change materials to automatically adjust the air gap spacing without additional energy, adapting to the frequent start-up and shutdown of the electrolytic cell. The double-layer shell and side ventilation holes further enhance heat dissipation capacity, preventing localized overheating of the equipment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a thermal management temperature control cover for an electrolytic cell according to this utility model;

[0026] Figure 2 This is an exploded cross-sectional view of the temperature control cover for the thermal management of the electrolytic cell in this utility model.

[0027] Figure 3 This is a schematic diagram of the longitudinal section structure of the temperature control cover for thermal management of the electrolytic cell in this utility model;

[0028] Figure 4 This is a schematic diagram of the surrounding multi-point temperature monitoring array network in this utility model;

[0029] Figure 5 This is an exploded view of the thermal insulation cover module in this utility model;

[0030] Figure 6 This is a structural schematic diagram of Embodiment 4 of this utility model;

[0031] In the diagram: 1. Insulation cover; 2. Electrolytic cell body; 3. Outer layer; 4. Middle layer; 5. Inner layer; 6. Temperature monitoring mechanism; 7. Top cover module; 8. Side plate module; 9. End plate module; 10. Motorized louvers; 11. Electric heating film layer; 12. Curved frame; 14. Segmented temperature sensor array; 15. Air gap spacing; 16. Air gap support unit; 17. Cavity; 18. Drive rod; 19. Phase change material; 20. Elastic element; 21. Piston; 22. Fixed outer shell; 23. Moving outer shell; 24. Side ventilation hole; 25. Circumferential array; 26. Magnet; 27. Sliding key; 28. T-slot; 29. ​​Cylindrical slot. Detailed Implementation

[0032] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0033] Example 1:

[0034] A thermal management and temperature control cover for an electrolytic cell includes a multi-layered composite insulation cover 1. The surface of the electrolytic cell is covered by the insulation cover 1. The insulation cover 1 includes at least an outer layer 3, a middle layer 4, and an inner layer 5. In the prior art, the heat loss rate of the electrolytic cell surface is too high, reaching 20-30%, especially in low-temperature environments below 5 degrees Celsius, which leads to increased energy consumption. This temperature control cover, through its multi-layered composite insulation cover 1 structure, reduces the heat loss rate from the traditional 15-20% to below 5%. Specifically, as shown... Figure 1 , 2 As shown, the outer layer 3 of the insulation cover 1 is a solid shell, comprising a magnesium-aluminum alloy shell, and a nano-ceramic coating is applied to the surface of the outer layer 3 shell. In actual use, the outer layer 3 can be designed to be made of magnesium-aluminum alloy material with a thickness of 0.8-1.5mm. The nano-ceramic coating on the surface can form a protective layer resistant to strong alkali and salt spray corrosion, with an alkali resistance pH greater than 14. It can effectively protect the outer layer 3 shell and improve the service life and stability of the insulation cover 1 in harsh environments. In this embodiment, considering the environment of the electrolytic cell, the characteristics of resistance to strong alkali corrosion, salt spray corrosion, high temperature resistance, and heat preservation are required to prevent the coating from being corroded and peeled off. An oxide-based composite coating can be selected: using Al2O3 and ZrO2 as the base material, doped with SiO2, TiO2 and other nanoparticles. Alternatively, a salt spray corrosion-resistant nano-ceramic coating, a metal-ceramic composite coating: such as a Ni-P / Al2O3 nano-composite coating; or a rare earth doped coating: such as a Y2O3-doped TiO2 nano-coating.

[0035] The middle layer 4 of the insulation cover 1 is an insulation filling layer. Specifically, it can be a vacuum insulation board and an aerogel composite material with a thermal conductivity ≤0.02 W / (m·K), reducing heat loss by 60% compared to traditional rock wool. In this embodiment, the synergistic effect of the vacuum insulation board and the aerogel composite material achieves the dual goals of "ultra-low thermal conductivity and high environmental tolerance". It also forms a modular integrated solution with other components of the cover, such as the aluminum silicate fiber layer and the aluminum-magnesium alloy shell, effectively reducing the heat loss of the electrolytic cell. The core material of the vacuum insulation board is fumed silica or glass fiber felt with a thickness of 20-30mm, ensuring a highly efficient insulation structure after vacuuming. The surface is covered with an aluminum foil-nylon composite barrier film with low gas permeability, preventing external air from seeping in and disrupting the vacuum environment. By vacuuming (vacuum degree <10⁻²Pa), internal air convection is eliminated, and the insulation performance is more than 10 times that of traditional rock wool. The aerogel can be SiO2 aerogel. In this embodiment, the vacuum insulation board and aerogel can be combined in a layered stacking manner. The vacuum insulation board (outer side) and the aerogel composite board (inner side) are bonded with silicone adhesive (temperature resistance -60~200℃, bonding strength ≥0.5 MPa), and the total thickness is controlled at 20-40mm to form a dual heat preservation structure of "high vacuum barrier and nanoporous insulation".

[0036] The inner layer 5 of the insulation cover 1 is bonded with insulation material; the insulation material of the inner layer 5 can be a flexible aluminum silicate fiber layer. The flexible aluminum silicate fiber layer can withstand temperatures up to 1000℃, and when bonded to the surface of the electrolytic cell, it effectively reduces the thermal bridging effect.

[0037] Furthermore, the insulation cover 1 is equipped with a multi-point array temperature monitoring mechanism 6 for monitoring the temperature of the electrolytic cell. This temperature monitoring mechanism 6 is embedded in the inner wall of the insulation cover, thereby monitoring the surface temperature of the electrolytic cell from inside the insulation cover. Its multi-point array coverage structure can be represented as a circumferential array 25 on the surface of the electrolytic cell, i.e., sensors are evenly arranged around the circumference of the electrolytic cell, with an adjacent node spacing of 150-200mm, covering the curved surface of the electrolytic cell body; and a roll of circumferential array 25 is set at regular intervals along the axial length, the number of which is adjusted according to the length of the electrolytic cell. This forms a surrounding multi-point temperature monitoring array network, such as... Figure 4 As shown, each monitoring point corresponds to a local area on the surface of the electrolytic cell, and any two points are equidistant in both the circumferential and vertical directions to ensure that there are no blind spots in monitoring.

[0038] Take an electrolytic cell with a length of 2000mm and a diameter of 1000mm as an example.

[0039] Circumference 3140mm ÷ Spacing 200mm ≈ 16;

[0040] Each row of the circumference is equipped with 16-20 temperature sensors.

[0041] In the axial direction,

[0042] 2000mm ÷ spacing 500mm = 4 rows;

[0043] With four rows, the total number of monitoring points is 64-80. Those skilled in the art can increase or decrease the number as needed in actual use. This creates comprehensive coverage. This embodiment uses a grid layout to eliminate blind spots in single-point monitoring and can capture localized thermal anomalies with a diameter ≥50mm. In this implementation, temperature data is uploaded to the DCS system in real time, using 10Hz high-frequency sampling and fast transmission to ensure a delay ≤100ms, adapting to electrolytic cell load fluctuations and supporting DCS system zone control.

[0044] Example 2:

[0045] In this embodiment, the insulation cover 1 is designed as a modular quick-release structure, dividing the insulation cover 1 into a top cover module 7, a side panel module 8, and an end panel module 9, as follows: Figure 3 , 5 As shown, the slide rail is locked by a neodymium iron boron magnet 26 (magnetic force ≥30 N), allowing a single person to complete the assembly and disassembly within 30 minutes. The edges are sealed with fluororubber strips (compression rate 25%~30%), with a heat leakage rate ≤2%, making it suitable for high-pressure (5 MPa) environments.

[0046] Specifically, the top cover module 7 consists of: Outer layer 3: aluminum-magnesium alloy plate (1.0mm thick), with a nano-ceramic coating (resistant to strong alkalis and salt spray). Inner layer 5: aluminum silicate fiber layer (10mm thick), fitted to the curved surface of the electrolytic cell top. Middle layer: vacuum insulation board (20mm thick) and aerogel composite board (10mm thick). An electric louver 10, measuring 400mm × 300mm, is embedded in the center of the top layer, its opening adjusted via DCS commands. A built-in temperature sensor data acquisition module is included, with cables leading out through aviation connectors on the edge of the top cover.

[0047] Side panel modules 8 are symmetrically arranged on both sides of the electrolytic cell. They consist of: Outer layer 3: an aluminum-magnesium alloy plate, 1.2mm thick, with a radius of curvature consistent with the electrolytic cell, R=500mm; Inner layer 5: a flexible aluminum silicate fiber layer, 15mm thick, filling the space between the curved surface of the electrolytic cell and the insulation layer; Middle layer: a vacuum insulation board, 25mm thick; an aerogel composite board, 15mm thick, for a total insulation layer thickness of 40mm. A carbon fiber heating film with a power density of 3W / cm² is adhered to the inner wall, covering 60% of the inner surface of the side panel, and is zoned for control, with each heating film powered independently.

[0048] The end plate module has a 9-layer structure. The outer layer (3) is an aluminum-magnesium alloy plate, 1.0mm thick, with pipe perforations ≥50mm in diameter, and equipped with a fluororubber sealing ring. The inner layer (5) is a removable aluminum silicate fiber pad, 20mm thick, for easy disassembly during pipe maintenance. The middle layer is an aerogel composite board, 20mm thick. A vacuum insulation board is optional, considering the ease of end plate disassembly and assembly to avoid damage to the vacuum layer during installation and removal.

[0049] The sliding rail and magnet 26 have a convenient locking structure for easy installation and disassembly. Specifically, a sliding key 27 is provided on the surface of the electrolytic cell. This sliding key 27 can be fixedly welded to the side edge of the electrode plate, or it can be pre-installed at a predetermined position on the edge of the electrode plate. The sliding key 27 is then detachably fixed to the electrolytic cell using bolts or other methods. The cross-section of the sliding key 27 is T-shaped. Figure 6 As shown, it has a sliding rod part and a sliding cap part. The sliding rod part is a short cylindrical rod arranged radially along the electrolytic cell. A sliding cap part is connected to the end of the sliding rod part, and the sliding rod part is fixedly connected to the center of the sliding cap part. The sliding cap part is circular in shape, so that the cross-section of the sliding key 27 forms a T-shape. A T-shaped groove 28 matching the sliding key 27 is provided on the outer edge of the outer layer 3 of the heat preservation cover module. The T-shaped groove 28 forms a slide rail. Several neodymium iron boron magnets 26 with dimensions of Φ15mm×10mm, surface magnetic field strength ≥300mT, and magnetic force of a single magnet 26 ≥30N are uniformly embedded on the side edge of each module to avoid magnetic force cancellation during installation. Therefore, During installation, the T-shaped sliding key 27 on the electrolytic cell is inserted into the T-shaped groove 28, allowing the module to slide relative to the electrolytic cell along the direction of the T-shaped groove 28. This enables the two insulation cover modules 1 to be spliced ​​together. During splicing, the magnets 26 on the side walls of adjacent modules attract each other to lock the position, thus completing the rapid installation of the module. The aviation plug of the top cover module 7 is connected to the socket of the side panel module 8 to complete the circuit connection between the temperature sensor and the heating film. When there are multiple side panel modules 8 and top cover modules 7, they are connected to each other via aviation plugs to complete the circuit connection between the temperature sensor and the heating film and other equipment. The heating film, louvers, and sensors inside the module are "plug and play" via aviation plugs. The DCS system automatically identifies the module ID and loads the corresponding control parameters. During disassembly and assembly, the DCS system monitors the module connection status in real time (via the contact signals of the aviation plugs). When the module is detected to be separated, the power supply to the heating film in that area is automatically cut off to avoid the risk of electric shock.

[0050] This embodiment constructs a modular enclosure system that can be assembled and disassembled by a single person within 30 minutes through functional module division, magnetic and sliding rail combined locking, and lightweight design (single module ≤15kg). This embodiment not only ensures thermal insulation performance (heat leakage rate ≤1.5%) and structural strength, but also achieves rapid deployment and maintenance through standardized interfaces, realizing convenient maintenance. The modular design reduces maintenance time by 70%.

[0051] Example 3:

[0052] In the aforementioned embodiments, the temperature detection mechanism installed in the inner layer 5 of the insulation cover module 1 includes a flexible thin-film temperature sensor, a fiber Bragg grating (FBG) sensor, an infrared array sensor, a thermocouple, or a resistance temperature detector (RTD) sensor; any of the above can be selected as the temperature sensor installed on the inner layer 5 for temperature monitoring. Furthermore, a composite sensor module can be added, including a humidity sensor and a pH sensor. The humidity sensor has a detection range of 0~100% RH and an accuracy of ±3%. The pH sensor is used to detect whether there is any leakage of alkaline solution in the electrolytic cell. At locations prone to leakage, such as the bottom edge of the insulation cover and module seams, a pH sensor can be installed every 500mm, with the sensor probe extending 2mm beyond the outer surface of the insulation cover to directly contact any potentially leaking alkaline solution.

[0053] Furthermore, the temperature monitoring mechanism 6 includes a curved frame 12 adapted to the curved shape of the electrolytic cell surface. The curved frame 12 has a mounting slot for embedding a temperature sensor on the side facing the electrolytic cell. The multi-point array-covered temperature monitoring mechanism 6 formed in Embodiment 1 is divided into each corresponding insulation cover module, forming a modular assembly of the temperature monitoring mechanism 6. The modules are electrically connected via aviation connectors, thus forming a modular temperature monitoring mechanism 6. To accommodate the detachable design of the insulation cover module 1, a curved frame 12 is added to its inner layer 5, such as... Figure 5 As shown, since it is pre-set to match the curved shape of the electrolytic cell surface, it can form a fit with the shape of the electrolytic cell surface when installed in place, and maintain a close fit as much as possible to facilitate temperature measurement.

[0054] Furthermore, the curved frame 12 features a mesh structure design, which can cooperate with the outer layer 3 to clamp and fix the middle layer 4 and inner layer 5. The inner layer 5, in particular, is made of flexible aluminum silicate fiber, which is relatively soft. The mesh structure of the curved frame 12 positions it, preventing displacement or detachment during movement. A groove of a certain depth is formed on the inner side of the curved frame 12 for embedding the temperature sensor. The contact thermal resistance of the groove surface is optimized. Specifically, the thermal conductivity optimization interface includes graphene thermal conductive gel and high-temperature pressure-sensitive tape. Graphene thermal conductive gel can be used to fill the groove and cover the inner surface of the curved frame 12, thereby eliminating the thermal resistance caused by the curved surface gaps and ensuring a sensor response time of <3s. The high-temperature pressure-sensitive tape is mainly used to fix the embedded temperature sensor and prevent it from falling off during long-term vibration.

[0055] Example 4:

[0056] As shown in Embodiment 3, the temperature monitoring mechanism 6 is divided into regions and integrated with the modules of each insulation cover 1, so that the temperature monitoring mechanism 6 forms a segmented temperature sensor array 14 with the insulation cover 1 modules as units; the insulation cover 1 modules form arc-shaped segmented modules, and the segmented modules are connected to form a ring-shaped mesh multi-point temperature monitoring array surrounding and adhering to the electrolytic cell. This distinguishes it from the temperature monitoring mechanism 6 in Embodiment 1, which can be understood as a whole temperature monitoring mechanism 6. In this embodiment, it is divided into regions and combined with modules to form a design that is easy to disassemble and replace.

[0057] Furthermore, in Embodiment 1, an electric louver 10 is provided. This louver is used to accelerate airflow on the surface of the electrolytic cell when the surface temperature is high, thereby speeding up heat dissipation, preventing heat accumulation, and avoiding excessively high temperatures in the electrolytic cell. The purpose of the electric louver 10 is to balance heat dissipation and heat preservation requirements. However, in Embodiment 1, the inner layer 5 is fixedly attached to the surface of the electrolytic cell. The attached flexible aluminum silicate fiber layer restricts the airflow and velocity on the surface of the electrolytic cell, resulting in a slower temperature drop and poor heat dissipation balancing effect.

[0058] As an improvement, in this embodiment, an adjustable air gap 15 is provided between the inner layer 5 of the insulation cover 1 and the surface of the electrolytic cell; such as Figure 5 , 6As shown, the air gap spacing 15 is adjusted by an actively or passively driven air gap support unit 16; several air gap support units 16 are evenly distributed within each insulation cover module 1. In actual use, when the surface temperature of the electrolytic cell is within a preset temperature range, the inner layer 5 is in contact with the surface of the electrolytic cell, and at this time, the air gap spacing 15 can be considered 0. When the temperature monitoring mechanism 6 detects that the electrolytic cell is overheating, the air gap support unit 16 supports the inner layer 5, thereby expanding the air gap and causing the inner layer 5 to move away from the surface of the electrolytic cell. This enhances the airflow between the surface of the electrolytic cell and the inner layer 5, thus quickly controlling the temperature of the electrolytic cell and preventing it from overheating.

[0059] Specifically, the heat insulation cover module 1 includes a double-layered outer layer 3, which includes a fixed outer shell 22 and a movable outer shell 23. The fixed outer shell 22 is sleeved on the outside of the movable outer shell 23. An air gap support unit 16 is provided between the fixed outer shell 22 and the movable outer shell 23. The fixed outer shell 22 and the electrolytic cell are relatively fixed in position. The movable outer shell 23 is provided with a middle layer 4 and an inner layer 5 in sequence on the side near the electrolytic cell. The fixed outer shell 22 is provided with lateral ventilation holes 24 around its perimeter near the electrolytic cell that match the air gap spacing 15. Based on the aforementioned Embodiment 2, in this embodiment, a T-slot 28 is provided on the fixed outer shell 22, so that the fixed outer shell 22 is connected to the sliding key 27 through the T-slot 28. Magnets 26 for connecting modules are also provided on the side of the fixed outer shell 22, so that the modules in this embodiment are the same as those in Embodiment 2, and can be easily installed and disassembled. The difference is that a movable outer shell 23 is added in this embodiment, and the distance between the two is controlled by the air gap support unit 16 between them, so as to push the middle layer 4 and the inner layer 5 closer to or away from the electrolytic cell to form an air gap distance 15. Specifically, at least four air gap support units 16 are distributed between the plates of the fixed outer shell 22 and the movable outer shell 23. The movable outer shell 23, the middle layer 4, and the inner layer 5 form a whole. Several air gap support units 16 work synchronously to control the relative movement of the movable outer shell 23, the middle layer 4, and the inner layer 5, thereby controlling the air gap distance 15.

[0060] It is understandable that the air gap support unit 16 can be actively formed and controlled, for example, by using an electric telescopic rod as the air gap support unit 16 for installation. Its advantage is that it is easy to control, but its installation cost is high and its subsequent maintenance is more complicated.

[0061] As one embodiment, a passive driving method can be adopted. Specifically, the air gap support unit 16 includes a cavity 17, a drive rod 18, a phase change material 19, and an elastic element 20. The cavity 17 is provided with a drive rod 18 that can be adjusted to move along its axial direction. One end of the drive rod 18 extends out of the cavity 17. The elastic element 20 and the phase change material 19 are provided inside the cavity 17. A piston 21 is provided at one end of the drive rod 18 placed inside the cavity 17. In this embodiment, the cavity 17 can be a fixed cylindrical cavity 17, with the end near the fixed outer shell 22 being a closed end and the other end being open. At the opening end, a drive rod 18 extends out. A piston 21 is installed within the cavity 17, and the piston 21 moves along the axis within the cavity 17. The piston 21 divides the cavity 17 into an elastic reset chamber and a phase change chamber. An elastic element 20 is installed in the elastic reset chamber, and a phase change material 19 is installed in the phase change chamber. The extension amount of the drive rod 18 is controlled by the combined force of the elastic element 20 and the phase change material 19 acting on the piston 21. The elastic element 20 can be a spring, located near the fixed housing 22, while the phase change material 19 is located near the movable housing 23. Figure 6 As shown, a radial cylindrical groove 29 is provided on the movable outer shell 23. The cylindrical groove 29 provides installation space for the air gap support unit 16, and the bottom of the cylindrical groove 29 is closer to the electrolytic cell body 2. As an improvement, the cylindrical groove 29 can also extend through the middle layer 4 and the inner layer 5 and be exposed on the inner surface of the inner layer 5. A heat transfer pad with shock absorption and heat conduction function is provided on the contact surface between the cylindrical groove 29 and the electrolytic cell body 2, so that the temperature change of the cylindrical groove 29 is closer to that of the electrolytic cell body 2, thereby making the phase change material 19 inside it more sensitive to the temperature change of the electrolytic cell.

[0062] The phase change material 19 can be a paraffin-based phase change material 19 (PCM, melting point 55°C).

[0063] Low temperature stage (<55℃): The phase change material 19 is solid. During the process of decreasing from high temperature, the phase change material 19 gradually changes from liquid to solid. During this process, under the push of the spring, the piston 21 is gradually pushed closer to the electrolytic cell side, thereby gradually reducing the air gap 15 and sticking to the surface of the electrolytic cell. The air layer remains still to form the same heat insulation structure as in Example 2.

[0064] High temperature stage (>55℃): The phase change material 19 melts and expands (expansion rate 15%), pushing the piston 21 away from the electrolytic cell, thereby moving the middle layer 4, inner layer 5, and moving outer shell 23 away from the surface of the electrolytic cell, forming an air gap of about 3mm 15. The airflow can then flow through the surface of the electrolytic cell and work in conjunction with the louvers to dissipate heat, thereby improving heat dissipation efficiency.

[0065] It is understandable that the phase change temperature of the phase change material 19 varies depending on the different material layers. Therefore, the corresponding phase change material 19 can be selected according to the ideal temperature range so that the air gap support unit 16 can undergo phase change within the preset temperature range, thereby controlling the extension and retraction of the drive rod 18.

[0066] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A thermal management and temperature control cover for an electrolytic cell, characterized in that, The device includes a multi-layer composite structure for insulation, with the surface of the electrolytic cell covered by the insulation cover. The insulation cover includes at least an outer layer, a middle layer, and an inner layer. The outer layer is a solid shell, the middle layer is a heat-insulating filling layer, and the inner layer is a laminated insulation layer. The insulation cover is equipped with a multi-point array temperature monitoring mechanism for monitoring the temperature of the electrolytic cell.

2. The temperature control cover for thermal management of an electrolytic cell according to claim 1, characterized in that, The insulation cover is a modular quick-release structure, which includes a top cover module, a side panel module, and an end panel module. The top cover module is equipped with an adjustable electric louver.

3. The temperature control cover for thermal management of an electrolytic cell according to claim 1, characterized in that, The inner side of the heat insulation cover is also provided with an electric heating film layer.

4. The temperature control cover for thermal management of an electrolytic cell according to claim 1 or 2, characterized in that, The temperature detection mechanism includes a flexible thin-film temperature sensor, a fiber Bragg grating (FBG) sensor, an infrared array sensor, a thermocouple or a resistance temperature detector (RTD) sensor; it also includes a composite sensor module, which includes a humidity sensor and a pH sensor.

5. The temperature control cover for thermal management of an electrolytic cell according to claim 2, characterized in that, The temperature monitoring mechanism includes a curved frame adapted to the curved shape of the electrolytic cell surface. The curved frame has a mounting groove for embedding and installing a temperature sensor on the side facing the electrolytic cell. The surface of the mounting groove has a heat conduction optimization interface for encapsulating the temperature sensor therein.

6. The temperature control cover for thermal management of an electrolytic cell according to claim 5, characterized in that, The temperature monitoring mechanism forms a segmented temperature sensor array with the heat insulation cover module as the unit; The heat insulation cover module forms an arc-shaped segmented module, and the segments are connected to form a ring-shaped mesh multi-point temperature monitoring array that surrounds and adheres to the electrolytic cell.

7. The temperature control cover for thermal management of an electrolytic cell according to claim 6, characterized in that, An adjustable air gap is provided between the inner layer of the insulation cover and the surface of the electrolytic cell; the air gap is adjusted by an actively or passively driven air gap support unit; several air gap support units are evenly distributed in each insulation cover module.

8. The temperature control cover for thermal management of an electrolytic cell according to claim 7, characterized in that, The air gap support unit includes a cavity, a drive rod, a phase change material, and an elastic element. The cavity is equipped with a drive rod that can be adjusted along its axial direction. One end of the drive rod extends out of the cavity. The cavity is equipped with an elastic element and a phase change material. A piston is located at one end of the drive rod inside the cavity. The piston divides the cavity into an elastic reset chamber and a phase change chamber. The elastic reset chamber is equipped with an elastic element, and the phase change chamber is equipped with a phase change material. The extension amount of the drive rod is controlled by the resultant force of the elastic element and the phase change material acting on the piston.

9. The temperature control cover for thermal management of an electrolytic cell according to claim 7, characterized in that, The heat insulation cover module includes a double-layered outer layer, which includes a fixed outer shell and a movable outer shell. The fixed outer shell is fitted over the outside of the movable outer shell. An air gap support unit is provided between the fixed outer shell and the movable outer shell. The fixed outer shell and the electrolytic cell are positioned relatively fixedly. The movable outer shell is provided with a middle layer and an inner layer in sequence on the side near the electrolytic cell. The fixed outer shell is provided with lateral ventilation holes around its perimeter near the electrolytic cell that match the air gap spacing.

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