Thermal management temperature control cover body of electrolytic bath

Abstract

The invention discloses an electrolytic bath thermal management temperature control cover body which comprises a heat preservation cover body of a multi-layer composite structure, the surface of an electrolytic bath is wrapped 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 an attached 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] The present invention relates to the technical field of electrolytic cells, and in particular to a thermal management and temperature control cover for an electrolytic cell. Background Art

[0002] In the field of green hydrogen production, the thermal management of electrolyzers has always been a key problem affecting the efficiency and cost of hydrogen production. Traditional insulation systems mostly use single rock wool or polyurethane foam materials. These materials not only have high thermal conductivity, but are also easily affected by moisture and aged after long-term use, resulting in a significant decrease in thermal insulation performance. For example, in a low-temperature environment, a large amount of heat on the surface of the electrolyzer will be lost through the material itself and structural gaps, with a heat loss rate of up to 20% to 30%, which significantly increases the cost of green hydrogen production. Moreover, problems such as the direct contact between the traditional insulation structure electrolyzer and the metal frame on the surface form multiple "thermal bridges", further exacerbating heat loss, as if countless tiny channels are constantly taking away heat, resulting in serious energy waste.

[0003] Furthermore, the intermittent nature of green power sources like wind and photovoltaic power necessitates frequent starts and stops for the electrolyzers. Traditional insulation systems rely entirely on manual inspections to adjust heat dissipation and heating equipment. Operators often wait until temperature anomalies become noticeable before discovering them, and the time required to manually adjust the equipment is significant. This results in temperature fluctuations as high as ±10°C. These drastic temperature swings, like operating in a world of extremes, accelerate the aging of components like gaskets and electrodes, shortening their service life. They can also cause localized overheating and decomposition of the electrolyte, reducing hydrogen purity.

[0004] In terms of maintenance, traditional insulation covers are mostly monolithic structures, requiring complete disassembly for inspection and repair. This is not only time-consuming and labor-intensive, with a single maintenance session often taking 4-6 hours or even longer. Furthermore, if a component is damaged, the entire cover may need to be replaced, resulting in high costs. Furthermore, traditional insulation systems are independent of the electrolyzer's liquid supply and power supply systems. Temperature monitoring data can only be displayed locally and cannot be connected to the industrial control system. Fault warnings rely entirely on manual judgment, which can easily lead to missed detections, resulting in equipment failures not being discovered and addressed in a timely manner, thus affecting production continuity and stability.

[0005] Furthermore, traditional insulation materials perform poorly under harsh operating conditions such as severe corrosion and high pressure. Ordinary carbon steel or stainless steel casings lack corrosion resistance, and electrolyte vapor and salt spray environments can easily corrode and perforate the casing. Ordinary rubber sealing strips age rapidly under high pressure, and the reduced compression rate weakens the sealing performance. When external moisture penetrates the insulation layer, it not only further reduces the insulation effect but may also cause safety risks such as electrolyzer short circuits. These interrelated issues make it difficult for traditional insulation systems to meet the energy efficiency, reliability, and intelligence requirements of large-scale green hydrogen production. A more efficient, intelligent, and reliable solution is urgently needed to address these challenges.

[0006] In view of the above reasons, it is necessary to propose an electrolytic cell thermal management temperature control cover to solve the above problems. Summary of the Invention

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

[0008] To achieve the above object, the technical solution of the present invention is as follows: A thermal management and temperature control cover for an electrolytic cell comprises a thermal insulation cover with a multi-layer composite structure. The surface of the electrolytic cell is covered by the thermal insulation cover. The thermal insulation cover comprises at least an outer layer, a middle layer and an inner layer. The outer layer is a solid cover shell, the middle layer is a thermal insulation filling layer, and the inner layer is a conformable thermal insulation layer. A temperature monitoring mechanism with a multi-point array coverage for monitoring the temperature of the electrolytic cell is provided inside the thermal insulation cover.

[0009] Furthermore, the heat-insulating cover body is a modular quick-detachable structure, which includes a top cover module, a side panel module, and an end panel module. The top cover module is provided with an electric shutter with an adjustable opening.

[0010] Furthermore, the outer layer comprises a magnesium-aluminum alloy cover, and a nano-ceramic coating is provided on the surface of the outer cover; The middle layer includes a vacuum insulation panel and an aerogel composite material; The inner layer includes a flexible aluminum silicate fiber layer.

[0011] Furthermore, an electric heating film layer is provided on the inner side of the heat-insulating cover, and the electric heating film layer includes a carbon fiber heating film.

[0012] Furthermore, the temperature detection mechanism includes a flexible thin film temperature sensor, a fiber Bragg grating sensor (FBG), an infrared array sensor, a thermocouple or a thermal resistor sensor; and also includes a composite sensor module, which includes a humidity sensor and a pH sensor.

[0013] Furthermore, the temperature monitoring mechanism includes a curved frame that is adapted to the curved shape of the surface of the electrolytic cell. The curved frame is provided with an installation groove for embedding and installing a temperature sensor on the side facing the electrolytic cell. The surface of the installation groove is provided with a thermal conduction optimization interface for encapsulating the temperature sensor therein. The thermal conduction optimization interface includes graphene thermal conductive gel and high-temperature resistant pressure-sensitive tape.

[0014] Furthermore, the temperature monitoring mechanism forms a petal-type temperature sensor array with the thermal insulation cover module as a unit; the thermal insulation cover module forms an arc-shaped petal module, and the petal modules are connected to form a ring-shaped mesh multi-point temperature monitoring array surrounding and fitting around the electrolytic cell.

[0015] Furthermore, an adjustable air gap is provided between the inner layer of the thermal 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 a plurality of air gap support units are evenly distributed in each thermal insulation cover module.

[0016] Furthermore, the air gap support unit includes a cavity, a driving rod, a phase change material, and an elastic part. The cavity is provided with a driving rod that can be moved and adjusted along its axial direction. One end of the driving rod extends from the cavity. An elastic part and a phase change material are provided in the cavity. The driving rod is placed in the cavity and a piston is provided at one end. The piston divides the cavity into an elastic reset chamber and a phase change chamber. The elastic reset chamber is provided with an elastic part, and the phase change chamber is provided with a phase change material. The extension amount of the driving rod is controlled by the combined force of the elastic part and the phase change material acting on the piston.

[0017] Furthermore, the thermal insulation cover module includes a double-layer outer layer, which includes a fixed shell and a movable shell. The fixed shell is arranged on the outside of the movable shell. An air gap support unit is arranged between the fixed shell and the movable shell. The position between the fixed shell and the electrolytic cell is relatively fixed. The middle layer and the inner layer are arranged in sequence on the side of the movable shell close to the electrolytic cell. The fixed shell is provided with lateral ventilation holes matching the air gap spacing around the electrolytic cell.

[0018] The advantages and beneficial effects of the present invention are: 1. The outer magnesium-aluminum alloy shell of the electrolytic cell thermal management and temperature control cover is not only lightweight and strong, but the nano-ceramic coating on the surface can also effectively resist strong alkaline environments and salt spray corrosion, greatly extending the service life of the cover under harsh conditions; the vacuum insulation panel and aerogel composite material in the middle layer are a powerful combination. With its ultra-low thermal conductivity, it greatly reduces the heat loss rate and can also adapt to a wide temperature range environment; the flexible aluminum silicate fiber layer in the inner layer can closely fit the curved surface and complex structure of the electrolytic cell, eliminating the air thermal bridge problem that is prone to traditional insulation layers. In addition, the material is soft and can be cut, which makes it very convenient to install and can be quickly adapted to electrolytic cells of different sizes.

[0019] 2. For temperature monitoring and control, the multi-point array temperature monitoring mechanism incorporates multiple sensor types, accurately capturing local temperature changes while scanning the entire area for thermal distribution. Combined with a curved frame and efficient thermal conductivity interface materials, this system enables more timely and accurate temperature monitoring. The petal-shaped sensor array and modular housing structure complement each other, enabling comprehensive monitoring of the electrolyzer. Furthermore, maintenance requires only the removal of the corresponding modules, significantly reducing the time required to locate and resolve faults.

[0020] 3. In terms of dynamic control and energy-saving design, the zoning of the carbon fiber heating film can supplement heat only in low-temperature areas according to actual needs, avoiding energy waste. The electric blinds can dynamically adjust their opening according to temperature conditions, achieving an intelligent balance between heat dissipation and heat preservation. 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 conditions of the electrolyzer. The double-layer shell and lateral ventilation holes further enhance heat dissipation and prevent local overheating of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a thermal management and temperature control cover for an electrolytic cell according to the present invention; Figure 2 This is a cross-sectional exploded view of the electrolytic cell thermal management and temperature control cover of the present invention; Figure 3 It is a schematic diagram of the longitudinal cross-section structure of the electrolytic cell thermal management temperature control cover of the present invention; Figure 4 Schematic diagram of a surrounding multi-point temperature monitoring array network in the present invention; Figure 5 This is an exploded schematic diagram of the thermal insulation cover module of the present invention; Figure 6 It is a structural diagram of embodiment 4 of the present invention; In the figure: 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 panel module; 9. End panel module; 10. Electric blinds; 11. Electric heating film layer; 12. Curved frame; 14. Petal temperature sensor array; 15. Air gap spacing; 16. Air gap support unit; 17. Cavity; 18. Drive rod; 19. Phase change material; 20. Elastic part; 21. Piston; 22. Fixed shell; 23. Movable shell; 24. Lateral ventilation holes; 25. Circumferential array; 26. Magnet; 27. Slide key; 28. T-slot; 29. Cylindrical slot. DETAILED DESCRIPTION

[0022] The following embodiments are further described in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0023] Example 1: A heat management and temperature control cover for an electrolytic cell includes a multi-layer composite heat-insulating cover 1. The surface of the electrolytic cell is covered by the heat-insulating cover 1, which 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, as high as 20-30%, especially in a low-temperature environment below 5 degrees Celsius, which leads to increased energy loss. The heat-control cover reduces the heat loss rate from the traditional 15-20% to below 5% through the multi-layer composite heat-insulating cover 1 structure. Specifically, Figure 1 、 2 As shown, the outer layer 3 of the thermal 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. In actual use, the outer layer 3 can be designed to be made of magnesium-aluminum alloy with a thickness of 0.8-1.5 mm. The nano-ceramic coating provides protection against strong alkali and salt spray corrosion, with an alkali pH greater than 14. This effectively protects the outer layer 3 and improves the service life and stability of the thermal insulation cover 1 in harsh environments. In this embodiment, considering the electrolytic cell operating environment, strong alkali corrosion resistance, salt spray corrosion resistance, high temperature resistance, and thermal insulation are required to prevent the coating from corrosion and flaking. An oxide-based composite coating can be used: a base material of Al2O3 or ZrO2 doped with nanoparticles such as SiO2 and TiO2. Alternatively, a salt spray corrosion-resistant nano-ceramic coating can be used, such as 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.

[0024] The middle layer 4 of the thermal insulation cover 1 is an insulating filling layer. Specifically, a vacuum insulation panel and an aerogel composite material can be used. Its thermal conductivity is ≤0.02 W / (m·K), and the heat loss is reduced by 60% compared with traditional rock wool. This embodiment achieves the dual goals of "ultra-low thermal conductivity and high environmental tolerance" through the synergistic effect of the vacuum insulation panel and the aerogel composite material, and forms a modular integration solution with other components of the cover, such as the aluminum silicate fiber layer and the aluminum-magnesium alloy shell, to effectively reduce the heat loss of the electrolytic cell. The core material of the vacuum insulation panel is fumed silica or glass fiber felt with a thickness of 20-30mm, ensuring that a high-efficiency insulation structure is formed after vacuuming. The surface is covered with an aluminum foil-nylon composite barrier film with low gas permeability to prevent external air from infiltrating and destroying the vacuum environment. The internal air convection is eliminated by vacuuming (vacuum degree <10⁻²Pa), 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 panel and the aerogel can be composited in a layered stacking manner. The vacuum insulation panel (outer side) and the aerogel composite panel (inner side) are bonded by silicone adhesive (temperature resistance -60~200℃, bonding strength ≥0.5 MPa), and the total thickness is controlled at 20-40mm, forming a dual insulation structure of "high vacuum barrier and nanopore insulation".

[0025] The inner layer 5 of the heat-insulating cover 1 is laminated with a heat-insulating material. The heat-insulating 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°C and is laminated to the surface of the electrolytic cell to effectively reduce the thermal bridge effect.

[0026] Furthermore, the thermal insulation cover 1 is provided with a temperature monitoring mechanism 6 covered by a multi-point array for monitoring the temperature of the electrolytic cell. This temperature monitoring mechanism 6 is embedded in the inner wall of the thermal insulation cover, so as to monitor the surface temperature of the electrolytic cell from inside the thermal insulation cover. Its multi-point array covering structure can be expressed as a circumferential array 25 on the surface of the electrolytic cell, that is, sensors are evenly arranged around the circumference of the electrolytic cell, with a spacing of 150-200mm between adjacent nodes, covering the main curved surface of the electrolytic cell; and a roll of the circumferential array 25 is set at a certain interval on the axial length, and the number of settings is adjusted according to the length of the electrolytic cell. Thus, a circumferential multi-point temperature monitoring array network is formed, 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 the circumferential and height directions to ensure that there is no blind spot in monitoring.

[0027] Take an electrolytic cell with a length of 2000mm and a diameter of 1000mm as an example.

[0028] Circumference 3140mm ÷ spacing 200mm ≈ 16; 16-20 temperature sensors are arranged in each row around the circumference.

[0029] In the axial direction, 2000mm ÷ 500mm spacing = 4 rows; That is, if four rows are set up, the total number of monitoring points is 64-80. In actual use, technicians in this field can increase or decrease it according to the situation. This creates a coverage without blind spots. This embodiment adopts a grid layout to eliminate single-point monitoring blind spots and can capture local thermal anomalies with a diameter of ≥50mm. In this implementation, temperature data is uploaded to the DCS system in real time, using 10Hz high-frequency sampling and fast transmission to reduce the delay to ≤100ms, adapting to electrolytic cell load fluctuations and supporting DCS system zoning control. Example 2: In this embodiment, the heat preservation cover 1 is designed as a modular quick-disassembly structure, and the heat preservation cover 1 is divided into a top cover module 7, a side panel module 8, and an end panel module 9. Figure 3 、 5 As shown, the slide rails are locked with NdFeB magnets 26 (magnetic force ≥ 30 N), allowing one person to complete assembly and disassembly within 30 minutes. Fluororubber seals (compression rate 25% to 30%) are used on the edges, with a heat leakage rate of ≤2%, suitable for high-pressure (5 MPa) environments.

[0030] Specifically, the roof module 7 is composed of the following: Outer layer 3: aluminum-magnesium alloy plate (1.0mm thick), sprayed with a nano-ceramic coating (resistant to strong alkali and salt spray). Inner layer 5: aluminum silicate fiber layer (10mm thick), conforming to the top curved surface of the electrolytic cell. Middle layer: vacuum insulation panel (20mm thick) and aerogel composite panel (10mm thick). An electric blind 10, measuring 400mm x 300mm, is embedded in the center of the top layer. Its opening is controlled by DCS commands. A temperature sensor data acquisition module is built in, and the cable is connected through an aviation plug on the edge of the roof.

[0031] The side panel modules 8 are symmetrically arranged on either side of the electrolytic cell and are composed of the following: Outer layer 3: aluminum-magnesium alloy plate, 1.2mm thick, with a curvature radius consistent with the electrolytic cell, R = 500mm. Inner layer 5: flexible aluminum silicate fiber layer, 15mm thick, filling the gap between the curved surface of the electrolytic cell and the insulation layer. Middle layer: vacuum insulation panel, 25mm thick; aerogel composite panel, 15mm thick, for a total insulation layer thickness of 40mm. The inner wall is affixed with a carbon fiber heating film with a power density of 3W / cm², covering an area of 60% of the inner surface of the side panel. Zone control is implemented, and each heating film is independently powered. The end plate module 9 has an outer layer (3): an aluminum-magnesium alloy plate, 1.0mm thick, with pipe perforations ≥50mm in diameter and equipped with fluororubber seals. The inner layer (5): a removable aluminum silicate fiber mat, 20mm thick, for quick disassembly during pipeline maintenance. The middle layer: an aerogel composite panel, 20mm thick. Vacuum insulation panels are optional to avoid damage to the vacuum layer during assembly and disassembly of the end plate.

[0032] The locking structure of the slide rail and the magnet 26 is convenient for installation and removal. Specifically, a sliding key 27 is set on the surface of the electrolytic cell. Specifically, the sliding key 27 can be fixedly welded to the side edge of the plate, or it can be preset at the edge of the plate. The sliding key 27 is then fixed to the electrolytic cell in a detachable manner such as bolt connection. The cross section of the sliding key 27 is T-shaped, as shown in FIG. Figure 6 As shown, it has a slide rod portion and a slide cap portion, the slide rod portion is a short cylindrical rod and is arranged along the radial direction of the electrolytic cell, the slide cap portion is connected to the end of the slide rod portion, the slide rod portion is fixedly connected to the center of the slide cap portion, and the slide cap portion is circular as a whole, so that the cross section of the slide key 27 forms a T shape; a T-slot 28 matching the slide key 27 is provided on the edge of the outer layer 3 of the thermal insulation cover module, and the T-slot 28 forms a slide rail, and a number of neodymium iron boron magnets 26 are evenly embedded in the side edge of each module, with a size of Φ15mm×10mm, a surface magnetic field strength ≥300mT, a magnetic force of a single magnet 26 ≥30N, and a uniform magnetic pole direction to avoid magnetic force cancellation during installation; so During installation, the T-shaped sliding key 27 on the electrolytic cell is inserted into the T-slot 28, allowing the module to slide relative to the cell along the T-slot 28. This allows the two insulation housing modules 1 to be joined together. During assembly, magnets 26 on the side walls of adjacent modules attract each other, locking them in place, thus enabling quick module installation. The aviation plug of the top cover module 7 is docked with the socket of the side panel module 8 to establish electrical connectivity between the temperature sensor and the heating membrane. If multiple side panel modules 8 and top cover modules 7 are installed, the side panel modules 8 and top cover modules 7 are connected via aviation plugs to establish electrical connectivity between the temperature sensor and the heating membrane and other devices. The heating membrane, blinds, and sensors within the module are plug-and-play devices using the aviation plugs. The DCS system automatically identifies the module ID and loads the corresponding control parameters. During assembly and disassembly, the DCS system monitors the module connection status in real time (via contact signals from the aviation plugs). If it detects module separation, it automatically disconnects the power to the heating membrane in that area to prevent the risk of electric shock.

[0033] This embodiment utilizes functional modularization, combined magnetic and slide rail locking, and a lightweight design (single module ≤ 15 kg) to create a modular enclosure system that can be assembled and disassembled by a single person within 30 minutes. This embodiment ensures thermal insulation performance (heat leakage rate ≤ 1.5%) and structural strength, while also enabling rapid deployment and maintenance through standardized interfaces. This modular design reduces maintenance time by 70%.

[0034] Example 3: In the aforementioned embodiment, the temperature detection mechanism provided on the inner layer 5 of the thermal insulation cover 1 module includes a flexible thin film temperature sensor, a fiber Bragg grating sensor (FBG), an infrared array sensor, a thermocouple, or a thermistor sensor; any of the above can be selected as a temperature sensor and provided on the inner layer 5 for temperature monitoring. Furthermore, a composite sensor module can be added, comprising a humidity sensor and a pH sensor. The humidity sensor has a detection range of 0-100% RH, with an accuracy of ±3%. The pH sensor is used to detect alkali leakage in the electrolytic cell. A pH sensor can be provided every 500 mm at leak-prone locations such as the bottom edge of the thermal insulation cover and at module joints. The sensor probe extends 2 mm from the outer surface of the thermal insulation cover, directly contacting any alkali leakage.

[0035] Furthermore, the temperature monitoring mechanism 6 includes a curved frame 12 adapted to the curved shape of the surface of the electrolytic cell. The curved frame 12 is provided with a mounting groove for embedding and installing a temperature sensor on the side facing the electrolytic cell. The temperature monitoring mechanism 6 covered by the multi-point array formed in the first embodiment is divided into each corresponding module of the thermal insulation cover 1 to form a modular assembly of the temperature monitoring mechanism 6. The modules are electrically connected through aviation plugs to form a modular temperature monitoring mechanism 6. In order to cooperate with the detachable design of the thermal insulation cover 1 module, a curved frame 12 is additionally provided on its inner layer 5, such as Figure 5 As shown, since it is pre-set to a curved surface shape that matches the curved surface of the electrolytic cell, it can form a combination that matches the shape of the electrolytic cell surface when installed in place, and keep it as close as possible to facilitate temperature measurement.

[0036] Furthermore, the curved frame 12 is designed with a mesh structure, which can cooperate with the outer layer 3 to fix the middle layer 4 and the inner layer 5 in a clamping manner. In particular, the inner layer 5 is made of a flexible aluminum silicate fiber layer, which is relatively soft in texture. The mesh structure of the curved frame 12 positions it in place to prevent the inner layer 5 from shifting or detaching during movement. A groove of a certain depth is provided 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 heat conduction optimization interface includes graphene thermal conductive gel and high-temperature resistant pressure-sensitive tape. The graphene thermal conductive gel can be filled in the groove and covered on the inner surface of the curved frame 12, thereby eliminating the thermal resistance caused by the gap between the curved surfaces and reducing the sensor response time to less than 3s. The high-temperature resistant pressure-sensitive tape is mainly used to fix the embedded temperature sensor to prevent it from falling off due to long-term vibration conditions.

[0037] Example 4: According to the third embodiment, 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 petal-type temperature sensor array 14 with the insulation cover 1 module as the unit; the insulation cover 1 module forms an arc-shaped petal module, and the petal modules are connected to form a ring-shaped mesh multi-point temperature monitoring array that surrounds and fits around the electrolytic cell. This is different from the temperature monitoring mechanism 6 in the first embodiment, which can be understood as a whole temperature monitoring mechanism 6. The present embodiment divides the region and combines it with the modules to form a design that is easy to disassemble and replace.

[0038] Furthermore, in Example 1, electric blinds 10 are provided. When the surface temperature of the electrolytic cell is high, they accelerate air flow and heat dissipation on the surface of the electrolytic cell, preventing heat accumulation and overheating of the electrolytic cell. The purpose of providing electric blinds 10 is to balance heat dissipation and insulation requirements. However, in Example 1, the inner layer 5 is fixedly attached to the surface of the electrolytic cell. The attached flexible aluminum silicate fiber layer restricts the air flow and flow rate on the surface of the electrolytic cell, which in turn slows down the temperature drop of the electrolytic cell and poorly achieves balanced heat dissipation.

[0039] As an improvement, in this embodiment, an adjustable air gap 15 is provided between the inner layer 5 of the heat-insulating cover 1 and the surface of the electrolytic cell; Figure 5 、 6 As shown, the air gap spacing 15 is adjusted by an actively or passively driven air gap support unit 16; a number of air gap support units 16 are uniformly distributed within each module of the thermal insulation cover 1. The effect in actual use is that when the surface temperature of the electrolytic cell is within a preset temperature range, the inner layer 5 is in a position that is in contact with the surface of the electrolytic cell. At this time, the air gap spacing 15 can be regarded as 0. When the temperature monitoring mechanism 6 detects that the electrolytic cell is overheated, the air gap support unit 16 props up the inner layer 5, thereby expanding the air gap and moving the inner layer 5 away from the surface of the electrolytic cell. This further increases the air flow between the surface of the electrolytic cell and the inner layer 5, thereby quickly controlling the temperature of the electrolytic cell and preventing it from overheating.

[0040] Specifically, the thermal insulation cover body 1 module includes a double-layer outer layer 3, which includes a fixed shell 22 and a movable shell 23. The fixed shell 22 is arranged on the outside of the movable shell 23. An air gap support unit 16 is arranged between the fixed shell 22 and the movable shell 23. The position between the fixed shell 22 and the electrolytic cell is relatively fixed. The middle layer 4 and the inner layer 5 are arranged in sequence on the side of the movable shell 23 close to the electrolytic cell. The fixed shell 22 is provided with lateral ventilation holes 24 that match the air gap spacing 15 near the electrolytic cell. Based on the aforementioned embodiment 2, in this embodiment, a T-slot 28 is provided on the fixed shell 22, so that the fixed shell 22 is connected to the sliding key 27 through the T-slot 28, and a magnet 26 connecting the modules is also provided on the side of the fixed shell 22, so that the modules in this embodiment are also the same as those in embodiment 2, and can be easily installed and disassembled; the difference is that in this embodiment, a movable shell 23 is additionally provided, and the distance between the two is controlled by the air gap support unit 16 between the two, so that the middle layer 4 and the inner layer 5 are pushed close to the electrolytic cell 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 shell 22 and the movable shell 23, and the movable shell 23 forms a whole with the middle layer 4 and the inner layer 5, and several air gap support units 16 act synchronously to control the relative movement of the movable shell 23, the middle layer 4 and the inner layer 5 to control the air gap distance 15.

[0041] It is understandable that the air gap support unit 16 can be actively formed and controlled, for example, an electric telescopic rod is used 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.

[0042] As an embodiment, a passive drive mode 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 member 20. The cavity 17 is provided with a drive rod 18 that is movable and adjusted along its axial direction. One end of the drive rod 18 extends from the cavity 17. The elastic member 20 and the phase change material 19 are provided in the cavity 17. The drive rod 18 is placed in the cavity 17 and a piston 21 is provided at one end. The cavity 17 in this embodiment can be a fixed cylindrical cavity 17, the end of which is close to the fixed shell 22 is a closed end, and the other end is open. The opening end of the drive rod 18 extends from the opening end. The drive rod 18 is provided with a piston 21 in the cavity 17. The piston 21 moves along the axis in the cavity 17. The piston 21 divides the cavity 17 into an elastic reset cavity and a phase change cavity. An elastic member 20 is provided in the elastic reset cavity and a phase change material 19 is provided in the phase change cavity. The extension amount of the drive rod 18 is controlled by the combined force of the elastic member 20 and the phase change material 19 acting on the piston 21; the elastic member 20 can be a spring, which is provided on the side close to the fixed housing 22, and the phase change material 19 is provided on the side close to the movable housing 23; Figure 6As shown, a radial cylindrical groove 29 is provided on the movable shell 23, and the cylindrical groove 29 provides an 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 pass through the middle layer 4 and the inner layer 5 and be exposed on the inner surface of the inner layer 5, and a heat transfer pad with shock absorption and heat conduction functions 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 the electrolytic cell body 2, and the phase change material 19 inside it can be more sensitive to the corresponding temperature change of the electrolytic cell.

[0043] The phase change material 19 may be a paraffin-based phase change material 19 (PCM, melting point 55°C); Low temperature stage (<55°C): The phase change material 19 is in solid state. During the process of decreasing from high temperature, the phase change material 19 gradually changes from liquid to solid state. During this process, the piston 21 is gradually pushed toward the side of the electrolytic cell by the spring, thereby gradually reducing the air gap 15 and sticking to the surface of the electrolytic cell. The air layer is still to form the same insulation structure as in Example 2.

[0044] High temperature stage (>55℃): The phase change material 19 melts and expands in volume (expansion rate 15%), pushing the piston 21 to move away from the electrolytic cell, thereby moving the middle layer 4, the inner layer 5, and the movable outer shell 23 away from the surface of the electrolytic cell as a whole, forming an air gap 15 of about 3 mm. The air flow can flow through the surface of the electrolytic cell and work together with the louvers to dissipate heat, thereby improving the heat dissipation efficiency.

[0045] It can be understood that the phase change temperature of the phase change material 19 has different temperature ranges depending on the different material layers, so the corresponding phase change material 19 can be selected according to the ideal temperature range to make the air gap support unit 16 undergo phase change within the preset temperature range, thereby controlling the extension and retraction of the drive rod 18.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

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

2. The electrolytic cell thermal management and temperature control cover according to claim 1, characterized in that: The heat-insulating cover body is a modular quick-detachable structure, which includes a top cover module, a side panel module, and an end panel module. The top cover module is provided with an electric shutter with an adjustable opening.

3. The electrolytic cell thermal management and temperature control cover according to claim 1, characterized in that: The outer layer comprises a magnesium-aluminum alloy cover, and a nano-ceramic coating is provided on the surface of the outer cover; The middle layer includes a vacuum insulation panel and an aerogel composite material; The inner layer includes a flexible aluminum silicate fiber layer.

4. The electrolytic cell thermal management and temperature control cover according to claim 1, characterized in that: An electric heating film layer is further provided on the inner side of the heat-insulating cover, and the electric heating film layer includes a carbon fiber heating film.

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

6. The electrolytic cell thermal management and temperature control cover 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 is provided with an installation groove for embedding and installing a temperature sensor on the side facing the electrolytic cell. The surface of the installation groove is provided with a heat conduction optimization interface for encapsulating the temperature sensor therein.

7. The electrolytic cell thermal management and temperature control cover according to claim 6, characterized in that: The temperature monitoring mechanism forms a petal-type temperature sensor array with the heat-insulating cover module as a unit; The heat-insulating cover module forms an arc-shaped petal module, and the petal modules are connected to form an annular mesh multi-point temperature monitoring array surrounding and fitting around the electrolytic cell.

8. The electrolytic cell thermal management and temperature control cover according to claim 7, characterized in that: An adjustable air gap is provided between the inner layer of the thermal 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 a plurality of air gap support units are evenly distributed in each thermal insulation cover module.

9. The electrolytic cell thermal management and temperature control cover according to claim 8, characterized in that: The air gap support unit includes a cavity, a driving rod, a phase change material, and an elastic member. The cavity is provided with a driving rod that can be moved and adjusted along its axial direction. One end of the driving rod extends out of the cavity. The cavity is provided with an elastic member and a phase change material. The driving rod is placed in the cavity and a piston is provided at one end. The piston divides the cavity into an elastic reset chamber and a phase change chamber. The elastic reset chamber is provided with an elastic member, and the phase change chamber is provided with a phase change material. The extension amount of the driving rod is controlled by the combined force of the elastic member and the phase change material acting on the piston.

10. The electrolytic cell thermal management and temperature control cover according to claim 8, characterized in that: The thermal insulation cover module includes a double-layer outer layer, which includes a fixed outer shell and a movable outer shell. The fixed outer shell is sleeved on the outside of the movable outer shell. An air gap support unit is arranged between the fixed outer shell and the movable outer shell. The position between the fixed outer shell and the electrolytic cell is relatively fixed. The middle layer and the inner layer are arranged in sequence on the side of the movable outer shell close to the electrolytic cell. The fixed outer shell is provided with lateral ventilation holes matching the air gap spacing near the electrolytic cell on all sides.

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