High-voltage hybrid electrochemical energy storage capacitor and large-scale mass production manufacturing method thereof

Abstract

The invention discloses a high-voltage hybrid electrochemical energy storage capacitor and a large-scale mass production manufacturing method thereof, and belongs to the technical field of electrochemical energy storage. The capacitor comprises a plurality of groups of electrode units connected in series, the electrode units take composite copper-aluminum current collecting foil as a base material, the surface of each electrode unit is provided with a carbon nano anchoring layer, an activated carbon positive electrode layer and a hard carbon negative electrode layer, a cellulose insulating diaphragm is arranged between the adjacent electrode units, and a flexible heat-conducting insulating layer is sprayed on an insulating marginal area. And a packaging shell, a pressure triggering type exhaust structure and a current collecting extraction electrode are arranged, and the rated working voltage is not lower than 800V. The manufacturing method comprises the steps of base material leveling, carbon nano anchoring layer coating, electrode carbon layer localized coating, electrode slice lossless transfer positioning, gradient vacuum nitrogen replacement, insulating layer vacuum spraying, curing packaging and the like. According to the invention, scarce materials such as lithium, cobalt and nickel are not needed, the cost is low, the cycle life is long, the thermal runaway risk is avoided, large-scale stable production can be realized by adopting a lossless transfer process, and the method is suitable for high-voltage energy storage scenes of 800V and above, and has excellent industrial popularization value.

Description

Technical Field

[0001] This invention belongs to the field of electrochemical energy storage device and industrial manufacturing technology, specifically involving a hybrid electrochemical energy storage capacitor adapted to high voltage scenarios of 800V and above, and a matching non-destructive manufacturing method that can be mass-produced. Background Technology

[0002] In existing electrochemical energy storage systems, lithium iron phosphate batteries suffer from problems such as short cycle life (3000-6000 cycles), large fluctuations in lithium resource prices, high total life cycle costs, and the risk of thermal runaway. While sodium-ion batteries have reduced material costs, they still have drawbacks such as limited cycle life (5000-10000 cycles), high costs of hard carbon anodes, and insufficient low-temperature performance. In scenarios such as grid-area energy storage, industrial high-voltage backup, and new energy infrastructure, existing battery solutions require extensive low-voltage series and parallel connections, along with complex BMS, step-up transformers, and fire suppression systems. The initial investment and maintenance costs are extremely high, making large-scale adoption difficult.

[0003] While existing double-layer supercapacitors offer high power density, long cycle life, and excellent safety performance, their energy density is extremely low, failing to meet the demands of high-voltage, high-capacity, long-duration energy storage scenarios. Existing hybrid energy storage capacitors are mostly small button-type structures with low single-cell withstand voltage, making them unsuitable for industrial-grade high-voltage scenarios above 800V. Furthermore, electrode manufacturing processes commonly suffer from issues such as current collector deformation, coating peeling, and insulation contamination, resulting in low mass production yields and high manufacturing costs. Simultaneously, existing high-voltage energy storage devices generally exhibit defects such as easy electrolyte decomposition under high pressure, high leakage risk, and uneven interlayer voltage leading to breakdown, severely hindering the industrial application of high-voltage hybrid energy storage devices.

[0004] Meanwhile, in large-scale energy storage scenarios such as grid connection of new energy sources, wind / solar power support in remote areas, backup power for big data data centers, and energy storage in power grid areas, existing lithium / sodium battery solutions not only suffer from high costs, short lifespans, and significant safety risks, but also have stringent requirements for installation sites and temperature control and fire protection facilities. In remote, unsupported, and space-constrained scenarios with low costs, large-scale adoption is difficult. Existing supercapacitor solutions, on the other hand, suffer from low energy density and extremely high costs for large-capacity expansion, making them unable to meet long-term energy storage needs and severely restricting the development and advancement of the new energy industry and new power systems. Summary of the Invention

[0005] 1. Purpose of the invention

[0006] To address the aforementioned shortcomings of existing technologies, this invention aims to provide a high-voltage hybrid electrochemical energy storage capacitor that is free of scarce resources such as lithium, cobalt, and nickel, has low cost, strong high-voltage adaptability, long cycle life, and is safe without the risk of thermal runaway. Simultaneously, it provides a manufacturing method that enables non-destructive electrode transfer, coating non-damage, high mass production yield, and is suitable for large-scale continuous production, thus solving the pain points of high cost, high manufacturing difficulty, poor mass production stability, and insufficient high-voltage operation reliability of existing high-voltage energy storage devices.

[0007] 2. Core Technology Solution

[0008] (1) Product technical solution

[0009] A high-voltage hybrid electrochemical energy storage capacitor includes at least two sets of electrode units arranged in series, wherein the electrode units include:

[0010] Composite copper-aluminum current collector foil serves as both the electrode substrate and the current collector structure.

[0011] A carbon nanotube anchoring layer is continuously and fully coated on one or both sides of the composite copper-aluminum current collector foil to enhance the bonding force between the electrode layer and the current collector and reduce the interfacial contact resistance.

[0012] The electrode carbon layer is precisely localized and coated on the outside of the carbon nano-anchoring layer. One side of the composite copper-aluminum current collector foil is an activated carbon positive electrode layer, and the other side is a hard carbon negative electrode layer. An insulating edge area is reserved around the electrode carbon layer.

[0013] An insulating diaphragm is disposed between adjacent electrode units for physical isolation of positive and negative electrodes and ion conduction.

[0014] A flexible thermally conductive insulating layer is disposed in the insulating edge area and interlayer gap of the electrode unit for high voltage insulation and heat conduction;

[0015] The enclosure is used to seal and house all electrode units and insulation structures.

[0016] A pressure-triggered venting structure is located at the end of the encapsulation housing and is used to automatically release pressure when there is internal overpressure.

[0017] The current collector leads are located at the end of the electrode unit and are respectively connected to the composite copper-aluminum current collector foil for external high-voltage circuit wiring.

[0018] The encapsulation shell is filled with a special organic electrolyte for dual carbon electrodes. The electrolyte wets the carbon layer of the electrodes and the insulating membrane, ensuring ion conduction and energy storage performance.

[0019] The rated operating voltage of the energy storage capacitor is ≥800V. The number of electrode units connected in series can be flexibly increased or decreased according to the target operating voltage. The number of series layers is 50~380, which can be adapted to different high voltage scenarios of 800V, 1200V, 1500V and above.

[0020] Furthermore, the carbon nano-anchoring layer is a carbon nanotube or graphene oxide layer with a thickness of 50~100nm. It has no insulating barrier and can significantly improve the bonding force between the electrode carbon layer and the current collector, avoiding coating peeling and powder shedding during charging and discharging.

[0021] Furthermore, the thickness of the electrode carbon layer is 80~120μm, and the width of the insulating edge area is 1.5~3mm; the flexible thermally conductive insulating layer is a boron nitride modified flexible epoxy layer with a thickness of 50~80μm, which can fully encapsulate the electrode edge and the current collector end, eliminating the risk of high voltage creep and tip discharge.

[0022] Furthermore, the insulating diaphragm is a porous polymer diaphragm, cellulose diaphragm, or ceramic-coated diaphragm with a thickness of 15–30 μm, penetrating between electrode units and extending to the insulating edge area to ensure the reliability of interlayer insulation.

[0023] Furthermore, the pressure-triggered venting structure is a normally closed flexible check valve with an opening pressure of 0.03~0.08MPa. The mounting seat of the check valve is a comb-tooth type or a perforated plate type structure. It is completely sealed under normal conditions and only releases a small amount of gas when there is internal overpressure. After depressurization, it immediately resets and seals. Combined with the adsorption-type liquid injection process, the risk of electrolyte leakage is completely eliminated from the structure.

[0024] Furthermore, the current collector lead-out electrode is a copper-aluminum composite conductive electrode ear, which is ultrasonically welded to the copper layer and aluminum layer of the composite copper-aluminum current collector foil, respectively, and led out to the outside of the packaging shell to realize multi-unit series high voltage output.

[0025] Furthermore, the organic electrolyte for dual-carbon electrodes is a tetraethylammonium tetrafluoroborate / propylene carbonate system with a single electrode unit withstand voltage ≥3.5V, or a high-voltage organic electrolyte with a single electrode unit withstand voltage ≥16V; it can be flexibly selected according to the number of series layers to adapt to different high-voltage scenarios. The electrolyte is stable and does not decompose or produce gas within the working voltage range.

[0026] (2) Method and technical solution

[0027] A method for mass production of the above-mentioned high-voltage hybrid electrochemical energy storage capacitor includes the following steps:

[0028] S1 Substrate Pretreatment: The composite copper-aluminum current collector foil is subjected to constant tension double-roller leveling and stress relief treatment to eliminate the internal stress of substrate rolling, ensure that the flatness error of the substrate is ≤0.05mm / m, and avoid deformation and wrinkles in the subsequent coating and stacking process.

[0029] S2 Anchoring Layer Coating: On the carbon side of the composite copper-aluminum current collector foil, carbon nanoparticle dispersion is continuously sprayed in a full-width atomized manner and dried at a low temperature of 35~45℃ with a gentle breeze to form a continuous and uniform carbon nanoparticle anchoring layer with a thickness of 50~100nm.

[0030] S3 Electrode Layer Coating: On the outside of the carbon nano-anchor layer, a localized coating process with fixed edge is used to prepare the electrode carbon layer, controlling the uniformity of the carbon layer's shape and thickness. The carbon layer is then dried and shaped in three stages at low temperature to avoid warping and deformation of the current collector caused by single-sided drying.

[0031] S4 Non-destructive transfer and positioning: It adopts two sets of interlocking support tooth mechanisms to support only the insulating edge area of ​​the electrode sheet, and performs synchronous non-destructive transfer and precise positioning of the coated electrode sheet and insulating diaphragm. It does not contact the electrode carbon layer throughout the process, eliminating coating damage, powdering, and deformation problems.

[0032] S5 Atmosphere Replacement: The arranged electrode assembly is placed into a sealed cavity, and gradient vacuum extraction and multiple slow-fill replacements with dry nitrogen are performed to achieve an oxygen-free, low-dew-point protective atmosphere. The nitrogen can be recycled and reused, reducing manufacturing costs.

[0033] S6 Insulation layer forming: Under a nitrogen protective atmosphere, flexible thermally conductive insulating material is vacuum sprayed onto the insulation edge area and interlayer gap of the electrode unit to form a continuous and uniform insulation layer, achieving full encapsulation insulation of the electrode edge.

[0034] S7 Curing and Encapsulation: After spraying, the pressure is slowly released and cured at low temperature. Then, the current collector electrode and the composite copper-aluminum current collector foil are ultrasonically welded together and installed into the encapsulation shell. In a low dew point vacuum environment, a special organic electrolyte for dual carbon electrodes is injected. A vacuum impregnation process is used to ensure that the electrolyte is completely adsorbed into the pores of the electrode carbon layer and the insulating membrane. After the electrolyte injection is completed, the encapsulation shell is laser welded and sealed. Finally, a pressure-triggered venting structure is assembled, and the finished product is completed after airtightness testing.

[0035] Furthermore, in step S2, the carbon nanotube dispersion is an aqueous carbon nanotube dispersion with a solid content of 0.3%~0.8% and a drying temperature of 35~45℃ to avoid substrate deformation caused by high temperature.

[0036] Furthermore, in step S3, the localized coating process uses a comma-shaped doctor blade to coat the coating, with the width of the guard edge matching the width of the insulation margin area to ensure that the coating edge is neat and burr-free; the temperature zones of the three-stage gradient low-temperature drying are 35~45℃, 55~65℃, and 70~80℃ respectively, to achieve slow solvent evaporation and avoid current collector deformation and coating peeling caused by coating shrinkage.

[0037] Further, in step S4, the specific steps of the non-destructive transfer positioning are as follows: the first supporting tooth mechanism supports the insulating edge area of ​​the electrode sheet and the diaphragm and moves it horizontally to the top of the stacking station; the second supporting tooth mechanism is staggered into the gap of the first supporting tooth mechanism and is raised 0.8~1.2mm to smoothly receive the electrode sheet; after the two sets of supporting tooth mechanisms are aligned, the first supporting tooth mechanism is horizontally withdrawn, and the electrode sheet is transferred to the second supporting tooth mechanism without impact; after calibration by the side positioning baffle, the positioning error is ≤±0.1mm, the second supporting tooth mechanism descends, and the electrode sheet falls smoothly to the preset position, completing the arrangement of one layer of electrode sheets.

[0038] Furthermore, in step S5, the gradient vacuum extraction rate is 0.01~0.02MPa / min, and the final vacuum degree is -0.06~-0.09MPa; nitrogen slow-fill replacement is repeated 2~3 times, and the final oxygen content in the chamber is ≤50ppm, and the dew point is ≤-40℃, so as to prevent oxygen and moisture from contaminating the electrolyte and electrodes.

[0039] Furthermore, in step S7, the rate of gradual pressure release is 0.008~0.015MPa / min to avoid deformation of the current collector and air bubble entrapment caused by sudden pressure changes; the low-temperature curing temperature is 55~65℃ and the curing time is 90~150min to ensure that the insulation layer is completely cured and free from stress deformation.

[0040] 3. Beneficial effects of the invention

[0041] 1. Controllable material costs and no reliance on scarce resources: This invention uses composite copper-aluminum metal foil as the current collector substrate, combined with carbon-based electrode materials and conventional chemical insulating materials. It does not require scarce and expensive electrochemical materials such as lithium, cobalt, and nickel. The raw materials are all industrially available and commonly used materials with wide sources and stable procurement costs. This significantly reduces the overall production cost of the device from the source. Compared with existing lithium battery / sodium battery solutions, the initial material cost can be reduced by 30% to 50%.

[0042] 2. Strong high-voltage adaptability and high modularity: This invention can flexibly adapt to different high-voltage energy storage scenarios of 800V, 1200V, 1500V and above by increasing or decreasing the number of electrode units connected in series. With electrolytes of different withstand voltage levels, it can achieve direct high-voltage connection without the need for a large number of low-voltage series and parallel connections and step-up transformers, which greatly reduces the system integration cost and perfectly adapts to the needs of grid area energy storage, industrial high-voltage backup, new energy supporting scenarios.

[0043] 3. Adaptable to large-scale mass production with high yield: This invention adopts an interlaced support non-destructive transfer and positioning process, which solves the problems of deformation, powder shedding, misalignment, and coating damage during the transfer of large-size thin electrode sheets. Combined with gradient vacuum nitrogen circulation reuse, localized coating, and flexible insulating spraying processes, the process steps are simple, requiring no complex high-precision processing equipment. The mass production yield can reach over 98%, enabling continuous, large-scale mass production and significantly reducing unit manufacturing costs.

[0044] 4. Stable high-voltage operation with no risk of leakage: This invention adopts a series pressure equalization structure, and the working voltage of a single electrode unit is far lower than the upper limit of the electrolyte's stable withstand voltage, eliminating the problems of electrolyte decomposition and gas generation under high pressure; combined with a normally closed one-way venting structure and a vacuum adsorption liquid injection process, it is completely sealed under normal conditions, and only vents when overpressure occurs, with no free-flowing liquid accumulation, thus completely eliminating the risk of electrolyte leakage from the structure; there is no violent oxidation-reduction reaction, no risk of thermal runaway, combustion and explosion, and the safety performance far exceeds that of existing battery solutions.

[0045] 5. Extremely low life-cycle cost and strong industrial adaptability: The energy storage capacitor of this invention is based on a hybrid energy storage mechanism of double-layer and weak pseudocapacitive. It has no electrode phase change, no material consumption, a cycle life of ≥200,000 cycles, a service life of ≥15 years, and is maintenance-free and has no attenuation replacement. Compared with existing lithium battery / sodium battery solutions, the life-cycle cost can be reduced by 70%~80%, which has the core advantages for large-scale industrial application and market promotion. Detailed Implementation

[0046] Example 1 (800V high-voltage hybrid electrochemical energy storage capacitor, compatible with 16V high-voltage electrolyte)

[0047] This embodiment provides an 800V high-voltage hybrid electrochemical energy storage capacitor. The module dimensions are 160mm × 100mm × 75mm, and the specific structure is as follows:

[0048] The composite copper-aluminum current collector foil uses an 80μm thick copper-aluminum composite roll, with a high-purity copper layer on one side and a high-purity aluminum layer on the other side.

[0049] Both the copper and aluminum layers are fully coated with an 80nm thick water-based carbon nanotube anchoring layer.

[0050] A 100μm thick activated carbon positive electrode layer is coated on the copper layer side, and a 100μm thick hard carbon negative electrode layer is coated on the aluminum layer side. A 2mm wide insulating edge area is reserved on both sides.

[0051] A 20μm thick cellulose insulating membrane is set between adjacent electrode units. The size of the membrane matches the carbon layer of the electrode and extends to the insulating edge area.

[0052] The total number of electrode units connected in series is 50 layers, and a 60μm thick boron nitride modified flexible epoxy insulation layer is sprayed on the edge area of ​​the interlayer insulation.

[0053] The housing is made of 6061 aluminum alloy profile, and two pressure-triggered one-way exhaust valves with an opening pressure of 0.05MPa are set at the end. The mounting base is a perforated plate structure.

[0054] The upper and lower ends of the electrode unit are provided with 0.2mm thick copper-aluminum composite current collector lead-out electrodes, which are ultrasonically welded to the copper layer and aluminum layer of the composite copper-aluminum current collector foil, respectively, and led out to the outside of the packaging shell;

[0055] The encapsulation housing is filled with a 16V withstand voltage type dual carbon electrode special organic electrolyte. The electrolyte is vacuum impregnated and completely adsorbed into the pores of the electrode carbon layer and the insulating membrane, with no free-flowing liquid accumulation.

[0056] The mass production method of this embodiment includes the following steps:

[0057] S1 Substrate Pretreatment: The 80μm thick composite copper-aluminum coil is unwound at a constant tension of 6N using a room temperature double-roll leveler to eliminate rolling internal stress and ensure that the flatness error of the substrate is ≤0.05mm / m.

[0058] S2 Anchoring Layer Coating: The leveled substrate enters the online atomization spraying station, where a water-based carbon nanotube dispersion with a solid content of 0.5% is continuously sprayed across the entire width on the side to be coated with carbon. After drying at a low temperature of 40℃ with a gentle breeze, an 80nm thick continuous carbon nanotube anchoring layer is formed.

[0059] S3 Electrode Layer Coating: A comma-shaped doctor blade coating process with a 2mm fixed edge is used to coat the outer side of the anchoring layer with activated carbon positive electrode slurry and hard carbon negative electrode slurry, respectively, with the wet thickness controlled at 100μm; after coating, it is dried in three stages with temperature zones of 40℃, 60℃ and 75℃ respectively to avoid substrate warping and deformation caused by single-sided drying; after drying, it is leveled twice and electrostatically dusted to obtain the electrode sheet;

[0060] S4 Non-destructive Transfer Positioning: Two sets of interlocking support tooth mechanisms are used to support only the insulating edge area of ​​the electrode sheet and diaphragm. The first support tooth mechanism supports the electrode sheet and moves it horizontally above the stacking station. The second support tooth mechanism is interlocked into the gap of the first support tooth mechanism and lifts it upward by 1mm to smoothly receive the electrode sheet. After the two sets of support tooth mechanisms are aligned, the first support tooth mechanism is horizontally withdrawn, and the electrode sheet is transferred to the second support tooth mechanism. After calibration by the side positioning baffle, the positioning error is ≤±0.1mm. The arrangement of 50 layers of electrode sheets is completed in sequence.

[0061] S5 Atmosphere Replacement: The arranged electrode assembly is sent into a continuous vacuum replacement chamber. First, a vacuum is drawn down to -0.08 MPa at a rate of 0.015 MPa / min and held for 30 min. Then, high-purity nitrogen with a dew point ≤ -40℃ is slowly introduced to a slightly positive pressure. The above evacuation and filling steps are repeated twice until the oxygen content in the chamber is ≤ 50 ppm. The nitrogen is recycled.

[0062] S6 Insulation layer forming: Under a nitrogen protective atmosphere, a dual-station atomization spraying system is used to vacuum spray the insulation edge area of ​​the electrode assembly. The spraying material is boron nitride modified flexible epoxy adhesive, and the coating thickness is controlled at 60μm.

[0063] S7 Curing and Encapsulation: After spraying, the pressure is slowly released to atmospheric pressure at a rate gradient of 0.01 MPa / min to avoid substrate deformation caused by sudden pressure changes; then, it is vacuum cured at 60℃ for 120 min, and the current collector electrode is ultrasonically welded to the composite copper-aluminum current collector foil and installed into an aluminum alloy encapsulation shell; in a low dew point vacuum drying room with a dew point ≤-40℃, the encapsulation shell is vacuum injected with a special organic electrolyte for dual carbon electrodes, and a vacuum impregnation process is used to make the electrolyte completely adsorbed into the pores of the electrode carbon layer and the insulating membrane. After the injection is completed, the encapsulation shell is laser welded and sealed.

[0064] The 800V high-voltage hybrid electrochemical energy storage capacitor prepared in this embodiment has a rated capacity of 1500F, an energy density of 68Wh / L, and a power density of 1250W / kg. After 200,000 cycles at a 1C charge-discharge rate, the capacity retention rate is ≥95%, with no risk of thermal runaway and no electrolyte leakage, fully meeting the needs of grid area energy storage, industrial high-voltage backup and other scenarios.

[0065] Example 2 (1200V high voltage hybrid electrochemical energy storage capacitor, compatible with conventional electrolyte)

[0066] This embodiment provides a 1200V high-voltage hybrid electrochemical energy storage capacitor. The only difference from Embodiment 1 is that the total number of electrode units connected in series is adjusted to 380 layers, and the electrolyte is a 3.5V withstand voltage conventional dual-carbon electrode special organic electrolyte. The rest of the structure and manufacturing process are the same as in Embodiment 1, achieving stable adaptation to the 1200V rated working voltage.

[0067] Example 3 (Another embodiment of the exhaust structure)

[0068] The only difference between this embodiment and Embodiment 1 is that the pressure-triggered exhaust structure adopts a comb-tooth type mounting seat one-way valve. The comb-tooth structure is embedded in the reserved groove of the encapsulation shell to achieve sealed installation. The rest of the structure and process are completely the same. Attached Figure Description

[0069] Figure 1 is a schematic diagram of the stacked structure of a high-voltage hybrid electrochemical energy storage capacitor;

[0070] Explanation of reference numerals in the attached figures:

[0071] 1 - Composite copper-aluminum current collector foil;

[0072] 2 - Carbon nanofiber anchoring layer;

[0073] 3 - Activated carbon positive electrode layer;

[0074] 4 - Hard carbon anode layer;

[0075] 5 - Cellulose insulating membrane;

[0076] 6 - Flexible thermally conductive insulation layer;

[0077] 7 - Encapsulation housing;

[0078] 8 - Pressure-triggered exhaust structure;

[0079] 9 - Current collector lead-out electrode.

Claims

1. A high-voltage hybrid electrochemical energy storage capacitor, characterized in that, It includes at least two sets of electrode units arranged in series, the electrode units comprising: A composite copper-aluminum current collector foil, wherein one or both sides of the composite copper-aluminum current collector foil are provided with a continuous full-width coated carbon nano-anchoring layer. The outer side of the carbon nano-anchoring layer is provided with a localized coated electrode carbon layer, wherein one side of the composite copper-aluminum current collector foil is an activated carbon positive electrode layer and the opposite side is a hard carbon negative electrode layer, and an insulating edge area is reserved around the electrode carbon layer. An insulating diaphragm is provided between adjacent electrode units; The electrode unit has a flexible thermally conductive insulating layer between the insulating edge area and the interlayer gap; It also includes a package housing for sealing and accommodating the electrode unit, a pressure-triggered venting structure disposed on the package housing, and a current-collecting lead-out electrode disposed at the end of the electrode unit; The encapsulation housing is filled with a special organic electrolyte for dual carbon electrodes, and the electrolyte wets the electrode carbon layer and the insulating membrane. The rated operating voltage of the energy storage capacitor is ≥800V, and the number of electrode units connected in series can be flexibly increased or decreased according to the target operating voltage.

2. The high-voltage hybrid electrochemical energy storage capacitor according to claim 1, characterized in that, The carbon nanotube anchoring layer is a carbon nanotube or graphene oxide layer with a thickness of 50~100nm.

3. The high-voltage hybrid electrochemical energy storage capacitor according to claim 1, characterized in that, The thickness of the electrode carbon layer is 80~120μm, and the width of the insulating edge area is 1.5~3mm; the flexible thermally conductive insulating layer is a boron nitride modified flexible epoxy layer with a thickness of 50~80μm.

4. The high-voltage hybrid electrochemical energy storage capacitor according to claim 1, characterized in that, The insulating membrane is a porous polymer membrane, a cellulose membrane, or a ceramic-coated membrane, with a thickness of 15–30 μm.

5. The high-voltage hybrid electrochemical energy storage capacitor according to claim 1, characterized in that, The pressure-triggered exhaust structure is a normally closed flexible check valve with an opening pressure of 0.03~0.08MPa. The mounting seat of the check valve is a comb-type or perforated plate structure.

6. The high-voltage hybrid electrochemical energy storage capacitor according to claim 1, characterized in that, The current collector lead-out electrode is a copper-aluminum composite conductive electrode ear, which is connected to the copper layer and aluminum layer of the composite copper-aluminum current collector foil respectively, and led out to the outside of the packaging shell; the number of electrode units connected in series is 50 to 380 layers.

7. The high-voltage hybrid electrochemical energy storage capacitor according to claim 1, characterized in that, The organic electrolyte for the dual-carbon electrode is a tetraethylammonium tetrafluoroborate / propylene carbonate system with a single electrode unit withstand voltage ≥3.5V, or a high-voltage organic electrolyte with a single electrode unit withstand voltage ≥16V.

8. A method for large-scale mass production of the high-voltage hybrid electrochemical energy storage capacitor according to any one of claims 1-7, characterized in that, Includes the following steps: S1 Substrate Pretreatment: The composite copper-aluminum current collector foil is subjected to constant tension double-roller leveling and stress relief treatment to eliminate the internal stress of substrate rolling. S2 Anchoring Layer Coating: Carbon nanoparticle dispersion is continuously sprayed onto the carbon side of the composite copper-aluminum current collector foil using a full-width atomized spraying, and then dried at low temperature to form a carbon nanoparticle anchoring layer. S3 Electrode Layer Coating: On the outside of the carbon nano-anchor layer, a localized coating process with fixed edge is used to prepare the electrode carbon layer, controlling the uniformity of the carbon layer's shape, size and thickness, and then drying and shaping it in three stages at low temperature. S4 Non-destructive transfer and positioning: It adopts two sets of interlocking support tooth mechanisms, which only support the insulating edge area of ​​the electrode sheet, and performs synchronous non-destructive transfer and precise positioning of the coated electrode sheet and insulating diaphragm, without contacting the electrode carbon layer throughout the process. S5 Atmosphere Replacement: The arranged electrode assembly is placed into a sealed cavity, and gradient vacuum extraction and multiple slow-filling replacements with dry nitrogen are performed to form a protective atmosphere. S6 Insulation layer forming: Under a protective atmosphere, flexible thermally conductive insulating material is vacuum sprayed onto the insulation edge area and interlayer gap of the electrode unit to form a continuous insulation layer; S7 Curing and Encapsulation: After spraying, the pressure is slowly released and cured at low temperature. Then, the current collector electrode is welded to the composite copper-aluminum current collector foil and installed into the encapsulation shell. The special organic electrolyte for dual carbon electrodes is injected in a vacuum environment. After the liquid injection is completed, the encapsulation shell is sealed. Finally, the pressure-triggered exhaust structure is assembled, and the finished product is completed after the airtightness test.

9. The manufacturing method according to claim 8, characterized in that, In step S2, the carbon nanotube dispersion is an aqueous carbon nanotube dispersion with a solid content of 0.3%~0.8% and a drying temperature of 35~45℃; in step S3, the localized coating process uses a comma-shaped doctor blade coating, and the width of the guard edge matches the width of the insulation margin area; the temperature zones of the three-stage gradient low-temperature drying are 35~45℃, 55~65℃, and 70~80℃ respectively.

10. The manufacturing method according to claim 8, characterized in that, In step S4, the specific steps of the non-destructive transfer and positioning are as follows: the first supporting tooth mechanism supports the insulating edge area of ​​the electrode sheet and the diaphragm and moves it horizontally above the stacking station; the second supporting tooth mechanism is inserted alternately into the gap of the first supporting tooth mechanism and lifted upward by 0.8~1.2mm to catch the electrode sheet; after the two sets of supporting tooth mechanisms are aligned, the first supporting tooth mechanism is horizontally withdrawn and the electrode sheet is transferred to the second supporting tooth mechanism. After calibration by the side positioning baffle, the second supporting tooth mechanism descends, and the electrode plate falls to the preset position.

11. The manufacturing method according to claim 8, characterized in that, In step S5, the gradient vacuum extraction rate is 0.01~0.02MPa / min, and the final vacuum degree is -0.06~-0.09MPa; the nitrogen slow filling and replacement is repeated 2~3 times, and the final oxygen content in the cavity is ≤50ppm.

12. The manufacturing method according to claim 8, characterized in that, In step S7, the rate of gradual pressure release is 0.008~0.015MPa / min, the low-temperature curing temperature is 55~65℃, and the curing time is 90~150min; the liquid injection adopts a vacuum impregnation method, and the electrolyte is completely adsorbed into the pores of the electrode carbon layer and the insulating membrane, and there is no free-flowing liquid accumulation inside the encapsulation shell.

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