High-precision positioning double-ring cooperative monomer battery and module

Abstract

This invention provides a high-precision positioned dual-ring collaborative single-cell battery and module. The structure, from top to bottom, coaxially arranges a positive current collector, a fan-shaped ring positioning insulator, a separator-positive electrode composite sheet, a circular ring positioning insulator, a negative electrode disc, and a negative current collector. The dual-ring positioning insulator is fixed with a high-temperature resistant adhesive and uses an interference fit with both the separator-positive electrode composite sheet and the negative electrode disc to achieve radial positioning, reducing coaxiality deviation. The insulator is made of high-temperature resistant mica, with an outer diameter larger than the current collector, forming a short-circuit protection barrier. The circular ring is integrally formed with a long strip lead-out structure, supporting direct testing without welding. This invention features high-precision self-positioning, high-temperature resistance, reliable insulation, and simple assembly. It supports in-situ material replacement at high temperatures, effectively solving the problems of interlayer misalignment, high short-circuit risk, and low testing efficiency in existing batteries, significantly improving the repeatability and reliability of test data.

Description

Technical Field

[0001] This invention relates to the field of new energy battery technology, specifically to a high-precision positioning dual-ring collaborative single cell battery and module. Background Technology

[0002] Energy storage and special power batteries are core components of modern equipment, aerospace, and military emergency power supplies. As the basic unit constituting a battery module, the structural design, interlayer positioning accuracy, high-temperature adaptability, and ease of assembly and testing of individual cells directly determine the discharge stability, safety, reliability, and lifespan of the entire product series. Thermal batteries, as a type of disposable reserve power source using molten salt as the electrolyte and possessing long static life, wide temperature range operation, and high power output characteristics, are widely used in critical scenarios such as missiles, spacecraft, and special emergency equipment. The internal interlayer coaxiality, high-temperature structural stability, short-circuit protection design, and testing and assembly efficiency of individual cells are key factors restricting the improvement of overall thermal battery performance and the iteration of material research. Optimization of individual cell structures and improvement of supporting testing adaptability have always been important research directions in the field of thermal batteries.

[0003] Current structural design and testing / assembly technologies related to thermal battery cells still have many inherent defects, and similar existing technologies have not effectively solved these problems. For example, Chinese patent document CN111354955A discloses a thermal battery cell testing device and method, and Chinese patent document CN109298338A discloses a battery assembly system and cell replacement method. However, the former relies on an external support, a single-ring limiting ring, and a push-back mechanism to achieve cell assembly and feeding testing, and only achieves rough limiting through an external device. The latter uses a bolt-fastened external frame and a single positioning mold to fix the cell. Neither of these methods effectively solves the problems of individual cells. The existing cells have a layered collaborative positioning structure, which suffers from poor positioning accuracy between layers and is prone to misalignment at high temperatures. They also lack a short-circuit protection structure with an outer diameter of the insulating component larger than the current collector, posing a potential internal short-circuit safety hazard. Furthermore, they all rely on external fasteners for fixation, resulting in cumbersome and inefficient assembly and disassembly processes. The lack of an integrated, weld-free test lead-out structure prevents in-situ material replacement under high-temperature insulation conditions. Overall, they suffer from common problems such as insufficient positioning accuracy, lack of safety and reliability, complex assembly and testing processes, and poor data repeatability, making it difficult to meet the R&D and testing requirements for high-precision, high-efficiency, and high-stability thermal battery cells. Therefore, a new technical solution that can address these shortcomings at the individual cell structure level is urgently needed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a high-precision positioning dual-ring collaborative single-cell battery and module.

[0005] According to the present invention, a high-precision positioning dual-ring cooperative single cell battery comprises, from top to bottom, a positive electrode current collector, a fan-shaped ring positioning insulator, and a separator, which are coaxially stacked. Positive electrode composite sheet, circular ring positioning insulator, negative electrode disc and negative electrode current collector; The circular ring positioning insulating component and the sector-shaped ring positioning insulating component form a double-ring cooperative positioning structure, and the two are fixedly connected. The circular ring positioning insulating component is integrally formed with a long strip lead-out structure; The inner ring of the sector-shaped positioning insulating member and the diaphragm The positive electrode composite sheet is interference-fitted, and the inner ring of the circular ring positioning insulation component is interference-fitted with the negative electrode disc to achieve radial positioning and coaxial assembly of each functional layer.

[0006] Preferably, the positive current collector and the negative current collector are solid sheet-like conductive structures made of conductive metal materials, including elemental metals such as copper, iron, gold, silver, and nickel, or their alloys, with a surface flatness not exceeding 0.05 mm. The outer diameters of the positive current collector and the negative current collector are both smaller than the outer diameters of the circular ring positioning insulator and the sector-shaped ring positioning insulator.

[0007] Preferably, both the sector-shaped ring positioning insulator and the circular ring positioning insulator are made of high-temperature resistant mica, with a temperature resistance range of not less than 600℃ and a dielectric strength of not less than 20kV / mm. The sector angle of the sector-shaped ring positioning insulation component is 120°–180°; The diaphragm The interference fit deviation between the positive electrode composite sheet and the inner ring of the sector-shaped positioning insulation component shall not exceed 0.2 mm, and the interference fit deviation between the negative electrode circular sheet and the inner ring of the circular positioning insulation component shall not exceed 0.2 mm.

[0008] Preferably, the circular ring positioning insulation component and the sector-shaped ring positioning insulation component are fixed with a high-temperature resistant adhesive. The high-temperature resistant adhesive is selected from at least one of water glass and sodium silicate-based high-temperature resistant inorganic adhesives. The adhesive layer thickness does not exceed 0.3 mm, and the high-temperature resistant adhesive does not volatilize or suffer structural failure in an environment of 0–600℃.

[0009] Preferably, the negative electrode disc is made of lithium metal or a lithium alloy, and the lithium alloy includes lithium copper alloy, lithium aluminum alloy, lithium silicon alloy and lithium boron alloy.

[0010] Preferably, the diaphragm The positive electrode composite sheet is integrally formed by molding process, including diaphragm material and positive electrode material, and after molding, it is interference-fitted with the inner ring of the fan-shaped ring positioning insulation component.

[0011] Preferably, the positive electrode material comprises an active material and an electrolyte material in a mass ratio of 8:2; The active material is selected from at least one of the following: iron disulfide, cobalt disulfide, nickel disulfide, molybdenum disulfide, tungsten disulfide, multi-component sulfides, nickel chloride, cobalt chloride, iron fluoride, cobalt fluoride, cobalt oxide, nickel oxide, lithium iron phosphate, lithium nickel manganese oxide, lithium cobalt oxide, and ternary materials. The electrolyte material is selected from LiCl. KCl system, LiCl LiF At least one of the LiBr system; The membrane material is made by mixing electrolyte material with MgO or Al2O3 in a preset ratio.

[0012] Preferably, the diaphragm-positive electrode composite sheet and the negative electrode disc are structurally independent or are integrally formed.

[0013] Preferably, the length of the elongated lead-out structure is 100–120 mm and the width is 15–17 mm, used for direct clamping testing, and the contact resistance fluctuation during the test does not exceed 10 mΩ.

[0014] According to the present invention, a thermal battery module is composed of a dual-ring cooperative single cell with high-precision positioning.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention employs a dual-ring positioning system, combining a fan-shaped ring and a circular ring, to independently radially limit the separator-positive electrode composite sheet and the negative electrode disc. Combined with an interference fit design and bonding fixation, this forms an internal mechanical constraint system. This structure ensures that the coaxiality deviation of each functional layer remains ≤0.2mm under assembly and high-temperature operating conditions, thereby ensuring a stable electrode reaction interface and uniform current distribution, fundamentally improving the discharge consistency and test data repeatability of individual cells.

[0016] 2. This invention uses high-temperature resistant mica as the material for the positioning and insulating components, combined with water glass or sodium silicate-based inorganic binders, resulting in no volatilization or structural cracking within the 0–1000℃ range. The low coefficient of thermal expansion of mica further suppresses thermal deformation, ensuring that the overall structure maintains stable shape and insulation performance throughout the entire operating temperature range of the thermal battery, thus expanding its applicability and safety in high-temperature and high-power scenarios.

[0017] 3. This invention designs the outer diameters of the circular ring and the sector ring to be 2–3 mm larger than the outer diameters of the positive and negative current collectors, thus forming a physical extension barrier in the radial direction of the insulating components. This design structurally prevents the positive and negative current collectors from directly contacting each other due to assembly deviations, vibrations, or thermal deformation. Combined with the high insulation strength of mica material, it achieves intrinsic safety protection and significantly reduces the risk of internal short circuits commonly found in high-temperature batteries.

[0018] 4. This invention eliminates external fasteners such as bolts, employing interference fits and adhesive bonding for rapid alignment and fixation of each functional layer, with an assembly time of ≤3 minutes. The integrated circular ring elongated lead-out structure supports weld-free clamping testing, with contact resistance fluctuations ≤10mΩ, avoiding solder joint failure issues at high temperatures. This structure is further adapted to high-temperature testing devices, allowing direct sample replacement while in a heat-insulated state without the need for cooling disassembly, greatly simplifying the testing process and improving R&D and batch testing efficiency. Attached Figure Description

[0019] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of a single battery cell with dual-ring collaborative high-precision positioning in Embodiment 1 of the present invention; Figure 2 This is a discharge diagram of a dual-ring cooperative positioning single-cell battery based on the FeS2 cathode in Embodiment 2 of the present invention. Figure 3 This is a discharge diagram of a dual-ring cooperative positioning single-cell battery based on a NiS2 cathode in Embodiment 3 of the present invention. Figure 4 This is a discharge diagram of a dual-ring co-positioning single-cell battery based on the Fe0.3Co0.7S2 cathode in Embodiment 4 of the present invention.

[0020] Explanation of reference numerals in the attached figures: Detailed Implementation

[0021] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0022] Example 1 This embodiment provides a high-precision positioning dual-ring collaborative single cell. This structure achieves high-precision, high-stability, and high-efficiency single cell assembly and testing through dual-ring collaborative positioning, high-temperature resistant material selection, integrated lead-out structure, and boltless assembly design.

[0023] I. Overall Structural Composition Reference Figure 1 As shown, the single cell structure is coaxially assembled with the following layers from top to bottom: positive current collector 1, fan-shaped ring positioning insulation component 2, separator-positive electrode composite sheet 3, circular ring positioning insulation component 4, negative electrode disc 5, and negative current collector 6. The layers are aligned and fixed with high precision through a double-ring cooperative positioning structure, without the need for external bolts or fasteners.

[0024] In a single cell, the positive electrode current collector 1 is used to collect the positive electrode current and conduct it outward; the fan-shaped ring positioning insulator 2 serves as a positioning composite sheet to ensure interlayer coaxiality; the separator-positive electrode composite sheet 3 serves as the reaction core, with the positive electrode releasing electricity and the separator isolating the positive and negative electrodes from lithium flow; the circular ring positioning insulator 4 serves as a positioning negative electrode, leading out for testing and insulation to prevent short circuits; the negative electrode disc 5 provides lithium ions and coordinates charge transfer; and the negative electrode current collector 6 is used to collect the negative electrode current and conduct it outward.

[0025] The sector-shaped ring positioning insulator 2 and the circular ring positioning insulator 4 constitute a double-ring positioning insulator. The double-ring positioning insulator is made of high-temperature resistant mica with a temperature resistance ≥600℃, dielectric strength ≥20kV / mm, and coefficient of thermal expansion ≤8×10. -6 / ℃.

[0026] The sector-shaped ring positioning insulation component 2 has a sector angle of 120°–180°, an outer diameter of 44mm, an inner diameter adapted to the size of the diaphragm-positive electrode composite sheet 3 (10–30mm), and a thickness of 1mm. The inner ring and the diaphragm-positive electrode composite sheet 3 are interference-fitted with a gap of 0.05–0.1mm to achieve precise radial positioning.

[0027] The outer diameter of the circular ring positioning insulator 4 is 44mm, the inner diameter is adapted to the size of the negative electrode disc 5 (10–30mm), and the thickness is 1mm. The inner ring and the negative electrode disc 5 adopt an interference fit, with a positioning deviation ≤0.2mm. The circular ring positioning insulator 4 is integrally formed with a long strip lead-out part, with a length of 100–120mm and a width of 15–17mm. The surface is flat and burr-free, and it can be directly clamped for testing.

[0028] The two rings are bonded and fixed together by a high-temperature resistant inorganic adhesive (such as water glass or sodium silicate-based adhesive), with an adhesive layer thickness of ≤0.3mm. There is no volatilization or structural failure within the temperature range of 0–1000℃.

[0029] The outer diameter of the double ring is 2–3 mm larger than that of the positive and negative current collectors 6, forming an insulating physical barrier to prevent direct contact between the positive and negative current collectors 6 and cause a short circuit.

[0030] The positive current collector 1 and the negative current collector 6 are made of conductive metal materials, including elemental metals such as copper, iron, gold, silver, and nickel, or their alloys, preferably brass or stainless steel, with a surface flatness ≤0.05mm. Their outer diameter is slightly smaller than that of the insulating component to achieve full coverage of the electrode material layer while avoiding contact with the current collector on the opposite side.

[0031] The negative electrode disc 5 is made of lithium metal or lithium alloy. Lithium alloys include lithium copper alloy, lithium aluminum alloy, lithium silicon alloy and lithium boron alloy. Its size is adapted to the inner ring of the circular ring and is positioned by interference fit.

[0032] The positive electrode material of the separator-positive electrode composite sheet 3 is made by mixing active materials (such as iron disulfide, cobalt disulfide, nickel disulfide, molybdenum disulfide, tungsten disulfide, multi-component sulfides, nickel chloride, cobalt chloride, iron fluoride, cobalt fluoride, cobalt oxide, nickel oxide, lithium iron phosphate, lithium nickel manganese oxide, lithium cobalt oxide, and ternary materials, etc.) with electrolytes (such as the LiCl-KCl system) at a mass ratio of 8:2. The separator material is made by mixing electrolytes with MgO or Al2O3 in a certain proportion, and its size is adapted to the inner ring of the sector ring. After molding, it is directly inserted into the inner ring of the sector ring to achieve a secure and stable positioning.

[0033] The preparation process of the separator-positive electrode composite sheet 3 includes: first laying the separator material in the mold, then pouring in the positive electrode material, and molding it under a pressure of 10–15t for 50–60 seconds.

[0034] In a preferred embodiment, the diaphragm-positive electrode composite sheet 3 and the negative electrode disc 5 are structurally independent or are integrally formed.

[0035] II. Assembly and Testing Process Assembly: Stack the layers sequentially and secure them with double-ring interference fit and adhesive. No bolts are required, and the entire assembly process takes ≤3 minutes.

[0036] Testing: Direct clamping via integrated circular ring (e.g., alligator clamps), contact resistance fluctuation ≤10mΩ, no soldering required. Supports high-temperature in-situ material replacement: Samples can be directly replaced under 0–1000℃ insulation conditions without cooling or disassembly.

[0037] Example 2 This embodiment is based on Embodiment 1 and discloses a dual-ring cooperative positioning single cell based on FeS2 cathode.

[0038] 1. Test materials and specifications Positive current collector 1 / Negative current collector 6: Made of stainless steel, processed into a solid circular sheet with a diameter of 42mm and a thickness of 1mm, with an integrated long strip lead-out structure (110mm×15mm). Sector-shaped ring positioning insulation component 2: high-purity high-temperature resistant mica material, sector angle 150°, outer diameter 44mm, inner diameter 18mm (fits diaphragm-positive electrode composite sheet 3), thickness 1mm, dielectric strength 22kV / mm; Circular ring positioning insulation component 4: high-purity high-temperature resistant mica material, outer diameter 44mm, inner diameter 16mm (suitable for lithium boron alloy negative electrode), thickness 1mm, integrated molded long strip lead-out structure (110mm×16mm). Separator-cathode composite sheet 3: diameter 18mm, thickness 1mm (effective area ≈ 2.54cm²), mass ratio of cathode material (FeS2+LiCl-KCl) to separator material (LiCl-KCl+MgO) 6:10; Current calculation: Current density 100 mA / cm² 2 The corresponding current is I = 100 mA / cm. 2 ×2.54≈0.254A.

[0039] 2. Assembly and Testing Process The assembly of individual cells was carried out in an inert environment within a glove box (oxygen content ≤10ppm). First, composite sheets were molded (12t pressure held for 55 seconds), then a double-ring positioning structure was bonded (coaxiality ≤0.1mm). Finally, the components were stacked without fasteners, with assembly time not exceeding 3 minutes. Testing conditions were at 450℃, with cells directly clamped via a circular ring-shaped strip lead-out structure.

[0040] 3. Analysis of discharge curves of individual cells Reference Figure 2 As shown in the figure, the black curve represents current and the red curve represents voltage. The test results are as follows: The current remained stable at 0.2556A, perfectly matching the calculated value at a current density of 100mA / cm², with no significant fluctuations or sudden changes throughout the process. This fully demonstrates the role of the dual-ring cooperative positioning structure in ensuring the uniformity of electrode interface contact. The initial voltage value was approximately 2.2V, which gradually decreased during the discharge process, approaching 0V at 1918.6 seconds. No short circuit occurred throughout the process, effectively verifying the reliability of the differential size design of the insulating components of this single cell in conjunction with the short-circuit protection design. After the discharge test, the single cell was disassembled, revealing that the positive and negative electrode discs 5 had fully reacted, and there were no off-center or misaligned phenomena in each functional layer, further confirming the high precision and structural stability of the dual-ring layered positioning.

[0041] Example 3 This embodiment is based on Embodiment 1 and discloses a dual-ring cooperative positioning single cell based on NiS2 cathode.

[0042] 1. Test materials and specifications Positive current collector 1 / Negative current collector 6: Made of stainless steel, processed into a solid circular sheet with a diameter of 42mm and a thickness of 1mm, with an integrated long strip lead-out structure (110mm×15mm). Sector-shaped ring positioning insulation component 2: high-purity high-temperature resistant mica material, sector angle 120°, outer diameter 44mm, inner diameter 18mm (fits diaphragm-positive electrode composite sheet 3), thickness 1mm, dielectric strength 22kV / mm; Circular ring positioning insulation component 4: high-purity high-temperature resistant mica material, outer diameter 44mm, inner diameter 16mm (suitable for lithium boron alloy negative electrode), thickness 1mm, integrated molded long strip lead-out structure (110mm×16mm). Separator-cathode composite sheet 3: diameter 18mm, thickness 1mm (effective area ≈ 2.54cm²), mass ratio of cathode material (NiS2+LiCl-LiF-LiBr) to separator material (LiCl-LiF-LiBr+Al2O3) 7:10; Current calculation: Current density 100 mA / cm² 2 The corresponding current is I = 100 mA / cm. 2 ×2.54≈0.254A.

[0043] 2. Assembly and Testing Process The assembly of individual cells was carried out in an inert environment within a glove box (oxygen content ≤10ppm). First, composite sheets were molded (10t pressure held for 60 seconds), then a double-ring positioning structure was bonded (coaxiality ≤0.12mm). Finally, the components were stacked without fasteners, with assembly time not exceeding 3 minutes. Testing conditions were at 480℃, with cells directly clamped via a circular ring-shaped strip lead-out structure.

[0044] 3. Analysis of discharge curves of individual cells Reference Figure 3 As shown in the figure, the black curve represents current and the red curve represents voltage. The test results are as follows: The current remained stable at 0.2421A, which is basically consistent with the calculated value at a current density of 100mA / cm², with no significant fluctuations or sudden changes throughout the process. This fully demonstrates the role of the dual-ring cooperative positioning structure in ensuring the uniformity of electrode interface contact. The initial voltage value was about 1.97V, which gradually decreased with the discharge process, approaching 0V at 1216.5 seconds. No short circuit occurred throughout the process, effectively verifying the reliability of the differential size of the insulating components of this single cell in combination with the short-circuit protection design. After the discharge test, the single cell was disassembled, and it was found that the positive and negative electrode discs 5 had fully reacted, and there was no off-center or misalignment in each functional layer, further confirming the high precision and structural stability of the dual-ring layered positioning.

[0045] Example 4 This embodiment is based on Embodiment 1 and discloses a method based on Fe 0.3 Co 0.7 The S2 positive electrode is a dual-ring cooperative positioning single cell.

[0046] 1. Test materials and specifications Positive current collector 1 / Negative current collector 6: Made of stainless steel, processed into a solid circular sheet with a diameter of 42mm and a thickness of 1mm, with an integrated long strip lead-out structure (110mm×15mm). Sector-shaped ring positioning insulation component 2: high-purity high-temperature resistant mica material, sector angle 120°, outer diameter 44mm, inner diameter 18mm (fits diaphragm-positive electrode composite sheet 3), thickness 1mm, dielectric strength 22kV / mm; Circular ring positioning insulation component 4: high-purity high-temperature resistant mica material, outer diameter 44mm, inner diameter 16mm (suitable for lithium boron alloy negative electrode), thickness 1mm, integrated molded long strip lead-out structure (110mm×16mm). Separator-positive electrode composite sheet 3: 18mm diameter, 1mm thickness (effective area ≈ 2.54cm²), positive electrode material (Fe). 0.3 Co 0.7 The mass ratio of S2+LiCl-KCl to the membrane material (LiCl-KCl+MgO) is 6:10; Current calculation: Current density 100 mA / cm² 2 The corresponding current is I = 100 mA / cm. 2 ×2.54≈0.254A.

[0047] 2. Assembly and Testing Process The assembly of individual cells was carried out in an inert environment within a glove box (oxygen content ≤10ppm). First, composite sheets were molded (15t pressure held for 60 seconds), then a double-ring positioning structure was bonded (coaxiality ≤0.09mm). Finally, the components were stacked without fasteners, with assembly time not exceeding 3 minutes. Testing conditions were 500℃ high temperature, with direct clamping via a circular ring-shaped strip lead-out structure.

[0048] 3. Analysis of discharge curves of individual cells Reference Figure 4 As shown in the figure, the black curve represents current and the red curve represents voltage. The test results are as follows: The current remained stable at 0.2422A, which is basically consistent with the calculated value at a current density of 100mA / cm², with no significant fluctuations or sudden changes throughout the process. This fully demonstrates the role of the dual-ring cooperative positioning structure in ensuring the uniformity of electrode interface contact. The initial voltage value was approximately 2.03V, which gradually decreased during the discharge process, approaching 0V at 1535.8 seconds. No short circuit occurred throughout the process, effectively verifying the reliability of the differential size of the insulating components of this single cell in conjunction with the short-circuit protection design. After the discharge test, the single cell was disassembled, and it was found that the positive and negative electrode discs 5 had fully reacted, and there was no off-center or misalignment in each functional layer, further confirming the high precision and structural stability of the dual-ring layered positioning.

[0049] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A high-precision positioning dual-ring cooperative single-cell battery, characterized in that, From top to bottom, the positive current collector, the sector-shaped ring positioning insulation component, and the diaphragm are coaxially stacked. Positive electrode composite sheet, circular ring positioning insulator, negative electrode disc and negative electrode current collector; The circular ring positioning insulating component and the sector-shaped ring positioning insulating component form a double-ring cooperative positioning structure, and the two are fixedly connected. The circular ring positioning insulating component is integrally formed with a long strip lead-out structure; The inner ring of the sector-shaped positioning insulating member and the diaphragm The positive electrode composite sheet is interference-fitted, and the inner ring of the circular ring positioning insulation component is interference-fitted with the negative electrode disc to achieve radial positioning and coaxial assembly of each functional layer.

2. The high-precision positioning dual-ring cooperative single-cell battery according to claim 1, characterized in that, The positive current collector and the negative current collector are solid sheet-like conductive structures made of conductive metal materials, including elemental metals such as copper, iron, gold, silver, and nickel or their alloys, with a surface flatness of no more than 0.05 mm. The outer diameters of the positive current collector and the negative current collector are both smaller than the outer diameters of the circular ring positioning insulator and the sector-shaped ring positioning insulator.

3. The high-precision positioning dual-ring cooperative single-cell battery according to claim 1, characterized in that, Both the sector-shaped ring positioning insulation component and the circular ring positioning insulation component are made of high-temperature resistant mica, with a temperature resistance range of not less than 600℃ and a dielectric strength of not less than 20kV / mm. The sector angle of the sector-shaped ring positioning insulation component is 120°–180°; The diaphragm The interference fit deviation between the positive electrode composite sheet and the inner ring of the sector-shaped positioning insulation component shall not exceed 0.2 mm, and the interference fit deviation between the negative electrode circular sheet and the inner ring of the circular positioning insulation component shall not exceed 0.2 mm.

4. The high-precision positioning dual-ring cooperative single-cell battery according to claim 1, characterized in that, The circular ring positioning insulation component and the sector ring positioning insulation component are fixed with a high-temperature resistant adhesive. The high-temperature resistant adhesive is selected from at least one of water glass and sodium silicate-based high-temperature resistant inorganic adhesives. The thickness of the adhesive layer does not exceed 0.3 mm, and the high-temperature resistant adhesive does not volatilize or suffer structural failure in an environment of 0–600℃.

5. The high-precision positioning dual-ring cooperative single-cell battery according to claim 1, characterized in that, The negative electrode disc is made of lithium metal or lithium alloy, and the lithium alloy includes lithium copper alloy, lithium aluminum alloy, lithium silicon alloy and lithium boron alloy.

6. The high-precision positioning dual-ring cooperative single-cell battery according to claim 1, characterized in that, The diaphragm The positive electrode composite sheet is integrally formed by molding process, including diaphragm material and positive electrode material, and after molding, it is interference-fitted with the inner ring of the fan-shaped ring positioning insulation component.

7. The high-precision positioning dual-ring cooperative single-cell battery according to claim 6, characterized in that, The positive electrode material comprises an active material and an electrolyte material, with a mass ratio of 8:

2. The active material is selected from at least one of the following: iron disulfide, cobalt disulfide, nickel disulfide, molybdenum disulfide, tungsten disulfide, multi-component sulfides, nickel chloride, cobalt chloride, iron fluoride, cobalt fluoride, cobalt oxide, nickel oxide, lithium iron phosphate, lithium nickel manganese oxide, lithium cobalt oxide, and ternary materials. The electrolyte material is selected from LiCl. KCl system, LiCl LiF At least one of the LiBr system; The membrane material is made by mixing electrolyte material with MgO or Al2O3 in a preset ratio.

8. The high-precision positioning dual-ring cooperative single-cell battery according to claim 1, characterized in that, The diaphragm-positive electrode composite sheet and the negative electrode disc are structurally independent or are integrally formed.

9. The high-precision positioning dual-ring cooperative single-cell battery according to claim 1, characterized in that, The length of the strip lead-out structure is 100–120 mm and the width is 15–17 mm. It is used for direct clamping tests, and the contact resistance fluctuation during the test does not exceed 10 mΩ.

10. A thermal battery module, characterized in that, It is composed of a dual-ring synergistic single cell with high-precision positioning as described in any one of claims 1 to 9.

Images