Quasi-solid button type rechargeable battery
By introducing positive and negative limit rings into the button battery, the problem of polar plate drift is solved, assembly efficiency and yield is improved, cost is reduced, battery life is extended, and battery design is achieved.
Patent Information
- Application Number
- CN202422198186.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-06
AI Technical Summary
During the assembly process, the existing button batteries have no fixed position of the positive and negative electrode plates, which cause the pole plates to drift randomly with the electrolyte flow position, resulting in reduced consistency, increased defect rate, increased overall cost, and fluctuations in battery capacity and limited life.
The positive and negative electrode limit rings are used to limit the positive and negative electrode sheets to prevent the electrode sheet from drifting, and the electrode sheet stability and liquid retention rate are improved through conductive gaskets and porous polymer structures, and the assembly process is optimized.
It improves the assembly efficiency and yield of button batteries, reduces raw material costs, extends battery life and increases energy density.
Smart Images
Figure CN223092965U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a quasi-solid state button rechargeable battery. Background Art
[0002] With the development of portable electronic products, smart wearable products, medical instruments, etc., batteries are becoming more miniaturized. Therefore, a battery with a small volume, high specific energy, good sealing performance, low self-discharge, and high reliability has been developed. Because of its shape like a button, it is commonly known as a button battery. There are many types of button batteries. Among them, the lithium-ion button battery has the highest energy density and the highest working voltage.
[0003] In the existing production process of button batteries, during the assembly process, since the positive and negative electrode plates have no position fixation, after the electrolyte is dropped, the electrode plates drift randomly with the flow of the electrolyte, resulting in a change in the facing area between the positive and negative electrode plates and a fluctuation in the battery capacity. This will cause a significant reduction in the consistency of button batteries, an increase in the defective rate, and an increase in the comprehensive cost. Summary of the Utility Model
[0004] In view of this, the utility model provides a quasi-solid state button rechargeable battery to solve the problems of low consistency, high defective rate, and high comprehensive cost of button batteries.
[0005] The utility model provides a quasi-solid state button rechargeable battery, which includes a cover body assembly and an electrode plate assembly. The cover body assembly includes a first cover body and a second cover body. The first cover body and the second cover body are connected to each other, and a closed accommodating cavity is formed inside; the electrode plate assembly is arranged in the accommodating cavity of the cover body assembly; the electrode plate assembly includes a positive electrode limiting ring, a negative electrode limiting ring, a positive electrode plate, a separator, and a negative electrode plate; the positive electrode plate is arranged inside the positive electrode limiting ring, the negative electrode plate is arranged inside the negative electrode limiting ring, and the separator is arranged between the positive electrode limiting ring and the negative electrode limiting ring.
[0006] In an optional embodiment, the positive electrode limiting ring and / or the negative electrode limiting ring is an elastic member.
[0007] In an optional embodiment, it further includes a conductive gasket, and the conductive gasket is arranged inside the positive electrode plate limiting ring or the negative electrode limiting ring. The conductive gasket is a polymer structure layer.
[0008] In an optional embodiment, the radius of the outer circle of the smaller one of the positive electrode limiting ring and the negative electrode limiting ring is φ o , the inner circle radius of the positive electrode limiting ring is φ ci , the inner circle radius of the negative electrode limiting ring is φ ai , φ ci < φ ai < φ o .
[0009] In an optional embodiment, the radius of the positive electrode plate is φc , the radius φ of the negative electrode sheet a , φ ci = φ c + 0.005 mm, φ ai = φ a + 0.005 mm.
[0010] In an alternative embodiment, the inner ring radius of the open end of the first cover is φ u , and the inner ring radius of the open end of the second cover is φ d , φ u = φ d - 0.05 mm; the value of φ d is 4.75 mm, 5.0 mm, 6.25 mm, 8.0 mm or 10.0 mm.
[0011] In an alternative embodiment, the radius of the conductive gasket is φ g , φ g = φ c , the radius of the separator is φ m , φ o ≤ φ m ≤ φ u .
[0012] In an alternative embodiment, the total height of the quasi-solid state button-type rechargeable battery along its axis is h c , h c The value of is 1.6 mm, 2.0 mm, 2.5 mm, 2.7 mm or 3.2 mm.
[0013] In an alternative embodiment, the axial height of the positive electrode limiting ring is h sc , the axial height of the negative electrode limiting ring is h sa , the axial height of the conductive gasket is h g , h c / 2 ≤ h g < h sc , the conductive gasket is disposed within the positive electrode limiting ring, h sa < h sc ; or, the conductive gasket is disposed within the negative electrode limiting ring, h sc < h sa .
[0014] In an alternative embodiment, the positive electrode limiting ring, the negative electrode limiting ring, and the conductive gasket are all porous structures; the specific surface areas of the positive electrode limiting ring and the negative electrode limiting ring are both S s , the effective porosity is P s , the specific surface area of the conductive gasket is S g , the effective porosity is P g ; S s ≥ 100 m2 / g, P s ≥60%, 60m 2 / g ≤ S g ≤100m 2 / g, 30% ≤ P g ≤70%.
[0015] Beneficial effects:
[0016] For the quasi-solid state button-type rechargeable battery provided by the present utility model, due to the provision of a positive electrode limiting ring and a negative electrode limiting ring, the positive electrode sheet is arranged within the positive electrode limiting ring, and the negative electrode sheet is arranged within the negative electrode limiting ring. The positive electrode limiting ring can limit the positive electrode sheet, and the negative electrode limiting ring can limit the negative electrode sheet, preventing the movement of the positive electrode sheet and / or the negative electrode sheet, fundamentally eliminating the drift of the electrode sheet caused by the addition of the electrolyte, ensuring the stability of the facing area between the positive electrode sheet and the negative electrode sheet, and improving the assembly efficiency and yield.
[0017] In addition, since the facing position of the electrode sheets is determined, the negative electrode sheet can be designed more extremely, reducing the amount of excess negative electrode, thereby reducing the usage amount of the main negative electrode material and copper foil, and reducing the cost from the raw materials. Description of the drawings
[0018] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0019] Figure 1 It is an exploded view of a quasi-solid state button-type rechargeable battery according to an embodiment of the present utility model;
[0020] Figure 2 It is Figure 1 a schematic assembly structure diagram of the positive electrode limiting ring, the separator, and the negative electrode limiting ring in
[0021] Figure 3 It is Figure 2 a sectional view along the axial direction;
[0022] Figure 4 It is Figure 2 a top view of
[0023] Figure 5 It is Figure 2 a bottom view of
[0024] Figure 6 a sectional view along the axial direction of a quasi-solid state button-type rechargeable battery according to an embodiment of the present utility model after assembly;
[0025] Figure 7 This is an axial cross-sectional view of another quasi-solid state button-type rechargeable battery according to an embodiment of the present invention after assembly.
[0026] Description of reference numerals:
[0027] 1. First cover body; 2. Sealing insulating pad; 3. Conductive gasket; 4. Positive electrode limiting ring; 5. Positive electrode sheet; 6. Diaphragm; 7. Negative electrode sheet; 8. Negative electrode limiting ring; 9. Second cover body. Specific implementation manners
[0028] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.
[0029] Currently, in the lithium-ion battery industry, whether it is material manufacturers or cell manufacturers, the testing cost is one of the items with the highest proportion in the R & D cost. As a quick method for testing the electrical performance of materials, button batteries are widely used by various companies. Due to the inherent problems of the current assembly process and the proficiency of testing personnel, the yield of button battery production is low and the consistency is poor, resulting in low reliability of evaluation data. Each manufacturer has to increase the number of button batteries produced in a single evaluation to improve the overall evaluation reliability. If the manufacturing difficulties can be solved and the production yield of button batteries can be improved, the material evaluation cost will be greatly reduced and the R & D cost will be lowered.
[0030] Production yield is an important indicator in the battery manufacturing industry, which directly affects the cost and market competitiveness. The major manufacturers in the global button battery market are all committed to continuous technological innovation and process improvement to promote the improvement of the production yield of button batteries and reduce the production cost.
[0031] In the existing button battery production process, during the assembly process, since the positive and negative electrode sheets are not fixed in position, after the electrolyte is dropped, the electrode sheets drift randomly with the flow of the electrolyte, resulting in a change in the facing area between the positive and negative electrode sheets 7 and a fluctuation in the battery capacity, which will cause a significant reduction in the consistency of button batteries, an increase in the defective rate, and an increase in the comprehensive cost.
[0032] Moreover, due to the limited volume of button batteries and the special structure of the top cover, there will be gas during the pressing process, resulting in a limited amount of pre-added electrolyte. As the cycle life increases, the electrolyte is continuously consumed, resulting in a sudden drop in capacity attenuation, which greatly limits the life and application scenarios of button batteries.
[0033] In view of the above problems, the present utility model starts from the internal space of the button battery and fundamentally improves the pain points existing in the current structure and process through a linkage assembly process, which can reduce the raw material cost, improve the assembly efficiency and yield, increase the energy density, and extend the life of the battery cell.
[0034] The following combines Figures 1 to 7 , to describe the embodiments of the present utility model.
[0035] According to an embodiment of the present utility model, a quasi-solid-state button rechargeable battery is provided, which includes a cover body assembly and a pole piece assembly. The cover body assembly includes a first cover body 1 and a second cover body 9, the first cover body 1 and the second cover body 9 are connected to each other, and a closed accommodation cavity is formed inside; the pole piece assembly is arranged in the accommodation cavity of the cover body assembly; the pole piece assembly includes a positive electrode limiting ring 4, a positive electrode sheet 5, a separator 6, a negative electrode sheet 7 and a negative electrode limiting ring 8; the positive electrode sheet 5 is arranged inside the positive electrode limiting ring 4, the negative electrode sheet 7 is arranged inside the negative electrode limiting ring 8, and the separator 6 is arranged between the positive electrode limiting ring 4 and the negative electrode limiting ring 8.
[0036] In the quasi-solid-state button rechargeable battery provided by the embodiment of the present utility model, due to the provision of the positive electrode limiting ring 4 and the negative electrode limiting ring 8, the positive electrode sheet 5 is arranged inside the positive electrode limiting ring 4, the negative electrode sheet 7 is arranged inside the negative electrode limiting ring 8, the positive electrode limiting ring 4 can limit the positive electrode sheet 5, and the negative electrode limiting ring 8 can limit the negative electrode sheet 7, preventing the movement of the positive electrode sheet 5 and / or the negative electrode sheet 7, fundamentally eliminating the drift of the pole piece caused by the electrolyte filling, ensuring the stable facing area of the positive electrode sheet 5 and the negative electrode sheet 7, and improving the assembly efficiency and yield.
[0037] In addition, since the facing positions of the positive electrode sheet 5 and the negative electrode sheet 7 are determined, the negative electrode sheet 7 can be designed more extremely, reducing the amount of excess negative electrode, thereby reducing the usage amount of the negative electrode main material and copper foil, and reducing the cost from the raw materials.
[0038] Specifically, in the related technical solution, the molar percentage of the positive electrode amount is 100 mol%, the molar percentage of the negative electrode amount is 108 mol%, and the excess amount is 8 mol%. By using the quasi-solid-state button rechargeable battery provided by the embodiment of the present utility model, the negative electrode amount can be reduced to 104 mol%, and the excess amount is 4 mol%. The present utility model can significantly reduce the amount of excess negative electrode.
[0039] In some embodiments, the positive electrode limiting ring 4 and / or the negative electrode limiting ring 8 is an elastic member.
[0040] By setting the positive electrode limiting ring 4 and / or the negative electrode limiting ring 8 as an elastic member, after the first cover body 1 and the second cover body 9 are connected, the positive electrode limiting ring 4 and the negative electrode limiting ring 8 can be squeezed between the first cover body 1 and the second cover body 9. The positive electrode limiting ring 4 and the negative electrode limiting ring 8 are elastic structural members.
[0041] In some embodiments, the positive electrode limiting ring 4 and the negative electrode limiting ring 8 are polymers, and the polymers themselves have elastic properties.
[0042] Furthermore, in some embodiments, the positive electrode limiting ring 4 and the negative electrode limiting ring 8 are porous structures, and the porous structures provide a compression deformation space for the positive electrode limiting ring 4 and the negative electrode limiting ring 8, so that the positive electrode limiting ring 4 and the negative electrode limiting ring 8 have elastic properties. The positive electrode limiting ring 4 and the negative electrode limiting ring 8 are high-porosity porous polymer structures, which can improve the liquid retention rate and enhance the cycle life of the button battery.
[0043] Furthermore, in some embodiments, the positive electrode limiting ring 4 has electrical conductivity. The negative electrode limiting ring 8 has electrical conductivity.
[0044] With such a setting, in the embodiments as Figure 6 shown, the positive electrode limiting ring 4 is disposed on the side of the first cover 1, and the negative electrode limiting ring 8 is disposed on the side of the second cover 9, which can ensure that an electrical conduction path is formed between the positive electrode limiting ring 4 and the first cover 1, and an electrical conduction path is formed between the negative electrode limiting ring 8 and the second cover 9.
[0045] In some embodiments, it further includes a conductive gasket 3, and the conductive gasket 3 is disposed inside the positive electrode limiting ring 4 or the negative electrode limiting ring 8, and the conductive gasket 3 is a polymer structure layer.
[0046] Traditional button batteries use metal gaskets. By providing the conductive gasket 3 in the present utility model, the combination of the metal gasket and the elastic piece is omitted, which can reduce the overall weight of the button battery and improve the energy density.
[0047] Specifically, in the embodiments as Figure 6 shown, the conductive gasket 3 is disposed inside the positive electrode limiting ring 4. At this time, due to the provision of the conductive gasket 3, the axial height of the positive electrode limiting ring 4 is higher than the axial height of the negative electrode limiting ring 8.
[0048] In the embodiments as Figure 7 shown, the conductive gasket 3 is disposed inside the negative electrode limiting ring 8. At this time, due to the provision of the conductive gasket 3, the axial height of the negative electrode limiting ring 8 is higher than the axial height of the positive electrode limiting ring 4.
[0049] Furthermore, in some embodiments, the conductive gasket 3 is also a porous structure of a polymer.
[0050] In some embodiments, the radius of the outer circle of the smaller one of the positive electrode limiting ring 4 and the negative electrode limiting ring 8 is φ o , the inner circle radius of the positive electrode limiting ring 4 is φ ci , the inner circle radius of the negative electrode limiting ring 8 is φ ai , φ ci < φ ai < φo 。
[0051] Specifically, the sizes of the positive electrode limiting ring 4 and the negative electrode limiting ring 8 can be equal or unequal. When the positive electrode limiting ring 4 and the negative electrode limiting ring 8 are unequal, the radius of the outer circle of the smaller one is greater than the radius of the inner circle of the positive electrode limiting ring 4.
[0052] In addition, the radius of the inner circle of the positive electrode limiting ring 4 is smaller than the radius of the inner circle of the negative electrode limiting ring 8, because the positive electrode sheet 5 is arranged inside the positive electrode limiting ring 4, and the negative electrode sheet 7 is arranged inside the negative electrode limiting ring 8. Since the negative electrode material is cheap, setting the negative electrode in excess can ensure the full utilization of the positive electrode capacity.
[0053] In some embodiments, the radius of the positive electrode sheet 5 is φ c , and the radius of the negative electrode sheet 7 is φ a , φ ci = φ c + 0.005 mm, φ ai = φ a + 0.005 mm.
[0054] With such a setting, the inner circle radius of the positive electrode limiting ring 4 is 0.005 mm larger than the radius of the positive electrode sheet 5. Similarly, the inner circle radius of the negative electrode limiting ring 8 is 0.005 mm larger than the radius of the negative electrode sheet 7. In this way, it can ensure that the positive electrode limiting ring 4 has a good limiting effect on the positive electrode sheet 5, and the negative electrode limiting ring 8 has a good limiting effect on the negative electrode sheet 7, preventing the positive electrode sheet 5 or the negative electrode sheet 7 from drifting due to the injection of the electrolyte.
[0055] In some embodiments, the inner circle radius of the open end of the first cover body 1 is φ u , and the inner circle radius of the open end of the second cover body 9 is φ d , φ u = φ d - 0.05 mm; the value of φ d is 4.75 mm, 5.0 mm, 6.25 mm, 8.0 mm or 10.0 mm.
[0056] Since the inner circle radius of the open end of the second cover body 9 is 0.05 mm larger than the inner circle radius of the open end of the first cover body 1, it can ensure that the first cover body 1 and the second cover body 9 are smoothly and tightly covered and connected.
[0057] Specifically, the first cover body 1 includes a first cover plate and a first side wall arranged along the outer periphery of the first cover plate. The first cover body 1 is a cylindrical structure with an open end.
[0058] Similarly, the second cover body 9 includes a second cover plate and a second side wall arranged along the outer periphery of the second cover plate. The second cover body 9 is a cylindrical structure with an open end.
[0059] In some embodiments, the radius of the conductive gasket 3 is φ g , φ g =φ c , the radius of the separator 6 is φ m , φ o ≤φ m ≤φ u .
[0060] φ g =φ c , ensuring that the radius of the conductive gasket 3 is equal to the radius of the positive electrode plate 5, and the size of the conductive gasket 3 is consistent with the size of the positive electrode plate 5.
[0061] φ o ≤φ m , that is, when the outer ring radius of the smaller one of the positive electrode limiting ring 4 and the negative electrode limiting ring 8 is less than the radius of the separator 6, that is, the outer circumference of the separator 6 extends at least beyond the outer ring of one of the positive electrode limiting ring 4 and the negative electrode limiting ring 8.
[0062] φ m ≤φ u , that is, the radius of the separator 6 is less than the inner diameter of the open end of the second cover 9, so as to ensure that the separator 6 can be assembled into the accommodation cavity formed by the first cover 1 and the second cover 9.
[0063] In some embodiments, the total height of the quasi-solid state button-type rechargeable battery along its axis is h c , h c takes values of 1.6 mm, 2.0 mm, 2.5 mm, 2.7 mm or 3.2 mm.
[0064] The total height h c of the quasi-solid state button-type rechargeable battery along its axis takes any one of the above values, which can meet the adaptation requirements of various electrical devices. Such as portable electronic products, smart wearable products, medical instruments, etc.
[0065] In some embodiments, the axial height of the positive electrode limiting ring 4 is h sc , the axial height of the negative electrode limiting ring 8 is h sa , the axial height of the conductive gasket 3 is h g , h c / 2≤h g <h sc .
[0066] h c / 2≤h g <h sc, that is, the axial height of the conductive gasket 3 is less than the axial height of the positive electrode limiting ring 4, so as to provide an elastic tension for the separator 6, the positive electrode sheet 5, and the negative electrode sheet 7. In this embodiment, the elastic sheet in the traditional solution is optimized, which can reduce the weight of the overall battery cell and improve the mass energy density.
[0067] In addition, the axial height of the negative electrode limiting ring 8 is less than the axial height of the positive electrode limiting ring 4, that is, h sa <h sc , because in the embodiment shown in Figure 6 , the conductive gasket 3 is arranged inside the positive electrode limiting ring 4. Therefore, the axial height of the positive electrode limiting ring 4 is greater. And in the embodiment shown in Figure 7 , the axial height of the negative electrode limiting ring 8 is greater, that is, h sa >h sc .
[0068] In some embodiments, the positive electrode limiting ring 4, the negative electrode limiting ring 8, and the conductive gasket 3 are all porous structures; the specific surface areas of the positive electrode limiting ring 4 and the negative electrode limiting ring 8 are both S s , the effective porosity is P s , the specific surface area of the conductive gasket 3 is S g , the effective porosity is P g ; S s ≥100m 2 / g, P s ≥60%, 60m 2 / g≤S g ≤100m 2 / g, 30%≤P g ≤70%.
[0069] In this embodiment, the positive electrode limiting ring 4 and the negative electrode limiting ring 8 are highly porous conductive polymers, and the conductive gasket 3 is a highly porous conductive polymer.
[0070] The porous conductive polymer is any one of three typical structural conductive polymers: polypyrrole (PPy), polyaniline (PANi), and poly(3,4-ethylenedioxythiophene) (PEDOT).
[0071] The porous conductive polymer can also be a composite conductive polymer, such as a composite structure of one or more of polyethylene oxide (PEO), polyacrylic acid (PAA), and polyvinyl alcohol (PVA) and any one of the above three typical structural conductive polymers.
[0072] Both can adsorb a large amount of electrolyte and expel the gas that cannot be discharged during the assembly process, forming a quasi-solid state environment, keeping the electrode sheet in an environment with sufficient electrolyte all the time, extending the cycle life of the battery cell. At the same time, due to the much lower density of the high-porosity polymer than that of the metal gasket and the spring piece, the weight of the battery cell is reduced, and the mass energy density of the battery cell is improved.
[0073] For the specific assembly method, place the clean button battery components in the glove box, place the negative electrode limiting ring 8 in the second cover 9, put the negative electrode sheet 7, the separator 6, the positive electrode limiting ring 4, the positive electrode sheet 5 and the conductive gasket 3 in sequence, then inject the electrolyte, cover the first cover 1, and press it to complete the assembly.
[0074] In some embodiments, the quasi-solid state button rechargeable battery further includes a sealing insulating gasket 2, which is arranged between the first cover 1 and the second cover 9 to insulatively and sealingly connect the first cover 1, the second cover 9 and the internal electrode sheet assembly.
[0075] In some embodiments, the first cover 1 has an outwardly turned first buckle edge, the second cover 9 has an inwardly turned second buckle edge, the inner diameter of the first cover 1 is smaller than that of the second cover 9, and the first cover 1 is buckled with the second cover 9 through the first buckle edge and the second buckle edge of the second cover 9. The insulating sealing gasket is arranged between the first buckle edge and the second buckle edge.
[0076] In such Figure 6 the shown embodiment, the positive electrode sheet 5 and the positive electrode limiting ring 4 are arranged close to the first cover 1.
[0077] In such Figure 7 the shown embodiment, the positive electrode sheet 5 and the positive electrode limiting ring 4 are arranged close to the second cover 9.
[0078] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.
Claims
1. A quasi-solid-state button-type rechargeable battery, characterized in that, Comprising: A cover assembly, the cover assembly includes a first cover and a second cover, the first cover and the second cover are connected to each other, and a closed accommodating cavity is formed inside; An electrode assembly, the electrode assembly is disposed in the accommodating cavity of the cover assembly; the electrode assembly includes a positive electrode limiting ring, a positive electrode sheet, a separator, a negative electrode sheet and a negative electrode limiting ring; the positive electrode sheet is disposed inside the positive electrode limiting ring, the negative electrode sheet is disposed inside the negative electrode limiting ring, and the separator is disposed between the positive electrode limiting ring and the negative electrode limiting ring.
2. The quasi-solid-state button-type rechargeable battery according to claim 1, wherein, The positive electrode limiting ring and / or the negative electrode limiting ring is an elastic member.
3. The quasi-solid-state button-type rechargeable battery according to claim 1 or 2, characterized in that, It further includes a conductive gasket, the conductive gasket is disposed inside the positive electrode limiting ring or the negative electrode limiting ring, and the conductive gasket is a polymer structure layer.
4. The quasi-solid-state button-type rechargeable battery according to claim 3, characterized in that, The radius of the outer circle of the smaller one of the positive electrode limiting ring and the negative electrode limiting ring is The inner circle radius of the positive electrode limiting ring is The inner circle radius of the negative electrode limiting ring is 5. The quasi-solid-state button-type rechargeable battery according to claim 4, wherein, The radius of the positive electrode sheet is The radius of the negative electrode sheet 6. The quasi-solid-state button-type rechargeable battery according to claim 5, wherein, The inner ring radius of the open end of the first cover body is The inner ring radius of the open end of the second cover body is The values are 4.75 mm, 5.0 mm, 6.25 mm, 8.0 mm or 10.0 mm.
7. The quasi-solid-state button-type rechargeable battery according to claim 6, wherein, The radius of the conductive gasket is The radius of the diaphragm is 8. The quasi-solid-state button-type rechargeable battery according to claim 3, wherein The total height of the quasi-solid-state button rechargeable battery along its axis is h c , h c has a value of 1.6 mm, 2.0 mm, 2.5 mm, 2.7 mm, or 3.2 mm.
9. The quasi-solid-state button-type rechargeable battery according to claim 8, wherein The axial height of the positive electrode limiting ring is h sc , the axial height of the negative electrode limiting ring is h sa , the axial height of the conductive gasket is h g , h c h / 2 ≤ g <h sc , The conductive gasket is disposed within the positive electrode limiting ring, h sa <h sc ; Or, the conductive gasket is disposed within the negative electrode limiting ring, h sc <h sa .
10. The quasi-solid-state button-type rechargeable battery according to claim 3, wherein, The positive electrode limiting ring, the negative electrode limiting ring and the conductive gasket are all of porous structures; The specific surface areas of the positive electrode limiting ring and the negative electrode limiting ring are both S s , and the effective porosity is P s , the specific surface area of the conductive gasket is S g , and the effective porosity is P g ; S s ≥100 m 2 / g, P s ≥60％， 60m 2 / g ≤ S g ≤ 100m 2 / g, 30％≤P g ≤70％。