Quickly assembled button cell structure

Abstract

This invention belongs to the field of battery technology, and particularly relates to a rapid-assembly coin cell battery structure, comprising an electrode component assembly, a research electrode, and a counter electrode component assembly arranged sequentially. The research electrode carries an electrolyte. The electrode component assembly includes an electrode shell, an elastic unit, a rigid unit, and a first connecting unit. The elastic unit is connected to the electrode shell and the rigid unit via the first connecting unit. The counter electrode component assembly includes a counter electrode shell, a counter electrode material, a separator, and a second connecting unit. The counter electrode material is connected to the counter electrode shell and the separator via the second connecting unit. Compared to existing structures, this invention significantly simplifies and accelerates the coin cell battery assembly process by parameterizing and modularizing the electrodes and counter electrode, significantly reducing the skill requirements for operation. This effectively ensures battery consistency and performance (such as reducing the internal resistance of the coin cell battery) and also significantly improves research efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and in particular relates to a quick-assembly button battery structure. Background Technology

[0002] Button cells, with their cost-effectiveness, high efficiency, and compact structure, have become an ideal platform for research on battery components such as electrolytes, electrode materials, and solid electrolytes. However, the traditional assembly process has significant bottlenecks: it involves 10-15 steps, from placing the casing to final sealing, and the steps must be strictly followed in sequence. Furthermore, the assembly process is highly sensitive to the skill level of the operators, and any deviation in any step may cause fluctuations in battery performance, thereby interfering with the reliability of the experimental conclusions.

[0003] like Figure 1 As shown, according to industry-standard specifications (see "Assembly, Charge / Discharge Measurement and Data Analysis of Lithium-ion Button Batteries," Energy Storage Science and Technology, 2018), the standard assembly sequence is: negative electrode shell → negative electrode sheet → separator → electrolyte → positive electrode sheet → metal gasket → spring sheet → positive electrode shell. This process is widely used in universities and enterprises, but the fully manual operation mode exposes two major drawbacks:

[0004] Poor assembly consistency: If there is a coaxiality deviation in the components of each layer, it will lead to poor interface contact, increased internal resistance and degraded electrochemical performance; uneven force application or severe misalignment may even induce internal short circuits.

[0005] Low operational efficiency: A single experiment often requires the repeated assembly of dozens of batteries, and researchers spend a lot of time on mechanically repetitive steps, making it difficult to focus on core data analysis. Summary of the Invention

[0006] To overcome the aforementioned shortcomings and address the issues of poor coaxiality and uneven force during manual assembly of coin cell batteries, which can lead to increased internal resistance and even short circuits, this invention provides a rapid assembly coin cell battery structure. This structure mainly comprises electrode component assemblies and counter electrode component assemblies. By replacing conventional multiple components with two integrated parts, it achieves the following effects: solving the technical challenges of high internal resistance and poor consistency in coin cell battery assembly; and overcoming the bottleneck of cumbersome and inefficient coin cell battery assembly steps.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A quick-assembly coin cell includes a counter electrode assembly, a research electrode, and an electrode assembly arranged sequentially, wherein the research electrode contains an electrolyte.

[0009] Compared to existing technologies, this invention simplifies and streamlines the coin cell assembly process through parameterized and modular design of the electrodes and counter electrodes. This design significantly reduces the skill requirements of the operator, better ensures battery consistency and performance (such as effectively reducing internal resistance), and thus facilitates related research activities.

[0010] As an improvement to the quick-assembly button cell of this invention, the electrode component assembly includes a positive electrode shell, an elastic unit, and a rigid unit. The elastic unit is disposed between the bottom of the positive electrode shell and the rigid unit. The elastic unit continuously provides internal pressure to the battery after encapsulation to ensure good contact between the two sides of the research electrode; the rigid unit provides a platform for placing the research electrode and distributes the pressure evenly.

[0011] As an improvement to the quick-assembly coin cell of this invention, the counter electrode assembly includes a negative electrode shell, a negative electrode material, and a separator, wherein the negative electrode material is disposed between the negative electrode shell and the separator. The negative electrode may not require a current collector, and the negative electrode material may be lithium, sodium, potassium, magnesium, aluminum, carbon-based (including graphite, soft carbon / hard carbon, carbon nanotubes), silicon-based (including silicon-carbon, nano-silicon, silicon alloys), lithium titanate, or MXene. The separator material may be selected from PP, PE, PI, PVDF, glass fiber separator, ceramic-coated separator, semi-solid gel electrolyte separator, or solid electrolyte separator.

[0012] The quick-assembly button cell battery structure of this utility model includes at least the following steps:

[0013] The first step is to take the electrode component assembly, place a research electrode on it, and add electrolyte. The electrolyte can be selected according to the research electrode. The range of electrolytes is relatively large, including lipid electrolytes, nitrile electrolytes, and aqueous electrolytes. The amount is not fixed, ranging from 1 to 5 drops. Alternatively, semi-solid / gel electrolytes or solid electrolytes can be added by dripping or screw feeding.

[0014] The second step is to take the electrode component assembly, place it on top of the research electrode, apply a pressure of 1-100N, and press it to form an assembly.

[0015] The third step involves taking the assembled components, placing them on a sealing machine, and applying pressure to complete the sealing process. The sealing pressure is 1-10 MPa. This assembly technology can be automated, requiring only researchers to perform loading and unloading operations, and simply to snap the positive and negative electrode shells together.

[0016] As an improvement to the quick assembly button cell battery structure connection method of this utility model, the specific steps of the first step are as follows:

[0017] 1.1) Take the positive electrode shell and the elastic unit, align them tightly, and weld them into a whole;

[0018] 1.2) Take a rigid unit, align it tightly with the elastic unit side of the above-mentioned whole, and weld them into a larger whole to form the counter electrode component assembly. During the positioning process, ensure that the standard error of the center positioning dimension is less than 0.1mm. This counter electrode component can be manufactured in continuous batches, with a high degree of industrialization.

[0019] As an improvement to the rapid assembly method for button batteries of this utility model, the specific steps of the second step are as follows:

[0020] 2.1) Take the negative electrode shell and the negative electrode material. The negative electrode material is punched into the required shape by the machine and pressed into the negative electrode shell by the punching force to form a pressing structure. The pressing force is 5-100N.

[0021] 2.2) Place the separator membrane on top of the negative electrode shell and punch it into the required shape using a machine. Simultaneously, press it into the negative electrode shell from the previous step using a punching force, ensuring a tight bond between the separator membrane and the negative electrode material to form an electrode component assembly. The punching force is 5-100N; during the punching process, ensure that the dimensional standard error is less than 0.1mm. This electrode component can be manufactured in continuous batches, exhibiting a high degree of industrialization.

[0022] As an improvement to the rapid assembly method for button batteries of this invention, in the second step, the negative electrode shell, negative electrode material, and separator can be pre-coated or surface-treated to enhance the fastening force. Specific treatment methods include applying at least one of epoxy resin conductive adhesive, silicone resin conductive adhesive, polyurethane conductive adhesive, polyimide conductive adhesive, UV-cured conductive adhesive, or polymer microsphere conductive adhesive, or one of the following methods: surface sandblasting / shot peening, laser micro-processing, mechanical grinding / polishing, surface chemical etching, surface chemical coating, or surface doping heat treatment.

[0023] As an improvement to the quick assembly method for button batteries of this utility model, in step S2.2, the specific method for ensuring the standard error of dimensions is one of the following three:

[0024] It is accomplished by mechanical positioning on the processing equipment, specifically one of the following: limit block, positioning block, positioning pin, chuck, and fixture;

[0025] Positioning is achieved using sensors on the processing equipment, specifically one of photoelectric sensors, position sensors, laser rangefinders, or image recognition sensors.

[0026] It is accomplished through high-precision transmission on the processing equipment, specifically through a precision servo motor and a precision transmission mechanism.

[0027] Compared to existing technologies, this invention employs modular electrode and counter electrode components. Through a clever connection design, it achieves rapid assembly of coin cells while precisely controlling pressure and ensuring center alignment. This solution effectively guarantees the consistency of the assembled cells and significantly reduces internal resistance, providing significant convenience for battery research in scientific research institutions. The key to reducing internal resistance in this invention lies in: precise control of pressure parameters; and high alignment of component centers—both of which offer significant advantages over manual assembly. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the exploded structure of a button cell in the prior art.

[0029] Figure 2 This is an exploded structural diagram of the button battery in this utility model.

[0030] Figure 3 This is a cross-sectional view of the button cell in this utility model.

[0031] Figure 4 This is a partially enlarged structural diagram of the electrode component assembly in the button cell of this utility model.

[0032] Figure 5 This is a partially enlarged structural diagram of the counter electrode component assembly in the button cell of this utility model. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0036] Example 1

[0037] like Figures 2 to 5 As shown, this embodiment provides a button cell structure using the manufacturing steps described in this utility model. This example is a lithium iron phosphate (LFP) research electrode, a lithium anode, and is equipped with a lithium iron phosphate (LFP) electrolyte and a PI separator.

[0038] 1) The manufacturing process of electrode parts is as follows:

[0039] Take the positive electrode casing 11 of a 2032 button cell, a stainless steel elastic gasket 12, and a stainless steel flat gasket 13, and place them in the manufacturing equipment. The first step is to align the inner side of the positive electrode casing 11 with the elastic gasket 12 using a limiting block. When the positive electrode casing 11 is transported to the welding process by the conveyor belt, it is blocked and positioned by the arc-shaped lower limiting block. When the elastic gasket 12 is transported to the welding station, it is dropped into the positive electrode casing 11 and then positioned at the center of the casing by a double-ring conical upper limiting block. The outer ring of the double-ring conical upper limiting block matches the casing, and the inner ring matches the elastic gasket, providing positioning and initial clamping. Then, mechanical spot welding is performed at every 60 degrees of the contact circle between the elastic gasket 12 and the casing 11, for a total of 6 points, forming a weld connection 14. The second step is to align the flat gasket 13 with the side of the elastic gasket 12 of the welding assembly. The alignment steps are the same as above. The upper and lower limiting blocks can be moved away during transport and returned to their positions during positioning. The spot welding connection is also performed at 6 points, forming a weld connection 14, thus obtaining the electrode part.

[0040] The assembly error of the limiting block is 50µm. When the outer shell, elastic gasket, and flat gasket are transported to the alignment position, the 50µm error of the limiting block is the positioning dimension error. Each spot welding consists of 6 points, with a weld strength of 78N. The 2032 shell area is 314mm². 2 The connection force is 24.8 N / cm. 2 .

[0041] 2) The manufacturing process of the electrode parts is as follows:

[0042] Take the negative electrode casing 31, lithium metal 32, and PI separator 33 of a 2032 button cell battery and place them in the manufacturing equipment. The first step is to feed the lithium metal and separator rolls. Lithium metal is used here as the negative electrode, which has inherent adhesive properties and can be bonded under pressure. It is important to note that the equipment must be in an inert atmosphere or a low dew point environment. The second step is to align the inner side of the negative electrode casing 31 with the lithium metal 32. The casing is positioned using an arc-shaped limiting block. Before cutting, the lithium metal is in roll form and does not require precise positioning; during feeding, simply correct any deviation to ensure it does not shift left or right. Cut the lithium metal 33... 2. The lithium metal is stamped into the outer shell using a die made of metal. The die has a 15.5mm diameter hole, a 50µm gap, and a 100N punching force. A 15.5±0.05mm thick lithium metal is punched out from top to bottom. The punch continues downward to press the lithium metal into the center of the outer shell and press it firmly to form the connecting unit 34. The third step is to align the separator 33 with the lithium metal side of the stamped component. The separator 33 is cut in the same way and stamped into the outer shell and bonded to form the connecting unit 34, thus obtaining the counter electrode part.

[0043] The alignment method utilizes a cutting die on the processing equipment for positioning. This die combines cutting and stamping positioning functions, with a die assembly error of 50µm, which translates to a positioning error of 50µm. A pressure ring is used during die cutting to prevent material warping and burrs. The stamping force is 100N; due to elastic deformation absorbing some of the pressure, the final connection force between the lithium metal and the outer casing is measured to be 25.6N / cm. 2 Lithium metal and separator 22.5 N / cm 2 .

[0044] 3) The final assembly steps are as follows:

[0045] Take the manufactured electrode part 1, counter electrode part 3, LFP research electrode 2, and LFP electrolyte. First, align electrode part 1 and LFP research electrode 2, place electrode 2 on electrode part 1, and deliver 3 drops of LFP electrolyte. This operation is completed by automated equipment. Second, take counter electrode part 3, cover it on top of the assembly, and apply 5N of pressure for pre-compression. Third, place the pre-compressed battery on the sealing device and apply 6MPa of pressure to complete the encapsulation. The alignment method is the mechanical positioning limit block on the assembly equipment, and the assembly error of the limit block is 50um.

[0046] Three assembled button cells, numbered M01-M03, were randomly sampled and tested for the following performance characteristics:

[0047] Capacity testing: The battery capacity was tested in an environment of 25℃ according to the following procedure: stand for 3 minutes, charge at a constant current of 0.5C to 4.2V, charge at a constant voltage of 0.05C, stand for 3 minutes, discharge at a constant current of 0.5C to 3.0V to obtain the first discharge capacity D0 and the first discharge energy E0. After standing for 3 minutes, the capacity test was completed. The battery thickness, length and width were measured, the battery volume V was calculated, and the volumetric energy density of the battery = E0 / V was calculated. The results are shown in Table 1.

[0048] Internal resistance test: After standing for 3 minutes, the internal resistance of the cell was tested using an electrochemical workstation at a frequency of 30 Hz. The internal resistance of the battery was obtained and recorded in Table 1.

[0049] Coulomb efficiency and 300-cycle capacity decay rate test: The battery was activated by charging and discharging 3 times at 0.1C at 25℃, left to stand for 1 hour, and then cycled at 1C. The results are recorded in Table 1.

[0050] Example 2

[0051] like Figures 2 to 5 As shown, this embodiment provides a button cell structure using the manufacturing steps described in this utility model. This example is a lithium iron phosphate (LFP) research electrode, a lithium anode, and is equipped with a lithium iron phosphate (LFP) electrolyte and a PI separator.

[0052] 1) The manufacturing process of electrode parts is as follows:

[0053] Take the positive electrode casing 11 of a 2032 button cell battery, a stainless steel elastic gasket 12, and a stainless steel flat gasket 13, and place them in the manufacturing equipment. The first step is to align the inner side of the positive electrode casing 11 with the elastic gasket 12 using a limiting block. When the positive electrode casing 11 is transported to the welding process by the conveyor belt, it is blocked and positioned by the arc-shaped lower limiting block. When the elastic gasket 12 is transported to the welding station, it is dropped into the positive electrode casing 11 and then positioned to the center of the casing by a double-ring conical upper limiting block. The outer ring of the double-ring conical upper limiting block matches the casing, and the inner ring matches the elastic gasket. One drop of epoxy conductive adhesive is mechanically delivered inside the casing and smoothed by a mechanical pressure head, covering an area of ​​254 mm². 2 After smoothing, the thickness is 100um. Then, the elastic gasket and the outer shell are initially pressed together and transported aside to stand for 24 hours to form connection 14. The second step is to align the flat gasket 13 with the side of the elastic gasket 12 of the component after it has been standing. The alignment steps are the same as above. The upper and lower limit blocks can be moved away during transportation and returned to their positions during positioning. Similarly, apply 1 drop of conductive adhesive to the surface of the flat gasket and smooth it out. The application area is 254mm². 2 After smoothing, the thickness is 100um. Then, the side with adhesive is initially pressed with the elastic gasket and transported to the side to stand for 24 hours to form connection 14, thus obtaining the electrode part.

[0054] The assembly error of the limiting block is 50µm. When the outer shell, elastic gasket, and flat gasket are transported to the alignment position, the 50µm error of the limiting block is the positioning dimensional error. The bonding point is a ring, the bonding strength is 55N, and the area of ​​the 2032 shell is 314mm². 2 The overall connection force is 17.5 N / cm. 2 .

[0055] 2) The manufacturing process of the electrode parts is as follows:

[0056] Take the negative electrode casing 31, lithium metal 32, and PI separator 33 of a 2032 button cell battery and place them in the manufacturing equipment. The first step is to feed the lithium metal and separator rolls. Here, lithium metal is used as the negative electrode. A layer of epoxy conductive adhesive with a thickness of 75µm is coated onto the surface of the lithium metal. It is important to note that the equipment must be in an inert atmosphere or a low dew point environment. The second step is to align the inner side of the negative electrode casing 31 with the lithium metal 32. The casing is positioned using an arc-shaped limiting block. Before cutting, the lithium metal is in roll form and does not require precise positioning. During feeding, simply correct the deviation to ensure no left or right offset. Cut the lithium metal 32 and punch it. The lithium metal is pressed into the outer shell and cut using a mold made of metal. The mold has a 15.5mm diameter hole, a 50µm gap, and a 100N punching force. A 15.5±0.05mm thick lithium metal is punched out from top to bottom. The punch continues downward, pressing the lithium metal into the center of the outer shell and pressing it firmly to form the connecting unit 34. In the third step, the separator 33 is aligned with the lithium metal side of the above-mentioned stamping component. A layer of epoxy resin conductive adhesive is applied to the separator. The separator 33 is then cut in the same way and pressed into the outer shell for bonding to form the connecting unit 34, thus obtaining the counter electrode part.

[0057] The alignment method utilizes a cutting die on the processing equipment for positioning. This die combines cutting and stamping positioning functions, with a die assembly error of 50µm, which translates to a positioning error of 50µm. A pressure ring is used during die cutting to prevent material warping and burrs. The stamping force is 100N. After strengthening the adhesion with conductive adhesive, the final connection force between the lithium metal and the casing is measured to be 31.3N / cm. 2 Lithium metal and separator 28.9 N / cm 2 .

[0058] 3) The final assembly steps are as follows:

[0059] Take the manufactured electrode part 1, counter electrode part 3, LFP research electrode 2, and LFP electrolyte. First, align electrode part 1 and LFP research electrode 2, place electrode 2 on electrode part 1, and deliver 3 drops of LFP electrolyte. This operation is completed by automated equipment. Second, take counter electrode part 3, cover it on top of the assembly, and apply 5N of pressure for pre-compression. Third, place the pre-compressed battery on the sealing device and apply 6MPa of pressure to complete the encapsulation. The alignment method is the mechanical positioning limit block on the assembly equipment, and the assembly error of the limit block is 50um.

[0060] The tests and implementation examples are the same as in Example 1, numbered M04-M06, and the rest will not be described in detail.

[0061] Comparative Example

[0062] like Figure 1 As shown, this comparative example provides a conventional method for assembling a button cell, including the following steps:

[0063] Prepare 10 / 70 positive and negative electrode shells, 20 separators, 30 negative electrode plates, 40 positive electrode plates, electrolyte, 50 metal gaskets, and 60 metal springs for a total of 6 sets to assemble 6 button batteries.

[0064] Take the negative electrode shell 10 and put in the negative electrode plate 20;

[0065] Take the positive electrode casing 70, and place the spring piece 60 and the gasket 50 on it;

[0066] An LFP positive electrode plate 40 is placed on a gasket inside the positive electrode casing 70;

[0067] A separator 30 is placed on the electrode sheet inside the positive electrode shell 70;

[0068] Add 3 drops of LFP electrolyte;

[0069] The center dimension alignment error in the above steps is visible to the naked eye, and the measurement range is 0.5-2mm;

[0070] Use tweezers to pick up the assembled negative electrode shell 10, cover it on the assembled positive electrode shell 70, and press it firmly;

[0071] Place the clamping component on the sealing machine and manually apply pressure of 6MPa to complete the sealing process;

[0072] The internal resistance of the six assembled batteries was tested under the same conditions as in Example 1, numbered T01-T06.

[0073] As can be seen from Examples 1 and 2, the resistance of the six assembled batteries sampled was very small and the fluctuation was small, indicating that both welding and bonding can produce batteries with good performance. Compared with bonding, welding is a better method because welding is a metal conductor, which is better than conductive adhesive.

[0074] As can be seen from Example 1 and Comparative Example 1, the battery manufactured by this novel structure has significantly better performance. This is due to the enhanced connection and strict alignment brought about by structural optimization, which increases the conductivity of the interface and avoids failure and short circuit caused by misalignment.

[0075] Table 1. Test results of the button battery assembled with the structure of this utility model.

[0076]

[0077] Table 2. Test results of button cells assembled using traditional methods.

[0078]

[0079] Comparing M01-03 of Example 1 and M04-06 of Example 2, it can be found that the component using welding and self-adhesive connection units has better internal resistance, coulombic efficiency, capacity and retention rate than the component with adhesive layer. This is because the adhesive layer has an additional interface layer and extra material, which increases the battery's internal resistance and makes it more likely to have interface side reactions, thus reducing battery performance. Therefore, welding and self-adhesive connection units are the preferred option.

[0080] Comparing M01-M06 of Examples 1 and 2 with T01-T06 of the Comparative Examples, it can be found that the battery assembled by this invention has significantly better internal resistance, coulombic efficiency, capacity and retention rate than the battery assembled by the traditional method. The internal resistance is reduced by 46%, the efficiency is increased by 0.02%, the capacity is increased by 2mAh, and the capacity retention rate is increased by 2%. This shows that the structure of this invention can indeed effectively improve battery performance and plays a very good role.

[0081] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A fast-assembly coin cell structure, comprising an electrode component assembly, a research electrode, and a counter electrode component assembly arranged sequentially, wherein the research electrode contains an electrolyte, characterized in that: The electrode component assembly includes an electrode shell, an elastic unit, a rigid unit, and a first connecting unit. The elastic unit is located between the bottom of the electrode shell and the rigid unit, and the elastic unit is connected to the electrode shell and the rigid unit through the first connecting unit. The counter electrode component assembly includes a counter electrode shell, a counter electrode material, a separator, and a second connecting unit. The counter electrode material is disposed between the counter electrode shell and the separator, and the counter electrode material is connected to both the counter electrode shell and the separator through the second connecting unit.

2. A quick-assembly button cell battery as described in claim 1, characterized in that: The electrode shell, elastic unit, rigid unit, and counter electrode shell are metal or conductive composite material components, and the edges of the electrode or counter electrode shells are provided with an insulating layer; the electrode shell and counter electrode shell are battery shells with a size of not less than 2mm; the elastic unit is an elastic pad, spring, foam metal, conductive composite material pad, or spring; the rigid unit is a flat metal sheet or a flat conductive composite material sheet; the surface of the rigid unit may be provided with grooves, coils, or other auxiliary positioning structures; the surface of the separator may also be provided with coils, sprayed rings, printed rings, or other auxiliary positioning structures; the electrode is a positive or negative electrode, and the counter electrode is the corresponding negative or positive electrode.

3. A quick-assembly button battery as described in claim 1, characterized in that: The first connecting unit is at least one of the following: solder joint, weld seam, conductive adhesive layer, rivet or buckle.

4. A quick-assembly button cell battery as described in claim 1, characterized in that: The second connecting unit is at least one of a conductive adhesive layer, a surface treatment layer, or a self-adhesive interface layer.

5. A quick-assembly button battery as described in claim 3, characterized in that: The welding spot and the welding seam of the electrode parts are welded by at least one of resistance welding, arc welding, argon arc welding, TIG welding, MIG welding or laser welding, and the welding area is not less than 0.5mm 2 ; The conductive adhesive layer of the electrode part uses at least one of epoxy resin conductive adhesive, silicone conductive adhesive, polyurethane conductive adhesive, polyimide conductive adhesive, UV curing conductive adhesive or polymer microsphere conductive adhesive, and the coating area is greater than or equal to 2mm 2 ; The number of rivet connections on the electrode parts is ≥2; The number of snap-fit ​​connections for electrode components is ≥2.

6. A quick-assembly button cell battery as described in claim 4, characterized in that: The conductive adhesive layer for the electrodes uses at least one of the following: epoxy resin conductive adhesive, silicone resin conductive adhesive, polyurethane conductive adhesive, polyimide conductive adhesive, UV-curable conductive adhesive, or polymer microsphere conductive adhesive, with a coating area ≥ 5 mm². 2 ; The surface treatment of the electrode is one of sandblasting, shot peening, laser micro-processing, mechanical grinding, polishing, chemical etching, chemical coating or doping heat treatment, the purpose of which is to increase the surface roughness to increase the bonding force, and the surface roughness is not less than 10μm; The self-adhesive interface layer of the electrodes is formed by the fact that the soft lithium and sodium metals are inherently easy to adhere, and pressure can be applied to form an adhesive bond with an area ≥5mm². 2 .

7. A quick-assembly coin cell battery structure as described in claim 1, characterized in that: The connecting force of the first connecting unit is ≥0.05 N / cm. 2 The connecting force of the second connecting unit is ≥0.05 N / cm. 2 .

8. A quick-assembly coin cell battery structure as described in claim 7, characterized in that: The connecting force of the first connecting unit is ≥0.2 N / cm. 2 The resistance of the first connecting unit is no greater than 20mΩ; the connecting force of the second connecting unit is ≥0.2N / cm. 2 The resistance of the second connecting unit is no greater than 30mΩ.

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