Supporting gasket for battery and button battery

Abstract

The utility model relates to the technical field of batteries, and discloses a supporting gasket for a battery and a button battery, the supporting gasket can support a pole piece of the battery in a shell of the battery, and the supporting gasket comprises a gasket body, a supporting top surface and a supporting bottom surface which are oppositely arranged; the supporting legs are arranged on the gasket body, the two ends of each supporting leg are a connecting end and a supporting end respectively, and the connecting ends are connected with the gasket body; the pole piece is supported on the shell through the supporting end, so that the height of the pole piece in the shell can be adjusted; after the supporting gasket is pressed, the supporting legs can be folded or flattened towards the gasket body side, and the supporting top face and the supporting bottom face abut against the pole piece and the shell respectively. The utility model has the advantages that the supporting gasket can prevent the bending and rolling phenomena after the pole piece is contacted with and absorbs electrolyte, the structure is simple, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery support pad and a button battery. Background Technology

[0002] Button batteries are generally large in diameter, thin in thickness, and have a flat structure, resembling the shape of a button. They are widely used not only in various microelectronic products, but also as a tool commonly used by power and energy storage battery manufacturers for preliminary testing of the performance of positive and negative electrode materials. The specific capacity of the positive and negative electrode materials is tested by assembling button batteries.

[0003] The existing button cell battery structure mainly includes: a positive electrode shell, a support pad, a positive electrode sheet, a separator, a negative electrode sheet, and a negative electrode cap. During assembly, electrolyte is typically injected into the positive electrode shell first, then the support pad is placed inside the positive electrode shell cavity, and finally the positive electrode sheet is placed inside the positive electrode shell cavity. During this process, after contacting and absorbing the electrolyte, the positive electrode sheet is prone to bending and curling, affecting the assembly and production efficiency of the button cell battery. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a battery support pad and button battery that can prevent electrode contact, bending and curling after absorbing electrolyte, and has a simple structure and low cost.

[0005] The technical solution adopted by this utility model to solve its technical problem is to propose a battery support pad that can support the battery electrodes in the battery casing. The support pad includes:

[0006] The gasket body has a supporting top surface and a supporting bottom surface that are arranged opposite to each other;

[0007] Several support legs are disposed on the pad body, with a connecting end and a supporting end at both ends of the support legs, the connecting end being connected to the pad body; the supporting end supports the pad body, allowing the height of the electrode plate within the housing to be adjusted.

[0008] When the support pad is compressed, the support leg can be folded or flattened toward the pad body side, and the top surface and bottom surface of the support abut against the electrode and the housing, respectively.

[0009] Furthermore, a plurality of support legs are provided along the circumference of the gasket body, and the gasket body is provided with a receiving groove;

[0010] When the support pad is compressed, it can cause the multiple support legs to fold into the receiving groove.

[0011] Furthermore, the receiving groove is configured as a through groove penetrating the gasket body, and the thickness of the support leg is equal to the thickness of the gasket body;

[0012] After the support leg is folded into the receiving groove, one side of the support leg is flush with the bottom surface of the support, and the other side of the support leg is flush with the top surface of the support.

[0013] Furthermore, the gasket body is provided with a plurality of receiving grooves, and the plurality of receiving grooves correspond one-to-one with the plurality of supporting legs;

[0014] The shape of the receiving groove is adapted to the shape of the supporting leg. After the supporting leg is folded into the receiving groove, the supporting leg fills the receiving groove.

[0015] Furthermore, the connecting end of the support leg forms a bend line on the pad body, and the support leg can be bent along the bend line;

[0016] The height at which the electrode is supported can be adjusted by adjusting the bending angle of the support leg along the bend line.

[0017] Furthermore, the plurality of support legs are evenly distributed along the circumference of the pad body, and the connecting ends of the support legs are connected to the outer edge of the pad body.

[0018] The receiving groove is disposed on the bottom surface of the support and is configured as a groove with the opening facing downward; the depth of the receiving groove is equal to the thickness of the support leg; after the support leg is folded into the receiving groove, one side of the support leg abuts against the bottom of the receiving groove, and the other side of the support leg is flush with the bottom surface of the support.

[0019] Furthermore, a plurality of support legs are evenly distributed along the circumference of the gasket body, and the connecting ends of the support legs are connected to the outer edge of the gasket body.

[0020] The thickness of the support leg is equal to the thickness of the pad body. When the support leg is flattened, one side of the support leg is flush with the top surface of the support, and the other side of the support leg is flush with the bottom surface of the support.

[0021] Furthermore, the pad body and the support leg are made of stainless steel, aluminum, or aluminum alloy.

[0022] The technical solution adopted by this utility model to solve its technical problem is to propose a button battery, comprising:

[0023] The following components are arranged sequentially from bottom to top: a positive electrode shell, a first support pad, a positive electrode sheet, a separator, a negative electrode sheet, a second support pad, and a negative electrode shell. The positive electrode shell contains an electrolyte. The first support pad is configured as the aforementioned battery support pad.

[0024] Before the negative electrode shell and the positive electrode shell are press-fitted together: the first support pad supports the positive electrode sheet in the positive electrode shell at a height higher than the liquid level of the electrolyte;

[0025] After the negative electrode shell and the positive electrode shell are pressed together: the support legs of the first support pad are folded or flattened on the pad body, and its top support surface and bottom support surface abut against the positive electrode sheet and the positive electrode shell respectively, and the electrolyte wets the positive electrode sheet.

[0026] Furthermore, the positive electrode is configured as a single-sided electrode, and the active material is disposed on its upper surface.

[0027] Compared with the prior art, the present invention has at least the following beneficial effects:

[0028] (1) In this utility model, the support pad includes a pad body and several support legs extending from the pad body. The support legs are formed by bending from the pad body. When applied to a button battery, during assembly, the support legs of the support pad support the battery casing, and the electrode is supported on the support pad. The support legs adjust the height of the electrode to prevent the electrode from contacting the electrolyte in the battery casing, thus isolating the electrode from the electrolyte and preventing the electrode from absorbing the electrolyte and bending. This effectively reduces the assembly difficulty of the electrode, thereby improving the assembly efficiency and production efficiency of the button battery. The support pad has a simple structure, is easy to manufacture, and has low cost. After the button battery is assembled and pressed, the support legs fold or flatten towards the pad body under the pressure of the sealing machine, allowing the electrolyte to normally wet the electrode. The support legs do not affect the normal use of the support pad.

[0029] (2) In both embodiments of this utility model, multiple support legs are provided circumferentially around the pad body, and corresponding receiving grooves of the same shape are provided. When the support pad is compressed, the support legs fold and are received into the receiving grooves one by one, filling the grooves. One side of the support leg is flush with the support bottom surface of the pad body, ensuring the integrity and flatness of the support pad. Furthermore, the support legs do not require additional installation space, ensuring the compactness of the battery. These two embodiments can ensure that the support pad has a sufficiently large support area.

[0030] (3) In this utility model, the bending angle of the support leg can be freely adjusted, thereby achieving the purpose of adjusting the height of the electrode sheet being supported, which can effectively improve the applicable scenarios of the support pad. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the support pad structure in Embodiment 1 of this utility model;

[0032] Figure 2 for Figure 1 Cross-sectional view of the two support legs positioned opposite each other along the middle edge;

[0033] Figure 3 for Figure 2 A schematic diagram of the middle support leg after it has been folded up;

[0034] Figure 4 This is a schematic diagram of the support pad structure in Embodiment 2 of this utility model;

[0035] Figure 5 for Figure 4 Side view;

[0036] Figure 6 for Figure 4 A three-dimensional view of the structure at point A in the middle;

[0037] Figure 7 This is a schematic diagram of the support pad structure in Embodiment 3 of this utility model;

[0038] Figure 8 for Figure 7 Side view;

[0039] Figure 9 for Figure 8 A schematic diagram of the middle supporting leg after it has been flattened;

[0040] Figure 10 This is an exploded view of the button battery of this utility model.

[0041] In the picture:

[0042] 1. Support pad; 10. Pad body; 101. Support top surface; 102. Support bottom surface; 103. Receiving groove; 11. Support leg; 111. Connecting end; 111A. Bending line; 112. Support end;

[0043] 2. Positive electrode shell; 3. Positive electrode plate; 4. Separator; 5. Negative electrode plate; 6. Second support pad; 7. Negative electrode shell. Detailed Implementation

[0044] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0045] 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 certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0046] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" 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 that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0049] Example 1:

[0050] like Figures 1-3As shown, the battery support pad 1 of this embodiment can support the battery electrodes in the battery casing. The support pad 1 includes a pad body 10 and a plurality of support legs 11. The pad body 10 has a support top surface 101 and a support bottom surface 102 arranged opposite to each other. The plurality of support legs 11 are disposed on the pad body 10, and the two ends of the support legs 11 are a connecting end 111 and a supporting end 112, respectively. The connecting end 111 is connected to the pad body 10, and the support end 112 supports the electrode on the casing. The height of the electrode in the casing can be adjusted, that is, the support legs 11 can adjust the height of the electrode in the battery casing. In actual use, when the support pad 1 is compressed, the support leg 11 folds towards the pad body 10, and the top support surface 101 and the bottom support surface 102 abut against the electrode and the housing, respectively. That is, before the support pad 1 is compressed, the support end 112 of the support leg 11 supports the housing, raising the height of the electrode and preventing the electrode from contacting the electrolyte in the battery housing. After the support pad 1 is compressed, the support leg 11 folds back onto the pad body 10, without occupying additional installation space inside the battery or affecting the normal function of the support pad 1.

[0051] In this embodiment, the support pad 1 includes a pad body 10 and a plurality of support legs 11 extending from the pad body 10. The support legs 11 are formed by bending from the pad body 10. When applied to a button cell battery, during assembly, the support legs 11 of the support pad 1 support the battery casing, and the electrode is supported on the support pad 1. The support legs 11 adjust the height of the electrode to prevent the electrode from contacting the electrolyte in the battery casing, thus isolating the electrode from the electrolyte and preventing the electrode from absorbing the electrolyte and bending. This effectively reduces the assembly difficulty of the electrode, thereby improving the assembly efficiency and production efficiency of the button cell battery. The support pad 1 has a simple structure, is easy to manufacture, and has low cost. After the button cell battery is assembled and pressed, the support legs 11 are folded or flattened towards the pad body 10 under the pressure of the sealing machine, allowing the electrolyte to normally wet the electrode. The support legs 11 do not affect the normal use of the support pad 1.

[0052] Understandably, in this embodiment, the number of support legs 11 can be one or more. For example, when there is only one support leg 11, it extends from the middle of the pad body 10 and is as close as possible to the center of gravity of the support pad 1 to ensure stable support. Of course, in this embodiment, the number of support legs 11 is preferably multiple, with multiple support legs 11 arranged along the circumference of the pad body 10, and the pad body 10 is provided with a receiving groove 103. After the support pad 1 is compressed, the multiple support legs 11 can be driven to fold into the receiving groove 103, ensuring that the arrangement of the support legs 11 does not affect the normal function of the support pad 1, and does not require additional installation space. Furthermore, the utilization rate of raw materials is high when manufacturing the support pad 1. The materials of the pad body 10 and the support legs 11 can be selected, but are not limited to, stainless steel, aluminum, or aluminum alloy, which solves the problem of bending and curling of the electrode sheet due to electrolyte absorption without the need for precious metals.

[0053] Furthermore, the number of support legs 11 is greater than or equal to three, and the multiple support legs 11 are evenly distributed along the circumference of the pad body 10. The connecting ends 111 of the support legs 11 are connected to the outer edge of the pad body 10, and each connecting end 111 forms a bend line 111A at the outer edge of the pad body 10. By freely adjusting the bending angle of the support legs 11, the height they can support can be adjusted, thereby adjusting the height of the supported electrode. In this embodiment, the receiving groove 103 is provided on the supporting bottom surface 102 of the support pad 1, and is set as a downward-facing groove, that is, the receiving groove 103 is a blind groove, not penetrating the pad body 10, and the thickness of the pad body 10 is greater than the thickness of the support legs 11.

[0054] The depth of the receiving groove 103 is equal to the thickness of the supporting leg 11. After the supporting leg 11 is folded into the receiving groove 103, one side of the supporting leg 11 abuts against the bottom of the receiving groove 103, and the other side of the supporting leg 11 is flush with the support bottom surface 102. The supporting leg 11 does not bulge outward after being folded. Optionally, the receiving groove 103 can be set as an annular groove arranged around the circumference of the gasket body 10, and multiple supporting legs 11 can be folded into the annular receiving groove 103. The receiving groove 103 is easy to process. Alternatively, the receiving groove 103 can be set as a groove corresponding to each of the multiple supporting legs 11, and its shape is the same as the groove. After the supporting leg 11 is folded, it fills the receiving groove 103, ensuring the integrity of the supporting gasket 1.

[0055] Example 2:

[0056] like Figures 4-6 As shown, the support pad 1 in this embodiment has a similar overall structure to the support pad in embodiment one, but the difference lies in:

[0057] In this embodiment, the receiving groove 103 is configured as a through groove penetrating the gasket body 10, and the thickness of the support leg 11 is equal to the thickness of the gasket body 10. When the support leg 11 is folded into the receiving groove 103, one side of the support leg 11 is flush with the bottom support surface 102, and the other side of the support leg 11 is flush with the top support surface 101. The through groove is easy to process, and the operation is simple when bending the support leg 11, ensuring that the support gasket 1 is easy to manufacture. The gasket body 10 is provided with multiple receiving grooves 103, and each of the multiple receiving grooves 103 corresponds to a multiple support leg 11. Furthermore, the shape of the receiving groove 103 is adapted to the shape of the support leg 11, and after the support leg 11 is folded into the receiving groove 103, the support leg 11 fills the receiving groove 103. In actual use, when the support pad 1 is compressed, all its support legs 11 are filled into the corresponding receiving grooves 103, forming an integral pad structure, just like the existing pad structure, and will not affect the normal function of the support pad.

[0058] Combining Embodiments 1 and 2, in these two embodiments, multiple support legs 11 are arranged circumferentially on the pad body 10, and preferably, corresponding and shape-fitting receiving grooves 103 are provided. When the support pad 1 is compressed, the support legs 11 fold down one by one and are accommodated in the receiving grooves 103, filling the receiving grooves 103. One side of each support leg 11 is flush with the support bottom surface 102 of the pad body 10, ensuring the integrity and flatness of the support pad 1. Furthermore, the support legs 11 do not require additional installation space, ensuring the compactness of the battery. In these two embodiments, within a confined space, the support pad 1 can be guaranteed to have a sufficiently large support area, meaning the contact area between the support top surface 101 of the support pad 1 and the electrode is large, resulting in a good support effect for the support pad 1.

[0059] Example 3:

[0060] like Figures 7-9 As shown, the support pad 1 in this embodiment has a similar overall structure to that in Embodiment 1 and Embodiment 2, but the difference lies in:

[0061] In this embodiment, a plurality of support legs 11 are evenly distributed along the circumference of the gasket body 10, and the connecting ends 111 of the support legs 11 are connected to the outer edge of the gasket body 10. The thickness of the support legs 11 is equal to the thickness of the gasket body 10. When the support legs 11 are flattened, one side of the support leg 11 is flush with the top support surface 101, and the other side of the support leg 11 is flush with the bottom support surface 102. When the support gasket 1 is compressed, the support legs 11 can be flattened towards the gasket body 10, and the top support surface 101 and the bottom support surface 102 abut against the electrode and the housing, respectively.

[0062] That is, when the support pad 1 is compressed, the support leg 11 flattens out towards the pad body 10 instead of folding, and there is no need to open a receiving groove 103 on the pad body 10, making the manufacturing of the support pad 1 simpler. However, it cannot be guaranteed that its support top surface 101 can be as large as in Embodiment 1 and Embodiment 2, and the overall integrity does not achieve the effect of Embodiment 1 and Embodiment 2.

[0063] Considering both Embodiment 1, Embodiment 2, and Embodiment 3:

[0064] The support pad 1 includes a pad body 10 and several support legs 11 extending from the pad body 10. The support legs 11 are formed by bending from the pad body 10. When applied to a button cell battery, during assembly, the support legs 11 of the support pad 1 support the battery casing, and the electrode is supported on the support pad 1. The support legs 11 raise the height of the electrode, preventing the electrode from contacting the electrolyte in the battery casing, thus isolating the electrode from the electrolyte and preventing the electrode from absorbing electrolyte and bending. This effectively reduces the assembly difficulty of the electrode, thereby improving the assembly efficiency and production efficiency of the button cell battery. The support pad 1 has a simple structure, is easy to manufacture, and has low cost. After the button cell battery is assembled and pressed, under the pressure of the sealing machine, the support legs 11 fold or flatten towards the pad body 10, allowing the electrolyte to normally wet the electrode. The support legs 11 do not affect the normal use of the support pad 1.

[0065] Furthermore, the connecting end 111 of the support leg 11 of the support pad 1 forms a bend line 111A on the pad body 10, and the support leg 11 can be bent along the bend line 111A. By adjusting the bending angle of the support leg 11 along the bend line 111A, the height of the electrode being supported can be adjusted. In actual use, the bending angle of the support leg 11 of the support pad 1 can be freely adjusted, thereby achieving the purpose of adjusting the height of the electrode being supported, which can effectively improve the applicability of the support pad 1.

[0066] like Figure 10 As shown, when the support pad 1 from Embodiment 1, Embodiment 2, or Embodiment 3 is applied to a button cell, the button cell includes:

[0067] The following components are arranged sequentially from bottom to top: positive electrode shell 2, first support pad 1, positive electrode sheet 3, separator 4, negative electrode sheet 5, second support pad 6, and negative electrode shell 7, which abut against each other. Electrolyte is contained within the positive electrode shell 2. The first support pad 1 is configured as the battery support pad 1 used in Embodiment 1, Embodiment 2, or Embodiment 3. Before the negative electrode shell 7 is pressed into the positive electrode shell 2: the height of the positive electrode sheet 3 supported by the first support pad 1 within the positive electrode shell 2 is higher than the electrolyte level, preventing the positive electrode sheet 3 from bending or curling due to contact with the electrolyte. After the negative electrode shell 7 is pressed into the positive electrode shell 2: the support legs 11 of the first support pad 1 are folded or flattened within the pad body 10, and its top support surface 101 and bottom support surface 102 abut against the positive electrode sheet 3 and the positive electrode shell 2, respectively, allowing the electrolyte to wet the positive electrode sheet 3.

[0068] Among them, the positive electrode 3 is set as a single-sided electrode, and the active material (such as lithium iron phosphate, nickel cobalt manganese ternary material, lithium cobalt oxide, etc.) is set on its upper surface, so that it is not easy to come into contact with the electrolyte before the battery is pressed into place.

[0069] The steps for assembling a button battery are as follows:

[0070] S1. First, lay the positive electrode shell 2 flat;

[0071] S2. Inject electrolyte into positive electrode shell 2 and gently shake positive electrode shell 2 to spread electrolyte evenly in the inner cavity of positive electrode shell 2.

[0072] S3. Adjust the angle of the support leg 11 of the first support pad 1 and insert it into the inner cavity of the positive electrode shell 2 so that the height of the support top surface 101 is higher than the electrolyte liquid surface.

[0073] S4. Place the positive electrode 3 (single-sided electrode) on the support top surface 101 with the active material side facing up;

[0074] S5. Cover the active material surface of the positive electrode 3 with the separator 4;

[0075] S6. Place the negative electrode 5 on top of the separator 4;

[0076] S7. Place the second support pad 6 on the negative electrode plate and completely cover the negative electrode plate 5;

[0077] S8. The inner cavity of the negative electrode shell 7 covers the electrode sheet, and the negative electrode shell 7 is clamped into the positive electrode shell 2 by a sealing machine to complete the pressing of the button battery.

[0078] In summary, in this utility model, the support pad 1 can prevent the electrode from contacting, bending and curling after absorbing electrolyte, and the structure is simple and the cost is low.

Claims

1. A battery support pad for supporting battery electrodes within the battery casing, characterized in that, The support pad includes: The gasket body has a supporting top surface and a supporting bottom surface that are arranged opposite to each other; Several support legs are disposed on the pad body, with a connecting end and a supporting end at both ends of the support legs, the connecting end being connected to the pad body; the supporting end supports the pad body, allowing the height of the electrode plate within the housing to be adjusted. When the support pad is compressed, the support leg can be folded or flattened toward the pad body side, and the top surface and bottom surface of the support abut against the electrode and the housing, respectively.

2. The battery support pad according to claim 1, characterized in that, A plurality of support legs are provided along the circumference of the gasket body, and the gasket body is provided with a receiving groove; When the support pad is compressed, it can cause the multiple support legs to fold into the receiving groove.

3. The battery support pad according to claim 2, characterized in that, The receiving groove is configured as a through groove penetrating the gasket body, and the thickness of the support leg is equal to the thickness of the gasket body; After the support leg is folded into the receiving groove, one side of the support leg is flush with the bottom surface of the support, and the other side of the support leg is flush with the top surface of the support.

4. The battery support pad according to claim 2 or 3, characterized in that, The gasket body is provided with a plurality of receiving slots, and the plurality of receiving slots correspond one-to-one with the plurality of supporting legs; The shape of the receiving groove is adapted to the shape of the supporting leg. After the supporting leg is folded into the receiving groove, the supporting leg fills the receiving groove.

5. The battery support pad according to claim 1, characterized in that, The connecting end of the support leg forms a bend line on the pad body, and the support leg can be bent along the bend line; The height at which the electrode is supported can be adjusted by adjusting the bending angle of the support leg along the bend line.

6. The battery support pad according to claim 2, characterized in that, Multiple support legs are evenly distributed along the circumference of the pad body, and the connecting ends of the support legs are connected to the outer edge of the pad body; The receiving groove is disposed on the bottom surface of the support and is configured as a groove with the opening facing downward; the depth of the receiving groove is equal to the thickness of the support leg; after the support leg is folded into the receiving groove, one side of the support leg abuts against the bottom of the receiving groove, and the other side of the support leg is flush with the bottom surface of the support.

7. The battery support pad according to claim 1, characterized in that, Multiple support legs are evenly distributed along the circumference of the gasket body, and the connecting ends of the support legs are connected to the outer edge of the gasket body. The thickness of the support leg is equal to the thickness of the pad body. When the support leg is flattened, one side of the support leg is flush with the top surface of the support, and the other side of the support leg is flush with the bottom surface of the support.

8. The battery support pad according to claim 1, characterized in that, The pad body and the support leg are made of stainless steel, aluminum, or aluminum alloy.

9. A button battery, characterized in that, include: The following components are arranged sequentially from bottom to top: a positive electrode shell, a first support pad, a positive electrode sheet, a separator, a negative electrode sheet, a second support pad, and a negative electrode shell, wherein the positive electrode shell contains an electrolyte; wherein the first support pad is configured as a battery support pad as described in any one of claims 1-8. Before the negative electrode shell and the positive electrode shell are press-fitted together: the first support pad supports the positive electrode sheet in the positive electrode shell at a height higher than the liquid level of the electrolyte; After the negative electrode shell and the positive electrode shell are pressed together: the support legs of the first support pad are folded or flattened on the pad body, and its top support surface and bottom support surface abut against the positive electrode sheet and the positive electrode shell respectively, and the electrolyte wets the positive electrode sheet.

10. The button battery according to claim 9, characterized in that, The positive electrode is configured as a single-sided electrode, and the active material is disposed on its upper surface.

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