Long-life wide-temperature battery having special-shaped ring

Abstract

A long-life wide-temperature battery having a special-shaped ring, characterized by comprising a negative electrode cap (1), a positive electrode shell (2), a sealing ring (3), a positive electrode (4), a separator (5), a negative electrode (6), and an electrolyte. The sealing ring (3) sealingly connects the negative electrode cap (1) and the positive electrode shell (2), so that the negative electrode cap (1) and the positive electrode shell (2) form a sealed cavity, and the positive electrode (4), the separator (5), the negative electrode (6) and the electrolyte are provided in the sealed cavity. The battery further comprises a special-shaped ring (7) provided in the positive electrode shell (2). The special-shaped ring (7) comprises a bottom wall (8) and a side wall (9), the bottom wall (8) is placed on the inner wall of the positive electrode shell (2), the side wall (9) forms an inner ring, the positive electrode (4) is located in the inner ring, and the thickness of the bottom wall (8) is greater than that of the side wall (9).

Description

A long-life, wide-temperature battery with an irregularly shaped ring Technical Field

[0001] This invention relates to the field of batteries, and more particularly to a long-life, wide-temperature battery with an irregularly shaped ring. Background Technology

[0002] Due to their lightweight and small size, button batteries are widely used as power sources in various microelectronic products. Typically, a button battery consists of a positive electrode casing, a negative electrode cap, and a cell and electrolyte located in a sealed cavity formed between the positive electrode casing and the negative electrode cap. The positive electrode, separator, and negative electrode are stacked in sequence and then folded or not to form the cell.

[0003] However, during the encapsulation process and use, the positive electrode casing and negative electrode cap of the aforementioned button cells often experience relative displacement and leakage between the positive electrode and the casing. This not only reduces the overall stability and leak-proof performance of the battery but also shortens its lifespan. Furthermore, the aforementioned button cells typically use a cylindrical positive electrode. If the cylindrical positive electrode expands during use, its end face will compress the separator, easily leading to separator rupture, which also shortens the battery's lifespan.

[0004] Summary of the Invention

[0005] In view of this, embodiments of the present invention provide a long-life, wide-temperature battery with an irregularly shaped ring, which can effectively improve the battery's sealing and current collection efficiency, thereby achieving a long storage life and a wider operating temperature range.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] In a first aspect, embodiments of the present invention provide a long-life, wide-temperature battery with a shaped ring, comprising a negative electrode cap, a positive electrode shell, a sealing ring, a positive electrode, a separator, a negative electrode, and an electrolyte. The sealing ring seals and connects the negative electrode cap and the positive electrode shell, forming a sealed cavity. The positive electrode, separator, negative electrode, and electrolyte are disposed within the sealed cavity. The coin cell further includes a shaped ring disposed within the positive electrode shell. The shaped ring includes a bottom wall and a side wall. The bottom wall is placed on the inner wall of the positive electrode shell, and the side wall forms an inner ring. The positive electrode is located within the inner ring, and the thickness of the bottom wall is less than the thickness of the side wall.

[0008] Preferably, the outer diameter of the bottom wall is adapted to the inner diameter of the positive electrode shell.

[0009] Preferably, the thickness of the bottom wall is 0.15-5 mm.

[0010] Preferably, the sidewall thickness is 0.05-0.2 mm, and the ratio of the bottom wall thickness to the sidewall thickness is greater than or equal to 2.

[0011] Preferably, the outer side of the negative electrode cover forms a notch with the sealing ring, and the notch is provided with sealant.

[0012] Preferably, the negative electrode cover includes a first bent portion, a connecting portion, and a second bent portion, wherein the first bent portion, the connecting portion, and the sealing ring form a notch.

[0013] Preferably, the second bent portion is a straight edge.

[0014] Preferably, the notch is at least one of a right angle, a rounded corner, or a hypotenuse.

[0015] Preferably, a sealant is provided inside the positive electrode housing.

[0016] Preferably, the bottom of the positive electrode shell has a flat-concave structure.

[0017] Secondly, embodiments of the present invention also provide a long-life, wide-temperature battery with a shaped ring, comprising a negative electrode cap, a positive electrode shell, a sealing ring, a positive electrode, a separator, a negative electrode, and an electrolyte. The sealing ring seals and connects the negative electrode cap and the positive electrode shell, forming a sealed cavity. The positive electrode, separator, negative electrode, and electrolyte are disposed within the sealed cavity. The coin cell also includes a shaped ring disposed within the positive electrode shell. The shaped ring includes an inner sidewall, a positioning portion, and an outer sidewall. The inner sidewall forms an inner ring, and the positive electrode is located within the inner ring. The positioning portion connects to both the inner sidewall and the outer sidewall. The outer sidewall, the positioning portion, and the bottom wall of the positive electrode shell form a liquid storage cavity.

[0018] Preferably, the outer diameter of the outer side wall is adapted to the inner diameter of the positive electrode shell.

[0019] Preferably, the thickness of the inner sidewall is 0.05-0.2 mm, and the thickness of the positioning part is 0.05-5 mm.

[0020] Preferably, the thickness of the outer wall does not exceed the length of the positioning part, and the height of the liquid storage cavity is lower than the height of the outer wall.

[0021] Preferably, the outer side of the negative electrode cover forms a notch with the sealing ring, and the notch is provided with sealant.

[0022] Preferably, the negative electrode cover includes a first bent portion, a connecting portion, and a second bent portion, wherein the first bent portion, the connecting portion, and the sealing ring form a notch.

[0023] Preferably, the second bent portion is a straight edge.

[0024] Preferably, the notch is at least one of a right angle, a rounded corner, or a hypotenuse.

[0025] Preferably, a sealant is provided inside the positive electrode housing.

[0026] Preferably, the bottom of the positive electrode shell has a flat-concave structure.

[0027] This invention provides a long-life, wide-temperature battery with a shaped ring, comprising a negative electrode cap, a positive electrode housing, a sealing ring, a positive electrode, a separator, a negative electrode, and an electrolyte. The sealing ring seals the negative electrode cap and the positive electrode housing, forming a sealed cavity. The positive electrode, separator, negative electrode, and electrolyte are disposed within the sealed cavity. The coin cell also includes a shaped ring disposed within the positive electrode housing. The shaped ring includes a bottom wall and a side wall. The bottom wall is placed on the inner wall of the positive electrode housing, and the side wall forms an inner ring. The positive electrode is located within the inner ring, and the thickness of the bottom wall is greater than the thickness of the side wall. This ring significantly improves the battery's sealing performance and automation level. Specifically:

[0028] 1) With a fixed total height of the negative electrode casing, increasing the thickness of the bottom wall can reduce the size of the sealing ring, because the sealing ring is generally made of plastic and has poor support strength. This invention increases the support strength and improves the battery sealing performance by increasing the size of the bottom wall.

[0029] 2) The thickened bottom wall design can improve the flatness of the bottom surface of the irregular ring, thereby improving the battery sealing performance;

[0030] 3) The thickened bottom wall design increases the deformation resistance of irregular rings, making them suitable for high-speed automated production and reducing carbon emissions.

[0031] This invention provides a long-life, wide-temperature battery with an irregularly shaped liquid storage positioning ring, comprising a negative electrode cap, a positive electrode shell, a sealing ring, a positive electrode, a separator, a negative electrode, and an electrolyte. The sealing ring seals and connects the negative electrode cap and the positive electrode shell, forming a sealed cavity. The positive electrode, separator, negative electrode, and electrolyte are disposed within the sealed cavity. The coin cell further includes an irregularly shaped liquid storage positioning ring disposed within the positive electrode shell. The irregularly shaped liquid storage positioning ring includes an inner wall, a positioning portion, and an outer wall. The inner wall forms an inner ring, and the positive electrode is located within the inner ring. The positioning portion connects to both the inner and outer walls. The outer wall, the positioning portion, and the bottom wall of the positive electrode shell form a liquid storage cavity. Thus, the irregularly shaped liquid storage positioning ring significantly improves the battery's liquid storage function and the automation level of high-speed production. Specifically:

[0032] 1) The positive electrode is fixed on the inner wall to increase the current collection effect;

[0033] 2) The design of the liquid storage chamber increases the liquid storage space and increases the amount of electrolyte inside the battery;

[0034] 3) During high-speed automated production, the irregularly shaped liquid storage positioning rings push against each other. Because the outer wall height is high enough, the irregularly shaped liquid storage positioning rings will not stack on each other, which increases the deformation resistance of the irregularly shaped liquid storage positioning rings, making them suitable for high-speed automated production and reducing carbon emissions.

[0035] 4) With a fixed total height of the negative electrode casing, increasing the height of the second sidewall can reduce the size of the sealing ring. Since the sealing ring is generally made of plastic, its support strength is poor. This invention increases the support strength and improves the battery sealing performance by increasing the height of the second sidewall. Attached Figure Description

[0036] Figure 1 is a schematic diagram of a long-life, wide-temperature battery with an irregularly shaped ring according to an embodiment of the present invention.

[0037] Figure 2 is a schematic diagram of the dimensions of the irregular ring in one embodiment of the present invention;

[0038] Figure 3 is a schematic diagram of a long-life, wide-temperature battery with an irregularly shaped ring according to another embodiment of the present invention;

[0039] Figure 4 is a schematic diagram of the dimensions of the irregular ring in another embodiment of the present invention;

[0040] Figure 5 is a schematic diagram of the irregular ring structure in one embodiment of the present invention;

[0041] Figure 6 is a schematic diagram of the irregular ring structure in another embodiment of the present invention;

[0042] Figure 7 is a schematic diagram of the notch of a long-life wide-temperature battery with an irregular ring in one embodiment of the present invention;

[0043] Figure 8 is a schematic diagram of the negative electrode cover of a long-life, wide-temperature battery with an irregularly shaped ring according to an embodiment of the present invention.

[0044] Figure 9 is a schematic diagram of a flat-concave shell in one embodiment of the present invention;

[0045] Figure 10 is a schematic diagram of a flat-concave shell in another embodiment of the present invention.

[0046] Among them, the negative electrode cover 1, the positive electrode shell 2, the sealing ring 3, the positive electrode 4, the diaphragm 5, the negative electrode 6, the irregular ring 7, the bottom wall 8, the side wall 9, the notch 10, the first bend 11, the connecting part 12, the second bend 13, the inner side wall 14, the positioning part 15, and the outer side wall 16. Detailed Implementation

[0047] To better illustrate this embodiment, some components in the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable that those skilled in the art will find that some well-known structures and their descriptions may be omitted in the drawings. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The technical solution of this invention will be further described below with reference to the accompanying drawings and embodiments.

[0048] Referring to Figure 1, a long-life, wide-temperature battery with a shaped ring according to an embodiment of the present invention includes a negative electrode cap, a positive electrode shell, a sealing ring, a positive electrode, a separator, a negative electrode, and an electrolyte. The sealing ring seals and connects the negative electrode cap and the positive electrode shell, forming a sealed cavity. The positive electrode, separator, negative electrode, and electrolyte are disposed within the sealed cavity. The coin cell also includes a shaped ring disposed within the positive electrode shell. The shaped ring includes a bottom wall and a side wall. The bottom wall is placed on the inner wall of the positive electrode shell, and the side wall forms an inner ring. The positive electrode is located in the inner ring, and the thickness of the bottom wall is greater than the thickness of the side wall.

[0049] Here, the positive electrode may have a chamfer only on its upper end face or no chamfer on either the upper or lower end face. The irregularly shaped ring may be fixedly connected to the positive electrode housing, and the positive electrode may be fixedly connected to or integrally formed with the irregularly shaped ring.

[0050] Here, the positive electrode casing can be either a flat casing or a flat-concave casing, depending on the specific battery model.

[0051] Here, the negative electrode cover can be a straight-edged cover or a flip-up cover, depending on the specific battery model.

[0052] Thus, with a fixed total height of the negative electrode casing, increasing the bottom wall thickness can reduce the size of the sealing ring. Since the sealing ring is generally made of plastic, its support strength is relatively poor. This invention increases the support strength by thickening the bottom wall, thereby improving the battery's sealing performance. The thickened bottom wall design can improve the flatness of the bottom surface of the irregular ring, thereby improving the battery's sealing performance. The thickened bottom wall design can also increase the irregular ring's resistance to deformation, making it suitable for high-speed automated production and reducing carbon emissions.

[0053] In one embodiment, the outer diameter of the bottom wall is adapted to the inner diameter of the positive electrode housing.

[0054] The positive electrode portion is located in the inner ring of the irregular ring, which can be understood as the positive electrode being located in the inner ring of the irregular ring and protruding out of the irregular ring.

[0055] Here, since the bottom wall and side wall are not easily deformed when subjected to pressure, it can be ensured that there is no relative displacement between the irregular ring and the positive electrode shell, that is, it can be ensured that there is no relative displacement between the positive electrode, the irregular ring and the positive electrode shell, thereby improving the overall stability and quality of the battery.

[0056] Referring to Figure 2, in one embodiment, the thickness of the bottom wall is 0.15-5 mm.

[0057] In one embodiment, the sidewall thickness is 0.05-0.2 mm, wherein the ratio of the bottom wall thickness to the sidewall thickness is greater than or equal to 2.

[0058] Thus, in the process of assembly line production, the thickened bottom wall design can increase the deformation resistance of irregular rings, making them suitable for high-speed automated production and reducing carbon emissions.

[0059] Please refer to Figure 7. In one embodiment, a notch is formed between the outer side of the negative electrode cover and the sealing ring, and the notch is provided with sealant.

[0060] Thus, on the one hand, the negative electrode cover is replaced by a straight-edged cover instead of the previous flip-edge cover, which has a better support structure, prevents cutting the plastic, and reduces the plastic deformation of the metal; on the other hand, the notch design has an adhesive application area, which improves the plastic deformation of the sealing ring during sealing. After sealing, it compensates for the deformation rebound of the sealing ring and the negative electrode cover, and improves the sealing effect of the negative electrode cover and the sealing ring.

[0061] Referring to Figure 8, in one embodiment, the negative electrode cover includes a first bent portion, a connecting portion, and a second bent portion, wherein the first bent portion, the connecting portion, and the sealing ring form a notch.

[0062] Here, the first bend, the connecting part, and the sealing ring form a notch. The sealing ring is also applied to the connecting part and the first bend. The notch generally does not extend to the second bend, otherwise the sealing ring will easily fall off the negative electrode cover.

[0063] In one embodiment, the second bent portion is a straight edge.

[0064] Here, the negative electrode cover is replaced by a straight-edged cover instead of the previous flip-edge cover, which has a better support structure, prevents cutting the plastic, and reduces metal plastic deformation.

[0065] In one embodiment, the notch is at least one of a right angle, a rounded corner, or a hypotenuse.

[0066] Of course, the notch can also be other shapes; the shapes described above are simply easier to manufacture. During manufacturing, a corresponding injection mold core can be set to create the notch at the appropriate position during injection.

[0067] In one embodiment, a sealant is provided inside the positive electrode housing.

[0068] Here, sealant is applied inside the positive electrode casing. After sealing, it compensates for the deformation and rebound of the plastic and the positive electrode casing, and improves the sealing effect between the positive electrode casing and the plastic.

[0069] In one embodiment, the bottom of the positive electrode housing has a flat-concave structure.

[0070] Here, the positive electrode casing is a flat-concave shell, which increases the battery's load voltage and prevents the battery from experiencing low load voltage.

[0071] Specifically, the concave-flat shell has a flat edge around its perimeter and a concave center. The concave portion transitions smoothly from the flat portion without any concave steps. Referring to Figures 9 and 10, the dimensional requirement for the concave-flat shell is: (Dd) / 2 > l.

[0072] Referring to Figure 3, this embodiment of the invention also provides a long-life, wide-temperature battery with a shaped ring, including a negative electrode cap, a positive electrode shell, a sealing ring, a positive electrode, a separator, a negative electrode, and an electrolyte. The sealing ring seals and connects the negative electrode cap and the positive electrode shell, forming a sealed cavity. The positive electrode, separator, negative electrode, and electrolyte are disposed within the sealed cavity. The coin cell also includes a shaped ring disposed within the positive electrode shell. The shaped ring includes an inner sidewall, a positioning portion, and an outer sidewall. The inner sidewall forms an inner ring, and the positive electrode is located within the inner ring. The positioning portion connects to both the inner sidewall and the outer sidewall. The outer sidewall, the positioning portion, and the bottom wall of the positive electrode shell form a liquid storage cavity.

[0073] Here, the inner wall can fix the positive electrode, the inner wall and the positioning part can position the sealing ring, and the positioning part and the outer wall can form a liquid storage cavity with the bottom wall of the positive electrode shell.

[0074] Here, the positive electrode casing can be either a flat casing or a flat-concave casing, depending on the specific battery model.

[0075] Here, the negative electrode cover can be a straight-edged cover or a flip-up cover, depending on the specific battery model.

[0076] Here, the positive electrode portion is located in the inner ring of the inner sidewall, which can be understood as the positive electrode being located in the inner ring of the irregular ring and protruding from the irregular ring.

[0077] Here, the positive electrode may have a chamfer only on its upper end face or no chamfer on either the upper or lower end face. The irregularly shaped ring may be fixedly connected to the positive electrode housing, and the positive electrode may be fixedly connected to or integrally formed with the irregularly shaped ring.

[0078] Thus, the irregularly shaped rings can significantly improve the battery's electrolyte storage function and the automation level of high-speed production. Specifically, the inner sidewall fixes the positive electrode, increasing the current collection effect; the design of the electrolyte storage cavity increases the storage space, increasing the amount of electrolyte inside the battery; during high-speed automated production, the irregularly shaped rings push against each other, and because the outer sidewall is high enough, it ensures that the irregularly shaped rings will not stack on each other, increasing the deformation resistance of the irregularly shaped rings, making them suitable for high-speed automated production and reducing carbon emissions; with a fixed total height of the negative electrode shell, increasing the height of the second sidewall can reduce the size of the sealing ring, because the sealing ring is generally made of plastic and has poor support strength. This invention increases the support strength by increasing the height of the second sidewall, thereby improving the battery's sealing performance.

[0079] In one embodiment, the outer diameter of the outer sidewall is adapted to the inner diameter of the positive electrode housing.

[0080] Here, the outer diameter of the outer side wall being matched with the inner diameter of the positive electrode shell means that the outer diameter of the outer side wall is tightly attached to the inner wall of the positive electrode shell. Since the inner side wall, the positioning part, and the outer side wall of the irregular ring are not easily deformed when subjected to pressure, it can ensure that there is no relative displacement between the irregular ring and the positive electrode shell. That is, it can ensure that there is no relative displacement between the positive electrode, the irregular ring, and the positive electrode shell, thereby improving the overall stability and quality of the battery.

[0081] In one embodiment, the thickness of the inner sidewall is 0.05-0.2 mm, and the thickness of the positioning part is 0.05-5 mm.

[0082] In one embodiment, the thickness of the outer wall does not exceed the length of the positioning portion, and the height of the liquid storage cavity is lower than the height of the outer wall.

[0083] Here, since the irregular ring includes an inner wall, a positioning part, and an outer wall, the thickness of the outer wall cannot exceed the length of the positioning part; otherwise, the liquid storage cavity would not exist. Similarly, the height of the liquid storage cavity cannot exceed the height of the outer wall; otherwise, there would be no positioning part. Referring to Figure 4, in one embodiment, the thickness of the inner wall is defined as *a*, the thickness of the positioning part as *b*, the height of the outer wall as *c*, and the height of the outer wall as *d*. The dimensions of *a* are 0.05-0.2 mm, *b* is 0.05-5 mm, *c* is 0.15-5 mm, and *d* is >0.3 mm. The length of the positioning part is generally not specifically defined and depends on the inner diameter of the inner wall and the size of the positive electrode.

[0084] Furthermore, referring to Figures 5 and 6, the angles of the inner sidewall and the positioning part can be either right angles or rounded corners.

[0085] It should be noted that the dimensions of the inner wall, outer wall, and positioning part are optimally defined based on the existing standard dimensions of button batteries, and structures exceeding the original dimensions are also within the scope of this invention.

[0086] Please refer to Figure 7. In one embodiment, a notch is formed between the outer side of the negative electrode cover and the sealing ring, and the notch is provided with sealant.

[0087] Thus, on the one hand, the negative electrode cover is replaced by a straight-edged cover instead of the previous flip-edge cover, which has a better support structure, prevents cutting the plastic, and reduces the plastic deformation of the metal; on the other hand, the notch design has an adhesive application area, which improves the plastic deformation of the sealing ring during sealing. After sealing, it compensates for the deformation rebound of the sealing ring and the negative electrode cover, and improves the sealing effect of the negative electrode cover and the sealing ring.

[0088] Referring to Figure 8, in one embodiment, the negative electrode cover includes a first bent portion, a connecting portion, and a second bent portion, wherein the first bent portion, the connecting portion, and the sealing ring form a notch.

[0089] Here, the first bend, the connecting part, and the sealing ring form a notch. The sealing ring is also applied to the connecting part and the first bend. The notch generally does not extend to the second bend, otherwise the sealing ring will easily fall off the negative electrode cover.

[0090] In one embodiment, the second bent portion is a straight edge.

[0091] Here, the negative electrode cover is replaced by a straight-edged cover instead of the previous flip-edge cover, which has a better support structure, prevents cutting the plastic, and reduces metal plastic deformation.

[0092] In one embodiment, the notch is at least one of a right angle, a rounded corner, or a hypotenuse.

[0093] Of course, the notch can also be other shapes; the shapes described above are simply easier to manufacture. During manufacturing, a corresponding injection mold core can be set to create the notch at the appropriate position during injection.

[0094] In one embodiment, a sealant is provided inside the positive electrode housing.

[0095] Here, sealant is applied inside the positive electrode casing. After sealing, it compensates for the deformation and rebound of the plastic and the positive electrode casing, and improves the sealing effect between the positive electrode casing and the plastic.

[0096] In one embodiment, the bottom of the positive electrode housing has a flat-concave structure.

[0097] Here, the positive electrode casing is a flat-concave shell, which increases the battery's load voltage and prevents the battery from experiencing low load voltage.

[0098] Specifically, the concave-flat shell has a flat edge around its perimeter and a concave center. The concave portion transitions smoothly from the flat portion without any concave steps. Referring to Figures 9 and 10, the dimensional requirement for the concave-flat shell is: (Dd) / 2 > l.

[0099] The present invention will be further illustrated below with specific embodiments. This embodiment uses the widely used CR2450 battery as an example.

[0100] Example 1

[0101] This embodiment takes a CR2032 button cell as an example. The size of the improved CR2032 button cell provided in this embodiment is basically the same as that of the conventional CR2032. The battery structure of this embodiment includes an irregularly shaped ring disposed in the positive electrode housing. The irregularly shaped ring includes a bottom wall and a side wall. The bottom wall is placed on the inner wall of the positive electrode housing, and the side wall forms an inner ring. The positive electrode is located in the inner ring, and the thickness of the bottom wall is greater than the thickness of the side wall. The outer side of the negative electrode cover forms a notch with the sealing ring, and the notch is provided with sealant.

[0102] Example 2

[0103] This embodiment uses a CR2032 coin cell as an example. The dimensions of the improved CR2032 coin cell provided in this embodiment are basically the same as those of the conventional CR2032. The battery structure of this embodiment includes an irregularly shaped ring disposed within the positive electrode housing. The irregularly shaped ring includes a bottom wall and a side wall. The bottom wall is placed on the inner wall of the positive electrode housing, and the side wall forms an inner ring. The positive electrode is located in the inner ring, and the thickness of the bottom wall is greater than the thickness of the side wall. It should be noted that the negative electrode cap is a standard negative electrode cap and does not have a notch for adhesive application.

[0104] Comparative Example 1

[0105] This embodiment takes a CR2032 button cell as an example. The size of the improved CR2032 button cell provided in this embodiment is basically the same as that of the conventional CR2032. The battery structure of this embodiment includes an irregularly shaped ring disposed in the positive electrode housing. The irregularly shaped ring includes a bottom wall and a side wall. The bottom wall is placed on the inner wall of the positive electrode housing, and the side wall forms an inner ring. It should be noted that the positive electrode is located in the inner ring, and the thickness of the bottom wall is equal to the thickness of the side wall.

[0106] (1) Constant resistance discharge test

[0107] Taking the CR2032 lithium manganese button battery as an example, it should be noted that the unit is mAh, which represents the battery capacity. The larger the value, the better the performance.

[0108] As can be seen from Table 1, on the one hand, under constant resistance discharge at a high temperature of 100℃, the battery discharge performance of Example 1 > Example 2 > Comparative Example 1, indicating that the battery sealing performance is also Example 1 > Example 2 > Comparative Example 1; on the other hand, under constant resistance discharge at a low temperature of -10℃, the performance of Example 1 ≈ Example 2 > Comparative Example 1, indicating that the irregular ring can increase the battery liquid storage capacity.

[0109] Table 1

[0110] (2) Leakage prevention performance test

[0111] It should be noted that the weight loss ratio represents the battery's leakage resistance; the lower the value, the better the performance.

[0112] Referring to Table 2, each embodiment and comparative example in this experiment was tested by comparing 8 batteries. Referring again to Table 2, through multiple sets of comparative experiments, it was found that after vacuum weight loss and high and low temperature cycling, the average weight loss ratio of Embodiment 1 and Embodiment 2 was reduced compared to Comparative Example 1, indicating that the irregular ring in the embodiments of the present invention can increase the battery's leak-proof performance; the weight loss ratio of Embodiment 1 was even smaller, indicating that the internal and external coating structure can also increase the battery's leak-proof performance.

[0113] Table 2

[0114] Example 3

[0115] This embodiment takes a CR2032 coin cell battery as an example. The size of the improved CR2032 coin cell battery provided in this embodiment is basically the same as that of the conventional CR2032. The battery structure of this embodiment includes an irregularly shaped ring disposed in the positive electrode housing. The irregularly shaped ring includes an inner sidewall, a positioning part, and an outer sidewall. The inner sidewall forms an inner ring, and the positive electrode is located in the inner ring. The positioning part is connected to the inner sidewall and the outer sidewall respectively. The outer sidewall, the positioning part, and the bottom wall of the positive electrode housing form a liquid storage cavity. The outer side of the negative electrode cover forms a notch with the sealing ring, and the notch is provided with sealant.

[0116] Example 4

[0117] This embodiment uses a CR2032 coin cell as an example. The dimensions of the improved CR2032 coin cell provided in this embodiment are basically the same as those of the conventional CR2032. The battery structure of this embodiment includes an irregularly shaped ring disposed within the positive electrode housing. The irregularly shaped ring includes an inner sidewall, a positioning part, and an outer sidewall. The inner sidewall forms an inner ring, and the positive electrode is located in the inner ring. The positioning part connects the inner sidewall and the outer sidewall respectively. The outer sidewall, the positioning part, and the bottom wall of the positive electrode housing form a liquid storage cavity. It should be noted that the negative electrode cap is a common negative electrode cap and does not have a notch for adhesive application.

[0118] Comparative Example 2

[0119] This embodiment takes a CR2032 button cell as an example. The size of the improved CR2032 button cell provided in this embodiment is basically the same as that of the conventional CR2032. The battery structure of this embodiment includes an irregularly shaped ring disposed in the positive electrode housing. The irregularly shaped ring includes a bottom wall and a side wall. The bottom wall is placed on the inner wall of the positive electrode housing, and the side wall forms an inner ring. It should be noted that the positive electrode is located in the inner ring, and the thickness of the bottom wall is equal to the thickness of the side wall.

[0120] (1) Constant resistance discharge test

[0121] Taking the CR2032 lithium manganese button battery as an example, it should be noted that the unit is mAh, which represents the battery capacity. The larger the value, the better the performance.

[0122] As can be seen from Table 3, on the one hand, under constant resistance discharge at a high temperature of 100℃, the battery discharge performance of Example 3 > Example 4 > Comparative Example 1, indicating that the battery sealing performance is also Example 3 > Example 4 > Comparative Example 2; on the other hand, under constant resistance discharge at a low temperature of -10℃, the performance of Example 3 ≈ Example 4 > Comparative Example 2, indicating that the irregular ring can increase the battery liquid storage capacity.

[0123] Table 3

[0124] (2) Leakage prevention performance test

[0125] It should be noted that the weight loss ratio represents the battery's leakage resistance; the lower the value, the better the performance.

[0126] Referring to Table 4, each embodiment and comparative example in this experiment was tested by comparing 8 batteries. Referring again to Table 2, through multiple sets of comparative experiments, it was found that after vacuum weight loss and high and low temperature cycling, the average weight loss ratio of Embodiments 3 and 4 was reduced compared to that of Comparative Example 2, indicating that the irregular ring in the embodiments of the present invention can increase the battery's leak-proof performance; the weight loss ratio of Embodiment 3 was even smaller, indicating that the internal and external coating structure can also increase the battery's leak-proof performance.

[0127] Table 4

[0128] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and scope of the present invention are included within the scope of protection of the present invention.

Claims

1. A long-life wide-temperature battery with a profile ring, characterized by, The button cell battery comprises a negative cover, a positive shell, a sealing ring, a positive electrode, a diaphragm, a negative electrode and an electrolyte, wherein the sealing ring is connected to the negative cover and the positive shell to form a sealed cavity, and the positive electrode, the diaphragm, the negative electrode and the electrolyte are arranged in the sealed cavity; the button cell battery further comprises a special-shaped ring arranged in the positive shell; the special-shaped ring comprises a bottom wall and a side wall, the bottom wall is arranged on the inner wall of the positive shell, the side wall forms an inner ring, the positive electrode is arranged in the inner ring, and the thickness of the bottom wall is greater than the thickness of the side wall.

2. The long life wide temperature battery with a profile ring of claim 1, wherein, The outer diameter of the bottom wall is matched with the inner diameter of the positive shell.

3. The long life wide temperature battery with a profile ring of claim 1, wherein, The thickness of the bottom wall is 0.15-5mm.

4. The long life wide temperature battery with a profile ring of claim 3, wherein, The thickness of the side wall is 0.05-0.2mm, and the ratio of the thickness of the bottom wall to the thickness of the side wall is greater than or equal to 2.

5. The long life wide temperature battery with a profile ring of claim 1, wherein, The outer side of the negative cover forms a gap with the sealing ring, and the gap is provided with sealing glue.

6. The long life, wide temperature battery with a profile ring of claim 5, wherein, The negative cover comprises a first bending part, a connecting part and a second bending part, and the first bending part, the connecting part and the sealing ring form a gap.

7. The long life, wide temperature battery with a profile ring of claim 6, wherein, The second bending part is a straight edge.

8. The long life wide temperature battery with a profile ring of claim 5, wherein, The gap is at least one of a right angle, a round angle and a bevel.

9. The long life, wide temperature battery with a profile ring of claim 1, wherein, The positive shell is provided with sealing glue.

10. The long life, wide temperature battery with a profile ring of claim 1, wherein, The bottom of the positive shell is a flat concave structure.

11. A long-life wide-temperature battery with a profile ring, characterized by, The button cell battery comprises a negative cover, a positive shell, a sealing ring, a positive electrode, a diaphragm, a negative electrode and an electrolyte, wherein the sealing ring is connected to the negative cover and the positive shell to form a sealed cavity, and the positive electrode, the diaphragm, the negative electrode and the electrolyte are arranged in the sealed cavity; the button cell battery further comprises a special-shaped ring arranged in the positive shell; the special-shaped ring comprises an inner side wall, a positioning part and an outer side wall, the inner side wall forms an inner ring, the positive electrode is arranged in the inner ring, the positioning part is connected to the inner side wall and the outer side wall respectively, and the outer side wall, the positioning part and the bottom wall of the positive shell form a liquid storage cavity.

12. The long life, wide temperature battery with a profile ring of claim 1, wherein, The outer diameter of the outer side wall is matched with the inner diameter of the positive shell.

13. The long life, wide temperature battery with a profile ring of claim 1, wherein, The thickness of the inner side wall is 0.05-0.2mm, and the thickness of the positioning part is 0.05-5mm.

14. The long life, wide temperature battery with a profile ring of claim 1, wherein, The thickness of the outer side wall is not more than the length of the positioning part, and the height of the liquid storage cavity is lower than the height of the outer side wall.

15. The long life, wide temperature battery with a profile ring of claim 1, wherein, The outer side of the negative cover forms a gap with the sealing ring, and the gap is provided with sealing glue.

16. The long life, wide temperature battery with a profile ring of claim 15, wherein, The negative cover comprises a first bending part, a connecting part and a second bending part, and the first bending part, the connecting part and the sealing ring form a gap.

17. The long life, wide temperature battery with a profile ring of claim 16, wherein, The second bending part is a straight edge.

18. The long life, wide temperature battery with a profile ring of claim 15, wherein, The gap is at least one of a right angle, a round angle and a bevel.

19. The long life, wide temperature battery with a profile ring of claim 1, wherein, The positive shell is provided with sealing glue.

20. The long life, wide temperature battery with a profile ring of claim 1, wherein, The bottom of the positive shell is a flat concave structure.

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