Button cell with good sealing performance

Abstract

The utility model discloses a button cell with good sealing performance, which comprises a positive pole shell, the inner side of the positive pole shell is fixedly connected with a sealing assembly, the sealing assembly comprises a sealing ring and a compression ring, the middle part of the surface of the positive pole shell is fixedly connected with a protection assembly, the protection assembly comprises a protection layer and a leakage-proof layer, and the leakage-proof layer is arranged on the surface of the positive pole shell. And the outer side of the positive electrode shell is fixedly connected with a protective ring, the top of a sealing ring is in lap joint with a negative electrode cover, and one side of the top of the negative electrode cover is fixedly connected with a sealing ring. According to the button cell with good sealing performance, the protective layer and the leakproof layer are respectively made of polyurethane and polyimide, both the protective layer and the leakproof layer have good corrosion resistance and can resist corrosion of chemical substances in the cell to the shell material, the service life of the cell is prolonged, and meanwhile, the protective layer and the leakproof layer can also be used as extra supports of the internal structure of the cell, so that the sealing performance of the cell is improved. And internal liquid movement caused by vibration or impact is reduced, so that the risk of leakage is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing and leak-proofing of button batteries, in particular to a button battery with good sealing performance. Background Art

[0002] Button batteries, with their compact size and stable power supply, have become an indispensable power source for products such as electronic watches, remote controls, and small electronic medical devices. Based on a disc-shaped structure, they generate electricity through an internal chemical reaction. Common types include lithium manganese oxide, silver oxide, and alkaline manganese. The core advantage of button batteries lies in their high energy density and long shelf life, enabling them to provide long-lasting power within limited space.

[0003] However, due to their size limitations, extremely high requirements are placed on the sealing and material properties of the battery to ensure that no electrolyte leakage or gas escape occurs during use, thereby ensuring the stability and safety of the battery. In recent years, through technological innovations such as the use of more advanced sealing technologies, optimization of the battery's internal structure, and improvement of the corrosion resistance of materials, button batteries have achieved significant improvements in performance and reliability, meeting the stringent power requirements of modern electronic devices.

[0004] A button battery with good sealing performance disclosed in announcement number CN217956064U includes a top cover, a middle ring, and a bottom plate. The top cover is arranged above the bottom plate, the middle ring is located between the top cover and the bottom plate, a battery body is provided at the center of the bottom inner wall of the bottom plate, a ring is provided on the outside of the battery body, a plurality of micro springs are provided at equal angles around the axis at the top of the ring, a connecting rod is provided on the top of the micro spring, and a hole corresponding to the connecting rod is opened in the top cover, and the upper end of the connecting rod extends into the hole. A steel wire is connected to the top of the ring, and the upper end of the steel wire is connected to the top cover. This button battery with good sealing performance is provided with a top cover, a middle ring, and a bottom cover that cooperate to form the battery shell. When the top cover and the middle ring are set to slide, the upper end of the connecting rod is extended from the top cover through the cooperation of the connecting rod, the special-shaped hole, and the gasket, so that the special-shaped hole connects the inside of the shell with the outside world, so that the pressure of the button battery can be released, thereby achieving the effect of pressure relief and heat dissipation.

[0005] Although the above patent achieves the goal of extending the upper end of the connecting rod from the top cover through the combination of the connecting rod, the special-shaped hole and the gasket, so that the special-shaped hole connects the inside of the shell with the outside world, so that the pressure of the button battery can be released, thereby achieving the effect of pressure relief and heat dissipation; however, the device lacks an effective sealing component. When the device is in use, it is impossible to avoid the internal structure of the battery being disrupted due to external impact, which in turn causes the electrolyte to leak from the interface.

[0006] Therefore, it is necessary to invent a button battery with good sealing performance to solve the above problems. Utility Model Content

[0007] The technical problems to be solved by the present invention are as follows: to provide a button battery with high practicality, simple operation and good sealing performance, which solves the problem proposed in the above-mentioned background technology that there is a lack of effective sealing components, and when the device is in use, it is impossible to avoid the internal structure of the battery being disrupted due to external impact, thereby causing electrolyte leakage from the interface.

[0008] The purpose of the utility model can be achieved through the following technical solutions:

[0009] A button battery with good sealing performance includes a positive electrode shell, a sealing assembly fixedly connected to the inner side of the positive electrode shell, the sealing assembly including a sealing ring and a compression ring, a protective assembly fixedly connected to the middle of the surface of the positive electrode shell, the protective assembly including a protective layer and a leak-proof layer, a protective ring fixedly connected to the outer side of the positive electrode shell, a negative electrode cover overlapped on the top of the sealing ring, a sealing ring fixedly connected to one side of the top of the negative electrode cover, and a conductive contact point provided in the middle of the top surface of the negative electrode cover.

[0010] As a further solution of the present invention: the sealing ring is fixedly connected to the inner side of the positive electrode shell, and an annular placement groove is opened on the inner side of the sealing ring. A compression ring is fixedly connected to the inside of the annular placement groove. The compression ring is used to provide additional pressure to improve the sealing effect of the sealing ring.

[0011] As a further solution of the present invention: the protective layer is fixedly connected to the middle part of the surface of the positive electrode shell, and the inside of the protective layer is fixedly connected to a leak-proof layer. The protective layer is used to protect the internal structure of the battery and reduce the internal liquid movement caused by the impact of the vibration ring.

[0012] As a further solution of the present invention: the material of the protective layer is polyurethane, and the material of the leak-proof layer is polyimide. Both polyurethane and polyimide have good corrosion resistance, which can prevent the electrolyte from leaking and corroding the shell material.

[0013] As a further solution of the present invention: a positive manganese sheet is fixedly connected to the top of the positive electrode shell, and a diaphragm is fixedly connected to the top surface of the positive manganese sheet. The diaphragm is used to separate the positive manganese sheet and the negative zinc paste to avoid direct connection between the two.

[0014] As a further solution of the present invention: a negative electrode zinc paste is fixedly connected to the top surface of the diaphragm, and an electrolyte is placed between the negative electrode zinc paste and the diaphragm.

[0015] Beneficial effects of the utility model:

[0016] 1. Through the setting of the sealing assembly and the sealing ring, when the positive electrode shell and the negative electrode cover are fixed, the sealing ring is fixed inside the positive electrode shell. The sealing ring is used to seal the interface between the positive electrode shell and the negative electrode cover. The compression ring applies uniform pressure to make the sealing ring fit tightly with the negative electrode cover, so that it can increase the sealing effect of the sealing ring. At the same time, the sealing ring fixes the positive electrode shell and the negative electrode cover, further improving the sealing of the button battery, preventing air, moisture and other contaminants from entering the battery, and preventing the electrolyte from leaking from the interface.

[0017] 2. Through the setting of protective components, the materials of the protective layer and the leak-proof layer are polyurethane and polyimide respectively. Both have good corrosion resistance and can resist the corrosion of the outer shell material by the internal chemicals of the battery, thereby extending the service life of the battery. At the same time, the protective layer and the leak-proof layer can also serve as additional support for the internal structure of the battery, reducing the movement of internal liquid caused by vibration or impact, thereby reducing the risk of leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the battery structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the battery disassembly structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the battery protection component of the utility model;

[0022] Figure 4 This is a schematic structural diagram of the battery sealing assembly of the utility model;

[0023] Figure 5 It is a schematic diagram of the overall cross-sectional structure of the battery of the present utility model.

[0024] In the figure: 1. Positive electrode shell; 2. Sealing assembly; 201. Sealing ring; 202. Compression ring; 3. Protective assembly; 301. Protective layer; 302. Leakage-proof layer; 4. Protective ring; 5. Negative electrode cover; 6. Sealing ring; 7. Negative electrode zinc paste; 8. Conductive contact point; 9. Positive electrode manganese sheet; 10. Diaphragm. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figure 1-4 As shown, a button battery with good sealing performance includes a positive electrode shell 1, and a sealing component 2 is fixedly connected to the inner side of the positive electrode shell 1. The setting of the sealing component 2 further improves the sealing performance of the button battery, prevents air, moisture and other contaminants from entering the interior of the battery, and prevents the electrolyte from leaking from the interface. The sealing component 2 includes a sealing ring 201 and a compression ring 202. A protective component 3 is fixedly connected to the middle part of the surface of the positive electrode shell 1. The setting of the protective component 3 can serve as additional support for the internal structure of the battery, reducing the movement of internal liquid caused by vibration or impact, thereby reducing the risk of leakage. The protective component 3 includes a protective layer 301 and an anti-leakage layer 302. The outer side of the positive electrode shell 1 is fixedly connected to a protective ring 4. The top of the sealing ring 201 is overlapped and connected to the negative electrode cover 5. A sealing ring 6 is fixedly connected to one side of the top of the negative electrode cover 5. A conductive contact point 8 is provided in the middle of the top surface of the negative electrode cover 5.

[0027] like Figure 4 As shown, the sealing ring 201 is fixedly connected to the inner side of the positive electrode shell 1. An annular placement groove is opened on the inner side of the sealing ring 201. A compression ring 202 is fixedly connected to the inner side of the annular placement groove. The compression ring 202 is used to provide additional pressure to improve the sealing effect of the sealing ring 201.

[0028] like Figure 3 As shown, the protective layer 301 is fixedly connected to the middle part of the surface of the positive electrode shell 1, and the leak-proof layer 302 is fixedly connected to the inside of the protective layer 301. The protective layer 301 is used to protect the internal structure of the battery and reduce the internal liquid movement caused by the impact of the vibration ring;

[0029] like Figure 2 As shown, the material of the protective layer 301 is polyurethane, and the material of the anti-leakage layer 302 is polyimide. Both polyurethane and polyimide have good corrosion resistance, which prevents the electrolyte from leaking and corroding the shell material.

[0030] like Figure 2 As shown, a positive manganese sheet 9 is fixedly connected to the top of the positive electrode shell 1, and a diaphragm 10 is fixedly connected to the top surface of the positive manganese sheet 9. The diaphragm 10 is used to separate the positive manganese sheet 9 and the negative zinc paste 7 to prevent the two from being directly connected;

[0031] like Figure 2 As shown, the top surface of the diaphragm 10 is fixedly connected with the negative zinc paste 7, and the electrolyte is placed between the negative zinc paste 7 and the diaphragm 10;

[0032] The working principle of the present invention is as follows: when the positive electrode shell 1 and the negative electrode cover 5 are fixed, the sealing ring 201 is fixed inside the positive electrode shell 1. The sealing ring 201 is used to seal the interface between the positive electrode shell 1 and the negative electrode cover 5. The compression ring 202 applies uniform pressure to make the sealing ring 201 fit tightly with the negative electrode cover 5, so that it can increase the sealing effect of the sealing ring 201. At the same time, the sealing ring 6 fixes the positive electrode shell 1 and the negative electrode cover 5, further improving the sealing of the button battery, preventing air, moisture and other pollutants from entering the battery, and preventing the electrolyte from leaking from the interface. Secondly, the materials of the protective layer 301 and the leak-proof layer 302 are polyurethane and polyimide respectively, both of which have good corrosion resistance and can resist the corrosion of the outer shell material by the internal chemical substances of the battery, thereby extending the service life of the battery. At the same time, the protective layer 301 and the leak-proof layer 302 can also serve as additional support for the internal structure of the battery, reducing the movement of internal liquid caused by vibration or impact, thereby reducing the risk of leakage.

[0033] The above describes an embodiment of the present invention in detail. However, the above content is only a preferred embodiment of the present invention and should not be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent application of the present invention.

Claims

1. A button battery with good sealing performance, comprising a positive electrode shell (1), characterized in that: The inner side of the positive electrode shell (1) is fixedly connected to a sealing assembly (2), the sealing assembly (2) comprising a sealing ring (201) and a compression ring (202), the middle portion of the surface of the positive electrode shell (1) is fixedly connected to a protective assembly (3), the protective assembly (3) comprising a protective layer (301) and a leak-proof layer (302), the outer side of the positive electrode shell (1) is fixedly connected to a protective ring (4), the top of the sealing ring (201) is overlapped and connected to a negative electrode cover (5), a sealing ring (6) is fixedly connected to one side of the top of the negative electrode cover (5), and a conductive contact point (8) is provided in the middle portion of the top surface of the negative electrode cover (5).

2. A button battery with good sealing performance according to claim 1, characterized in that: The sealing ring (201) is fixedly connected to the inner side of the positive electrode shell (1); an annular placement groove is provided on the inner side of the sealing ring (201); and a compression ring (202) is fixedly connected to the interior of the annular placement groove.

3. A button battery with good sealing performance according to claim 1, characterized in that: The protective layer (301) is fixedly connected to the middle portion of the surface of the positive electrode shell (1), and the interior of the protective layer (301) is fixedly connected to a leak-proof layer (302).

4. A button battery with good sealing performance according to claim 3, characterized in that: The material of the protective layer (301) is polyurethane, and the material of the anti-leakage layer (302) is polyimide.

5. The button battery with good sealing performance according to claim 1, characterized in that: A positive manganese sheet (9) is fixedly connected to the top of the positive electrode shell (1), and a diaphragm (10) is fixedly connected to the top surface of the positive manganese sheet (9).

6. A button battery with good sealing performance according to claim 5, characterized in that: The top surface of the diaphragm (10) is fixedly connected with a negative electrode zinc paste (7), and an electrolyte is placed between the negative electrode zinc paste (7) and the diaphragm (10).

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