Button cell structure

Abstract

The utility model relates to the technical field of button cells, and discloses a structure of a button cell. The lithium ion battery comprises a positive pole shell and a negative pole cover, a positive pole material, a diaphragm and a negative pole material are sequentially arranged in the positive pole shell and the negative pole cover from bottom to top, an inner ring groove is formed in the inner wall of the positive pole shell, and a sealing ring is arranged on the negative pole cover in a sleeved mode. The edge of the negative electrode cover and the sealing ring extend into the inner ring groove and are in close contact with the inner wall of the inner ring groove, and the positive electrode shell is sleeved with an outer hoop sleeve. According to the utility model, when the positive pole shell and the negative pole cover of the button battery are combined and sealed, the error-tolerant rate is higher, and the probability of defective products is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of button batteries, in particular to a structure of a button battery. Background Art

[0002] A button battery, also known as a button cell, is a battery that is shaped like a small button and is generally used in small or micro electronic products. Its outer shell is mainly divided into two parts: the positive electrode shell and the negative electrode cover, while the interior contains positive electrode materials, negative electrode materials, and a diaphragm. At present, the positive electrode shell and the negative electrode cover of button batteries are mainly connected by rolling, and a sealing roll is placed at the rolling point to ensure the sealing of the button battery.

[0003] When processing button batteries, it is necessary to first fill the positive electrode shell with materials, then place the sealing ring and cover the negative electrode cover, and finally roll up the edges of the positive electrode shell and the negative electrode cover to complete the sealing work between the positive electrode shell and the negative electrode cover. However, this rolling-up clamping method not only has high requirements on the processing equipment, but also has precise standards for the alignment of the negative electrode cover and the positive electrode shell. Even if there is a slight deviation between the positive electrode shell and the negative electrode cover, defects will appear when rolling up the edges of the two, affecting the sealing of the button battery, so that the existing button battery structure has a high defective rate during production. Therefore, it is necessary to propose a button battery structure. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a button battery structure.

[0005] The utility model adopts the following technical scheme to achieve: a positive electrode shell and a negative electrode cover, wherein positive electrode materials, a diaphragm and negative electrode materials are arranged in sequence from bottom to top in the positive electrode shell and the negative electrode cover, an inner ring groove is arranged on the inner wall of the positive electrode shell, a sealing ring is sleeved on the negative electrode cover, an edge of the negative electrode cover and the sealing ring extend into the inner ring groove and are in close contact with the inner wall of the inner ring groove, and an outer hoop sleeve is sleeved on the positive electrode shell.

[0006] As a further improvement of the above solution, the middle portion of the positive electrode shell is in a protruding shape, and the protruding portion at the bottom of the positive electrode shell extends outside the outer hoop.

[0007] As a further improvement of the above solution, the middle part of the negative electrode cover is protruding, and the edge part thereof is thickened. A limiting annular groove is provided on the negative electrode cover, and the sealing ring is located in the limiting annular groove.

[0008] As a further improvement of the above solution, the inner edge of the positive electrode shell is of an expanded shape, which is inclined from top to bottom and from outside to inside.

[0009] As a further improvement of the above solution, a plurality of expansion slits are provided on the edge of the positive electrode shell, and the plurality of expansion slits are distributed in a ring shape.

[0010] As a further improvement of the above solution, an annular locking protrusion is provided in the outer hoop sleeve, an outer ring groove is provided on the positive electrode shell, and the annular locking protrusion extends into the outer ring groove and fits with the inner wall of the outer ring groove.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model uses the inner ring groove to enable the negative electrode cover to be directly clamped onto the positive electrode shell by pressing. Compared with the traditional roll-up clamping structure, it can improve the fault tolerance and reduce the probability of defective products while ensuring the sealing. The outer hoop can enhance the sealing of the button battery without affecting the normal use of the button battery, solve the problem of expansion seams affecting the sealing, and at the same time protect the button battery and improve the strength of the button battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an overall diagram showing the structure of the button battery of the utility model;

[0014] Figure 2 This is a disassembled display diagram of the structure of the button battery of the utility model;

[0015] Figure 3 It is a disassembled cross-sectional view showing the structure of the button battery of the utility model;

[0016] Figure 4 This is a front view and cross-sectional view showing the structure of the button battery of the utility model;

[0017] Figure 5 for Figure 4 A magnified structural display of part A.

[0018] Description of main symbols:

[0019] 1. Positive electrode shell; 2. Negative electrode cover; 3. Positive electrode material; 4. Diaphragm; 5. Negative electrode material; 6. Limiting ring groove; 7. Inner ring groove; 8. Sealing ring; 9. Outer hoop; 10. Annular clamping protrusion; 11. Outer ring groove. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0021] Please combine Figures 1 to 5The structure of the button battery of this embodiment includes: a positive electrode shell 1 and a negative electrode cover 2, wherein a positive electrode material 3, a diaphragm 4 and a negative electrode material 5 are arranged in the positive electrode shell 1 and the negative electrode cover 2 from bottom to top, an inner ring groove 7 is arranged on the inner wall of the positive electrode shell 1, a sealing ring 8 is sleeved on the negative electrode cover 2, the edge of the negative electrode cover 2 and the sealing ring 8 extend into the inner ring groove 7 and are in close contact with the inner wall of the inner ring groove 7, and an outer hoop 9 is sleeved on the positive electrode shell 1.

[0022] The middle portion of the positive electrode shell 1 is in a protruding shape, and the protruding portion at the bottom of the positive electrode shell 1 extends outside the outer hoop 9 .

[0023] Through the above technical solution, the protruding part at the bottom of the positive electrode shell 1 ensures that after the outer hoop 9 is installed on the outer shell of the button battery, the outer hoop 9 will not restrict the contact between the positive electrode of the button battery and the guide piece in the battery slot.

[0024] The middle part of the negative electrode cover 2 is in a protruding shape, and the edge part thereof is thickened. A limiting annular groove 6 is provided on the negative electrode cover 2 , and a sealing ring 8 is located in the limiting annular groove 6 .

[0025] Through the above technical solution, the protruding design of the negative electrode cover 2 allows the negative electrode of the button battery to better contact with the guide plate on the battery slot, and the thickening treatment of the edge of the negative electrode cover 2 makes the entire negative electrode cover 2 stronger, which can be inserted into the positive electrode shell 1 without deformation after being pressed, and the limiting annular groove 6 is mainly used to set and limit the sealing ring 8.

[0026] The inner edge of the positive electrode shell 1 is of an expanded shape, which is inclined from top to bottom and from outside to inside.

[0027] Through the above technical solution, the expanded inclined shape of the top edge of the positive electrode shell 1 enables the negative electrode cover 2 to be smoothly inserted into the inner ring groove 7 along the slope after being pressed.

[0028] A plurality of expansion slits are provided on the edge of the positive electrode shell 1 , and the plurality of expansion slits are distributed in a ring shape.

[0029] Through the above technical solution, the expansion seam enables the shell opening of the positive electrode shell 1 to expand adaptively after being squeezed by the negative electrode cover 2, thereby avoiding deformation or cracking after being squeezed.

[0030] An annular locking protrusion 10 is provided inside the outer hoop 9 , an outer annular groove 11 is provided on the positive electrode shell 1 , and the annular locking protrusion 10 extends into the outer annular groove 11 and fits with the inner wall of the outer annular groove 11 .

[0031] Through the above technical solution, the annular clamping protrusion 10 cooperates with the outer ring groove 11 to not only allow the outer hoop 9 to be stably clamped on the positive electrode shell 1, but also ensure the sealing of the positive electrode shell 1, solving the problem that the expansion seam affects the sealing of the button battery.

[0032] The implementation principle of the structure of a button battery in the embodiment of the present application is:

[0033] The first step: when making a button battery, the positive electrode material 3, the diaphragm 4 and the negative electrode material 5 are filled into the positive electrode shell 1 in sequence, and then the negative electrode cover 2 is placed on the top of the positive electrode shell 1, and pressure is applied to the negative electrode cover 2, so that the negative electrode cover 2 together with the sealing ring 8 on the negative electrode cover 2 is inserted into the inner ring groove 7 on the positive electrode shell 1, and then the sealed positive electrode shell 1 and negative electrode cover 2 are placed on the outer hoop 9, and pressure is applied to the sealed positive electrode shell 1 and negative electrode cover 2, so that the negative electrode cover 2 is inserted into the outer hoop 9, at this time, the annular clamping protrusion 10 in the outer hoop 9 is inserted into the outer ring groove 11 on the positive electrode shell 1, thereby completing the production of the entire button battery, so that the fault tolerance of the sealing work of the button battery is greatly improved, thereby reducing the probability of defective products in the sealing process.

[0034] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A structure of a button battery, comprising: A positive electrode shell and a negative electrode cover, wherein positive electrode materials, a diaphragm and negative electrode materials are arranged in sequence from bottom to top in the positive electrode shell and the negative electrode cover, characterized in that an inner ring groove is arranged on the inner wall of the positive electrode shell, a sealing ring is sleeved on the negative electrode cover, the edge of the negative electrode cover and the sealing ring extend into the inner ring groove and are in close contact with the inner wall of the inner ring groove, and an outer hoop is sleeved on the positive electrode shell.

2. The structure of the button battery according to claim 1, characterized in that: The middle part of the positive electrode shell is in a protruding shape, and the protruding part at the bottom of the positive electrode shell extends outside the outer hoop sleeve.

3. The structure of the button battery according to claim 1, characterized in that: The middle part of the negative electrode cover is in a protruding shape, and the edge part thereof is thickened. A limiting annular groove is provided on the negative electrode cover, and the sealing ring is located in the limiting annular groove.

4. The structure of the button battery according to claim 1, characterized in that: The inner edge of the positive electrode shell is of an expanded shape, and is inclined from top to bottom and from outside to inside.

5. The structure of the button battery according to claim 1, characterized in that: The edge of the positive electrode shell is provided with a plurality of expansion slits, and the plurality of expansion slits are distributed in a ring shape.

6. The structure of the button battery according to claim 1, characterized in that: An annular clamping protrusion is arranged inside the outer hoop sleeve, an outer annular groove is arranged on the positive electrode shell, and the annular clamping protrusion extends into the outer annular groove and fits with the inner wall of the outer annular groove.

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