Novel button type lithium battery

Abstract

The novel button type lithium battery comprises an anode shell, a cathode shell, a battery cell, a top cover, a supporting plate, a clamping ring and a bottom pad, the cathode shell is provided with a containing cavity with an upward opening, the bottom pad, the battery cell and the anode shell are sequentially arranged in the containing cavity from bottom to top, the diameter of the anode shell is smaller than that of the cathode shell, and the bottom pad is arranged in the containing cavity. The clamping ring is arranged around the periphery of the positive pole shell, the supporting plate is of an annular structure and covers the positive pole shell around the boss, a plurality of convex balls used for supporting are arranged on the supporting plate in an array mode, the top cover is of an annular structure and covers the supporting plate and the clamping ring, and the top cover, the clamping ring and the supporting plate are all made of insulating materials. The structure stability can be improved, and liquid leakage is avoided.

Description

Technical Field

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

[0002] Button batteries, also known as button batteries, refer to batteries with an appearance like a small button. Generally speaking, they are larger in diameter and thinner in thickness. Button batteries are classified according to their appearance. The corresponding battery classifications include cylindrical batteries, square batteries, and special-shaped batteries. Button batteries are also divided into two categories: chemical batteries and physical batteries. Chemical batteries are the most commonly used. They are composed of an anode (positive electrode), a cathode (negative electrode), and its electrolyte.

[0003] The conductive shell of existing button batteries is mostly directly connected to the battery cell, lacking a supporting structure to resist pressure, resulting in poor pressure resistance and fragile connections between components. When squeezed or collided, deformation and leakage will occur. Therefore, it is necessary to design a new button-type lithium battery that can increase structural stability and avoid leakage. Utility Model Content

[0004] The utility model aims to provide a novel button-type lithium battery.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A novel button-type lithium battery comprises a positive electrode shell, a negative electrode shell, a battery cell, a top cover, a support plate, a snap ring and a bottom pad, wherein the negative electrode shell is provided with a receiving cavity with an opening facing upward, and the bottom pad, the battery cell and the positive electrode shell are sequentially arranged in the receiving cavity from bottom to top, the diameter of the positive electrode shell is smaller than the diameter of the negative electrode shell, and a boss is provided, the snap ring is arranged around the outer circumference of the positive electrode shell, the support plate is an annular structure and is arranged around the boss cover on the positive electrode shell, a plurality of convex balls for support are arranged in an array on the support plate, the top cover is an annular structure and is covered on the support plate and the snap ring, and the top cover, the snap ring and the support plate are respectively made of insulating materials.

[0007] Furthermore, a threaded structure is provided on the outer side of the clamping ring, and the positive electrode shell and the top cover are provided with a threaded structure which is threadedly mounted and fixed with the clamping ring.

[0008] Furthermore, the top cover is provided with an annular groove matched with the clamping ring at the bottom, and the threaded structure is arranged on the inner wall of the annular groove.

[0009] Furthermore, the top cover is provided with a recessed portion surrounding the boss, and an isolation plate is installed in the recessed portion. The isolation plate is an annular structure, and the inner side of the isolation plate is tightly fitted with the boss.

[0010] Furthermore, the isolation plate is provided with a sealing ring on its inner side which fits tightly with the boss.

[0011] Furthermore, the isolation plate is adhered to the recess by glue.

[0012] Furthermore, a threaded structure is provided on the inner wall of the recess, and a threaded structure for threaded installation of the recess is provided on the outer side of the isolation plate.

[0013] Furthermore, the isolation plate is made of insulating material.

[0014] Furthermore, a circular groove is provided at the bottom of the negative electrode shell, and an annular groove surrounds the outer side of the circular groove.

[0015] After adopting the above technical solution, the utility model has the following advantages compared with the background technology:

[0016] 1. The utility model supports the battery cell through the bottom pad to prevent the negative electrode shell from deforming and impacting the battery cell. A clamp ring is surrounded on the positive electrode shell, and the cover is provided with a support plate for support, and the positive electrode shell is protected by the top cover. The part of the positive electrode shell except the boss is isolated from the outside world to avoid collision and impact, thereby preventing deformation. The top cover and the support plate of the annular structure can protect the positive electrode shell. Even if the boss collides, the top cover and the support plate can prevent it from undergoing a large deformation, and the deformation is limited to the boss part, thereby avoiding the problem of leakage due to structural deformation and protecting the battery cell.

[0017] 2. The utility model seals the gap on the outer side of the boss through the sealing ring of the isolation plate, thereby preventing water vapor and air from entering the accommodating cavity and improving the service life of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0020] Figure 3 It is a schematic diagram of the decomposition of the utility model.

[0021] Description of reference numerals:

[0022] Positive electrode housing 1; negative electrode housing 2; battery cell 3; top cover 4; support plate 5; snap ring 6; bottom gasket 7; isolation plate 8; boss 11; circular groove 21; annular groove 22; recess 41; sealing ring 81. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] It should be noted that in the present invention, the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] Example

[0026] Cooperate Figures 1 to 3 As shown, the utility model discloses a novel button-type lithium battery, comprising a positive electrode shell 1, a negative electrode shell 2, a battery cell 3, a top cover 4, a support plate 5, a snap ring 6 and a bottom pad 7. The battery cell 3 is a prior art and is not limited in this example. The negative electrode shell 2 is provided with a receiving cavity with an opening facing upward. The bottom pad 7, the battery cell 3 and the positive electrode shell 1 are sequentially arranged in the receiving cavity from bottom to top. The diameter of the positive electrode shell 1 is smaller than the diameter of the negative electrode shell 2, and a boss 11 is provided. The snap ring 6 is arranged around the outer periphery of the positive electrode shell 1. The support plate 5 is an annular structure and is covered on the positive electrode shell 1 around the boss 11. A plurality of convex balls for support are arranged in an array on the support plate 5. The top cover 4 is an annular structure and is covered on the support plate 5 and the snap ring 6. The top cover 4, the snap ring 6 and the support plate 5 are respectively made of insulating materials.

[0027] In this embodiment, the battery cell 3 is supported by the bottom pad 7 to prevent the negative electrode shell 2 from deforming and impacting the battery cell 3. A clamp ring 6 is surrounded on the positive electrode shell 1, and a support plate 5 is provided on the cover for support. The positive electrode shell 1 is protected by the top cover 4. The part of the positive electrode shell 1 except the boss 11 is isolated from the outside to prevent collision and impact, thereby preventing deformation. The annular top cover 4 and the support plate 5 can protect the positive electrode shell 1. Even if the boss 11 collides, the top cover 4 and the support plate 5 can prevent it from undergoing a large deformation, and limit the deformation to the boss 11 part, thereby avoiding the problem of leakage due to structural deformation and protecting the battery cell 3.

[0028] The outer side of the clamp ring 6 is provided with a thread structure, and the positive electrode housing 1 and the top cover 4 are provided with a thread structure that is threadably mounted and fixed with the clamp ring 6 .

[0029] The positive electrode housing 1 and the negative electrode housing 2 of the present embodiment may be connected and fixed to the clamping ring 6 by gluing with sealing glue, or the clamping ring 6 may be tightly clamped by packaging equipment to form a tightly fitting sealing structure.

[0030] The top cover 4 is provided with an annular groove matched with the clamping ring 6 at the bottom, and the thread structure is arranged on the inner wall of the annular groove.

[0031] The top cover 4 is provided with a recess 41 surrounding the boss 11 , and an isolation plate 8 is installed in the recess 41 . The isolation plate 8 is an annular structure, and its inner side is tightly fitted with the boss 11 .

[0032] The isolation plate 8 is provided with a sealing ring 81 on its inner side which is in close contact with the boss 11 .

[0033] The isolation plate 8 is glued to the concave portion 41. The sealing ring 81 of the isolation plate 8 seals the gap outside the boss 11 to prevent water vapor and air from entering the accommodating cavity, thereby increasing the service life of the battery cell 3.

[0034] The inner wall of the recess 41 is provided with a thread structure, and the outer side of the isolation plate 8 is provided with a thread structure for threading the recess 41 .

[0035] The isolation plate 8 is made of insulating material.

[0036] A circular groove 21 is formed at the bottom of the negative electrode housing 2 , and an annular groove 22 surrounds the circular groove 21 .

[0037] In this embodiment, a circular groove and an annular groove are provided at the bottom of the negative electrode housing 2 to form a bottom support structure, which can cooperate with the battery holder to prevent it from moving.

[0038] The base pad of this embodiment is preferably made of a conductive material.

[0039] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A new type of button-type lithium battery, characterized by: It includes a positive electrode shell, a negative electrode shell, a battery cell, a top cover, a support plate, a snap ring and a bottom pad. The negative electrode shell is provided with a accommodating cavity with an opening facing upward. The bottom pad, the battery cell and the positive electrode shell are arranged in the accommodating cavity from bottom to top in sequence. The diameter of the positive electrode shell is smaller than the diameter of the negative electrode shell, and a boss is provided. The snap ring is arranged around the outer circumference of the positive electrode shell. The support plate is an annular structure and is arranged on the positive electrode shell around the boss cover. A plurality of convex balls for support are arranged in an array on the support plate. The top cover is an annular structure and is covered on the support plate and the snap ring. The top cover, the snap ring and the support plate are respectively made of insulating materials.

2. A novel button-type lithium battery as claimed in claim 1, characterized in that: The outer side of the clamping ring is provided with a thread structure, and the positive electrode shell and the top cover are provided with a thread structure which is fixedly mounted with the thread of the clamping ring.

3. A novel button-type lithium battery as claimed in claim 2, characterized in that: The top cover is provided with an annular groove matched with the clamping ring at the bottom, and the threaded structure is arranged on the inner wall of the annular groove.

4. A novel button-type lithium battery as claimed in claim 3, characterized in that: The top cover is provided with a recessed portion surrounding the boss, and an isolation plate is installed in the recessed portion. The isolation plate is an annular structure, and the inner side of the isolation plate is tightly fitted with the boss.

5. A novel button-type lithium battery as claimed in claim 4, characterized in that: The isolation plate is provided with a sealing ring on its inner side which is tightly fitted with the boss.

6. A novel button-type lithium battery as claimed in claim 5, characterized in that: The isolation plate is adhered to the concave portion by glue.

7. A novel button-type lithium battery as claimed in claim 5, characterized in that: The inner wall of the recess is provided with a thread structure, and the outer side of the isolation plate is provided with a thread structure for thread installation of the recess.

8. A novel button-type lithium battery as described in any one of claims 6-7, characterized in that: The isolation plate is made of insulating material.

9. A novel button-type lithium battery as claimed in claim 1, characterized in that: A circular groove is provided at the bottom of the negative electrode shell, and an annular groove surrounds the outer side of the circular groove.

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