Alkaline battery current collector

Abstract

The utility model discloses an alkaline battery current collector which comprises a current collecting nail, the current collecting nail is provided with a head part and a needle body which are connected, the diameter of the needle body is smaller than the aperture of a central hole of an alkaline battery sealing ring so as to realize interference fit, and a groove is arranged on the peripheral surface of a section of the needle body corresponding to the sealing ring. And the proportion of the notch area of the groove to the total contact area of the needle body and the sealing ring is controlled to be 0.2-0.6. According to the utility model, the groove is formed in the peripheral surface of the section of the needle body corresponding to the sealing ring, so that the overall stress of the sealing ring in the process of inserting a current collector into the central hole of the sealing ring is reduced, and the risk of cracking of the sealing ring can be reduced. In addition, the groove can be formed in the outer peripheral surface of the needle body in a stamping mode, and the groove is easy to machine.

Description

Technical Field

[0001] The utility model relates to the field of alkaline battery structures, in particular to an alkaline battery current collector. Background Art

[0002] In the field of alkaline battery manufacturing, the collector is an important accessory of alkaline batteries. The diameter of the collector pin of the collector is usually larger than the diameter of the center hole of the sealing ring. During the assembly process of the battery collector, due to the interference fit between the sealing ring (plastic part) and the collector pin, the collector pin and the sealing ring fit tightly and have large friction. A larger axial external force needs to be applied to smoothly insert the collector pin into the center hole of the sealing ring. The sealing ring sometimes cracks, causing quality accidents and battery leakage. Utility Model Content

[0003] The utility model aims to provide an alkaline battery collector, which can reduce the risk of cracking of a sealing ring when the collector is inserted into a current collecting pin.

[0004] The technical solution for achieving the purpose of the utility model is: an alkaline battery collector, including a current collecting nail, the current collecting nail has a connected head and a needle body, the diameter of the needle body is greater than the central hole diameter of the sealing ring of the alkaline battery to achieve interference fit, and a groove is provided on the outer circumferential surface of a section of the needle body corresponding to the sealing ring, and the ratio of the notch area of ​​the groove to the total contact area of ​​the needle body and the sealing ring is controlled to be 0.2 to 0.6.

[0005] The utility model reduces the overall force of the sealing ring during the process of inserting the current collector into the center hole of the sealing ring by arranging a groove on the outer peripheral surface of a section of the needle body corresponding to the sealing ring, and can reduce the risk of cracking of the sealing ring. In addition, the groove can be formed on the outer peripheral surface of the needle body by stamping, and the groove is easy to process. In addition, by controlling the ratio of the notch area of ​​the groove to the total contact area of ​​the needle body and the sealing ring, the purpose of simultaneously taking into account the sealing between the current collector and the sealing ring and preventing the cracking of the sealing ring can be achieved.

[0006] Furthermore, the depth of the groove is 0.03-0.1 mm.

[0007] Furthermore, the diameter of the needle body is 0.07 to 0.12 mm larger than the diameter of the central hole.

[0008] Furthermore, there are a plurality of grooves, and each of the grooves is in a dot shape. Each of the grooves can also be in a ring shape.

[0009] In a specific implementation process, the grooves are evenly spaced and distributed.

[0010] Furthermore, a sealant is applied to the inner surface of the groove to further enhance the sealing effect between the sealing ring and the current collecting pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a front view of the alkaline battery collector of Example 1, wherein the negative electrode shell is an axial cross-sectional view;

[0012] Figure 2 This is an assembly structure diagram between the alkaline battery collector and the sealing ring of Example 1, wherein the negative electrode shell and the sealing ring are both axial cross-sectional structure diagrams;

[0013] Figure 3 It is a front structural diagram of the alkaline battery collector of Example 2, wherein the negative electrode shell is an axial cross-sectional structural diagram. DETAILED DESCRIPTION

[0014] The preferred embodiments of the alkaline battery collector of the present invention are described in detail below in conjunction with the accompanying drawings. Example 1

[0015] Combination Figure 1 and Figure 2 , an alkaline battery collector, comprising a current collecting nail, the current collecting nail having a head 10 and a needle body 20 connected to each other, the diameter r of the needle body 20> the central hole diameter R of the sealing ring 30 of the alkaline battery to achieve interference fit, and a groove 21 is provided on the outer circumference of a section of the needle body 20 corresponding to the sealing ring 30;

[0016] There are three grooves 21, and each groove 21 is annular;

[0017] The ratio of the sum of the notch areas of the grooves 21 to the total contact area between the needle body 20 and the sealing ring 30 is controlled to be 0.2-0.6;

[0018] The depth h of the groove 21 is 0.03-0.1 mm. Example 2

[0019] The alkaline battery collector of Example 2 is different from that of Example 1 in that: Figure 3 As shown, there are a plurality of grooves 21, and each of the grooves 21 is in a dot shape.

[0020] The alkaline battery collectors of Examples 1 and 2 both provide a groove 21 on the outer circumference of a section of the needle body 20 corresponding to the sealing ring 30, thereby reducing the overall force on the sealing ring 30 during the insertion of the collector into the central hole 31 of the sealing ring 30, and reducing the risk of cracking of the sealing ring 30. Moreover, the groove 21 can be formed on the outer circumference of the needle body 20 by stamping, and the groove 21 is easy to process. In addition, by controlling the ratio of the notch area of ​​the groove 21 to the total contact area of ​​the needle body 20 and the sealing ring 30, the purpose of simultaneously taking into account the sealing between the collector and the sealing ring 30 and preventing the cracking of the sealing ring 30 can be achieved.

[0021] Of course, the number, shape, and distribution structure of the grooves 21 of the present invention can be, but are not limited to, the specific number, shape, and distribution structure in the accompanying drawings. The depth h of the grooves 21 can also be shallower, and the grooves 21 can have an interference fit with the needle body 20. When the interference fit is smaller than that at the non-groove 21 position of the sealing ring 10, a certain degree of anti-cracking effect can be achieved.

[0022] The groove 21 is preferably, but not limited to, an arc shape as shown in the drawings, and may also be a common shape such as a trapezoid or a square.

[0023] Further, such as Figure 1 As shown, the diameter r of the needle body 20 is 0.07 to 0.12 mm larger than the diameter R of the central hole 31 .

[0024] Further, such as Figure 1 , Figure 3 As shown, the grooves 21 are evenly spaced.

[0025] Furthermore, a sealant is applied to the inner surface of the groove 21 to further enhance the sealing effect between the sealing ring 30 and the needle body 20. Of course, the inner surface of the groove 21 may not be coated with a sealant.

[0026] In the specific implementation process, Figure 1 to Figure 3 As shown, the alkaline battery current collector further includes a negative electrode shell 40 .

[0027] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. An alkaline battery collector, comprising a current collecting nail, wherein the current collecting nail has a head and a needle body connected to each other, the diameter of the needle body is greater than the diameter of the central hole of the sealing ring of the alkaline battery to achieve interference fit, characterized in that: A groove is arranged on the outer peripheral surface of a section of the needle body corresponding to the sealing ring, and the ratio of the notch area of ​​the groove to the total contact area of ​​the needle body and the sealing ring is controlled to be 0.2-0.

6.

2. The alkaline battery current collector according to claim 1, characterized in that: The depth of the groove is 0.03-0.1 mm.

3. The alkaline battery current collector according to claim 1, characterized in that: The diameter of the needle body is 0.07 to 0.12 mm larger than the diameter of the central hole.

4. The alkaline battery current collector according to claim 1, characterized in that: The grooves are in a dot shape.

5. The alkaline battery current collector according to claim 1, characterized in that: The groove is annular.

6. The alkaline battery current collector according to claim 1, characterized in that: There are a plurality of grooves which are evenly distributed.

7. The alkaline battery current collector according to claim 1, characterized in that: Apply sealant to the inner surface of the groove.

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