Connecting structure of current collecting nail and sealing ring of alkaline battery

Abstract

The utility model discloses a connecting structure of a current collecting nail and a sealing ring of an alkaline battery. A center hole is formed in the sealing ring; the flow collecting nail is provided with a head part and a needle body which are connected; the needle body of the current collecting nail is coaxially inserted into the center hole of the sealing ring; the inner side surface of the center hole of the sealing ring is provided with a needle body contact part which can be in contact fit with the peripheral surface of the needle body, and the aperture of the center hole at the needle body contact part is smaller than the diameter of the needle body to form interference fit, so that sealing between the sealing ring and the current collecting nail is realized; a groove is further formed in the needle body contact portion of the sealing ring, and the surface area, occupied by the groove, of the needle body contact portion is 1 / 10-1 / 2 of the total surface area of the needle body contact portion of the sealing ring. According to the connecting structure, the risk that the sealing ring cracks when the flow collecting nail is inserted can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of alkaline battery structures, in particular to a connection structure between a current collecting nail and a sealing ring of an alkaline battery. 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 a connection structure between a current collecting pin and a sealing ring of an alkaline battery, which can reduce the risk of the sealing ring cracking when the current collecting pin is inserted.

[0004] The technical solution for achieving the purpose of the utility model is: a connection structure between an alkaline battery current collecting pin and a sealing ring, wherein a center hole is provided on the sealing ring; the current collecting pin has a connected head and a needle body; the needle body of the current collecting pin is coaxially inserted into the center hole of the sealing ring; a needle body contact portion is provided on the inner surface of the center hole of the sealing ring, which contacts and fits with the outer peripheral surface of the needle body, and the diameter of the center hole at the needle body contact portion is smaller than the diameter of the needle body to form an interference fit; a groove is also provided on the needle body contact portion of the sealing ring, and the surface area of ​​the needle body contact portion occupied by the groove is 1 / 10 to 1 / 2 of the total surface area of ​​the needle body contact portion of the sealing ring.

[0005] In the connection structure of the alkaline battery current collecting pin and the sealing ring of the utility model, when drilling a hole in the sealing ring, the aperture of the central hole is controlled to be smaller than the diameter of the needle body so that an interference fit is formed between the sealing ring and the needle body, and then a groove is opened on the needle body contact portion of the sealing ring, and it is controlled that "the surface area of ​​the needle body contact portion occupied by the groove is 1 / 10 to 1 / 2 of the total surface area of ​​the needle body contact portion of the sealing ring". While ensuring a good sealing effect, the setting of the groove can reduce the extrusion pressure at the groove of the sealing ring, thereby reducing the overall stress of the sealing ring and reducing the risk of the sealing ring cracking when the current collecting pin is inserted.

[0006] Furthermore, the depth h of the groove is usually controlled to be 0.05-0.25 mm.

[0007] Furthermore, the depth h of the groove is preferably such that a cavity can be enclosed between the surface of the groove and the outer peripheral surface of the needle body. In this case, the groove depth h is deeper, which not only reduces the contact surface between the sealing ring and the needle body and reduces the friction, but also provides a certain extrusion deformation space for the sealing ring, which has a better effect of reducing the cracking of the sealing ring when the current collecting pin is inserted; and when the alkaline battery is stored for a long time, when the electrolyte diffuses outward along the fitting seam between the sealing ring and the current collecting pin to the position of the groove, it will be stored in the groove and will not continue to diffuse outward, which has a certain effect of preventing "alkali climbing".

[0008] Furthermore, the groove is located in the axial middle portion of the sealing ring.

[0009] Furthermore, the grooves are arranged in a dot shape, a strip shape, or a ring shape.

[0010] Furthermore, the grooves are preferably multiple.

[0011] Furthermore, the diameter of the central hole at the contact portion of the needle body is 0.07 to 0.12 mm smaller than the diameter of the needle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the axial cross-sectional structure of the sealing ring of Example 1;

[0013] Figure 2 is a developed structural diagram of the inner surface of the center hole of the sealing ring of Example 1;

[0014] Figure 3 Schematic diagram of the axial cross-sectional structure of the connection structure between the current collecting pin and the sealing ring of the alkaline battery in Example 1 or 2;

[0015] Figure 4 Schematic diagram of the axial cross-sectional structure of the sealing ring of Example 2. DETAILED DESCRIPTION

[0016] The preferred embodiment of the connection structure between the alkaline battery current collecting nail and the sealing ring of the utility model is described in detail below with reference to the accompanying drawings. Example 1

[0017] Combination Figure 1 to Figure 3, the connection structure of the alkaline battery current collecting nail and the sealing ring of Example 1, the sealing ring 10 is provided with a center hole; the current collecting nail 20 has a connected head 21 and a needle body 22; the needle body 22 of the current collecting nail 20 is coaxially inserted into the center hole of the sealing ring 10; the center hole of the sealing ring 10 has a needle body contact part 11 that contacts and fits with the outer peripheral surface of the needle body 22, and the center hole diameter R at the needle body contact part 11 is smaller than the diameter r of the needle body 22 to form an interference fit, so as to achieve the sealing between the sealing ring 10 and the current collecting nail 20; a groove 12 is also provided on the needle body contact part 11 of the sealing ring 10, and the surface area of ​​the needle body contact part 11 occupied by the groove 12 is 1 / 10 to 1 / 2 of the total surface area of ​​the needle body contact part 11 of the sealing ring 10; there are several grooves 12, each of which is in the shape of a point and is distributed at intervals on the sealing ring 10 On the needle body contact portion 11. Example 2

[0018] Combination Figure 3 and Figure 4 The connection structure between the alkaline battery current collecting nail and the sealing ring of Example 2 is different from that of Example 1 in that: there are three grooves 12, and each groove 12 is annular.

[0019] The connection structure between the alkaline battery current collecting pin and the sealing ring of Example 1 and Example 2 reduces the extrusion pressure of the sealing ring 10 at the groove by providing the groove 12, thereby reducing the overall stress of the sealing ring 10 and reducing the risk of the sealing ring 10 cracking when the current collecting pin 20 is inserted.

[0020] Of course, the number, shape, and distribution structure of the grooves 12 of the present invention may be, but are not limited to, the specific number, shape, and distribution structure shown in the drawings.

[0021] Furthermore, the depth h of the groove 12 is usually controlled to be 0.05-0.25 mm.

[0022] like Figure 1 , Figure 4As shown, the depth h of the groove 12 is preferably such that a cavity can be enclosed between the surface of the groove 12 and the outer peripheral surface of the needle body 22. At this time, the deeper the depth h of the groove 12 is, the smaller the contact surface between the sealing ring 10 and the needle body 22 is, the weaker the friction force is, and the cavity also provides a certain extrusion deformation space for the sealing ring 10, which can better reduce the cracking effect of the sealing ring 10 when the current collecting pin 20 is inserted; at the same time, during the long-term storage of alkaline batteries, when the electrolyte diffuses to the position of the groove 12, it will be stored in the groove 12, which has a certain anti-"alkali climbing" effect. Of course, the depth h of the groove 12 can also be shallower, and at this time the inner surface of the groove 12 will be interference fit with the needle body 22, but the interference will be smaller than the non-groove 12 position of the sealing ring 10, which can still play a certain degree of anti-cracking effect.

[0023] Further, such as Figure 1 to Figure 4 As shown, the groove 12 is located in the axial middle of the sealing ring 10. Of course, the groove 12 can also be provided at the position of the needle body contact portion 12 of the sealing ring 10 close to the two axial ends.

[0024] Typically, the diameter R of the central hole at the needle body contact portion 11 is 0.07-0.12 mm smaller than the diameter r of the needle body 22 .

[0025] 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. A connection structure between an alkaline battery current collecting pin and a sealing ring, wherein the sealing ring is provided with a center hole; the current collecting pin has a head and a needle body connected to each other; the needle body of the current collecting pin is coaxially inserted into the center hole of the sealing ring; the inner surface of the center hole of the sealing ring has a needle body contact portion that contacts and fits with the outer peripheral surface of the needle body, and the center hole diameter at the needle body contact portion is smaller than the needle body diameter to form an interference fit; the characteristics are: A groove is also provided on the needle body contact portion of the sealing ring, and the surface area of ​​the needle body contact portion occupied by the groove is 1 / 10 to 1 / 2 of the total surface area of ​​the needle body contact portion of the sealing ring.

2. The connection structure of the alkaline battery current collecting nail and the sealing ring according to claim 1, characterized in that: The groove is located in the axial middle of the sealing ring.

3. The connection structure of the alkaline battery current collecting nail and the sealing ring according to claim 1, characterized in that: The grooves are arranged in a dot shape, a strip shape, or a ring shape.

4. The connection structure of the alkaline battery current collecting nail and the sealing ring according to claim 1, characterized in that: The number of the grooves is multiple.

5. The connection structure of the alkaline battery current collecting nail and the sealing ring according to claim 1, characterized in that: The depth of the groove is controlled to be 0.05-0.25 mm.

6. The connection structure of the alkaline battery current collecting nail and the sealing ring according to claim 1, characterized in that: The depth of the groove is set so that a cavity can be enclosed between the surface of the groove and the outer peripheral surface of the needle body.

7. The connection structure of the alkaline battery current collecting nail and the sealing ring according to claim 1, characterized in that: The diameter of the central hole at the needle body contact portion is 0.07 to 0.12 mm smaller than the diameter of the needle body.

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