Carbon battery with negative electrode sheet positioning function

Abstract

This invention provides a carbon-zinc battery with a negative electrode positioning function, comprising a zinc cylinder, a negative electrode, and an insulating ring stacked sequentially along the axial direction of the battery; the upper surface of the negative electrode is in contact with the outer bottom surface of the zinc cylinder; at least two recesses are spaced apart circumferentially on the outer bottom surface of the zinc cylinder; the upper surface of the insulating ring is in contact with the lower surface of the negative electrode; positioning protrusions corresponding to the recesses are provided on the upper surface of the insulating ring; through holes corresponding to the positioning protrusions are provided on the negative electrode; each positioning protrusion passes through the corresponding through hole and engages with the corresponding recess; the diameter of the positioning protrusion is slightly smaller than the diameter of the corresponding through hole. This carbon-zinc battery can achieve radial positioning of the insulating ring and the negative electrode, preventing radial movement of the negative electrode and the insulating ring during packaging after battery assembly, thus ensuring that the negative electrode and its external negative electrode portion remain in unchanged position before and after heat-shrink film packaging.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and in particular to a carbon battery with a negative electrode positioning function. Background Technology

[0002] Carbon-zinc batteries, also known as zinc-manganese dry batteries, are primary cells in chemical power sources and are disposable. They are relatively inexpensive and mainly used in low-power electrical appliances such as clocks, doorbells, remote controls, calculators, and radios.

[0003] The positive electrode active material of a zinc-manganese dioxide dry cell battery is manganese dioxide, which can be electrolytic manganese dioxide, natural manganese dioxide, or chemically produced manganese dioxide. It also contains carbon materials for conductivity, such as acetylene black, graphite, graphene, and carbon nanotubes, or a mixture of several of these. The positive electrode active material also includes a small amount of zinc oxide, used to regulate the battery's opening voltage and suppress harmful metal impurities. The positive electrode electrolyte is a mixed aqueous solution of zinc chloride and ammonium chloride. The positive electrode current collector is a carbon rod. The negative electrode active material of a zinc-manganese dioxide dry cell battery is zinc, housed in a zinc cylinder. This zinc cylinder serves as the negative electrode active material, the container, and the negative electrode current collector. Both the positive electrode active material and the electrolyte are contained within the zinc cylinder. A positive terminal cap and a sealing ring are provided at the top opening of the zinc cylinder, and the sealing ring separates the positive terminal cap from the zinc cylinder. A negative electrode sheet (in the shape of a disc) and an insulating pressure ring are attached to the outer surface of the bottom end of the zinc cylinder. A heat-shrinkable film and a metal outer skin are wrapped around the circumferential outer side of the zinc cylinder. The end of the heat-shrinkable film is covered on the insulating pressure ring by a heat-shrinking process, and the end of the metal outer skin is then covered on the heat-shrinkable film. The negative electrode sheet area corresponding to the central cavity of the insulating pressure ring serves as the negative electrode external part of the battery, which is used to contact the negative electrode of the electrical appliance to achieve power conduction. However, existing carbon-zinc batteries have the following problems during assembly: the diameter of the assembly consisting of the negative electrode sheet and the insulating ring is equal to the diameter of the zinc cylinder. After placing the assembly on the closed end face of the zinc cylinder with its central axis aligned with the central axis of the zinc cylinder, the end of the heat-shrinkable film is heat-shrinked. However, during the heat-shrinking process, the assembly often experiences radial displacement (i.e., "deviation"), causing the central axis of the assembly and the negative electrode sheet to deviate from the central axis of the battery. This results in the negative electrode external part of the battery being off-center from the battery end face, affecting not only the battery quality but also the normal connection and use of the negative electrode when the battery is installed in the battery compartment of an appliance. Utility Model Content

[0004] The purpose of this invention is to provide a carbon battery with a negative electrode positioning function, which can prevent the negative electrode from radially shifting during battery packaging.

[0005] The technical solution to achieve the purpose of this utility model is: a carbon-zinc battery with a negative electrode positioning function, comprising a zinc cylinder, a negative electrode, and an insulating ring stacked sequentially along the axial direction of the battery; the upper surface of the negative electrode is in contact with the outer bottom surface of the zinc cylinder; at least two recesses are spaced apart circumferentially on the outer bottom surface of the zinc cylinder; the upper surface of the insulating ring is in contact with the lower surface of the negative electrode; positioning protrusions corresponding to the recesses are provided on the upper surface of the insulating ring; through holes corresponding to the positioning protrusions are provided on the negative electrode; each positioning protrusion passes through the corresponding through hole and engages with the corresponding recess; the diameter of the positioning protrusion is slightly smaller than the diameter of the corresponding through hole.

[0006] The carbon-zinc battery of this invention uses a positioning protrusion that engages with a recess. The diameter of the positioning protrusion is slightly smaller than the diameter of the corresponding through-hole, allowing the protrusion to be inserted into and confined within the through-hole. This radially limits the insulating ring and the negative electrode sheet, preventing radial movement of the negative electrode sheet and insulating ring during packaging after battery assembly. This ensures that the negative electrode sheet and its external negative electrode portion remain unchanged before and after heat-shrink film packaging. For example, the central axes of the zinc cylinder, negative electrode sheet, and insulating ring are pre-aligned, and the central axis of the negative electrode sheet still coincides with the central axis of the zinc cylinder after heat-shrink film is applied, thus not affecting the battery packaging quality or normal use.

[0007] Furthermore, the aforementioned pits are evenly distributed.

[0008] The diameter of the negative electrode sheet is greater than the inner diameter of the insulating pressure ring, and the area of ​​the negative electrode sheet corresponding to the central hole of the insulating pressure ring is the negative electrode external connection area. Furthermore, the negative electrode external connection area is provided with an outwardly protruding negative electrode sheet external connection boss. In this case, the negative electrode sheet external connection boss serves as the negative electrode external connection part, used to contact the negative electrode of the electrical appliance to achieve energization. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the axial cross-sectional structure of the carbon-zinc battery with negative electrode positioning function according to this utility model.

[0010] Figure 2 This is a bottom view of the zinc cylinder of this utility model;

[0011] Figure 3 This is a top or bottom view of the negative electrode sheet of this utility model;

[0012] Figure 4 This is a top or bottom view of the insulating pressure ring of this utility model. Detailed Implementation

[0013] The preferred embodiment of the carbon-zinc battery with negative electrode positioning function of this utility model is described in detail below with reference to the accompanying drawings.

[0014] Combination Figures 1-4 A carbon-zinc battery with a negative electrode positioning function includes a zinc cylinder 10, a negative electrode 20, and an insulating pressure ring 30 stacked sequentially along the axial direction of the battery. The upper surface of the negative electrode 20 is in contact with the outer bottom surface of the zinc cylinder 10. At least two recesses 11 are provided circumferentially on the outer bottom surface of the zinc cylinder 10. The upper surface of the insulating pressure ring 30 is in contact with the lower surface of the negative electrode 20. Positioning protrusions 31 corresponding to the recesses 11 are provided on the upper surface of the insulating pressure ring 30. Through holes 21 corresponding to the positioning protrusions 31 are provided on the negative electrode 20. Each positioning protrusion 31 passes through the corresponding through hole 21 and engages with the corresponding recess 11. The diameter of the positioning protrusion 31 is slightly smaller than the diameter of the corresponding through hole 21.

[0015] Before packaging, the zinc cylinder 10, the negative electrode sheet 20, and the insulating pressure ring 30 are assembled by the positioning protrusion 31 passing through the corresponding through hole 21 and engaging with the corresponding recess 11. Then, the heat shrink film 40 and the metal outer skin 50 are packaged.

[0016] The carbon-zinc battery of this invention can prevent the negative electrode sheet 20 and the insulating pressure ring 30 from radially moving during the packaging heat shrink film process, and keep the negative electrode sheet 20 and its negative electrode external part in the same position before and after the packaging heat shrink film 40, so as not to affect the battery packaging quality and normal use.

[0017] Furthermore, such as Figure 2 As shown, the pits 11 are evenly distributed.

[0018] like Figure 1 As shown, the diameter of the negative electrode 20 is greater than the inner diameter of the insulating ring 30, and the area of ​​the negative electrode corresponding to the central hole 32 of the insulating ring 30 is the negative electrode outer contact area. Furthermore, in conjunction with... Figure 1 and Figure 3 The negative electrode outer contact area is provided with an outwardly protruding negative electrode outer contact boss 22. In this case, the negative electrode outer contact boss 22 serves as the negative electrode outer contact part, used to abut against the negative electrode of the electrical appliance to achieve power transmission. Of course, the negative electrode 20 of this utility model may not have the negative electrode outer contact boss 22.

[0019] The negative electrode 20 is typically made of stainless steel.

[0020] The insulating pressure ring 30 is typically made of plastic.

[0021] like Figure 1As shown, the negative electrode plate external boss 22 on the negative electrode plate 20 is formed by stamping.

[0022] like Figure 1 As shown, the recesses 11 on the zinc cylinder 10 are also formed by stamping.

[0023] like Figure 1 As shown, the positioning protrusion 31 and the insulating pressure ring 30 are integrally formed.

[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent process transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A carbon battery with negative plate positioning function, comprising a zinc cylinder, a negative plate and an insulating press ring which are stacked in sequence along the axial direction of the battery; the upper surface of the negative plate is in contact with the outer bottom surface of the zinc cylinder; characterized in that: At least two recesses are spaced circumferentially on the outer bottom surface of the zinc cylinder; the upper surface of the insulating pressure ring is in contact with the lower surface of the negative electrode sheet; a positioning protrusion corresponding to each of the recesses is provided on the upper surface of the insulating pressure ring; a through hole corresponding to each of the positioning protrusions is opened on the negative electrode sheet; each positioning protrusion passes through the corresponding through hole and engages with the corresponding recess; the diameter of the positioning protrusion is slightly smaller than the diameter of the corresponding through hole.

2. The carbon battery having a negative electrode tab positioning function according to claim 1, characterized by: The pits are evenly distributed.

3. The carbon battery having a negative electrode tab positioning function according to claim 1, characterized by: The diameter of the negative electrode sheet is greater than the inner diameter of the insulating ring, and the area of ​​the negative electrode sheet corresponding to the central hole of the insulating ring is the negative electrode external contact area.

4. The carbon battery having a negative electrode tab positioning function according to claim 3, characterized by: The negative electrode external connection area is provided with an outwardly protruding negative electrode plate external protrusion.

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