Carbon battery with negative electrode sheet not prone to position deviation

Abstract

The utility model provides a kind of carbon battery with negative plate not easy to run position, including zinc cylinder and the negative plate attached on the outer bottom surface of the zinc cylinder;The upper surface of the negative plate is uneven;The shape of the outer bottom surface of the zinc cylinder and the upper surface of the negative plate is same, and mutually adaptive and adheres to each other.The carbon battery of the utility model can realize the radial limiting of negative plate, thereby avoiding the radial displacement of negative plate caused by subsequent battery outer packaging heat shrink film and heat shrink of the bottom of heat shrink film, ensuring that the central axis of negative plate always coincides with the central axis of battery, improving battery packaging quality while ensuring normal use of battery.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and in particular to a carbon-zinc battery in which the negative electrode sheet is not easily displaced. 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) is attached to the bottom outer surface of the zinc cylinder. A heat-shrinkable film and a metal outer skin are wrapped around the circumference of the zinc cylinder. The end of the heat-shrinkable film covers the edge of the negative electrode sheet through a heat-shrinking process, and the end of the metal outer skin is covered with another heat-shrinkable film. The central area of ​​the negative electrode sheet serves as the external negative terminal of the battery, which is used to contact the negative terminal of the electrical appliance to achieve power conduction. However, existing carbon-zinc batteries have the following problems during assembly: The diameter of the negative electrode sheet is equal to the diameter of the zinc cylinder. After placing the negative electrode sheet on the closed end face of the zinc cylinder with its central axis coinciding with the central axis of the zinc cylinder, the end of the heat-shrinkable film is heat-shrinked. However, during the heat-shrinking process of the end of the heat-shrinkable film, the negative electrode sheet often experiences radial displacement (i.e., "misalignment" or "deviation"), causing the central axis of the negative electrode sheet to deviate from the central axis of the battery. This causes the external negative terminal of the battery to deviate from the center position of the battery end face, which not only affects the battery quality but also affects the normal connection and use of the negative terminal when the battery is installed in the battery compartment of the appliance. Utility Model Content

[0004] The purpose of this invention is to provide a carbon-zinc battery with a negative electrode that is less prone to displacement, which can prevent radial misalignment of the negative electrode during battery packaging, thus avoiding impact on battery packaging quality and normal use.

[0005] The technical solution to achieve the purpose of this utility model is: a carbon-zinc battery with a negative electrode that is not easy to shift, comprising a zinc cylinder and a negative electrode attached to the outer bottom surface of the zinc cylinder; the upper surface of the negative electrode is uneven; the outer bottom surface of the zinc cylinder and the upper surface of the negative electrode have the same shape and are adapted to fit each other.

[0006] The negative electrode sheet of this invention has an uneven upper surface; and the zinc canister of the carbon-zinc battery is designed to have an outer bottom surface with the same shape as the upper surface of the negative electrode sheet. The two are fitted together so that the outer bottom surface of the zinc canister and the upper surface of the negative electrode sheet form a concave-convex contact surface. Compared with the existing carbon-zinc battery zinc canister having a flat outer bottom surface, this design can achieve radial positioning of the negative electrode sheet, thereby preventing radial displacement of the negative electrode sheet during subsequent heat shrinking of the battery outer packaging film and the bottom of the heat shrink film. This ensures that the central axis of the negative electrode sheet always coincides with the central axis of the battery, improving the quality of battery packaging while ensuring the normal use of the battery.

[0007] Furthermore, a circular boss, formed by downward stamping, is provided at the center of the lower surface of the negative electrode sheet for contacting the negative terminal of the electrical appliance to achieve energization. The stamping process of the annular boss creates uneven surfaces on the upper surface of the negative electrode sheet.

[0008] Furthermore, an annular boss, formed by downward stamping, is provided on the lower surface of the negative electrode sheet near its edge. An insulating pressure ring is also provided below the negative electrode sheet, with its upper surface fitting against the lower surface of the negative electrode sheet. The annular boss is inserted into the central hole of the insulating pressure ring. On one hand, the stamping of the annular boss creates uneven surfaces on the upper surface of the negative electrode sheet, providing a suitable contact surface for the zinc cylinder's bottom wall. On the other hand, the annular boss also radially limits the insulating pressure ring, preventing radial displacement during heat shrinking of the battery packaging film and the bottom of the heat shrink film. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the axial cross-sectional structure of the carbon-zinc battery with a negative electrode that is not easily displaced according to this utility model.

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

[0011] Figure 3 This is a bottom view of the carbon-zinc battery with a negative electrode that is not easily displaced according to this invention. Detailed Implementation

[0012] The preferred embodiment of the carbon-zinc battery of the present invention, which has a negative electrode that is not easily displaced, is described in detail below with reference to the accompanying drawings.

[0013] Combination Figure 1 and Figure 2 A carbon-zinc battery with a negative electrode that is not easily displaced includes a zinc cylinder 10 and a negative electrode 20 attached to the outer bottom surface of the zinc cylinder 10; the upper surface of the negative electrode 20 is uneven; the outer bottom surface of the zinc cylinder 10 and the upper surface of the negative electrode 20 have the same shape and are adapted to fit each other.

[0014] The carbon-zinc battery of this invention can achieve radial positioning of the negative electrode 20, thereby preventing the negative electrode 20 from radially shifting during subsequent heat shrinking of the battery outer packaging heat shrink film 30 and the bottom of the heat shrink film 30. This ensures that the central axis of the negative electrode 20 always coincides with the central axis of the battery, improving the quality of battery packaging while ensuring the normal use of the battery.

[0015] The negative electrode 20 is typically made of stainless steel.

[0016] Furthermore, in combination Figure 1 and Figure 3 A circular lower boss 21, formed by downward stamping, is provided at the center of the lower surface of the negative electrode 20. This boss is used to contact the negative terminal of the electrical appliance to achieve energization. The stamping process of the annular boss 21 creates uneven surfaces on the upper surface of the negative electrode 20.

[0017] Furthermore, in combination Figure 1 and Figure 3 An annular protrusion 22, formed by downward stamping, is provided on the lower surface of the negative electrode 20 near its edge. An insulating pressure ring 50 is also provided below the negative electrode 20. The upper surface of the insulating pressure ring 50 is in contact with the lower surface of the negative electrode 20, and the annular protrusion 22 is inserted into the central hole 51 of the insulating pressure ring 50. On the one hand, the stamping of the annular protrusion 22 makes the upper surface of the negative electrode 20 uneven, providing conditions for forming a contact surface with the bottom wall of the zinc cylinder 10. On the other hand, the annular protrusion 22 can also achieve radial positioning of the insulating pressure ring 50, preventing radial displacement of the insulating pressure ring 50 when the heat-shrink film 30 of the battery outer packaging is heat-shrinked or when the bottom of the heat-shrink film 30 is heat-shrinked.

[0018] In practice, the insulating pressure ring 50 can be made of plastic.

[0019] The bottom wall 11 of the zinc cylinder 10 is stamped to form an outer surface shape that is the same as the shape of the upper surface of the negative electrode 20.

[0020] 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-zinc battery with a negative electrode that is not easily displaced, characterized in that... It includes a zinc cylinder and a negative electrode sheet attached to the outer bottom surface of the zinc cylinder; the upper surface of the negative electrode sheet is uneven; the outer bottom surface of the zinc cylinder and the upper surface of the negative electrode sheet have the same shape and are adapted to fit each other.

2. The carbon-zinc battery with a negative electrode that is not easily displaced according to claim 1, characterized in that: A circular lower boss, formed by downward stamping, is provided at the center of the lower surface of the negative electrode sheet.

3. The carbon-zinc battery with a negative electrode that is not easily displaced according to claim 1, characterized in that: An annular boss, formed by downward stamping, is provided on the lower surface of the negative electrode sheet near the edge; an insulating pressure ring is also provided below the negative electrode sheet, the upper surface of the insulating pressure ring is in contact with the lower surface of the negative electrode sheet, and the annular boss is inserted into the central hole of the insulating pressure ring.

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