Carbon battery

Abstract

The utility model provides a carbon battery. The carbon battery comprises a zinc cylinder and a negative plate attached to the outer surface of the bottom wall of the zinc cylinder, a negative electrode external connection part is arranged on the negative electrode plate; a plurality of pits are formed in the edge of the bottom of the zinc cylinder at intervals in the circumferential direction of the zinc cylinder, and bulges which can be correspondingly meshed with the pits one by one are arranged on the edge of the negative plate. According to the carbon battery disclosed by the utility model, the radial displacement of the negative plate caused when the thermal shrinkage film is externally packaged on the battery in the subsequent process can be avoided, and the positions of the negative plate before and after the thermal shrinkage film is packaged and the positions of the negative electrode external connection parts on the negative plate are ensured to be unchanged; and compared with an existing carbon battery which only has a horizontal binding surface between the negative plate and the bottom wall of the zinc cylinder, the contact area between the negative plate and the bottom wall of the zinc cylinder is larger, the contact stability is better, and the reduction of the contact internal resistance is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of battery, especially relates to a carbon battery. BACKGROUND

[0002] The carbon battery is a kind of primary battery, and it is relatively cheap, mainly used for low-power electrical appliances, such as watches, doorbells, remote controllers, calculators, radios, etc.

[0003] The positive active material of the zinc-manganese dry battery is manganese dioxide, which can be electrolytic manganese dioxide, natural manganese dioxide or chemical manganese dioxide, and also contains some carbon materials for conducting electricity, such as a mixture of one or several of acetylene black, graphite, graphene and carbon nanotubes. The positive active material also includes a small amount of zinc oxide material for adjusting the open voltage of the battery, suppressing harmful metal impurities, etc. The positive electrolyte is a mixed aqueous solution of zinc chloride and ammonium chloride. The positive current collector is a carbon rod. The negative active material of the zinc-manganese dry battery is zinc material, and the zinc cylinder made of zinc material is both the negative active material and the container, and also serves as the negative current collector. The positive active material and the electrolyte are contained in the zinc cylinder. A positive end cover and a sealing ring are provided at the opening of the top end of the zinc cylinder, and the positive end cover is separated from the zinc cylinder by the sealing ring; a negative plate is attached to the outer surface of the bottom wall of the zinc cylinder; a heat-shrinkable film and a metal outer skin are wrapped around the circumference of the zinc cylinder, and the end of the heat-shrinkable film is covered on the negative plate by heat-shrinking process, and the end of the metal outer skin is covered on the heat-shrinkable film. However, the existing carbon battery has the following problems during assembly: the diameter of the negative plate is equal to the diameter of the zinc cylinder, and the negative plate is placed on the outer bottom surface of the zinc cylinder with its center axis coinciding with the center axis of the zinc cylinder before the heat-shrinkable film is heat-shrunk and formed, so that the end of the heat-shrinkable film covers the negative plate. During the heat-shrinking process, the negative plate often deviates radially (i.e. "runs off"). Since the center of the negative plate usually has a negative external protruding part, the negative external protruding part passes through the center hole of the insulating compression ring to abut against the negative electrode of the electrical appliance to realize power supply. The deviation of the negative plate will cause the negative external protruding part to deviate from the pre-set position (the center axis of the zinc cylinder), thereby affecting the packaging quality of the battery and the normal docking of the negative electrode of the battery when the battery is installed in the battery compartment of the electrical appliance. SUMMARY

[0004] The utility model aims at providing a carbon battery, which can avoid the radial deviation of the negative plate during battery packaging, thereby affecting the packaging quality of the battery and normal use.

[0005] The technical scheme for realizing the purpose of the utility model is: a carbon battery, comprising a zinc cylinder and a negative plate attached to the outer surface of the bottom wall of the zinc cylinder; a negative external connection part is arranged on the negative plate; a plurality of recesses are arranged at the bottom edge of the zinc cylinder along the circumferential direction thereof at intervals; and a protrusion capable of engaging with the recesses one by one is arranged at the edge of the negative plate.

[0006] The carbon battery of the utility model realizes the purpose of fixing the negative plate through the engagement of the protrusion and the recess, can not only avoid the radial displacement of the negative plate caused by the heat-shrinkable film of the battery in the subsequent process, ensure that the position of the negative plate and the position of the negative external connection part thereon before and after the heat-shrinkable film are unchanged, but also can avoid the rotation of the negative plate, compared with the horizontal fitting surface between the negative plate and the bottom wall of the zinc cylinder of the existing carbon battery, the contact area between the negative plate and the bottom wall of the zinc cylinder is larger and the contact stability is better, which is beneficial to reducing the contact resistance.

[0007] Further, the recesses are uniformly arranged.

[0008] Further, the protrusion is triangular, at this time, the recess is inverted triangular, and the protrusion can be quickly aligned when engaging with the corresponding recess.

[0009] Further, a circular boss is formed at the center position of the negative plate as the negative external connection part, which is used for abutting against the negative electrode of the electric appliance to realize power supply. The diameter of the negative plate is equal to the diameter of the zinc cylinder.

[0010] Further, an insulating compression ring embedding groove is arranged at the edge position of the bottom surface of the negative plate, and an insulating compression ring is embedded and matched in the insulating compression ring embedding groove. When the battery is packaged, the end portion of the heat-shrinkable film covers the insulating compression ring outside the negative plate, the arrangement of the insulating compression ring can improve the insulation effect of the battery, the insulating compression ring embedding groove arranged on the negative plate can realize the radial positioning of the insulating compression ring. The outer diameter of the insulating compression ring is equal to the outer diameter of the zinc cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is an axial sectional structure schematic view of the carbon battery of the utility model;

[0012] Figure 2 It is a side view structure diagram of the zinc cylinder of the utility model;

[0013] Figure 3 It is a side view structure diagram of the assembly structure of the zinc cylinder and the negative plate of the utility model;

[0014] Figure 4 It is a bottom view of the carbon battery of the utility model. DETAILED DESCRIPTION

[0015] The preferable embodiment of the carbon battery of the utility model is described in detail below with reference to the drawings.

[0016] In combination Figures 1-3 , a carbon battery comprises a zinc cylinder 10 and a negative plate 20 attached to the outer surface of the bottom wall of the zinc cylinder 10; the negative plate 20 is provided with a negative external connection part 21; a plurality of recesses 11 are arranged at the bottom edge of the zinc cylinder 10 along the circumference thereof, and a protrusion 22 capable of engaging with the recesses 11 one by one is arranged at the edge of the negative plate 20.

[0017] When the battery is packaged, the circumferential outer side of the zinc cylinder 10 is sequentially covered with a heat-shrinkable film 30 and a metal outer skin 40, the end of the heat-shrinkable film 30 is covered on the lower surface of the negative plate 20 after heat shrinkage, and the end of the metal outer skin 40 is covered on the lower surface of the heat-shrinkable film 30 after heat shrinkage.

[0018] The carbon battery of the utility model can fix the negative plate 20, which not only avoids radial displacement of the negative plate 20 when the heat-shrinkable film 30 is packaged on the battery, ensures that the position of the negative plate 20 and the position of the negative external connection part 21 thereon before and after the heat-shrinkable film is packaged do not change, but also avoids rotation of the negative plate 20, compared with the horizontal fitting surface between the negative plate 20 and the bottom wall of the zinc cylinder of the existing carbon battery, the contact area between the negative plate 20 and the bottom wall of the zinc cylinder is larger and the contact stability is better, which is conducive to reducing the contact resistance.

[0019] Preferably, as shown in Figure 2 , Figure 3 , all the recesses 11 are uniformly arranged.

[0020] Preferably, as shown in Figure 2 , Figure 3 , the protrusion 22 is triangular, at this time, the recess 11 is inverted triangular, and the protrusion 22 can be quickly aligned when engaging with the corresponding recess 11. Of course, the shape of the protrusion 22 can be but is not limited to triangular, and it can also be trapezoidal, square, etc.

[0021] Further, in combination Figure 1 and Figure 4 , a circular boss is formed at the center position of the negative plate 20 as the negative external connection part 21, which is used for abutting against the negative electrode of the electric appliance to realize power supply. In the specific implementation process, the diameter of the negative plate 20 is equal to the diameter of the zinc cylinder 10. Of course, the circular boss can also not be arranged on the negative plate 20.

[0022] Further, as shown in Figure 1 , Figure 3 and Figure 4An insulating press ring 50 is embedded in the insulating press ring embedding groove 23 at the bottom surface edge position of the negative plate 20. When the battery is packaged, the end of the heat shrink film 30 covers the insulating press ring 50 outside the negative plate 20. The insulating press ring 50 can improve the insulation effect of the battery. The insulating press ring embedding groove 23 on the negative plate can realize the radial positioning of the insulating press ring 50. Of course, the insulating press ring embedding groove 23 can not be arranged on the negative plate 20. In the specific implementation process, the outer diameter of the insulating press ring 50 is equal to the outer diameter of the zinc cylinder 10.

[0023] The negative plate 20 is usually made of stainless steel. The circular boss and the insulating press ring embedding groove 23 on the negative plate 20 are formed by stamping.

[0024] The above is only an embodiment of the present application, and does not limit the patent range of the present application. Any equivalent process transformation or direct or indirect application in other related technical fields based on the content of the present application is also included in the patent protection range of the present application.

Claims

1. A carbon battery comprising a zinc cylinder and a negative electrode sheet attached to the outer surface of the bottom wall of the zinc cylinder; a negative electrode external connection portion is provided on the negative electrode sheet; characterized in that: A plurality of recesses are arranged at the bottom edge of the zinc cylinder along the circumference thereof, and a plurality of protrusions are arranged at the edge of the negative plate and capable of engaging with the recesses one by one.

2. The carbon battery of claim 1, wherein: The recesses are uniformly arranged.

3. The carbon battery of claim 1, wherein: The protrusions are triangular, and the recesses are inverted triangular.

4. The carbon battery of claim 1, wherein: A circular boss is formed at the center of the negative plate as the negative external connection part.

5. The carbon battery of claim 4, wherein: The diameter of the negative plate is equal to the diameter of the zinc cylinder.

6. The carbon battery of claim 1, wherein: An insulating press ring embedding groove is arranged at the edge of the bottom surface of the negative plate, and an insulating press ring is embedded and matched in the insulating press ring embedding groove.

7. The carbon battery of claim 6, wherein: The outer diameter of the insulating press ring is equal to the outer diameter of the zinc cylinder.

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