CN212810349U

CN212810349U - High-rate columnar zinc-manganese battery

Info

Publication number: CN212810349U
Application number: CN202020612628.8U
Authority: CN
Inventors: 郑惠民; 李卓异; 吴文恒; 黄钊华; 崔一凡
Original assignee: Zhongshan Huashun Technology Co ltd
Current assignee: Zhongshan Huashun Technology Co ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2021-03-26
Anticipated expiration: 2030-04-22

Abstract

The utility model provides a high-multiplying-power columnar zinc-manganese battery, which comprises a zinc shell, a carbon rod, a diaphragm, a negative electrode bottom, a positive electrode cap and a positive electrode post, wherein the positive electrode post is arranged in the zinc shell; a carbon rod is inserted into the positive pole, a necking is formed in the opening end of the zinc shell, the outer side of the rubber plug is sleeved on the outer side end of the necking of the zinc shell, the upper end of the carbon rod is connected with the rubber plug, and the lower end of the carbon rod is downwards inserted into the positive pole and extends to the bottom end of the zinc shell; the upper end of the carbon rod is connected with the positive electrode cap, and the negative electrode bottom is arranged on the outer side of the bottom surface of the zinc shell; the anode column is formed by compounding a three-dimensional carbon nanotube frame, a manganese dioxide material, an acetylene black material, a binder material and an electrolyte material. The utility model discloses a three-dimensional carbon nanotube frame is as zinc deposit/dissolve the support, and carbon nanotube's weight electrolyte material's concentration makes the electric field distribution on electrode surface more even simultaneously, and zinc nucleation overpotential is showing and is reducing, has inhibited the production of zinc dendrite and other accessory substances effectively, has obviously improved the multiplying power performance of battery.

Description

High-rate columnar zinc-manganese battery

Technical Field

The utility model belongs to the technical field of the battery technique and specifically relates to a high magnification column zinc-manganese dioxide battery.

Background

With the advent of the electronic age, more and more electronic products, such as cameras, flashlights, calculators, electric toys, and the like, are required to continuously discharge large current and have high energy. Common carbon batteries and difficulty in meeting capacity requirements; the lithium ion battery has flammable and explosive accidents due to the use of organic electrolyte, and is expensive; the zinc-nickel battery is also very expensive due to the lack of nickel resources.

The zinc-manganese battery has reasonable structural design, can be produced in large scale, has excellent electrochemical performance and higher cost performance, has the capacitance 4-5 times that of the common carbon battery, and is low in price and applied in large scale. The zinc-manganese battery has a huge share in the battery market and is inseparable from the wide application, and is the leading product of a civil primary battery, and almost all low-voltage direct-current appliances can use the zinc-manganese battery as a power supply.

The carbon zinc-manganese battery has excellent electrochemical performance and higher cost performance, is always popular with wide consumers, and has low cost and environmental protection, and the carbon zinc-manganese battery has small electric capacity, poor conductivity and poor cycle stability during charging and discharging tests and use since the mercury-free carbon zinc-manganese battery is put into the market. Therefore, the development of a high-rate and high-capacity zinc-manganese battery is the key to improve the performance of the battery.

Disclosure of Invention

The utility model provides a high magnification column zinc-manganese dioxide cell which is not enough for the prior art.

The technical scheme of the utility model is that: a high-rate columnar zinc-manganese battery comprises a zinc shell, a carbon rod, a diaphragm, a negative electrode bottom, a positive electrode cap and a positive electrode column, wherein the positive electrode column is arranged in the zinc shell; a carbon rod is inserted into the positive pole, a necking is formed in the opening end of the zinc shell, the outer side of the rubber plug is sleeved on the outer side end of the necking of the zinc shell, the upper end of the carbon rod is connected with the rubber plug, and the lower end of the carbon rod is downwards inserted into the positive pole and extends to the bottom end of the zinc shell;

the upper end of the carbon rod is connected with the positive electrode cap, and the lower end face of the positive electrode cap is in contact connection with the upper end face of the rubber plug;

the negative electrode bottom is arranged on the outer side of the bottom surface of the zinc shell and is in contact connection with the outer side surface of the bottom surface of the zinc shell;

the anode column consists of a three-dimensional carbon nano tube frame and an anode material mixing layer filled in the three-dimensional carbon nano tube frame.

Preferably, the cathode material mixed layer is a columnar structure formed by extruding and compounding a manganese dioxide material, an acetylene black material, a binder material and an electrolyte, and the three-dimensional carbon nanotube frame is connected to the surface of the manganese dioxide material to serve as a zinc deposition/dissolution support.

Preferably, the weight of the three-dimensional carbon nanotube frame is 1-10% of that of the positive pole. The concentration of the electrolyte material is 10% -60%.

Preferably, the zinc shell is of a cylindrical structure with one closed end.

Preferably, a diaphragm is arranged between the positive pole and the inner side wall of the zinc shell.

Preferably, the electrolyte material is an aqueous solution of a weak acid and a weak base salt.

Preferably, the electrolyte material is any one of an aqueous solution of zinc chloride and ammonium chloride, an aqueous solution of zinc sulfate and ammonium chloride, and an aqueous solution of zinc acetate and ammonium chloride.

Preferably, the binder material is one or a mixture of several of polyacrylic acids, polyacrylic alcohols, polyacrylamide and carboxymethyl cellulose.

Preferably, the content of the binder material is 0.1-5% of the weight of the positive pole.

The utility model has the advantages that:

1. the utility model has simple structure, strong practicability, high multiplying power and stable charging and discharging;

2. the utility model discloses an add carbon nanotube in the positive post to control carbon nanotube's weight, the concentration of simultaneous control electrolyte material, thereby improve the medium and small power discharge performance of battery by a wide margin.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged schematic view of the present invention at A in FIG. 1;

FIG. 3 is a schematic diagram of a battery simulating motor discharge according to example 3;

in the figure, 1 is a positive electrode cap, 2 is a rubber plug, 3 is a zinc shell, 4 is a carbon rod, 5 is a positive electrode column, 6 is a negative electrode bottom, and 7 is a diaphragm.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

in the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

As shown in fig. 1 and 2, the present embodiment provides a high-rate cylindrical zinc-manganese dioxide battery, which includes a zinc shell 3, a carbon rod 4, a diaphragm 7, a negative electrode bottom 6, a positive electrode cap 1, and a positive electrode column 5, where the positive electrode column 5 is disposed in the zinc shell 3; a carbon rod 4 is also inserted into the positive pole 5, and the zinc shell 3 is of a cylindrical structure with one closed end. And the open end of the zinc shell 3 is provided with a necking, and the outer side of the rubber plug 2 is sleeved on the outer side end of the necking of the zinc shell 3. And the upper end of the carbon rod 4 is connected with the rubber plug 3, and the lower end of the carbon rod 4 is downwards inserted into the positive pole 5 and extends to the bottom end of the zinc shell 3.

Preferably, the upper end of the carbon rod 4 is connected with the positive electrode cap 1, and the lower end face of the positive electrode cap 1 is in contact connection with the upper end face of the rubber plug 2.

Preferably, the negative electrode bottom 6 is arranged outside the bottom surface of the zinc shell 3 and is in contact connection with the outer side surface of the bottom surface of the zinc shell 3.

Preferably, the positive electrode column 5 of the present embodiment is formed by compounding a three-dimensional carbon nanotube frame, a manganese dioxide material, an acetylene black material, a binder material, and an electrolyte material, and the weight of the three-dimensional carbon nanotube frame is 1 to 10% of that of the positive electrode column 5. In the embodiment, a three-dimensional framework structure of the Carbon Nano Tube (CNT) is skillfully introduced to the surface of manganese dioxide to serve as a zinc deposition/dissolution support, the electric field distribution on the surface of an electrode is more uniform due to the construction of the three-dimensional CNT framework, and the overpotential of zinc nucleation is remarkably reduced (27 mV), so that the rapid migration and uniform nucleation of zinc ions at an interface are facilitated, the generation of zinc dendrites and other byproducts is effectively inhibited, and the rate capability of the battery is obviously improved.

Preferably, the concentration of the electrolyte material is 10% to 60%, and the electrolyte in this embodiment is an aqueous solution of a weak acid and a weak base salt. It is preferably any of an aqueous solution of zinc chloride and ammonium chloride, an aqueous solution of zinc sulfate and ammonium chloride, and an aqueous solution of zinc acetate and ammonium chloride.

Preferably, a diaphragm 7 is further arranged on the inner side wall of the zinc shell 3.

Preferably, the binder material is a composite of one or more of polyacrylic acids, polyacrylic alcohols, polyacrylamide and carboxymethyl cellulose. And the content of the binder material is 0.1-5% of the weight of the positive pole 5.

Example 2

Preparation of the Battery

In the embodiment, electrolytic manganese dioxide, carbon nanotubes, acetylene black, 25% zinc chloride, 5% ammonium chloride aqueous solution and polyvinyl alcohol are uniformly mixed according to a mass ratio of 8.4. The structure of the cell is shown in fig. 1. The adhesive polyvinyl alcohol PVA of the positive pole column 5 in the embodiment belongs to an organic compound, has an adhesive effect in an electrode, and the three-dimensional carbon nanotube frame has excellent electrical properties.

Example 3

Discharge mode of battery

Simulating motor discharge in the following specific discharge mode:

the cell described in example 1 was continuously discharged with a 3.9 ohm load to a cut-off voltage, which was 0.8V, and the discharge time of the cell was recorded.

The battery is tested by discharging the battery after the battery is prepared and placed at room temperature for 1 week, and the discharging temperature of the battery is controlled at 20 +/-1 ℃.

And the existing high-capacity R6P battery, GP superbar No. 5 carbon battery and loose carbon No. 5 dry battery are selected as comparison, and the details are shown in Table 1 and figure 3. As can be seen from the cell discharge results of the examples and comparative examples, the high-rate cell of the example far exceeded the discharge time of the commercially available zinc-manganese-carbon cell.

The foregoing embodiments and description have been provided to illustrate the principles and preferred embodiments of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed.

Claims

1. The utility model provides a high magnification column zinc-manganese dioxide battery, includes zinc shell, carbon-point, diaphragm, negative pole end, positive pole cap, positive post, its characterized in that: a positive pole column is arranged in the zinc shell; a carbon rod is inserted into the positive pole; the upper end of the carbon rod is connected with the rubber plug, and the lower end of the carbon rod is inserted into the positive pole column and extends downwards to the bottom end of the zinc shell;

a necking is arranged at the opening end of the zinc shell, and the outer side of the rubber plug is sleeved on the outer side end of the necking of the zinc shell;

the upper end of the carbon rod is also connected with an anode cap, and the lower end surface of the anode cap is in contact connection with the upper end surface of the rubber plug;

the negative electrode bottom is arranged on the outer side of the bottom surface of the zinc shell and is in contact connection with the outer side surface of the bottom surface of the zinc shell.

2. The high-rate cylindrical zinc-manganese dioxide battery according to claim 1, characterized in that: the zinc shell is of a cylindrical structure with one closed end.

3. The high-rate cylindrical zinc-manganese dioxide battery according to claim 1, characterized in that: and a diaphragm is arranged between the positive post and the inner side wall of the zinc shell.