CN1635660A

CN1635660A - Alkaline colloid zinc-air battery

Info

Publication number: CN1635660A
Application number: CN 200310112986
Authority: CN
Inventors: 曹文云
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-26
Filing date: 2003-12-26
Publication date: 2005-07-06

Abstract

The invention discloses a colloid zinc-air battery, wherein a positive electrode is formed by putting a metal shell or a metal mesh with air holes, waterproof and breathable conductive powder and catalytic powder into a forming die clamp for pressing; the negative current collector penetrates into the negative shell and is sealed by epoxy resin glue, zinc glue is placed into the negative shell and is laid flat, a glue isolation layer is injected on the surface of the zinc glue, and the positive electrode is buckled. The waterproof breathable conductive powder comprises 40-60% of polytetrafluoroethylene and 60-40% of acetylene black; the polytetrafluoroethylene in the catalytic powder accounts for 8-40%. The alkaline colloid isolation layer is prepared from agar, carageenan, and 6-10M potassium hydroxide (KOH) solution; the negative current collector is a silver-plated or tin-plated copper wire with the diameter of 0.6-1.5 mm; the battery with the structure can keep the good performance of the zinc-air battery, can solve the problem of battery sealing leakage, has simple process and low price, and is suitable for batch production.

Description

Alkaline colloid zinc-air battery

Technical Field

The invention relates to a battery, in particular to an alkaline colloid zinc-air battery, belonging to the field of battery manufacturing.

Background

The zinc-air battery has attracted extensive attention because of its characteristics of large capacity, high energy ratio, stable working voltage, easily available and cheap materials, etc. Great progress is made in the aspects of square zinc-air batteries, cylindrical zinc-air batteries and button zinc-air batteries, but due to the limitation of the structure, materials and size of the batteries, the currently reported zinc-air batteries are complex in manufacturing process, high in requirements on production equipment and not suitable for large-scale production. The 4-R25 type road battery assembled by the zinc-manganese dry battery has low discharge capacity and heavy weight, and needs frequent replacement and maintenance, which brings troubles to people.

Therefore, the alkaline colloidal zinc-air battery which has simple process, good sealing and leakage-proof performance and high discharge capacity and is convenient for batch production is urgently needed to be developed to meet the market demand.

Disclosure of Invention

The invention mainly aims to provide an alkaline colloid zinc-air battery with good sealing and leakage-proof performance and high discharge capacity, which does not need to be replaced frequently during use.

The invention also aims to provide an alkaline colloidal zinc-air battery to achieve simple process and batch production.

The purpose of the invention is realized as follows:

a colloid zinc-air battery at least comprises an air electrode, a zinc electrode, an alkaline colloid isolating layer, a negative electrode current collector, a positive electrode shell and a negative electrode shell; the positive electrode is formed by putting a metal shell or a metal net with air holes, waterproof breathable conductive powder and catalytic powder into a forming die clamp for pressing; the negative current collector penetrates into the negative electrode shell and is sealed by epoxy resin glue, zinc glue is put into the negative electrode shell and is paved, a glue isolation layer is injected on the surface of the zinc glue, and the positive electrode is buckled.

In the alkaline colloidal zinc-air battery, the waterproof breathable conductive powder comprises 40-60% of polytetrafluoroethylene and 60-40% of acetylene black; the polytetrafluoroethylene in the catalytic powder accounts for 8-40%.

The alkaline colloid separation layer is prepared from agar, carageenan and 6-10MKOH solution.

In the alkaline colloidal zinc-air battery, the negative current collector is a silver-plated or tin-plated copper wire with the diameter of 0.6-1.5 mm.

Compared with the prior art, the invention has obvious advantages and beneficial effects.

The invention provides an alkaline colloid zinc-air battery with a novel structure. The battery with the structure can keep the good performance of the zinc-air battery. But also can solve the problem of leakage of battery seal, without mechanical sealing, with simple process and low cost. The battery assembled by the battery for the highway of the 4-R25 type alkaline colloid zinc-air battery has large capacity. The production equipment has the characteristic of strong universality and is particularly suitable for large-scale industrial production.

Drawings

Fig. 1 is a cross-sectional view of an alkaline colloidal zinc-air cell.

Fig. 2 is a schematic structural view of a 4-R25 type alkaline colloidal zinc-air battery power block for a road assembled with the alkaline colloidal battery of the present invention.

Detailed Description

The invention is described in further detail below with reference to the following figures and specific examples:

referring to fig. 1, a cross-sectional view of an alkaline colloidal zinc-air battery is shown; the alkaline colloid battery comprises an air electrode 2, a colloid isolation layer 4, zinc gel 5, a metal shell or metal net 1 with air holes 3, a negative current collector 6, a negative plastic shell 7, a positive terminal 8 and epoxy resin sealant 9.

When in manufacturing, the nickel or silver plated steel shell with holes or the conductive net (nickel or silver plated metal net) 1, the waterproof and breathable conductive powder (made of 40-60% of polytetrafluoroethylene and 60-40% of acetylene black) and the catalytic powder (active carbon, manganese dioxide and 8-40% of polytetrafluoroethylene) are sequentially placed into a forming die clamp and pressed into the positive electrode. The negative electrode plastic shell 7 is internally provided with zinc glue 5 (prepared by 8-10MKOH solution of zinc powder and sodium polyacrylate special for the battery), the surface of the zinc glue 5 is injected with alkaline colloid (prepared by 8-10MKOH solution of agar and carrageenin) to be used as a colloid isolating layer 4, and the battery can be assembled by buckling the positive electrode.

The method for manufacturing the power block of the 4-R25 type alkaline colloidal zinc-air battery for the road assembled by the colloidal zinc-air battery of the invention is further described in detail as follows:

referring to fig. 1, an anode nickel-plated steel case with air holes 3, 1 g of waterproof air-permeable conductive powder (prepared by mixing, stirring and drying 40% acetylene black and 60% polytetrafluoroethylene), 10g of catalytic powder (prepared by mixing and drying 85% manganese dioxide-loaded activated carbon and 15% polytetrafluoroethylene), and spreading in a forming mold clamp at 200Kg/cm ² A positive electrode with a thickness of 4mm was made under pressure. The silver-plated copper wire 6 with the diameter of 0.8 penetrates into the negative pole plastic shell 7, and the joint of the copper wire and the negative pole plastic shell 7 is sealed by epoxy resin 9. Zinc gel 5 (96% of special zinc powder for batteries, 4% of sodium polyacrylate and prepared by using 9MKOH solution) is injected into the negative electrode plastic shell 7 and is paved. Injecting alkaline colloid (prepared by adding water into 60% agar, heating to melt, mixing with 40% carageenan and 9MKOH solution), spreading to obtain colloid isolation layer 4 with thickness of 3.5mm, and covering with positive electrode to obtain the final product.

Referring to fig. 2, four batteries manufactured as above are connected in series to form a 4-R40 type power block for a road, a layer of nickel foam 12 with a thickness of 1.5mm is placed between each single battery 10 and a plastic cylinder 13, the single batteries 10 are connected by a wire, and the whole is placed in the plastic cylinder 13. And (3) placing a ventilating partition plate 14 on the upper part of the assembled battery, welding a positive electrode lead 16 and a negative electrode lead 17, and welding and sealing a plastic cover 15 with the ventilating holes 9 and the plastic cylinder 13 by ultrasonic waves. External dimension of assembled battery: the length is 66mm, the width is 66mm, and the height is 110mm. The open-circuit voltage of the battery is 6V, the battery is continuously discharged at 9.1 ohms under standard conditions, the discharge capacity is larger than 35AH, and the average discharge voltage is higher than 4.8V. The capacity of the power supply block of the 4-R25 type alkaline colloid zinc-air battery is 4 times of that of the 4-R25 type zinc-manganese battery used on the existing road.

Finally, it should be noted that: the above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention; thus, while the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted; all such modifications and variations are intended to be included herein within the scope of this disclosure and the present invention and protected by the following claims.

Claims

1. A colloid zinc-air battery at least comprises an air electrode, a zinc electrode, an alkaline colloid isolation layer, a negative current collector, a positive electrode shell and a negative electrode shell; the method is characterized in that: the positive electrode is formed by putting a metal shell or a metal net with air holes, waterproof and breathable conductive powder and catalytic powder into a forming die clamp and pressing; the negative current collector penetrates into the negative shell and is sealed by epoxy resin glue, zinc glue is put into the negative shell and is paved, a glue isolation layer is injected on the surface of the zinc glue, and the positive electrode is buckled.

2. The alkaline colloidal zinc-air battery of claim 1, wherein: the waterproof breathable conductive powder comprises 40-60% of polytetrafluoroethylene and 60-40% of acetylene black.

3. The alkaline colloidal zinc-air battery of claim 1, wherein: the polytetrafluoroethylene in the catalytic powder accounts for 8-40%.

4. The alkaline colloidal zinc-air cell of claim 1, wherein: the alkaline colloid isolation layer is prepared from agar, carageenan, and 6-10MKOH solution.

5. The alkaline colloidal zinc-air battery of claim 1, wherein: the negative current collector is a silver-plated or tin-plated copper wire with the diameter of 0.6-1.5 mm.