CN2462553Y - Zinc-air battery having air counterflow hole - Google Patents

Abstract

The utility model relates to a zinc-air battery with an air convection hole. A positive pole is composed of a water-proof conducting ventilating cylinder 5, a catalyst layer 6 and a multi-hole flow collector; one end of the ventilating cylinder 5 is open; the other end of the ventilating 5 is closed; the open end is provided with an outer flange disk 14 on which the air convection hole 12; one end of a casing 3 is open; the other end of the casing is closed; the closed end is a positive pole end 1 which is distributed with air inlet holes 2; the multi-hole flow collector 4 which is positioned in the casing 3 to an electricity passage with the casing; the open ends of the casing 3 and the ventilating cylinder 5 are fixedly connected with a seal disc 13 of which outer edge is provided with a hole 15; the hole which corresponds to the air convection hole 12 is communicated with atmosphere. Air in the atmosphere atmospheric enters the battery from the air inlet holes 2 to form convection with the atmosphere via the multi-hole flow collector 4, the convection hole 12 and the hole 15, ensuring air quantity required by the electrochemical reaction of the battery.

Description

The zinc-air battery in band cross-ventilation hole

The utility model is relevant with zinc-air battery, and is especially relevant with the zinc-air battery in band cross-ventilation hole.

Zinc and air cell is a kind of chemical cell, is made of positive pole, negative pole, barrier film and electrolyte solution.The positive pole of this battery is that employing adsoption catalysis film is that carrier directly absorbs airborne oxygen participation exoelectrical reaction, negative pole is active very high zinc powder porous electrode, be added with barrier film between the both positive and negative polarity, in alkaline hydrogen potassium oxide medium, finish electrochemical reaction, the reaction of air electrode catalysed promoted oxygen in discharge process, and itself can not consume and change, we can say as long as air electrode keeps normal, battery capacity only is decided by the amount of negative pole zinc, makes zinc and air cell have capacity height, in light weight, characteristics that specific energy is big.In addition, it also has the wide advantages such as abundant raw materials easily obtains and steady, and is cheap of discharge voltage range, is one of rare high-energy battery kind.

It is inhomogeneous that existing zinc-air battery air enters electrode, and the air inlet can not guarantee the needs of electrochemical reaction, and battery capacity and specific energy are not high, produces inconvenience, and cost is higher.

The purpose of this utility model provides a kind of simple in structure, and is easy to manufacture, and production cost is low, and discharge performance is good, the zinc-air battery of long service life.

The utility model is achieved in that

The zinc-air battery in band cross-ventilation of the present utility model hole.Comprise positive pole, negative pole and cylindrical diaphragm that calamine cream and negative pole must constitute, air electrode just very, by waterproof conduction ventilation tube 5, the topped porous collector 4 of the Catalytic Layer 6 of ventilation tube 5 inner surfaces and ventilation tube outer surface constitutes, ventilation tube is an end opening, the tubular of one end sealing, openend has outward flange dish 14, some cross-ventilations hole 12 is arranged on the ring flange 14, it between the both positive and negative polarity cylindrical diaphragm 7, negative pole end 10 must be connected with negative pole, shell 3 is end sealing, the tubular of one end opening, blind end 1 is a positive terminal, is distributed with air admission hole 2, porous collector 4 is positioned at shell 3 and its formation electric pathway, shell 3, the openend of ventilation tube 5 and seal disc 13 are connected, the corresponding and air admission hole 2 that communicates with atmosphere in the outward flange of seal disc 13 porose 15 and cross-ventilation hole 12, porous collector 4, discharge orifice 12 and hole 15 are formed the air duct that communicates with atmosphere.

The utility model porous collector 4 is the porous foam nickel strap, and its thickness is 0.1-0.2mm, forms air duct at air admission hole 2 with between to discharge orifice 12.

The utility model ventilation tube 5 openends and seal disc 13 junctions scribble fluid sealant.

The utlity model has following characteristics:

1, air electrode has adopted new construction, waterproof conduction ventilated membrane, change into and adopt the moulding of heat pressing one-time, catalytic membrane is to adopt the high activated state cellular material technology of brushing, abandoned traditional made membrane and highly difficult formation method such as the powerful static pressure of multilayer film again, the structural design of this similar garden tubular (garden tube with garden arc cap disjunctor) mutually is more in mechanization production, the battery assembling has also been simplified, and has improved production efficiency widely.

2, on the outer wall of waterproof and breathable conduction garden tube openend, be provided with a circle outer lug boss, and dig several cross-ventilations hole thereon, simultaneously, the outward flange of sealing ring (constituting one) with negative pole end, several holes are also arranged correspondingly, thereby form air convection channel, improved the discharge performance of battery with air admission hole etc.

3, after the existing alkalescence of employing (zinc-manganese) battery overall dimension, just can adopt parts, raw material and the part tooling device of alkaline battery, improve the reliability of technology, reduce production cost again.

4, metal pool band is the nickel foam thin slice that adopts, and porous and conducting electricity is coated on the tube of waterproof and breathable conduction garden, and both having guaranteed the connection of air electrode and battery case electricity provides air duct again.

5, adopt the encapsulation technology of alkaline battery, and use own special sealing glue, anti-effectively leak-stopping alkali phenomenon, good sealing effect.

Following is accompanying drawing of the present utility model:

Fig. 1 is a structure chart of the present utility model

Fig. 2 is waterproof and breathable conduction garden tube front view

Fig. 3 is the vertical view of Fig. 2.

Following is embodiment of the present utility model:

Air electrode is with 4 to constitute by waterproof and breathable conduction garden tube 5, Catalytic Layer 6 and metal pool.Waterproof and breathable conduction garden tube is the matrix of air electrode, is formed by the thermoplastic compacting, and an end opens wide, and the other end is that a garden arc cap constitutes blind end.Catalytic Layer be with by the brushing of catalytic oxidation-reduction thing at waterproof garden tube inwall, form thin film.Metal pool band is the foam nickel strap of porous, carries out the outside (shell portion) that is placed on waterproof and breathable conduction garden tube, in the battery case 3 of packing into, with the path of its formation electricity.Battery case 3 becomes plus plate current-collecting body, by positive terminal 1 outside transmission of electric energy.Outside air is by being distributed in positive terminal 1 air admission hole 2 on every side, and through air diffusion membrane 11, metal is moored with 4 airspaces that provide, and the through whole surface of air electrode enters the electrochemical reaction zone, finishes electrochemical reaction, obtains electric energy.Be added with a circle outer lug boss in the outside of the openend of waterproof garden tube 5, and on this, dig several cross-ventilations hole.Cylindrical diaphragm 7 is packed in the tube of air electrode garden, is close to inwall, filling pasty state zinc electrodes 8 in the cylindrical diaphragm 7.Negative pole end 10 has sealing ring (there are several breach at its edge, and is corresponding with the cross-ventilation aperture), and is welded with a negative pole palpus 9, can insert in the calamine cream from worn-out mouthful of end of air electrode, becomes negative current collector, and sealing ring scribbles rubberizing, finishes cell sealing.

The waterproof and breathable conduction garden tube materials of air electrode are acetylene black, fluoroplastics, additive etc., and concrete the making is that acetylene black (13-26%), fluoroplastics (67-60%) and additive (20-14%) etc. are constantly stirred, and fully mixes.Pull the condensation product oven dry out, be crushed to (50-100 order) powder, fill in the garden tubular that is hot pressed into an end band garden arc cap in the mould.Catalytic Layer is with the evenly mixing of Mn oxide (55%～10%) of active carbon (45-90%) and chemical preparation, is modulated in the colloidal fluid again, and through stirring into rare shape liquid, brushing is used after drying, the extracting on the tube inwall of garden.The metal pool is with the thin slice that is rolled into 0.1-0.2mm with the foam nickel strap again, cuts out in flakes by dimensional requirement, is covered on the drum outer wall of garden, in the battery case of packing into.Reinstall cylindrical diaphragm, inject the pasty state calamine cream thereafter.Calamine cream is formed by alkaline electrolyte solution (22.5-28.5%) modulation of metal zinc (66～66.5%), corrosion inhibiter (9～4%), bonding agent (7～1.5%), water absorbing agent (1.5～0.5%) and band zinc oxide.Be welded with negative pole on the negative pole end and must and have sealing ring, insert calamine cream, the air electrode opening end is sealed up (breach on the sealing ring limit aligns with the cross-ventilation hole).

Claims (2)

1, a kind of zinc-air battery with the cross-ventilation hole.Comprise positive pole, negative pole and cylindrical diaphragm that calamine cream and negative pole must constitute, it is characterized in that just very air electrode, by waterproof conduction ventilation tube (5), the topped porous collector (4) of the Catalytic Layer (6) of ventilation tube (5) inner surface and ventilation tube outer surface constitutes, ventilation tube is an end opening, the tubular of one end sealing, openend has outward flange dish (14), some cross-ventilations hole (12) is arranged on the ring flange (14), it between the both positive and negative polarity cylindrical diaphragm (7), negative pole end (10) must be connected with negative pole, shell (3) is end sealing, the tubular of an end opening, and blind end (1) is a positive terminal, be distributed with air admission hole (2), porous collector (4) is positioned at shell (3) and its formation electric pathway, shell (3), and the openend of ventilation tube (5) and seal disc (13) are connected, the outward flange of seal disc (13) porose (15) is corresponding with cross-ventilation hole (12) and communicate air admission hole (2) with atmosphere, porous collector (4), discharge orifice (12) and hole (15) are formed the air duct that communicates with atmosphere.

2, zinc-air battery according to claim 1 is characterized in that said porous collector (4) is the porous foam nickel strap, and its thickness is 0.1-0.2mm, keep away pore (2) and to discharge orifice (12) between form air duct.

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