CN102501464A

CN102501464A - Lead-acid accumulator assembled by pole plate with frame-cast, screened and pasted lead-plastic compound grid

Info

Publication number: CN102501464A
Application number: CN2011103464288A
Authority: CN
Inventors: 李平
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-07
Filing date: 2011-11-07
Publication date: 2012-06-20
Anticipated expiration: 2031-11-07
Also published as: CN102501464B

Abstract

A lead-acid accumulator assembled by a pole plate with a frame-cast, screened and pasted lead-plastic compound grid is disclosed. Because of the utilization of a plastic grid which has no problem of oxidative deterioration due to no participation in electrochemical reaction in an environment that the accumulator is repeatedly charged and discharged for a long time, the long-time stable existence of the grid is ensured. Lead foils glued and compounded on the two surfaces of a plastic matrix are converted to a lead dioxide conductor after electrochemical oxidization, and the conductor is firmly attached to the plastic matrix to keep stable under the powerful action of an adhesive. The two stabilizations ensure the long-time conductive function of the grid and the long-time stable and invariable grid-shaped structure of the grid, and active substances attached to the grid are impossible to fall off due to the support of the grid and the protection of a mesh; and because of no falling-off of the active substances of positive pole, the scrapping conditions of the lead-acid accumulator are inexistent, and the service life of the accumulator can be greatly prolonged due to the long-time stable existence of a positive plate.

Description

A kind of lead-plastic clad plate grid casting frame screening is coated with the lead-acid accumulator of cream pole plate assembling

Technical field:

The invention belongs to the lead-acid accumulator technical field.

Background technology:

Special invention lead-sour battery had nearly 150 years so far from Pulan in 1859, along with science and technology development and people to the widening of its application, the structure of lead-acid battery, manufacturing approach and technology are updated and are perfect, the performance of battery improves a lot.Lead-acid battery is the maximum kind the widest with application of output in the secondary chemical sources of electric energy always.Monomer lead-sour battery is made up of positive plate, negative plate, sulfuric acid, dividing plate, housing and seal cover etc.Both positive and negative polarity welds respectively in groups; Comprise bus-bar and pole; Being coated with the cream pole plate is the pole plate form that extensively adopts in the lead-sour battery; Advantages such as the utilization rate of big, the available heavy-current discharge of true specific area, active material with active material is high, manufacture craft is simple and cheap, but have also that mechanical strength is low, the charge and discharge process active material is prone to come off and shortcoming such as the life-span is short.We know that the grid that lead-sour battery industry uses mostly adopts lead-antimony alloy, lead-calcium alloy to establish die cast and form in the battery pole plates production process.Shown in figure (1); Grid is designed to frame structure, and its effect is (1) collector, i.e. frame and rib through grid compiles, distribution and conductive electric current.(2) support active material, promptly through the frame and the rib of grid, particularly horizontal rib plays a supportive role to active material.No matter be the lead-antimony alloy grid, or lead-calcium alloy slab lattice under anodal condition because the carrying out repeatedly of charge and discharge process, all bad reaction can take place for guaranteeing other metallic element that casting technique adds when the battery operate as normal, influence battery life.As material of main part-lead steady chemical structure under the negative pole condition of grid, no problem generation.Under anodal condition repeatedly discharge and recharge chemical reaction in, grid material itself carries out oxidation reaction; Molecule constantly absorbs water, drainage procedure; Molecular structure produces electrochemical change, and lead molecule progressively is converted into brown lead oxide, loses original rock-steady structure between material molecule; The structure Su Song that becomes, the intermolecular adhesion that loses.Externally have under the condition of vibrations; Being attached to active material on the rib festers with rib and comes off; The material that comes off is constantly accumulated at housing bottom, fill full just-negative plate between the slit, bottom cause short circuit between the battery positive and negative electrode, therefore battery loses function of use.This shows; Cause lead-short reason of sour battery life just to be; The one, the problem of oxidation of anode plate grid, the inner connectivity problem of shape material of living besides.

Summary of the invention:

We have proposed brand-new settling mode, " a kind of lead-plastic clad plate grid casting frame screening is coated with the lead-acid battery of cream pole plate assembling ".It selects the grid of lead-plastic composite materials as pole plate for use, and the intermediate of grid is a sheet plastic, and it is the lead foil of pure stereotype calendering that gluing is compounded in what mould the plate two sides, is a kind of trilaminate material complex.Pure lead material guaranteed battery electric conductivity, with the cohesive of lead plaster, avoided battery simultaneously in use, the bad reaction that other metallic element produces when electrochemical reaction.Plastic in the interlayer has corrosion-resistant, oxidation resistant characteristic.Composite board forms composite grid behind cut-parts, stamping, founding fuses into one at the pure lead frame and the lead foil at grid edge, has guaranteed the electric conductivity of grid.The pure lead frame at screen edge can with other pole plate assembly welding in groups; Guaranteed the manufacturability of grid; The lead material on surface and the cohesive of lotion are good, and the polypropylene nitrile screen cloth that is installed at when being coated with cream in the lead plaster can be with the lotion of coating on the grid, firm being condensated as a whole after drying.Adopt the lead-sour battery of this kind method assembling, pole plate is because the matrix of grid is plastics, and plastics are not participated in chemical reaction at sour environment; Especially under lead-sour anode part repeated charge environment, do not participate in electrochemical reaction, do not have the oxidation deterioration situation to take place, gluing is compound in the lead foil of moulding the plate two sides; Slowly be converted into brown lead oxide after the electrochemical reaction; Because the existence of adhesive, it is constant that material has become bond effect, and bonding material on it can not come off.So grid material Stability Analysis of Structures.Because the polypropylene nitrile screen cloth material that is installed in the lotion also is plastics, does not participate in electrochemical reaction, Stability Analysis of Structures equally.These two stable normal long-term uses that guaranteed lead-sour battery.The grid main body is used plastics instead simultaneously, and consumption of lead greatly reduces, and the battery finished weight is corresponding to be alleviated.The serviceability of lead-sour battery is constant, the life-span prolongation.

Description of drawings:

Fig. 1 is original plumbous antimony-plumbous calcium grid structural representation.

Fig. 2 is lead-plastic clad plate grid material structural representation.

Fig. 3 is the plumbous border structure sketch map of casting.

Fig. 4 is lead-plastic clad plate grid overall structure sketch map.

Fig. 5 is a polypropylene nitrile screen cloth structural representation.

Fig. 6 is the electrode plate structure sketch map that forms behind the grid coating paste screening.

The specific embodiment:

At first we select the polytetrafluoroethylene rolling sheet material of wide 500mm, thick 1mm for use, the calendering lead foil coiled material of wide 500mm, thick 0.10-0.15mm, and it is compound on the press mold machine, to carry out single spreading, processes single face lead and moulds composite sheet.Turning over, it is compound to carry out gluing at the another side of thin plate with the calendering lead foil coiled material of the thick 0.10-0.15mm of wide 500mm, processes three-layer composite board.Cut in flakes by certain specification then.The good punch die of installation and design on punch press, punching out go out the lead-plastic clad plate grid of shape.Shown in figure (2): the front of grid is the geometric surface that regular hexagon that to wash away n the length of side be 2mm appears after partly; The muscle of grid is wide for 1mm can see that from figure (2) f-f grid middle (1) is the polytetrafluoroethylene material, and its both sides (2) are firm compound calendering lead foils on it behind the gluing.We have obtained a slice and not only can conduct electricity but also oxidation resistant plumbous plastic clad plate grid from the material of institute's materials used.Leave nonconducting plastic cross section on the not enough section that is, punches out, we are grid dipping conducting resinl, dry laggard electroplating, and just having obtained surperficial after lead plating is accomplished all is the composite grid of plumbous material.Next step establishes mould with plumbous casting grid frame.Shown in figure (3); Grid top after casting is accomplished be cast with assembly welding sheet (3) can with battery bus-bar assembly welding in groups, the frame of grid (4) is a central slot shape, the position that reserves is just in time moulded grid with lead and is loaded on wherein that founding is integral.Composite grid after casting is accomplished can find out that (1) is polytetrafluoroethylene sheet material like figure (4) on scheming, (2) are that gluing is compound in the calendering lead foil on the sheet material, and (3) are plumbous matter assembly welding sheets, and (4) are the plumbous frames of casting.Plumbous plastic clad plate grid have been arranged, and what next step carried out is on grid, to be coated with cream, is coated with cream and prolongs the method with in the past, different shown in figure (5); Coating, adding multiple polypropylene nitrile screen cloth on the not dried cream face, adding and to cut out good screen cloth by specification when multiple and be pressed into the following 0.5mm of cream face gently, surperficial lotion is being wipeed off got final product then with spatula.Add to answer and add multiple another side again into simultaneously turning over.Pole plate after the completion is shown in figure (6); (1) polytetrafluoroethylene grid, (2) are compound in polypropylene nitrile screen cloth, (6) sunk in the cream in calendering lead foil, (3) plumbous casting assembly welding sheet, (4) grid frame, (5) on the grid and are applied to the lotion on the grid.The pole plate that adds after multiple screen cloth is accomplished drenches acid or pickling processing, and remaining operation is identical with the existing technology of electric material industry, no longer narration.Lead-sour battery with this pole plate assembling changes plastics into owing to the grid main body, the screening protection of active material surface, and prolong the service life of lead-sour battery.

Claims

1. the lead-acid battery of described " a kind of lead-plastic clad plate grid casting frame screening is coated with the lead-acid battery of cream pole plate assembling " especially a kind of lead-plastic clad plate grid assembling is characterised in that the grid material of pole plate is the polytetrafluoroethylene thin plate that thickness is no more than 1mm; Be no more than 0.10-0.15mm calendering lead foil with thickness; In the middle of gluing is combined into is plastics, and the two sides is the three-layer composite board of lead foil.

2. according to claim 1: described " a kind of lead-plastic clad plate grid casting frame screening is coated with the lead-acid battery of cream pole plate assembling " screen cloth material of screening when being coated with cream can be that the longitude and latitude of yarn is not less than 1mm at interval, is not more than gauze or the screen cloth of 2mm.