CN2676421Y

CN2676421Y - Flanged metal expanding guipure for manufacturing electrode

Info

Publication number: CN2676421Y
Application number: CNU2003201177129U
Authority: CN
Inventors: 吴爱深; 邝达辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-05
Filing date: 2003-11-05
Publication date: 2005-02-02
Anticipated expiration: 2013-11-05

Abstract

The utility model discloses a flanged metal expanding guipure used as the material of the basal body (framework) of the electrode in electrochemical power source. The flanged metal expanding guipure can be a metal conducting guipure with a plurality of holes, such as a copper mesh, an aldary mesh, a steel mesh plated by nickel, a copper mesh plated by nickel, a metal mesh plated by copper, etc. With the metal conducting guipure flanged towards one side or both sides along the long direction, the utility model has the advantages of high mechanical strength and small burrs, and the short circuit of the battery can be avoided.

Description

A kind of flanging expansion metal guipure that is used to make electrode

Technical field

The utility model relates to a kind of metallic conduction guipure, particularly a kind of flanging expansion metal guipure that is used to make electrode.

Background technology

The porous metals guipure is very extensive as the range of application of skeleton on rechargeable battery, and it is applied on the rechargeable battery and has the following advantages: basis material is light, and conductive area is big, helps fixedly active material.On-expansible guipure in the porous metals guipure, as nickel foam and Punching steel strip, through the process modification of more than ten years, the burr that can overcome the pole piece edge basically causes the problem of battery short circuit.

But bring for steel expanded mesh, because its aperture is more a lot of greatly than on-expansible guipure, so outstanding zigzag burr is arranged usually at its edge, this all brings many adverse effects for production process and product, and when for example making electrode, the expansion metal guipure is in course of conveying, the outstanding zigzag burr in its edge will hinder the transmission of guipure even be stuck, thereby production efficiency is obviously descended, and waste of material is very big, and what be unfavorable for producing carries out smoothly.Simultaneously, the expansion pole piece edge made of guipure is owing to there is tangible burr, so can cause higher battery short circuit rate.

Summary of the invention

The purpose of this utility model is to provide a kind of intensity height, is difficult for causing the flanging expansion metal guipure of battery short circuit, production efficiency and rate of finished products is all effectively improved, and reduce production costs.

For achieving the above object, the utility model adopts following technical scheme: a kind of flanging expansion metal guipure that is used to make electrode, wherein, described flanging expansion metal guipure forms expansion metal guipure one side or both sides along its length through flanging.Described expansion metal guipure is to cut out a plurality of otch by tinsel is laterally embarked on journey, in wherein adjacent two row between each otch of lastrow not cut-away portions lay respectively at the centre of each otch of next line, follow vertical tractive and cut out the sheet material after the otch and make otch become rhombus, square or fan-shaped hole.The sheet material of described incision periphery twists along with tractive, forms the frame in each hole.Described expansion metal guipure can be copper mesh, nickel screen, copper alloy net, nickel plating or copper facing wire netting.

After adopting the utility model, owing to expansion metal guipure dual-side along its length is folded into bilayer and is depressed into the thickness that approximates virgin metal expansion guipure greatly by folding brake, this moment, the guipure edge did not just have tangible burr, and mechanical strength is significantly improved.Simultaneously, in producing continuously, guipure can not be stuck, and production can be carried out smoothly.At last, make two sides of electrode, greatly reduce the short circuit ratio of battery owing to there is not tangible burr.

Description of drawings

The expansion metal guipure that Fig. 1 is used to make electrode for the utility model is the structural representation during flanging not;

Structural representation when Fig. 2 is an expansion metal guipure flanging among Fig. 1.

Embodiment

Further set forth the utility model below in conjunction with accompanying drawing.

A kind of flanging expansion metal guipure is used to make the electrode skeleton of battery, and it is drawn into through cutting by tinsel.In one embodiment of the invention, described tinsel is a Copper Foil, it can be cut out a plurality of otch along laterally embarking on journey, in wherein adjacent two row between each otch of lastrow not cut-away portions lay respectively at the centre of each otch of next line.After otch cut out, vertical tractive sheet material, described otch can be stretched as rhombus, square or fan-shaped hole as required.Simultaneously, the sheet material of incision periphery twists along with tractive, and forms the frame in each hole.The net of making like this is exactly that copper is cut and drawn in the net or the copper expansion web.

Wherein, described copper expansion web can be divided into the guipure 1 of proper width by slitting mill (perhaps banding machine), as shown in Figure 1, at this moment, because mesh is cut by slitting mill (perhaps banding machine), so will occur a lot of zigzag burrs 11 along its length at described guipure 1, fold and be depressed into the thickness that approximates former guipure 1 greatly by folding brake with its both sides of

edges limit

21,31 along its length this moment again.At this moment, the zigzag burr 11 at described guipure 1

edge

21,31 is because extremely inboard by the folding brake folding, so the expansion of the copper behind flanging guipure 2 edges just do not have tangible burr, mechanical strength is significantly improved simultaneously, as shown in Figure 2.Like this, described flanging copper expansion guipure just is difficult for causing battery short circuit, and keeps smooth and easy in producing course of conveying, thereby production efficiency and rate of finished products are all effectively improved, and has reduced production cost.

In the utility model, described expansion metal guipure can be other material, for example nickel screen, nickel plating net or copper facing net.The thickness of wherein expanding guipure is preferably in 0.05mm～0.60mm, and aperture (maximum) is 0.50mm～3.00mm, and the width of flanging part is preferably in 1.00mm～4.00mm.

Described flanging expansion metal guipure 2 can be made the positive electrode or the negative electrode of battery with dry method or wet method as skeleton.Dry method is the mixed active powder that adopts active material and additive, conductive agent, adhesive powder to form, attached to the one or both sides of flanging expansion metal guipure, and pressurized subsequently, section and make electrode.Wet method is to adopt active material and additive, conductive agent, binder solution to be made into uniform slurry, is coated to the both sides of flanging expansion metal guipure 2, makes electrode through oven dry, roll extrusion, section.

Difformity be can make as required with top electrode, for example square battery or cylindrical battery made respectively with stacked or takeup type.

Further set forth the process of using the utility model flanging expansion metal guipure to make electrode below by embodiment.

In embodiment of the utility model, described flanging expansion metal guipure 2 adopts Copper Foil to be the rhombus guipure through cutting to pull into, and at guipure two side edgefolds along its length, the short diagonal of its mesh and long-diagonal are respectively 1mm and 2.5mm, the width of two side edgefold laps is 2.5mm, and the thickness of net is 0.35mm.Then, the powder box by filling hydrogen storing alloy powder and send continuously with above-mentioned copper expansion guipure through flanging from the powder box band outlet, then identical by a pair of rotating speed immediately, the pair roller pressurization of switched in opposite, be cut into fragment afterwards, make the hydrogen negative pole and be used to be rolled into Ni-MH battery.In the utility model, the also available nickel foil of described Copper Foil replaces.

Above disclosed only is the preferred embodiment of the utility model flanging expansion metal guipure, certainly can not limit the interest field of the utility model with this, therefore the equivalent variations of being done according to the utility model claim still belongs to the scope that the utility model is contained.

Claims

1, a kind of flanging expansion metal guipure that is used to make electrode is characterized in that, described flanging expansion metal guipure forms expansion metal guipure one side or both sides along its length through flanging.

2, the flanging expansion metal guipure that is used to make electrode as claimed in claim 1, it is characterized in that: described expansion metal guipure is to cut out a plurality of otch by tinsel is laterally embarked on journey, in wherein adjacent two row between each otch of lastrow not cut-away portions lay respectively at the centre of each otch of next line, follow vertical tractive and cut out the sheet material after the otch and make otch become rhombus, square or fan-shaped hole.

3, the flanging expansion metal guipure that is used to make electrode as claimed in claim 1 or 2, it is characterized in that: the sheet material of described incision periphery twists along with tractive, forms the frame in each hole.

4. the flanging expansion metal guipure that is used to make electrode as claimed in claim 3 is characterized in that: described expansion metal guipure can be copper mesh, nickel screen, copper alloy net, nickel plating or copper facing wire netting.