CN102629689B

CN102629689B - Production method of lead-coated copper plate grid of lead acid storage battery and special combined mould

Info

Publication number: CN102629689B
Application number: CN201210107216.9A
Authority: CN
Inventors: 隋明奎; 苗维新
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-04-13
Filing date: 2012-04-13
Publication date: 2014-05-28
Anticipated expiration: 2032-04-13
Also published as: CN102629689A

Abstract

The invention discloses a production method of a lead-coated copper plate grid of a lead acid storage battery. The specific production method comprises the following steps of: closing and fixing a mould A and a mould C; heating to 120-140 DEG C; casting for the first time to form a lead layer with a groove; after cooling molten lead and the moulds, removing the mould C from the mould A; holding a copper wire serving as a copper plate grid in the groove of the copper layer; heating a mould B with the groove to 120-140 DEG C; closing and fixing the mould A and the mould B; and casting for the first time to construct the lead-coated copper plate grid of which the surface is completely covered by lead. The special combined mould of the production method is provided with the mould A and the mould B which are mutually corresponding to each other, and has the special points of being provided with the mould C which is matched with the mould A for use, wherein the inner surface of the mould C is provided with a convex edge which is matched with the groove on the mould A; the size of the cross section of the convex edge is less than that of the cross section of the groove on the mould A; and the diameter of the cross section of the convex edge is the same as that of the copper wire of the copper plate grid.

Description

Lead-acid Storage Battery bag method for producing copper sheet grating and Special-purpose combined die

Technical field

The invention belongs to storage battery production field, particularly a kind of Lead-acid Storage Battery bag method for producing copper sheet grating and Special-purpose combined die.

Background technology

At present, lead acid accumulator still occupies certain advantage in the market share of storage battery, is bringing into play irreplaceable important function in all departments of national economy.The theoretical specific energy of lead acid accumulator is 170Wh/kg, but in fact most of lead acid accumulators can only discharge the energy of 30 ~ 50 Wh/kg, this causes by active material utilization is low on the one hand, to be caused by the quality of inert component on the other hand, as battery case, pole plate grid, barrier film, terminal etc.Particularly, as the pole plate grid that support active material, the main performance of storage battery is had to considerable influence.In order to improve the specific energy of lead acid accumulator, people explore always and find a kind of new grid material and grid structure, to the quality with minimum and minimum price, obtain maximum conductivity and the highest intensity.Lead plating copper coin grid have been subject to people's common concern in recent years, and it is to make matrix with copper mesh, and the coated one deck lead in surface, to reduce grid resistance, improves power output, and the grid of this structure is also known as copper coin grid.At present, on copper mesh, coated plumbous method has three kinds: immersion plating, spraying plating and plating.Immersion plating is exactly to put into plumbous liquation as the copper mesh of matrix, after the surface of copper mesh hangs up one deck lead, takes out.The problem that immersion plating production technology exists is, the lead layer that matrix surface hangs up is thinner, and hang plumbous after the surface irregularity of grid, practical effect is poor.Spraying plating is exactly the surface that lead is sprayed on to matrix, and the problem that this processing method exists is, grid lead layer uneven distribution is even, and the compactness of lead layer is also poor, in the process using, easily comes off.Plating is exactly to adopt the plated surface last layer lead of common electric plating method at matrix.The manufacturing cost of this method is very high, because the coated plumbous thickness in grid surface generally should be 100 μ m～300 μ m, the lead of electroplating 100 μ m～300 μ m on matrix needs to spend long time, thereby does not possess the value that heavy industrialization is implemented.Although said method can be coated on the surface of matrix one deck lead, and produce surface and be coated with the copper coin grid of lead layer, but do not have a kind of method to produce high-quality copper coin grid with cheap cost, and be suitable for large-scale industrial production, therefore, the development of copper coin grid has become an important subject in lead acid accumulator production field.

In order to address the above problem, I have developed a kind of method and particular manufacturing craft that adopts casting technique to produce copper sheet grating of lead acid battery, and applied for that Chinese invention patent, the patent No. are " ZL200410100486.2 ", name is called " Lead-acid battery copper plate grid production method and special molds ".This patent adopts the matrix of copper mesh as copper coin grid, and copper mesh is produced by modes such as line cutting or punching presses, and copper mesh is located with locating lead ring and pilot pin in mould, and to guarantee that copper mesh is positioned at the centre of mould, and it is even to make to cast the lead layer thin and thick on rear copper mesh surface.Although the compactness of the copper coin grid lead layer that the method is produced is good, thickness is unrestricted, and conforming product rate is high, and production cost is still higher, and is difficult to realize large-scale industrial production.Its main cause is: 1, copper mesh adopts copper sheet material to make, and the utilance less than 10 of material exceedes 90 percent raw material and becomes copper scrap, but also need to carry out moulding through line cutting or punching press, and production cost is relatively high.2, copper mesh will be installed several location lead rings putting into before mould, because the thickness of copper mesh is very thin, so will make copper mesh remain on the centre of mould, just need to install a lot of location lead rings, location lead ring is installed and will be expended a lot of man-hours, production efficiency is lower.3, because the thickness of copper mesh is very thin, so also need to install and much pilot pin be located copper mesh on mould, and the diameter of pilot pin is very little, the difficulty of holing on mould is just larger, drill bit also easily fractures, the height of needle point also must be consistent, and the difficulty of assembling is larger, thereby the making of mould also needs just can complete a lot of man-hours.4, owing to there being a lot of pilot pins in mould, these pilot pins are all embedded in lead layer after casting, although needle point is taper, molding is also relatively required great effort, and dynamics is grasped the bad lead layer that also easily damages.5,, owing to there being a lot of pilot pins in mould, so can leave a lot of pin holes on the lead layer of copper coin grid after casting, these pin holes also need closure, just can become copper coin grid finished product.The existence of the problems referred to above has caused this patent to be difficult to realize large-scale industrial production.

Summary of the invention

The technical problem to be solved in the present invention is, overcome the problem that the production cost that existing method for producing copper sheet grating of lead acid battery and mould exist is high, be difficult to large-scale industrial production, a kind of production cost is low, be suitable for large-scale industrial production Lead-acid Storage Battery bag method for producing copper sheet grating and Special-purpose combined die are provided.

The present invention adopts the method production Lead-acid Storage Battery copper-clad grid of casting, and its concrete production method is:

1, by with reeded mould A with close up fixing with the mould C of fin;

2, fixing mold heated to 120 ℃～140 ℃ will be closed up;

3, plumbous liquation is cast in mould A and mould C, casts for the first time, utilize the formation of the gap between fin in mould A further groove and mould C to be with reeded lead layer;

4, after plumbous liquation and mold cools down, open mould, mould C is taken off from mould A, be retained in reeded lead layer in the groove of mould A, remove the casting gate part of lead layer;

5, in the groove of lead layer, pack the copper wire as copper coin grid into;

6, by being with reeded mould B to be heated to 120 ℃～140 ℃, then, mould A and mould B are closed up fixing;

7, plumbous liquation is cast in mould A and mould B, casts for the second time, plumbous liquation is full of to the gap between mould B further groove and copper wire, copper wire is wrapped up completely, form the sheath copper coin grid that surface is covered by lead completely;

8, after plumbous liquation and mold cools down, open mould, take out and cast plumbous sheath copper coin grid blank, remove air flue burr and the casting gate at sheath copper coin grid blank edge, become sheath copper coin grid finished product.

A kind of Special-purpose combined die of implementing above-mentioned Lead-acid Storage Battery bag method for producing copper sheet grating, it has two moulds of correspondence mutually, be mould A and mould B, on the surface of mould A and mould B inner side, there is shape identical, cross sectional dimensions is greater than the groove of copper coin grid copper wire, this groove is some transverse concave grooves and some longitudinal flutings, its special character is, the present invention also have one with mould A match use mould C, on the surface of mould C inner side, there is the fin matching with mould A upper groove, the cross sectional dimensions of this fin is less than the cross sectional dimensions of mould A upper groove, the cross-sectional diameter of this fin is identical with the diameter of copper coin grid copper wire.

Fin on described mould C inner surface is a horizontal fin and some longitudinal fins, and laterally fin is positioned at the upper end of longitudinal fin.

The invention has the advantages that:

1, adopt the matrix of copper wire as copper coin grid, greatly improved the utilance of material, reduced the use amount of copper, thereby significantly reduced production cost, improved economic benefit, and selection is easy, copper wire need not be processed, and after shearing, directly uses, and has simplified production technology.

2, on mould, do not need to install pilot pin, simplified the production of mould, on copper wire, do not need to install location lead ring, after molding, do not need flat pin hole yet, reduced production process, fallen at the end difficulty of producing, improve production efficiency, thereby realized the large-scale industrial production of copper coin grid.

3, by secondary casting, copper wire is cast in accurately to the center of lead layer, guarantee that lead layer thin and thick is even, do not leak copper phenomenon, and the thickness of lead layer is unrestricted, the compactness of lead layer is good, and the qualification rate of product is high, thereby produces high-quality copper coin grid.

Accompanying drawing explanation

Fig. 1 is the structural representation of mould A of the present invention;

Fig. 2 is A-A cutaway view of Fig. 1;

Fig. 3 is B-B cutaway view of Fig. 1;

Fig. 4 is the structural representation of mould B of the present invention;

Fig. 5 is C-C cutaway view of Fig. 4;

Fig. 6 is the structural representation of mould C of the present invention;

Fig. 7 is the left view of Fig. 6;

Fig. 8 is D-D cutaway view of Fig. 6;

Fig. 9 is the cross section view of mould A of the present invention and mould C;

Figure 10 is the cross section view of mould A of the present invention and mould B;

Figure 11 is the E portion enlarged drawing of Fig. 9;

Figure 12 is the F portion enlarged drawing of Figure 10.

Embodiment

1, by with reeded mould A with close up fixing with the mould C of fin;

2, fixing mold heated to 120 ℃～140 ℃ will be closed up, in the time of practical operation, if adopt the method for common casting, the temperature of mould should approach plumbous melting temperature, both guaranteed the plumbous good mobility that has in mould, be unlikely again casting rear mold temperature fall time oversize, the present invention adopts the method for die casting to cast, mold heated to 120 ℃～140 ℃ can be cast, when practical operation, the heating-up temperature of mould A and mould C can be according to the size of mould, and determine within the scope of 120 ℃～140 ℃ with the gap length between the groove of mould A and the fin of mould C, if mould is large, and the gap between the fin of the groove of mould A and mould C is little, the heating-up temperature of mould A and mould C should be in temperature range capping value, otherwise should take off limit value,

3, plumbous liquation is cast in mould A and mould C, casts for the first time, utilize in mould A further groove and mould C the gap between fin to form and be with reeded lead layer, this lead layer is a side of sheath copper coin grid;

5, in the groove of lead layer, pack the copper wire as copper coin grid into, copper wire will be installed smooth, can not have bending, upwarp;

6, will be with reeded mould B to be heated to 120 ℃～140 ℃, then, mould A and mould B are closed up fixing, when practical operation, the heating-up temperature of mould B can be according to the size of mould, and determines within the scope of 120 ℃～140 ℃ with the gap length between copper wire in mould and the groove of mould B, if mould is large and mould in gap between copper wire and the groove of mould B little, the heating-up temperature of mould B should be in temperature range capping value, otherwise should take off limit value;

7, plumbous liquation is cast in mould A and mould B, cast for the second time, plumbous liquation is full of to the gap between mould B further groove and copper wire, form another side of sheath copper coin grid, thereby copper wire is wrapped up completely, form the sheath copper coin grid that surface is covered by lead completely;

8, after plumbous liquation and mold cools down, open mould, take out two sides and all cast plumbous sheath copper coin grid blank, remove air flue burr and the casting gate at sheath copper coin grid blank edge, become sheath copper coin grid finished product.

Implement the Special-purpose combined die of above-mentioned Lead-acid Storage Battery bag method for producing copper sheet grating as shown in Fig. 1-Figure 12, it has two moulds of correspondence mutually, be mould A and mould B, on the surface of mould A and mould B inner side, there is the groove that shape is identical, cross sectional dimensions is greater than copper coin grid copper wire, this groove is some transverse concave grooves 4 and some longitudinal flutings 3, crossing in length and breadth between transverse concave groove 4 and longitudinal fluting 3, transverse concave groove 4 is semicircle with the shape of cross section of longitudinal fluting 3, also can be rectangle or other shapes, can determine as required; There is a transverse concave groove 2 in the top of mould A, the degree of depth of transverse concave groove 2 is greater than following transverse concave groove 4, because not only will wrap up the copper wire 12 of longitudinal setting herein, also to wrap up the copper wire 12 of horizontally set, therefore, the degree of depth of transverse concave groove 2 can be determined according to the diameter of copper wire 12, and the degree of depth of all transverse concave grooves 4 of mould B is all identical, it is the circular copper wire matrix as copper coin grid that the present invention adopts cross section, also can adopt the copper wire of other shape of cross sections as the matrix of copper coin grid when practical application; Top at mould A and mould B inner surface also has two suspension member grooves 5, and suspension member groove 5 is connected with transverse concave groove 4 and longitudinal fluting 3; Top at mould A and mould B inner surface also has a casting gate 1, and casting gate 1 is connected with transverse concave groove 2 and the mould B transverse concave groove 4 topmost of mould A, and corresponding with two longitudinal flutings 3 of mould A and mould B; Also have a lug groove 6 on the top of mould A and mould B, lug groove 6 is connected with transverse concave groove 2 and the mould B transverse concave groove 4 topmost of mould A, and corresponding with a longitudinal fluting 3, so that cast out lug in the time of casting; The present invention also have one with mould A match use mould C, on the surface of mould C inner side, have some with mould A on longitudinal fin 7 of matching of longitudinal fluting 3, longitudinally the shape of cross section of fin 7 is semicircle, longitudinally the cross-sectional diameter of fin 7 is determined according to the diameter of copper wire 12, longitudinally the diameter of fin 7 is identical with the diameter of copper wire 12, or be slightly less than 0.05～0.1 millimeter of the diameter of copper wire 12, so that the lead layer groove forming after casting can clamp copper wire 12, avoid copper wire 12 to upwarp; Few two than the longitudinal fluting 3 on mould A of longitudinal fins 7 on mould C, so that respectively form a complete plumbous frame 10 in the both sides of sheath copper coin grid after having cast, frame 10 is formed by twice casting, casting for the first time only forms frame 10 half, as shown in Fig. 9 and Figure 11, after casting, form complete frame 10, as shown in Figure 10 and Figure 12 for the second time; On the surface of mould C inner side, also have one with mould A on the horizontal fin 8 that matches of transverse concave groove 2, laterally the top of the cross section of fin 8 is semicircle, bottom is rectangle, laterally the radius at fin 8 tops and the width of bottom are identical with the diameter of copper wire 12, or be slightly less than 0.05～0.1 millimeter of the diameter of copper wire 12, so that the lead layer groove forming after casting can clamp copper wire 12, avoid copper wire 12 to upwarp; Laterally the height of fin 8 will be higher than longitudinal fin 7, the size exceeding is determined by the diameter of copper wire 12, because should place the copper wire 12 of horizontally set in the lead layer groove forming after casting for the first time herein, also to place the copper wire 12 of longitudinal setting, the copper wire 12 of horizontally set will overlap mutually with the copper wire 12 longitudinally arranging, to guarantee that both contact well; Laterally fin 8 is positioned at the upper end of longitudinal fin 7, laterally 8 of fins arrange one, the copper wire 12 of a horizontally set is only set in sheath copper coin grid, to save copper product, the copper wire 12 of a horizontally set can collect the electric current on some the copper wires 12 that longitudinally arrange, and what in mould A and mould B, in other transverse concave grooves 4, cast out is all the full lead block body that does not contain copper wire 12; The cross sectional dimensions of described longitudinal fin 7 is less than the cross sectional dimensions of the upper longitudinal fluting 3 of mould A, laterally the cross sectional dimensions of fin 8 is less than the cross sectional dimensions of the upper transverse concave groove 2 of mould A, both differences are the thickness of lead layer 11, can determine according to actual needs, lead layer 11 forms by second casting, casting for the first time forms is with reeded half lead layer 11, as shown in Fig. 9 and Figure 11, casting for the second time forms complete lead layer 11, copper wire 12 is wrapped up completely, as shown in Figure 10 and Figure 12; On the surface of mould C inner side, also have a lug fin 9, lug fin 9 is positioned at the top of horizontal fin 8, and corresponding with a longitudinal fin 7.

Claims

1. a Lead-acid Storage Battery bag method for producing copper sheet grating, is characterized in that, it adopts the method production Lead-acid Storage Battery copper-clad grid of casting, and its concrete production method is:

(1) by with reeded mould A with close up fixing with the mould C of fin;

(2) fixing mold heated to 120 ℃～140 ℃ will be closed up;

(3) plumbous liquation is cast in mould A and mould C, casts for the first time, utilize the formation of the gap between fin in mould A further groove and mould C to be with reeded lead layer;

(4) after plumbous liquation and mold cools down, open mould, mould C is taken off from mould A, be retained in reeded lead layer in the groove of mould A, remove the casting gate part of lead layer;

(5) in the groove of lead layer, pack the copper wire as copper coin grid into;

(6) by being with reeded mould B to be heated to 120 ℃～140 ℃, then, mould A and mould B are closed up fixing;

(7) plumbous liquation is cast in mould A and mould B, casts for the second time, plumbous liquation is full of to the gap between mould B further groove and copper wire, copper wire is wrapped up completely, form the sheath copper coin grid that surface is covered by lead completely;

(8) after plumbous liquation and mold cools down, open mould, take out and cast plumbous sheath copper coin grid blank, remove air flue burr and the casting gate at sheath copper coin grid blank edge, become sheath copper coin grid finished product.

2. implement the Special-purpose combined die of Lead-acid Storage Battery bag method for producing copper sheet grating as claimed in claim 1 for one kind, it has two moulds of correspondence mutually, be mould A and mould B, on the surface of mould A and mould B inner side, there is shape identical, cross sectional dimensions is greater than the groove of copper coin grid copper wire, this groove is some transverse concave grooves and some longitudinal flutings, it is characterized in that, mould A also has the mould C who uses that matches, on the surface of mould C inner side, there is the fin matching with mould A upper groove, the cross sectional dimensions of this fin is less than the cross sectional dimensions of mould A upper groove, the cross-sectional diameter of this fin is identical with the diameter of copper coin grid copper wire.

3. Special-purpose combined die according to claim 2, is characterized in that, the fin on described mould C inner surface is a horizontal fin and some longitudinal fins, and laterally fin is positioned at the upper end of longitudinal fin.