USRE33133E - Negative electrode for lead accumulators - Google Patents

Negative electrode for lead accumulators Download PDF

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Publication number
USRE33133E
USRE33133E US07/123,592 US12359287A USRE33133E US RE33133 E USRE33133 E US RE33133E US 12359287 A US12359287 A US 12359287A US RE33133 E USRE33133 E US RE33133E
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lead
electrode
accordance
grid plate
iaddend
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Reiner Kiessling
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Hagen Batterie AG
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Hagen Batterie AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/72—Grids
    • H01M4/74—Meshes or woven material; Expanded metal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/72—Grids
    • H01M4/74—Meshes or woven material; Expanded metal
    • H01M4/745—Expanded metal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/82—Multi-step processes for manufacturing carriers for lead-acid accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention relates to a negative electrode for lead accumulators in the form of a rectangular, expanded metal, grid plate of copper which serves as a carrier for the active mass and for current supply and extraction, wherein the direction of stretching of the expanded metal extends parallel to the side of the rectangular grid plate at which the connection lug is provided, and wherein a lead strip, which is in one piece with the .[.ocnnection.]. .Iadd.connection .Iaddend.lug, is conductively secured to the relevant edge of the grid plate over the whole length thereof.
  • the problem underlying the present invention is thus to provide a negative electrode of the initially named kind in which a problemfree connection, i.e. a secure connection of high conductivity, is present between the lead strip carrying the connection lug and the grid plate.
  • the invention provides for the lead strip be cast onto the grid plate. In this manner an intimate bond is achieved between the expanded metal grid plate of copper, which is of good conductivity, and the lead strip. Through the casting on of the lead strip an intimate bond also results between the lead which surrounds the expanded metal grid plate of copper and the lead of the lead strip, so that a practically non-releasable mechanical bond is established.
  • the lower edge of the lead strip extends substantially through the outermost crossing points of the grid plate.
  • a particularly good anchoring of the expanded metal grid plate of copper in the lead strip is obtained when the grid plate is cut off at the securing side just beyond the crossing points in such a way that short anchoring webs, which project beyond the crossing points, are present for the casting of the lead of the strip around the relevant edge of the grid plate.
  • a particularly good mechanical bond between the lead strip and the grid plate, which is not sensitive to bending forces in the plane of the grid plate, can be achieved when the fields at the securing side which have their greatest width at the lower edge of the lead strip are also cast full of lead.
  • a further embodiment of the invention is characterised in that the termination strip provided at the edge of the grid plate remote from the lead strip carrying the connection lug consists of acid resistant synthetic material.
  • the synthetic material can be injection-molded around the lower end region of the grid plate. It is however preferred when the end region of the grid plate is pressed in heated condition into the thermoplastic synthetic material. In order to make this pressing-in effortless the grid plates should be cut off at their lower ends at the level of the crossing points, so that V-shaped tips are created which in the heated condition can be pressed into the synthetic material without problem.
  • a further embodiment is characterised in that the end regions of the grid plate, which are either cast around with lead or surrounded by synthetic material, are pressed flat into the plane of the grid plate prior to the casting on of the lead and application of the synthetic material respectively.
  • the termination strip is attached to the expanded metal grid plate prior to the application of the lead-tin layer and/or of the lead layer. Furthermore, it is also preferably arranged that the application of the led-tin alloy and of the final lead layer take place one after the other by the galvanic of route after the termination strip has been attached.
  • the synthetic strip is thus directly connected with the expanded metal copper grid plate.
  • the subsequent galvanic application of the lead-tin alloy and of the lead layer ensures that the copper is completely sealed against the acid bath even in the region at which it enters into the synthetic material.
  • the lead-tin alloy contains at least 8% tin
  • the lead layer is from about 20 ⁇ m to 40 ⁇ m thick;
  • the current density during galvanizing, in particular during the application of the lead layer amounts to from about 6 to 10' A/d 2 ;
  • the stretching ratio of the expanded metal amounts to from about 0.5 to 0.6;
  • the web width of the expanded metal amounts to from about 1.7 to 2.3 mm when the resulting plate is surrounded on both sides by a positive plate;
  • the web thickness of the expanded metal amounts to from about 0.4 to 0.8 mm;
  • the mesh length of the expanded metal amounts from about 15 to 30 mm;
  • the mesh length of the expanded metal is approximately 20 mm.
  • the thickness of the galvanically applied lead-tin alloy is from about 7 ⁇ m to 10 ⁇ m. .Iaddend.
  • FIGURE shows a partly sectioned view of a negative electrode for lead accumulators.
  • the grid plate 11 of copper in the form of a sheet of expanded metal is cut off at the top and the bottom parallel to the direction of stretching S.
  • the expanded metal is cut off at the lower end in the region of the crossing points 15.
  • the grid plate 11 is pressed approximately 5 mm deep into the narrow side of a rectangular termination strip 14 of synthetic material, and indeed in such a way that the synthetic material sealing surrounds the narrow, lower end region of the grid plate 11 on all sides.
  • the grid plate 11 is cut off above the crossing points in such a way that short webs 16 remain above the .[.crosing.]. .Iadd.crossing .Iaddend.points 15 and these crossing points are embedded in the lead strip 13 which carries the connection lug 12.
  • the lower edge 18 of the lead strip 13 extends substantially through the crossing points 15.
  • the manufacture of the negative electrode of the invention proceeds as follows:
  • the expanded metal (copper) is cut in the manner shown in the drawing into rectangular pieces with the cut being effected through the crossing points 15 at the bottom end and somewhat above the crossing points 15 at the top end.
  • the expanded metal is then heated at its lower end region and is plunged into the narrow side of the termination strip of thermoplastic synthetic material. Pressure is then exerted on the broad sides of the strip by means of correspondingly shaped plates in such a way that the lower end of the grid plate 11 which has been thrust into this synthetic material is surrounded on all sides by the synthetic material.
  • the expanded metal is then suspended from a current supply (not shown) by means of schematically illustrated hooks 19.
  • the expanded metal is first hung in a cleaning and rinsing bath in order to provide a suitable surface for the subsequent galvanising.
  • the grid plate After cleaning the grid plate is suspended in a lead-tin bath and a negative voltage is applied whereupon a lead-tin alloy in the ratio of approximately 90:10 is deposited on the surface of the .[.expaned.]. .Iadd.expanded .Iaddend.metal. The current remains switched on until a .[.lead or.]. .Iadd.lead-tin .Iaddend.layer of at least 7 ⁇ m and preferably 10 ⁇ m has been deposited on the expanded metal.
  • the grid plate 11 is subsequently lifted from the bath by means of the hooks 19 and is suspended, without intermediate rinsing, in a further galvanic bath containing lead ions.
  • a negative voltage is once again applied to the grid plate 11 whereupon lead is deposited on the surface.
  • the current supply is continued until the thickness of the lead layer amounts to at least 20 ⁇ m and preferably approximately 40 ⁇ m.
  • the current density amounts to from 6:10 A/dm 2 in order to obtain a coarse crystalline surface which is as rough as possible and which forms a good electrical contact with the negative mass which is later applied.
  • the grid plate 11 carrying the termination strip of synthetic material is now prepared for the casing on of the lead strip 13 at the upper end. This takes place in a correspondingly shaped mold which is however leaky at the points where the webs 16 pass through the mold in such a way that on pouring the lead into the mold not only is the lead strip 13 with the connection lug 12 cast but the fields 17 also are filled with liquid lead. In this way a good current transfer is obtained from the lead strip 13 to the grid plate 11 during handling and also in later operation.
  • the ends of the grid plate 11 Prior to insertion into the strip 14 of synthetic material, and prior to the casting on of lead in the region of the lead strip 13, the ends of the grid plate 11 are pressed flat in their own plane by a suitable tool and indeed in the plane of the grid plate.
  • the negative mass can now be introduced into the grid plate 11 and it should be noted that the stiffness of the mass is somewhat lower than usual so that the mass, one being applied from one plane of the grid plate, reliably reaches the rear side of the grid plate and there ensures clean pasting.
  • a web width of 2 mm negative electrode plates can be manufactured with a thickness of approximately 4.5 mm by overpasting.
  • the mesh length preferably amounts to from 15 to 30 mm. In this way it is ensured that the current in the negative mass has to travel at most a distance of 5 mm, the mean value of the path travelled amounts to approximately 2 mm.
  • the mesh size used in accordance with the invention one obtains a current path which is not too long while avoiding too many stamping steps.
  • the amount of copper used is likewise limited by the mesh size of the invention which is favourable both from the point of view of low weight of the electrode plate and also from the point of view of the manufacturing costs. At the same time a high conductivity is achieved.
  • the thickness of the sheet of copper used for the expanded metal should preferably be approximately 0.6 mm which on the one hand reduces costs and on the other hand enables a lower number of meshes for the same conductivity.
  • a lower number of meshes also has the advantage that the surface of the grid plate does not become too large so that the leading costs are also held within limits.
  • a larger quantity of lead would also increase the weight of the electrode plate.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Photovoltaic Devices (AREA)
  • Hybrid Cells (AREA)
  • Liquid Deposition Of Substances Of Which Semiconductor Devices Are Composed (AREA)
  • Saccharide Compounds (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)

Abstract

A negative electrode for lead accumulators has the form of a rectangular, expanded metal, grid plate 11 of copper. The grid plate serves as carrier for the active mass and for the supply and extraction of current. The direction of stretching of the expanded metal extends parallel to the edge of the rectangular grid plate at which the connection lug is arranged. A lead strip 13, which is in one piece with the connection lug, is conductively secured to the top edge of the grid plate. The lead strip 13 is cast onto the grid plate 12 (FIG. 1).

Description

The invention relates to a negative electrode for lead accumulators in the form of a rectangular, expanded metal, grid plate of copper which serves as a carrier for the active mass and for current supply and extraction, wherein the direction of stretching of the expanded metal extends parallel to the side of the rectangular grid plate at which the connection lug is provided, and wherein a lead strip, which is in one piece with the .[.ocnnection.]. .Iadd.connection .Iaddend.lug, is conductively secured to the relevant edge of the grid plate over the whole length thereof.
With a known negative electrode of this kind (DE-PS No. 2241368) the problem exists of connecting the lead strip which carries the connection lug to the grid plate in problem-free manner. The transition region from the massive lead strip to the expanded metal is, in particular, a problematic area which is not only of importance for achieving a problemfree current transfer but is also an area which may not be subjected to the danger of breakage. It is furthermore disadvantageous that the termination strip provided at the lower end of the grid plate consists of lead which considerably increases the weight of an accumulator equipped with the electrode.
The problem underlying the present invention is thus to provide a negative electrode of the initially named kind in which a problemfree connection, i.e. a secure connection of high conductivity, is present between the lead strip carrying the connection lug and the grid plate.
In order to solve this problem the invention provides for the lead strip be cast onto the grid plate. In this manner an intimate bond is achieved between the expanded metal grid plate of copper, which is of good conductivity, and the lead strip. Through the casting on of the lead strip an intimate bond also results between the lead which surrounds the expanded metal grid plate of copper and the lead of the lead strip, so that a practically non-releasable mechanical bond is established.
It is particularly advantageous if the lower edge of the lead strip extends substantially through the outermost crossing points of the grid plate.
A particularly good anchoring of the expanded metal grid plate of copper in the lead strip is obtained when the grid plate is cut off at the securing side just beyond the crossing points in such a way that short anchoring webs, which project beyond the crossing points, are present for the casting of the lead of the strip around the relevant edge of the grid plate.
This provides the required conductivity and forms the basis for the current transfer from the expanded metal into the strip and vice versa.
A particularly good mechanical bond between the lead strip and the grid plate, which is not sensitive to bending forces in the plane of the grid plate, can be achieved when the fields at the securing side which have their greatest width at the lower edge of the lead strip are also cast full of lead.
In this manner a second lead strip provided with V-shaped notches is effectively provided directly alongside and parallel to the actual lead strip and this ensures problemfree force transfer from the lead strip to the grid plate for all conceivable loads.
In order to significantly reduce the weight of the electrode a further embodiment of the invention is characterised in that the termination strip provided at the edge of the grid plate remote from the lead strip carrying the connection lug consists of acid resistant synthetic material.
The synthetic material can be injection-molded around the lower end region of the grid plate. It is however preferred when the end region of the grid plate is pressed in heated condition into the thermoplastic synthetic material. In order to make this pressing-in effortless the grid plates should be cut off at their lower ends at the level of the crossing points, so that V-shaped tips are created which in the heated condition can be pressed into the synthetic material without problem.
In order to facilitate the casting of lead around the grid plate and the pressing of the grid plate into the synthetic material a further embodiment is characterised in that the end regions of the grid plate, which are either cast around with lead or surrounded by synthetic material, are pressed flat into the plane of the grid plate prior to the casting on of the lead and application of the synthetic material respectively.
As the lead coating of an already leaded expanded metal plate of copper could be damaged during heating for the purpose of pressing the grid plate into the strip of synthetic material it is preferable for the termination strip to be attached to the expanded metal grid plate prior to the application of the lead-tin layer and/or of the lead layer. Furthermore, it is also preferably arranged that the application of the led-tin alloy and of the final lead layer take place one after the other by the galvanic of route after the termination strip has been attached.
The synthetic strip is thus directly connected with the expanded metal copper grid plate. The subsequent galvanic application of the lead-tin alloy and of the lead layer ensures that the copper is completely sealed against the acid bath even in the region at which it enters into the synthetic material.
Preferred ranges of values for the metals that are used.[., such as the current density during galvanising and the dimensions of the expanded metal are set forth in the patent claims 12 to 18..]. .Iadd.are:
(a) the lead-tin alloy contains at least 8% tin;
(b) the lead layer is from about 20 μm to 40 μm thick;
(c) the current density during galvanizing, in particular during the application of the lead layer, amounts to from about 6 to 10' A/d2 ;
(d) the stretching ratio of the expanded metal amounts to from about 0.5 to 0.6;
(e) the web width of the expanded metal amounts to from about 1.7 to 2.3 mm when the resulting plate is surrounded on both sides by a positive plate;
(f) the web thickness of the expanded metal amounts to from about 0.4 to 0.8 mm;
(g) the mesh length of the expanded metal amounts from about 15 to 30 mm;
(h) the mesh length of the expanded metal is approximately 20 mm; and
(i) the thickness of the galvanically applied lead-tin alloy is from about 7 μm to 10 μm. .Iaddend.
The invention will now described in the following by way of example and with reference to the drawing, the single FIGURE of which shows a partly sectioned view of a negative electrode for lead accumulators.
As seen in the drawing the grid plate 11 of copper in the form of a sheet of expanded metal is cut off at the top and the bottom parallel to the direction of stretching S. The expanded metal is cut off at the lower end in the region of the crossing points 15. At this region the grid plate 11 is pressed approximately 5 mm deep into the narrow side of a rectangular termination strip 14 of synthetic material, and indeed in such a way that the synthetic material sealing surrounds the narrow, lower end region of the grid plate 11 on all sides.
At the upper end region the grid plate 11 is cut off above the crossing points in such a way that short webs 16 remain above the .[.crosing.]. .Iadd.crossing .Iaddend.points 15 and these crossing points are embedded in the lead strip 13 which carries the connection lug 12. The lower edge 18 of the lead strip 13 extends substantially through the crossing points 15.
The manufacture of the negative electrode of the invention proceeds as follows:
First of all the expanded metal (copper) is cut in the manner shown in the drawing into rectangular pieces with the cut being effected through the crossing points 15 at the bottom end and somewhat above the crossing points 15 at the top end. The expanded metal is then heated at its lower end region and is plunged into the narrow side of the termination strip of thermoplastic synthetic material. Pressure is then exerted on the broad sides of the strip by means of correspondingly shaped plates in such a way that the lower end of the grid plate 11 which has been thrust into this synthetic material is surrounded on all sides by the synthetic material. The expanded metal is then suspended from a current supply (not shown) by means of schematically illustrated hooks 19. The expanded metal is first hung in a cleaning and rinsing bath in order to provide a suitable surface for the subsequent galvanising.
After cleaning the grid plate is suspended in a lead-tin bath and a negative voltage is applied whereupon a lead-tin alloy in the ratio of approximately 90:10 is deposited on the surface of the .[.expaned.]. .Iadd.expanded .Iaddend.metal. The current remains switched on until a .[.lead or.]. .Iadd.lead-tin .Iaddend.layer of at least 7 μm and preferably 10 μm has been deposited on the expanded metal.
The grid plate 11 is subsequently lifted from the bath by means of the hooks 19 and is suspended, without intermediate rinsing, in a further galvanic bath containing lead ions. A negative voltage is once again applied to the grid plate 11 whereupon lead is deposited on the surface. The current supply is continued until the thickness of the lead layer amounts to at least 20 μm and preferably approximately 40 μm. The current density amounts to from 6:10 A/dm2 in order to obtain a coarse crystalline surface which is as rough as possible and which forms a good electrical contact with the negative mass which is later applied.
The grid plate 11 carrying the termination strip of synthetic material is now prepared for the casing on of the lead strip 13 at the upper end. This takes place in a correspondingly shaped mold which is however leaky at the points where the webs 16 pass through the mold in such a way that on pouring the lead into the mold not only is the lead strip 13 with the connection lug 12 cast but the fields 17 also are filled with liquid lead. In this way a good current transfer is obtained from the lead strip 13 to the grid plate 11 during handling and also in later operation.
By casting lead around the web 16 the lead layer present on the expanded metal bonds intimately with the lead material of the strip 13 so that an ideal bond is obtained both from the point of view of strength and from the point of view of current transfer.
Prior to insertion into the strip 14 of synthetic material, and prior to the casting on of lead in the region of the lead strip 13, the ends of the grid plate 11 are pressed flat in their own plane by a suitable tool and indeed in the plane of the grid plate.
The negative mass can now be introduced into the grid plate 11 and it should be noted that the stiffness of the mass is somewhat lower than usual so that the mass, one being applied from one plane of the grid plate, reliably reaches the rear side of the grid plate and there ensures clean pasting. When using a web width of 2 mm negative electrode plates can be manufactured with a thickness of approximately 4.5 mm by overpasting.
The mesh length preferably amounts to from 15 to 30 mm. In this way it is ensured that the current in the negative mass has to travel at most a distance of 5 mm, the mean value of the path travelled amounts to approximately 2 mm.
As a result of the mesh size used in accordance with the invention one obtains a current path which is not too long while avoiding too many stamping steps. The amount of copper used is likewise limited by the mesh size of the invention which is favourable both from the point of view of low weight of the electrode plate and also from the point of view of the manufacturing costs. At the same time a high conductivity is achieved.
The thickness of the sheet of copper used for the expanded metal should preferably be approximately 0.6 mm which on the one hand reduces costs and on the other hand enables a lower number of meshes for the same conductivity. A lower number of meshes also has the advantage that the surface of the grid plate does not become too large so that the leading costs are also held within limits. A larger quantity of lead would also increase the weight of the electrode plate.

Claims (22)

I claim:
1. In a negative electrode for lead accumulators in the form of a rectangular expanded metal grid plate of copper having upper and lower ends forming upper and lower crossing points of said grid which serves as a carrier for an active mass and for current supply and extraction, the direction of stretching of the expanded metal extending parallel to an end of the rectangular grid plate at which a connection lug is provided, and wherein a lead strip, unitary with .[.a.]. .Iadd.the .Iaddend.connection lug, is conductively secured to .[.one.]. .Iadd.said .Iaddend.end of said grid plate over the whole length thereof, .Iadd.the .Iaddend.improvement wherein .Iadd.said copper grid is covered with a galvanically applied layer of a lead-tin alloy and .Iaddend.the lead strip is cast onto the grid plate .[.and said copper grid is covered by a lead or.]. .Iadd.on top of the previously galvanically applied .Iaddend.lead-tin alloy layer.Iadd., and wherein the end regions of the grid plate which are either cast with lead or surrounded by a synthetic material, are pressed flat in a plane to form the grid plate prior to the casing of the lead and application of the synthetic material respectively.Iaddend..
2. An electrode in accordance with claim 1 wherein the lower portion of the lead strip extends substantially through the outermost upper crossing points of said grid plate.
3. An electrode in accordance with claim 1 wherein the grid plate is cut off at its upper end just beyond the upper crossing points in such a way that short anchoring webs project beyond said upper crossing points for securing the casting of the lead of said strip around the upper portion of said grid plate.
4. An electrode in accordance with claim 1 wherein the openings formed by said grid immediately adjacent said lead strip are also cast full of lead.
5. An electrode in accordance with claim 1 wherein a termination strip is provided at the lower end of the grid plate remote from the lead strip carrying the connection lug, said termination strip comprising an acid resistant synthetic material.
6. An electrode in accordance with claim 5 wherein said synthetic material is injection-molded around the lower end region of the grid plate.
7. An electrode in accordance with claim 5 wherein the lower end region of the grid plate is pressed in heated condition into the thermoplastic synthetic material.
8. An electrode in accordance with claim 5 wherein said grid plate is cut off at its lower end at the level of said crossing points. 9. An electrode in accordance with claim 1 wherein the end regions of the grid plate which are either cast with lead or surrounded by synthetic material, are pressed flat in a plane to form the grid plate prior to the casting of the lead
and application of the synthetic material respectively..]. 10. An electrode in accordance with claim .[.5.]. .Iadd.22 .Iaddend.wherein .[.the.]. .Iadd.an acid resistance synthetic .Iaddend.termination strip is applied to the .Iadd.other end of the .Iaddend.expanded metal grid plate of copper prior to the application of the lead-tin layer and/or of the
lead layer. 11. An electrode in accordance with claim 10 wherein the application of the lead-tin alloy and the final lead layer take place one after the other by galvanic deposition following the attachment of the
termination strip. 12. An electrode in accordance with claim .[.11.].
.Iadd.1 .Iaddend.wherein the lead-tin alloy contains at least 8% tin. 13. An electrode in accordance with claim .[.11.]. .Iadd.22 .Iaddend.wherein the lead layer is from about 20 μm to 40 μm thick.
4. An electrode in accordance with claim .[.11.]. .Iadd.22 .Iaddend.wherein the current density during galvanizing, in particular during the application of the lead layer, amounts to from about 6 to 10
A/dm2. 15. An electrode in accordance with claim 1 wherein the stretching ratio of the expanded metal amounts to from about 0.5 to 0.6.
. An electrode in accordance with claim 1 wherein the web width of the expanded metal amounts to from about 1.7 to 2.3 mm when the resulting
plate is surrounded on both sides by a positive plate. 17. An electrode in accordance with claim 1 wherein the web thickness of the expanded metal
amounts to from about 0.4 to 0.8 mm. 18. An electrode in accordance with claim 1 wherein the mesh length of the expanded metal amounts to from
about 15 to 30 mm. 19. An electrode in accordance with claim 1, wherein
the web width of the expanded metal is approximately 2 mm. 20. An electrode in accordance with claim 1, wherein the web thickness of the
expanded metal is approximately 0.6 mm. 21. An electrode according to claim 1, wherein the mesh length of the expanded metal is approximately 20 mm. .Iadd.22. An electrode in accordance with claim 1 wherein a galvanically applied layer of lead is deposited on the copper grid on top of the previously galvanically applied lead-tin alloy layer. .Iaddend. .Iadd.23. An electrode in accordance with claim 22 wherein the lead-tin
alloy contains at least 8% tin. .Iaddend. .Iadd.24. An electrode in accordance with claim 22, wherein the lead-tin alloy layer is applied to the grid plate after suspending the grid plate in a cleaning and rinsing bath, and the layer of lead is subsequently deposited without intermediate rinsing. .Iaddend. .Iadd.25. An electrode in accordance with claim 12,
wherein the lead-tin alloy layer contains 10% tin. .Iaddend. .Iadd.26. An electrode in accordance with claim 1, wherein the thickness of the galvanically applied lead-tin alloy is from about 7 μm to 10 μm. .Iaddend.
US07/123,592 1983-04-07 1987-11-18 Negative electrode for lead accumulators Expired - Lifetime USRE33133E (en)

Applications Claiming Priority (2)

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DE3312550A DE3312550C3 (en) 1983-04-07 1983-04-07 Negative electrode for lead acid batteries and process for their production
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US5062574A (en) 1989-08-16 1991-11-05 Akkumulator-Es Szarazelemgyar Process for the preparation of active-mass of improved quality from active-mass wastes formed during the production of lead accumulators
US5093970A (en) * 1990-04-30 1992-03-10 Keiji Senoo Lead-acid battery plate and its manufacturing method
US5223354A (en) * 1990-04-30 1993-06-29 Yuasa Battery Co., Ltd. Lead-acid battery plate and its manufacturing method
US6316148B1 (en) 2000-08-31 2001-11-13 Condord Battery Corporation Foil-encapsulated, lightweight, high energy electrodes for lead-acid batteries
US6447954B1 (en) 2000-06-23 2002-09-10 Concorde Battery Corporation High energy, light weight, lead-acid storage battery
US6566010B1 (en) 2000-11-16 2003-05-20 Concorde Battery Corporation High energy, lightweight, lead-acid storage battery
US6586136B1 (en) 2000-11-16 2003-07-01 Concorde Battery Corporation Lightweight, low resistance electrode plate for lead-acid batteries
US20100009262A1 (en) * 2008-07-11 2010-01-14 Eliot Gerber Non-lead grid cores for lead acid battery and method of their production
US20100009263A1 (en) * 2008-07-11 2010-01-14 Eliot Gerber Lead acid battery having ultra-thin
US20110033744A1 (en) * 2008-07-11 2011-02-10 Gerber Eliot S Long life lead acid battery having titanium core grids and method of their production
US8232005B2 (en) 2008-11-17 2012-07-31 Eliot Gerber Lead acid battery with titanium core grids and carbon based grids

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IT1210794B (en) * 1987-06-12 1989-09-20 Magneti Marelli Spa PROCEDURE FOR MAKING GROUPS OF PLATES OR NEGATIVE ELECTRODIC GRILLS FOR LEAD ACCUMULATORS AND GROUPS OF PLATES OR GRIDS REALIZED WITH THE PROCEDURE
DE3733734A1 (en) * 1987-10-06 1989-04-20 Varta Batterie ELECTRIC ACCUMULATOR
JPH0192742U (en) * 1987-12-14 1989-06-19
DE3822393C1 (en) * 1988-07-01 1990-02-08 Accumulatorenfabrik Sonnenschein Gmbh, 6470 Buedingen, De
JPH0237431U (en) * 1988-08-31 1990-03-12
DE3922424C2 (en) * 1989-07-07 1994-02-03 Hagen Batterie Ag Electrode for electrochemical cells and method for producing a grid plate for an electrode
US5126217A (en) * 1991-03-26 1992-06-30 Gnb Incorporated Frame for modular, multicell lead-acid batteries and such modular batteries
DE102004055283A1 (en) * 2004-11-16 2006-05-24 Akkumulatorenfabrik Moll Gmbh & Co. Kg Grid for an electrode of a lead-acid battery
DE102007014255A1 (en) * 2007-01-31 2008-08-07 Abertax Research And Development Ltd. Electrical lead-acid battery cell, has anode with earth made of lead dioxide and core made of partially highly conductive non-lead-material, where core is covered with layer made of lead or lead alloy
KR20090125253A (en) * 2007-03-02 2009-12-04 존슨 컨트롤스 테크놀러지 컴퍼니 Negative grid for battery
CN104043808B (en) * 2014-06-20 2016-04-13 北京科技大学 One adds copper mesh compound high silicon iron-base alloy battery lead plate and manufacture method thereof

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US3738871A (en) * 1971-05-06 1973-06-12 Scholle Corp Storage battery plates of plastic and lead
US3891459A (en) * 1973-09-20 1975-06-24 Gen Motors Corp Negative lead-acid battery plates with expanded lead sheet grids
US4237205A (en) * 1979-10-22 1980-12-02 General Motors Corporation Pocket grid for alkaline battery plates
JPS5743363A (en) * 1980-08-28 1982-03-11 Yuasa Battery Co Ltd Manufacture of lattice for storage battery
US4386987A (en) * 1981-06-26 1983-06-07 Diamond Shamrock Corporation Electrolytic cell membrane/SPE formation by solution coating

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US1982485A (en) * 1930-04-09 1934-11-27 Expanded Metal Company Storage battery grid
GB689003A (en) * 1951-03-05 1953-03-18 Chloride Electrical Storage Co Improvements in primary and secondary electric batteries
US3180761A (en) * 1959-01-24 1965-04-27 Varta Ag Electrochemical cell electrode containing an expanded metal grid
US3275473A (en) * 1964-01-03 1966-09-27 Eagle Picher Co Battery grid
US3607411A (en) * 1968-03-21 1971-09-21 Exmet Corp Prestretched expanded metal and method of making it
US3738871A (en) * 1971-05-06 1973-06-12 Scholle Corp Storage battery plates of plastic and lead
US3891459A (en) * 1973-09-20 1975-06-24 Gen Motors Corp Negative lead-acid battery plates with expanded lead sheet grids
US4237205A (en) * 1979-10-22 1980-12-02 General Motors Corporation Pocket grid for alkaline battery plates
JPS5743363A (en) * 1980-08-28 1982-03-11 Yuasa Battery Co Ltd Manufacture of lattice for storage battery
US4386987A (en) * 1981-06-26 1983-06-07 Diamond Shamrock Corporation Electrolytic cell membrane/SPE formation by solution coating

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5062574A (en) 1989-08-16 1991-11-05 Akkumulator-Es Szarazelemgyar Process for the preparation of active-mass of improved quality from active-mass wastes formed during the production of lead accumulators
US5093970A (en) * 1990-04-30 1992-03-10 Keiji Senoo Lead-acid battery plate and its manufacturing method
US5223354A (en) * 1990-04-30 1993-06-29 Yuasa Battery Co., Ltd. Lead-acid battery plate and its manufacturing method
US6447954B1 (en) 2000-06-23 2002-09-10 Concorde Battery Corporation High energy, light weight, lead-acid storage battery
US6316148B1 (en) 2000-08-31 2001-11-13 Condord Battery Corporation Foil-encapsulated, lightweight, high energy electrodes for lead-acid batteries
US6586136B1 (en) 2000-11-16 2003-07-01 Concorde Battery Corporation Lightweight, low resistance electrode plate for lead-acid batteries
US6566010B1 (en) 2000-11-16 2003-05-20 Concorde Battery Corporation High energy, lightweight, lead-acid storage battery
US20100009262A1 (en) * 2008-07-11 2010-01-14 Eliot Gerber Non-lead grid cores for lead acid battery and method of their production
US20100009263A1 (en) * 2008-07-11 2010-01-14 Eliot Gerber Lead acid battery having ultra-thin
US7732098B2 (en) 2008-07-11 2010-06-08 Eliot Gerber Lead acid battery having ultra-thin titanium grids
US20110033744A1 (en) * 2008-07-11 2011-02-10 Gerber Eliot S Long life lead acid battery having titanium core grids and method of their production
US8048572B2 (en) 2008-07-11 2011-11-01 Eliot Samuel Gerber Long life lead acid battery having titanium core grids and method of their production
US8232005B2 (en) 2008-11-17 2012-07-31 Eliot Gerber Lead acid battery with titanium core grids and carbon based grids

Also Published As

Publication number Publication date
ATE45445T1 (en) 1989-08-15
IN161811B (en) 1988-02-06
AU2641184A (en) 1984-10-11
DE3312550A1 (en) 1984-10-11
GR81832B (en) 1984-12-12
KR840008543A (en) 1984-12-15
US4554228A (en) 1985-11-19
NO159223C (en) 1991-04-16
ZA842564B (en) 1984-12-24
EP0124745B1 (en) 1989-08-09
EP0124745A1 (en) 1984-11-14
JPS6153829B2 (en) 1986-11-19
KR890002309B1 (en) 1989-06-28
IL71445A (en) 1987-10-30
JPS59186264A (en) 1984-10-23
DK177184A (en) 1984-10-08
DE3479369D1 (en) 1989-09-14
DE3312550C3 (en) 1995-04-20
DK177184D0 (en) 1984-04-03
CA1212718A (en) 1986-10-14
SU1393323A3 (en) 1988-04-30
NO841366L (en) 1984-10-08
AU563634B2 (en) 1987-07-16
IL71445A0 (en) 1984-07-31
NO159223B (en) 1988-08-29
DK166556B1 (en) 1993-06-07
DE3312550C2 (en) 1989-10-12

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