US3516275A - Method of manufacturing battery plate grids - Google Patents

Method of manufacturing battery plate grids Download PDF

Info

Publication number
US3516275A
US3516275A US702670A US3516275DA US3516275A US 3516275 A US3516275 A US 3516275A US 702670 A US702670 A US 702670A US 3516275D A US3516275D A US 3516275DA US 3516275 A US3516275 A US 3516275A
Authority
US
United States
Prior art keywords
ribs
grid
strip
battery plate
frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US702670A
Inventor
Donald H Morrell
Alan Williams
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lucas Industries Ltd filed Critical Lucas Industries Ltd
Application granted granted Critical
Publication of US3516275A publication Critical patent/US3516275A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/10—Battery-grid making

Definitions

  • a method of manufacturing battery plate grids comprises starting with a strip of material from which the grid is to be formed, the strip having thickened side portions and a plurality of longitudinal ribs parallel with the side portions. The strip is passed between rollers which contain an impression of the required grid, and material is caused to flow by the rollers from the thickened side portions and the ribs to enhance the formation of the peripheral frame of the grid.
  • This invention relates to a method of manufacturing battery plate grids.
  • a method according to the invention comprises starting with a strip of material from which the grid is to be formed, the strip having thickened side portions and a plurality of longitudinal ribs parallel with the side portions, and passing the strip between rollers which contain an impression of the required grid, material being caused to flow by the rolling operation from the thickened side portions and the longitudinal ribs of the strip to enhance the formation of the peripheral frame of the grid.
  • the fiow of material is further improved if the ribs are diagonal, but the thickened side portions and longitudinal ribs are also of considerable assistance in manufacturing grids with longitudinal and transverse ribs.
  • FIG. 1 is a diagrammatic plan view of a battery plate grid
  • FIG. 2 is a sectional view of a strip of material from which the grid shown in FIG. 1 is manufacutred.
  • the grid 11 to be manufactured comprises a rectangular frame 12 having its upper and lower sides interconnected by four parallel ribs 13 of diamond shaped cross section, the ribs 13 being of thickness equal to the thickness of the sides of the frame 12.
  • the sides of the frame 12 and the ribs 13 are ice interconnected by two sets of ribs 14, 15 which are oppositely inclined to the ribs 13.
  • the ribs 14, 15 are triangular in section the apices of the ribs 14 being co-planar with the front face of the frame 12 while the apices of the ribs 15 are co-planar with the rear face of the frame 12.
  • the bases of the ribs 14, 15 all lie in a plane mid-way between the front and rear faces of the frame.
  • the upper side of the frame 12 has integral therewith a connecting lug 12a.
  • a strip 16 of dispersion strengthened lead having thickened edge portions 17, 18 and four ribs 19 parallel with the portions 17, 18 is passed between a pair of rollers.
  • the rollers both have depressions therein corresponding to the sides of the frame 12 and the ribs 13 of the grid and one of the rollers also has helically extending depressions therein corresponding with the ribs 14 while the other roller has helically extending depressions therein corresponding to the ribs 15.
  • the portions 17, 18 and the ribs 19 of the strip 16 engage the recesses in the rollers corresponding with the vertical sides of frame 12 and the ribs 13 of the grid respectively and the rolling operation causes lead to flow from the areas of the sheet between the portions 17, 18 and the ribs 19 and from the ribs 19 and the portions 17, 18 themselves into the recesses in the rollers corresponding with the ribs 14, 15 and the upper and lower sides of the frame, of the grid.
  • the inclination of the recesses corresponding with the ribs 14, 15 aids the lateral flow of lead into recesses in the rollers constituting the upper and lower sides of frame 12 and the lug 12a.
  • the rolling operation should leave the areas between the ribs of the grid open, but in practice this desideratum is almost impossible to achieve and thin fillets of lead are left between the ribs. These fillets of lead are removed by a subsequent stamping operation.
  • This invention is not limited to lead grids and could, for example, be used to manufacture plastic grids from sheeting.
  • a suitable material for this purpose would be polypropylene with about 40% talc by weight.
  • a method of manufacturing battery plate grids comprising starting with a strip of material from which the grid is to be formed, the strip having thickened side portions and a plurality of longitudinal ribs parallel with the side portions, and passing the strip between rollers which contain an impression of the required grid, material being caused to flow laterally by the rolling operation from the thickened side portions and the longitudinal ribs of the strip to enhance the formation of the peripheral frame of the grid.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Description

June 23, 1970 3,516,275
METHOD OF MANUFACTURING BATTERY PLATE GRIDS D. H. MORRELL ET AL v Filfid. Feb 2., 1968 Q a. Jtml/ Tim- BW.M
ATTORNEYS United States Patent 3,516,275 METHOD OF MANUFACTURING BATTERY PLATE GRIDS Donald H. Morrell, Sutton Coldfield, and Alan Williams,
Solihull, England, assignors to Joseph Lucas (Industries) Limited, Birmingham, England, a British company Filed Feb. 2, 1968, Ser. No. 702,670 Claims priority, application Great Britain, May 18, 1967, 23,161/ 67 Int. Cl. B21h 8/00 U.S. Cl. 72-198 3 Claims ABSTRACT OF THE DISCLOSURE A method of manufacturing battery plate grids comprises starting with a strip of material from which the grid is to be formed, the strip having thickened side portions and a plurality of longitudinal ribs parallel with the side portions. The strip is passed between rollers which contain an impression of the required grid, and material is caused to flow by the rollers from the thickened side portions and the ribs to enhance the formation of the peripheral frame of the grid.
This invention relates to a method of manufacturing battery plate grids.
It has been proposed to manufacture a battery plate grid having a generally rectangular peripheral frame and a network of longitudinally and transversely extending ribs by rolling a strip of material (for example lead) between rollers which contain an impression of the required grid. However, it is difficult to perform this process satisfactorily because the grid material does not flow sufficiently to fill in the peripheral frame. It has also been proposed, with a view to overcoming this problem, to manufacture grids having diagonally extending ribs. In manufacturing such grids, the depressions in the roller corresponding to the diagonal ribs aid the flow of material during rolling so that more satisfactory filling of the frame results. However, even this improvement is found to be unsatisfactory for large scale production and the present invention seeks to provide an improved method of manufacturing a grid.
A method according to the invention comprises starting with a strip of material from which the grid is to be formed, the strip having thickened side portions and a plurality of longitudinal ribs parallel with the side portions, and passing the strip between rollers which contain an impression of the required grid, material being caused to flow by the rolling operation from the thickened side portions and the longitudinal ribs of the strip to enhance the formation of the peripheral frame of the grid.
The fiow of material is further improved if the ribs are diagonal, but the thickened side portions and longitudinal ribs are also of considerable assistance in manufacturing grids with longitudinal and transverse ribs.
One example of the invention is illustrated in the accompanying drawings wherein:
FIG. 1 is a diagrammatic plan view of a battery plate grid and,
FIG. 2 is a sectional view of a strip of material from which the grid shown in FIG. 1 is manufacutred.
Referring first to FIG. 1 the grid 11 to be manufactured comprises a rectangular frame 12 having its upper and lower sides interconnected by four parallel ribs 13 of diamond shaped cross section, the ribs 13 being of thickness equal to the thickness of the sides of the frame 12. The sides of the frame 12 and the ribs 13 are ice interconnected by two sets of ribs 14, 15 which are oppositely inclined to the ribs 13. The ribs 14, 15 are triangular in section the apices of the ribs 14 being co-planar with the front face of the frame 12 while the apices of the ribs 15 are co-planar with the rear face of the frame 12. The bases of the ribs 14, 15 all lie in a plane mid-way between the front and rear faces of the frame. The upper side of the frame 12 has integral therewith a connecting lug 12a.
In order to manufacture the grid 11 a strip 16 of dispersion strengthened lead having thickened edge portions 17, 18 and four ribs 19 parallel with the portions 17, 18 is passed between a pair of rollers. The rollers both have depressions therein corresponding to the sides of the frame 12 and the ribs 13 of the grid and one of the rollers also has helically extending depressions therein corresponding with the ribs 14 while the other roller has helically extending depressions therein corresponding to the ribs 15.
During the rolling operation the portions 17, 18 and the ribs 19 of the strip 16 engage the recesses in the rollers corresponding with the vertical sides of frame 12 and the ribs 13 of the grid respectively and the rolling operation causes lead to flow from the areas of the sheet between the portions 17, 18 and the ribs 19 and from the ribs 19 and the portions 17, 18 themselves into the recesses in the rollers corresponding with the ribs 14, 15 and the upper and lower sides of the frame, of the grid. The inclination of the recesses corresponding with the ribs 14, 15 aids the lateral flow of lead into recesses in the rollers constituting the upper and lower sides of frame 12 and the lug 12a.
Ideally the rolling operation should leave the areas between the ribs of the grid open, but in practice this desideratum is almost impossible to achieve and thin fillets of lead are left between the ribs. These fillets of lead are removed by a subsequent stamping operation.
This invention is not limited to lead grids and could, for example, be used to manufacture plastic grids from sheeting. A suitable material for this purpose would be polypropylene with about 40% talc by weight.
Having thus described my invention what I claim as new and desire to secure by Letters Patent is:
1. A method of manufacturing battery plate grids, comprising starting with a strip of material from which the grid is to be formed, the strip having thickened side portions and a plurality of longitudinal ribs parallel with the side portions, and passing the strip between rollers which contain an impression of the required grid, material being caused to flow laterally by the rolling operation from the thickened side portions and the longitudinal ribs of the strip to enhance the formation of the peripheral frame of the grid.
2. A method as claimed in claim 1 in which the grid has ribs which extend diagonally.
3. A method as claimed in claim 1 in which the grid has ribs which extend longitudinally and transversely.
References Cited UNITED STATES PATENTS 5/1909 Williams 72187 7/1925 Holland et a1. 292
LOWELL A. LARSON, Primary Examiner
US702670A 1967-02-17 1968-02-02 Method of manufacturing battery plate grids Expired - Lifetime US3516275A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB769967 1967-02-17
GB23161/67A GB1205937A (en) 1967-02-17 1967-02-17 Method of manufacturing battery plate grids

Publications (1)

Publication Number Publication Date
US3516275A true US3516275A (en) 1970-06-23

Family

ID=26241604

Family Applications (1)

Application Number Title Priority Date Filing Date
US702670A Expired - Lifetime US3516275A (en) 1967-02-17 1968-02-02 Method of manufacturing battery plate grids

Country Status (5)

Country Link
US (1) US3516275A (en)
JP (1) JPS4631698B1 (en)
FR (1) FR1554386A (en)
GB (1) GB1205937A (en)
SE (1) SE334961B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT952792B (en) * 1971-04-29 1973-07-30 Lucas Industries Ltd METHOD OF MANUFACTURING GRIDS FOR BATTERY PLATES

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US921043A (en) * 1908-05-22 1909-05-11 William J Williams Process of rolling tie-plate bars.
US1547038A (en) * 1918-10-29 1925-07-21 Philadelphia Storage Battery Method of making storage-battery grids

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US921043A (en) * 1908-05-22 1909-05-11 William J Williams Process of rolling tie-plate bars.
US1547038A (en) * 1918-10-29 1925-07-21 Philadelphia Storage Battery Method of making storage-battery grids

Also Published As

Publication number Publication date
DE1671838B2 (en) 1972-08-17
FR1554386A (en) 1969-01-17
DE1671838A1 (en) 1971-10-14
JPS4631698B1 (en) 1971-09-14
SE334961B (en) 1971-05-10
GB1205937A (en) 1970-09-23

Similar Documents

Publication Publication Date Title
US3945097A (en) Apparatus for making expanded metal lead-acid battery grids
EP0358069B1 (en) Separator for starter batteries
US3700205A (en) Die for molding plastic pallets
US3607411A (en) Prestretched expanded metal and method of making it
US5789103A (en) Battery separator and method of making
US3520418A (en) Filter elements and the manufacture thereof
US3890160A (en) Method and apparatus for preventing curling of lead strips during expansion
DE2347218A1 (en) ELECTRIC MULTICELL BATTERY
US3516275A (en) Method of manufacturing battery plate grids
US1982485A (en) Storage battery grid
GB1442936A (en) Method and apparatus for making expanded metal lead-acid storage battery grids
US3891459A (en) Negative lead-acid battery plates with expanded lead sheet grids
DE334677C (en) Separator for collector batteries
US3881952A (en) Lead-acid battery plates with expanded lead sheet grids
US4299259A (en) Lead storage battery plates and method of making the same
US2514151A (en) Battery separator
DE3207281C2 (en)
DE3204618A1 (en) FUEL CELL BLOCK CONSISTING OF A STACK OF HOLLOW, ELECTRODE-CARRYING ELEMENTS
DE1671838C (en) Process for the production of plate grids for accumulators
DE2932335A1 (en) Composite lead accumulator grid plate - with plastic strips extruded to centre and edges of conductor grid
DE2403222A1 (en) Plates for light-weight accumulators - wound from plus and minus metal foils with two separator strips
IE34336L (en) Manufacture of synthetic fibres
CN209786077U (en) Negative plate grid for improved lead-acid battery and improved roller for rolling mill
US1327336A (en) Manufacture of electric accumulators
CH662213A5 (en) PLATE ELECTRODE WITH METALLIC COVER FOR ELECTROCHEMICAL ELEMENTS AND METHOD FOR PRODUCING THE SAME.