US2887523A - Grid for accumulator plates - Google Patents

Grid for accumulator plates Download PDF

Info

Publication number
US2887523A
US2887523A US678427A US67842757A US2887523A US 2887523 A US2887523 A US 2887523A US 678427 A US678427 A US 678427A US 67842757 A US67842757 A US 67842757A US 2887523 A US2887523 A US 2887523A
Authority
US
United States
Prior art keywords
mercury
lead
alloy
grid
grids
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
US678427A
Inventor
Clostermann Marianne
Borchers Heinz
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.)
Accumulatoren Fabrik AG
Original Assignee
Accumulatoren Fabrik AG
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 Accumulatoren Fabrik AG filed Critical Accumulatoren Fabrik AG
Priority to US678427A priority Critical patent/US2887523A/en
Application granted granted Critical
Publication of US2887523A publication Critical patent/US2887523A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H01M4/66—Selection of materials
    • H01M4/68—Selection of materials for use in lead-acid accumulators
    • H01M4/685—Lead alloys
    • 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 present invention relates to a lead accumulator and more particularly to an improved grid for accumulator plates, said grid being composed of a lead-mercury alloy.
  • the present invention consists in providing accumulator grids composed of a lead-mercury alloy having a mercury content between about 6% and about 8%.
  • the Brinell hardness of a lead-mercury alloy with a mercury content of 6% is 8.3 kg./sq. mm., i.e. about 25% higher than that of the known lead-mercury alloy with 3% mercury. Up to a mercury content of 8% only a slight increase of the Brinell hardness to 8.5 kg./sq. mm. is observed.
  • a further increase of the mercury content is highly 2,887,523 Patented May 19, 1959 uneconomical since it does not impart to the alloy a proportionate increase in hardness. Furthermore, an alloy with a mercury content above about 8% exhibits increasing brittleness. A material of such a high mercury content can no longer be processed satisfactorily to accumulator grids.
  • the negative plates may also be made of the same lead-mercury alloy as the positive plates.
  • Example 1 An alloy is prepared by melting lead and admixing thereto 6% of mercury. The resulting lead-mercury alloy of a Brinell hardness of 8.3 kg./sq. mm. is cast to a grid plate of a thickness of 1.8 mm. The active paste is then pasted in a manner known to the art into the grid, the pasted plates are dried and formed.
  • Example 2 An alloy is prepared by melting lead and admixing thereto 8% of mercury. The resulting lead-mercury alloy of a Brinell hardness of 8.5 kg./sq. mm. is cast to a grid plate of a thickness of 2.3 mm. and is then pasted and formed as described in Example 1.
  • a pasted electrode plate for storage batteries comprising a grid serving as support for the active material and being composed of a lead-mercury alloy containing between about 6% and about 8% of mercury, the remainder being lead, and active material carried by said grid.

Description

GRID FOR ACCUMULATOR PLATES Klaus Clostermann, deceased, late of Hagen, Germany, by Marianne Clostermann, sole heir, Hagen, and Heinz Borchers, Munich, Germany, assignors to Accumulatoren-Fabrik Aktieugesellschaft, Hagen, Germany, a corporation of Germany N Drawing. Application August 15, 1957 Serial No. 678,427
1 Claim. (Cl. 136-65) The present invention relates to a lead accumulator and more particularly to an improved grid for accumulator plates, said grid being composed of a lead-mercury alloy.
In the accumulator industry attempts have been made repeatedly to eliminate the undesirable side-elfects resulting from the use of antimony for hardening the lead composing the grids of accumulators, by using alloy constituents other than antimony. Mercury has been suggested as such alloy constituent. For instance, a leadmercury alloy with an approximate ratio of 97% lead and 3% mercury is known. Allegedly such an alloy permits the production of a satisfactory grid which is said to be of sufficient hardness to expand less than pure lead.
Experiments which have been carried out regarding the hardness and the behavior of such lead-mercury grids in a lead accumulator have shown, however, that the hardness of a grid with a mercury content of 3% does not meet the requirements of the accumulator industry. The resistance to corrosion during the operation of accumulators provided with grids of such a mercury content has also been found to be unsatisfactory. Determination of the hardness of such grids has shown that a Brinell hardness of only 6.5 kg./ sq. mm. is achieved.
It is one object of the present invention to provide grids for accumulator plates, which grids are composed of a lead-mercury alloy that does not have the disadvantages of the known lead-mercury alloys, the hardness of which is suflicient for use in the manufacture of accumulator grids, and the resistance to corrosion of which not only surpasses that of the known lead-mercury grids but also that of the known lead-antimony grids.
Other objects of the present invention and advantageous features thereof will become apparent as the description proceeds.
In principle, the present invention consists in providing accumulator grids composed of a lead-mercury alloy having a mercury content between about 6% and about 8%.
It was found that the Brinell hardness of a lead-mercury alloy with a mercury content of 6% is 8.3 kg./sq. mm., i.e. about 25% higher than that of the known lead-mercury alloy with 3% mercury. Up to a mercury content of 8% only a slight increase of the Brinell hardness to 8.5 kg./sq. mm. is observed.
A further increase of the mercury content is highly 2,887,523 Patented May 19, 1959 uneconomical since it does not impart to the alloy a proportionate increase in hardness. Furthermore, an alloy with a mercury content above about 8% exhibits increasing brittleness. A material of such a high mercury content can no longer be processed satisfactorily to accumulator grids.
Comparative corrosion tests carried out with accumulators having grids made of a lead-mercury alloy with about 3% mercury, of a lead mercury alloy according to the present invention with 6% mercury, and of a leadantimony alloy as it is conventionally used in grid plates for lead accumulators, show that grids with a mercury content of 3% have only 87% of the durability of the usual lead-antimony alloy, whereas the grids produced according to the present invention with a lead-mercury alloy with 6% mercury have a durability which exceeds that of the usual lead-antimony alloy by 53%.
The advantages achieved by the present invention and in particular the considerably increased durability of the grids are achieved only with a mercury content between about 6% and about 8%.
It has been found that ordinarily it is sufiicient to make only the positive plates of lead accumulators of the leadmercury alloy according to the present invention. In special cases in which particular importance is placed on a slight self-discharge, the negative plates may also be made of the same lead-mercury alloy as the positive plates.
The following examples serve to illustrate the present invention without, however, limiting the same thereto.
Example 1 An alloy is prepared by melting lead and admixing thereto 6% of mercury. The resulting lead-mercury alloy of a Brinell hardness of 8.3 kg./sq. mm. is cast to a grid plate of a thickness of 1.8 mm. The active paste is then pasted in a manner known to the art into the grid, the pasted plates are dried and formed.
Example 2 An alloy is prepared by melting lead and admixing thereto 8% of mercury. The resulting lead-mercury alloy of a Brinell hardness of 8.5 kg./sq. mm. is cast to a grid plate of a thickness of 2.3 mm. and is then pasted and formed as described in Example 1.
What is claimed is:
A pasted electrode plate for storage batteries comprising a grid serving as support for the active material and being composed of a lead-mercury alloy containing between about 6% and about 8% of mercury, the remainder being lead, and active material carried by said grid.
References Cited in the file of this patent UNITED STATES PATENTS 645,261 Irving Mar. 13, 1900 FOREIGN PATENTS 483,562 Great Britain Apr. 19, 1938
US678427A 1957-08-15 1957-08-15 Grid for accumulator plates Expired - Lifetime US2887523A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US678427A US2887523A (en) 1957-08-15 1957-08-15 Grid for accumulator plates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US678427A US2887523A (en) 1957-08-15 1957-08-15 Grid for accumulator plates

Publications (1)

Publication Number Publication Date
US2887523A true US2887523A (en) 1959-05-19

Family

ID=24722739

Family Applications (1)

Application Number Title Priority Date Filing Date
US678427A Expired - Lifetime US2887523A (en) 1957-08-15 1957-08-15 Grid for accumulator plates

Country Status (1)

Country Link
US (1) US2887523A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060057462A1 (en) * 2004-09-08 2006-03-16 Jeon Ki Y Lithium ion secondary battery

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US645261A (en) * 1899-05-02 1900-03-13 Andrew G Vogt Battery-electrode.
GB483562A (en) * 1936-10-16 1938-04-19 Alfred Noel Hazlehurst Improvements relating to secondary electric batteries

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US645261A (en) * 1899-05-02 1900-03-13 Andrew G Vogt Battery-electrode.
GB483562A (en) * 1936-10-16 1938-04-19 Alfred Noel Hazlehurst Improvements relating to secondary electric batteries

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060057462A1 (en) * 2004-09-08 2006-03-16 Jeon Ki Y Lithium ion secondary battery

Similar Documents

Publication Publication Date Title
US2832813A (en) Electrode for an alkali storage cell and a process of manufacturing same
US2987567A (en) Dry-charged negative electrode
US2887523A (en) Grid for accumulator plates
US3023262A (en) Battery electrode
US2821565A (en) Battery grid and plate
US2176427A (en) Electric storage battery retainer
KR830004442A (en) Lead alloys containing small amounts of antimony and their use
JP3182856B2 (en) Manufacturing method of electrode plate for lead-acid battery
US3647545A (en) Battery electrode grids made from tin-lithium-lead alloy
US2170650A (en) Alloy
US2999122A (en) Thermal potential producing cell
JPS60198055A (en) Manufacture of plate for lead storage battery
US3236696A (en) Process for producing a composite electrode
US2794707A (en) Lead acid accumulators
US2983777A (en) Rechargeable battery
US2683183A (en) Negative plate paste for storage batteries
US3057049A (en) Alloy and composite stock
US2993785A (en) Lead-antimony alloy for battery plate grids
US4169192A (en) Lead-acid storage battery having Pb-Cd-Zn-Sn plate straps
ES8100553A1 (en) A tubular-type positive plate for a lead acid battery and method of manufacturing.
US2994626A (en) Low loss battery
US3859084A (en) Cadmium-antimony-lead alloy
US3296028A (en) Lead storage battery electrode alloy composition
GB869618A (en) Lead-acid storage cells
JPS63148556A (en) Paste type lead acid battery