Patent US3776779A successfully refreshed from Google Patents.
US3776779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gelled battery electrolyte containing a polyglycol polymer and a process for locating same within a lead-acid cell
Assignee: Elpower Corp
•
Filing: 1972-04-28
•
Granted: 1973-12-04
•
Expires: 1992-04-28
Abstract
Abstract A gelled battery electrolyte of a non-thixotropic character resistant to cracking and shrinking can be formed utilizing aqueous sulfuric acid, silica serving as a gelling agent for this acid and a polyglycol, preferably polyethylene glycol, as an additive-stablizer for the gel. The amounts of the silica and the polyglycol used will depend upon the physical and electrical properties desired in the battery. Preferably the electrolyte is formed by placing the polyglycol in an inlet to a battery so that it will be mixed with sulfuric acid and the silica as a dispersion of the two is directed into the battery so as to fill the battery. The polyglycol may, also, be located on battery parts prior to filling or a solution of the polyglycol can be injected into the electrolyte solution during filling.
Inventors
- 👤 B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:16
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/06; H01M10/08; H01M10/10; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
17 words
An electric battery as claimed in claim 1 wherein: said polyglycol polymer is a polyethylene glycol polymer.
Claim 2
Dependent Claim
47 words
An electric battery as claimed in claim 1 wherein: said gelled electrolyte contains of from about 3 percent to about 8.5 percent by weight colloidal silica serving as a gelling agent and contains from about 0.065 percent to about 0.0001 percent by weight of said polyglycol polymer.
Claim 3
Dependent Claim
23 words
An electric battery as claimed in claim 1 wherein: said battery includes separator means positioning said Electrodes separate and apart from one another,
Claim 4
Dependent Claim
66 words
An electric battery as claimed in claim 4 wherein: said polyglycol polymer is a polyethylene glycol polymer having a molecular weight of from about 800 to about 6,000. said gelled electrolyte contains of from about 3 percent to about 8.5 percent by weight colloidal silica serving as a gelling agent and contains from about 0.065 percent to about 0.0001 percent by weight of said polyglycol polymer.
Claim 5
Dependent Claim
115 words
A process for locating a gelled-aqueous sulfuric acid electrolyte within an enclosed space located within a battery cell which comprises the steps of: forming a mixture of aqueous sulfuric acid and a silica gelling agent, said mixture containing an effective amount of said silica gelling agent to form a solid thixotropic gel with said sulfuric acid, injecting said mixture into said space while applying sufficient mechanical stress to said mixture to overcome the thixotropic character of said mixture while contacting said mixture with a polyglycol polymer in an amount effective to render said gelled electrolyte non-thixotropic in character, and allowing a gel to form from said mixture after it has been contacted by said polyglycol.
Claim 6
Dependent Claim
57 words
A process as claimed in claim 6 wherein: said mixture is injected into said space through an opening; said polyglycol polymer is in the form of a quanity of solid particles located within said space adjacent to said opening, said particles being contacted by and mixed with said mixture as said mixture is passed through said opening.
Claim 7
Dependent Claim
47 words
A process as claimed in claim 6 wherein: there are component parts of a battery within said enclosed space, said polyglycol polymer is located on the surfaces of said parts so as to be contacted with said mixture as said mixture comes in contact with said parts.
Claim 8
Dependent Claim
32 words
A process as claimed in claim 6 wherein: said mixture is contacted with said polyglycol polymer by mixing said polyglycol polymer with said mixture concurrently while injecting said mixture into said space.
Claim 9
Dependent Claim
59 words
A process as claimed in claim 6 wherein: said gelled electrolyte is located within a battery cell having a filling opening and said enclosed space is the interior of said cell, electrodes and spacer means separating said electrodes both capable of being penetrated by sulfuric acid are located within said cell, and said polyglycol polymer is polyethylene glycol polymer.
Claim 10
Dependent Claim
125 words
A process as claimed in claim 10 wherein: said polyglycol polymer is in the form of a solid powder located within said filling opening when said mixture is injected into the interior of said battery, the injection of said mixture into said battery serving to mix said mixture with said polymer, said polymer and said silica are separated from said sulfuric acid as said mixture is injected into said battery by the physical structure of said electrodes and said spacer means so that said battery contains ''''free'''' sulfuric acid within said electrodes and said spacer means and sulfuric acid gelled to a non-thixotropic character in the ''''free'''' space within the interior of said battery which is not occupied by said electrodes and said separator means.
Claim 11
Dependent Claim
134 words
A process as claimed in claim 10 wherein: said polyglycol polymer is located in the form of film upon said electrodes and said spacer means as it is contacted by said mixture as said mixture is injected into said battery, the injection of said mixture into said battery serving to contact said mixture with said polyglycol polymer so that said polyglycol polymer is uniformly present within said electrolyte within the ''''free space'''' within the interior of said battery which is not occupied by said electrodes and said separator means, the physical structure of said electrodes and said spacer means serving to separate sulfuric acid from said silica and said polyglycol polymer as said mixture is injected into said battery sO that said battery contains ''''free'''' sulfuric acid within said electrodes and said spacer means.
References Cited (Backward Citations)
US2762858A
Cited
US2887522A
Cited
US3271199A
Cited
US3419431A
Cited
US3305396A
Cited
US3556860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |