Patent US3900341A successfully refreshed from Google Patents.
US3900341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage battery and process for producing the battery
Assignee: Yuasa Corp
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Filing: 1973-06-21
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Granted: 1975-08-19
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Expires: 1993-06-21
Abstract
Abstract This invention relates to storage batteries and more particulary to a lead-acid type storage battery and a process for producing the same. The battery is a lead-acid type storage battery which is made by housing a battery plate with an envelope type separator formed by folding a microporous sheet obtained by depositing a solution consisting of a synthetic resin, a solvent dissolving the synthetic resin and a nonsolvent not dissolving it on a base, drying it and heat-sealing the sheet on the sides. The process for producing it is adapted to the mass-production. Therefore, the present invention has the advantages of obtaining a storage battery favorable in the performance, long in the life and having structure capable of being produced by automation and a process for producing the same.
Inventors
- 👤 Ito Shoichiro
- 👤 Tokuzi Ohya
- 👤 Shozi Nagai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:27
CPC Classifications
B; B32; B32B; B32B37/00; B32B37/14; B32B37/142; H; H01; H01M; H01M10/00; H01M10/06; H01M10/12; H01M50/00; H01M50/40; H01M50/463; H01M50/489; H01M50/491; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1051; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/4911
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
149 words
A LEAD-ACID TYPE STORAGE BATTERY COMPRISING MICRO-PORES AN ENVELOPE TYPE SEPARATOR FORMED BY A FOLDED MICRO-POROUS SHEET MADE OF A SYNTHETIC RESIN HAVING BETWEEN SEVERAL 10,000 TO SEVERAL 100,000,000 MICRO-PORES PER CM2 WITH THE DIAMETER OF SUCH MICRO-PORES BEING IN A RANGE BETWEEN 100 A TO SEVERAL U, AND SAID FOLDED MICRO-POROUS SHEET HAVING PORTIONS OF AT LEAST ONE OF ITS SIDES HEAT-SEALED TOGETHER AND HAVING SLIT IN ITS FOLDED SECTION, AND A BATTERY PLATE HOUSED WIITHIN SAID ENVELOPE TYPE-SEPARATOR, SAID BATTERY PLATE HAVING AT LEAST ONE LEG, SAID SLITS WITHIN SAID MICRO-POROUS SHEET BEING ARRANGED SO AS TO LEAVE A SUFFICIENT PORTION OF THE FOLDED SECTION OF SAID SHEET FOR FORMING A PROTECTIVE COVER FOR SAID LEG OF SAID BATTERY PLATE, AND SAID SLITS BEING ARRANGED TO ENABLE ACTIVE MATERIAL GENERATED DURING BATTERY OPERATION TO DROP FROM SAID BATTERY PLATE WITHOUT ACCUMULATING AT THE BOTTOM OF SAID SEPARATOR.
Claim 2
Dependent Claim
149 words
A LEAD-ACID TYPE STORAGE BATTERY COMPRISING MICRO-PORES AN ENVELOPE TYPE SEPARATOR FORMED BY A FOLDED MICRO-POROUS SHEET MADE OF A SYNTHETIC RESIN HAVING BETWEEN SEVERAL 10,000 TO SEVERAL 100,000,000 MICRO-PORES PER CM2 WITH THE DIAMETER OF SUCH MICRO-PORES BEING IN A RANGE BETWEEN 100 A TO SEVERAL U, AND SAID FOLDED MICRO-POROUS SHEET HAVING PORTIONS OF AT LEAST ONE OF ITS SIDES HEAT-SEALED TOGETHER AND HAVING SLIT IN ITS FOLDED SECTION, AND A BATTERY PLATE HOUSED WIITHIN SAID ENVELOPE TYPE-SEPARATOR, SAID BATTERY PLATE HAVING AT LEAST ONE LEG, SAID SLITS WITHIN SAID MICRO-POROUS SHEET BEING ARRANGED SO AS TO LEAVE A SUFFICIENT PORTION OF THE FOLDED SECTION OF SAID SHEET FOR FORMING A PROTECTIVE COVER FOR SAID LEG OF SAID BATTERY PLATE, AND SAID SLITS BEING ARRANGED TO ENABLE ACTIVE MATERIAL GENERATED DURING BATTERY OPERATION TO DROP FROM SAID BATTERY PLATE WITHOUT ACCUMULATING AT THE BOTTOM OF SAID SEPARATOR.
Claim 3
Dependent Claim
31 words
A lead-acid type storage battery as defined in claim 1, wherein said folded micro-porous sheet is heat-sealed at both upper and lower parts along its two sides adjacent the folded section.
Claim 4
Dependent Claim
33 words
A lead-acid type storage battery as defined in claim 1, wherein said folded micro-porous sheet has a thickness of between 0.1 and 0.2 mm and clearance maintaining means provided on its inner surface.
Claim 5
Dependent Claim
181 words
A process for forming an envelope type separator enclosing a battery plate for use in a lead-acid type storage battery comprising the steps of: gripping a lower edge of a micro-porous sheet extending from a reel of Such sheet; vertically lowering the micro-porous sheet; forming horizontal slits in the micro-porous sheet when in its vertical orientation, the slits being formed except in those locations corresponding to the location of legs of a corresponding battery plate and the slits being formed to enable active material generated during battery operation to drop from the battery plate without accumulating at the bottom of the separator; horizontally moving a battery plate having at least one leg into contact with the vertically orientated sheet at such slitted section; arranging the battery plate legs adjacent to sections of the micro-porous sheet free of any slit; cutting off the micro-porous sheet from the reel and releasing the grip on the lower edge of the sheet; enclosing the battery plate by folding the micro-porous sheet; and, forming an envelope type separator by heat-sealing the sides of the micro-porous sheet.
Claim 6
Dependent Claim
181 words
A process for forming an envelope type separator enclosing a battery plate for use in a lead-acid type storage battery comprising the steps of: gripping a lower edge of a micro-porous sheet extending from a reel of Such sheet; vertically lowering the micro-porous sheet; forming horizontal slits in the micro-porous sheet when in its vertical orientation, the slits being formed except in those locations corresponding to the location of legs of a corresponding battery plate and the slits being formed to enable active material generated during battery operation to drop from the battery plate without accumulating at the bottom of the separator; horizontally moving a battery plate having at least one leg into contact with the vertically orientated sheet at such slitted section; arranging the battery plate legs adjacent to sections of the micro-porous sheet free of any slit; cutting off the micro-porous sheet from the reel and releasing the grip on the lower edge of the sheet; enclosing the battery plate by folding the micro-porous sheet; and, forming an envelope type separator by heat-sealing the sides of the micro-porous sheet.
Claim 7
Dependent Claim
49 words
A process as defined in claim 4, wherein said step of enclosing the battery plate is carried out by moving the battery plate and the micro-porous sheet between upper and lower conveyers and said step of heat-sealing occurs while the battery plate and micro-porous sheet move between the conveyers.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |