US3833427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planar battery, process of manufacture thereof and film cassette including the same
Assignee: Polaroid Corp
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Filing: 1973-07-27
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Granted: 1974-09-03
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Expires: 1993-07-27
Abstract
Abstract A relatively thin, flat or planar battery which includes one or more cells in series relationship which comprise a planar anode in superposed relationship with a planar cathode and a separator disposed intermediate and extending substantially coextensive the facing surfaces of the anode and cathode and possessing marginal portions and an aqueous electrolyte permeable central portion. Each cell includes an aqueous electrolyte disposed in the central portion of the separator and in contact with the facing surfaces of both the anode and the cathode and each battery possesses an electrically nonconducting, vapor-impervious hydrophobic sealant extending coextensive the marginal surfaces of the battery and intermediate the marginal portions of the separator and next adjacent facing surfaces. The energy generating components of the battery are disposed in and secured by the sealant to a container retaining both the energy-providing components of the battery cell or cells and the sealant selected.
Inventors
- 👤 E Land
- 👤 R Delahunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:27
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/42; H01M6/46
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
15 words
A planar battery as defined in claim 1 wherein the sealant is a thermoplastic wax.
Claim 2
Dependent Claim
8 words
a planar cathode superposed substantially coextensive the anode;
Claim 3
Dependent Claim
30 words
a planar separator positioned intermediate and extending substantially coextensive the facing surfaces of the anode and the cathode and including marginal portions and an aqueous electrolyte permeable central portion; and
Claim 4
Dependent Claim
26 words
A planar battery as defined in claim 2 wherein the thermoplastic wax melts at a temperature within the range of about 140* F. to 200* F.
Claim 5
Dependent Claim
66 words
A planar battery as defined in claim 1 wherein the planar separator includes an electrolyte permeable central portion surrounded by sealant permeable marginal portions, and the electrolyte is disposed in the central portion of the separator, the sealant is disposed in the marginal portions of the separator and both the electrolyte and sealant are in contact with contiguous facing surfaces of the anode and the cathode.
Claim 6
Dependent Claim
114 words
an aqueous electrolyte disposed in the central portion of the separator and in contact with the facing surface of the anode and the cathode; b. contacting at least one wall of the container and the marginal portions of the stack with an electrically nonconducting, vapor-impervious, hydrophobic and thermoplastic sealant in fluid condition for a time sufficient to imbibe the sealant intermediate the marginal portions of the separator and the facing surface next adjacent thereto; and c. solidifying the sealant substantially coextensive the marginal surfaces of the stack and intermediate the marginal portions of the separator and the facing surface next adjacent, and thereby securing the stack to at least one wall of the container.
Claim 7
Dependent Claim
13 words
A planar battery as defined in claim 4 wherein the anode comprises zinc.
Claim 8
Dependent Claim
25 words
A planar battery as defined in claim 5 wherein the zinc is secured to the surface of a conductive polymeric sheet positioned facing the separator.
Claim 9
Dependent Claim
27 words
A planar battery as defined in claim 6 wherein a conductive metallic sheet is secured to the surface of the exterior conductive polymeric sheet opposite the zinc.
Claim 10
Dependent Claim
15 words
A planar battery as defined in claim 7 wherein the conductIve metallic sheet comprises lead.
Claim 11
Dependent Claim
13 words
A planar battery as defined in claim 5 wherein the cathode comprises carbon.
Claim 12
Dependent Claim
14 words
A planar battery as defined in claim 9 wherein the cathode includes maganese dioxide.
Claim 13
Dependent Claim
24 words
A planar battery as defined in claim 10 wherein the carbon and maganese dioxide are disposed in an electrically conductive ionically permeable polymeric matrix.
Claim 14
Dependent Claim
29 words
A planar battery as defined in claim 11 wherein the carbon/maganese dioxide mixture is secured to the surface of a conductive carbon retaining polymeric sheet positioned facing the separator.
Claim 15
Dependent Claim
29 words
A planar battery as defined in claim 12 wherein a conductive metallic sheet is secured to the surface of the exterior conductive carbon retaining sheet opposite the carbon/maganese mixture.
Claim 16
Dependent Claim
17 words
A planar battery as defined in claim 9 wherein the electrolyte comprises zinc chloride and/or ammonium chloride.
Claim 17
Dependent Claim
19 words
A planar battery as defined in claim 14 wherein the electrolyte is disposed in an ionically permeable polymeric matrix.
Claim 18
Dependent Claim
16 words
A planar battery as defined in claim 15 wherein the separator comprises electrolyte permeable fibrous sheet.
Claim 19
Dependent Claim
45 words
A planar battery as defined in claim 1 wherein the marginal portions of the separator comprise electrolyte permeable separator sheet impregnated with an electrolyte impermeable, sealant compatible thermoplastic polymer in a concentration effective to prevent electrolyte permeation of the marginal portions of the separator sheet.
Claim 20
Dependent Claim
18 words
A planar battery as defined in claim 17 wherein the thermoplastic polymer is a polymeric hot melt adhesive.
Claim 21
Dependent Claim
19 words
A planar battery as defined in claim 18 wherein the polymeric hot melt adhesive is a thermoplastic vinyl adhesive.
Claim 22
Dependent Claim
59 words
A planar battery as defined in claim 18 wherein one surface of the thermoplastic polymer impregnated marginal portions of the separator is secured by the sealant to the superposed facing surface of the anode and the other surface of the impregnated marginal portions of the separator is secured by the sealant to the superposed facing surface of the cathode.
Claim 23
Dependent Claim
148 words
A planar battery comprising a plurality of cells as defined in claim 1 in stacked and series relationship, each cell comprising, in combination: a. a planar anode; b. a planar cathode superposed substantially coextensive the anode; c. a planar separator including marginal portions and an aqueous electrolyte permeable central portion positioned intermediate and extending substantially coextensive the facing surfaces of the anode and the cathode; d. aqueous electrolyte disposed in the central portion of the separator and in contact with the facing surfaces of the anode and the cathode; e. an electrolyte impermeable electrically conducting intercell connector positioned intermediate and in coextensive contact with the facing surfaces of each superposed cell; and f. an electrically nonconducting vapor-impermeable wax sealant extending coextensive the marginal surfaces of the multicell battery normal to the stack of cells and intermediate the marginal portions of the separators and each next adjacent facing surface.
Claim 24
Dependent Claim
21 words
A planar battery as defined in claim 21 wherein the intercell connector comprises an electrolyte impermeable electrically conducting polymeric sheet material.
Claim 25
Dependent Claim
48 words
A planar battery as defined in claim 22 wherein the anode of the first of two superposed cells is adhesively secured to one surface of the intercell connector and the cathode of the second of the superposed cells is adhesively secured to the opposite surface of the connector.
Claim 26
Dependent Claim
82 words
A battery assemblage as defined in claim 1 wherein the container is adapted for enclosing a plurality of film units arranged in stacked relationship and including a forward wall having a light-transmitting section to permit exposure of the forwardmost film unit and a withdrawal opening in one wall of the container permitting selective withdrawal of the film units following exposure thereof and the battery is secured by the sealant to at least onE wall of the container rearward of the film units.
Claim 27
Dependent Claim
26 words
A battery assemblage as defined in claim 24 including spring means biasing the film units towards the forward wall and the battery toward the rear wall.
Claim 28
Dependent Claim
31 words
A battery assemblage as defined in claim 24 including at least one opening in a wall of the container to permit conductor contact with each of the anode and the cathode.
Claim 29
Dependent Claim
58 words
A battery assemblage as defined in claim 25 including first and second openings in the rear wall, the first opening to permit conductor contact with the anode or cathode next adjacent the rear wall and the second opening to permit conductor contact with a conductor disposed in the container in contact with the electrode distal the rear wall.
Claim 30
Dependent Claim
24 words
A process for the manufacture of a planar battery which comprises, in combination, the steps of: a. positioning in stacked relationship within a container:
Claim 31
Dependent Claim
20 words
A process for the manufacture of a planar battery as defined in claim 28 wherein the thermoplastic sealant is wax.
Claim 32
Dependent Claim
60 words
A process for the manufacture of a planar battery as defined in claim 29 wherein the thermoplastic wax melts at a temperature within the range of about 140* F. to 200* F. to provide the fluid sealant and the sealant is solidified by reduction of the battery stack to a temperature less than the temperature at which the sealant melts.
Claim 33
Dependent Claim
34 words
A process for the manufacture of a planar battery as defined in claim 28 wherein the marginal portions of the separator comprise a fibrous material and the sealant is imbibed into the marginal portions.
Claim 34
Dependent Claim
46 words
A process for the manufacture of a planar battery as defined in claim 28 wherein the marginal portions of the separator are impregnated with an electrolyte impermeable, sealant compatible thermoplastic polymer in a concentration effective to prevent electrolyte permeation of the marginal portions of the separator.
Claim 35
Dependent Claim
24 words
A process for the manufacture of a planar battery as defined in claim 32 wherein the thermoplastic polymer is a polymeric hot melt adhesive.
Claim 36
Dependent Claim
63 words
A process for the manufacture of a planar battery as defined in claim 33 wherein the hot melt adhesive is fluid at a temperature at which the sealant is fluid and solid at the temperature at which the sealant is solid and including the step of melting the adhesive to the fluid state during contact of the battery stack with the fluid sealant.
Claim 37
Dependent Claim
63 words
A process for the manufacture of a planar battery as defined in claim 28 wherein one surface of the marginal portions of the separator are secured, upon sealant solidification, by the sealant to the superposed facing surface of the anode and the other surfaces of the marginal portions are secured by the sealant upon solidification to the superposed facing surfaces of the cathode.
Claim 38
Dependent Claim
36 words
A process for the manufacture of a planar battery as defined in claim 27 wherein the sealant is introduced into the container in a fluid state subsequent to insertion of the battery stack in the container.
Claim 39
Dependent Claim
30 words
A process for the manufacture of a planar battery as defined in claim 27 wherein the sealant is introduced into the container in a solid state and rendered fluid therein.
Claim 40
Dependent Claim
42 words
A process for the manufacture of a planar battery as defined in claim 27 wherein the marginal portions of the separator include spacer elements displacing marginal portions from continuous contact with the superposed facing surface of the anode and of the cathode.
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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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |