Source: https://patents.justia.com/patent/7348096
Timestamp: 2019-12-14 18:56:04
Document Index: 63934226

Matched Legal Cases: ['Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60']

US Patent for Flexible thin printed battery and device and method of manufacturing same Patent (Patent # 7,348,096 issued March 25, 2008) - Justia Patents Search
Justia Patents Tape Or Flexible-type Cell Including Tape Fuel Cells Or Subcombination ThereofUS Patent for Flexible thin printed battery and device and method of manufacturing same Patent (Patent # 7,348,096)
Dec 17, 2002 - Eveready Battery Company, Inc.
This application claims benefit under 35 USC 119(e) to the following U.S. provisional patent applications: U.S. Pat. Application No. 60/356,407, U.S. Pat. Application No. 60/356,236, U.S. Pat. Application No. 60/356,213, U.S. Pat. Application No. 60/356,406, U.S. Pat. Application No. 60/356,583, U.S. Pat. Application No. 60/356,247, U.S. Pat. Application No. 60/356,266, and U.S. Pat. Application No. 60/356,584, all filed on Feb. 12, 2002 and pending.
FIG. 1A is an electrochemical cell according to the within invention.
In addition to a binder and solvent system, the zinc ink of the within invention can further include other cell additives to produce beneficial performance attributes. For example, the relatively fine particle size of the zinc employed in the zinc ink of the within invention results in increased gassing. A surfactant known to reduce gassing in alkaline cells has both a phosphate group and polyethylene oxide and/or polypropylene oxide chains. Such a surfactant is available commercially under the Union Carbide tradename Triton QS-44. We have discovered that surfactants of this type are even more beneficial in controlling gassing in acidic electrolytes such as LeClanche or zinc chloride electrolytes. As used herein, a “LeClanche electrolyte” is an electrolyte containing both zinc chloride and ammonium chloride.
Minimum required cathode Test current collector thickness 100 cycles (1 cycle = 6 sec. at 2 mA and 60 12 microns sec. off) 100 cycles (1 cycle = 16 sec. at 8 mA and 60 70 microns sec. off)
Minimum required cathode Test current collector thickness 100 cycles (1 cycle = 6 sec. at 2 mA and 60 6-8 microns sec. off) 100 cycles (1 cycle = 16 sec. at 8 mA and 60 24-30 microns sec. off)
ZiNC1 (weight percent) BINDER (weight percent)
MnO2 (weight BINDER (weight GRAPHITE1 percent) percent) (weight percent)
Co-planar electrode assembly cells were constructed according to this example. An anode was printed using the same anode ink formulation and substrate as in Example 1, and a 0.002 inch thick zinc mesh anode current collector as in Example 1 was affixed to the substrate in the same manner as in Example 1. The anode 34 was screen printed to a size of 50.4 millimeters×6.8 millimeters with an average thickness of 109 millimeters. The cathode current collector and cathode were stenciled using the same formulation as in Example 1 onto the same substrate as the anode to form a co-planar electrode arrangement. The cathode current collector 35 was stenciled to a size of 40 millimeters×27 millimeters×0.036 millimeters, while the cathode ink 37 was stenciled onto the current collector with a thickness of 0.166 millimeters. See FIG. 9. The gap between the cathode and the anode was 2.0 millimeters. The electrode surfaces were wetted up with the same electrolyte as in Example 1, and the same separator paper as in Example 1 was introduced to provide an electrolyte soakup such that a total of 0.6 to 0.7 grams of electrolyte was introduced into the cell. The separator paper in this co-planar arrangement is sized to cover both the anode and the cathode.
.2134 A.667 Signature test: Cathode eff. 10.57% @ 20 mA/1.43 mA/cm2 Cathode eff. 3.23% @ 10 mA/0.71 mA/cm2 Cathode eff. 3.50% @ 5 mA/0.36 mA/cm2 Cathode eff. 6.56% @ 2 mA/0.14 mA/cm2 Cathode eff. 6.00% @ 1 mA/0.07 mA/cm2 .2573 A.7383** Signature test: Cathode eff. 11.21% @ 20 mA/1.43 mA/cm2 Cathode eff. 3.75% @ 10 mA/0.71 mA/cm2 Cathode eff. 3.74% @ 5 mA/0.36 mA/cm2 Cathode eff. 7.64% @ 2 mA/0.14 mA/cm2 Cathode eff. 8.08% @ 1 mA/0.07 mA/cm2 .1658 B.1925 Signature test: Cathode eff. 27.57% @ 20 mA/1.43 mA/cm2 Cathode eff. 28.40% @ 10 mA/0.71 mA/cm2 Cathode eff. 3.23% @ 5 mA/0.36 mA/cm2 Cathode eff. 3.28% @ 2 mA/0.14 mA/cm2 Cathode eff. 1.75% @ 1 mA/0.07 mA/cm2 .1927 B.2029** Signature test: Cathode eff. 56.73% @ 20 mA/1.43 mA/cm2 Cathode eff. 4.85% @ 10 mA/0.71 mA/cm2 Cathode eff. 4.55% @ 5 mA/0.36 mA/cm2 Cathode eff. 5.35% @ 2 mA/0.14 mA/cm2 Cathode eff. 3.48% @ 1 mA/0.07 mA/cm2 AGeneral cathode ink formulation: 9.2 grams Kerr McGee non-milled EMD, 0.6 grams synthetic graphite KS6, 0.2 grams Kureha 1100 PVDF binder, 3.3 mL NMP solvent. BGeneral cathode formulation: 7.0 grams jet-milled EMD, 2.8 grams synthetic graphite KS6, 0.2 grams Hureha 1100 PVDF, 8 mL NMP. **Separator paper coating included cetyltrimethylammonium bromide available commercially as Cetrimide.
Anode input Cathode input (grams zinc) (grams EMD) Polymer separator Test results
Lot 4241-1 .8367 .1073 .008 inches IR drop (180 mV) > mass transfer > activation Lot 4241-2 .5856 .1364 .024 inches IR drop (120 mV) > mass transfer > activation Lot 4241-3 .6315 .2036 .008 inches Mass transfer > IR drop (20 mV) > activation Lot 4241-4 .6497 .1840 .024 inches Mass transfer > IR drop (80 mV) > activation
4. The battery as defined in claim 2, wherein the electrically conductive medium comprises epoxy.
4916035 April 10, 1990 Yamashita et al.
5658684 August 19, 1997 Lake
5747191 May 5, 1998 Lake
5865859 February 2, 1999 Lake
5906661 May 25, 1999 Lake
6025089 February 15, 2000 Lake
6030423 February 29, 2000 Lake
6884546 April 26, 2005 Fujita et al.
19943961 June 2000 DE
0678927 October 1995 EP
0862227 September 1998 EP
1026767 August 2000 EP
1096589 May 2001 EP
58206048 December 1983 JP
2000319381 November 2000 JP
Patent Publication Number: 20030165744
Inventors: Mark A. Schubert (Brunswick, OH), Jing Zhang (Rochester Hills, MI), Guanghong Zheng (Avon, OH), Frank H. Feddrix (Westlake, OH), Richard A. Langan (Parma, OH), Frank B. Tudron (Westlake, OH), Gary R. Tucholski (North Royalton, OH), Abdelkader Hilmi (Danbury, CT), John C. Bailey (Columbia Station, OH), Andrew Webber (Avon Lake, OH)
Assistant Examiner: R. Hodge
Application Number: 10/321,182
Current U.S. Class: Tape Or Flexible-type Cell Including Tape Fuel Cells Or Subcombination Thereof (429/127); Having Seal Feature (429/185)
International Classification: H01M 6/00 (20060101); H01M 2/08 (20060101); H01M 2/20 (20060101);