ELECTRICAL ENERGY STORAGE CELL AND ELECTRICAL ENERGY STORAGE MODULE INCLUDING THE SAME
First Claim
1. An electrical energy storage cell, comprising:
- a flat roll electrode that includes a strip of positive electrode having a positive electrode current collector foil and a positive electrode layer formed thereon, a strip of negative electrode having an electrode current collector foil and a negative electrode layer formed thereon, and a strip of electrically insulated separator, the strip of positive electrode and the strip of negative electrode being wound into a flat roll configuration with the strip of electrically insulated separator sandwiched therebetween;
a sealed casing that hermetically seals the flat roll electrode impregnated with an electrolyte; and
a positive terminal and a negative terminal each electrically insulated from the sealed casing, connected to the positive current collector foil and the negative current collector foil, respectively;
wherein the positive current collector foil and the negative current collector foil oppositely extend away from the separator along a roll core axis, and each of the foils include edge portions having no positive layer or negative layer formed therewith;
each of the edge portions is configured to include a cutaway portion where part of the edge portions is not existing so that the separator is exposed at the cutaway portion, and a non-cutaway portion constituting portions other than the cutaway portion;
each of the cathode current collector foil and the anode current collector foil is electrically coupled together in a lamination direction at the non-cutaway portions and electrically connected to the positive terminal and the negative terminal, respectively; and
an electrolyte reservoir that makes a contact with the exposed separator is provided at each of the cutaway portions.
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Accused Products
Abstract
The storage cell comprises a flat roll electrode that includes a strip of positive electrode having a positive electrode current collector foil and a positive electrode layer formed thereon, a strip of negative electrode having an electrode current collector foil and a negative electrode layer formed, and a strip of electrically insulated separator, the strip of positive electrode and the strip of negative electrode being wound into a flat roll configuration with the strip of electrically insulated separator sandwiched therebetween; a sealed casing that hermetically seals the flat roll electrode impregnated with an electrolyte; a positive terminal and a negative terminal each electrically insulated from the sealed casing, connected to the positive current collector foil and the negative current collector foil, respectively.
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Citations
7 Claims
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1. An electrical energy storage cell, comprising:
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a flat roll electrode that includes a strip of positive electrode having a positive electrode current collector foil and a positive electrode layer formed thereon, a strip of negative electrode having an electrode current collector foil and a negative electrode layer formed thereon, and a strip of electrically insulated separator, the strip of positive electrode and the strip of negative electrode being wound into a flat roll configuration with the strip of electrically insulated separator sandwiched therebetween; a sealed casing that hermetically seals the flat roll electrode impregnated with an electrolyte; and a positive terminal and a negative terminal each electrically insulated from the sealed casing, connected to the positive current collector foil and the negative current collector foil, respectively; wherein the positive current collector foil and the negative current collector foil oppositely extend away from the separator along a roll core axis, and each of the foils include edge portions having no positive layer or negative layer formed therewith; each of the edge portions is configured to include a cutaway portion where part of the edge portions is not existing so that the separator is exposed at the cutaway portion, and a non-cutaway portion constituting portions other than the cutaway portion; each of the cathode current collector foil and the anode current collector foil is electrically coupled together in a lamination direction at the non-cutaway portions and electrically connected to the positive terminal and the negative terminal, respectively; and an electrolyte reservoir that makes a contact with the exposed separator is provided at each of the cutaway portions. - View Dependent Claims (2, 3, 4, 6, 7)
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5. An electrical energy storage cell, comprising:
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a flat roll electrode that includes a strip of positive electrode having a positive electrode current collector foil and a positive electrode layer formed thereon, a strip of negative electrode having an electrode current collector foil and a negative electrode layer formed thereon, and a strip of electrically insulated separator, the strip of positive electrode and the strip of negative electrode being wound into a flat roll configuration with the strip of electrically insulated separator sandwiched therebetween; a sealed casing that hermetically seals the flat roll electrode impregnated with an electrolyte; and a positive terminal and a negative terminal each electrically insulated from the sealed casing, connected to the positive current collector foil and the negative current collector foil, respectively; wherein the positive current collector foil and the negative current collector foil oppositely extend away from the separator along a roll core axis, and each of the foils include edge portions having no positive layer or negative layer formed therewith; each of the cathode current collector foil and the anode current collector foil is electrically coupled together in a lamination direction at the non-cutaway portions and each electrically connected to the cathode terminal and the anode terminal, respectively; an inter-current-collector-foil electrolyte reservoir are formed on second surfaces of the cathode and the anode current collector foils; and the pore diameter in the electrolyte reservoir is larger than that of the separator, at least either one of the cathode current collector foil or the anode current collector foil is provided with through-holes.
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Specification