Laminate-type power storage element
AssigneeFdk Corporation
InventorsMisako Ikeyama, Rei Hanamura, Ryuji Ito, Hiroshi Yanagi
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Abstract
In a laminate-type power storage element, laminated films forming an exterior body are each formed by sandwiching a metal layer between a resin layer and a heat sealing layer. An electrode body includes a positive electrode and a negative electrode disposed opposite to each other across a separator and is enclosed together with a non-aqueous organic electrolyte solution inside the exterior body. Particles included in the positive electrode or negative electrode have a D90 particle size less than or equal to the thickness of the heat sealing layer.
Claims5
A laminate-type power storage element comprising:
- an exterior body formed of laminated films, the laminated films each being formed by sandwiching a metal layer between a resin layer and a heat sealing layer
- an electrode body including a positive electrode and a negative electrode disposed opposite to each other across a separator, the electrode body being enclosed together with a non-aqueous organic electrolyte solution inside the exterior body, wherein a D90 value of a particle size distribution of first particles included in the positive electrode is between 0.61 and 1 times a thickness of the heal sealing layer, and the first particles are made of a material with the largest maximum particle size among materials included in the positive electrode;
- a first terminal connecting to the positive electrode and extending to outside from one side of the laminated films;
- and
- a second terminal connecting to the negative electrode and extending to outside from one side of the laminated films,
- wherein among surfaces of the positive electrode and the first terminal, an entire surface of the positive electrode, which is opposite to a surface in contact with the separator, is thermally bonded to the heat-sealing layer of one of the laminated films, and
- wherein the negative electrode is metal lithium or a lithium alloy in a foil or flat plate form.
Dependencies are inferred from the claim text.