Energy storage device, winding apparatus, and winding method
AssigneeGS Yuasa International Ltd.
InventorsAkihiko Miyazaki, Sumio Mori, Tomonori Kako
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Abstract
An energy storage device includes: a core; and a wound body including, layered and wound around the core: a positive electrode, a negative electrode, and two separators, one of which is interposed between the positive electrode and the negative electrode and each having a first surface and a second surface. The first surface has thermal bonding properties superior to thermal bonding properties of the second surface, and at least one of the two separators is bonded to the core via the first surface thereof.
Claims22
An energy storage device comprising:
- a core;
- and
- a wound body which is wound around the core, the wound body comprising:
- a positive electrode;
- a negative electrode;
- and
- first and second separators, the first separator being interposed between the positive electrode and the negative electrode, and each of the first and second separators having a first surface and a second surface, the first surface having thermal bonding properties greater than thermal bonding properties of the second surface,
- wherein the first separator comprises:
- a first portion bonded to a first side of the core;
- and
- a second portion bonded to the second separator on a second side of the core opposite the first side when viewed from an winding axis direction around which the wound body is wound.
A wound body for an energy storage device, the wound body being wrapped around a core and comprising:
- a positive electrode;
- a negative electrode;
- a first separator which:
- is bonded to a first side of the core;
- is interposed between the positive electrode and the negative electrode;
- and
- includes first and second layers, the first layer having thermal bonding properties greater than thermal bonding properties of the second layer;
- and
- a second separator which:
- is bonded to the first separator on a second side of the core opposite the first side when viewed from an winding axis direction around which the wound body is wound;
- is interposed between the negative electrode and the core;
- and
- includes third and fourth layers, the third layer having thermal bonding properties greater than thermal bonding properties of the fourth layer.
Dependencies are inferred from the claim text.