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US 12,738,611 B2Granted
Energy storage device
AssigneeGS Yuasa International Ltd.
InventorsJun Nakamura, Akio Kawai
Life of this patent
Estimating the term…
Abstract
An energy storage device includes an electrode assembly, a case that houses the electrode assembly, and a metal external terminal disposed in the case, wherein the external terminal includes a flange portion spreading along the case outside the case and a shaft portion extending from the flange portion and penetrating the case, the flange portion is formed of a clad material including a plurality of metal layers stacked in a penetrating direction of the shaft portion, and includes a through hole through which the shaft portion is inserted.
Claims18
An energy storage device comprising:
- an electrode assembly;
- a case that houses the electrode assembly;
- and
- a metal external terminal disposed in the case and welded to a busbar member,
- wherein the external terminal includes:
- a flange portion spreading along the case outside the case;
- and
- a shaft portion extending from the flange portion, penetrating the case, and conductively connected to the electrode assembly,
- wherein the flange portion is formed of a clad material including a plurality of metal layers stacked in a penetrating direction of the shaft portion, and includes a through hole through which the shaft portion is inserted,
- wherein the shaft portion includes:
- an enlarged diameter portion spreading along a surface of the flange portion on a case side;
- and
- a swaged portion spreading along a surface of the flange portion on a side opposite to the case and sandwiching a peripheral edge portion of the through hole in the flange portion between the swaged portion and the enlarged diameter portion,
- wherein a first metal layer that is a metal layer at an end opposite to the case in the penetrating direction among the plurality of metal layers includes:
- a concave part recessed in the penetrating direction or a through hole penetrating in the penetrating direction in a region that is larger than the swaged portion when viewed from the penetrating direction and includes the swaged portion when viewed from the penetrating direction;
- and
- a welding surface welded to the busbar member, which is a surface opposite to the case in the penetrating direction,
- wherein a second metal layer that is a metal layer facing the case in the penetrating direction among the plurality of metal layers includes a through hole through which the shaft portion is inserted,
- wherein the first metal layer contains aluminum or an aluminum-based metal,
- wherein the second metal layer contains copper or a copper-based metal,
- wherein the flange portion includes a convex part protruding in the penetrating direction in the concave part of the first metal layer,
- wherein the convex part is a swelling spontaneously formed by compression of the first metal layer during formation of the swaged portion,
- wherein the convex part is disposed between a peripheral edge of the concave part and a peripheral edge of the swaged portion facing the peripheral edge of the concave part in a direction orthogonal to the penetrating direction, and
- wherein the convex part is disposed entirely within the concave part such that the convex part does not extend onto the welding surface.
21 more elements
An energy storage device comprising:
- an electrode assembly;
- a case that houses the electrode assembly;
- and
- a metal external terminal disposed in the case and welded to a busbar member,
- wherein the external terminal includes:
- a flange portion spreading along an outer surface of the case outside the case;
- and
- a shaft portion extending from the flange portion, penetrating the case, and conductively connected to the electrode assembly,
- wherein the flange portion is formed of a clad material including a plurality of metal layers stacked in a penetrating direction of the shaft portion, and includes a through hole through which the shaft portion is inserted,
- wherein the shaft portion includes:
- an enlarged diameter portion that is formed between the flange portion and the outer surface of the case and spreads along the outer surface of the case, and
- a swaged portion that spreads along a surface of the flange portion on a side opposite to the case and sandwiches a peripheral edge portion of the through hole in the flange portion between the swaged portion and the enlarged diameter portion,
- wherein a first metal layer that is a metal layer opposite to the case in the penetrating direction among the plurality of metal layers includes:
- a concave part recessed in the penetrating direction or a through hole penetrating in the penetrating direction in a region that is larger than the swaged portion when viewed from the penetrating direction and includes the swaged portion when viewed from the penetrating direction;
- and
- a welding surface welded to the busbar member, which is a surface opposite to the case in the penetrating direction,
- wherein a second metal layer that is a metal layer facing the case in the penetrating direction among the plurality of metal layers includes a through hole through which the shaft portion is inserted,
- wherein the first metal layer contains aluminum or an aluminum-based metal,
- wherein the second metal layer contains copper or a copper-based metal,
- wherein the flange portion includes a convex part protruding in the penetrating direction in the concave part of the first metal layer,
- wherein the convex part is a swelling spontaneously formed by compression of the first metal layer during formation of the swaged portion,
- wherein the convex part is disposed between a peripheral edge of the concave part and a peripheral edge of the swaged portion facing the peripheral edge of the concave part in a direction orthogonal to the penetrating direction, and
- wherein the convex part is disposed entirely within the concave part such that the convex part does not extend onto the welding surface.
20 more elements
An energy storage device comprising:
- an electrode assembly;
- a case that houses the electrode assembly;
- and
- a metal external terminal disposed in the case and welded to a busbar member,
- wherein the external terminal includes:
- a flange portion spreading along an outer surface of the case outside the case;
- and
- a shaft portion extending from the flange portion, penetrating the case, and conductively connected to the electrode assembly,
- wherein the flange portion is formed of a clad material including a plurality of metal layers stacked in a penetrating direction of the shaft portion, and includes a through hole through which the shaft portion is inserted,
- wherein the shaft portion includes:
- an enlarged diameter portion that is formed between the flange portion and the outer surface of the case and spreads along the outer surface of the case, and
- a swaged portion that spreads along a surface of the flange portion on a side opposite to the case and sandwiches a peripheral edge portion of the through hole in the flange portion between the swaged portion and the enlarged diameter portion,
- wherein a first metal layer that is a metal layer opposite to the case in the penetrating direction among the plurality of metal layers includes:
- a concave part recessed in the penetrating direction or a through hole penetrating in the penetrating direction in a region that is larger than the swaged portion when viewed from the penetrating direction and includes the swaged portion when viewed from the penetrating direction, and
- a welding surface welded to the busbar member, which is a surface opposite to the case in the penetrating direction,
- wherein a second metal layer that is a metal layer facing the case in the penetrating direction among the plurality of metal layers includes a through hole through which the shaft portion is inserted,
- wherein the first metal layer contains aluminum or an aluminum-based metal,
- wherein the second metal layer contains copper or a copper-based metal,
- wherein the surface of the swaged portion on the side opposite the case is positioned farther from the case than the surface of the flange portion on the side opposite the case in the penetrating direction,
- wherein the surface of the swaged portion on the side opposite the case is not welded to the flange portion,
- wherein the flange portion includes a convex part protruding in the penetrating direction in the concave part of the first metal layer, and
- wherein the convex part is disposed entirely within the concave part such that the convex part does not extend onto the welding surface.
19 more elements
Dependencies are inferred from the claim text.