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US 2026/0312235 A1Published application
Secondary battery and method of manufacturing same
AssigneePrime Planet Energy & Solutions, Inc.
InventorTomonori MAEDA
Life of this patent
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Abstract
A secondary battery includes: an electrode assembly including a first electrode and a second electrode; and an exterior container that accommodates the electrode assembly. A separator of the electrode assembly has a folded portion extending in a form of a strip in a first direction in a vicinity of at least one of a pair of first end sides in a first surface of the exterior container, the folded portion is provided to face a second surface of the exterior container orthogonal to the first surface.
Claims11
A secondary battery comprising:
- an electrode assembly including a first electrode, a second electrode having a polarity different from a polarity of the first electrode, and a separator provided between the first electrode and the second electrode;
- and
- an exterior container that has a prismatic shape and that accommodates the electrode assembly, wherein
- the exterior container has a pair of first surfaces, a pair of second surfaces substantially orthogonal to the first surfaces, and a pair of third surfaces substantially orthogonal to the first surfaces and the second surfaces, and an area of each of the first surfaces is larger than each of an area of each of the second surfaces and an area of each of the third surfaces,
- the first surface has a substantially rectangular shape including a pair of first end sides each extending in a first direction and a pair of second end sides each extending in a second direction substantially orthogonal to the first direction,
- the electrode assembly has a first main surface and a second main surface that respectively face the pair of first surfaces, and
- the separator has a folded portion extending in a form of a strip in the first direction in a vicinity of at least one of the pair of first end sides, and the folded portion is provided to face a corresponding one of the second surfaces of the exterior container.
4 more elements
A method of manufacturing a secondary battery, the method comprising:
- preparing an electrode assembly that has a first main surface and a second main surface and that includes a first electrode, a second electrode having a polarity different from a polarity of the first electrode, and a separator provided between the first electrode and the second electrode;
- and
- accommodating the electrode assembly into an exterior container, wherein
- the exterior container has a prismatic shape, and has a pair of first surfaces, a pair of second surfaces substantially orthogonal to the first surfaces, and a pair of third surfaces substantially orthogonal to the first surfaces and the second surfaces, and an area of each of the first surfaces is larger than each of an area of each of the second surfaces and an area of each of the third surfaces,
- the first surface has a substantially rectangular shape including a pair of first end sides each extending in a first direction and a pair of second end sides each extending in a second direction substantially orthogonal to the first direction,
- the preparing the electrode assembly includes bending the separator so as to form a folded portion extending in a form of a strip in the first direction in a vicinity of at least one of the pair of first end sides, and
- the accommodating the electrode assembly into the exterior container includes inserting the electrode assembly into the exterior container such that the first main surface and the second main surface face the pair of first surfaces respectively and the folded portion faces a corresponding one of the second surfaces.
4 more elements
Dependencies are inferred from the claim text.