A battery pack includes a case including a first main wall, a second main wall facing the first main wall, and an uneven portion formed in at least one of the first main wall and the second main wall; and an electrode assembly received in an internal space of the case. The uneven portion may include
A battery pack includes a case including a first main wall, a second main wall facing the first main wall, and an uneven portion formed in at least one of the first main wall and the second main wall; and an electrode assembly received in an internal space of the case. The uneven portion may include a plurality of first uneven portions formed in a central portion of the first main wall, and a plurality of second uneven portions formed in a central portion of the second main wall.
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1. A battery pack comprising: a case comprising a first main wall, a second main wall facing the first main wall, and an uneven portion comprising a plurality of uneven portions formed in at least one of the first main wall and the second main wall, the plurality of uneven portions comprising a plur
1. A battery pack comprising: a case comprising a first main wall, a second main wall facing the first main wall, and an uneven portion comprising a plurality of uneven portions formed in at least one of the first main wall and the second main wall, the plurality of uneven portions comprising a plurality of first uneven portions comprising a convex portion, a concave portion, and a connection portion that are continuously formed in the first main wall such that the convex portion and the concave portion are connected via the connection portion, the convex portion being outwardly convex such that a recess corresponding to the convex portion is formed at an inner surface of the first main wall, the concave portion being outwardly concave such that an embossing corresponding to the concave portion is formed at the inner surface of the first main wall;an electrode assembly received in an internal space of the case; anda cap plate sealing an opening at a first end of the case to protect the electrode assembly, the first end being spaced apart from a second end of the case in a longitudinal direction,wherein the uneven portion is extended from the first end of the case to the second end of the case in the longitudinal direction,wherein the plurality of first uneven portions further comprises another outwardly convex portion spaced apart from the convex portion in a direction transverse to the longitudinal direction, andwherein the first main wall and the second main wall have a curvature, and a curvature radius of the second main wall is greater than a curvature radius of the first main wall. 2. The battery pack of claim 1, wherein the plurality of first uneven portions is formed in a central portion of the first main wall; and wherein the plurality of uneven portions further comprises a plurality of second uneven portions formed in a central portion of the second main wall. 3. The battery pack of claim 2, wherein the plurality of first uneven portions is symmetrically formed with respect to the central portion of the first main wall, and the plurality of second uneven portions is symmetrically formed with respect to the central portion of the second main wall. 4. The battery pack of claim 2, wherein the plurality of first uneven portions is formed by pressing the first main wall, and the plurality of second uneven portions is formed by pressing the second main wall. 5. The battery pack of claim 4, wherein the plurality of first uneven portions is formed by pressing the first main wall from an inside of the case toward an outside of the case, and the plurality of second uneven portions is formed by pressing the second main wall from the inside toward the outside. 6. The battery pack of claim 2, wherein the first main wall is curved, and a gap between first uneven portions of the plurality of first uneven portions is reduced in the curved state of the first main wall. 7. The battery pack of claim 2, wherein the second main wall is curved, and a thickness of second uneven portions of the plurality of second uneven portions is reduced and the second main wall is expanded in the curved state of the second main wall. 8. The battery pack of claim 1, wherein the uneven portion is formed in a length direction of the case. 9. The battery pack of claim 1, wherein the uneven portion is formed in a width direction of the case. 10. The battery pack of claim 1, wherein the uneven portion is elastic. 11. The battery pack of claim 1, wherein a difference between the curvature radius of the second main wall and the curvature radius of the first main wall is about 10 mm to about 30 mm. 12. The battery pack of claim 1, wherein the curvature radius of the second main wall is about 200 mm or greater. 13. The battery pack of claim 10, wherein the electrode assembly is curved along the first main wall and the second main wall by pressing the first main wall and the second main wall. 14. The battery pack of claim 10, wherein the electrode assembly is curved along the first main wall and the second main wall and is inserted into the case. 15. The battery pack of claim 1, further comprising an electrode pin arranged at a top surface portion of the cap plate and electrically connected to the electrode assembly. 16. The battery pack of claim 15, wherein the electrode pin has a first polarity, and the cap plate has a second polarity that is different from the first polarity. 17. The battery pack of claim 1, wherein a first side of the cap plate has a same curvature radius as the first main wall, and a second side of the cap plate has a same curvature radius as the second main wall. 18. The battery pack of claim 17, wherein a curvature is formed in each of the first side and the second side of the cap plate by pressing the first main wall and the second main wall.
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이 특허에 인용된 특허 (2)
Van Lerberghe Steven,FRX, Accumulator device for an electric and/or electronic apparatus having a curved shape.
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