| CPC H01M 50/105 (2021.01) [H01M 50/10 (2021.01); H01M 50/119 (2021.01); H01M 50/183 (2021.01); H01M 50/184 (2021.01)] | 13 Claims |
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1. A pouch-type secondary battery comprising:
a case including a pair of forming parts including a space for housing an electrode assembly;
sealing parts formed by adhering the case along outer peripheries of the electrode assembly;
folding parts formed by folding the sealing parts of surfaces on which an electrode tab drawn to an outside of the case is not formed, the folding parts do not protrude from the case in the thickness direction of the electrode assembly; and
an adhesive member disposed between the folding part and the case,
wherein a depth of the forming part is more than a height of the folding part,
wherein an angle of the forming part is determined according to a depth of the forming part, and as the depth of the forming part increases, the angle of the forming part decreases,
wherein a thickness of the adhesive member is determined according to a depth of the forming part, and as the depth of the forming part increases, the thickness of the adhesive member decreases,
wherein the depth of the forming part is 3.8 mm or more and 7.0 mm or less, the thickness of the adhesive member is 0.36 mm or more and 2.12 mm or less, and the angle of the forming part is 96 degrees or more and 114 degrees or less, and
wherein a height of the folding part has a relationship with a thickness of the electrode assembly as the following equation:
H≤T/2
(wherein, H is the height of the folding part, T is the thickness of the electrode assembly, based on a cross-section perpendicular to a direction in which the electrode tabs of the electrode assembly are drawn out).
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