| CPC H01M 50/186 (2021.01) [H01M 50/547 (2021.01); H01M 50/557 (2021.01)] | 9 Claims |
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1. A secondary battery, comprising:
an electrode assembly including a negative electrode plate having a negative electrode tab, a positive electrode plate having a positive electrode tab, and a separator between the negative electrode plate and the positive electrode plate;
a pouch accommodating the electrode assembly, the pouch having a top sealing portion and a bottom sealing portion at an edge thereof that are sealed with the electrode assembly accommodated in the pouch; and
a strip terminal, including:
a negative electrode lead electrically connected to the negative electrode tab,
a positive electrode lead electrically connected to the positive electrode tab, and
a tab film having one end coupled to the negative electrode lead and another end coupled to the positive electrode lead, the tab film insulating the negative electrode lead, the positive electrode lead, and the pouch from one another and including at least one through-hole passing therethrough between the one end and the other end,
wherein the at least one through-hole:
extends along a longitudinal direction of the tab film, and
has a circular shape, an oval shape, a polygonal shape, a straight shape, a curved shape, or a dotted line shape entirely contained within edges of the tab film or has a polygonal shape extending all the way to an inner one of the edges of the tab film such that the polygonal-shaped through-hole is open towards the pouch, and
wherein the at least one through-hole is completely sealed by the top sealing portion and the bottom sealing portion of the pouch such that the top sealing portion directly contacts the bottom sealing portion through the at least one through-hole.
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