POUCH HAVING IMPROVED SAFETY, POUCH-TYPE SECONDARY BATTERY INCLUDING THE SAME, AND MEDIUM-TO-LARGE BATTERY PACK
First Claim
1. A pouch-type battery case comprising:
- a space part accommodating an electrode assembly;
an upper battery case;
a lower battery case; and
a sealing part for sealing the upper and lower battery cases,wherein each of the upper battery case and the lower battery case has a foldable structure formed by bending a spacing edge at least one time, andthe spacing edge is disposed in a protruding direction of an electrode lead of the electrode assembly.
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Accused Products
Abstract
Provided are a pouch-type secondary battery having improved safety, and a battery pack including the pouch-type secondary battery. When inner pressure of a pouch is increased by an overdischarge, the pouch is deformed to separate electrode leads from electrode tabs. When the secondary battery is manufactured, an additional material or device is unnecessary. In addition, since the pouch-type secondary battery fundamentally cuts off electric current when gas is generated therein, the service life and safety of the secondary battery can be significantly improved, and the manufacturing costs and the weight thereof can be reduced. Furthermore, the shape of the secondary battery can be easily modified.
69 Citations
21 Claims
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1. A pouch-type battery case comprising:
- a space part accommodating an electrode assembly;
an upper battery case;
a lower battery case; and
a sealing part for sealing the upper and lower battery cases,wherein each of the upper battery case and the lower battery case has a foldable structure formed by bending a spacing edge at least one time, and the spacing edge is disposed in a protruding direction of an electrode lead of the electrode assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
- a space part accommodating an electrode assembly;
Specification