Cylindrical Secondary Battery Insulation Member
AssigneeLG Chem, Ltd.
InventorsHan Gab Song, Kyung Min Kim, Min Gyu Kim, Pil Kyu Park
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Abstract
The present disclosure provides an insulation member having excellent mechanical properties having enough shock-absorbing effect in external shock and volume change in a battery and provides a cylindrical secondary battery including the insulation member. The insulation member according to the present disclosure has excellent mechanical properties in high temperature, is composed of polypropylene having narrow molecular weight, and has a fine pattern on the surface.
Claims6
An insulation member disposed on an upper end of a jelly-roll in a secondary battery in which the jelly-roll having a positive electrode, a negative electrode and a separator disposed between the positive electrode and the negative electrode is mounted in a cylindrical battery case,
- wherein the insulation member is made of polypropylene and
- the polypropylene has a tensile strength of from 20 to 30 MPa and a flexural modulus of from 1500 to 1650 MPa at 100° C.
Dependencies are inferred from the claim text.