公开(公告)号：US20210062955A1

公开(公告)日：2021-03-04

申请号：US16960012

申请日：2019-03-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： YUJI YAMAGISHI ,  RYOSUKE USUI ,  YUUICHI ABE ,  SHUN AOTA ,  RIKAKO IWASAKI

IPC: F16L59/02 ,  C01B33/16

Abstract: Provided is a thermal insulator which can be prevented from having gaps. The thermal insulator includes a nonwoven fabric, and xerogel in interior spaces of the nonwoven fabric. The thermal insulator has a plurality of protrusions on a surface of the thermal insulator, a height of the protrusion ranges from 0.10t to 0.25t inclusive and a size of the protrusion at the surface of the thermal insulator ranges from t to 5t inclusive, where t is a thickness of the thermal insulator, and pores are provided inside the thermal insulator in a region provided with the protrusions.

公开(公告)号：US20210351453A1

公开(公告)日：2021-11-11

申请号：US17277754

申请日：2019-10-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SHUN AOTA

IPC: H01M10/658 ,  H01M10/613 ,  H01M10/651 ,  H01M10/653 ,  H01M50/209 ,  H01M50/242 ,  F16L59/04

Abstract: A heat-insulating sheet includes a fiber sheet having spaces therein and silica xerogel held in the spaces of the fiber sheet. The heat-insulating sheet includes a first region located at a peripheral portion of the heat-insulating sheet and a second region surrounded by the first region. A compression rate of the second region of the heat-insulating sheet in response to a pressure of 1 MPa applied to the second region is smaller than a compression rate of the first region of the heat-insulating sheet in response to a pressure of 1 MPa applied to the first region. The heat-insulating sheet reduces a compressive strain while maintaining heat insulation performance.
The heat-insulating sheet may be installed in a secondary battery and enhances reliability of the secondary battery against a swell of the battery due to an increase of pressure inside a cell of the battery.