公开(公告)号：US20230369689A1

公开(公告)日：2023-11-16

申请号：US18026994

申请日：2021-09-30

申请人： DAI NIPPON PRINTING CO., LTD.

发明人： Kenta HIRAKI ,  Chihiro NAKAMURA ,  Miho SASAKI ,  Atsuko TAKAHAGI

IPC分类号： H01M50/129 ,  H01M50/131

CPC分类号： H01M50/129 ,  H01M50/131

摘要： An exterior material for power storage devices which is formed from at least a layered body comprising a base material layer, a barrier layer, and a heat-fusible resin layer in this order, wherein the base material layer contains a resin film, the resin film has a shrinkage ratio of 1.0% to less than 5.0% when immersed in hot water at 95° C. for 30 minutes, and the resin film has a stress value, at 10% stretching in the tensile test described hereafter, of 100 MPa or higher in both the machine direction and the transverse direction. After storing a sample in a 23° C., 40% RH environment for 24 hours, the tensile test is performed under conditions of a sample width of 6 mm, a gauge length of 35 mm, and a tension rate of 300 mm/min in a 23° C., 40% RH environment, and the stress value at 10% stretching (displacement of 3.5 mm) is measured.

公开(公告)号：US20230361393A1

公开(公告)日：2023-11-09

申请号：US18027262

申请日：2021-09-30

申请人： DAI NIPPON PRINTING CO., LTD.

发明人： Kenta HIRAKI ,  Chihiro NAKAMURA ,  Miho SASAKI ,  Atsuko TAKAHAGI

IPC分类号： H01M50/121 ,  H01M50/131 ,  H01M50/126

CPC分类号： H01M50/121 ,  H01M50/131 ,  H01M50/126

摘要： A power storage device packaging material includes a laminate including at least a base material layer, a barrier layer, and a heat-sealable resin layer in this order, wherein the base material layer contains a polyester film, and the polyester film has a work hardening exponent of 1.6 or more and 3.0 or less in both longitudinal and width directions, with a difference of 0.5 or less between the work hardening exponents in the longitudinal and width directions, an intrinsic viscosity of 0.66 or more and 0.95 or less, and a rigid amorphous fraction of 28% or more and 60% or less.