Patent ID: 9685643
Date: 2017-06-20
CPC Classifications: H01M,Y02E

Claim:
1. An electric storage device, comprising: an electrode assembly; a case housing the electrode assembly; a plastic member arranged at an outer surface of the case and including a joining surface of the plastic member facing the outer surface of the case; an external terminal supported by the plastic member and electrically connected to the electrode assembly; a sealing member arranged at the outer surface of the case, the sealing member including a joining surface of the sealing member facing the outer surface of the case; and an auxiliary terminal supported by the sealing member, the auxiliary terminal extending from inside to outside the case, being electrically connected to the electrode assembly, and being electrically connected to the external terminal, wherein the plastic member comprises a material having a hardness greater than a hardness of the sealing member, wherein the case includes a first recess which is configured to receive a part of the joining surface of the sealing member in a predetermined region of the outer surface of the case and is provided at a periphery of a through-hole of the case, and a second recess which is configured to receive a part of the joining surface of the plastic member in a predetermined region of the outer surface of the case, which is different from the predetermined region of the outer surface of the case, wherein the plastic member and the sealing member are arranged in a vicinity of each other, and wherein an area of the first recess for the sealing member is greater than an area of the second recess for the plastic member.