CN-122029685-A - Power storage device, cover, and method for manufacturing power storage device

Abstract

The power storage device includes an electrode body including a current collector, an exterior film covering the electrode body, and a lid body made of a conductive material and sealing the electrode body together with the exterior film. The lid body has a lid body and a joint portion protruding from the lid body toward the electrode body and joined to the current collector.

Inventors

• Kim Hyo Kyoko
• Hodai Kaori
• SASAKI MIHO
• URYU TOSHIFUMI

Assignees

• 大日本印刷株式会社

Dates

Publication Date

20260512

Application Date

20241002

Priority Date

20231002

Claims (7)

1. 1. An electric storage device characterized by comprising: An electrode body including a current collector; An exterior film coating the electrode body, and A cover body comprising a conductive material and sealing the electrode body together with the outer coating film, The cover body has: A cover main body, and And a joint portion protruding from the cover main body toward the electrode body and joined to the current collector.
2. 2. The power storage device according to claim 1, characterized in that: the cover body is joined to the exterior film.
3. 3. The power storage device according to claim 1 or 2, characterized in that: An end of the joint portion on the opposite side of the cover main body is spaced apart from the exterior film.
4. 4. The power storage device according to claim 1 or 2, characterized in that: The joint portion has: A first portion connected to the cap body and extending in a first direction toward the electrode body, and And a second portion connected to the first portion and extending in a second direction intersecting the first direction when viewed from the side of the cover.
5. 5. A cover usable as an exterior of a power storage device, comprising: A cover main body, and And a joint portion protruding from the lid main body and connectable to a current collector of the power storage device.
6. 6. The cover of claim 5, wherein: The joint portion has: a first portion connected to the cover main body and extending in a first direction toward an electrode body of the power storage device, and And a second portion connected to the first portion and extending in a second direction intersecting the first direction when viewed from the side of the cover.
7. 7. A method of manufacturing an electric storage device, characterized by: the power storage device includes: An electrode body including a current collector; An exterior film coating the electrode body, and A cover body comprising a conductive material and sealing the electrode body together with the outer coating film, The cover body has: A cover main body, and A joint portion protruding from the cover main body toward the electrode body and joined to the current collector, The method for manufacturing the power storage device includes a step of joining the joining portion and the current collector.

Description

Power storage device, cover, and method for manufacturing power storage device Technical Field The invention relates to an electric storage device, a cover, and a method of manufacturing the electric storage device. Background Patent document 1 discloses an example of an electric storage device. The power storage device includes an electrode body including a current collector, an exterior body sealing the electrode body, and an electrode terminal connected to the current collector. The exterior body includes an exterior film covering the electrode body, and a cover body joined to the exterior film. The electrode terminal is inserted into the through hole formed in the cap. The end of the current collector is joined to the electrode terminal. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2022-123686. Disclosure of Invention Problems to be solved by the invention In the above-described power storage device, in order to simplify the structure, it is conceivable to construct the lid from a metal, and join the lid and the current collector by ultrasonic bonding, for example. In the above-described power storage device, it may be difficult to easily secure a layout space of the means for joining the lid body and the current collector. Therefore, a poor junction between the lid and the current collector may occur. The invention aims to provide an electric storage device capable of well bonding a cover body and a current collector, a cover body for the electric storage device and a manufacturing method of the electric storage device. Means for solving the problems The power storage device according to the first aspect of the invention includes an electrode body including a current collector, an exterior film covering the electrode body, and a lid body including a conductive material and sealing the electrode body together with the exterior film. The lid body has a lid body, and a joint portion protruding from the lid body toward the electrode body and joined to the current collector. The power storage device of the second aspect of the invention is the power storage device of the first aspect, wherein the cover main body is joined with the exterior film. A power storage device of a third aspect of the invention is the power storage device of the first or second aspect, wherein an end portion of the joint portion on an opposite side from the cover main body is spaced from the exterior film. The power storage device of the fourth aspect of the invention is the power storage device of any one of the first to third aspects, wherein the joint portion has a first portion connected to the lid main body and extending in a first direction toward the electrode body, and a second portion connected to the first portion and extending in a second direction intersecting the first direction when seen from a side of the lid body. The cover according to the fifth aspect of the present invention is a cover usable as an exterior of an electric storage device, and includes a cover main body and a joint portion protruding from the cover main body and connectable to a collector of the electric storage device. A lid of a sixth aspect of the invention is the lid of the fifth aspect, wherein the joint portion has a first portion connected to the lid main body and extending in a first direction toward an electrode body of the power storage device, and a second portion connected to the first portion and extending in a second direction intersecting the first direction when viewed from a side of the lid. In a method for manufacturing an electric storage device according to a seventh aspect of the present invention, the electric storage device includes an electrode body including a current collector, an exterior film covering the electrode body, and a lid body including a conductive material and sealing the electrode body together with the exterior film, the lid body including a lid body, and a joint portion protruding from the lid body to the electrode body and joined to the current collector. The method for manufacturing the power storage device includes a step of joining the joining portion and the current collector. Effects of the invention According to the power storage device, the lid, and the method for manufacturing the power storage device of the present invention, the lid and the current collector can be favorably joined. Drawings Fig. 1A is a perspective view of an electric storage device according to an embodiment. Fig. 1B is a diagram of a method of measuring seal strength of the second seal portion of the power storage device of fig. 1. Fig. 2 is a cross-sectional view showing a layer structure of an exterior film that the power storage device of fig. 1 has. Fig. 3 is a view showing an expanded state of the exterior film of the power storage device of fig. 1. Fig. 4 is a perspective view of a cover provided in the power storage device of fig. 1. Fig. 5 is a sectional view of fig.