Energy storage device and energy storage device production method

Abstract

An energy storage device includes an electrode body in which an electrode is stacked, a container in which the electrode body is accommodated, a cover plate structure including a cover plate that closes the container, and a spacer that is attached to the electrode body. The spacer includes a positioning unit that positions the cover plate structure. An engaging unit, engaging with the positioning unit, is provided in the cover plate structure.

1 . An energy storage device, comprising:
 an electrode body in which an electrode is stacked;   a container in which the electrode body is accommodated;   a cover plate structure including a cover plate that closes the container; and   a spacer that is attached to the electrode body,   wherein the spacer includes a positioning unit that positions the cover plate structure, and   wherein an engaging unit, engaging with the positioning unit, is provided in the cover plate structure.   
     
     
         2 . The energy storage device according to  claim 1 , wherein the cover plate structure includes a lower insulating member, and
 wherein the lower insulating member includes the engaging unit.   
     
     
         3 . The energy storage device according to  claim 2 , wherein the lower insulating member is provided between the cover plate and the electrode body. 
     
     
         4 . The energy storage device according to  claim 2 , wherein the positioning unit projects from a wall portion of the spacer toward the electrode body on an outer surface of the lower insulating member opposite to the cover plate. 
     
     
         5 . The energy storage device according to  claim 2 , wherein the engaging unit projects from one end of the lower insulating plate toward the spacer. 
     
     
         6 . An energy storage device, comprising:
 an electrode body in which an electrode is stacked;   a container in which the electrode body is accommodated;   a cover plate structure including a cover plate that closes the container; and   a spacer that is attached to the electrode body,   wherein the spacer includes a positioning unit that positions the cover plate structure,   wherein an engaging unit, engaging with the positioning unit, is provided in the cover plate structure, and   wherein the engaging unit includes a recess that is recessed along a first direction which is a long-side direction of the cover plate.   
     
     
         7 . The energy storage device according to  claim 6 , wherein the engaging unit projects from one end of a lower insulating plate provided between the cover plate and the electrode body toward the spacer,
 wherein the engaging unit includes ribs extending from the one end of the lower insulating plate, and   wherein the recess is formed so as to be sandwiched between the ribs.   
     
     
         8 . An energy storage device, comprising:
 an electrode body in which an electrode is stacked;   a container in which the electrode body is accommodated;   a cover plate structure including a cover plate that closes the container; and   a spacer that is attached to the electrode body,   wherein the spacer includes a positioning unit that positions the cover plate structure,   wherein an engaging unit, engaging with the positioning unit, is provided in the cover plate structure, and   wherein the positioning unit and the engaging unit are provided in different members and engage in a first direction which is a long-side direction of the cover plate.