Power storage module

Patent metadata

Field	Value
Publication number	US-2015147613-A1
Application number	US-201314402466-A
Country	US
Kind code	A1
Filing date	Apr 18, 2013
Priority date	May 31, 2012
Publication date	May 28, 2015
Grant date	—

Abstract

A plurality of power storage cells and a plurality of power storage cell holders are stacked alternately in the stacking direction. End plates are superimposed at opposite ends of the power storage cells and power storage cell holders. The end plates are connected by a frame, the frame is covered by an insulator, and the plurality of power storage cells are electrically connected by a bus bar plate, forming a power storage module. Since the surface of the power storage cell is formed from a covered portion covered by the condensation-preventing sheet and a non-covered portion not covered by the condensation-preventing sheet, and the non-covered portion is covered by the power storage cell holder, the insulator, and the bus bar plate, the non-covered portion is covered as much as possible to provide heat insulation, minimizing occurrence of condensed water and preventing formation of a liquid junction.

First claim

1 . A power storage module comprising a plurality of power storage cells and a plurality of power storage cell holders that are stacked alternately in a stacking direction, a pair of end plates that are superimposed at opposite ends in the stacking direction of the power storage cells and the power storage cell holders, a frame that connects the pair of end plates, an insulating insulator that covers the frame, and an insulating bus bar plate that has a metal plate electrically connecting the plurality of power storage cells to each other, wherein
a surface of the power storage cell comprises a covered portion that is covered by a condensation-preventing sheet and a non-covered portion that is not covered by the condensation-preventing sheet, and the non-covered portion is covered by the power storage cell holder, the insulator, and the bus bar plate.

2 . The power storage module according to claim 1 , wherein the plurality of power storage cell holders comprise a thermistor retaining portion that retains a thermistor for measuring a temperature of the power storage cell, the thermistor retaining portion is disposed at a position of the power storage cell holder where the power storage cell holder covers the non-covered portion of the power storage cell, the number of thermistors is smaller than the number of power storage cell holders, and an opening is formed in those of the thermistor retaining portions into which the thermistor is not fitted, the opening communicating with the non-covered portion.

3 . The power storage module according to claim 2 , wherein the insulator comprises a first partition wall extending along the stacking direction between the opening and the frame.

4 . The power storage module according to claim 3 , wherein among the plurality of power storage cell holders the pair of power storage cell holders that are adjacent to the pair of end plates comprise a second partition wall surrounding the opening in cooperation with the first partition wall.

Assignees

• Honda Motor Co Ltd
• Gs Yuasa Int Ltd

Inventors

• Hayashida Atsushi
• IKEYA Tsubasa
• Kawata Masao
• Ishiguro Makoto

Classifications

• H01M10/486 Primary

  for measuring temperature · CPC title

• H01M50/522

  Inorganic material · CPC title

• H01M50/503

  characterised by the shape of the interconnectors · CPC title

• H01M50/209

  adapted for prismatic or rectangular cells (H01M50/216 takes precedence) · CPC title

• H01M50/264

  for cells or batteries, e.g. straps, tie rods or peripheral frames · CPC title