Energy storage device and energy storage module

Patent metadata

Field	Value
Publication number	US-11387482-B2
Application number	US-201816621653-A
Country	US
Kind code	B2
Filing date	Jun 18, 2018
Priority date	Jun 19, 2017
Publication date	Jul 12, 2022
Grant date	Jul 12, 2022

Abstract

An energy storage device includes: a case having a bottom wall and a ceiling wall, a front wall and a rear wall having areas smaller than an area of the ceiling wall respectively, and a pair of side walls having areas larger than the area of the ceiling wall respectively; a stacked electrode assembly accommodated in the inside of the case, and having a plurality of positive electrode plates and a plurality of negative electrode plates having a plate shape and stacked to each other with a separator interposed between the positive electrode plate and the negative electrode plate, and a positive electrode tab and a negative electrode tab extending from the positive electrode plates and the negative electrode plates toward the front wall; and an external terminal mounted on the front wall and electrically connected with the positive electrode tab or the negative electrode tab.

First claim

The invention claimed is:

1. An energy storage module comprising:
a plurality of energy storage devices, each energy storage device of the plurality of energy storage devices comprising:
a case formed in a rectangular parallelepiped shape, and having a bottom wall and a ceiling wall, a front wall and a rear wall having areas smaller than an area of the ceiling wall respectively, and a pair of side walls having areas larger than the area of the ceiling wall respectively;
an electrode assembly accommodated in the inside of the case, and having a positive electrode plate and a negative electrode plate stacked to each other with a separator interposed between the positive electrode plate and the negative electrode plate, and a positive electrode tab and a negative electrode tab extending from the positive electrode plate and the negative electrode plate toward the front wall;
an external terminal mounted on the front wall and electrically connected with the positive electrode tab or the negative electrode tab; and
a rupture valve mounted on the rear wall,
wherein the bottom wall is mounted on a mounting surface, and the front wall is raised from the bottom wall,
the rupture valve is mounted at a position shifted from a center of the rear wall in a direction in which the bottom wall and the ceiling wall opposedly face each other, and
wherein the rupture valve includes a flap-shaped portion,

the energy storage module further comprising,
a holder capable of holding the plurality of energy storage devices in a state where the energy storage devices are arranged in two rows,
wherein the energy storage devices disposed adjacently to each other in the each row have the side walls thereof opposedly face each other,
the energy storage devices disposed adjacently to each other between the rows have rear walls thereof opposedly face each other, and
a shifted position of the rupture valve mounted on one of the two rear walls which opposedly face each other between the rows and a shifted position of the rupture valve mounted on the other of the two rear walls which opposedly face each other between the rows are disposed opposite to each other with respect to a center of the rear wall in a direction in which the bottom wall and the ceiling wall opposedly face each other.

2. The energy storage module according to claim 1 , each said energy storage device further comprising a porous sheet disposed between an inner surface of the rear wall and the stacked electrode assembly and covering an inner surface of the rupture valve.

3. The energy storage module according to claim 1 , wherein the case includes: a case body forming the bottom wall, the ceiling wall, the rear wall and the pair of side walls; and a lid plate forming the front wall and being capable of sealing an opening of the case body.

4. An energy storage module comprising:
a plurality of energy storage devices, each of said energy storage devices comprising:
a case formed in a rectangular parallelepiped shape, and having a bottom wall and a ceiling wall, a front wall and a rear wall having areas smaller than an area of the ceiling wall respectively, and a pair of side walls having areas larger than the area of the ceiling wall respectively;
a stacked electrode assembly accommodated in the inside of the case, and having a plurality of positive electrode plates and a plurality of negative electrode plates having a plate shape and stacked to each other with a separator interposed between the positive electrode plate and the negative electrode plate, and a positive electrode tab and a negative electrode tab extending from the positive electrode plates and the negative electrode plates toward the front wall;
an external terminal mounted on the front wall and electrically connected with the positive electrode tab or the negative electrode tab; and
a rupture valve mounted on the rear wall,
wherein the bottom wall is mounted on a mounting surface, and the front wall is raised from the bottom wall, and
the rupture valve is mounted at a position shifted from a center of the rear wall in a direction in which the bottom wall and the ceiling wall opposedly face each other; and

a holder capable of holding the plurality of energy storage devices in a state where the energy storage devices are arranged in two rows,
wherein the energy storage devices disposed adjacently to each other in the each row have the side walls thereof opposedly face each other,
the energy storage devices disposed adjacently to each other between the rows have rear walls thereof opposedly face each other,
a shifted position of the rupture valve mounted on one of the two rear walls which opposedly face each other between the rows and a shifted position of the rupture valve mounted on the other of the two rear walls which opposedly face each other between the rows are disposed opposite to each other with respect to a center of the rear wall in a direction in which the bottom wall and the ceiling wall opposedly face each other, and
wherein the rupture valve mounted on one of the two rear walls which opposedly face each other between the rows and the rupture valve mounted on the other of the two rear walls which opposedly face each other between the rows do not overlap with each other in the direction that the bottom wall and the ceiling wall opposedly face each other.

5. The energy storage module according to claim 4 , wherein a gas discharge passage is defined between one and the other of the two rear walls which opposedly face each other between the rows.

6. The energy storage module according to claim 1 , wherein the rupture valve mounted on one of the two rear walls which opposedly face each other between the rows and the rupture valve mounted on the other of the two rear walls which opposedly face each other between the rows do not overlap with each other in the direction that the bottom wall and the ceiling wall opposedly face each other.

7. The energy storage module according to claim 2 , wherein the porous sheet comprises a sheet comprising a cushion property, and
wherein the porous sheet is configured to form a flow passage for discharging a gas to an outside of the energy storage device through the rupture valve.

8. The energy storage module according to claim 1 , wherein the shifted position of the rupture valve mounted on one of the two rear walls which opposedly face each other between the rows and the shifted position of the rupture valve mounted on the other of the two rear walls which opposedly face each other between the rows are disposed opposite to each other with respect to a center of the rear wall in a vertical direction.

9. An energy storage module comprising:
a plurality of energy storage devices, each energy storage device of the plurality of energy storage devices comprising:
a case formed in a rectangular parallelepiped shape, and having a bottom wall and a ceiling wall, a front wall and a rear wall having areas smaller than an area of the ceiling wall respectively, and a pair of side walls having areas larger than the area of the ceiling wall respectively;
an electrode assembly accommodated in the inside of the case, and having a positive electrode plate and a negative electrode plate stacked to each other with a separator interposed between the positive electrode plate and the negative electrode plate, and a positive electrode tab and a negative electrode tab extending from the positive electrode plate and the negative electrode plate toward the front wall;
an external terminal mounted on the front wall and electrically connected with the positive electrode tab or the negative electrode tab;
a rupture valve mounted on the rear wall; and
a porous sheet disposed between an inner surfac

Assignees

• Bosch Gmbh Robert
• Gs Yuasa Int Ltd

Inventors

• Aikata Riku
• Kozono Sho

Classifications

• H01M50/227

  Organic material · CPC title

• H01M50/536

  characterised by the method of fixing the leads to the electrodes, e.g. by welding · CPC title

• H01M50/209

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

• H01M50/271

  Lids or covers for the racks or secondary casings · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title