Power storage device

Patent metadata

Field	Value
Publication number	US-11081740-B2
Application number	US-201916365155-A
Country	US
Kind code	B2
Filing date	Mar 26, 2019
Priority date	Apr 6, 2018
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

A power storage device includes: a power storage module; a housing case having a housing space formed therein and configured to house the power storage module in the housing space; a cooler arranged in the housing case and configured to cool air sent toward the power storage module; a storage portion configured to store condensation water generated as a result of cooling by the cooler; and an air permeable film configured to allow a vapor generated from the condensation water stored in the storage portion to pass therethrough. The storage portion and the air permeable film are provided in a separated space separated from the housing space. The vapor passes through the separated space and reaches the air permeable film.

First claim

What is claimed is:

1. A power storage device comprising:
a power storage module;
a housing case having a housing space formed therein and configured to house the power storage module in the housing space;
a cooler arranged in the housing case and configured to cool air sent toward the power storage module;
a storage portion configured to store condensation water generated as a result of cooling by the cooler; and
an air permeable film configured to allow a vapor generated from the condensation water stored in the storage portion to pass therethrough,
the storage portion and the air permeable film being provided in a separated space separated from the housing space,
the vapor passing through the separated space and reaching the air permeable film, wherein
the housing case includes a bottom portion provided with an opening,
the storage portion includes a bottom wall portion provided to cover the opening from a lower side of the bottom portion and facing the bottom portion, and a peripheral wall portion provided to rise from a peripheral edge of the bottom wall portion and connected to the bottom portion,
the bottom wall portion includes a storage surface defining a storage region where the condensation water having passed through the opening is stored, and a placement surface located above the storage surface and having the air permeable film placed thereon, and
the placement surface is located below the bottom portion of the housing.

2. The power storage device according to claim 1 , further comprising
a protective member provided to cover the storage portion from the lower side.

3. The power storage device according to claim 1 , further comprising
an air duct arranged in the housing case so as to be located above the opening, and configured to allow the air sent toward the power storage module to flow therethrough, wherein
the cooler is arranged in the air duct,
the air duct is provided with an outlet configured to guide the condensation water to the opening, and
a seal member configured to hermetically seal a space where the opening and the outlet communicate with each other is provided between the air duct and the bottom portion of the housing case.

Assignees

• Toyota Motor Co Ltd

Inventors

• Uchiyama Toshio
• Inoue Shigeyuki

Classifications

• H01M50/271

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

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/6563

  with forced flow, e.g. by blowers · CPC title

• H01M50/342

  Non-re-sealable arrangements · CPC title