Temperature adjusting structure and temperature adjusting method for electric power storage device

Patent metadata

Field	Value
Publication number	US-10199700-B2
Application number	US-201414917041-A
Country	US
Kind code	B2
Filing date	Sep 8, 2014
Priority date	Sep 10, 2013
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

In a temperature adjusting structure for an electric power storage device as well as in a temperature adjusting method for an electric power storage device, a temperature adjusting air that exchanges heat with a case in which an electric power generation element is housed is guided in a longitudinal direction of a circulation path. Then, a vortex flow that swirls with the longitudinal direction being a rotational axis is generated in the air that flows through the circulation path, and the vortex flow is brought into contact with a lateral surface of the case.

First claim

The invention claimed is:

1. A temperature adjusting structure for an electric power storage device comprising:
an electric power storage device including electric power storage elements that are aligned in a specified direction, wherein the electric power storage elements are stacked in the specified direction so that stacking surfaces of the electric storage elements face each other without spacers therebetween, each of the electric power storage elements including an electric power generation element and a case that houses the electric storage generation element, the electric power generation element configured to perform charging and discharging;
a circulation path provided on a lateral surface of each of the cases, wherein for each of the cases a longitudinal direction of the circulation path is parallel to a direction in which a bottom surface of the case faces a surface that opposes the bottom surface, the lateral surface being a surface positioned on both sides of the case that are spaced apart in a horizontal direction when the electric power storage device is viewed in the specified direction, the circulation path being configured to guide temperature adjusting air in the longitudinal direction of the circulation path provided on the lateral surface of the case without bringing the air into contact with the stacking surfaces of the electric storage elements, and the air exchanging heat with the case; and
a vortex flow generation section configured to generate a vortex flow of the air that flows into the circulation path, the vortex flow swirling with the longitudinal direction being a rotational axis.

2. The temperature adjusting structure according to claim 1 , wherein
the circulation path includes:
a first wall section opposing the lateral surface in the horizontal direction and extending in the longitudinal direction; and
a second wall section covering a space between the lateral surface and the first wall section in a width direction that is orthogonal to the horizontal direction, the second wall section extending in the longitudinal direction,
the vortex flow generation section includes a blowoff port through which the air flows into the circulation path, and
a length of the blowoff port in the width direction is smaller than a length in the width direction and a length in the horizontal direction of a flow path cross section in the horizontal direction of the circulation path.

3. The temperature adjusting structure according to claim 2 , further comprising:
a partition wall that partitions the circulation path along the longitudinal direction, wherein
the blowoff port is provided in the each circulation path that is partitioned by the partition wall and extends in the longitudinal direction.

4. The temperature adjusting structure according to claim 1 , further comprising:
a supply path that supplies the air in a perpendicular direction to the bottom surface; and
a guide surface that circulates the air along the bottom surface, the air flowing from the supply path to exchange heat with the bottom surface, wherein
the air that circulates along the bottom surface by the guide surface is supplied to the circulation path via the vortex flow generation section.

Assignees

• Toyota Motor Co Ltd

Inventors

• Morioka Satoshi
• Katayama Junta
• Watanabe Hirotaka

Classifications

• H01M10/6563

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

• H01M10/647

  Prismatic or flat cells, e.g. pouch cells · CPC title

• H01M10/613

  Cooling or keeping cold · CPC title

• H01M2220/20

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

• H01M10/6566 Primary

  Means within the gas flow to guide the flow around one or more cells, e.g. manifolds, baffles or other barriers (H01M10/6565 takes precedence) · CPC title