Battery pack exhaust duct and battery pack

Patent metadata

Field	Value
Publication number	US-2021066690-A1
Application number	US-201916977161-A
Country	US
Kind code	A1
Filing date	Feb 13, 2019
Priority date	Mar 12, 2018
Publication date	Mar 4, 2021
Grant date	—

Abstract

A battery pack exhaust duct includes a guide tube, an exhaust inlet, an exhaust outlet, and exhaust guide components. The exhaust guide components include first and second exhaust guide components. Each of the exhaust guide components has a first part and a second part. The first part has a first end that is nearer to the interior surface of the guide tube. The first part extends away from the interior surface, and toward the exhaust inlet. The second part has a first end that is nearer to the first part. The second part extends toward the interior surface. The second part has a second end that is apart from the interior surface. The second end of the second part of the first exhaust guide component and the second end of the second part of the second exhaust guide component are displaced along axis X along which the guide tube extends.

First claim

1 . A battery pack exhaust duct disposed within a housing of a battery pack, the battery pack exhaust duct comprising:
a guide tube that is hollow; an exhaust inlet through which an inside of the housing communicates with an inside of the guide tube; an exhaust outlet through which the inside of the guide tube communicates with an outside of the housing; and at least two exhaust guide components arranged within the guide tube, wherein the at least two exhaust guide components include a first exhaust guide component and a second exhaust guide component, the first exhaust guide component is disposed on a first interior surface of two interior surfaces of the guide tube that are opposite each other, the second exhaust guide component is disposed on a second interior surface of the two interior surfaces of the guide tube, each of the first and second exhaust guide components has a first part and a second part, the first part has a first end that is disposed near to a corresponding one interior surface among the first and second interior surfaces, and the first part extends in a direction away from the corresponding one interior surface and extends toward the exhaust inlet, the second part has a first end that is disposed near to the first part, the second part extends in a direction approaching the corresponding one interior surface near which the first part exists, and the second part has a second end that is apart from the corresponding one interior surface, and the second end of the second part of the first exhaust guide component and the second end of the second part of the second exhaust guide component are displaced along an axis along which the guide tube extends.

2 . The battery pack exhaust duct according to claim 1 , wherein the second parts extend toward the exhaust inlet.

3 . The battery pack exhaust duct according to claim 1 , wherein when the first exhaust guide component and the second exhaust guide component are seen along an axis along which the guide tube extends, the second part of the first exhaust guide component at least partly overlaps the first part of the second exhaust guide component.

4 . The battery pack exhaust duct according to claim 1 , wherein when the first exhaust guide component and the second exhaust guide component are seen along the axis that is perpendicular to the axis along which the guide tube extends, the second part of the first exhaust guide component at least partly overlaps the first part of the second exhaust guide component.

5 . The battery pack exhaust duct according to claim 1 , wherein the exhaust guide components each have a L-shape.

6 . A battery pack comprising:
a battery that includes a valve that opens to discharge gas if a pressure increases within the battery; the battery pack exhaust duct according to claim 1 ; and a housing that houses the battery and the battery pack exhaust duct.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• GONDOH Hiroaki

Classifications

• H01M50/35 Primary

  Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages · CPC title

• H01M50/209

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

• H01M50/367

  Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M50/383

  Flame arresting or ignition-preventing means · CPC title