Lead-acid battery

Patent metadata

Field	Value
Publication number	US-2017062875-A1
Application number	US-201615242817-A
Country	US
Kind code	A1
Filing date	Aug 22, 2016
Priority date	Sep 1, 2015
Publication date	Mar 2, 2017
Grant date	—

Abstract

A lead-acid battery disclosed in the present specification includes: a container storing an element formed of a plurality of electrodes and an electrolyte solution; and a lid member fixed to an upper portion of the container. The lid member includes: a middle lid having a lid plate configured to seal an opening of the container; a cylindrical exhaust sleeve formed in a plateau portion formed on the lid plate in a penetrating manner and configured to discharge a gas generated in the container therethrough; and a recessed portion disposed adjacently to the exhaust sleeve and formed on a lower surface of the plateau portion in an upwardly recessed manner. The exhaust sleeve has a communication hole which communicates with the inside of the recessed portion and the inside of the exhaust sleeve.

First claim

What is claimed is:

1 . A lead-acid battery comprising:
a container storing a plurality of electrodes and an electrolyte solution; and a lid member fixed to an upper portion of the container, wherein the lid member includes:
a lid plate configured to seal an opening of the container;
a cylindrical exhaust sleeve formed in the lid plate in a penetrating manner and configured to discharge a gas generated in the container therethrough; and
a recessed portion disposed adjacently to the exhaust sleeve and formed on an inner surface of the lid plate in an outwardly recessed manner, and
the exhaust sleeve has a communication hole which communicates with the inside of the recessed portion and the inside of the exhaust sleeve.

2 . The lead-acid battery according to claim 1 , wherein
the exhaust sleeve has a projecting portion which projects toward the inside of the exhaust sleeve.

3 . The lead-acid battery according to claim 2 , wherein
a wall portion of the exhaust sleeve having the communication hole extends downward toward the inside of the container from a lower surface of the projecting portion.

4 . The lead-acid battery according to claim 3 , wherein
the wall portion having the communication hole is disposed more on a proximal part than on a projecting end of the projecting portion.

5 . The lead-acid battery according to claim 1 , wherein
on an opposedly-facing wall portion of the exhaust sleeve which opposedly faces the wall portion having the communication hole, the projecting portion is formed at a position above the communication hole.

6 . The lead-acid battery according to claim 1 , wherein
a return flow passage which allows a solution droplet to return to the inside of the container is formed on an upper surface of the lid plate, and the recessed portion is formed at a position which is other than a position where the return flow passage is formed as viewed in an axial direction of the exhaust sleeve.

7 . The lead-acid battery according to claim 1 , wherein
an inner surface of the lid plate has a first surface region and a second surface region disposed adjacently to the first surface region at a position disposed adjacently to the exhaust sleeve, and the first surface region is recessed outward with respect to the second surface region thus forming the recessed portion.

8 . The lead-acid battery according to claim 7 , wherein
the communication hole formed in the exhaust sleeve is a slit extending to the first surface region.

9 . The lead-acid battery according to claim 1 , wherein
the communication hole formed in the exhaust sleeve extends into a cavity defined by the recessed portion.

Assignees

• Gs Yuasa Int Ltd

Inventors

• Funo Shinya
• Saito Kazuma

Classifications

• H01M50/147

  Lids or covers · CPC title

• H01M50/367

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

• H01M50/636

  Closing or sealing filling ports, e.g. using lids · CPC title

• H01M2/1252

  Electricity · mapped topic

• H01M10/12 Primary

  Construction or manufacture · CPC title