Lead-acid battery

Patent metadata

Field	Value
Publication number	US-2021083234-A1
Application number	US-201816954385-A
Country	US
Kind code	A1
Filing date	Dec 17, 2018
Priority date	Dec 25, 2017
Publication date	Mar 18, 2021
Grant date	—

Abstract

A lead-acid battery (100) is provided with a lid (14). A communication chamber (520) is formed inside the lid (14). The communication chamber (520) is provided with an internal flow passage forming part (432, 522) forming an internal flow passage (Q) which communicates with a vent hole (321) and is located on the other side in a first direction than the vent hole (321). At least a part of the surface of the internal flow passage forming part (432, 522) has an uneven part (T).

First claim

1 . A lead-acid battery comprising:
a container having an opening on one side in a first direction and formed with a housing chamber communicating with the opening; a positive electrode and a negative electrode housed in the housing chamber of the container; and a lid disposed so as to close the opening of the container and has a discharge port formed on an outer surface of the lid, wherein a communication chamber and an external flow passage forming part are formed inside the lid, the communication chamber is surrounded by a partition wall between the housing chamber and the communication chamber, a facing wall that faces the partition wall in the first direction, and a sidewall that connects the partition wall and the facing wall, the external flow passage forming part is adjacent to the communication chamber through the sidewall and forms an external flow passage that communicates with the discharge port of the lid, a communication hole communicating with the housing chamber is formed in the partition wall, a vent hole communicating with the external flow passage is formed in the sidewall, the communication chamber is provided with an internal flow passage forming part forming an internal flow passage, the internal flow passage communicating with the vent hole and located on the other side in the first direction than the vent hole, and at least a part of a surface of the internal flow passage forming part has an uneven part.

2 . The lead-acid battery according to claim 1 , wherein
the internal flow passage forming part includes a flow passage wall disposed at a position separated from the partition wall, at least a part of a surface of the flow passage wall has the uneven part, and a surface of the partition wall is substantially flat.

Assignees

• Gs Yuasa Int Ltd

Inventors

• Akimoto Takashi

Classifications

• H01M50/668

  Means for preventing spilling of liquid or electrolyte, e.g. when the battery is tilted or turned over · CPC title

• H01M50/392

  with means for neutralising or absorbing electrolyte; with means for preventing leakage of electrolyte through vent holes · CPC title

• H01M50/114

  specially adapted for lead-acid cells · CPC title

• H01M50/35

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

• H01M10/12 Primary

  Construction or manufacture · CPC title