Vapor pressure barriers for lead acid batteries for improved water loss performance, separators, systems, and methods of manufacture and use thereof

Patent metadata

Field	Value
Publication number	US-2024145860-A1
Application number	US-202418408058-A
Country	US
Kind code	A1
Filing date	Jan 9, 2024
Priority date	Feb 26, 2015
Publication date	May 2, 2024
Grant date	—

Abstract

New or improved lead acid batteries with vapor pressure barriers and/or improved battery separators, as well as systems, vehicles, and/or methods of manufacture and/or use thereof are disclosed herein. In at least select embodiments, the instant disclosure provides new or improved lead acid batteries with a vapor pressure barrier. In at least select embodiments, the instant disclosure provides new or improved lead acid battery vapor pressure barriers along with new or improved battery separators, and/or methods of manufacture and/or use thereof. In at least select embodiments, the instant disclosure provides a new or improved lead acid battery with a vapor pressure barrier that reduces the water loss from the battery. In at least select embodiments, a method of reducing the water loss of a lead acid battery may include providing a vapor pressure barrier, such as a layer of oil, inside the lead acid battery along with an improved battery separator.

First claim

1 - 15 . (canceled)

16 . A flooded lead acid battery that exhibits outgassing of H 2 and O 2 gases, the lead acid battery comprising a battery case and a vapor pressure barrier comprising a catalyst.

17 . The flooded lead acid battery of claim 16 , wherein the vapor pressure barrier comprises a catalyst applied to a nonwoven material.

18 . The flooded lead acid battery of claim 16 , wherein the vapor pressure barrier comprises a catalyst applied to a porous membrane.

19 . The flooded lead acid battery of claim 16 , wherein the vapor pressure barrier comprises a catalyst applied to a membrane or fibrous structure.

20 . The flooded lead acid battery of claim 16 , wherein the vapor pressure barrier comprises a catalyst applied to the battery case.

21 . The flooded lead acid battery of claim 16 , wherein the catalyst is applied to a top or in venting structures of the flooded lead acid battery.

22 . The flooded lead acid battery of claim 16 , wherein the catalyst is one that promotes O 2 /H 2 recombination.

23 . The flooded lead acid battery of claim 16 , wherein the catalyst is one that brings about the addition of atomic oxygen to atomic hydrogen to achieve condensation of liquid water.

24 . The flooded lead acid battery of claim 16 , wherein the catalyst is one that reacts efficiently to form water in low-pH oxidative environments.

25 . The flooded lead acid battery of claim 17 , wherein the vapor pressure barrier is attached to the battery lid.

26 . The flooded lead acid battery of claim 25 , wherein the vapor pressure barrier is insert molded into the battery lid or around a periphery of vent orifices on a bottom of the battery lid.

27 . The flooded lead acid battery of claim 18 , wherein the vapor pressure barrier is attached to the battery lid.

28 . The flooded lead acid battery of claim 27 , wherein the vapor pressure barrier is insert molded into the battery lid or around a periphery of vent orifices on a bottom of the battery lid.

29 . The flooded lead acid battery of claim 19 , wherein the vapor pressure barrier is attached to the battery lid.

30 . The flooded lead acid battery of claim 29 , wherein the vapor pressure barrier is insert molded into the battery lid or around a periphery of vent orifices on a bottom of the battery lid.

31 . The flooded lead acid battery of claim 30 , wherein the vapor pressure barrier further comprises oil.

32 . The flooded lead acid battery of claim 30 , wherein the catalyst is platinum.

Assignees

• Daramic Llc

Inventors

• Roberts Margaret R
• Chambers Jeffrey K
• Perry James
• Whear J Kevin

Classifications

• H01M50/383 Primary

  Flame arresting or ignition-preventing means · CPC title

• H01M10/12 Primary

  Construction or manufacture · CPC title

• H01M2220/20

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

• Y02E60/10

  Energy storage using batteries · CPC title

• B60L50/72

  Constructional details of fuel cells specially adapted for electric vehicles · CPC title