Polyolefinic plate wraps, improved wrapped plates, improved lead acid batteries, and related methods

Patent metadata

Field	Value
Publication number	US-2016344036-A1
Application number	US-201615159925-A
Country	US
Kind code	A1
Filing date	May 20, 2016
Priority date	May 21, 2015
Publication date	Nov 24, 2016
Grant date	—

Abstract

Disclosed herein are novel or improved porous polyolefinic plate wrap materials for batteries, improved wrapped plates, improved systems, improved batteries or cells, non-PVC plate wraps, non-PVC wrapped plates, non-PVC batteries, and/or methods of production and/or use thereof. The use of such polyolefinic wraps may simplify the construction of batteries, produce more efficient or robust batteries, and/or the like.

First claim

What is claimed is:

1 . A lead acid battery plate wrap comprising a porous polyolefin membrane or sheet.

2 . The plate wrap of claim 1 , wherein substantially no polyvinylchloride is present.

3 . The plate wrap of claim 1 , wherein the polyolefin is polyethylene.

4 . The plate wrap of claim 1 , comprising a silica filler.

5 . The plate wrap of claim 4 , wherein the weight ratio of polyolefin to silica is from about 1:1.8 to 1:3.5.

6 . The plate wrap of claim 1 , having a backweb thickness from about 0.15 to 0.45 mm.

7 . The plate wrap of claim 1 , wherein an electrode facing side of the wrap is smooth, ribbed, embossed, shaped, or corrugated, and an outward facing side of the wrap is smooth, ribbed, embossed, shaped, or corrugated.

8 . The plate wrap of claim 1 , comprising transverse ribs on at least one side.

9 . The plate wrap of claims 1 , comprising a heat-meltable polymer along at least vertical edges of the wrap, wherein said polymer comprises a low molecular weight polymer.

10 . The plate wrap of claim 1 , comprising a coating, an oil, a surfactant, an alcohol, a heat sealing additive, an antioxidant, a water-loss inhibitor, or other additive or agent.

11 . An electrochemical element, wrapped plate, or cell comprising
a) a first electrode; b) the plate wrap of claim 1 , wherein the plate wrap surrounds the first electrode.

12 . The element of claim 11 , comprising at least one slyver mat or glass mat between the first electrode and the plate wrap.

13 . The element of claim 12 , comprising a slyver mat between the glass mat and the first electrode.

14 . The element of claim 11 , wherein the plate wrap is sealed along a vertical edge.

15 . The element of claim 11 , wherein the plate wrap is sealed along a bottom horizontal edge.

16 . The element of claim 11 , wherein the plate wrap is affixed to a boot, mud rest or casing at a bottom horizontal edge.

17 . The element of claim 11 , wherein the element is part of a 5 point system, 4 point system, or 3 point system.

18 . A lead acid battery, comprising:
a) the electrochemical element of claim 11 ; b) a second electrode of opposite polarity to the first electrode; and c) electrolyte.

19 . The battery of claim 18 , comprising a separator between the electrochemical element and the second electrode, wherein the separator does not surround the first electrode.

20 . The battery of claim 19 , wherein the separator comprises microporous polyethylene.

21 . The battery of claim 18 , which does not contain a separator between the electrochemical element and the second electrode.

22 . The battery of claim 21 , comprising a spacer between the electrochemical element and the second electrode.

23 . The battery of claim 22 , wherein the spacer comprises a shaped, ribbed, embossed, or corrugated porous member or material.

Assignees

• Daramic Llc

Inventors

• Whear J Kevin
• Chambers Jeffrey K
• Saffel Robert W
• Miller Eric H

Classifications

• H01M10/12 Primary

  Construction or manufacture · CPC title

• H01M50/417

  Polyolefins · CPC title

• H01M4/14

  Electrodes for lead-acid accumulators · CPC title

• H01M2/1653

  Electricity · mapped topic

• H01M2/18

  Electricity · mapped topic