Battery separator with improved shoulders

A battery separator and flank area technology, which is applied in battery pack components, separators/films/diaphragms/spacers, circuits, etc., can solve problems such as puncture in the flank areas of the separators

Inactive Publication Date: 2004-12-29
ENTEK INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been found that many punctures still occur in the flank regions of the separator utilizing the current small rib configuration

Method used

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  • Battery separator with improved shoulders
  • Battery separator with improved shoulders
  • Battery separator with improved shoulders

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0038] Fabrication of microporous polyethylene battery separators with the following features:

[0039] Partition width: 162.56mm

[0040] Back mesh thickness: 0.15mm

[0041] Main rib:

[0042] Quantity: 20

[0043] Height: 0.48mm

[0044] Width: 0.38mm

[0045] Spacing: 6.68mm

[0046] Small ribs:

[0047] Quantity: 18 (per flank)

[0048] Height: 0.10mm

[0049] Width: 0.25mm

[0050] interval:

[0051] Upper edge: 0.57mm

[0052] Center: 0.83mm

[0053] Bottom edge: 0.17mm

[0054] Others: 3.33mm (the distance between the centers of adjacent main ribs and small ribs)

example 2

[0056] The puncture resistance of the separators having the structure described in Example 1 was tested. The method used to test puncture resistance is a modified BCI test method 3.124. The modification consisted of replacing the needle dimensions determined in the original test method by needles with cross-sectional dimensions of 0.57 mm x 0.83 mm. The reason for using a needle instead is to use a needle that more closely approximates the small grid wires. The average puncture resistance for a large number of Example 1 separators was 0.75 lbs (1.65 kg).

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Abstract

A battery separator for use in enveloping the plates of a flooded cell type lead acid battery. The separator has improved puncture resistance in the shoulder areas provided by a plurality of improved mini-ribs located therein. The mini-ribs have substantially flat upper surfaces, and the space between adjacent mini-ribs is less than about 0.0225 inch. The separator may also have a plurality of micro-ribs located on the backside.

Description

technical field [0001] The present invention relates to a battery separator for an overflow tank lead-acid battery, and more particularly to a separator having wings designed to improve puncture resistance. Background technique [0002] Separators are used in lead-acid batteries to separate the positive and negative plates. The separators are constructed of a material that is sufficiently porous so that the electrolyte of the battery remains in the pores of the material, thereby allowing an ionic current to flow between adjacent positive and negative plates, but The pores are not sufficiently numerous to allow physical contact between the plates or "treeing" of lead between adjacent plates. [0003] The most common material used in overflow tank lead-acid batteries is microporous polyethylene. Such a separator and its manufacturing method are basically disclosed in US Pat. No. 3,351,495. [0004] Typically, such separators have a plurality of "main" ribs disposed at least...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/463
CPCY02E60/12H01M2/18Y02E60/10H01M50/463
Inventor D·E·韦尔茨G·B·多比
Owner ENTEK INT
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