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Three-zone battery separator

A battery separator and separator technology, applied in lead-acid batteries, battery pack components, circuits, etc., can solve problems such as grid corrosion and filling difficulties

Inactive Publication Date: 2018-11-27
HOLLINGSWORTH VOSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These dry areas will become progressively wetter during or after formation, but can lead to significant grid corrosion as unformed active material forces all current to flow only through the grid
Unfortunately, design or material changes that improve battery performance and / or life also often make proper filling more difficult

Method used

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  • Three-zone battery separator
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] Example 1. Formation of a 3-zone partition

[0115] combination

[0116] Composition A (fine fiber region) - 86% glass microfibers (diameter 0.8 μm to 1.4 μm, average diameter 1.1 μm), 8% PET core / PE sheath bicomponent organic fibers (1.3 DTEX, 12 mm long), 6 % chopped glass fiber (13.5 μm diameter, 1 / 2 inch long)

[0117] Composition B (coarse fiber zone) - 86% glass microfibers (diameter 8.5 μm), 8% PET core / PE sheath bicomponent organic fibers (1.3DTEX, 12 mm long), 6% chopped glass fibers (13.5 μm diameter , 1 / 2 inch long)

[0118] Fibers of composition A were added individually to a hydropulper containing water and sulfuric acid to form a fiber dispersion slurry. The pH was maintained at 2.7. The fiber slurry is stored in boxes (tanks) under agitation. The same process was repeated for composition B and the fiber slurry thus prepared was stored in a second tank under agitation. These two boxes supply stock to the pressurized headbox of the paper machine (Four...

Embodiment 2

[0121] Example 2. Measurement of diffusion rate

[0122] 1. The rate of sulfuric acid diffusion in a partition under compression can be measured using the following procedure.

[0123] 2. Device

[0124] 2.1 Methyl red diluted in sulfuric acid with a specific gravity of 1.28 (1:100 dilution)

[0125] 2.2 Glass mat separator

[0126] 2.3 Perspex block 300mm x 150mm x 50mm with drilled holes for attachment,

[0127] 2.4 Threaded Rod, Nut and Washer

[0128] 2.5 Thin shims of various thicknesses for required clearances

[0129] 2.6 Rubber gaskets or O-ring cords of various diameters used to "seal" the sample

[0130] 2.7 Assemblies for feeding acid including racks and clamps (cut bottle with catheter and pointer for feeding)

[0131] 2.8 Pyrex disc holding block assembly

[0132] 2.9 Timer / Stopwatch

[0133] 3. Sample Preparation

[0134] 3.1 Measure the gram weight of the partition, to one decimal place, in g / m 2 (W) meter.

[0135] 3.2 will be 240g / m 2 / mm compresse...

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Abstract

Disclosed is a battery separator comprising: a coarse fiber region comprising fibers, such as glass fibers, having an average diameter of 2 μm or more; a first fine fiber region comprising glass fibers having an average diameter of 2 μm or less; and comprising an average diameter of less than or equal to 2 μm A second fine fiber region of glass fibers equal to 2 μm, wherein the coarse fiber region is disposed between the first fine fiber region and the second fine fiber region, and wherein the thickness of the coarse fiber region constitutes the coarse fiber region, the first fine fiber region and 1% to 49% of the total thickness of the second fine fiber region. Such separators can be used, for example, in lead-acid batteries, where they enhance the diffusion of acid toward the interior region during filling of the battery with acid.

Description

technical field [0001] The present invention relates to batteries, battery separators and related methods. Background technique [0002] Batteries are generally used as energy sources. Typically, a battery includes a negative electrode and a positive electrode. Negative and positive electrodes are often disposed in the electrolytic medium. During battery discharge, a chemical reaction occurs in which the active positive electrode material is oxidized and the active negative electrode material is reduced. During the reaction, electrons flow from the positive electrode through the load to the negative electrode, and ions in the electrolytic medium flow between the electrodes. To prevent the direct reaction of the active positive electrode material and the active negative electrode material, the electrodes are mechanically and electrically isolated from each other by separators. [0003] One type of battery is a lead-acid battery. In lead-acid batteries, lead is usually th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/16H01M50/403H01M50/437H01M50/457H01M50/489H01M50/491H01M50/494
CPCH01M10/06D04H1/4218Y02E60/10H01M50/44D04H1/43828D04H1/43835D04H1/43838H01M50/437H01M50/457H01M50/491H01M50/489H01M50/494
Inventor 尼古拉斯·克莱门特阿克沙伊·阿希尔加德
Owner HOLLINGSWORTH VOSE