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Battery separator with controlled pore structure

A technology of separators and batteries, applied in structural parts, battery pack parts, electrical components, etc., can solve problems such as reducing battery performance, increasing cost, and reducing performance

Active Publication Date: 2020-07-28
HOLLINGSWORTH VOSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Light acid above limits plate activation, promotes corrosion and reduces performance, while high acid concentration at the bottom produces severe sulfation and large crystals, reducing battery performance
[0006] Unfortunately, design or material changes that improve some performance attributes may negatively affect other performance attributes and / or increase cost

Method used

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  • Battery separator with controlled pore structure
  • Battery separator with controlled pore structure
  • Battery separator with controlled pore structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0137] Example 1. Spacer composition

[0138] In each of the spacers described below, one or more of the following fibers were employed:

[0139]

Embodiment 1A

[0140] Example 1.A. Reference Spacer 1: 60% Fiber 1 / 40% Fiber 3

[0141] Fiber 1 was added to a hydropulper containing water and sulfuric acid to form a fiber dispersion slurry. Keep the pH at 2.7. The fiber slurry is stored in boxes (tanks) under agitation. The same process was repeated for Fiber 3, and the fiber slurry thus prepared was stored in a second box under agitation. Two boxes supply stock to the headbox of the paper machine (Fourdrinier). The flow rates of the respective slurries were set such that the dry weight of the fibers corresponded to 60% Fiber 1 and 40% Fiber 3 . The fiber slurry is mixed within the headbox, resulting in a homogeneous fiber slurry in contact with the web in the forming zone. The slurry is then dewatered using vacuum. The separator is then dried using a steam heated drying oven. The spacers are collected as sheets at the other end of the machine.

Embodiment 1B

[0142] Example 1.B. Reference Spacer 2: 89% Fiber 2 / 11% Fiber 4

[0143] Using a procedure similar to Example 1.A, separate head boxes were prepared using Fiber 2 and Fiber 4 at a weight ratio of 89% Fiber 2 to 11% Fiber 4 . This box supplies the stock to the headbox of the paper machine (Fourdrinier) and makes sheets in the same manner as in Example 1.A.

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PUM

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Abstract

Disclosed are battery separators comprising glass fibers and having basis weight (gsm), specific surface area (m) satisfying the equations disclosed herein 2 / g), density (gsm / mm) and average pore size (μm), provided that the specific surface area is less than 1.5m 2 / g, or the density is greater than 180 gsm / mm. Batteries including the battery separators and methods of making the separators are also disclosed.

Description

Background technique [0001] Batteries are commonly used as energy sources. Typically, a battery includes a negative electrode and a positive electrode. Negative and positive electrodes are typically disposed in the electrolytic medium. During battery discharge, a chemical reaction occurs in which the active positive electrode material is reduced and the active negative electrode material is oxidized. During the reaction, electrons flow through the load from the negative electrode to the positive electrode, and ions in the electrolytic medium flow between the electrodes. To prevent 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. [0002] One type of battery is a lead-acid battery. In lead-acid batteries, lead is usually the active negative electrode material and lead dioxide is usually the active positive electrode material. (In lea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/16H01M50/437H01M50/489H01M50/491H01M50/494
CPCH01M10/12Y02E60/10H01M50/44Y02P70/50H01M50/437H01M50/489H01M50/491H01M50/494
Inventor 兰德尔·B·凯斯勒马克西姆·西林约翰·A·韦茨
Owner HOLLINGSWORTH VOSE