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Alkaline battery separator and alkaline primery battery

A technology for alkaline batteries and diaphragms, applied in dry batteries, battery pack components, circuits, etc., can solve problems such as short circuit, insufficient rigidity of the diaphragm, leakage of negative electrode gel, etc., to suppress area shrinkage and swelling, improve compactness, Effect of preventing internal short circuit

Active Publication Date: 2008-02-20
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Although these separators have excellent alkali resistance, compactness, high electrolyte retention, and excellent electrical properties, the so-called rigidity of these separators themselves is not enough.
The separator itself bends due to shocks caused by vibrations and drops during handling and carrying of the battery, and the anode gel leaks out
result in an internal short circuit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] Thirty-five (35) parts of polyvinyl alcohol (PVA) main fiber (manufactured by Kuraray Co., Ltd., "Vinylon: VPB033 × 2 (dissolving temperature in water is not lower than 100°C)", fineness 0.3dtex × average Fiber length 2mm), 35 parts of mercerized LBKP (unbeaten), 15 parts of organic solvent spun cellulose fibers (prepared by Lenzing Inc., "Tencel", fineness 1.7dtex * average fiber length 2mm (before beating), CSF= 100ml), 15 parts of polyvinyl alcohol (PVA) binder fibers (made by Kuraray Co., Ltd., "Vinylon Binder: VPB105-1 × 3 (dissolution temperature in water is 70°C)", fineness 1.1dtex × average A fiber length of 3 mm) was dispersed in water to prepare a slurry. Then, the slurry is passed through a short wire-rotary wire paper machine for partial papermaking of a two-layer wire machine, and then dried with a Yankee dryer to obtain a grammage of 37.8g / m 2 , Alkaline battery separator with a thickness of 0.131mm. The results are shown in Table 1.

Embodiment 2

[0107] In addition to mixing 40 parts of polyvinyl alcohol main fiber (manufactured by Kuraray Co., Ltd., "Vinylon: VPB053 × 2 (dissolving temperature in water not lower than 100°C)", fineness 0.5dtex × average fiber length 2mm), 35 parts Mercerized LBKP (CSF=600ml), 10 parts of organic solvent spun cellulose fiber (manufactured by Lenzing Inc., "Tencel", fineness 1.7dtex × average fiber length 2mm (before beating), CSF=100ml), 15 parts of polyester In addition to vinyl alcohol binder fibers (manufactured by Kuraray Co., Ltd., "Vinylon Binder: VPB105-1 × 3 (dissolution temperature in water is 70°C)", fineness 1.1dtex × average fiber length 3mm), and Same operation in embodiment 1, obtain grammage and be 38.1g / m 2 , Alkaline battery separator with a thickness of 0.132mm. The results are shown in Table 1.

Embodiment 3

[0109] In addition to mixing 30 parts of polyvinyl alcohol main fiber (manufactured by Kuraray Co., Ltd., "Vinylon: VPB033 × 2 (dissolving temperature in water not lower than 100°C)", fineness 0.3dtex × average fiber length 2mm), 45 parts Mercerized eucalyptus pulp (unbeaten), 10 parts of organic solvent spun cellulose fibers (prepared by Lenzing Inc., "Tencel", fineness 1.7dtex × average fiber length 2mm (before beating), CSF=250ml), 15 parts In addition to polyvinyl alcohol binder fibers (manufactured by Kuraray Co., Ltd., "Vinylon Binder: VPB105-1 × 3 (dissolution temperature in water is 70°C)", fineness 1.1dtex × average fiber length 3mm), carry out Same procedure as in Example 1, the grammage obtained is 38.5g / m 2 , Alkaline battery separator with a thickness of 0.129mm. The results are shown in Table 1.

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Abstract

An alkaline battery separator comprising an alkali-resistance synthetic fiber, a fibrillated organic solvent-spun cellulose fiber having a Canadian standard freeness value of 10 to 280 ml, and a mercerized pulp having a Canadian standard freeness value of not less than 550 ml is prepared. In the separator, the proportion of the alkali-resistance synthetic fiber, the proportion of the fibrillated organic solvent-spun cellulose fiber, and the proportion of the mercerized pulp relative to the total amount of the separator are respectively 25 to 62% by mass, 5 to 25% by mass, and 33 to 50% by mass, provided that the total amount of the separator is 100% by mass. The alkali-resistance synthetic fiber may comprise a polyvinyl alcohol-series fiber having an average fiber fineness of not more than 1 dtex. The alkaline battery separator may further comprise a polyvinyl alcohol-series binder in a proportion of 3 to 20% by mass relative to the total amount of the separator. The alkaline battery separator of the present invention may have a shrinkage by the of not more than 3.5% after immersing in an aqueous solution of potassium hydroxide having a concentration of 40% by mass at 80°C for 24 hours and a stiffness strength of not less than 2 N.

Description

technical field [0001] The present invention relates to a battery separator suitable for an alkaline battery, such as an alkaline manganese battery, a mercury battery, a silver oxide battery or a zinc-air battery, and an alkaline battery having the battery separator. In more detail, the present invention relates to electrolytic solutions having durability and improved performance against shrinkage caused by electrolytes such as potassium hydroxide (KOH) aqueous solutions or polar agents such as manganese dioxide (such as electrolytes used to generate electrogenic reactions). Fully maintained, reduced internal resistance that does not interfere with ion conduction) and an alkaline battery having the battery separator. Background technique [0002] In general, separators are used to separate the positive and negative active materials in alkaline primary batteries. Diaphragms require various properties such as the following: [0003] 1. Prevent internal short circuit caused b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M6/06H01M50/494
CPCY02E60/12H01M2/1633H01M6/06H01M2/1626H01M2/1613H01M50/44H01M50/446H01M50/4295H01M50/494
Inventor 原田敏充凪比佐志川井弘之西山正一
Owner KURARAY CO LTD
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