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Cell separator manufacturing method, cell separator and alkaline storage battery using said separator

A manufacturing method and storage battery technology, which are applied in the manufacture of battery separators, battery separators and alkaline storage batteries using such separators, can solve the problems of increased battery impedance and difficulty in uniform sulfonation as a whole, and achieve The effect of increasing strength

Inactive Publication Date: 2002-11-20
松本 功
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

but only with SO 3 The gas reaction will make the sulfonation only locally on the surface of the fiber, it is difficult to make the whole uniform sulfonation, but it will increase the internal impedance of the battery

Method used

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  • Cell separator manufacturing method, cell separator and alkaline storage battery using said separator
  • Cell separator manufacturing method, cell separator and alkaline storage battery using said separator
  • Cell separator manufacturing method, cell separator and alkaline storage battery using said separator

Examples

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Effect test

manufacture example 1

[0068] A slurry containing commercially available spherical nickel hydroxide powder with an average particle size of about 15 μm, a small amount of fluororesin powder, and conductive substance powder is coated on a nickel foil with a thickness of 30 μm having numerous bumps and concaves by a known method. , was dried by a known method and then pressed to obtain a positive electrode with a thickness of 400 μm. By cutting, a thin and long positive electrode with a width of 40mm, a length of 170mm and a theoretical capacity of about 1700mAh was produced.

manufacture example 2

[0070] Except using common foamed metal with a thickness of 0.7 mm as the positive electrode and cutting it into a width of 40 mm and a length of 85 mm, the positive electrode was made in the same way as in the positive electrode manufacturing example 1.

[0071] (Negative electrode production example 1)

[0072] Contain commercially available AB with an average particle size of about 10 μm 5 An aqueous solution slurry of a hydrogen storage alloy was applied by a known method to a 30 μm thick nickel foil having numerous unevennesses, dried by a known method and then pressed to obtain a negative electrode with a thickness of 240 μm. Then it is cut into a long-sized electrode with a width of 40 mm and a length of 230 mm to make a negative electrode with a theoretical capacity of about 2400 mAh.

[0073] (Negative electrode production example 2)

[0074] Except for using a common slurry-type hydrogen storage alloy negative electrode with a thickness of 0.35 mm and cutting it in...

Embodiment 1

[0076] image 3 The microfibers shown in which polyolefin fibers and polyethylene fibers are divided into 8 strands are integrated bundled fibers, that is, polyolefin microfibers and polyethylene microfibers are alternately arranged in the circumferential direction of the cross section of the bundled fibers. Fibers (diameter 10 μm) are joined with low-melting polyethylene at the intersections, and the average thickness is 100 μm, the porosity is 60%, and the tensile strength is 6.2 kg / cm 2 of non-woven fabrics. By impacting the non-woven fabric with a high-speed water flow, each ultra-fine fiber is divided at the unjoined part of the bundled fibers constituting the non-woven fabric, and then passed between hot rolls at about 80°C to make the thickness of the non-woven fabric Adjust to 70 ~ 80μm, get figure 1 The final hoop-shaped nonwoven is shown. Then the final hoop-shaped non-woven fabric is placed on the Figure 5 Expose for about 10 seconds in the atmosphere of a wate...

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Abstract

The invention provides a method for manufacturing separators for batteries. At least the vicinity of the fiber surface of the non-woven fabric is sulfonated, and the sulfonation process includes the pretreatment of exposing the non-woven fabric to a water vapor stream with a nearly saturated humidity. process and the process of immediately exposing the nonwoven fabric subjected to the pretreatment process to an air stream containing SO3 gas, and the nonwoven fabric composed of fibers mainly made of polyolefin resin characterized by the above-mentioned sulfonation process is A method for manufacturing a battery separator based on a base fabric, a separator manufactured by the manufacturing method, and a battery using the separator.

Description

technical field [0001] The present invention relates to improvement of separators for alkaline storage batteries and high output of alkaline storage batteries using the improved separators. Background technique [0002] The nickel-cadmium storage battery (Ni / Cd battery), which was invented in Sweden in the early 20th century, was able to be sealed in the 1940s. Since around 1970, with the use of small secondary power supplies in household appliances, communications, office machinery, With the expansion of other uses, nickel-cadmium batteries, as a secondary battery representing alkaline batteries, have developed extremely rapidly. However, around 1990, the newly developed nickel-metal hydride storage battery (Ni / MH battery) which replaced the cadmium electrode with a hydrogen storage alloy and the lithium secondary battery developed later, as a new power source for mobile electronic devices, have recently been declining in terms of output and output value. Exceeded Ni / Cd ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/00D04H1/4291D04H1/4382D04H1/544D06M11/05D06M11/55H01M10/24H01M10/28H01M10/30H01M10/34H01M50/403H01M50/417H01M50/489H01M50/491H01M50/494
CPCH01M10/281H01M10/30H01M10/345H01M2300/0014Y02E60/10Y02P70/50H01M50/56H01M50/403H01M50/44H01M50/417H01M50/491H01M50/489H01M50/494
Inventor 松本功
Owner 松本 功
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