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Production of nickel-hydrogen diaphragm and products thereof

A technology of battery separator and nickel-metal hydride battery, which is applied in the field of preparation of nickel-metal hydride battery separator, can solve the problems of inability to implement industrially, damage to strength, shrinkage of separator base cloth, etc., and achieve easy industrial implementation, easy process control and reliable product performance. Effect

Inactive Publication Date: 2008-01-16
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the aforementioned U.S. Patent US6355375, Japanese Patent JP2001011761 and Japanese Patent JP2000277085 all mentioned the sulfonation treatment of the battery diaphragm, they did not clearly provide specific sulfonation process, such as sulfonation agent, sulfonation temperature, sulfonation time, etc., cannot be implemented industrially
The sulfonation temperature and time are just the important process parameters in the sulfonation process. If the sulfonation temperature is too low or the time is insufficient, the sulfonation effect will not be achieved. If the sulfonation temperature is too high or the time is too long, the diaphragm base fabric will shrink severely. The strength is destroyed, and the hydrophilicity decreases
In the Japanese patent JP2001222989 and Japanese patent JP2002141043, although the sulfonating agent and the sulfonation temperature are given, the sulfonation time is also not given, and the specific applicable fiber raw materials and post-sulfonation treatment are not given. methods, etc., while the given sulfonation temperature range is wide, and the quality control of industrial applications is inconvenient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) ES fiber with 52% low-density polyethylene content is used to produce non-woven fabric base fabric for diaphragm.

[0028] (2) Sulfonation treatment: select 98% concentrated sulfuric acid as the sulfonating agent, immerse the base cloth in the high-temperature concentrated sulfuric acid treatment solution for sulfonation treatment, and apply a tension of 30N / 50mm; the sulfonation process conditions are: The sulfonation temperature is 130°C, and the sulfonation time is 78s.

[0029] (3) Post-sulfonation treatment: After sulfonation, the cloth is washed once with 70% sulfuric acid solution, once with 30% sulfuric acid solution, and washed twice with purified water. Each washing time is 3 minutes, and the cloth is dried at 90°C for 50 minutes. It can be obtained after ironing and smoothing at 85℃.

[0030] According to the Japanese nickel-hydrogen battery separator test standard, the performance of the product of Test Example 1 is as follows:

[0031] Gram weight g / m 2 ...

Embodiment 2

[0039] (1) Same as Example 1.

[0040] (2) Sulfonation treatment: Using 93% concentrated sulfuric acid as the sulfonating agent, immerse the base cloth in the high-temperature concentrated sulfuric acid treatment solution for sulfonation treatment, and apply a tension of 26N / 50mm; the sulfonation process conditions are: The sulfonation temperature is 144°C, and the sulfonation time is 10.5s.

[0041] (3) Post-sulfonation treatment: After sulfonation, the cloth is washed once with 65% sulfuric acid solution, once with 25% sulfuric acid solution, and twice with purified water. Each washing time is 5 minutes; after washing, it is dried at 80°C for 70 minutes , It can be obtained by ironing at 80℃.

[0042] According to the Japanese nickel-hydrogen battery separator test standard, the performance of the product of test example 2 is as follows

[0043] Gram weight g / m 2 65

[0044] Tensile strength (longitudinal) N / 50mm 220

[0045] Liquid suction speed mm / 30min 89

[00...

Embodiment 3

[0051] (1) Same as Example 1.

[0052] (2) Sulfonation treatment: choose 95% concentrated sulfuric acid as the sulfonating agent, immerse the base cloth in the high-temperature concentrated sulfuric acid treatment solution for sulfonation treatment, and apply a tension of 10N / 50mm; the sulfonation process conditions are: The sulfonation temperature is 142℃, and the sulfonation time is 12s.

[0053] (3) Post-sulfonation treatment: After sulfonation, the cloth is washed once with 50% sulfuric acid solution, once with 20% sulfuric acid solution, and twice with purified water. The washing time is 4 minutes, and the cloth is dried at 85°C for 1 hour after washing. , It can be obtained by ironing at 90℃.

[0054] According to the Japanese nickel-hydrogen battery separator test standard, the performance of the product of Test Example 3 is as follows:

[0055] Gram weight g / m 2 70

[0056] Tensile strength (longitudinal) N / 50mm 330

[0057] Liquid suction speed mm / 30min 90 ...

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Abstract

The process for preparation of Ni-MH battery separator includes following steps: ú¿1ú® polyolefine Fiber made of low density polyethylene is used to make battery separator base fabric; (2) the battery separator base fabric is treated with sulphonation that is: select 93-98% oil of vitriol as sulphonation agent, 129-144 Deg C. sulphonation temperature, 10-80 S sulphonation time; meantime apply 0-30 N / 50mm tension on the battery separator base fabric;(3) 50-70% vitriol and 20-30% vitriol are separately used to wash it one time; pure water is used to wash it two times; then under 80í¬90 Deg C. and for 50-70 min , make it drying.

Description

Technical field [0001] The present invention relates to battery manufacturing technology, in particular to a method for preparing a nickel-hydrogen battery separator and its product technology. The international patent classification number is proposed to be Int.Cl 7 H01M 2 / 14. Background technique [0002] As people pay more attention to environmental protection, nickel-hydrogen battery as a pollution-free "green battery" has attracted people's attention. In particular, due to the pollution of fuel-fueled vehicles and the constraints of petroleum resources, high-performance power nickel-hydrogen batteries for electric vehicles have become a hot spot in battery research and development. [0003] The battery separator is an inorganic or organic membrane that separates the positive and negative electrodes of the battery to prevent direct contact between the positive and negative poles and short-circuit. Among the various components of the battery, the diaphragm undoubtedly plays a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/14H01M50/403H01M50/417H01M50/44
CPCY02E60/12Y02E60/10
Inventor 程博闻焦晓宁杨文娟任元林刘亚李建耿鸣明
Owner TIANJIN POLYTECHNIC UNIV
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