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Manufacturing method of composite diaphragm paper for nickel-hydrogen low-self-discharge battery

A composite diaphragm and manufacturing method technology, applied in battery pack components, separators/films/diaphragms/spacer elements, circuits, etc., can solve the difference in battery state of charge, affect battery pack performance, and poor battery experience, etc. problems, to achieve the effect of small internal resistance of the battery, blocking or inhibiting the micro-short circuit of impurities, and low preparation cost

Pending Publication Date: 2022-02-18
ZHEJIANG ZHENENG TECHN RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for a long time, due to the large self-discharge of traditional civilian Ni-MH batteries, the experience of the battery on the client side is not good. It often happens that after the battery is stored for a period of time, the battery is low-voltage or cannot be charged, which makes it unusable, especially for a certain amount. For series-parallel battery packs, batteries with inconsistent self-discharge will have a large difference in SOC after a period of storage, which will greatly affect the performance of the battery pack

Method used

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  • Manufacturing method of composite diaphragm paper for nickel-hydrogen low-self-discharge battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 of the present application provides a method for making composite separator paper for Ni-MH low self-discharge batteries:

[0027] Step 1. Select an anti-dendrite diaphragm with a pore size between 0.01 and 100 microns, a uniform pore size, and a thickness of 5 to 80 microns;

[0028] Step 2. Use a surfactant treatment method to carry out hydrophilic treatment on the selected anti-dendrite diaphragm; the surfactant is cellulose acetate, tetrabutylammonium hydroxide, polyoxyethylene-type surfactant, polyol-type surfactant, NP - At least one of 10, PEP, IGEPAL Co-530 and VICTAWET-12; the principle is as follows:

[0029] Surfactants are composed of longer-chain hydrophobic groups (-R) and hydrophilic groups. When a hydrophobic diaphragm (such as PP or PE film) is soaked in an aqueous solution containing a surfactant, the hydrophobic part of the surfactant Attached to the hydrophobic surface, while the hydrophilic groups in the surfactant (such as -OH, -COOH,...

Embodiment 2

[0034] On the basis of Example 1, Example 2 of the present application provides another method for making composite separator paper for Ni-MH low self-discharge batteries:

[0035] Step 1. Select an anti-dendrite diaphragm with a pore size between 0.01 and 100 microns, a uniform pore size, and a thickness of 5 to 80 microns;

[0036]Step 2. Use a surfactant treatment method to carry out hydrophilic treatment on the selected anti-dendrite diaphragm; the surfactant is cellulose acetate, tetrabutylammonium hydroxide, polyoxyethylene-type surfactant, polyol-type surfactant, NP - At least one of 10, PEP, IGEPAL Co-530 and VICTAWET-12;

[0037] Step 2.1, add at least one of ethanol or acetone to the water, the mass fraction of the added chemical agent is 0.1% to 5%; continue to add the mass fraction of 0.5% fatty alcohol polyoxyethylene (10) ether (AEO-10) and VICTAWET-12 with a mass fraction of 0.01%, to obtain a hydrophilic solution.

[0038] Step 2.2. Soak the anti-dendrite dia...

Embodiment 3

[0041] On the basis of Embodiment 1 to Embodiment 2, Embodiment 3 of the present application provides the application of composite separator paper for Ni-MH low self-discharge batteries in the manufacture of Ni-MH batteries:

[0042] Production of cylindrical Ni-MH 25Ah Ni-MH batteries: the positive electrode is 320g / m produced by Changsha Liyuan New Materials Co., Ltd. 2 Foamed nickel is used as the matrix material, and the spherical nickel is made of cobalt-coated spherical nickel in Kelong, Henan, C04 high-temperature spherical nickel from Jiangmen Changyou Industrial Co., Ltd. and additives (70% to 75%): (20% to 25%): (5% to 10%) ratio mixed and coated on the substrate by wet process, after drying, rolling and other processes to make the positive plate; the negative electrode alloy powder is made by wet process with Xiamen Tungsten MC01 alloy powder adding appropriate amount of additives; the diaphragm is made of Baolingsulfon The liquid-absorbing membrane and the lithium ...

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Abstract

The invention relates to a manufacturing method of composite diaphragm paper for a nickel-hydrogen low-self-discharge battery. The manufacturing method comprises the following steps: selecting an anti-dendritic crystal diaphragm of which the aperture is 0.01-100 microns, the pore size is uniform and the thickness is 5-80 microns; performing hydrophilic treatment on the selected anti-dendritic crystal diaphragm by adopting a surfactant treatment method; and bonding, rolling and compounding the anti-dendritic crystal diaphragm and the nickel-hydrogen liquid absorption film which are subjected to hydrophilic treatment by adopting CMC glue to obtain the composite diaphragm paper. The invention has the beneficial effects that the diaphragm subjected to hydrophilic treatment has good air permeability and hydrophilic liquid absorption performance; the internal resistance of the battery is small, the battery is suitable for high-power discharge, and the current consistency is better; the material also has the effect of blocking or inhibiting impurity micro short circuit between the positive electrode and the negative electrode, so that the electrode performance is more stable in storage and circulation, the self discharge between the electrodes is reduced, and the charge retention capability of the battery is improved; the anti-dendritic crystal diaphragm is used for an aqueous solution soaking process for hydrophilic treatment, is simple to operate, low in cost, safe and reliable, and improves the production efficiency.

Description

technical field [0001] The invention belongs to the field of nickel-metal hydride self-discharge batteries, and in particular relates to a method for making composite diaphragm paper for nickel-hydrogen low self-discharge batteries. Background technique [0002] Ni-MH battery is a kind of storage battery with good performance, which can be used in a wide range of fields. However, for a long time, due to the large self-discharge of traditional civilian Ni-MH batteries, the experience of the battery on the client side is not good. It often happens that after the battery is stored for a period of time, the battery is low-voltage or cannot be charged, which makes it unusable, especially for a certain amount. For battery packs connected in series and parallel, batteries with inconsistent self-discharge will have a large difference in SOC after a period of storage, which will greatly affect the performance of the battery pack. [0003] Separator paper is one of the key components...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/403H01M50/409H01M50/491
CPCH01M50/403H01M50/491H01M50/409Y02E60/10
Inventor 熊兴海马福元吴田成城
Owner ZHEJIANG ZHENENG TECHN RES INST
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