A lead storage battery separator, preparation method and lead storage battery

A technology for lead-acid batteries and separators, which is applied in the fields of lead-acid battery separators and lead-acid battery production and preparation, can solve problems such as low wet elasticity of separators, battery capacity decline, etc., reduce electrolyte stratification, improve wet elasticity, The effect of increasing the twist factor

Active Publication Date: 2020-08-11
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The present invention aims at the problems of low wet elasticity of the separator and rapid battery capacity decline in the prior art, and provides a lead storage battery separator with good wet elasticity, which can delay the capacity decline of the lead storage battery

Method used

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  • A lead storage battery separator, preparation method and lead storage battery
  • A lead storage battery separator, preparation method and lead storage battery
  • A lead storage battery separator, preparation method and lead storage battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0041] 1) Dissolve thermoplastic polyurethane (9180AL, Shanghai Yitan New Material Co., Ltd.) in a solvent to obtain a polyurethane solution;

[0042] 2) Add clean (purified) ordinary glass fiber (29°SR, Shenyang Jiuqing Dongxiang Glass Products Co., Ltd.) into 500 mL of the above polyurethane solution, stir and disperse and immerse for 30 minutes;

[0043] 3) Quickly filter and separate glass fiber;

[0044] 4) After using a small amount of dilute solvent to remove excess polyurethane solution on the surface, the modified glass fiber is obtained by drying treatment, and fiber accumulation should be avoided during the drying process.

[0045] The dosages of the substances in the specific examples are shown in Table 1.

[0046] Table 1

[0047]

[0048]

Embodiment 6

[0050] When the mass ratio of the modified glass fiber is 1%, the separator is prepared.

[0051] 1) Weigh 2g of the modified glass fiber prepared in Example 1 and ordinary glass fiber, and control the weight ratio to 1:99;

[0052] 2) Mix and beat the modified glass fiber and ordinary glass fiber in proportion;

[0053] 3) Use sulfuric acid solution to adjust the slurry pH to 2.5;

[0054] 4) The slurry is bubbled and dispersed, stirred, filtered, and dehydrated to obtain a wet separator;

[0055] 5) The wet separator is placed in a temperature of 200 DEG C for dehydration and dried to obtain the lead storage battery separator.

[0056] The prepared lead-acid battery separator was observed with a scanning electron microscope and compared with a separator prepared using only ordinary glass fiber. The results are as follows figure 1 Shown. figure 1 A is ordinary pure glass fiber separator, figure 1 B is the separator prepared in the experiment. by figure 1 It can be seen from B that ther...

Embodiment 7

[0058] When the mass ratio of the modified glass fiber is 5%, the separator is prepared.

[0059] 1) Weigh 2g of the modified glass fiber prepared in Example 2 and ordinary glass fiber, and control the weight ratio to 5:95;

[0060] 2) Mix and beat the modified glass fiber and ordinary glass fiber in proportion;

[0061] 3) Adjust the pH value of the slurry to 2.0;

[0062] 4) The slurry is bubbled and dispersed, stirred, filtered, and dehydrated to obtain a wet separator;

[0063] 5) The wet separator is placed in a temperature of 200 DEG C for dehydration and dried to obtain the lead storage battery separator.

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Abstract

The invention discloses a lead storage battery separator, a preparation method and a lead storage battery. A separator for a lead storage battery, which is made by mixing modified glass fibers and ordinary glass fibers in proportion, wherein the modified glass fibers are obtained by wrapping thermoplastic polyurethane on the surface of ordinary glass fibers, and the mass ratio of the modified glass fibers is 1- 15%. The lead storage battery separator of the present invention is made by mixing modified glass fiber and ordinary glass fiber in proportion. Thermoplastic polyurethane is easy to form a network structure with glass fiber in the drying process, which increases the tortuosity factor of the pore structure of the separator and can improve the separator to a certain extent. The ability of the plate to absorb sulfuric acid electrolyte reduces the electrolyte stratification phenomenon caused by gravity inside the separator. In addition, the polymer has certain water-absorbing and swelling properties, so the wet-state elasticity of the separator will be improved after adding acid to the battery, which can alleviate the problem of poor battery assembly pressure retention.

Description

Technical field [0001] The invention relates to the technical field of lead storage battery production, in particular to a lead storage battery separator, a preparation method and a lead storage battery. Background technique [0002] The AGM separator for lead-acid batteries is a porous insulating material placed between the positive and negative electrodes of the lead-acid battery to keep the positive and negative electrodes in an isolated state to avoid short-circuiting of the lead-acid battery. At the same time, the electrolyte ions participating in the electrode reaction are allowed to pass through during the charging and discharging process of the lead-acid battery. For the sealed maintenance-free lead-acid battery, the separator must ensure that the oxygen released from the positive electrode reaches the negative electrode through the separator to complete the oxygen recombination reaction. [0003] In the traditional flooded lead-acid battery, the separator only serves as an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/14H01M2/16H01M10/06H01M50/403H01M50/44H01M50/491
CPCH01M10/06H01M50/431H01M50/44H01M50/403Y02E60/10
Inventor 张峰博陈飞孔春凤郭志刚陈连强
Owner TIANNENG BATTERY GROUP
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