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Lead storage battery partition plate, preparation method and lead storage battery

A lead-acid battery and separator technology is applied in the fields of lead-acid battery separators, lead-acid battery production and preparation, and can solve the problems of low wet elasticity of separators and decline of battery capacity, and achieves reduction of electrolyte stratification, improvement of wet elasticity, Alleviate the effect of poor assembly pressure retention

Active Publication Date: 2018-03-06
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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  • Lead storage battery partition plate, preparation method and lead storage battery
  • Lead storage battery partition plate, preparation method and lead storage battery
  • Lead storage battery partition plate, preparation method and lead storage battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0041] 1) Dissolving 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 500mL of the above polyurethane solution, fully stir to disperse, and soak for 30min;

[0043] 3) rapid filtration and separation of glass fibers;

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

[0045] Specific amounts of substances in each embodiment are shown in Table 1.

[0046] Table 1

[0047]

[0048]

Embodiment 6

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

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

[0052] 2) mixing the modified glass fiber with the ordinary glass fiber in proportion;

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

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

[0055] 5) The wet separator is dehydrated at a temperature of 200° C., and the lead battery separator is obtained after drying.

[0056] The prepared lead-acid battery separator was observed with a scanning electron microscope, and compared with the separator prepared using only ordinary glass fibers, the results were as follows: figure 1 shown. figure 1 A is ordinary pure glass fiber separator, figure 1 B is the separator prepared in the experiment. Depend on ...

Embodiment 7

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

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

[0060] 2) mixing the modified glass fiber with the ordinary glass fiber in proportion;

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

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

[0063] 5) The wet separator is dehydrated at a temperature of 200° C., and the lead battery separator is obtained after drying.

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Abstract

The invention discloses a lead storage battery partition plate, a preparation method and a lead storage battery. The lead storage battery partition plate is prepared from modified glass fibers and common glass fibers in a mixing manner based on a proportion, wherein the modified glass fibers are obtained by coating the common glass fibers with thermoplastic polyurethane, and the modified glass fibers account for 1-15mass%. The lead storage battery partition plate is prepared from the modified glass fibers and the common glass fibers in a mixing manner based on a proportion; thermoplastic polyurethane and the glass fibers form a network structure easily in the drying process, so that the tortuosity factor of the partition plate porous structure is improved, the sulfuric acid electrolyte adsorption capability of the partition plate can be improved to a certain degree, and an electrolyte layering phenomena caused by the internal gravity effect of the partition plate can be lowered; and inaddition, a polymer has certain water absorption and expansion performance, so that the wet-state elasticity of the partition plate can be improved after the battery is added with acid, so that the problem of poor assembling pressure holding ability of the battery can be relieved.

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 that is placed between the positive and negative electrodes of the lead-acid battery to keep the positive and negative electrodes in a state of isolation and avoid short-circuiting of the lead-acid battery. At the same time, the electrolyte ions that participate in the electrode reaction are allowed to pass through during the charging and discharging process of the lead-acid battery. For sealed maintenance-free lead-acid batteries, the separator must also ensure that the oxygen precipitated from the positive electrode reaches the negative electrode through the separator to complete the oxygen recombination reaction. [0003] In a conventional flooded lead-acid battery, the...

Claims

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Application Information

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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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