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Non-woven mat with high acid absorption and high tensile strength for storage battery and preparation method of non-woven mat

A high tensile strength, high acid absorption technology, applied in lead-acid battery electrodes, battery electrodes, battery pack parts, etc. Liquid height, good adhesion and adhesion, reduced delamination effect

Pending Publication Date: 2022-05-10
CHONGQING ZAISHENG TECH CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During charge and discharge cycles, the volume of lead or / and lead oxide usually expands and contracts, and after multiple uses, active material particles of lead or / and lead oxide may fall off, negatively affecting electrodes or electrode plates

Method used

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  • Non-woven mat with high acid absorption and high tensile strength for storage battery and preparation method of non-woven mat
  • Non-woven mat with high acid absorption and high tensile strength for storage battery and preparation method of non-woven mat

Examples

Experimental program
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preparation example Construction

[0042] The first preparation method: when the loading mode of the adhesive is that an adhesive layer is arranged between the first non-woven fiber layer and the second non-woven fiber layer, the preparation method of the non-woven mat for storage battery of the present invention comprises the following steps step:

[0043] 1) Proportioning crude fibers and superfine fibers according to the mass ratio, adopting a wet forming process or a dry forming process to prepare the first non-woven fiber layer and the second non-woven fiber layer respectively;

[0044] 2) Using an adhesive to bond the first non-woven fiber layer and the second non-woven fiber layer together.

[0045] The second preparation method: when the loading method of the adhesive is that the adhesive is uniformly soaked in the entire non-woven mat by spraying or soaking, the preparation method of the non-woven mat for storage battery of the present invention includes the following steps :

[0046] 1) Proportioning ...

Embodiment 1

[0051] A nonwoven mat for a storage battery of the present invention was produced.

[0052] Using glass fiber as raw material, the non-woven mats for storage batteries of Examples 1-5 were prepared by the aforementioned second preparation method, that is, a double-layer non-woven glass fiber mat was formed by a wet-laid papermaking process with simultaneous molding of two layers.

[0053] The mass percentages of thick fibers, superfine fibers, binders, and fillers in the nonwoven mats of Examples 1-5 are shown in Table 1, for example. Comparative examples 1-5 are single-layer non-woven glass fiber mats prepared by traditional wet-laid papermaking process. In the experimental group containing fillers, the method of adding fillers is added by prior art methods, such as adding fillers to the pulp slurry when the first non-woven fiber layer and the second non-woven fiber layer are formed, or adding fillers in the first non-woven fiber layer. After the fiber layer and the second n...

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Abstract

The invention discloses a non-woven mat with high acid absorption and high tensile strength for a storage battery and a preparation method of the non-woven mat, the non-woven mat comprises a first non-woven fiber layer and a second non-woven fiber layer, the non-woven mat further contains an adhesive, and the mass ratio of the adhesive in the non-woven mat is 0.5%-50%; fibers of the first non-woven fiber layer are composed of 75-100% of crude fibers and 0-25% of superfine fibers, and fibers of the second non-woven fiber layer are composed of 75-100% of superfine fibers and 0-25% of crude fibers; the average fiber diameter of the crude fibers is 6-15 microns; the average diameter of the superfine fibers is 0.5 to 4.5 microns; the mass ratio of the crude fibers to the superfine fibers in the non-woven mat is (0.4-7): 1; and the thickness of the non-woven pad is 0.1 to 5mm. According to the non-woven pad disclosed by the invention, the capillary liquid absorption height is improved while the tensile strength is not sacrificed, so that an electrolyte material does not leak after the non-woven pad is used in a battery for absorbing acid.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a nonwoven mat for batteries with high acid absorption and high tensile strength and a preparation method thereof. Background technique [0002] Electrodes or electrode plates commonly used in lead-acid batteries typically include a metal grid supporting lead or / and lead oxide. During charge and discharge cycles, the volume of lead or / and lead oxide usually expands and contracts, and after multiple uses, the active material particles of lead or / and lead oxide may fall off, negatively affecting the electrodes or electrode plates. In order to reduce these negative effects, coated paper can be used to reinforce the electrodes to prevent lead or / and lead oxide from falling off, and coated paper can also be used as a battery separator to prevent the plates from sticking to each other when stacked. [0003] Coated paper and battery separators are usually made of non-woven ma...

Claims

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Application Information

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IPC IPC(8): H01M50/449H01M4/14H01M4/62H01M50/403H01M50/44H01M50/491H01M50/494
CPCH01M50/449H01M50/44H01M50/403H01M50/494H01M50/491H01M4/628H01M4/14
Inventor 曾影郭茂胡州
Owner CHONGQING ZAISHENG TECH CORP