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Colloidal separator for lead-acid battery and manufacturing method thereof

A technology for lead-acid batteries and manufacturing methods, applied to battery components, circuits, electrical components, etc., can solve problems such as uneven colloidal electrolyte perfusion, achieve the effects of preventing delamination, improving diffusion, and improving low-temperature performance

Active Publication Date: 2015-10-14
CHAOWEI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a colloidal separator for a lead-acid battery and a method for making the colloidal separator for a lead-acid battery. After adding sulfuric acid electrolyte, the colloidal separator forms a gel-like substance with the functionalized modified superabsorbent resin to play the role of colloidal electrolyte, thereby solving the problem of uneven perfusion of colloidal electrolyte in the production process of lead-acid batteries

Method used

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Examples

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Effect test

Embodiment Construction

[0015] Example 1 of a colloidal separator for a lead-acid battery of the present invention is coated with a polymer colloid layer on the surface of the AGM separator.

[0016] The polymer colloid layer is made of linear high molecular weight product polyacrylamide. Polyacrylamide (referred to as PAM) is a water-soluble linear polymer polymerized by free radicals from acrylamide (abbreviated as AM). It is insoluble in most organic solvents and has good flocculation properties, which can reduce liquid The friction resistance between them can be divided into four types: non-ionic, anionic, cationic and amphoteric according to the ionic characteristics. When PAM is used for flocculation, it is related to the surface properties of the flocculated species, especially the kinetic potential, viscosity, turbidity and pH value of the suspension. The dynamic potential of the particle surface is the reason for particle inhibition. Adding PAM with opposite surface charge, It can reduce th...

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Abstract

The invention discloses a lead-acid battery colloidal separator and a manufacturing method of the lead-acid battery colloidal separator. The surface of the AGM separator is coated with a polymer colloid layer, and an anionic polyacrylamide water-soluble polymer is mixed with water. Mix according to the ratio of 5 to 10:1 by weight, and carry out gelation treatment to make polymer colloid, and coat the polymer colloid on the surface of the AGM separator to form a polymer colloid layer, the thickness of the polymer colloid layer is 0.01 ~1mm, and then dried to obtain a colloidal separator for lead-acid batteries. The colloidal separator is made of functionalized modified superabsorbent polymer and ultra-fine glass fiber material. After adding sulfuric acid electrolyte, the colloidal separator forms a gel-like substance with the functionalized modified superabsorbent resin to act as a colloidal electrolyte. Therefore, the problem of uneven perfusion of the colloidal electrolyte in the production process of the lead-acid battery is solved.

Description

technical field [0001] The invention belongs to the technical field of lead-acid storage batteries, and relates to a lead-acid storage battery colloid separator and a manufacturing method of the lead-acid storage battery colloid separator. Background technique [0002] With the rapid development of the electric bicycle industry, the number of lead-acid batteries used in electric bicycles is also increasing. The lead-acid battery for electric mopeds is composed of positive plate, negative plate, separator and electrolyte. The separator is composed of ultra-fine glass fiber, which mainly plays the role of preventing short circuit of positive and negative plates and storing sulfuric acid electrolyte. At present, lead-acid batteries for electric mopeds generally use colloidal sulfuric acid electrolytes. The main component of colloidal sulfuric acid electrolyte is fumed silica, which forms a gel-like substance with the electrolyte composed of sulfuric acid and water. The gel el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/14H01M2/16H01M50/403H01M50/417H01M50/437H01M50/44
CPCH01M50/449H01M50/403Y02E60/10
Inventor 周明明张绍辉张凯马洪涛
Owner CHAOWEI POWER CO LTD
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