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Gel electrolyte of power lead-acid storage battery

A technology of lead-acid battery and colloidal electrolyte, which is applied in the direction of lead-acid battery, lead-acid battery construction, semi-lead battery, etc. It can solve the problems of battery heating and expansion, narrow operating temperature range, and battery capacity reduction, and achieve improved discharge performance Effect

Active Publication Date: 2010-12-08
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the role of the electrolyte is to always maintain the ion transduction effect between the positive and negative plates and participate in the electrochemical reaction. The battery electrolyte in the prior art is easy to stratify the concentration of sulfuric acid during use, which expands the differential polarization, thus ensuring the stability of the battery. The chemical impedance reduces the utilization rate of active materials, resulting in reduced battery capacity and shortened cycle life
Moreover, the temperature range of the electrolyte of the battery in the prior art is narrow, and when used under high temperature conditions, thermal runaway is prone to occur, causing the battery to heat up and expand, and the life of the battery is terminated. greatly reduce capacity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Dissolve 3g of polyethylene glycol and 12g of polyacrylamide with an appropriate amount of water, add deionized water after standing for 30min, heat up to 40°C, stir at 1000r / min for 20min, and cool to room temperature to obtain solution A. A total of 2.82kg of deionized water.

[0039] (2) Mix 2.835kg solution A and 2.82kg deionized water, shear and stir at a speed of 4000r / min and a linear speed of 15m / s for 10min, then add 50g of gas phase SiO while stirring 2 , continue to stir for 30 minutes after the addition is completed, and obtain solution B;

[0040] (3) Stir solution B at a speed of 100r / min, add 4.19kg of sulfuric acid and 25g of SnSO 4 and 80g of Na 2 SO 4 After the addition is complete, continue to stir for 90 minutes, which is worth the electrolyte.

[0041] The above electrolyte was poured into the battery (6-DZM-20), and the internal resistance of the battery was detected to be 12mΩ. The first two-hour rate capacity discharge was 136min, cycle 5...

Embodiment 2

[0043] (1) Dissolve 10% polyethylene glycol and 30g polyacrylamide with an appropriate amount of water, add deionized water after standing for 100min, heat up to 70°C, stir at 1200r / min for 10min, cool to room temperature, and obtain solution A. A total of 2.685kg of deionized water;.

[0044] (2) Mix 2.725kg solution A and 2.685kg deionized water, shear and stir at 6000r / min speed and 30m / s linear speed for 3min, then add 20g of gas phase SiO while stirring 2 , continue to stir for 10 minutes after the addition is completed, and obtain solution B;

[0045] (3) Stir solution B at a speed of 600r / min, add 4.4.35kg of sulfuric acid and 15g of SnSO 4 and 120g of Na 2 SO 4 After the addition is complete, continue to stir for 90 minutes, which is worth the electrolyte.

[0046] The above electrolyte is poured into the battery (6-DZM-20), and the internal resistance of the battery is detected to be 10mΩ. The first two-hour rate capacity discharge is 135min, cycle 50 times, capac...

Embodiment 3

[0048] (1) Dissolve 10g of polyethylene glycol and 20g of polyacrylamide with an appropriate amount of water, add deionized water after standing for 30min, heat up to 60°C, stir at 1000r / min for 20min, cool to room temperature, and obtain solution A. A total of 2.63kg of deionized water.

[0049] (2) Mix 2.66kg solution A and 2.63kg deionized water, shear and stir at a speed of 5000r / min and a linear speed of 20m / s for 20min, then add 40g of gas phase SiO while stirring 2 , continue to stir for 20 minutes after the addition is completed, and obtain solution B;

[0050] (3) Stir solution B at a speed of 1000r / min, add 4.5kg of sulfuric acid and 50g of SnSO 4 and 120g of Na 2 SO 4After the addition is complete, continue to stir for 70 minutes, which is worth the electrolyte.

[0051] The above electrolyte was poured into the battery (6-DZM-20), and the internal resistance of the battery was detected to be 11mΩ. The first two-hour rate capacity discharge was 130min, cycle 50 ...

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Abstract

The invention discloses a gel electrolyte of a power lead-acid storage battery, which comprises the following raw materials in percentage by weight: 40-46 percent of H2SO4, 0.2-0.5 percent of SiO2, 0.1-0.5 percent of SnSO4, 0.8-1.2 percent of Na2SO4, 0.01-0.15 percent of PEG (Polyethylene Glycol), 0.01-0.5 percent of PAM (Polyacrylamide) and 47-57 percent of deionized water. The invention also discloses a method for preparing the gel electrolyte of a lead-acid storage battery. The invention has lower silicon dioxide content compared with the traditional electrolyte and no larger change on gelatinous performance and thixotropy, the ohmic resistance of the storage battery prepared by the invention is about 50 percent lower than that of the storage battery made of the traditional electrolyte, and the charging performance is improved by 15 percent or so.

Description

technical field [0001] The invention relates to the technical field of lead-acid batteries, in particular to a colloidal electrolyte suitable for power lead-acid batteries. Background technique [0002] The main components of lead-acid batteries for power are: positive and negative plates, glass fiber separators, battery tanks, battery covers, electrolyte (dilute sulfuric acid), lead-out terminals, safety valves, etc. Among them, the role of the electrolyte is to always maintain the ion transduction effect between the positive and negative plates and participate in the electrochemical reaction. The battery electrolyte in the prior art is easy to stratify the concentration of sulfuric acid during use, which expands the differential polarization, thereby ensuring the stability of the battery. The chemical impedance reduces the utilization rate of active materials, resulting in a decrease in battery capacity and a shortened cycle life. Moreover, the temperature range of the el...

Claims

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Application Information

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IPC IPC(8): H01M10/22H01M10/12
CPCY02E60/126Y02E60/10Y02P70/50
Inventor 张天任史伯荣陈清元高根芳朱健佘秋利宋文龙
Owner TIANNENG BATTERY GROUP
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