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Method for testing content of barium sulfate for negative plate of storage battery

A test method, barium sulfate technology, applied to battery electrodes, by removing certain components, weighing, circuits, etc., can solve the problems of low barium sulfate content, cumbersome process, loss, etc., to achieve simplified steps, accurate results, and reduced loss effect

Inactive Publication Date: 2013-09-18
ZHEJIANG TIANNENG BATTERY JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional test method for barium sulfate content is based on GB / T 2899-2008. This method uses barium ions as an invariant, and dissolves and reprecipitates barium sulfate. The process is cumbersome, and some losses are inevitable during the operation, resulting in the tested Barium content is lower than the actual content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Reagent preparation

[0018] Hydrochloric acid (density 1.18g / ml): 1+1

[0019] Sodium carbonate solution: 2% (prepared by mass ratio)

[0020] Barium chloride solution: 10% (prepared by mass ratio)

[0021] Methyl orange indicator: 0.5% (prepared by mass ratio)

[0022] Molten mixture: 2g anhydrous sodium carbonate + 2g potassium carbonate

[0023] Silver nitrate solution: 2% (prepared by mass ratio)

[0024] Weigh about 1g of the sample that has been dried, accurate to 0.0002g, and place it in a platinum crucible with 4g of molten mixture added, then cover it with 4g of molten mixture, place the crucible in a high-temperature furnace, and heat it at 800℃± Melt at 20°C for 40 minutes, take it out and cool; use a rubber-tipped glass rod to transfer all the white melt in the crucible to a 250ml beaker, soak in 100ml-150ml of hot water at 80°C, heat and boil until the melt is loose . Let it stand for a while, filter the supernatant liquid with slow quantitative filt...

Embodiment 2

[0031] Reagent preparation

[0032] Hydrochloric acid (density 1.19g / ml): 1+3

[0033] Sodium carbonate solution: 5% (prepared by mass ratio)

[0034] Barium chloride solution: 20% (prepared by mass ratio)

[0035] Methyl orange indicator: 1% (prepared by mass ratio)

[0036] Molten mixture: 2g anhydrous sodium carbonate + 3g potassium carbonate

[0037] Silver nitrate solution: 3% (prepared by mass ratio)

[0038] Weigh about 1.5g of the dried sample, accurate to 0.0002g, and place it in a platinum crucible with 4g of molten mixture added, then cover it with 4g of molten mixture, place the crucible in a high-temperature furnace, at 800°C Melt at ±20°C for 40 minutes, take it out and cool; use a rubber-tipped glass rod to transfer all the white melt in the crucible to a 250ml beaker, soak it in 100ml-150ml of hot water at 80°C, heat and boil until the melt loose. Let it stand for a while, filter the supernatant liquid with slow quantitative filter paper, and then wash th...

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PUM

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Abstract

The invention discloses a method for testing the content of barium sulfate for a negative plate of a storage battery. By taking anion sulfate ions of a filtrate as invariant, the content of the barium sulfate is calculated in a constant manner, and the method is different from the existing test method with the idea in which solids are placed on filter paper, lotion is used for washing and the precipitation operation is performed. The method is simple and convenient, easy to learn, and capable of reducing the loss of the barium sulfate and improving the accuracy of barium sulfate content tests.

Description

technical field [0001] The invention relates to the field of storage battery production, in particular to a method for testing the content of barium sulfate for storage battery negative poles. Background technique [0002] Barium sulfate, molecular formula is BaSO4, white crystal, melting point 1580°C, insoluble in water and acid, can be used as filler in paint, ink, rubber, plastic industry, filler for insulating tape, also used in pigments, ceramics, storage batteries, Enamel, glass and spices and other industries. [0003] Barium sulfate is used as a lead paste additive for battery negative electrodes in batteries. It has a lattice parameter similar to that of lead sulfate and is an isomorphic substance. It plays a role in delaying passivation and preventing lead surface area shrinkage during charging and discharging. The traditional test method for barium sulfate content is based on GB / T 2899-2008. This method uses barium ions as an invariant to dissolve and reprecipit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04H01M4/62
CPCY02E60/10
Inventor 茆黎明孙月姐
Owner ZHEJIANG TIANNENG BATTERY JIANGSU
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