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Manufacturing method of lead-acid storage battery

A lead-acid battery and a manufacturing method technology, applied in the direction of lead-acid battery, lead-acid battery construction, final product manufacturing, etc., can solve the problems of incomplete formation, affecting the efficiency of formation, shortening battery life, etc., to save energy and ensure battery life. Longevity and the effect of improving the conversion efficiency

Inactive Publication Date: 2020-11-10
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the process of manufacturing lead-acid batteries, it is necessary to form the plates. At present, the internal formation methods widely used in valve-regulated lead-acid batteries (VRLAB) all have low formation efficiency, long time, high energy consumption, and short life. and other shortcomings
[0003] Due to the limitation of the internal cavity volume of the battery, in order to ensure that the battery meets the capacity requirements after formation, in order to ensure the amount of acid, the defect of insufficient sulfuric acid has to be compensated by increasing the concentration of the electrolyte, and the formation is completed under the condition of high H2SO4 concentration , although the battery capacity can meet the requirements, a large amount of HSO4– ions are adsorbed in the gel region of PbO2 particles, blocking the active center of PbO2 electrochemical reduction reaction, so the electrode capacity decays
At the same time, it is difficult to form the skeleton structure of the positive electrode active material under the condition of high concentration of sulfuric acid, which causes the positive electrode active material to fall off and muddy during the cycle, shortening the battery life
The conventional internal formation process also has a method of adding low-density acid first, and then adding high-density acid to complete the formation. Although it also meets the capacity requirements after formation, because the low-density formation battery is not completely penetrated, continue to add high-density sulfuric acid. During formation, it will lead to incomplete formation, which will also affect battery life and formation efficiency
[0004] The conventional chemical synthesis process is formed in a high-density acid environment. Due to the strong acidic environment, it is difficult to form the skeleton structure of the positive electrode active material.
Moreover, the conventional chemical formation process is in a liquid-rich state, the saturation of the separator is too high, the water decomposition is serious during the chemical formation process, and the energy consumption is high

Method used

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  • Manufacturing method of lead-acid storage battery

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Take 6-DZF-20 glue-sealed battery semi-finished products, and use the method of the present invention to add acid and chemically form. The sample preparation process is as follows:

[0016] 1) Add acid for the first time, add sulfuric acid solution with a density of 1.06g / cm3 to the lead-acid battery to be added, the volume of acid added is 140ml, and the saturated acid absorption of the separator is about 82%, and acid is added by vacuum acid adder.

[0017] 2) Place the battery that has been acidified for the first time in a water bath, connect the charging cable clamp, turn on the charger, and proceed according to the process in Table 1.

[0018] Table 1 6-DZF-20 manufacturing process

[0019] step Way Current (A) time (h) Power (Ah) 1 Charge 0.4 0.5 0.2 2 Charge 0.8 0.5 0.4 3 Charge 1.6 0.5 0.8 4 Charge 3 0.5 1.5 5 Charge 3.5 0.875 3.0625 6 Charge 4 14 56 7 Charge 3 2.88 8.64 8 Ch...

Embodiment 2

[0024] Take 6-DZF-20 glue-sealed battery semi-finished products, and use the method of the present invention to add acid and chemically form. The sample preparation process is as follows:

[0025] 1) Add acid for the first time, add sulfuric acid solution with a density of 1.17g / cm3 to the lead-acid battery to be added, add acid volume of 145ml, about 86.34% of the saturated acid absorption of the separator, and use a vacuum acid adder to add acid.

[0026] 2) Place the battery that has been acidified for the first time in a water bath, connect the charging cable clamp, turn on the charger, and proceed according to process 1 in the table.

[0027] 3) When the 8th step of the formation is completed, the charging power reaches 126Ah, and the formation is complete, that is, the conversion of basic lead sulfate and lead oxide is completed.

[0028] 4) Start to add the blended acid, use a vacuum acid machine to add acid, the density of the blended acid is 1.55g / cm3, and the amount ...

Embodiment 3

[0031] Take 6-DZF-20 glue-sealed battery semi-finished products, and use the method of the present invention to add acid and chemically form. The sample preparation process is as follows:

[0032] 1) Add acid for the first time, add sulfuric acid solution with a density of 1.28g / cm3 to the lead-acid battery to be added, add acid volume of 155ml, about 95.4% of the saturated acid absorption of the separator, and use a vacuum acid adder to add acid.

[0033] 2) Place the battery that has been acidified for the first time in a water bath, connect the charging cable clamp, turn on the charger, and proceed according to the process in Table 1.

[0034] 3) When the 8th step of the formation is completed, the charging power reaches 126Ah, and the formation is complete, that is, the conversion of basic lead sulfate and lead oxide is completed.

[0035] 4) Start to add the blended acid, use a vacuum acid machine to add acid, the density of the blended acid is 1.28g / cm3, and the amount a...

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Abstract

The invention relates to a manufacturing method of a storage battery, and the method comprises the following steps: 1, adding a first density sulfuric acid solution with the density of 1.04 g / cm <3>-1.28 g / cm <3> into a lead-acid storage battery; 2, performing electrifying for complete formation; 3, adding a second density sulfuric acid solution into the formed battery, and carrying out the blending, wherein the density of the second density sulfuric acid solution is 1.25-1.6 g / cm <3>, and the density of the second density sulfuric acid solution is greater than the density of the first densitysulfuric acid solution. According to the manufacturing method of the storage battery, not only is the service life of the battery ensured, but also the capacity requirement can be met; in addition, the formation efficiency can be improved, the energy is saved, and greater convenience is provided for producing batteries with different capacities.

Description

technical field [0001] The invention relates to the field of lead-acid batteries. Background technique [0002] In the process of manufacturing lead-acid batteries, it is necessary to form the plates. At present, the internal formation methods widely used in valve-regulated lead-acid batteries (VRLAB) all have low formation efficiency, long time, high energy consumption, and short life. and other shortcomings. [0003] Due to the limitation of the internal cavity volume of the battery, in order to ensure that the battery meets the capacity requirements after formation, in order to ensure the amount of acid, the defect of insufficient sulfuric acid has to be compensated by increasing the concentration of the electrolyte, and the formation is completed under the condition of high H2SO4 concentration , although the battery capacity can meet the requirements, but a large number of HSO4– ions are adsorbed in the gel region of PbO2 particles, blocking the active center of PbO2 el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/12H01M2/36
CPCH01M10/12Y02E60/10Y02P70/50
Inventor 杨新新周刚程志明
Owner CHAOWEI POWER CO LTD
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