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A long-life lead-acid battery adding acidification method

A lead-acid battery, long-life technology, applied in lead-acid batteries, lead-acid battery construction, secondary batteries, etc., can solve the problems of short life and early mudding of positive plate materials, and achieve higher ratio, longer service life, lower polarized effect

Active Publication Date: 2021-12-28
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems of early muddying and short service life of the positive plates of lead storage batteries in the prior art, the present invention provides a long-life lead storage battery acidification method

Method used

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  • A long-life lead-acid battery adding acidification method
  • A long-life lead-acid battery adding acidification method
  • A long-life lead-acid battery adding acidification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Get the 6-DZM-20 battery semi-finished product, adopt the method of the present invention to add acid and form, the sample preparation process is as follows:

[0030] 1) Adding acid for the first time, add a density of 1.05g / cm2 to the lead-acid battery to be added 3 Sulfuric acid solution, the acid volume is 148ml (single cell saturated absorption is 163-165ml, which is about 90% of the saturated acid absorption), and the acid is added in vacuum, the vacuum degree is -0.08MPa, and the vacuum is 1-2 times .

[0031] 2) After the battery that has been added acid for the first time is left to stand for 1 hour, a safety valve is installed and the first stage of the formation process is started, at 3.6A (the current density is 5mA / mm 2 ) Constant current charging for 21h (charging capacity 75.6Ah, 3.78C).

[0032] 3) After the first stage of formation is completed, add acid to the battery for the second time, using vacuum acid addition (vacuum degree -0.08MPa, vacuum 2 to...

Embodiment 2

[0036] Get the 6-DZM-20 battery semi-finished product, adopt the method of the present invention to add acid and form, the sample preparation process is as follows:

[0037] 1) Add acid for the first time, add a density of 1.10g / cm2 to the lead-acid battery to be added 3Sulfuric acid solution, the acid volume is 155ml (single-cell saturated liquid absorption is 163-165ml, which is about 94% of the saturated acid absorption), and the acid is added in vacuum, the vacuum degree is -0.06MPa, and the vacuum is 1-2 times .

[0038] 2) After the battery that has been added acid for the first time is left to stand for 1.5 hours, a safety valve is installed and the first stage of the formation process is started. 2 ) Constant current charging for 38.9h (charging capacity 70Ah, 3.5C).

[0039] 3) After the first stage of formation is completed, add acid to the battery for the second time, using vacuum acid addition (vacuum degree -0.08MPa, vacuum 2 to 4 times), the acid density is 1.5...

Embodiment 3

[0043] Get the 6-DZM-20 battery semi-finished product, adopt the method of the present invention to add acid and form, the sample preparation process is as follows:

[0044] 1) Add acid for the first time, add a density of 1.20g / cm2 to the lead-acid battery to be added 3 Sulfuric acid solution, the acid volume is 165ml (single-cell saturated liquid absorption is 163-165ml, which is about 100% of the saturated acid absorption), and the acid is added in vacuum, the vacuum degree is -0.1MPa, and the vacuum is 1-2 times .

[0045] 2) After the first acid addition, the battery was left to stand for 0.5 hours, then a safety valve was installed and the first stage of the formation process was started, at 3.6A (the current density was 5mA / mm 2 ) Constant current charging for 22.2h (charging capacity 80Ah, 4.0C).

[0046] 3) After the first stage of formation is completed, add acid to the battery for the second time, using a vacuum acid addition method (vacuum degree -0.08MPa, vacuum...

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Abstract

The invention discloses a method for adding acid to a long-life lead storage battery, which comprises the following steps: (1) adding acid for the first time, adding acid with a density of 1.05 to 1.25 g / cm to the lead storage battery to be acidified. 3 The low specific gravity sulfuric acid solution, the added volume is 90%~105% of the saturated acid absorption capacity of the lead storage battery; (2) the first stage of formation, charging, and the total charging power is 3.5C~5.0C; (3) the second acid addition , adding a density of 1.25 ~ 1.65g / cm 3 (4) the second stage is formed, first discharge and then recharge, the depth of discharge is 25% to 80%, and the total charge is 3.5C to 5.0C; (5) pump out residual acid. In the present invention, by adding acid twice, the positive electrode active material α-PbO is effectively increased 2 / β‑PbO 2 Ratio, so as to prolong the service life of the battery, and at the same time, it can effectively reduce the polarization, improve the formation efficiency, and shorten the formation cycle.

Description

technical field [0001] The invention relates to the technical field of lead storage battery production, in particular to an acidification method for long-life lead storage batteries. Background technique [0002] Lead-acid batteries have a history of more than 150 years and have been used in a wide range of fields. In recent years, electric vehicles have developed rapidly in my country due to their better mobility performance, lower storage space requirements and excellent price advantages. Thanks to this, the battery industry has also developed rapidly. [0003] Lead storage battery is a reversible DC power supply, which can convert chemical energy into electrical energy, and also convert electrical energy into chemical energy. Lead storage battery is mainly composed of electrolyte, tank cover and pole group. The electrolyte of lead storage battery is sulfuric acid solution. The pole group is mainly composed of positive plate, negative plate and separator. The separator is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/609H01M10/44H01M10/12
CPCH01M10/12H01M10/446H01M50/60Y02E60/10Y02P70/50
Inventor 李桂发赵海敏郭志刚崔海涛刘玉邓成智李亚田庆山李丹
Owner TIANNENG BATTERY GROUP