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Acid adding and formation method of lead storage battery

A formation method and technology of lead-acid batteries, applied in the direction of lead-acid batteries, lead-acid battery construction, battery pack components, etc., can solve the problems of low electrolyte density, low formation efficiency, several hours to more than 30 hours, etc.

Active Publication Date: 2021-09-14
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The plate of the flooded lead-acid battery is relatively thin, and the density of the electrolyte added is relatively low, and the formation time is usually more than ten hours to more than 30 hours. However, the thickness of the plate of the AGM lead-acid battery is thick, and the electrolyte added The density is also relatively high, and the formation efficiency is low, usually it takes three days

Method used

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  • Acid adding and formation method of lead storage battery
  • Acid adding and formation method of lead storage battery
  • Acid adding and formation method of lead storage battery

Examples

Experimental program
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Effect test

Embodiment 1

[0058] Take a 12V, 20Ah lead-acid battery, and use an acid-adding pot to add a low-density electrolyte with a density of 1.10g / mL, which accounts for 60% of the pressurized absorption volume of the electrode group, to the lead-acid battery. The temperature of the low-density electrolyte is 10°C , the mass fraction of sodium sulfate in the low-density electrolyte is 2.5%; after adding the low-density electrolyte, under the negative pressure of 0.095MPa, vacuumize for 5S, then empty for 3S, and repeat 3 times. After the state of the lead-acid battery is stable, add a medium-density electrolyte with a density of 1.35g / mL to the connection between the safety valve hole and the acid pot. The temperature of the medium-density electrolyte is 0°C. Vacuum down for 8S and vent for 2S. After the state of the lead-acid battery is stable, add high-density electrolyte with a density of 1.55g / mL accounting for 20% of the pressurized liquid absorption volume of the separator by gravity, and t...

Embodiment 2

[0064] Take a 12V, 20Ah lead-acid battery, and use an acid-adding pot to add low-density electrolyte solution with a density of 1.20g / mL accounting for 70% of the pressure-absorbed volume of the electrode group to the lead-acid battery. The temperature of the low-density electrolyte solution is 0°C , the mass fraction of magnesium sulfate in the low-density electrolyte is 1.5%; after adding the low-density electrolyte, under the negative pressure of 0.095MPa, vacuumize for 8S, then empty for 5S, and repeat twice. After the lead-acid battery is in a stable state, add a medium-density electrolyte with a density of 1.25g / mL to the connection between the safety valve hole and the acid pot. The temperature of the medium-density electrolyte is 35°C. Vacuum down for 5S and vent for 2S. After the state of the lead-acid battery is stable, add high-density electrolyte with a density of 1.40g / mL accounting for 30% of the pressurized liquid absorption volume of the separator by gravity, a...

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Abstract

The invention discloses an acid adding and formation method of a lead storage battery, and belongs to the field of lead storage battery manufacturing. The method comprises the following steps: (1) adding low-density electrolyte with the volume being 60-70% of that of plate group pressurized suction liquid and the density being 1.10-1.20 g / mL under the condition of negative pressure pumping; (2) adding an electrolyte to enable the electrolyte to reach a joint of a safety valve hole of the battery and an acid pot, and adding a medium-density electrolyte with the density of 1.25-1.35 g / mL under a negative pressure pumping condition; (3) adding a high-density electrolyte of which the volume is 20-30% of the volume of the partition plate pressurized suction liquid and the density is 1.40-1.55 g / mL by virtue of gravity; and (4) performing formation. The electrolyte with different densities and volumes is added in different modes, and the formation process is matched, so that the formation time is shortened, the energy consumption is reduced, and the formation efficiency and the production efficiency are improved.

Description

technical field [0001] The invention belongs to the field of lead storage battery manufacturing, and mainly relates to a method for adding acid and forming a lead storage battery. Background technique [0002] Lead-acid batteries still have great advantages in secondary batteries because of their economy and safety. However, under the impact of other secondary batteries, improving the performance of lead-acid batteries and reducing their production costs are the two main tasks for the development of lead-acid batteries. Formation is one of the main processes in the production of lead-acid batteries, and improving the formation efficiency of lead-acid batteries is of great significance for reducing production costs. The plate of the flooded lead-acid battery is relatively thin, and the density of the electrolyte added is relatively low, and the formation time is usually more than ten hours to more than 30 hours. However, the thickness of the plate of the AGM lead-acid battery...

Claims

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Application Information

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IPC IPC(8): H01M50/609H01M10/12H01M10/08
CPCH01M50/609H01M10/12H01M10/08Y02P70/50Y02E60/10
Inventor 姚秋实李靖洪声东张峰博安炎韬朱建峰刘玉王杜友孔鹤鹏
Owner TIANNENG BATTERY GROUP