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Preparation method of positive plate lead paste of lead-acid battery

A lead-acid battery and a production method technology, applied in lead-acid battery electrodes, battery electrodes, circuits, etc., can solve the problems of early battery capacity attenuation, poor binding force of active substances, and battery life termination, etc., and achieve extended cycle life and utilization. The effect of high rate and long life

Inactive Publication Date: 2004-11-10
中国船舶重工集团动力股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present and in the past, the low temperature of 30-45°C is used in the process of making lead paste. It is found by X-ray diffraction analysis that the composition of lead paste made at low temperature is tribasic lead sulfate 3PbO·PbSO 4 , this kind of lead paste is applied on the positive grid, and the active material formed by chemical formation has poor binding force and is easy to soften and fall off, and the battery using this lead paste will have early capacity decay problems, which will terminate the life of the battery prematurely; even if it is not The problem of early capacity attenuation occurs, and the life of the battery is short, which cannot meet the needs of the development of the automobile industry

Method used

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  • Preparation method of positive plate lead paste of lead-acid battery

Examples

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Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1: Put 50kg of lead powder (containing PbO73%~84%) into the paste mixing machine with heat exchanger, put 0.02kg of fiber at the same time, start the mixer, add 6kg of lead powder while stirring the lead powder. Purified water, stirred for 20 minutes, and then added in a spray form with a concentration of 1.40g / cm 3 Add 4.5kg of sulfuric acid, stir while adding, stir for 5 minutes after adding the acid, and reach 70°C under the temperature control of the heat exchanger of the paste mixing machine. Apparent density can reach 4.1~4.2g / cm 3 , at this time, lead paste can be produced from the paste machine, and this lead paste can be coated. 6-QW-60 battery is produced in combination with ordinary negative plate. The battery with this lead paste measures 20-hour rate capacity of 73.68Ah, and then measures the discharge voltage at -18°C and 280A: 9.91V for 30s; 9.4 for 150s V; another 20-hour rate capacity was measured to be 72.63Ah, and then the battery life te...

Embodiment 2

[0008] Example 2: According to the process and the lead paste prepared in Example 1, the temperature control temperature was changed from 70°C to 80°C, and the temperature control time was 35 minutes to 30 minutes. 6-QW-60 battery is produced in combination with ordinary negative plate, and the 20-hour rate capacity of the battery using this lead paste is 72.50Ah; -18℃, 280A discharge voltage: 9.95V for 30s; 9.45V for 150s; retest A 20-hour rate capacity is 71.41Ah; the battery life test reaches 217 times.

Embodiment 3

[0009] Example 3: According to the process and the lead paste prepared in Example 1, the temperature control temperature was changed from 70°C to 85°C, and the temperature control time was 35 minutes to 25 minutes. 6-QW-60 battery is produced in combination with ordinary negative plate, and the 20-hour rate capacity of the battery using this lead paste is 74.32Ah; -18℃, 280A discharge voltage: 9.83V for 30s; 9.29V for 150s; retest A 20-hour rate capacity is 72.56Ah; the battery life test reaches 208 times.

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Abstract

The invention discloses the method for manufacturing the lead plaster of the positive plate in the lead acid battery. The temperature is controlled at 70-95 deg.C in the invention instead of the 30-45 deg.C in the original procedure for manufacturing the lead plaster with the sulfuric acid being added into. With the lead plaster made by the invention being coated to the positive grid plates, the lead acid battery possesses the higher initial capacity and prolongs the life expectancy more than 30%. The earlier performance of the invented battery is the same as the performance of the battery made by the former technique. Moreover the invented battery can prevent the attenuation of the earlier capacity in the battery.

Description

1. Technical field: [0001] The invention relates to a preparation method of lead paste for the front plate of a lead-acid battery. 2. Background technology: [0002] Lead-acid batteries are widely used in automobiles, post and telecommunications, electric power, backup power and other fields. There are currently two ways to produce lead-acid batteries, one is the plastered flat type, and the other is the tubular powder filling type. Paste-coating production accounts for more than 95% of the entire production method due to its advantages of large capacity and high specific energy. In the plastering process, the mixing of lead paste is the most critical process in battery production. The formula and production process of lead paste largely determine the performance of lead-acid batteries and are the technical core of lead-acid battery manufacturing. The paste coating process is based on the use of lead powder, water, sulfuric acid, additives and lead paste, which is coated o...

Claims

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Application Information

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IPC IPC(8): H01M4/16H01M4/62
CPCY02E60/126Y02E60/10
Inventor 柴树松刘建民
Owner 中国船舶重工集团动力股份有限公司
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