Vacuum paste mixing process of lead-acid power battery

A power battery and lead-acid technology, applied in the direction of lead-acid battery electrodes, etc., can solve the problems of unsatisfactory initial capacity and cycle performance of lead paste, inability to accurately control the temperature of lead paste and paste, and imbalance of the proportion of lead paste components, etc. The effect of good capacity and cycle performance, good consistency and structural composition, and strong operability

Active Publication Date: 2014-12-24
ANHUI YONGHENG STORAGE BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem that the paste mixing process in the prior art cannot accurately control the paste temperature during the paste paste process, and the proportion of components in the obtained paste is unbalanced, and the structure composition is inconsistent, so that the initial capacity and cycle performance of the paste are not enough The ideal problem is to provide a vacuum and paste process for lead-acid power batteries with simple process steps, strong operability, stable and controllable paste process, and good lead paste performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A vacuum and paste process for lead-acid power batteries, including adding materials, dry mixing, adding water, wet mixing, adding acid and stirring. The specific steps of adding materials are: first add lead powder accounting for half of the total lead powder in the formula to the paste In the machine, after the lead powder is evenly spread on the bottom of the paste machine, add the additives to the paste machine, and finally add the remaining half of the lead powder in the formula to the paste machine; the dry mixing time is controlled at 3 minutes; the water intake time Control at 15s; control wet mixing time at 2min; add acid in five steps:

[0033] (1) Add dilute sulfuric acid with a total acid content of 20%, control the acid addition time at 2 minutes, keep stirring during the acid addition and control the final temperature of the lead paste at 55°C;

[0034] (2) Add dilute sulfuric acid with a total acid content of 15-25%, control the acid addition time at 2 mi...

Embodiment 2

[0046] A vacuum and paste process for lead-acid power batteries, including adding materials, dry mixing, adding water, wet mixing, adding acid and stirring. The specific steps of adding materials are: first add lead powder accounting for half of the total lead powder in the formula to the paste In the machine, after the lead powder is evenly spread on the bottom of the paste machine, add the additives to the paste machine, and finally add the remaining half of the lead powder in the formula to the paste machine; the dry mixing time is controlled at 4 minutes; the water intake time Control at 20s; wet mixing time at 3 minutes; add acid in five steps:

[0047] (1) Add dilute sulfuric acid with a total acid content of 22%, control the acid addition time at 2.5 minutes, keep stirring during the acid addition and control the final temperature of the lead paste at 56°C;

[0048] (2) Add dilute sulfuric acid with a total acid content of 20%, control the acid addition time at 2.5 minu...

Embodiment 3

[0060] A vacuum and paste process for lead-acid power batteries, including adding materials, dry mixing, adding water, wet mixing, adding acid and stirring. The specific steps of adding materials are: first add lead powder accounting for half of the total lead powder in the formula to the paste In the machine, after the lead powder is evenly spread on the bottom of the paste machine, add the additives to the paste machine, and finally add the remaining half of the lead powder in the formula to the paste machine; the dry mixing time is controlled at 5 minutes; the water intake time Controlled at 45s; wet mixing time controlled at 4min; adding acid is carried out in five steps:

[0061] (1) Add dilute sulfuric acid with a total acid content of 30%, control the acid addition time within 3 minutes, keep stirring during the acid addition and control the final temperature of the lead paste at 60°C;

[0062] (2) Add dilute sulfuric acid with a total acid content of 25%, control the a...

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PUM

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Abstract

The invention discloses a vacuum paste mixing process of a lead-acid power battery, which is used for solving the problems of the paste mixing process of the prior art that the paste mixing temperature of the lead paste cannot be precisely controlled, the ratio of components in the prepared lead paste is unbalanced, the structure constitution is inconsistent, and thus the initial capacity and cycling performance of the lead paste are not ideal. The paste mixing process comprises the steps of feeding material, dry mixing, adding water, wet mixing, acidifying and stirring, wherein both the acidification and the stirring are performed in five steps, the acidification amount and lead paste temperature are controlled in each step of the acidification, the lead paste is maintained at the temperature of 72 to 82 2DEG C for 4 to 6 minutes in the acidifying process to form a generation stage of tetrabasic lead sulfate, the stirring time and cooling speed of the lead paste are controlled in each step of the stirring process, and the lead paste is maintained at the temperature of 45 to 50 DEG C for 0.5 to 1.5 minutes in the stirring process to form a performance stable stage. The process is simple in procedures, strong in operability and stable and controllable in process, and the prepared lead paste is good in consistent, high in initial capacity and good in cycling performance.

Description

technical field [0001] The invention relates to the technical field of lead-acid batteries, in particular to a vacuum and paste process for lead-acid power batteries. [0002] Background technique [0003] For pasted lead-acid batteries, the production process mainly consists of lead powder manufacturing, grid manufacturing, lead paste mixing, plate coating, plate curing and drying, plate formation and battery assembly. Among the above processes, the preparation of lead paste is an important, complicated and difficult-to-control process in the production process of lead-acid batteries. Lead paste is an important part of lead-acid batteries. It is a paste made of lead powder, water, dilute sulfuric acid and additives mixed in a paste machine. It is a carrier for mutual conversion of electrical energy and chemical energy. Therefore, the performance of lead paste The quality of battery directly determines the quality of battery performance. [0004] For example, the applicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/20
CPCH01M4/20Y02E60/10
Inventor 张恭政徐丹项晨
Owner ANHUI YONGHENG STORAGE BATTERY
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