Method for pretreating raw polar plates for internal formation

A raw plate and pretreatment technology, applied in the direction of lead-acid battery electrodes, etc., can solve the problems of uneven dispersion of colloidal electrolyte, high temperature of battery acid addition, and poor state of separators, so as to improve capacity consistency and qualified capacity Efficiency, reduction of floating powder on the surface, relief of inconvenience

Active Publication Date: 2014-11-05
TIANNENG BATTERY GROUP
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a pretreatment method for internal formation of raw plates, the method has simple steps, solves the problems of high acid addition temperature and high formation temperature of batteries in the prior art, and improves battery capacity consistency and capacity pass rate , solves the problem of uneven dispersion of colloidal electrolyte due to uneven temperature, eliminates the problems of poor state of separators formed by traditional internalization, white flowers on plates, and unclean poles, thereby improving the overall performance of the product and prolonging the product cycle. life

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for pretreating raw polar plates for internal formation
  • Method for pretreating raw polar plates for internal formation
  • Method for pretreating raw polar plates for internal formation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Acid pickling treatment: Use low-density 1.08g / mL (25°C) dilute sulfuric acid to completely immerse the polar plates. The temperature of the dilute sulfuric acid should be 10°C, the positive plate immersion time is 80 minutes, and the negative plate immersion time is 40 minutes.

[0025] Secondary drying treatment: After the soaking time is completed, the electrode plate is taken and placed on the curing rack (the method is the same as the coating plate and placed on the curing rack), enter the drying room, and use temperature segmented drying, the first stage is 45℃× 3h, the second stage is 65℃×6h, and the third stage is 35℃×3h.

[0026] After the plate is dried, we sample the material content of the plate for testing. The material content of the plate before the above treatment is also analyzed:

[0027] Positive plate: 4 points are tested separately (refer to the distribution of test points figure 1 ), the results are shown in Table 1:

[0028] Table 1

[0029]

[0030] Nega...

Embodiment 2

[0065] Acid pickling treatment: The electrode plates are completely immersed in dilute sulfuric acid with a density of 1.18g / mL (25°C). The temperature of the dilute sulfuric acid is required to be 25°C, the immersion time of the positive plate is 60 minutes, and the immersion time of the negative plate is 30 minutes.

[0066] Secondary drying treatment: After the soaking time is completed, the electrode plate is taken and placed on the curing rack (the method is the same as the coating plate and placed on the curing rack), enter the drying room, and use temperature segmented drying, the first stage is 50℃× 3h, 75℃×6h for the second stage, 40℃×3h for the third stage.

[0067] After the plate is dried, we sample the material content of the plate for testing. The material content of the plate before the above treatment is also analyzed:

[0068] Positive plate: 4 points are tested separately (test points such as figure 1 Shown), the test results are shown in Table 5:

[0069] table 5

...

Embodiment 3

[0106] Acid immersion treatment: The electrode plates are completely immersed in dilute sulfuric acid with a density of 1.28g / mL (25°C). The temperature of the dilute sulfuric acid is 35°C, the immersion time of the positive plate is 40 minutes, and the immersion time of the negative plate is 20 minutes.

[0107] Secondary drying treatment: After the soaking time is completed, the plate is taken and placed on the curing rack (the method is the same as the coating plate and placed on the curing rack), enter the drying room, and use temperature segmented drying, the first stage is 55℃× 3h, the second stage is 85℃×6h, and the third stage is 45℃×3h.

[0108] After the plate is dried, we sample the material content of the plate for testing. The material content of the plate before the above treatment is also analyzed:

[0109] Positive plate: 4 points are tested separately (refer to the distribution of test points figure 1 ), the test results are shown in Table 9:

[0110] Table 9

[0111]...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for pretreating raw polar plates for internal formation. The method comprises the following steps: (1), soaking the raw polar plates subjected to solidification and drying into dilute sulfuric acid with the density of 1.01 to 1.40 g / mL (at the temperature of 25 DEG C), wherein the soaking time of the positive plate is 20 to 80 minutes and the soaking time of the negative plate is 10 to 50 minutes; and (2), drying the soaked raw polar plates. By the pretreatment method, the raw polar plates are pretreated, the floating powder on the surfaces of the polar plates is obviously reduced, and dust pollution on a clamping board and a sheet wrapping board is basically avoided in the turnover process and the sheet wrapping process of the polar plates. By the pretreatment method, the temperature basically keeps at 30 to 35 DEG C after a battery is acidified, the battery temperature basically maintains to be 40 to 45 DEG C in the charging process, and advantages are brought to formation of the polar plates, so that bad hidden danger is reduced during the traditional internal formation production.

Description

Technical field [0001] The invention relates to the technical field of internalization of lead-acid batteries, in particular to a pretreatment method of a raw electrode plate for internalization. Background technique [0002] The formation of polar plates refers to the process of using chemical and electrochemical reactions to transform polar plates into positive and negative plates with electrochemical characteristics. The main part of the lead paste material of the electrode plate before chemical conversion is the same. It is composed of lead oxide, metallic lead, lead sulfate, tribasic lead sulfate or tetrabasic lead sulfate. In principle, there is no difference between positive and negative electrodes. . Through the process of formation, the lead paste material of the electrode plate to be formed into the positive plate is transformed into the phase structure with lead dioxide as the main body to form the positive plate, and the lead paste material of the electrode plate to ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/16
CPCY02E60/126Y02E60/10
Inventor 陈清元李桂发张天任沈旭培张林山夏俊礼高根芳刘清平刘玉邓成智代飞吴飞宋文龙
Owner TIANNENG BATTERY GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap