Ni-mh battery positive electrode paste smelting and mixing process

Abstract

The present invention provides a Ni-mh battery positive electrode paste smelting and mixing process. Dry powder materials, a binder, a dispersing agent and deionized water are weighed in proportion, the dry powder materials are arranged in a smelting and mixing vessel for low-speed uniform mixing, the deionized water is added into the smelting and mixing vessel at twice, the mixture is subjected to stirring and paste scrapping, the binder and the dispersing agent are added into the smelting and mixing vessel in order for respective uniform stirring, and finally, the smelting and mixing vesselis subjected to vacuum supply while stirring to prepare a Ni-mh battery positive electrode paste, the amount of the deionized water added in the first time is 68-84% of the amount required by the deionized water, the amount of the deionized water added in the second time is the rest of the amount of the deionized water. The Ni-mh battery positive electrode paste smelting and mixing process is simple and feasible, can reduce the smelting and mixing time and is good in paste uniformity.

Description

technical field

[0001] The invention relates to a nickel-hydrogen battery cathode slurry refining process. Background technique

[0002] The performance of nickel-metal hydride batteries is affected by the mixing process of positive electrode slurry and negative electrode slurry, especially the mixing process of positive electrode slurry has a greater impact on battery performance. However, the current refining process of positive electrode slurry generally adopts one-time addition of deionized water, which takes a long time and has poor stirring uniformity. It is easy to delaminate, which eventually makes the filling of the plate uneven. Therefore, how to improve the mixing process of positive electrode wet slurry has become a research direction to improve battery performance. Contents of the invention

[0003] The invention aims to provide a nickel-hydrogen battery anode slurry mixing process which is simple and feasible, can reduce mixing time and has good slurry unif...

Examples

Embodiment 1

[0020] A nickel-metal hydride battery D6000 positive electrode slurry mixing process, weigh each dry powder material, binder, dispersant and deionized water in proportion, put each dry powder material in a mixing ax and stir and mix evenly, the stirring speed is 14rpm , the stirring time is controlled to be 20min, and then 70% of the required amount of deionized water is added to the mixing ax for the first time, using planetary stirring, the stirring speed is controlled at 13rpm, and the slurry is scraped after stirring for 5min. Continue to stir for 30 minutes, the total stirring time is controlled to 35 minutes, and then add the remaining deionized water to the mixing ax for the second time, that is, 30% of the required amount of deionized water, using planetary stirring, and the stirring speed is controlled at 16rpm, The total stirring time is controlled at 15 minutes. After the stirring is completed, the slurry is scraped. After the scraping, the binder is added to the mix...

Embodiment 2

[0026] A nickel-hydrogen battery D5000 positive electrode slurry mixing process, its steps are basically the same as the steps of the nickel-hydrogen nickel-hydrogen battery D6000 positive electrode slurry mixing process of embodiment 1, the difference is: the stirring speed of each dry powder material is The control is 16rpm, and the stirring time is controlled as 35min; the amount of deionized water added for the first time is 77% of the required amount of deionized water, the stirring speed after adding deionized water for the first time is 20rpm, and the total stirring time is 40min. The amount of deionized water added for the second time is 23% of the remaining amount of deionized water, that is, the total amount of deionized water required. After adding deionized water for the second time, disc stirring is adopted, and the stirring speed is controlled at 1000rpm, and the total stirring time is controlled at 20min, adding binder, dispersant and finally vacuumize the stirri...

Embodiment 3

[0032]A nickel-hydrogen battery D6000 positive electrode slurry mixing process, its steps are basically the same as the steps of the nickel-hydrogen nickel-hydrogen battery D6000 positive electrode slurry mixing process of embodiment 1, the difference is: the stirring speed of each dry powder material is The control is 20rpm, and the stirring time is controlled as 40min; the amount of deionized water added for the first time is 84% ​​of the required amount of deionized water, the stirring speed after adding deionized water for the first time is 25rpm, and the total stirring time is 45min. The amount of deionized water added for the second time is 16% of the remaining amount of deionized water, that is, the total amount of deionized water required. After adding deionized water for the second time, planetary stirring and disc stirring are used to carry out simultaneously, and the speed of planetary stirring is controlled as 25rpm, the disc stirring speed is controlled at 1200rpm,...

technical field

[0001] The invention relates to a nickel-hydrogen battery cathode slurry refining process. Background technique

[0002] The performance of nickel-metal hydride batteries is affected by the mixing process of positive electrode slurry and negative electrode slurry, especially the mixing process of positive electrode slurry has a greater impact on battery performance. However, the current refining process of positive electrode slurry generally adopts one-time addition of deionized water, which takes a long time and has poor stirring uniformity. It is easy to delaminate, which eventually makes the filling of the plate uneven. Therefore, how to improve the mixing process of positive electrode wet slurry has become a research direction to improve battery performance. Contents of the invention

[0003] The invention aims to provide a nickel-hydrogen battery anode slurry mixing process which is simple and feasible, can reduce mixing time and has good slurry unif...

Examples

Embodiment 1

[0020] A nickel-metal hydride battery D6000 positive electrode slurry mixing process, weigh each dry powder material, binder, dispersant and deionized water in proportion, put each dry powder material in a mixing ax and stir and mix evenly, the stirring speed is 14rpm , the stirring time is controlled to be 20min, and then 70% of the required amount of deionized water is added to the mixing ax for the first time, using planetary stirring, the stirring speed is controlled at 13rpm, and the slurry is scraped after stirring for 5min. Continue to stir for 30 minutes, the total stirring time is controlled to 35 minutes, and then add the remaining deionized water to the mixing ax for the second time, that is, 30% of the required amount of deionized water, using planetary stirring, and the stirring speed is controlled at 16rpm, The total stirring time is controlled at 15 minutes. After the stirring is completed, the slurry is scraped. After the scraping, the binder is added to the mix...

Embodiment 2

[0026] A nickel-hydrogen battery D5000 positive electrode slurry mixing process, its steps are basically the same as the steps of the nickel-hydrogen nickel-hydrogen battery D6000 positive electrode slurry mixing process of embodiment 1, the difference is: the stirring speed of each dry powder material is The control is 16rpm, and the stirring time is controlled as 35min; the amount of deionized water added for the first time is 77% of the required amount of deionized water, the stirring speed after adding deionized water for the first time is 20rpm, and the total stirring time is 40min. The amount of deionized water added for the second time is 23% of the remaining amount of deionized water, that is, the total amount of deionized water required. After adding deionized water for the second time, disc stirring is adopted, and the stirring speed is controlled at 1000rpm, and the total stirring time is controlled at 20min, adding binder, dispersant and finally vacuumize the stirri...

Embodiment 3

[0032]A nickel-hydrogen battery D6000 positive electrode slurry mixing process, its steps are basically the same as the steps of the nickel-hydrogen nickel-hydrogen battery D6000 positive electrode slurry mixing process of embodiment 1, the difference is: the stirring speed of each dry powder material is The control is 20rpm, and the stirring time is controlled as 40min; the amount of deionized water added for the first time is 84% ​​of the required amount of deionized water, the stirring speed after adding deionized water for the first time is 25rpm, and the total stirring time is 45min. The amount of deionized water added for the second time is 16% of the remaining amount of deionized water, that is, the total amount of deionized water required. After adding deionized water for the second time, planetary stirring and disc stirring are used to carry out simultaneously, and the speed of planetary stirring is controlled as 25rpm, the disc stirring speed is controlled at 1200rpm,...

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