Growth plate curing and dying process of lead-acid accumulator
A lead-acid battery, curing and drying technology, applied in the direction of lead-acid battery electrodes, etc., can solve the problems of sloughing and falling off of positive active materials, affecting battery life, and rusting the plate frame, so as to achieve not easy falling off, prolong service life, reduce wasteful effect
Inactive Publication Date: 2010-10-06
FENGFAN
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Problems solved by technology
During the use of the battery manufactured by the above process, it is found that the capacity of the former is reduced, and the latter is prone to the phenomenon of muddying and falling off of the positive active material, which affects the battery life
In addition, high-humidity curing needs to add a large amount of water vapor during the curing stage to maintain the ambient humidity in the curing room. Due to the high humidity, water vapor is easy to condense and drip on the iron plate frame at the top of the curing room, causing the plate frame to be damaged. Rust, and the rust is very easy to contact with the raw board to form a rusty board
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[0010] The present invention determines the preferred environmental humidity, temperature and time through repeated tests. The method can make the water in the green board slowly lose, which is beneficial to the oxidation of free lead in the green board and the generation of voids; the curing and drying temperature is strictly controlled, and the long-term The time curing method controls the occurrence and speed of the reaction inside the green board, so that the components inside the green board, especially 3PbO·PbSO 4 ·H 2 O and 4PbO·PbSO 4 Keep the proportions right. Empirical data proves that the proper proportion of 3PbO·PbSO4·H2O and 4PbO·PbSO4 in the raw board should be about 20% of the latter, so as to ensure that the battery has good initial performance and cycle life at the same time. At the same time, the long-term curing and drying method is adopted, on the one hand, the strength of the raw board and the content of free lead are controlled within the range requir...
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The invention provides a lead-acid accumulator raw plate solidification drying process which is used for solving the problems that the raw plate active matter is easy to occur argillization, and be desquamated, etc. The technical proposal of the invention is that the procedure is carried out in a solidification drying chamber, with the process parameters as follows: 60 to 95 percent of solidification relative humidity of positive raw plate, 30 to 45 DEG C of solidification temperature thereof, 56 to 72 hours of solidification time thereof; 60 to 80 percent of solidification relative humidity of negative raw plate, 30 to 45 DEG C of solidification temperature thereof and 36 to 48 hours of solidification time thereof. The process of the invention is beneficial for reducing the free lead content in the raw plate, obviously improves the adhesion of the lead paste and the grid plate, prolongs the service life of the accumulator, and reduces the generation of rust plate and the dosage of water vapor during the solidification. The comparison detection indicates that the service life of the accumulator prepared by the raw plate which is processed by the process of the invention is prolonged by about 20 percent compared with the original process.
Description
technical field [0001] The invention relates to a raw board curing and drying process used in the production process of lead-acid batteries, belonging to the technical field of batteries. Background technique [0002] In the manufacturing process of lead-acid batteries, curing and drying is an intermediate process connecting raw board paste and chemical formation processes. The raw plate after coating has too much moisture on the one hand, and the lead paste structure is unstable on the other hand, so it needs to go through a curing and drying process to harden and dehydrate it. During the hardening and dehydration process, a series of physical and chemical reactions occur. If the curing and drying effect of the raw plate is not good, it will have a great impact on the quality of the plate, and it will cause plate cracks, powder removal, and crisping, which will directly affect the battery capacity and life. The effect of curing and drying can be simply summarized as: conti...
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IPC IPC(8): H01M4/21H01M4/23
CPCY02E60/126Y02E60/10
Inventor 许运洲刘建民毛治国
Owner FENGFAN