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A kind of lead-acid battery positive plate and preparation method thereof
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A lead-acid battery and positive plate technology, applied in lead-acid battery electrodes, lead-acid batteries, electrode manufacturing, etc., can solve the problems affecting battery performance, difficult to control particle size and content, etc., to improve battery life, improve performance, guarantee The effect of consistency
Active Publication Date: 2019-06-18
TIANNENG BATTERY GROUP
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Problems solved by technology
[0007] The invention provides a method for preparing a positive plate of a lead storage battery, which overcomes the problem that the particle size and content of 4BS in the active material of the positive plate prepared in the prior art are difficult to control, thereby affecting the performance of the battery
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Embodiment 1
[0036] Select two different lead pastes and mix them at a mixing ratio of 1:10. After assembling the battery, conduct a life comparison experiment and perform the following experiments.
[0037] A production of high content 4BS lead paste
[0038]First, add 100Kg of lead powder into the vacuum paste machine, add 70g of fiber to the lead powder, dry stir for 3 minutes, add 12 liters of water, stir for another 3 minutes, then add acid, the specific gravity of the acid is 1.4, and the amount of acid is 10kg. Adjust the angle of the acid feeding nozzle, control the acid adding time at 5 minutes, and set the highest temperature to 80°C, set the vacuum degree of the vacuum paste machine at 483.8mbar, and then keep it for 10 minutes during the stirring process, so that A lead paste with a content of 50% 4BS is formed, and the control time is 10 minutes to avoid excessive growth of 4BS crystal grains. The formed product was observed under a scanning electron microscope, as figure 1 ...
Embodiment 2
[0047] Select two different lead pastes and mix them at a ratio of 1:1. After assembling the battery, conduct a life comparison experiment and perform the following experiments.
[0048] A production of high content 4BS lead paste.
[0049] First, add 100Kg of lead powder into the vacuum paste machine, add 70g of fiber to the lead powder, dry stir for 3 minutes, add 12 liters of water, stir for another 3 minutes, then add acid, the specific gravity of the acid is 1.4, and the amount of acid is 10kg. Adjust the angle of the acid nozzle, control the acid addition time within 5 minutes, and set the highest temperature to 80 degrees, set the vacuum degree of the vacuum paste machine at 483.7mbar, and then keep it for 10 minutes during the stirring process, so that A lead paste with a content of 50% 4BS is formed, and the control time is 10 minutes to avoid excessive growth of 4BS crystal grains.
[0050] B contains additive Sb 2 o 3 or SnSO 4 Production of lead paste
[0051]...
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Abstract
The invention discloses a positive plate of a lead storage battery and a preparation method thereof, and belongs to the technical field of lead storage batteries. A lead paste raw material of the positive plate comprises lead powder, an additive, water and sulfuric acid; the additive comprises diantimony trioxide and stannous sulfate; the preparation of lead paste is completed in two parts: in the first part, the additive contains the diantimony trioxide and the stannous sulfate, the reaction temperature is controlled not to be greater than 50 DEG C, and first lead paste containing 3BS is prepared; in the second part, the two additives are not contained, the reaction temperature is controlled to be 80-85 DEG C, and second lead paste containing 4BS is prepared; the first lead paste and the second lead paste are physically mixed, so that an effective amount of 3BS and 4BS is simultaneously contained in the positive lead paste; meanwhile, the battery performance in terms of initial capacity and battery life is improved. The positive plate disclosed by the invention has the benefits that a medium temperature lead paste mixing and curing process is adopted, the conversion of the 4BS and the further particle size increase are avoided, the particle size and the content of the 4BS in the lead paste are effectively controlled, and the battery consistency is ensured.
Description
technical field [0001] The invention relates to the technical field of lead storage batteries, in particular to a positive plate of a lead storage battery and a preparation method thereof. Background technique [0002] The past ten years is the stage of rapid development of electric bicycles in China. So far, the number of electric bicycles has exceeded 200 million. Electric bicycle batteries have become one of the most important applications of lead-acid batteries. In the production process of lead-acid batteries, mixing paste is a key process of the battery process, and its quality directly affects the performance of the battery, especially the life of the battery and the initial performance of the battery, and the initial performance and life of the battery are directly related to the lead-acid battery. Consumer needs. [0003] With the continuous development of lead-acid battery technology, the preparation technology of lead paste, the key raw material for manufacturing...
Claims
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