Storage battery grid with refined alloy grains and manufacturing method thereof
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A grain refinement, battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as poor grid strength and corrosion resistance, and achieve the effects of improving corrosion resistance, delaying over-aging, and improving service life.
Active Publication Date: 2018-08-14
浙江天能汽车电池有限公司
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[0007] The object of the present invention is to provide a battery grid with refined alloy grains to overcome the problem of poor strength and corrosion resistance of the grid due to coarse casting of alloy grains in the prior art
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Embodiment 1
[0045] 1. Battery grid formula: tin Sn 1.2%; silver Ag 0.01%; strontium Sr 0.08%; lithium Li 0.03%; calcium Ca 0.03%; aluminum Al 0.03%; lanthanum La 0.03%; cerium Ce 0.03%; Antimony 0.05%, the balance is lead.
[0046] 2. Preparation method of battery grid
[0047] 2.1 Preparation of grid alloy ingot
[0048] (1) Add one-tenth of the lead in the formula quantity to the batching pot and heat it to 1000°C, add the formula quantity La and Ce, keep the temperature, then stir at 300r / min for 40 minutes, and then cool down naturally;
[0049] (2) Add Sr when the temperature of the alloy liquid drops to 800°C, and continue to stir for 20 minutes, and then continue to cool down;
[0050] (3) The temperature of the alloy liquid drops to 600°C, put out the mixer, then wrap the Ca and Al with tin foil in the formula amount, put it in a device similar to a bell jar and perforate it, and press the device on the bottom of the lower layer of the batching pot with an iron rod , after ther...
Embodiment 2
[0079] 1. Battery grid formula: tin Sn 0.6%; silver Ag 0.008%; strontium Sr 0.06%; lithium Li 0.04%; calcium Ca 0.05%; aluminum Al 0.04%; lanthanum La 0.05%; cerium Ce 0.02%; antimony Indium 0.03%, the balance is lead.
[0080] 2. Preparation method of battery grid
[0081] 2.1 Preparation of grid alloy ingot
[0082] (1) Add one-tenth of the lead in the formulation amount to the batching pot and heat it to 1050°C, add the formulation amount La and Ce, keep the temperature, then stir at 200r / min for 20 minutes, and then cool down naturally;
[0083] (2) Add Sr when the temperature of the alloy liquid drops to 850°C, and continue to stir for 20 minutes, and then continue to cool down;
[0084] (3) The temperature of the alloy liquid drops to 650°C, put out the mixer, then wrap the Ca and Al with tin foil in the formula amount, put it in a bell jar and perforate the appliance, and press the appliance on the bottom of the lower layer of the batching pot with an iron rod , afte...
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Abstract
The invention discloses a storage battery grid with refined alloy grains and a manufacturing method thereof, and belongs to the technical field of storage battery manufacturing. The storage battery grid adopts a lead-tin-silver-lanthanum-cerium alloy, furthermore, an antimonide is added, and the grains are refined, so that the corrosion resistance and strength of the alloy are improved, and the performance of a storage battery is improved. The manufacturing method comprises the steps that firstly, mutual melting is carried out on grain-changing agents which cannot be easily molten in combination with ultrasonic waves under the conditions of high temperature and high shearing and stirring, and then the mixture is mixed with a large amount of molten lead, so that the uniform mixing of the grain-changing agents is guaranteed, and segregation is avoided in the solidification process; an alternating magnetic field is applied in the ingot casting process, the changed magnetic field damages the solidification structure of the grains, and the grains are refined; and when the grid is cast, the magnetic field and the ultrasonic vibration are adopted at the same time, and the grains are further refined under the double action of the magnetic field and the vibration energy. By adopting the grain refining method, the high-temperature corrosion resistance of the manufactured grid is improvedby 60%, the capacity, the low temperature performance and the charging acceptance performance of the storage battery are improved and the service life of the storage battery is prolonged correspondingly to different degrees, and the service life is prolonged by 30% or more.
Description
technical field [0001] The invention relates to the technical field of battery manufacturing, in particular to a battery grid with refined alloy grains and a preparation method thereof. Background technique [0002] At present, lead-acid batteries are the mainstream of battery market demand, and plate performance is one of the main factors affecting battery life. As the most critical inactive part of the lead-acid battery, the grid plays the role of supporting the positive and negative active materials and acting as a current collector during charge and discharge, which requires the alloy used to make the grid to have excellent performance. Improving the corrosion resistance and strength of the grid can improve the life and electrical performance of the grid to a certain extent. In order to improve the corrosion resistance of the grid, lead alloys with various compositions have been proposed so far, such as lead-antimony or lead-calcium-tin alloys, However, often because th...
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