Method for rapidly forming crystal ribbon in polar plate

Abstract

The invention discloses a method for quickly forming a crystal ribbon in a polar plate, which comprises the following specific steps: step 1, preparing raw materials: selecting lead with the purity not lower than 99.9% as a base material, and adding a proper amount of alloy elements according to the performance of the required polar plate; step 2, casting and preliminary forming; 3, preheating treatment is conducted, specifically, the primarily-formed pole plate blank is put into a heat treatment furnace to be preheated; 4, crystal ribbon forming treatment, wherein a rapid thermal cycle treatment technology is adopted; and 5, post-treatment: carrying out surface treatment on the polar plate subjected to crystal ribbon forming treatment. Compared with a traditional method, the crystal ribbon forming time is shortened by 50%-70% through the innovative rapid thermal cycle treatment technology, the production efficiency is greatly improved, and the requirement for large-scale industrial production is met.

Description

A method for rapid formation of crystal zones in an electrode plate Technical Field

[0001] This invention relates to the field of electrode zone technology, specifically a method for rapidly forming a zone in an electrode. Background Technology

[0002] Lead-acid batteries are widely used in automotive starting and energy storage due to their advantages such as low cost, mature technology, and good high and low temperature performance. The electrode plates are the core component of lead-acid batteries, and their performance plays a decisive role in the overall battery performance. The crystalline zone plays a crucial role in the electrode plates; a good crystalline zone structure can significantly improve the conductivity, mechanical strength, and corrosion resistance of the electrode plates, thereby improving the battery's charge and discharge efficiency and cycle life.

[0003] Currently, traditional methods for forming electrode ribbons have many drawbacks. Some methods require lengthy heat treatment processes, which not only reduces production efficiency but also increases production costs. Other methods struggle to precisely control the ribbon formation process, leading to uneven ribbon structures, affecting the consistency of electrode performance, and consequently impacting the overall battery performance. Given the growing demand for high-performance lead-acid batteries, developing a method for rapidly and uniformly forming ribbons in the electrode has become a critical issue and a crucial factor for stability in lead-acid battery manufacturing. Summary of the Invention

[0004] The purpose of this invention is to provide a method for rapidly forming a crystal zone in an electrode plate. The specific steps of this method for rapidly forming a crystal zone in an electrode plate are as follows:

[0005] Step 1: Raw material preparation: Select lead with a purity of not less than 99.9% as the base material, and add appropriate amount of alloying elements according to the required electrode performance. The addition ratio of each alloying element is controlled between 0.01% and 2%. Put the prepared raw materials into a high-temperature furnace and heat them to 450℃-550℃ to completely melt them and obtain a uniform lead alloy melt for later use.

[0006] Step 2, Casting and Preliminary Shaping: Using gravity casting, molten lead alloy is injected into a mold of a specific shape and cooled to 150℃-200℃ to obtain a preliminarily shaped electrode blank.

[0007] Step 3, Preheating treatment: Place the pre-formed electrode blank into a heat treatment furnace for preheating treatment; heat to 250℃-350℃, hold for 1h-3h, and then cool to room temperature at a rate of 3℃ / min-8℃ / min. The purpose of preheating treatment is to eliminate the stress inside the blank and lay the foundation for the rapid formation of the subsequent crystal zone.

[0008] Step 4, Crystalline Formation Process: Using rapid thermal cycling technology, the preheated electrode blank is rapidly heated to 380℃-450℃ and held for 3min-8min. Then it is immediately placed in a coolant for rapid cooling. The coolant temperature is controlled at 20℃-30℃ and the cooling time is 1min-3min.

[0009] Step 5, Post-processing: Perform surface treatment on the electrode plates that have undergone the crystal zone formation process, such as polishing and cleaning, to remove impurities and oxide layers from the surface and improve the flatness and smoothness of the electrode plate surface.

[0010] Preferably, the alloying element is one or more of calcium, tin, and silver.

[0011] Preferably, the gravity casting process can also be a die casting process.

[0012] Preferably, in step 2, during the casting process, the cooling rate is controlled at 5℃ / min-15℃ / min to ensure the uniformity of the internal microstructure of the billet.

[0013] Preferably, in step 4, the rapid thermal cycling process requires repeated thermal cycling 3 to 5 times to form a uniformly distributed crystalline zone inside the electrode plate.

[0014] Preferably, in step 5, after the electrode plate undergoes surface treatment, performance testing is also performed, including crystal zone structure analysis, conductivity testing, and mechanical strength testing, to ensure that the electrode plate performance meets the requirements.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. Rapid ribbon formation: Through innovative rapid thermal cycling technology, the ribbon formation time is reduced by 50%-70% compared to traditional methods, greatly improving production efficiency and meeting the needs of large-scale industrial production.

[0017] 2. Uniform crystal structure: Precise control of parameters such as temperature, time and cooling rate during thermal cycling can ensure that the crystals are evenly distributed inside the electrode, improving the consistency of electrode performance and thus enhancing the overall stability of battery performance.

[0018] 3. Improved plate performance: The uniform crystalline zone structure significantly enhances the conductivity, mechanical strength and corrosion resistance of the plates, improving the charge and discharge efficiency of the battery by 15%-25% and extending the cycle life by 20%-30%.

[0019] 4. Reduced production costs: Shortened crystal formation time and improved production efficiency reduce energy consumption and equipment downtime, thereby lowering production costs and enhancing the market competitiveness of products. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] Example 1

[0022] 1. Raw material preparation: Select lead with a purity of 99.95%, and add 0.05% calcium, 0.5% tin and 0.01% silver. Place the raw materials in a high-temperature furnace and heat to 500℃ to melt them, obtaining a lead alloy molten liquid.

[0023] 2. Casting and preliminary forming: Using gravity casting, molten lead alloy is injected into a mold and cooled to 180°C at a cooling rate of 10°C / min to obtain the electrode plate blank.

[0024] 3. Preheating treatment: Place the plate blank into a heat treatment furnace, heat it to 300℃, hold it for 2 hours, and then cool it to room temperature at a rate of 5℃ / min.

[0025] 4. Crystalline formation treatment: Perform rapid thermal cycling treatment, heating to 420℃ each time, holding for 5 minutes, and then cooling in a 25℃ coolant for 2 minutes, repeating 4 times.

[0026] 5. Post-processing: The electrode plates are polished and cleaned to remove surface impurities and oxide layers, followed by performance testing. Testing revealed a uniform crystal band structure, a 20% increase in electrode plate conductivity, a 25% increase in mechanical strength, and significantly enhanced corrosion resistance.

[0027] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for rapidly forming a crystal zone in an electrode, characterized in that: The specific steps of the method for rapidly forming crystal zones in this electrode plate are as follows: Step 1, Raw material preparation: Select lead with a purity of not less than 99.9% as the base material, and add appropriate amounts of alloying elements according to the required electrode plate performance. The addition ratio of each alloying element is controlled between 0.01% and 2%. Place the prepared raw materials into a high-temperature furnace and heat to 450℃-550℃ to completely melt them, obtaining a uniform lead alloy melt for later use; Step 2, Casting and preliminary forming: Using gravity casting technology, inject the lead alloy melt into a mold of a specific shape, cool to 150℃-200℃, and obtain a preliminary formed electrode plate blank; Step 3, Preheating treatment: Place the preliminary formed electrode plate blank into a heat treatment furnace for preheating treatment; heat to 2 The preheating process involves heating the preheated electrode blank to 380℃-450℃ for 1-3 hours, then cooling it to room temperature at a rate of 3℃ / min-8℃ / min. The purpose of this preheating is to eliminate internal stress in the blank and lay the foundation for rapid formation of the subsequent crystal zone. Step 4: Crystal zone formation treatment: Using rapid thermal cycling technology, the preheated electrode blank is rapidly heated to 380℃-450℃ and held for 3-8 minutes. Then, it is immediately placed in a cooling liquid for rapid cooling. The temperature of the cooling liquid is controlled at 20℃-30℃, and the cooling time is 1-3 minutes. Step 5: Post-treatment: The electrode blank that has undergone crystal zone formation treatment is subjected to surface treatment, such as grinding and cleaning, to remove impurities and oxide layers from the surface and improve the flatness and smoothness of the electrode surface.

2. The method for rapidly forming a crystal zone in an electrode according to claim 1, characterized in that: The alloying element is one or more of calcium, tin, and silver.

3. The method for rapidly forming a crystal zone in an electrode according to claim 1, characterized in that: The gravity casting process can also be a die casting process.

4. The method for rapidly forming a crystal zone in an electrode according to claim 1, characterized in that: In step 2, during the casting process, the cooling rate is controlled at 5℃ / min-15℃ / min to ensure the uniformity of the internal microstructure of the billet.

5. The method for rapidly forming a crystal zone in an electrode according to claim 1, characterized in that: In step 4, the rapid thermal cycling process requires repeated thermal cycling 3 to 5 times to form a uniformly distributed crystalline zone inside the electrode plate.

6. The method for rapidly forming a crystal zone in an electrode according to claim 1, characterized in that: In step 5, after the electrode plate undergoes surface treatment, performance testing is also required, including crystal zone structure analysis, conductivity testing, and mechanical strength testing, to ensure that the electrode plate performance meets the requirements.