A method for preparing battery poles by narrow strip continuous casting

Abstract

The invention relates to the technical field of battery pole preparation, and specifically discloses a method for preparing battery poles by narrow strip continuous casting, comprising: preparing copper-aluminum composite materials, rolling, roller rolling, molding and stamping; wherein rolling comprises: rolling the prepared copper-aluminum composite materials, and testing the rolled materials to determine whether the rolled materials are qualified, and obtaining area parameters to determine whether the target environment will affect the qualified rate of material rolling, and obtaining area characterization values, so as to analyze the target environment range in which the qualified rate of the rolled materials is high; the invention further analyzes the target environment range in which the qualified rate of the rolled materials is high, which is helpful to determine the optimal rolling conditions, improve the qualified rate of the materials, thereby bringing greater economic benefits to the enterprises, and at the same time, it is also helpful to promote the progress of material processing technology and promote the development of related industries.

Description

Technical Field

[0001] The invention relates to the technical field of battery pole preparation, and in particular to a method for preparing battery poles by narrow strip continuous casting. Background Art

[0002] Battery terminals are metal columns that connect the positive and negative poles in the battery. They are also one of the most important components of the battery. They carry current and energy and transmit them to external devices or chargers. The material of the battery terminal is usually copper, nickel, aluminum and other metals with good conductivity to ensure the smooth flow of current. Its size and shape will vary depending on the type and purpose of the battery.

[0003] A Chinese invention patent with publication number CN101540387A discloses a method for preparing a composite pole for a lithium battery, which is characterized by comprising: determining a composite ratio of two materials; removing surface oxides; a scraping process; tightly fitting to form a material rod and extruding it; annealing the extruded material rod; repeating the extrusion process until the size required for the cold drawing process is reached; repeating the annealing process; and performing multiple cold drawing processes to obtain a composite pole.

[0004] However, in the existing technology, during the rolling process of copper-aluminum composite materials, the impact of environmental factors on material properties is highly ambiguous, making it difficult to optimize the rolling process. There is also a lack of systematic strategies to improve the material qualification rate, which makes it difficult for companies to reduce production costs. Summary of the invention

[0005] The object of the present invention is to provide a method for preparing battery poles by narrow strip continuous casting to solve the technical problems in the above background.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A method for preparing a battery pole by narrow strip continuous casting, comprising: preparing a copper-aluminum composite material, rolling, rolling, molding, and stamping;

[0008] Among them, rolling includes: rolling the prepared copper-aluminum composite material, and testing the rolled material to determine whether the rolled material is qualified, and obtaining area parameters, determining whether the target environment will affect the qualified rate of the material rolling, and obtaining the area characterization value MB, so as to analyze the target environment range in which the qualified rate of the rolled material is high;

[0009] Obtain the proportion of qualified materials among all materials after rolling under different target environments;

[0010] According to the proportion of qualified materials in all rolled materials under different target environments, draw a target environment and qualified proportion analysis chart;

[0011] Based on the target environment and the qualified ratio analysis chart, the target environment is divided into multiple intervals according to the numerical value, and the area enclosed between each interval polyline and the target environment is calculated respectively. The ratio of this area to the area threshold is the area representation value MB;

[0012] The area characterization value threshold is preset as MZ, and the area characterization value MB is compared and analyzed with the area characterization value threshold MZ;

[0013] If the area characterization value MB≥the area characterization value threshold value MZ, it means that the target environment during the rolling of the material is in the range and the qualified rate of the material after rolling is high.

[0014] As a further solution of the present invention: the method for judging whether the rolled material is qualified is:

[0015] Test the rolled material to obtain collected data, and calculate the collected parameters based on the collected data to determine whether the rolled material is qualified;

[0016] The collected data include: thickness characterization value, texture characterization value, and bonding strength characterization value.

[0017] As a further solution of the present invention: the method for obtaining the thickness characterization value is:

[0018] The thickness of the material after rolling is obtained, and the difference between the thickness of the material after rolling and the required thickness of the pole part is calculated. The ratio of the obtained difference to the thickness threshold is the thickness characterization value, and the thickness characterization value is marked as HD.

[0019] As a further solution of the present invention: the method for obtaining the texture characterization value is:

[0020] The defect area on the rolled material is measured, and the sum of the areas of all defect areas is obtained. The ratio of the sum of the areas to the area threshold is the texture characterization value, and the texture characterization value is marked as ZD.

[0021] As a further solution of the present invention: the method for obtaining the binding force characterization value is:

[0022] The rolled material is measured to obtain the peeling force of the rolled material. The ratio of the peeling force of the rolled material to the peeling force of the optimal rolled material is the bonding force characterization value, and the bonding force characterization value is marked as JH.

[0023] As a further solution of the present invention: the calculation method of the acquisition parameters is:

[0024] The thickness characterization value HD, texture characterization value ZD, and bonding force characterization value JH are processed by the formula: JC = a 1 ×HD 2 +a 2×ZD+a 3 ×(1-JH) 2 , calculate the acquisition parameter JC, where a 1 、a 2 、a 3 are preset scaling factors, and are all greater than 0.

[0025] As a further solution of the present invention: the method for judging whether the rolled material is qualified according to the collected parameters is:

[0026] The acquisition parameter threshold is preset as JCY, and the acquisition parameter JC is compared and analyzed with the acquisition parameter threshold JCY;

[0027] If the acquisition parameter JC ≤ the acquisition parameter threshold JCY, the material after rolling is judged to be qualified;

[0028] If the acquisition parameter JC> the acquisition parameter threshold JCY, the rolled material is judged to be unqualified.

[0029] As a further solution of the present invention: the method for obtaining the area parameter is:

[0030] B1: Change the target environment during material rolling to obtain acquisition parameters under different target environments;

[0031] B2: Draw the target environment and acquisition parameter analysis diagram according to the acquisition parameters under different target environments, and mark the straight line between each two adjacent points as a sub-line, obtain the area of ​​the area enclosed by each sub-line and the target environment axis, and mark the area of ​​the enclosed area as MJ n , where n represents the area enclosed between the nth sub-polyline and the target environment axis, and n is a positive integer;

[0032] B3: Calculate the area parameters based on the area enclosed by all the sub-polylines;

[0033] By formula: Calculate and obtain the area parameter YX.

[0034] As a further solution of the present invention: the method for judging whether the target environment will affect the qualified rate of material rolling is:

[0035] The area parameter threshold is preset to YZ, and the area parameter YX is compared and analyzed with the area parameter threshold YZ;

[0036] If the area parameter YX is less than the area parameter threshold YZ, it is determined that the change in the target environment during material rolling has no effect on the qualified rate of the material after rolling;

[0037] If the area parameter YX ≥ the area parameter threshold YZ, it is determined that the change in the target environment during the rolling of the material has an impact on the qualified rate of the material after rolling.

[0038] As a further embodiment of the present invention:

[0039] Compare and analyze the area characterization value MB with the area characterization value threshold MZ;

[0040] If the area characterization value MB is less than the area characterization value threshold value MZ, it means that the target environment during the rolling of the material is in the range and the qualified rate of the material after rolling is low.

[0041] Beneficial effects of the present invention:

[0042] (1) The present invention determines whether the material is qualified by testing the rolled material, which ensures that the produced copper-aluminum composite material meets the predetermined quality requirements. This quality control mechanism helps to reduce the generation of defective products, improve production efficiency, and reduce production costs;

[0043] (2) By obtaining the area characterization value, the present invention can further analyze the target environmental range in which the qualified rate of the material after rolling is high, which helps to determine the optimal rolling conditions and improve the qualified rate of the material, thereby bringing greater economic benefits to the enterprise. At the same time, it also helps to promote the advancement of material processing technology and promote the development of related industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The present invention will be further described below in conjunction with the accompanying drawings.

[0045] Figure 1 is a flow chart of the method of the present invention;

[0046] Figure 2 It is a flow chart of the method for judging whether the rolled material is qualified in the present invention;

[0047] Figure 3 It is a flow chart of a method for judging whether a target environment will affect the qualified rate of material rolling in the present invention;

[0048] Figure 4 It is a flow chart of a method for analyzing a target environment range in which the qualified rate of materials after rolling is high in the present invention;

[0049] Figure 5 It is a flow chart for preparing the product of the present invention. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] See also Figure 1 - Figure 4 As shown, the present invention is a method for preparing a battery pole by narrow strip continuous casting, comprising the following steps:

[0052] Step 1: preparing a copper-aluminum composite material; using a continuous casting process, melting the raw materials, and then continuously casting the copper-aluminum composite material into a narrow strip through a continuous casting machine;

[0053] Raw materials include: copper, aluminum;

[0054] Step 2: rolling: rolling the prepared copper-aluminum composite material, and testing the rolled material to determine whether the rolled material is qualified, and analyzing the target environment range in which the qualified rate of the rolled material is high;

[0055] The target environment includes but is not limited to: ambient temperature, ambient humidity;

[0056] A: Test the rolled material to obtain collected data, and calculate the collected parameters based on the collected data to determine whether the rolled material is qualified;

[0057] The collected data include: thickness characterization value, texture characterization value, and bonding force characterization value;

[0058] A1: Test the rolled material and obtain the collected data;

[0059] A11: The thickness of the rolled material is measured to obtain the thickness of the rolled material, and the difference between the thickness of the rolled material and the required thickness of the pole part is calculated. The ratio of the obtained difference to the thickness threshold is the thickness characterization value, and the thickness characterization value is marked as HD;

[0060] It should be noted that the thickness of the material after rolling must exceed the thickness of the required pole parts. For example, for a 3.8mm thick pole, the thickness after rolling should be between 4-5mm. The rolling temperature is: 300℃, so that the deformation of the composite material reaches 65% and the peeling force reaches 100N / mm.

[0061] A12: Measure the defect area on the rolled material and obtain the sum of all defect areas. The ratio of the sum to the area threshold is the texture characterization value, and the texture characterization value is marked as ZD.

[0062] Among them, defect areas include: cracks, bubbles, inclusions, scratches, and depressions;

[0063] A13: The peeling force of the rolled material is measured by a peeling force tester to obtain the peeling force of the rolled material. The ratio of the peeling force of the rolled material to the peeling force of the optimal rolled material is the bonding force characterization value, and the bonding force characterization value is marked as JH;

[0064] A2: Calculate acquisition parameters based on the acquired data;

[0065] The thickness characterization value HD, texture characterization value ZD, and bonding force characterization value JH are processed by the formula: JC = a 1 ×HD 2 +a 2 ×ZD+a 3 ×(1-JH) 2 , calculate the acquisition parameter JC, where a 1 、a 2 、a 3 are preset scaling factors, and are all greater than 0;

[0066] A3: Compare and analyze the collected parameters to determine whether the rolled material is qualified;

[0067] The acquisition parameter threshold is preset as JCY, and the acquisition parameter JC is compared and analyzed with the acquisition parameter threshold JCY;

[0068] If the acquisition parameter JC ≤ the acquisition parameter threshold JCY, the material after rolling is judged to be qualified;

[0069] If the acquisition parameter JC> the acquisition parameter threshold JCY, the rolled material is judged as unqualified;

[0070] B: Analyze whether the change of the target environment during material rolling has an impact on the qualified rate of the material after rolling;

[0071] B1: Change the target environment during material rolling to obtain acquisition parameters under different target environments;

[0072] B2: Draw the target environment and acquisition parameter analysis diagram according to the acquisition parameters under different target environments, and mark the straight line between each two adjacent points as a sub-line, obtain the area of ​​the area enclosed by each sub-line and the target environment axis, and mark the area of ​​the enclosed area as MJ n , where n represents the area enclosed between the nth sub-polyline and the target environment axis, and n is a positive integer;

[0073] B3: Calculate the area parameters based on the area enclosed by all the sub-polylines;

[0074] By formula: Calculate and obtain area parameter YX;

[0075] B4: Compare and analyze the area parameters to determine whether the change of the target environment during material rolling has an impact on the qualified rate of the material after rolling;

[0076] The area parameter threshold is preset to YZ, and the area parameter YX is compared and analyzed with the area parameter threshold YZ;

[0077] If the area parameter YX is less than the area parameter threshold YZ, it is determined that the change in the target environment during material rolling has no effect on the qualified rate of the material after rolling;

[0078] If the area parameter YX ≥ the area parameter threshold YZ, it is determined that the change in the target environment during material rolling has an impact on the qualified rate of the material after rolling;

[0079] C: Based on the fact that the change of the target environment during material rolling has an impact on the qualified rate of the material after rolling, the target environment range with a high qualified rate of the material after rolling is analyzed;

[0080] C1: The proportion of qualified materials in all rolled materials under different target environments when obtaining materials;

[0081] C2: Draw a target environment and qualified ratio analysis chart based on the ratio of qualified quantity of all materials after rolling under different target environments;

[0082] C3: Based on the target environment and the qualified ratio analysis chart, the target environment is divided into multiple intervals according to the numerical value, and the area enclosed by each interval polyline and the target environment is calculated respectively. The ratio of this area to the area threshold is the area representation value, and the area representation value is marked as MB;

[0083] C4: Compare and analyze the area characterization values ​​to analyze the target environment range with high material qualification rate after rolling;

[0084] The area characterization value threshold is preset as MZ, and the area characterization value MB is compared and analyzed with the area characterization value threshold MZ;

[0085] If the area characterization value MB is less than the area characterization value threshold value MZ, it means that when the target environment is in this interval during the material rolling process, the qualified proportion of the rolled material is not high, that is, the qualified rate of the rolled material when the target environment is in this interval during the material rolling process is low;

[0086] If the area characterization value MB ≥ the area characterization value threshold value MZ, it means that when the target environment is in this interval during the material rolling process, the qualified proportion of the rolled material is high, that is, it is determined that the qualified rate of the rolled material when the target environment is in this interval during the material rolling is high, that is, the target environment interval with a high qualified rate of all rolled materials is the target environment range with a high qualified rate of the rolled materials;

[0087] Step 3: Rolling: Rolling the rolled material through a forming roller to form a pole aluminum boss;

[0088] Rolling includes: cold rolling and warm rolling, wherein the warm rolling temperature is: 400°C, so that the stripping force reaches 110N / mm;

[0089] Step 4: Molding: The roll-formed pole is molded at room temperature to further fine-tune the forming of the small features of the boss and the shaping of the large boss;

[0090] Step 5: Stamping: Stamp out the molded pole to obtain a finished battery pole that meets the requirements.

[0091] Working principle of the present invention:

[0092] Step 1: preparing copper-aluminum composite material;

[0093] Step 2: Rolling:

[0094] A: Test the rolled material to obtain collected data, and calculate the collected parameters based on the collected data to determine whether the rolled material is qualified;

[0095] A1: Test the rolled material and obtain the collected data;

[0096] A2: Calculate acquisition parameters based on the acquired data;

[0097] A3: Compare and analyze the collected parameters to determine whether the rolled material is qualified;

[0098] B: Analyze whether the change of the target environment during material rolling has an impact on the qualified rate of the material after rolling;

[0099] B1: Obtain acquisition parameters under different target environments;

[0100] B2: Draw the target environment and acquisition parameter analysis diagram according to the acquisition parameters under different target environments, and obtain the area enclosed by all the sub-polylines;

[0101] B3: Calculate the area parameters based on the area enclosed by all the sub-polylines;

[0102] B4: Compare and analyze the area parameters to determine whether the change of the target environment during material rolling has an impact on the qualified rate of the material after rolling;

[0103] C: Based on the fact that the change of the target environment during material rolling has an impact on the qualified rate of the material after rolling, the target environment range with a high qualified rate of the material after rolling is analyzed;

[0104] C1: The proportion of qualified materials in all rolled materials under different target environments when obtaining materials;

[0105] C2: According to the proportion of qualified materials in all materials after rolling under different target environments, draw the target environment and qualified proportion analysis chart, and obtain the area representation value;

[0106] C3: Compare and analyze the area characterization values ​​to analyze the target environment range where the qualified rate of the material after rolling is high;

[0107] Step 3: rolling;

[0108] Step 4: Molding;

[0109] Step 5: Stamping.

[0110] The above thresholds are set for the convenience of comparison. The thresholds depend on the amount of sample data and the number of bases set by technicians in this field for each set of sample data.

[0111] The above formulas are obtained by collecting a large amount of data and performing software simulation to select a formula close to the actual value. The factors in the formula are set by technicians in this field according to the actual situation; for example: Formula JC = a 1 ×HD 2 +a 2 ×ZD+a 3 ×(1-JH) 2 ; A technician in this field collects multiple sets of collected data and sets corresponding collection parameters for each set of collected data; Substitute the set collection parameters and the collected data into the formula, any three formulas form a three-variable linear equation system, screen the calculated factors and take the average, and obtain a 1 、a 2 、a 3 The values ​​of are 3.47, 2.65 and 2.23 respectively;

[0112] The size of the factor is to quantify each parameter to obtain a specific value for subsequent comparison. The size of the factor depends on the amount of collected data and the initial setting of corresponding collection parameters for each group of collected data by technical personnel in this field; as long as it is not a proportional relationship between the area parameter and the quantized value, such as the collection parameter is proportional to the value of the thickness characterization value.

[0113] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for preparing battery poles by narrow strip continuous casting, characterized in that: include: Preparation of copper-aluminum composite materials, rolling, roller-forming, molding, and stamping; Among them, rolling includes: rolling the prepared copper-aluminum composite material, and testing the rolled material to determine whether the rolled material is qualified, and obtaining area parameters, determining whether the target environment will affect the qualified rate of the material rolling, and obtaining the area characterization value MB, so as to analyze the target environment range in which the qualified rate of the rolled material is high; The method for obtaining the area parameter is: B1: Change the target environment during material rolling to obtain acquisition parameters under different target environments; B2: Draw the target environment and acquisition parameter analysis diagram according to the acquisition parameters under different target environments, and mark the straight line between each two adjacent points as a sub-line, obtain the area of ​​the area enclosed by each sub-line and the target environment axis, and mark the area of ​​the enclosed area as MJ n , where n represents the area enclosed between the nth sub-polyline and the target environment axis, and n is a positive integer; B3: Calculate the area parameters based on the area enclosed by all the sub-polylines; By formula: Calculate and obtain area parameter YX; Obtain the proportion of qualified materials among all materials after rolling under different target environments; According to the proportion of qualified materials in all rolled materials under different target environments, draw a target environment and qualified proportion analysis chart; Based on the target environment and the qualified ratio analysis chart, the target environment is divided into multiple intervals according to the numerical value, and the area enclosed between each interval polyline and the target environment is calculated respectively. The ratio of this area to the area threshold is the area representation value MB; The area characterization value threshold is preset as MZ, and the area characterization value MB is compared and analyzed with the area characterization value threshold MZ; If the area characterization value MB ≥ the area characterization value threshold value MZ, it means that the qualified rate of the material after rolling is high when the target environment is in the range during the rolling of the material; If the area characterization value MB is less than the area characterization value threshold value MZ, it means that the qualified rate of the material after rolling is low when the target environment is in the range during the rolling of the material; The method for judging whether the rolled material is qualified is as follows: Test the rolled material to obtain collected data, and calculate the collected parameters based on the collected data to determine whether the rolled material is qualified; The collected data include: thickness characterization value, texture characterization value, and bonding force characterization value; The method for obtaining the thickness characterization value is: The thickness of the material after rolling is obtained, and the difference between the thickness of the material after rolling and the required thickness of the pole part is calculated. The ratio of the obtained difference to the thickness threshold is the thickness characterization value, and the thickness characterization value is marked as HD; The method for obtaining the texture characterization value is: The defect area on the rolled material is measured, and the sum of the areas of all defect areas is obtained. The ratio of the sum of the areas to the area threshold is the texture characterization value, and the texture characterization value is marked as ZD; The method for obtaining the binding force characterization value is: The rolled material is measured to obtain the peeling force of the rolled material. The ratio of the peeling force of the rolled material to the peeling force of the optimal rolled material is the bonding force characterization value, and the bonding force characterization value is marked as JH. The thickness characterization value HD, texture characterization value ZD, and bonding force characterization value JH are processed by the formula: JC = a1 × HD 2 +a2×ZD+a3×(1-JH) 2 , the acquisition parameter JC is calculated, where a1, a2, and a3 are preset proportional factors, and all are greater than 0.

2. The method for preparing battery poles by narrow strip continuous casting according to claim 1, characterized in that: The acquisition parameter threshold is preset as JCY, and the acquisition parameter JC is compared and analyzed with the acquisition parameter threshold JCY; If the acquisition parameter JC ≤ the acquisition parameter threshold JCY, the material after rolling is judged to be qualified; If the acquisition parameter JC> the acquisition parameter threshold JCY, the rolled material is judged to be unqualified.

3. The method for preparing battery poles by narrow strip continuous casting according to claim 2, characterized in that: The area parameter threshold is preset to YZ, and the area parameter YX is compared and analyzed with the area parameter threshold YZ; If the area parameter YX is less than the area parameter threshold YZ, it is determined that the change in the target environment during material rolling has no effect on the qualified rate of the material after rolling; If the area parameter YX ≥ the area parameter threshold YZ, it is determined that the change in the target environment during the rolling of the material has an impact on the qualified rate of the material after rolling.

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