Cylindrical battery collector plate welding method

Abstract

The invention discloses a cylindrical battery collector plate welding method, and relates to the technical field of new energy batteries, the welding method comprises the following steps: optimizing welding parameters based on a genetic algorithm, finding out an optimal welding parameter combination, and adopting the current welding parameter combination for welding treatment; on the basis of a path planning algorithm, a path in the welding process is planned and set, and the collector plate moves according to a preset path during welding; the positive plate, the negative plate and the diaphragm are wound to form a roll core; the upper end of the roll core is provided with an upper tab, and the lower end of the roll core is provided with a lower tab which is welded with the upper and lower collector plates. After dissimilation, the overflowing area is effectively increased; a relatively large effective overflowing area can still be ensured under the condition of avoiding the inner side and the outer side; and the optimal welding parameter combination can be found for welding, the optimal welding path is found for moving, and better use prospects are brought.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy batteries, and in particular to a welding method for a cylindrical battery collector plate. Background Art

[0002] In order to improve the rate performance, large cylindrical batteries adopt a full-ear design, and the ear and the current collecting plate are tightly connected through continuous laser welding. There are two commonly used welding methods: one is pulse welding, and the welding trajectory is composed of multiple continuous points. This welding method has a large thermal impact and is easy to burn the diaphragm and cause a short circuit. Therefore, the thickness of the tab needs to be flattened to achieve a relatively stable welding effect. At present, the flattening process of the full-tab battery has been gradually replaced by the stacking process, so pulse welding has also been gradually replaced. The other is continuous welding, and the welding trajectory is mostly a spiral line or a sine line obtained by software alienation from the straight line radiating outward from the center of the circular collector. However, this welding method has a limited effective welding area on the circular collector, and cannot fully utilize the weldable area of ​​the collector, and cannot achieve a major breakthrough in reducing the internal resistance of the battery. At the same time, the welding density of the inner ring pole piece of the winding core is higher, while the welding density of the outer ring pole piece is lower, resulting in a large difference in the electron transmission distance between the inner and outer ring pole pieces of the winding core, which causes uneven current distribution of the inner and outer ring pole pieces, resulting in deterioration of the performance of the outer ring pole piece of the battery. In this regard, we propose a cylindrical battery collector welding method. Summary of the invention

[0003] In order to solve the above technical problems, a cylindrical battery collector plate welding method is provided. This technical solution solves the above problems.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is: a welding method for a cylindrical battery collector plate, the welding method is:

[0005] Optimize welding parameters based on genetic algorithm, find the best welding parameter combination, and use the current welding parameter combination for welding;

[0006] Based on the path planning algorithm, the path in the welding process is planned and set, so that the collector plate moves along the predetermined path during welding;

[0007] The positive and negative electrode sheets and the separator are wound to form a winding core, and the separator separates the positive and negative electrodes to prevent short circuit;

[0008] An upper pole ear is arranged at the upper end of the winding core, and a lower pole ear is arranged at the lower end of the winding core, and the upper and lower pole ears are welded to the upper and lower current collecting plates;

[0009] The pole piece and the pole ear of the winding cross section are distributed as Archimedean spirals, and the welding trajectory is the Archimedean spiral, which is then transformed into a sine line. The spiral pitch when drawing the Archimedean spiral is a multiple of the pole ear distribution pitch, so as to ensure that after welding, the pole ear in each area has a similar weld bead to connect the pole ear to the collector plate;

[0010] When the sine line is transformed, the amplitude is set smaller than the spiral pitch of the Archimedean spiral, and the period is set based on the inner lines not crossing each other.

[0011] Holes are reserved on the collector plate to allow the electrolyte to enter the core. The welding power and time waveform is accurately set to each section of light emission and non-light emission time, so that the actual light emission power is zero at the hole position, and the collector plate is welded.

[0012] Preferably, the winding is carried out by inspecting the positive and negative electrode sheets and the separator raw materials, accurately cutting the positive and negative electrode sheets according to predetermined sizes, and also cutting the separator into corresponding sizes for use with the positive and negative electrode sheets. The negative electrode sheet is placed on the central axis of the winding machine, and a layer of separator is covered on the negative electrode sheet, and then the positive electrode sheet is covered thereon to form a "negative electrode-diaphragm-positive electrode" stacked structure, and the alternation continues until the required number of layers or thickness is reached, and the stacked materials are tightly wound into a cylindrical or square core. After the winding is completed, the core is fixed with finishing tape.

[0013] Preferably, a microporous channel is designed inside the diaphragm, and ions in the electrolyte freely shuttle through the microporous channel, and the pore size of the microporous channel is less than 1 μm.

[0014] Preferably, the genetic algorithm encodes the welding parameters as chromosomes, and performs iterative optimization through selection, crossover and mutation to find the optimal welding parameter combination. The optimization step predetermines the welding optimization goal, and the optimization goals include maximizing welding intensity, laser power and welding speed. A welding parameter combination is randomly generated as the initial population, and a fitness function is designed according to the target. The advantages and disadvantages of each group of generated parameter combinations are evaluated, and the fitness value is calculated, and crossover and mutation operations are performed. Finally, repeated evaluation, selection, crossover and mutation operations are performed, and iterative optimization is performed, and the optimal parameter combination is finally output.

[0015] Preferably, the fitness function is:

[0016] F(x)=max[0,Cf(x)]

[0017] Where F(x) is the fitness function, C is a constant, and f(x) is the functional combination of welding parameters;

[0018] The crossover operation is calculated using the arithmetic crossover method. For two welding parameter individuals Z1 and Z2, and a random number a, the arithmetic crossover is expressed as:

[0019] B1=a*Z1+(1-a)*Z2

[0020] B2=a*Z2+(1-a)*Z1

[0021] Among them, B1 is the first offspring, B2 is the second offspring, a is a random number with a value range of 0≤a≤1, and the formula generates new offspring individuals through weighting.

[0022] Preferably, the mutation operation is performed using binary mutation. The mutation operation is to perform binary inversion on the chromosome, changing the 0 on the selected gene position to 1. The mutation step is to determine the probability of mutation, which is between 0.001 and 0.1. The individual welding parameters of the mutation are selected, and the selection is based on the random number a. The mutation position is determined, the mutation operation is performed, and new parameters are generated to verify the new welding parameters to see if it is the optimal welding parameter combination. If not, the repeated iterative optimization is continued. If so, the output is performed.

[0023] Preferably, the path planning algorithm is processed by a particle swarm optimization algorithm, and the processing steps are to predetermine each existing welding path, assign an initial position and speed to each welding path, perform iterative optimization, and update the speed and position of the welding path. The update formula is:

[0024] V=w 1 *v 1 +d 1 *r 1 (pB-g 1 )+d 2 *r 2 *(gB-g 1 )

[0025] Where V is the updated output, v 1 With g 1 It is divided into the speed and position of the ion, w is the weight of inertia, d 1 With d 2 are learning factors, r 1 With r 2 are random numbers, pB is the individual optimal solution of the welding path, gB is the global optimal solution. The optimal path in the welding process is obtained by the formula, and the welding movement is performed according to the path.

[0026] Preferably, the Archimedean spiral definition equation is:

[0027] O=e+hn

[0028] Where O is the radius distance from the origin to the curve, e and h are constants, controlling the starting radius and pitch of the spiral respectively, and n is the angle between the point and the x-axis;

[0029] The alienated sine line introduces a sinusoidal wave on the radius of the spiral and modifies the formula to:

[0030] r'=(e+hn)+ksin*(jn+m)

[0031] Among them, k is the amplitude of the controlled fluctuation, j is the frequency of the controlled fluctuation, and m is the phase shift. The Archimedean spiral is alienated through the formula.

[0032] Preferably, a real-time monitoring and feedback mechanism is introduced during the welding process to detect the quality of welding in real time. If abnormal welding is found, welding is stopped immediately and welding parameters are adjusted.

[0033] Preferably, the holes of the collecting plate are processed by a punching machine, and after the punching is completed, the outer surface is deburred.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The present invention uses a circular current collecting disk of the same area as the limit to draw an Archimedean spiral with a longer line length than that of a straight line, and the flow area is effectively increased after alienation; the welding trajectory is consistent with the distribution of the pole ears on the end face of the battery, and the electron transmission distance of the pole piece is equal, while the electron transmission distance is reduced, so that the battery rate performance is effectively improved; this welding method has guaranteed consistency in penetration depth and is compatible with both flattened and stacked cores; there is a difference in the thickness of the pole ears of the stacked core, and the thickness of the pole ears close to the inside and outside of the core will be thinner than that in the middle, so that a larger effective flow area can be guaranteed while avoiding the inside and outside; and the optimal welding parameter combination can be found for welding, and the best welding path can be found for movement, bringing better prospects for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic cross-sectional view of a winding core of the present invention;

[0037] Figure 2 It is a schematic diagram of the stacked and cut core electrode ear of the present invention;

[0038] Figure 3 A top view of the comparative weld distribution of the present invention;

[0039] Figure 4 This is a cross-sectional view of the comparative weld distribution of the present invention;

[0040] Figure 5 A top view of a preset weld bead of a current collecting plate according to an embodiment of the present invention;

[0041] Figure 6 This is a cross-sectional view of the weld distribution according to an embodiment of the present invention. DETAILED DESCRIPTION

[0042] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0043] Reference Figure 1 and Figure 2 As shown, a cylindrical battery collector plate welding method, the welding method is:

[0044] Optimize welding parameters based on genetic algorithm, find the best welding parameter combination, and use the current welding parameter combination for welding;

[0045] Based on the path planning algorithm, the path in the welding process is planned and set, so that the collector plate moves along the predetermined path during welding;

[0046] The positive and negative electrode sheets and the separator are wound to form a winding core, and the separator separates the positive and negative electrodes to prevent short circuit;

[0047] An upper pole ear is arranged at the upper end of the winding core, and a lower pole ear is arranged at the lower end of the winding core, and the upper and lower pole ears are welded to the upper and lower current collecting plates;

[0048] The pole piece and the pole ear of the winding cross section are distributed as Archimedean spirals, and the welding trajectory is the Archimedean spiral, which is then transformed into a sine line. The spiral pitch when drawing the Archimedean spiral is a multiple of the pole ear distribution pitch, so as to ensure that after welding, the pole ear in each area has a similar weld bead to connect the pole ear to the collector plate;

[0049] When the sine line is transformed, the amplitude is set smaller than the spiral pitch of the Archimedean spiral, and the period is set based on the inner lines not crossing each other.

[0050] Holes are reserved on the collector plate to allow the electrolyte to enter the core. The welding power and time waveform is accurately set to each section of light emission and non-light emission time, so that the actual light emission power is zero at the hole position, and the collector plate is welded.

[0051] This application optimizes welding parameters through genetic algorithms to find the parameter combination that best suits the current materials and process conditions, thereby improving the strength and reliability of the welded joints. The optimized welding parameters can reduce energy waste and material loss during welding, thereby reducing production costs. The path planning algorithm can ensure that the welding head moves accurately along a predetermined path to avoid offset and errors during welding. The design of the Archimedean spiral makes the distribution of the pole ears on the winding core more even, and the weld bead also follows the same spiral trajectory to ensure that each pole ear can obtain a similar welding connection, thereby improving the overall performance of the battery. The sinusoidal waveform design can reduce the stress concentration phenomenon generated during welding and reduce the risk of cracking of the welded joint. The hole design on the collector plate can ensure that the electrolyte can smoothly enter the interior of the winding core, providing the necessary conditions for the normal operation of the battery.

[0052] The winding process involves inspecting the positive and negative electrode sheets and the separator raw materials, and accurately cutting the positive and negative electrode sheets to predetermined sizes. The separators are also cut into corresponding sizes and used in conjunction with the positive and negative electrode sheets. The negative electrode sheet is placed on the central axis of the winding machine, and a layer of separator is covered on top of the negative electrode sheet, and then the positive electrode sheet is covered on top of it to form a "negative electrode-diaphragm-positive electrode" stacked structure. This is continued by alternating until the required number of layers or thickness is reached, and the stacked materials are tightly wound into a cylindrical or square core. After the winding is completed, the core is fixed with finishing tape.

[0053] The positive and negative electrode sheets and separators of the present application are precisely cut before winding to ensure that the size and thickness of each layer are consistent, which helps to form a uniform battery structure. The stacked materials are tightly wound into a cylindrical or square core, which helps to reduce internal voids and improve the energy density and overall performance of the battery.

[0054] There are microporous channels designed inside the diaphragm, and the ions in the electrolyte can freely shuttle through the microporous channels. The pore size of the microporous channels is less than 1μm.

[0055] It effectively prevents dendrites that may be generated inside the battery from penetrating the diaphragm, further reducing the risk of short circuit and improving the energy density of the battery.

[0056] The genetic algorithm encodes the welding parameters as chromosomes, and performs iterative optimization through selection, crossover and mutation to find the optimal welding parameter combination. The optimization step predetermines the welding optimization goals, which include maximizing welding strength, laser power and welding speed. Welding parameter combinations are randomly generated as the initial population, and the fitness function is designed according to the goal. The advantages and disadvantages of each group of generated parameter combinations are evaluated, and the fitness value is calculated. Crossover and mutation operations are performed, and finally repeated evaluation, selection, crossover and mutation operations are performed for iterative optimization, and the final output is the optimal parameter combination.

[0057] The fitness function is:

[0058] F(x)=max[0,Cf(x)]

[0059] Where F(x) is the fitness function, C is a constant, and f(x) is the functional combination of welding parameters;

[0060] The crossover operation is calculated using the arithmetic crossover method. For two welding parameter individuals Z1 and Z2, and a random number a, the arithmetic crossover is expressed as:

[0061] B1=a*Z1+(1-a)*Z2

[0062] B2=a*Z2+(1-a)*Z1

[0063] Among them, B1 is the first offspring, B2 is the second offspring, a is a random number with a value range of 0≤a≤1, and the formula generates new offspring individuals through weighting.

[0064] The mutation operation is performed using binary mutation. The mutation operation is to perform binary inversion on the chromosome and change the 0 on the selected gene position to 1. The mutation step is to determine the probability of mutation, which is between 0.001 and 0.1. The individual welding parameters of the mutation are selected, and the selection is based on the random number a. The mutation position is determined, the mutation operation is performed, and new parameters are generated to verify the new welding parameters to see if it is the optimal welding parameter combination. If not, repeated iterative optimization is continued. If so, the output is performed.

[0065] The welding parameter encoding in this application is a prior art, and no further elaboration is required. The arithmetic crossover method is a crossover method for real-number coded chromosomes. Daughter chromosomes are generated by performing arithmetic operations between two parent chromosomes, and is suitable for optimization problems of continuous variables.

[0066] The path planning algorithm uses the particle swarm optimization algorithm for processing. The processing steps are to predetermine each existing welding path, assign an initial position and speed to each welding path, perform iterative optimization, and update the speed and position of the welding path. The update formula is:

[0067] V=w 1 *v 1 +d 1 *r 1 (pB-g 1 )+d 2 *r 2 *(gB-g 1 )

[0068] Where V is the updated output, v 1 With g 1 It is divided into the speed and position of the ion, w is the weight of inertia, d 1 With d 2 are learning factors, r 1 With r 2 are random numbers, pB is the individual optimal solution of the welding path, gB is the global optimal solution. The optimal path in the welding process is obtained by the formula, and the welding movement is performed according to the path.

[0069] The definition equation of Archimedean spiral is:

[0070] O=e+hn

[0071] Where O is the radius distance from the origin to the curve, e and h are constants, controlling the starting radius and pitch of the spiral respectively, and n is the angle between the point and the x-axis;

[0072] The alienated sine line introduces a sinusoidal wave on the radius of the spiral and modifies the formula to:

[0073] r'=(e+hn)+ksin*(jn+m)

[0074] Among them, k is the amplitude of the controlled fluctuation, j is the frequency of the controlled fluctuation, and m is the phase shift. The Archimedean spiral is alienated through the formula.

[0075] In this application, the particle swarm optimization algorithm simulates birds in a flock by designing a massless particle. These particles have only two properties: speed and position. The speed represents the speed of movement, and the position represents the direction of movement. Each particle searches for the optimal solution in the search space alone and records it as the current individual extreme value pB. At the same time, all particles in the particle swarm share the optimal solution found by the entire group. This optimal solution is called the global extreme value gB. All particles in the particle swarm adjust their own speed and position according to the current individual extreme value they find and the current global optimal solution shared by the entire particle swarm.

[0076] A real-time monitoring and feedback mechanism is introduced during the welding process to detect the welding quality in real time. If abnormal welding is found, welding will be stopped immediately and the welding parameters will be adjusted.

[0077] The holes of the collecting plate are processed by a punching machine, and after the punching is completed, the outer surface is deburred.

[0078] Example 1

[0079] Reference Figure 5 and Figure 6 As shown, the positive and negative pole pieces and the diaphragm are wound to form a winding core, and the upper and lower ends of the winding core are respectively provided with a positive ear and a negative ear, and the positive and negative ears are flattened to form a welding area, and the upper and lower ear welding areas are laser welded to positive and negative current collecting plates, and the current collecting plate is circular and has 5 φ6mm injection holes evenly distributed, and the actual light-emitting sections and the actual non-light-emitting sections are numbered in sequence, the first section welding time is 120ms, and the light-emitting power is set to 0, the second section light-emitting time is 500ms, and the light-emitting power is set to 100% of the preset power, and so on, and the total welding time is the sum of all segment welding times, as shown in Table 1 below;

[0080] Table 1 shows the segment welding time and power table

[0081] Welding wire number 1 2 3 4 5 6 7 8 9 10 11 12 13 Welding time (ms) 120 500 40 80 40 85 40 90 40 95 40 100 10 Optical power (%) 0 100 0 100 0 100 0 0 0 100 0 100 0

[0082] After welding, the shell is put into the shell to continue the subsequent liquid injection, sealing and baking processes.

[0083] Real-time Example 2

[0084] Reference Figure 5 and Figure 6 As shown, the positive and negative pole pieces and the diaphragm are wound to form a winding core, and the upper and lower ends of the winding core have positive and negative pole ears, respectively. The positive and negative pole ears are formed into welding areas by die-cutting, and the upper and lower pole ear welding areas are laser welded to positive and negative current collecting plates, and the current collecting plate is circular and has 5 φ6mm injection holes reserved and evenly distributed. The actual light-emitting sections and the actual non-light-emitting sections are numbered in sequence. The welding time of the first section is 120ms, and the light-emitting power is set to 0. The light-emitting time of the second section is 500ms, and the light-emitting power is set to 100% of the preset power. By analogy, the total welding time is the sum of all segmented welding times; since the thickness of the pole ears at the outer edge of the die-cut pole ear winding core is slightly thin, the outer ring light-emitting power is set to 80% of the preset power, as shown in Table 2 below;

[0085] Table 2 shows the segment welding time and power table

[0086] Welding wire number 1 2 3 4 5 6 7 8 9 10 11 12 13 Welding time (ms) 120 500 40 80 40 85 40 90 40 95 40 100 10 Optical power (%) 0 100 0 100 0 100 0 80 0 80 0 80 0

[0087] After welding, the shell is put into the shell to continue the subsequent liquid injection, sealing and baking processes.

[0088] Comparative Example 1

[0089] Reference Figure 3 and Figure 4 As shown, according to the material and thickness of the collector plate and the pole, set appropriate laser power, welding speed and focus position parameters;

[0090] Welding process: Start the laser welding equipment and focus the laser beam on the contact surface between the collector plate and the pole;

[0091] The laser beam quickly melts the material on the contact surface to form a molten pool;

[0092] Before the molten pool solidifies, keep the relative position of the collector and the pole stable to ensure the firmness of the welding point and complete the welding.

[0093] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A cylindrical battery collector plate welding method, characterized in that: The welding method is: Optimize welding parameters based on genetic algorithm, find the best welding parameter combination, and use the current welding parameter combination for welding; Based on the path planning algorithm, the path in the welding process is planned and set, so that the collector plate moves along the predetermined path during welding; The positive and negative electrode sheets and the separator are wound to form a winding core, and the separator separates the positive and negative electrodes to prevent short circuit; An upper pole ear is arranged at the upper end of the winding core, and a lower pole ear is arranged at the lower end of the winding core, and the upper and lower pole ears are welded to the upper and lower current collecting plates; The pole piece and the pole ear of the winding cross section are distributed as Archimedean spirals, and the welding trajectory is the Archimedean spiral, which is then transformed into a sine line. The spiral pitch when drawing the Archimedean spiral is a multiple of the pole ear distribution pitch, so as to ensure that after welding, the pole ear in each area has a similar weld bead to connect the pole ear to the collector plate; When the sine line is transformed, the amplitude is set smaller than the spiral pitch of the Archimedean spiral, and the period is set based on the inner lines not crossing each other. Holes are reserved on the collector plate to allow the electrolyte to enter the core. The welding power and time waveform is accurately set to each section of light emission and non-light emission time, so that the actual light emission power is zero at the hole position, and the collector plate is welded.

2. The cylindrical battery collector plate welding method according to claim 1, characterized in that: Winding is carried out by inspecting the positive and negative electrode sheets and the raw materials of the separator, and accurately cutting the positive and negative electrode sheets according to the predetermined size, and cutting the separator into the corresponding size, and using it in conjunction with the positive and negative electrode sheets. The negative electrode sheet is placed on the central axis of the winding machine, and a layer of separator is covered on the negative electrode sheet, and then the positive electrode sheet is covered on it to form a "negative electrode-diaphragm-positive electrode" stacked structure. Continue alternating until the required number of layers or thickness is reached, and the stacked materials are tightly wound into a cylindrical or square core. After winding is completed, the core is fixed with finishing tape.

3. The cylindrical battery collector plate welding method according to claim 1, characterized in that: There are microporous channels designed inside the diaphragm, and the ions in the electrolyte can freely shuttle through the microporous channels. The pore size of the microporous channels is less than 1μm.

4. The cylindrical battery collector plate welding method according to claim 1, characterized in that: The genetic algorithm encodes the welding parameters as chromosomes, and performs iterative optimization through selection, crossover and mutation to find the optimal welding parameter combination. The optimization step predetermines the welding optimization goals, which include maximizing welding strength, laser power and welding speed. Welding parameter combinations are randomly generated as the initial population, and the fitness function is designed according to the goal. The advantages and disadvantages of each group of generated parameter combinations are evaluated, and the fitness value is calculated. Crossover and mutation operations are performed, and finally repeated evaluation, selection, crossover and mutation operations are performed for iterative optimization, and the final output is the optimal parameter combination.

5. The cylindrical battery collector plate welding method according to claim 4, characterized in that: The fitness function is: F(x)=max[0,Cf(x)] Where F(x) is the fitness function, C is a constant, and f(x) is the functional combination of welding parameters; The crossover operation is calculated using the arithmetic crossover method. For two welding parameter individuals Z1 and Z2, and a random number a, the arithmetic crossover is expressed as: B1=a*Z1+(1-a)*Z2 B2=a*Z2+(1-a)*Z1 Among them, B1 is the first offspring, B2 is the second offspring, a is a random number with a value range of 0≤a≤1, and the formula generates new offspring individuals through weighting.

6. The cylindrical battery collector plate welding method according to claim 4, characterized in that: The mutation operation is performed using binary mutation. The mutation operation is to perform binary inversion on the chromosome and change the 0 on the selected gene position to 1. The mutation step is to determine the probability of mutation, which is between 0.001 and 0.

1. The individual welding parameters of the mutation are selected, and the selection is based on the random number a. The mutation position is determined, the mutation operation is performed, and new parameters are generated to verify the new welding parameters to see if it is the optimal welding parameter combination. If not, repeated iterative optimization is continued. If so, the output is performed.

7. The cylindrical battery collector plate welding method according to claim 1, characterized in that: The path planning algorithm uses the particle swarm optimization algorithm for processing. The processing steps are to predetermine each existing welding path, assign an initial position and speed to each welding path, perform iterative optimization, and update the speed and position of the welding path. The update formula is: V=w1*v1+d1*r1(pB-g1)+d2*r2*(gB-g1) Among them, V is the updated result output, v1 and g1 are the speed and position of the ion respectively, w is the weight of inertia, d1 and d2 are learning factors respectively, r1 and r2 are random numbers respectively, pB is the individual optimal solution of the welding path, gB is the global optimal solution, and the optimal path in the welding process is obtained through the formula, and the welding movement is performed according to the path.

8. The cylindrical battery collector plate welding method according to claim 1, characterized in that: The definition equation of Archimedean spiral is: O=e+hn Where O is the radius distance from the origin to the curve, e and h are constants, controlling the starting radius and pitch of the spiral respectively, and n is the angle between the point and the x-axis; The alienated sine line introduces a sinusoidal wave on the radius of the spiral and modifies the formula to: r'=(e+hn)+ksin*(jn+m) Among them, k is the amplitude of the controlled fluctuation, j is the frequency of the controlled fluctuation, and m is the phase shift. The Archimedean spiral is alienated through the formula.

9. The cylindrical battery collector plate welding method according to claim 1, characterized in that: A real-time monitoring and feedback mechanism is introduced during the welding process to detect the welding quality in real time. If abnormal welding is found, welding will be stopped immediately and the welding parameters will be adjusted.

10. The cylindrical battery collector plate welding method according to claim 1, characterized in that: The holes of the collecting plate are processed by a punching machine, and after the punching is completed, the outer surface is deburred.

Images