Ultrasonic welding machine debugging and aging method for lithium battery cell tab welding

Abstract

The invention provides an ultrasonic welding machine debugging and aging method for lithium battery cell tab welding, and belongs to the field of lithium battery processing equipment.The lithium battery cell tab test material selected by the ultrasonic welding machine debugging and aging method for lithium battery cell tab welding is the same as the lithium battery cell product material; the materials are not processed on the whole line, so that the waste of products is avoided in selection of the test materials, the energy consumption of equipment is reduced to the greatest extent, and the product cost is saved; meanwhile, according to the debugging and aging method of the ultrasonic welding machine for welding the lithium battery cell tab, different welding process parameters in the data storage equipment are directly called to replace the mode that ultrasonic waves are manually adjusted through an ultrasonic self-carried panel in the prior art; therefore, the defect that in the prior art, trial is conducted by experience of debugging personnel is overcome.

Description

Technical Field

[0001] The invention belongs to the field of lithium battery processing equipment, and in particular relates to a debugging and aging method of an ultrasonic welder used for welding lithium battery cell tabs. Background Art

[0002] In the field of lithium battery technology, the tabs serve as the lead-out terminals of the positive and negative electrodes, are connected to the shell or directly led out, and are used to conduct current between the outside and the electrodes.

[0003] At present, the connection method of the pole ear of lithium battery is usually welding or bolting, but the traditional bolt connection method is limited by factors such as flow area and uneven pressure distribution, which easily leads to contact resistance fluctuations, thereby affecting battery performance and service life; the traditional welding method faces the challenge of using different metal materials for the positive and negative electrodes of lithium batteries, and often requires the use of intermediate transition materials, which increases the complexity of the process and faces the problem of insufficient welding strength. In order to significantly improve the welding quality of lithium battery pole ears and effectively reduce the technical difficulty in the welding process, ultrasonic pole ear welding technology came into being. This technology realizes direct welding without the need for additional transition materials, ensures the high quality of the welding joint and sufficient flow area, and effectively avoids the limitations of traditional methods. Moreover, with the leap in scientific research strength, the application of ultrasonic welding on lithium battery pole ears not only surpasses the traditional bolt connection and welding mode, but also eliminates the adverse mutual interference between multiple factors, minimizes the potential damage of welding to the lithium battery body, thereby ensuring the long-term stable operation of the battery, extending its service life, and opening up a new application chapter of ultrasonic welding technology.

[0004] However, the existing ultrasonic welders still have certain limitations in practical applications: since the existing ultrasonic welders need to be constantly tried during the debugging process, and the debugging process of the existing ultrasonic welders is generally completed by evaluating the welding quality of the finished materials, the existing ultrasonic welder debugging and aging methods will have the problem of high debugging costs when used; at the same time, since the debugging process of the existing ultrasonic welders is entirely based on the experience of the debugging personnel to try, it also has defects such as low debugging efficiency and poor stability. Summary of the invention

[0005] The technical problem solved by the present invention is to provide a debugging and aging method for an ultrasonic welder used for welding lithium battery cell tabs, so that it can avoid the defects of debugging and testing the machine with finished materials under the prior art, and speed up the debugging progress of the ultrasonic welder used for welding lithium battery cell tabs during welding, thereby improving the stability of the ultrasonic welder used for welding lithium battery cell tabs.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is: a method for debugging and aging an ultrasonic welder for welding the tabs of a lithium battery cell, which comprises the following steps: Step 1: Place the lithium battery cell tab test material, which is the same material as the lithium battery cell product, on the cell test fixture; Step 2: first move the battery cell test fixture to the A ultrasonic welder station, then transmit a set of welding process parameters from a plurality of welding process parameters stored in the data storage facility to the A ultrasonic welder, and after receiving the corresponding welding process parameters, the A ultrasonic welder welds the positive pole ear of the lithium battery cell pole ear test material placed in the battery cell test fixture; after the welding operation is completed, the A ultrasonic welder transmits the welding process data of this welding operation to the data storage facility, and the data storage facility stores the welding process data; Step three, first move the battery cell test fixture to the B ultrasonic welder station, then transmit a set of welding process parameters from the multiple welding process parameters stored in the data storage facility to the B ultrasonic welder, and after receiving the corresponding welding process parameters, the B ultrasonic welder welds the negative pole ear of the lithium battery battery cell pole ear test material placed in the battery cell test fixture; after the welding operation is completed, the B ultrasonic welder transmits the welding process data of this welding operation to the data storage facility, and the data storage facility stores the welding process data; Step 4, first move the battery cell test fixture to the tensile test station, and then perform a tensile test on the welded lithium battery cell pole ear test material through the tensile test equipment under the standard torque requirement of the pole ear, and determine whether the lithium battery cell pole ear test material is damaged after the tensile test. If the battery cell pole ear test material is damaged, the tensile test result is unqualified; if the battery cell pole ear test material is not damaged, the tensile test result is qualified; finally, after the test, the tensile test parameters and tensile test results of the tensile test equipment are transmitted to the data storage facility, and the data storage facility stores the tensile test data and tensile test results; Step 5: first move the battery cell test fixture to the internal resistance detection station, then use the internal resistance detection equipment to detect the internal resistance of the welded lithium battery cell tab test material, and after the monitoring is completed, transmit the internal resistance detection result of the internal resistance detection equipment to the data storage facility, and the data storage facility compares the internal resistance detection result with the set demand value, and determines whether the internal resistance detection result is qualified; Step 6: If the test results obtained in step 4 and step 5 are both qualified, proceed to step 8; if the test results obtained in step 4 and / or step 5 are unqualified, select the changed welding process parameters from the welding process parameters stored in the data storage facility according to the corresponding test results as the next test data; Step 7, using the changed welding process parameters to sequentially perform steps 2 and 3, step 4, step 5, and step 6; until the test results obtained in steps 4 and 5 are both qualified; Step eight, fix all the data used in steps two to five when the qualified test results are obtained in steps four and five, and perform copy verification on the ultrasonic welder until the test materials output by the ultrasonic welder in each cycle are qualified, and the debugging and aging are completed.

[0007] Based on this, on the one hand, the present invention avoids product waste from the selection of test materials, and also reduces the energy consumption of equipment from the greatest level, saving product costs while reducing equipment energy consumption and labor costs; on the other hand, the present invention replaces the method of manually adjusting ultrasonic waves through the ultrasonic panel under the prior art by directly calling different welding process parameters in the data storage device, and the method of manually adjusting ultrasonic waves through the ultrasonic panel under the prior art does not have the function of data statistics and summary comparison and analysis, so the present invention avoids the defects of relying entirely on the experience of the debugging personnel under the prior art. At the same time, because the data storage facility and the corresponding equipment in the present invention communicate through Ethernet, it also has the characteristics of real-time tracking, IO monitoring, etc., and realizes the functions of pre-welding control, welding control, post-welding control, and other control of the two ultrasonic welders by the data storage facility through Ethernet communication.

[0008] Further, in step seven, after the A ultrasonic welder performs multiple welding of the positive pole tabs on the lithium battery cell tab test material, the data storage facility performs statistics on the multiple sets of welding process data obtained to form a test data summary analysis table one; after the B ultrasonic welder performs multiple welding of the negative pole tabs on the lithium battery cell tab test material, the data storage facility performs statistics on the multiple sets of welding process data obtained to form a test data summary analysis table two; after the tensile test station performs multiple tensile tests on the lithium battery cell tab test material, the data storage facility performs data statistics on the tensile test parameters and tensile test results obtained to form a tensile test data summary table; and the debugging personnel or the data storage facility can make directional modifications to the welding process parameters based on the analysis report.

[0009] Furthermore, the welding process parameters include: delay time, trigger height of welding head, welding mode, welding time, welding amplitude, welding pressure, maximum ultrasonic time, secondary ultrasonic delay, secondary ultrasonic time, cooling time. The delay time refers to the delay time from the ultrasonic welder descending to the trigger height to the ultrasonic wave in the height trigger mode; the welding mode refers to the time mode, that is, the welding stops after reaching the time value; the welding time refers to the duration of ultrasonic wave emission in the time mode; the welding amplitude refers to the displacement of the mechanical movement of the welding head; the maximum ultrasonic time refers to the maximum duration of ultrasonic wave emission, so as to avoid the situation of too long ultrasonic wave emission time; the secondary ultrasonic delay refers to the cylinder holding time after welding ends; the secondary ultrasonic time refers to the duration of secondary ultrasonic wave emission after welding ends; the cooling time refers to the cooling and blowing time after welding ends.

[0010] Furthermore, the welding process data includes: real-time frequency, storage frequency, ultrasonic time, welding amplitude, welding energy, maximum power, maximum power, real-time power, no-load power, welding gas pressure, cycle time, number of welds, height before weld, height after weld, height difference, real-time height, and generator status.

[0011] Further, the tension test parameters include a test air pressure and / or a test torque of the tension test equipment.

[0012] Furthermore, the tension test equipment includes a main cylinder 1, the cylinder body of the main cylinder 1 is fixed on the test frame, the end of the piston rod of the main cylinder 1 is fixedly connected to a mounting plate, and two clamping cylinders are installed on the mounting plate. The two clamping cylinders can clamp the positive pole ear and the negative pole ear of the lithium battery cell pole ear test material respectively. In this way, when a tension test is required, it can first control the main cylinder 1 to be in an extended state, and then control the two clamping cylinders to clamp the positive pole ear and the negative pole ear of the lithium battery cell pole ear test material placed on the battery cell test fixture, and finally control the main cylinder 1 to retract, so as to achieve the purpose of performing a tension test on the lithium battery cell pole ear test material.

[0013] Furthermore, a gas proportional valve is provided in the control air circuit of the master cylinder 1, and the pressure at the air inlet and the air outlet of the master cylinder 1 is adjusted by the gas proportional valve to achieve the purpose of adjusting the torque driven by the master cylinder 1. Moreover, since the gas proportional valve itself has the characteristic of high precision, it can accurately control the gas pressure at the air inlet and control the output torque to an accuracy of 0.01N, thereby achieving the purpose of the tensile test station being able to provide a variety of torque requirements.

[0014] Furthermore, the master cylinder 1 is provided with a torque display, and the air inlet and air outlet of the master cylinder 1 are equipped with air pressure displays. The torque display and the air pressure display are both communicatively connected to the data storage facility, so that the torque data and air pressure data can be transmitted to the data storage facility via Ethernet communication, and the torque data and air pressure data can be stored through the data storage facility. At the same time, it can also display the torque at all times.

[0015] Furthermore, the internal resistance detection equipment includes a main cylinder 2, the cylinder body of the main cylinder 2 is fixed on the test frame, the piston rod end of the main cylinder 2 is fixedly connected to a resistance detector, and the two probes of the resistance detector can respectively contact the positive pole ear and the negative pole ear of the lithium battery cell pole ear test material. In this way, when internal resistance detection is required, it can first control the main cylinder 2 to be in an extended state, and then control the two probes of the resistance detector to respectively contact the positive pole ear and the negative pole ear of the lithium battery cell pole ear test material placed on the battery test fixture, so as to achieve the purpose of internal resistance detection of the lithium battery cell pole ear test material.

[0016] Furthermore, ultrasonic welder A and ultrasonic welder B, tensile testing equipment, and internal resistance testing equipment are arranged on the rack in sequence along a straight line. The battery cell testing fixture is installed on the rack by horizontal sliding on a horizontal guide rail and can be switched between various workstations.

[0017] It can be seen from the above technical solutions that the present invention has the following advantages: on the one hand, the present invention avoids product waste from the selection of test materials, and also reduces the energy consumption of the equipment from the greatest level, saving product costs while reducing equipment energy consumption and labor costs; on the other hand, the present invention replaces the method of manually adjusting the ultrasonic wave through the ultrasonic panel under the prior art by directly calling different welding process parameters in the data storage device, and the method of manually adjusting the ultrasonic wave through the ultrasonic panel under the prior art does not have the function of data statistics and summary comparison and analysis, so the present invention avoids the defects of relying entirely on the experience of the debugging personnel under the prior art. At the same time, because the data storage facility and the corresponding equipment in the present invention communicate through Ethernet, it also has the characteristics of real-time tracking, IO monitoring, etc., and realizes the functions of the data storage facility to perform pre-welding control, welding control, post-welding control, and other control on the two ultrasonic welders through Ethernet communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1It is a structural schematic diagram of a device used in the implementation process of an ultrasonic welding machine debugging and aging method for lithium battery cell tab welding according to the present invention; Figure 2 It is a structural schematic diagram of an ultrasonic welder used in the implementation process of an ultrasonic welder debugging and aging method for welding a lithium battery cell tab of the present invention; Figure 3 It is a structural schematic diagram of a tensile testing device used in the implementation process of an ultrasonic welding machine debugging and aging method for lithium battery cell tab welding according to the present invention; Figure 4 It is a structural schematic diagram of an internal resistance detection device used in the implementation process of an ultrasonic welding machine debugging and aging method for lithium battery cell tab welding according to the present invention; Figure 5 The present invention is a structural schematic diagram of a battery cell testing fixture used in the implementation process of an ultrasonic welding machine debugging and aging method for lithium battery cell tab welding.

[0020] In the figure: 1-1, A ultrasonic welder; 1-2, B ultrasonic welder; 1-3, tensile testing equipment; 1-4, internal resistance testing equipment; 1-5, battery cell testing fixture. DETAILED DESCRIPTION

[0021] 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.

[0022] The present invention provides an ultrasonic welding machine debugging and aging method for lithium battery cell tab welding, which comprises the following steps: Step 1: Place the lithium battery cell tab test material, which is the same material as the lithium battery cell product, on the cell test fixture; Step 2: first move the battery cell test fixture to the A ultrasonic welder station, then transmit a set of welding process parameters from a plurality of welding process parameters stored in the data storage facility to the A ultrasonic welder, and after receiving the corresponding welding process parameters, the A ultrasonic welder welds the positive pole ear of the lithium battery cell pole ear test material placed in the battery cell test fixture; after the welding operation is completed, the A ultrasonic welder transmits the welding process data of this welding operation to the data storage facility, and the data storage facility stores the welding process data; Step three, first move the battery cell test fixture to the B ultrasonic welder station, then transmit a set of welding process parameters from the multiple welding process parameters stored in the data storage facility to the B ultrasonic welder, and after receiving the corresponding welding process parameters, the B ultrasonic welder welds the negative pole ear of the lithium battery battery cell pole ear test material placed in the battery cell test fixture; after the welding operation is completed, the B ultrasonic welder transmits the welding process data of this welding operation to the data storage facility, and the data storage facility stores the welding process data; Step 4, first move the battery cell test fixture to the tensile test station, and then perform a tensile test on the welded lithium battery cell pole ear test material under the standard torque requirement of the pole ear through the tensile test equipment, and determine whether the lithium battery cell pole ear test material is damaged after the tensile test. If the battery cell pole ear test material is damaged, the tensile test result is unqualified; if the battery cell pole ear test material is not damaged, the tensile test result is qualified; finally, after the test, the tensile test parameters and tensile test results of the tensile test equipment are transmitted to the data storage facility, and the data storage facility stores the tensile test data and tensile test results; and the tensile test parameters include the test air pressure and / or test torque of the tensile test equipment; Step 5: first move the battery cell test fixture to the internal resistance detection station, then use the internal resistance detection equipment to detect the internal resistance of the welded lithium battery cell tab test material, and after the monitoring is completed, transmit the internal resistance detection result of the internal resistance detection equipment to the data storage facility, and the data storage facility compares the internal resistance detection result with the set demand value, and determines whether the internal resistance detection result is qualified; Step 6: If the test results obtained in step 4 and step 5 are both qualified, proceed to step 8; if the test results obtained in step 4 and / or step 5 are unqualified, select the changed welding process parameters from the welding process parameters stored in the data storage facility according to the corresponding test results as the next test data; Step 7, using the changed welding process parameters to sequentially perform steps 2 and 3, step 4, step 5, and step 6; until the test results obtained in steps 4 and 5 are both qualified; Step eight, fix all the data used in steps two to five when the qualified test results are obtained in steps four and five, and perform copy verification on the ultrasonic welder until the test materials output by the ultrasonic welder in each cycle are qualified, and the debugging and aging are completed.

[0023] And in step 2 and step 3, the multiple welding process parameters stored in the data storage facility include: delay time, trigger height of welding head, welding mode, welding time, welding amplitude, welding pressure, maximum ultrasonic time, secondary ultrasonic delay, secondary ultrasonic time, cooling time. And the delay time refers to the delay time from the ultrasonic welder descending to the trigger height to the ultrasonic wave before emitting in the height trigger mode; welding mode refers to the time mode, that is, the welding stops after reaching the time value; welding time refers to the duration of ultrasonic wave emission in the time mode; welding amplitude refers to the displacement of the mechanical movement of the welding head; maximum ultrasonic time refers to the maximum duration of ultrasonic wave emission, so as to avoid the situation of excessive ultrasonic wave emission; the secondary ultrasonic delay refers to the cylinder holding time after welding ends; the secondary ultrasonic time refers to the duration of secondary ultrasonic wave emission after welding ends; the cooling time refers to the cooling air blowing time after welding ends; and the above parameters are stored in the data storage facility with multiple values, which can be arranged to form multiple groups of welding process parameters. The welding process data includes: real-time frequency, stored frequency, ultrasonic time, welding amplitude, welding energy, maximum power, maximum power, real-time power, no-load power, welding gas pressure, cycle time, number of welding times, height before welding, height after welding, height difference, real-time height, and generator status.

[0024] In step 4, the tension test equipment includes a main cylinder 1, the cylinder body of the main cylinder 1 is fixed on the test frame, the end of the piston rod of the main cylinder 1 is fixedly connected to a mounting plate, and two clamping cylinders are installed on the mounting plate. The two clamping cylinders can clamp the positive pole ear and the negative pole ear of the lithium battery cell pole ear test material respectively. In this way, when a tension test is required, it can first control the main cylinder 1 to be in an extended state, and then control the two clamping cylinders to clamp the positive pole ear and the negative pole ear of the lithium battery cell pole ear test material placed on the battery test fixture, and finally control the main cylinder 1 to retract, so as to achieve the purpose of performing a tension test on the lithium battery cell pole ear test material.

[0025] Furthermore, as a preferred embodiment, the control gas circuit of the master cylinder 1 is provided with a gas proportional valve, and the pressure at the air inlet and air outlet of the master cylinder 1 is adjusted by the gas proportional valve to achieve the purpose of adjusting the torque driven by the master cylinder 1. Moreover, since the gas proportional valve itself has the characteristics of high precision, it can achieve precise control of the gas pressure at the air inlet, and the control precision of the output torque is accurate to 0.01N, thereby achieving the purpose of the tensile test station being able to provide a variety of torque requirements. The master cylinder 1 is provided with a torque display, and the air inlet and air outlet of the master cylinder 1 are both equipped with air pressure displays, and the torque display and air pressure display are both connected to the data storage facility in communication, so that the torque data and air pressure data can be transmitted to the data storage facility through the Ethernet communication mode, and the torque data and air pressure data are stored through the data storage facility, and the torque can also be displayed at all times.

[0026] In step five, the internal resistance detection equipment includes a main cylinder 2, the cylinder body of the main cylinder 2 is fixed on the test frame, the piston rod end of the main cylinder 2 is fixedly connected to a resistance detector, and the two probes of the resistance detector can respectively contact the positive pole ear and the negative pole ear of the lithium battery cell pole ear test material. In this way, when internal resistance detection is required, it can first control the main cylinder 2 to be in an extended state, and then control the two probes of the resistance detector to respectively contact the positive pole ear and the negative pole ear of the lithium battery cell pole ear test material placed on the battery test fixture, so as to achieve the purpose of internal resistance detection of the lithium battery cell pole ear test material.

[0027] In addition, in step six, if the tab meets the requirements after the test in step four, the debugging personnel can also continue to change the welding process parameters, and transmit the changed welding process parameters to ultrasonic welder A or ultrasonic welder B through the communication method of Ethernet to adjust the welding process parameters of the corresponding ultrasonic welder; at this time, it can improve the welding efficiency under the premise of ensuring the torque through debugging here, and achieve the most efficient working state of ultrasonic welder A and ultrasonic welder B. Similarly, if the tab meets the requirements after the test in step five, the debugging personnel can also continue to change the welding process parameters, and transmit the changed welding process parameters to ultrasonic welder A or ultrasonic welder B through the communication method of Ethernet to adjust the welding process of the corresponding ultrasonic welder; at this time, it can improve the welding efficiency under the premise of ensuring the resistance through debugging here, and achieve the most efficient working state of ultrasonic welder A and ultrasonic welder B.

[0028] Based on this, on the one hand, the present invention avoids product waste from the selection of test materials, and also reduces the energy consumption of equipment from the greatest level, saving product costs while reducing equipment energy consumption and labor costs; on the other hand, the present invention replaces the method of manually adjusting ultrasonic waves through the ultrasonic panel under the prior art by directly calling different welding process parameters in the data storage device, and the method of manually adjusting ultrasonic waves through the ultrasonic panel under the prior art does not have the function of data statistics and summary comparison and analysis, so the present invention avoids the defects of relying entirely on the experience of the debugging personnel under the prior art. At the same time, because the data storage facility and the corresponding equipment in the present invention communicate through Ethernet, it also has the characteristics of real-time tracking, IO monitoring, etc., and realizes the functions of pre-welding control, welding control, post-welding control, and other control of the two ultrasonic welders by the data storage facility through Ethernet communication.

[0029] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0030] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for debugging and aging an ultrasonic welder for welding a lithium battery cell tab, characterized in that: The following steps are involved: Step 1: Place the lithium battery cell tab test material, which is the same material as the lithium battery cell product, on the cell test fixture; Step 2: first move the battery cell test fixture to the A ultrasonic welder station, then transmit a set of welding process parameters from a plurality of welding process parameters stored in the data storage facility to the A ultrasonic welder, and after receiving the corresponding welding process parameters, the A ultrasonic welder welds the positive pole ear of the lithium battery cell pole ear test material placed in the battery cell test fixture; after the welding operation is completed, the A ultrasonic welder transmits the welding process data of this welding operation to the data storage facility, and the data storage facility stores the welding process data; Step three, first move the battery cell test fixture to the B ultrasonic welder station, then transmit a set of welding process parameters from the multiple welding process parameters stored in the data storage facility to the B ultrasonic welder, and after receiving the corresponding welding process parameters, the B ultrasonic welder welds the negative pole ear of the lithium battery battery cell pole ear test material placed in the battery cell test fixture; after the welding operation is completed, the B ultrasonic welder transmits the welding process data of this welding operation to the data storage facility, and the data storage facility stores the welding process data; Step 4, first move the battery cell test fixture to the tensile test station, and then perform a tensile test on the welded lithium battery cell pole ear test material through the tensile test equipment under the standard torque requirement of the pole ear, and determine whether the lithium battery cell pole ear test material is damaged after the tensile test. If the battery cell pole ear test material is damaged, the tensile test result is unqualified; if the battery cell pole ear test material is not damaged, the tensile test result is qualified; finally, after the test, the tensile test parameters and tensile test results of the tensile test equipment are transmitted to the data storage facility, and the data storage facility stores the tensile test data and tensile test results; Step 5: first move the battery cell test fixture to the internal resistance detection station, then use the internal resistance detection equipment to detect the internal resistance of the welded lithium battery cell tab test material, and after the monitoring is completed, transmit the internal resistance detection result of the internal resistance detection equipment to the data storage facility, and the data storage facility compares the internal resistance detection result with the set demand value, and determines whether the internal resistance detection result is qualified; Step 6: If the test results obtained in step 4 and step 5 are both qualified, proceed to step 8; if the test results obtained in step 4 and / or step 5 are unqualified, select the changed welding process parameters from the welding process parameters stored in the data storage facility according to the corresponding test results as the next test data; Step 7, using the changed welding process parameters to sequentially perform steps 2 and 3, step 4, step 5, and step 6; until the test results obtained in steps 4 and 5 are both qualified; Step eight, fix all the data used in steps two to five when the qualified test results are obtained in steps four and five, and perform copy verification on the ultrasonic welder until the test materials output by the ultrasonic welder in each cycle are qualified, and the debugging and aging are completed.

2. The method for debugging and aging an ultrasonic welder for lithium battery cell tab welding according to claim 1, characterized in that: In step seven, after the A ultrasonic welder performs multiple welding of the positive pole tabs on the lithium battery cell tab test material, the data storage facility performs statistics on the multiple sets of welding process data obtained to form a test data summary analysis table 1; after the B ultrasonic welder performs multiple welding of the negative pole tabs on the lithium battery cell tab test material, the data storage facility performs statistics on the multiple sets of welding process data obtained to form a test data summary analysis table 2; after the tensile test station performs multiple tensile tests on the lithium battery cell tab test material, the data storage facility performs data statistics on the tensile test parameters and tensile test results obtained to form a tensile test data summary table.

3. The method for debugging and aging an ultrasonic welder for lithium battery cell tab welding according to claim 1, characterized in that: The welding process parameters include: delay time, trigger height of welding head, welding mode, welding time, welding amplitude, welding pressure, maximum ultrasonic time, secondary ultrasonic delay, secondary ultrasonic time, and cooling time.

4. The method for debugging and aging an ultrasonic welder for lithium battery cell tab welding according to claim 1, characterized in that: The welding process data includes: real-time frequency, stored frequency, ultrasonic time, welding amplitude, welding energy, maximum power, maximum power, real-time power, no-load power, welding gas pressure, cycle time, number of welding times, height before welding, height after welding, height difference, real-time height, and generator status.

5. The method for debugging and aging an ultrasonic welder for lithium battery cell tab welding according to claim 1, characterized in that: The tensile test parameters include the test air pressure and / or the test torque of the tensile test equipment.

6. The method for debugging and aging an ultrasonic welder for lithium battery cell tab welding according to claim 1, characterized in that: The tensile testing equipment includes a main cylinder 1, the cylinder body of the main cylinder 1 is fixed on the test frame, the end of the piston rod of the main cylinder 1 is fixedly connected to a mounting plate, and two clamping cylinders are installed on the mounting plate. The two clamping cylinders can respectively clamp the positive pole ear and the negative pole ear of the lithium battery cell pole ear test material.

7. The method for debugging and aging an ultrasonic welder for lithium battery cell tab welding according to claim 6, characterized in that: The control gas circuit of the main gas cylinder 1 is provided with a gas proportional valve.

8. The method for debugging and aging an ultrasonic welder for lithium battery cell tab welding according to claim 6, characterized in that: The main cylinder 1 is provided with a torque display, and the air inlet and air outlet of the main cylinder 1 are equipped with air pressure displays. The torque display and the air pressure display are both connected to the data storage facility for communication.

9. The method for debugging and aging an ultrasonic welder for lithium battery cell tab welding according to claim 1, characterized in that: The internal resistance detection equipment includes a main cylinder 2, the cylinder body of the main cylinder 2 is fixed on the test frame, the end of the piston rod of the main cylinder 2 is fixedly connected with a resistance detector, and the two probes of the resistance detector can respectively contact the positive pole ear and the negative pole ear of the lithium battery cell pole ear test material.

10. The method for debugging and aging an ultrasonic welder for lithium battery cell tab welding according to claim 1, characterized in that: Ultrasonic welder A and ultrasonic welder B, tensile testing equipment, and internal resistance testing equipment are arranged on the rack in sequence along a straight line, and the battery cell testing fixture is installed on the rack by horizontal sliding through a horizontal guide rail.

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