CN111398296A - System and method for detecting welding quality of tab of battery module of soft-package battery cell - Google Patents
System and method for detecting welding quality of tab of battery module of soft-package battery cell Download PDFInfo
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- CN111398296A CN111398296A CN202010344239.6A CN202010344239A CN111398296A CN 111398296 A CN111398296 A CN 111398296A CN 202010344239 A CN202010344239 A CN 202010344239A CN 111398296 A CN111398296 A CN 111398296A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Sealing Battery Cases Or Jackets (AREA)
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Abstract
The invention discloses a system and a method for detecting the welding quality of a tab of a battery module of a soft-package battery cell, and belongs to the field of new energy automobiles. The battery module walking assembly is arranged on a first guide rail on the machine table, the vibration leveling assembly and the detection assembly are arranged on the same side of the first guide rail, a welding head of an ultrasonic welding machine in the vibration leveling assembly and a sensing head of a linear laser measuring instrument in the detection assembly are both positioned above the first guide rail, and the sensing heads are arranged at the downstream position of the welding head in the working procedure; according to the invention, related control programs can be flexibly set according to different welding seam positions and quantities of different battery modules, the welding head vibrates on the bus bar near the welding seam by setting the downward pressure of the welding head, the welding seam with poor welding is loosened and tilted, whether the welding seam is welded or not is judged by photographing and scanning, and whether the welding is qualified or not is judged by measuring the relative height difference between the lug and the bus bar, so that the lug welding seam after laser welding meets the requirements of welding positions and reliably attaching the bus bar.
Description
Technical Field
The invention belongs to the field of new energy automobiles, and particularly relates to a system and a method for detecting the welding quality of a tab of a battery module of a soft-package cell.
Background
Various battery packs are required to be used on the new energy automobile, and power sources are provided for the automobile in a series-parallel connection mode. The battery cell in the battery pack has the forms of a hard shell, a soft bag and the like. The invention aims at a soft package battery cell. After the module is formed by the soft package battery cell, the tabs are generally required to be connected to the busbar, so that each single battery cell forms a required series-parallel connection mode, and the module is ensured to reliably output stable direct-current voltage and capacity. Laser welding is one of the ways that is currently used. After the tab is welded to the bus bar, it is generally required to detect a welded portion where the tab (tab material is copper or aluminum, in a sheet form) is welded to the bus bar.
Present detection mode has manual perk utmost point ear edge to observe, fixes the module to the shaking table and carries out vibration test etc. again, has following not enough:
(1) manually raising the edge of the tab, wherein the raised tab needs to be pressed down to recover to a flat state, so that the efficiency is low, and operators are easy to fatigue;
(2) carry out vibration test again with the module and judge welding quality to the shaking table, the process is complicated, and is consuming time longer, seriously influences the production beat of module.
Therefore, a way to automatically and efficiently detect the welding quality of the tab and the bus bar is needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a system and a method for judging the laser welding quality of a tab of a battery module of a soft package cell, aiming at solving the problems that the observation efficiency of the edge of the tab is low due to the fact that the tab is manually tilted, operators are easy to fatigue, and the production rhythm of the module is influenced by the fact that the module is fixed to a vibration table and then vibration test is carried out.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a tab welding quality detection system for a battery module of a soft-package battery cell comprises a machine table, a battery module walking assembly, a vibration leveling assembly, a detection assembly, a code scanning gun and an upper computer;
the machine table is provided with a first guide rail, the battery module walking assembly is installed on the first guide rail, the vibration leveling assembly and the detection assembly are installed on the same side of the first guide rail, the welding head of the ultrasonic welding machine in the vibration leveling assembly and the sensing head of the linear laser measuring instrument in the detection assembly are positioned above the first guide rail, and the sensing head of the linear laser measuring instrument is arranged at the downstream position of the working procedure of the welding head of the ultrasonic welding machine; the battery module walking assembly, the vibration leveling assembly, the detection assembly and the code scanning gun are all connected with an upper computer;
the battery module walking assembly comprises a first servo motor, a first lead screw sliding block pair and a first mounting platform fixed on the first lead screw sliding block pair, the first lead screw sliding block pair is mounted on a first guide rail, and the first servo motor is connected with the first lead screw sliding block pair.
Preferably, the first mounting table of the battery module walking assembly comprises an upper plate and a lower plate, the lower plate is fixed on the first lead screw sliding block pair, the upper plate is mounted on the lower plate, and the upper plate can rotate.
Preferably, the machine table is provided with a lifting plate, and when the first installation table runs above the lifting plate, the lifting plate can penetrate through the lower plate of the first installation table and drive the upper plate of the first installation table to lift and rotate.
Preferably, the vibration leveling assembly comprises an ultrasonic welding machine, a second servo motor, a second screw slide block pair and a second mounting table fixed on the second screw slide block pair; the ultrasonic welding machine is fixed on the second mounting table; the second screw rod sliding block pair is arranged on a second guide rail on the machine table, and the second servo motor is connected with the second screw rod sliding block pair; the second guide rail is perpendicular to the first guide rail.
Preferably, the working surface of the welding head of the ultrasonic welding machine is a plane, and the working surface is a straight and smooth rectangle.
Preferably, the detection assembly comprises a linear laser measuring instrument, a third servo motor, a third screw-slide block pair and a third mounting table fixed on the third screw-slide block pair; the line laser measuring instrument comprises a line laser measuring instrument sensing head and a line laser measuring instrument controller, and the line laser measuring instrument sensing head is fixed on the third mounting table; the third screw sliding block pair is arranged on a third guide rail on the machine table, and a third servo motor is connected with the third screw sliding block pair; the third guide rail is perpendicular to the first guide rail.
Preferably, the welding head of the ultrasonic welding machine is made of die steel.
In the working process, the ultrasonic welding machine converts 50Hz commercial power into a 20KHz frequency sinusoidal signal by using an ultrasonic generator, the sinusoidal signal is converted into mechanical motion with the same frequency through a transducer again, then the mechanical motion is transmitted to a welding head, the welding head transmits the received vibration energy to the surface of the busbar to be vibrated, in the area, the busbar is vibrated by the vibration energy, and the rest is converted into heat energy to be consumed. The line laser measuring instrument senses the welding line by a head, measures the height difference between the lug at the set position of the welding line and the busbar, and judges whether the welding line is welded at the correct position or not and whether the welding line drops or not by comparing with the set standard value interval.
The invention has the following beneficial effects:
the invention can effectively solve the problems that the observation efficiency of the manually-warped lug edge is low, an operator is easy to fatigue, and the production rhythm of the module is influenced by fixing the module to a vibration table and then performing vibration test, and specifically comprises the following steps:
(1) according to the different tab welding seam quantity of different battery modules, related control programs can be flexibly set, as long as the reference direction is determined, the ultrasonic welding machine automatically vibrates the busbar to each determined position according to a preset program, because the vibration frequency is very high (far higher than the related requirements in national standards), and the busbar is compressed by the welding head to form single-point stress, the welding seam with poor welding quality can be completely vibrated or the edge part is vibrated, loosened and lifted to separate from the busbar, then the height difference is tested by the linear laser measuring instrument, whether the standard sample is qualified or not is judged, the battery module walking assembly, the vibration assembly and the detection assembly are realized by the screw rod with adjustable speed, meanwhile, the ultrasonic vibration time is very short, the efficiency is greatly improved, and the fatigue condition of operators does not exist.
(2) The direct battery module that will await measuring is placed on the mount table of battery module walking subassembly, and rethread vibration subassembly and determine module's program setting just can directly simulate the vibration, then judges welding seam welding quality, need not additionally again to place the battery module that awaits measuring and experience the vibration process on the shaking table, has reduced the process to the production beat of module has been guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of a system for detecting the welding quality of a tab of a battery module of a soft-package cell according to the invention;
fig. 2 is a side view of the tab welding quality detection system of the soft-package cell battery module according to the present invention;
FIG. 3 is a side view of the entire inspection system as the upper deck rotates;
in the figure: 1, an upper computer; 2, a vibration leveling component, 21 an ultrasonic welding machine, 2101 an ultrasonic welding machine welding head, 22 a second servo motor, 23 a second lead screw slider pair, 24 a second mounting table and 25 a second guide rail; 3, a detection assembly, a 31-line laser measuring instrument sensing head, a 32 third servo motor, a 33 third lead screw sliding block pair, a 34 third mounting table and a 35 third guide rail; 4, a battery module walking assembly, a 41 first servo motor, a 42 first lead screw sliding block pair, a 43 first mounting table, a 4301 upper plate, a 4302 lower plate, a 44 first guide rail and a 45 jacking plate; 5, scanning a stacking gun; 6 machine table.
Detailed Description
The following provides a detailed description of preferred embodiments of the present invention. The technical features of the embodiments of the present invention can be combined correspondingly without mutual conflict.
The utility model provides a laminate polymer battery module utmost point ear welding quality detecting system, as shown in figure 1-2, include board 6, battery module walking subassembly 4, shake flat subassembly 2, determine module 3, sweep a yard rifle 5 and host computer 1, battery module walking subassembly 4, shake flat subassembly 2, determine module 3, sweep a yard rifle 5 and all with the host computer connection. The first guide rail 44 is arranged on the machine platform, the vibration-leveling component 2 and the detection component 3 are arranged on the same side of the first guide rail 44, the ultrasonic welding head 2101 in the vibration-leveling component 2 and the linear laser measuring instrument sensing head 31 in the detection component 3 are both positioned above the first guide rail 44, and the linear laser measuring instrument sensing head 31 is arranged at a position downstream of the ultrasonic welding head 2101 in the process.
The battery module walking component 4 comprises a first servo motor 41, a first lead screw sliding block pair 42, a first mounting table 43 and a first guide rail 44; the first screw rod sliding block pair 42 is arranged on a first guide rail 44, the first mounting platform 43 is arranged on the first screw rod sliding block pair 42, and the battery module to be tested is fixed on the first mounting platform 43; the first servomotor 41 is connected to the first spindle/slider pair 42.
The vibration leveling assembly 2 comprises an ultrasonic welding machine 21, a second servo motor 22, a second lead screw slider pair 23, a second mounting table 24 and a second guide rail 25; the second guide rail 25 is arranged on the machine table 6 and is vertical to the first guide rail 44; the second screw slider pair 23 is arranged on a second guide rail 25, a second mounting platform 24 is arranged on the second screw slider pair 23, and the ultrasonic welding machine 21 is fixed on the second mounting platform 24; the second servomotor 22 is connected to the second spindle/slider pair 23.
The detection assembly 3 comprises a linear laser measuring instrument, a third servo motor 32, a third lead screw sliding block pair 33, a third mounting table 34 and a third guide rail 35; the third guide rail 35 is installed on the machine table 6 and is perpendicular to the first guide rail 44; the third screw sliding block pair 33 is arranged on a third guide rail 35, and the third mounting table 34 is arranged on the third screw sliding block pair 33; the line laser measuring instrument comprises a line laser measuring instrument sensing head and a line laser measuring instrument controller, wherein the line laser measuring instrument sensing head 31 is fixed on a third mounting table 34, and the mounting position of the line laser measuring instrument controller is not limited and can be directly mounted on a machine table or mounted on the third mounting table; the third servomotor 32 is connected to a third screw-slide pair 33.
In one embodiment of the present invention, the first mounting table 43 of the battery module traveling assembly 4 includes an upper plate 4301 and a lower plate 4302, the lower plate 4302 is fixed on the first screw slider pair 42, the upper plate 4301 is mounted on the lower plate 4302, and the upper plate 4301 can rotate. The machine table 6 is provided with a lifting plate 45, when the first installation table 43 runs above the lifting plate 45, the lifting plate 45 can pass through the lower plate 4302 of the first installation table 43 and drive the upper plate 4301 of the first installation table 43 to lift and rotate, and a structural schematic diagram of the whole system when the upper plate 4301 rotates is shown in fig. 3.
The total size of the machine used in this example is L W H1800 mm 1700mm 1200mm, wherein the rated power of the ultrasonic welding machine is 3000W, 20Khz, and the welding head is made of die steel, the ultrasonic welding machine is fixed on a second mounting table, the second mounting table can be adjusted in the y-axis direction under the driving of a second servo motor and a second lead screw slider pair, the power of the second servo motor is 0.3 Kw., the welding head of the ultrasonic welding machine is different from the welding head of the general ultrasonic welding, the busbar contact part of the welding head of the invention is made into a smooth and straight shape, the vertical surface is narrow (10mm), and the welding head is preferably rectangular (which can be replaced according to the size and shape of different busbars).
According to the embodiment, the Keynshi line laser measuring instrument is used, the model of a sensing head is L J-X8080, the measuring range is that the Z axis is 73 +/-20.5 mm, the X axis is 35.0mm, the linearity is that the Z axis is +/-0.03% of ofF.S., the model of a controller is L J-X8000, the line laser measuring instrument is fixed on a third mounting table, the third mounting table can be driven by a third servo motor and a third lead screw sliding block pair to carry out position adjustment in the y axis direction, and the power of the third servo motor is 0.3 Kw.
The tested battery module is fixed on a first mounting table, the first mounting table can move in the x-axis direction under the driving of a first servo motor and a first lead screw sliding block pair, and the power of the first servo motor is 1.5 Kw.
In one embodiment of the present invention, the output shafts of the three servo motors 22, 32, 41 are connected to a driving sprocket or a driving pulley, one end of the lead screw in the three lead screw slider pairs 23, 33, 42 is connected to a driven sprocket or a driven pulley, and the driving sprocket and the driven sprocket are driven by a chain or the driving pulley or the driven pulley is driven by a belt.
Adopt above-mentioned laminate polymer core battery module utmost point ear welding quality detecting system to detect the busbar on the battery module, concrete step is:
step one, setting up qualified standards of weld positions, lugs and busbar height differences through an upper computer, and setting two-dimensional code rules used by different modules.
And step two, fixing the battery module with the electrode lugs subjected to laser welding on a first mounting table 43 of the battery module walking component 4.
Setting the vibration position (namely on the bus bar near the welding seam position) of the welding head 2101 of the ultrasonic welding machine during working, the triggering time is 1.5s, the vibration time is 0.6s, the time delay protection time is 1s, the triggering time is 2.5s and the pressure of a welding head falling cylinder is 0.25Mpa by the upper computer. Adjusting the rotating speed and the rotating direction of the first servo motor, the second servo motor and the third servo motor, driving the first lead screw sliding block pair to work through the first servo motor, controlling the advancing speed of the tested battery module on the first mounting table to be 10mm/s, and setting the amplitude of no-load sound wave of the ultrasonic generator to be 1.6A; a second lead screw sliding block pair is driven to work through a second servo motor, and a welding head of an ultrasonic welding machine on a second mounting table is adjusted to be positioned right above the busbar close to one side of the vibration leveling assembly; and a third lead screw sliding block pair is driven to work through a third servo motor, and a line laser measuring instrument sensing head on a third mounting platform is adjusted to be positioned right above the busbar close to one side of the detection assembly.
The system is started, the two-dimensional code of the battery module to be detected is scanned, when the battery module to be detected on the battery module walking assembly mounting table moves to a preset vibration position, a welding line close to one side of the ultrasonic welding machine is located below a welding head of the ultrasonic welding machine, and the welding head automatically falls down according to preset falling pressure and vibrates a specified position of a bus bar near the welding line; and when the preset vibration time is reached, stopping vibration, continuously pressing the welding head, photographing and scanning the welding seam region by the sensing head of the line laser measuring instrument, photographing to obtain the position of the welding seam, measuring to obtain the height difference between the lug and the busbar, sending the height difference to an upper computer, comparing the height difference with the standard position of the welding seam, when the difference between the test value and the standard value is within a preset range, detecting to be qualified, otherwise, detecting to be unqualified, and recording the unqualified position of the welding seam. And (4) lifting the welding head, continuing to advance the tested battery module, and repeating the vibration and measurement processes until the welding seam position of the single-side busbar on the tested battery module is completely vibrated and measured once.
Driving a second lead screw sliding block pair to work through a second servo motor, and adjusting a welding head of the ultrasonic welding machine on a second mounting platform to be positioned right above the bus bar on one side far away from the vibration leveling assembly; a third lead screw sliding block pair is driven to work through a third servo motor, and a sensing head of a line laser measuring instrument on a third mounting platform is adjusted to be positioned right above a bus bar on one side far away from the detection assembly; and driving the first lead screw sliding block pair to work through the first servo motor, controlling the tested battery module on the first mounting table to reversely advance to the initial end, and repeating the fourth step to completely vibrate and measure the welding seam position of the busbar on the other side of the tested battery module.
And if the width of the tested battery module is larger than the stroke of a welding head of the ultrasonic welding machine and/or a sensing head of the line laser measuring instrument, advancing the first mounting table to the position right above the jacking plate, lifting the jacking plate on the machine table, enabling the jacking plate to penetrate through the lower plate of the first mounting table and drive the upper plate of the first mounting table to ascend and rotate, enabling the tested battery module to rotate 180 degrees along with the upper plate, enabling the upper plate to fall and be fixed on the lower plate, then controlling the tested battery module on the first mounting table to reversely advance to the starting end, repeating the fourth step, and completely vibrating and measuring the welding seam position of the busbar on the other side of the tested battery module.
And (3) raising a jacking plate on the machine table, wherein the jacking plate penetrates through a lower plate of the first mounting table and drives an upper plate of the first mounting table to ascend and rotate, the tested battery module rotates 180 degrees along with the upper plate, the upper plate falls down and is fixed on the lower plate, then the tested battery module on the first mounting table is controlled to reversely advance to the initial end, the step 3) is repeated, and the welding seam position of the busbar on the other side of the tested battery module is completely vibrated and measured once.
And step six, according to the data recorded by the upper computer, the laser welding is carried out again at the position of the welding seam with unqualified detection in the previous process.
The foregoing lists merely illustrate specific embodiments of the invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (10)
1. A tab welding quality detection system for a battery module of a soft-package battery cell is characterized by comprising a machine table (6), a battery module walking assembly (4), a vibration leveling assembly (2), a detection assembly (3), a code scanning gun (5) and an upper computer (1);
the machine table (6) is provided with a first guide rail (44), the battery module walking assembly (4) is installed on the first guide rail (44), the vibration leveling assembly (2) and the detection assembly (3) are installed on the same side of the first guide rail (44), an ultrasonic welding machine welding head (2101) in the vibration leveling assembly (2) and a line laser measuring instrument sensing head (31) in the detection assembly (3) are located above the first guide rail (44), and the line laser measuring instrument sensing head (31) is arranged at the downstream position of the process of the ultrasonic welding machine welding head (2101); the battery module walking assembly (4), the vibration leveling assembly (2), the detection assembly (3) and the code scanning gun (5) are all connected with the upper computer (1);
the battery module walking assembly (4) comprises a first servo motor (41), a first lead screw sliding block pair (42) and a first mounting table (43) fixed on the first lead screw sliding block pair (42), the first lead screw sliding block pair (42) is mounted on a first guide rail (44), and the first servo motor (41) is connected with the first lead screw sliding block pair (42).
2. The system for detecting the welding quality of the soft-package-cell battery module tabs according to claim 1, wherein the first mounting table (43) of the battery module walking assembly (4) comprises an upper plate (4301) and a lower plate (4302), the lower plate (4302) is fixed on the first lead screw slider pair (42), and the upper plate (4301) is mounted on the lower plate (4302) and can rotate.
3. The system for detecting the welding quality of the soft-package-cell battery module tabs according to claim 2, wherein the machine table (6) is provided with a lifting plate (45), and when the first installation table (43) runs above the lifting plate (45), the lifting plate (45) can pass through the lower plate (4302) of the first installation table (43) and drive the upper plate (4301) of the first installation table (43) to lift and rotate.
4. The system for detecting the welding quality of the tab of the soft-package-cell battery module according to claim 1, wherein the leveling assembly (2) comprises an ultrasonic welding machine (21), a second servo motor (22), a second screw-slide pair (23) and a second mounting table (24) fixed on the second screw-slide pair (23); the ultrasonic welding machine (21) is fixed on the second mounting table (24); the second screw sliding block pair (23) is arranged on a second guide rail (25) on the machine table (6), and the second servo motor (22) is connected with the second screw sliding block pair (23); the second guide rail (25) is perpendicular to the first guide rail (44).
5. The system for detecting the welding quality of the pole lug of the soft-package-cell battery module as recited in claim 4, characterized in that the working surface of the welding head (2101) of the ultrasonic welding machine is a plane.
6. The system for detecting the welding quality of the tab of the soft-package-cell battery module according to claim 1, wherein the detection assembly (3) comprises a line laser measuring instrument sensing head (31), a third servo motor (32), a third screw slider pair (33) and a third mounting table (34) fixed on the third screw slider pair (33); the line laser measuring instrument sensing head (31) is fixed on a third mounting table (34); the third screw sliding block pair (33) is arranged on a third guide rail (35) on the machine table (6), and a third servo motor (32) is connected with the third screw sliding block pair (33); the third guide rail (35) is perpendicular to the first guide rail (44).
7. The detection method of the soft-package-cell battery module tab welding quality detection system of any one of claims 1 to 6, characterized by comprising the following steps:
1) fixing a tested battery module on a first mounting table (43) of a battery module walking assembly (4), wherein a lug on the tested battery module is welded with a bus bar;
2) the vibration position, the vibration time and the falling pressure of a welding head (2101) of the ultrasonic welding machine during working are set through an upper computer (1); the rotating speed and the rotating direction of the first servo motor (41), the second servo motor (22) and the third servo motor (32) are adjusted, the first lead screw sliding block pair (42) is driven to work through the first servo motor (41), and the advancing speed of the tested battery module on the first mounting platform (43) is controlled; a second lead screw slider pair (23) is driven to work through a second servo motor (22), and an ultrasonic welding machine welding head (2101) on a second mounting table (24) is adjusted to be positioned above the bus bar close to one side of the vibration leveling component (2); a third lead screw sliding block pair (33) is driven to work through a third servo motor (32), and a line laser measuring instrument sensing head (31) on a third mounting platform (34) is adjusted to be positioned right above a bus bar on one side close to the detection assembly (3);
3) the method comprises the steps that a system is started, when a battery module to be detected on a first mounting table (43) of a battery module walking assembly (4) moves to a preset vibration position, a welding line close to one side of an ultrasonic welding machine (21) is located below a welding head (2101) of the ultrasonic welding machine, and the welding head automatically falls down according to preset falling pressure and vibrates a bus bar designated position near the welding line; when the preset vibration time is reached, a welding head (2101) of the ultrasonic welding machine compresses the bus bar, a sensing head (31) of a line laser measuring instrument is used for photographing and scanning a welding seam area, the height difference between the pole lug and the bus bar is obtained through measurement, and the height difference is sent to an upper computer (1); the welding head (2101) of the ultrasonic welding machine is lifted, the tested battery module continues to advance, and the vibration and measurement processes are repeated until the welding seam position of the single-side bus bar on the tested battery module is completely vibrated and measured once;
4) a second lead screw slider pair (23) is driven to work through a second servo motor (22), and an ultrasonic welding machine welding head (2101) on a second mounting table (24) is adjusted to be positioned above the bus bar on one side far away from the vibration flat component (2); a third lead screw sliding block pair (33) is driven to work through a third servo motor (32), and a line laser measuring instrument sensing head (31) on a third mounting platform (34) is adjusted to be positioned right above a bus bar on one side far away from the detection assembly (3); the first lead screw sliding block pair (42) is driven to work through the first servo motor (41), the tested battery module on the first mounting table (43) is controlled to reversely advance to the starting end, then the step 3 is repeated, and the welding seam position of the busbar on the other side of the tested battery module is completely vibrated and measured once.
8. The detection method of the soft-package-cell battery module tab welding quality detection system according to claim 7, characterized in that when the width of the battery module to be detected is larger than the stroke of a welding head of an ultrasonic welding machine and/or a sensing head of a line laser measuring instrument, a lifting plate (45) on a machine table is lifted, the lifting plate (45) penetrates through a lower plate (4302) of a first mounting table (43) and drives an upper plate (4301) of the first mounting table (43) to ascend and rotate, the battery module to be detected rotates 180 degrees along with the upper plate, the upper plate (4301) falls and is fixed on the lower plate (4302), then the battery module to be detected on the first mounting table (43) is controlled to reversely advance to a starting end, the step 3 is repeated, and the weld joint position of a busbar on the other side of the battery module to be detected is completely vibrated and measured.
9. The detection method of the soft-package-cell battery module tab welding quality detection system according to claim 7, wherein the traveling speed of the battery module to be detected is 10 mm/s.
10. The detection method of the soft-package-cell battery module tab welding quality detection system of claim 7, characterized in that the vibration time of the welding head (2101) of the ultrasonic welding machine is 0.6s, and the falling pressure is 0.25 Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111951240A (en) * | 2020-08-05 | 2020-11-17 | 珠海博明视觉科技有限公司 | Welding mark detection and height measurement method based on line laser |
| CN115950488A (en) * | 2023-03-10 | 2023-04-11 | 超音速人工智能科技股份有限公司 | Lithium battery full-line production quality detection method, system and platform |
| WO2023087552A1 (en) * | 2021-11-16 | 2023-05-25 | 江苏时代新能源科技有限公司 | Battery, electric device, and welding deviation detecting device and method |
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2020
- 2020-04-27 CN CN202010344239.6A patent/CN111398296A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111951240A (en) * | 2020-08-05 | 2020-11-17 | 珠海博明视觉科技有限公司 | Welding mark detection and height measurement method based on line laser |
| CN111951240B (en) * | 2020-08-05 | 2024-02-13 | 珠海博明视觉科技有限公司 | Welding mark detection and height measurement method based on line laser |
| WO2023087552A1 (en) * | 2021-11-16 | 2023-05-25 | 江苏时代新能源科技有限公司 | Battery, electric device, and welding deviation detecting device and method |
| CN115950488A (en) * | 2023-03-10 | 2023-04-11 | 超音速人工智能科技股份有限公司 | Lithium battery full-line production quality detection method, system and platform |
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