CN116551147A - Method for pre-treating welding of positive and negative aluminum wires of battery cells of cylindrical lithium ion battery pack - Google Patents
Method for pre-treating welding of positive and negative aluminum wires of battery cells of cylindrical lithium ion battery pack Download PDFInfo
- Publication number
- CN116551147A CN116551147A CN202310693779.9A CN202310693779A CN116551147A CN 116551147 A CN116551147 A CN 116551147A CN 202310693779 A CN202310693779 A CN 202310693779A CN 116551147 A CN116551147 A CN 116551147A
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- cylindrical lithium
- ion battery
- continuous pulse
- pulse laser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 116
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 116
- 238000003466 welding Methods 0.000 title claims abstract description 75
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 48
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 238000007781 pre-processing Methods 0.000 claims abstract description 10
- 238000001125 extrusion Methods 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract description 10
- 238000002679 ablation Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 11
- 230000001678 irradiating effect Effects 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 239000000428 dust Substances 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 210000004243 sweat Anatomy 0.000 description 5
- 229920000742 Cotton Polymers 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000002203 pretreatment Methods 0.000 description 3
- 230000008439 repair process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- B23K20/26—Auxiliary equipment
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to the technical field of battery pack manufacturing, and discloses a method for welding and preprocessing positive and negative aluminum wires of a battery cell of a cylindrical lithium ion battery pack, which specifically comprises the following steps: s11: sequentially placing cylindrical lithium ion batteries on a pretreatment conveying belt; s12: adjusting the laser energy percentage emitted by the continuous pulse laser, and controlling the laser emission time of the continuous pulse laser so that the continuous pulse laser is arranged above the pretreatment conveying belt to clean the positive polar surface of the cylindrical lithium ion battery; s13: the pretreatment conveying belt drives the cylindrical lithium ion battery to move to a movable clamping mechanism with a lifting function. According to the invention, the laser cleaning of the positive and negative polar surfaces of the battery cells of the cylindrical lithium ion battery pack is ensured by adjusting the laser energy percentage of the continuous pulse laser, the laser emission time of the continuous pulse laser and the laser focal point position of the continuous pulse laser to control the ablation intensity of the positive polar surface of the cylindrical lithium ion battery or the negative polar surface of the cylindrical lithium ion battery.
Description
Technical Field
The invention relates to the technical field of battery pack manufacturing, in particular to a method for pre-treating positive and negative aluminum wires of a battery cell of a cylindrical lithium ion battery pack by welding.
Background
In the process of manufacturing the cylindrical lithium ion battery into a battery pack, an aluminum wire ultrasonic welding process method in the semiconductor industry is introduced to realize serial-parallel connection of single cylindrical lithium ion batteries, but because the cylindrical lithium ion batteries in the battery industry are sprayed with rust-proof oil before leaving a factory for preventing battery cells from rusting, a rust-proof oil layer exists on the anode and the cathode of the cylindrical lithium ion battery, and the single cylindrical lithium ion battery is stained with oil stains, sweat, dust, dirt impurities and other undesirable foreign matters in the processes of assembly and group carrying, transferring and assembly operation, the oil stains, sweat, dust and dirt impurities can have adverse effects on the ultrasonic welding of the anode and the cathode of the battery cells of the cylindrical lithium ion battery pack, and the aluminum wires can not be welded to the anode and the cathode of the battery cells of the cylindrical lithium ion battery pack due to poor welding and heavy welding.
At present, the ultrasonic welding yield of the aluminum wires is improved by a process method of wiping positive and negative electrode aluminum wires of the cylindrical lithium ion battery by using cotton cloth to dip alcohol before ultrasonic welding of the positive and negative electrode aluminum wires of the cylindrical lithium ion battery, but the conventional process method of wiping the aluminum wires by using alcohol often has the problems that whether wiping is not quantitatively confirmed after wiping, and even secondary pollution is caused to the positive and negative electrode surfaces of the cylindrical lithium ion battery after wiping, so that the improvement of the welding yield is not obvious when the positive and negative electrodes of the battery cell of the cylindrical lithium ion battery are subjected to ultrasonic welding of the aluminum wires, and even the welding yield is lower.
Disclosure of Invention
The invention aims to provide a method for pre-processing welding of positive and negative aluminum wires of a battery cell of a cylindrical lithium ion battery pack, which ensures that positive and negative surfaces of the battery cell of the cylindrical lithium ion battery pack are cleaned by laser, thereby improving the ultrasonic welding yield of the positive and negative aluminum wires of the battery cell of the cylindrical lithium ion battery pack, and aims to solve the problems that the process method for wiping the battery cell of the cylindrical lithium ion battery in the prior art often cannot quantitatively confirm whether the wiping is clean or not after the wiping, and even causes secondary pollution to the positive and negative surfaces of the cylindrical lithium ion battery after the wiping.
The invention discloses a method for welding and preprocessing positive and negative aluminum wires of a battery cell of a cylindrical lithium ion battery pack, which specifically comprises the following steps:
s11: sequentially placing cylindrical lithium ion batteries on a pretreatment conveying belt;
s12: adjusting the laser energy percentage emitted by the continuous pulse laser, and controlling the laser emission time of the continuous pulse laser so that the continuous pulse laser is arranged above the pretreatment conveying belt to clean the positive polar surface of the cylindrical lithium ion battery;
s13: the pretreatment conveying belt drives the cylindrical lithium ion battery to move to a movable clamping mechanism with a lifting function;
s14: the movable clamping mechanism clamps the cylindrical lithium ion battery and moves the cylindrical lithium ion battery to the position right above the second continuous pulse laser, and the second continuous pulse laser cleans the negative polarity surface of the cylindrical lithium ion battery at the moment;
s15: and after the negative electrode surface of the cylindrical lithium ion battery is cleaned, placing the cylindrical lithium ion battery on a welding conveyor belt for a welding procedure.
Further, the laser emitted by the continuous pulse laser is vertically irradiated on the positive polarity surface of the cylindrical lithium ion battery and the negative polarity surface of the cylindrical lithium ion battery, the percentage of the laser emitted by the continuous pulse laser is 40-80%, and the laser emitted time range of the continuous pulse laser is 50-100 ms.
Further, the continuous pulse laser generates continuous pulse laser emitting laser focuses when emitting laser, and the distance between the continuous pulse laser emitting laser focuses and the positive polar surface of the cylindrical lithium ion battery or the negative polar surface of the cylindrical lithium ion battery is set to be 0-0.5 mm.
Further, the maximum emission power of the continuous pulse laser is 20W, and the actual emission power is 20 x, and the laser energy percentage value emitted by the continuous pulse laser is adjusted.
Further, the movable clamping mechanism comprises a fixed plate, a sliding groove is formed in the upper portion of the fixed plate, and a sliding block is arranged in the sliding groove.
Further, a sliding sleeve is arranged in the middle of the sliding block, and a hydraulic rod is sleeved in the sliding sleeve.
Further, locating plates are vertically arranged at two ends of one side of the sliding block, clamping grooves are formed between the locating plates, connecting plates are arranged in the clamping grooves, and torsion spring pins are arranged on one side of the connecting plates.
Further, the two sides of the torsional spring pin are hinged with clamping arms, the two clamping arms are all arc-shaped, and an anti-slip layer is arranged on the inner wall of the clamping arms.
Further, a connecting pin is arranged between the connecting plate and the positioning plate in a penetrating manner, two sides of the connecting pin extend to the outer side of the positioning plate, a limited head is arranged at the end head of the connecting pin, and a pin movable groove matched with the connecting pin is formed in the positioning plate.
Further, two opposite side ends of the positioning plate are provided with extrusion surfaces, the extrusion surfaces are extruded with the clamping arms when the clamping arms shrink, and the clamping arms are extruded to clamp and fix the cylindrical lithium ion battery.
Compared with the prior art ， The method for welding and preprocessing the anode and cathode aluminum wires of the battery cell of the cylindrical lithium ion battery pack has the following beneficial effects:
1. the laser energy percentage of the continuous pulse laser, the laser emitting time of the continuous pulse laser and the laser focal point position of the continuous pulse laser are adjusted to control the ablation intensity of the positive polar surface of the cylindrical lithium ion battery or the negative polar surface of the cylindrical lithium ion battery, so that the laser cleaning and cleaning of the positive polar surface and the negative polar surface of the battery cell of the cylindrical lithium ion battery are ensured, and the ultrasonic welding yield of the positive polar aluminum wire and the negative polar aluminum wire of the battery cell of the cylindrical lithium ion battery is improved;
2. the technical method for vertically irradiating the positive and negative polar surfaces of the cylindrical lithium ion battery by using the continuous pulse laser emitted laser can quickly ablate bad foreign matters such as oil stain, sweat, dust, dirt impurities and the like remained on the positive and negative polar surfaces of the cylindrical lithium ion battery, so that the clean positive and negative polar surfaces of the battery core are ensured to be subjected to aluminum wire ultrasonic welding, the arranged movable clamping mechanism has a lifting function, the cylindrical lithium ion battery is sleeved by lifting, then the movable extrusion clamping is performed to realize the cleaning of the other electrode surface, and the cleaned battery is placed on a welding conveyor belt for the next procedure, so that the degree of mechanization is high.
Drawings
FIG. 1 is a flow chart of a method for pre-processing aluminum wires for welding positive and negative electrodes of a battery cell of a cylindrical lithium ion battery set;
fig. 2 is a schematic diagram of pretreatment equipment in a pretreatment method for welding positive and negative aluminum wires of a battery cell of a cylindrical lithium ion battery set;
FIG. 3 is a schematic diagram of a continuous pulse laser processing method in a pretreatment method for welding positive and negative aluminum wires of a battery cell of a cylindrical lithium ion battery set;
fig. 4 is a schematic structural diagram of a mobile clamping mechanism in the method for welding and preprocessing the anode and cathode aluminum wires of the battery cells of the cylindrical lithium ion battery pack.
In the figure: the laser comprises a 1-continuous pulse laser, a 2-laser, a 3-continuous pulse laser emitting laser focus, a 4-cylindrical lithium ion battery positive polarity face, a 5-cylindrical lithium ion battery, a 6-cylindrical lithium ion battery negative polarity face, an 11-pretreatment conveying belt, a 12-movement clamping mechanism, a 121-fixing plate, a 122-sliding groove, a 123-sliding block, a 124-hydraulic rod, a 125-positioning plate, a 126-connecting plate, a 127-torsion spring pin, a 128-clamping arm, a 129-connecting pin, a 1210-pin movable groove, a 1211-sliding sleeve and a 13-welding conveying belt.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The implementation of the present invention will be described in detail below with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limiting the present invention, and specific meanings of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.
Examples
Referring to fig. 1-4, the method for welding and pre-treating the positive and negative aluminum wires of the battery cell of the cylindrical lithium ion battery pack specifically comprises the following steps:
s11: sequentially placing the cylindrical lithium ion batteries 5 on a pretreatment conveying belt 11;
s12: adjusting the laser energy percentage emitted by the continuous pulse laser, and controlling the laser emission time of the continuous pulse laser so that the continuous pulse laser 1 is arranged above the pretreatment conveying belt 11 to clean the positive polar surface 4 of the cylindrical lithium ion battery;
s13: the pretreatment conveying belt 11 drives the cylindrical lithium ion battery 5 to move to a movable clamping mechanism 12 with a lifting function;
s14: the movable clamping mechanism 12 clamps the cylindrical lithium ion battery 5 to move to the position right above the second continuous pulse laser 1, and the second continuous pulse laser 1 cleans the negative polarity surface 6 of the cylindrical lithium ion battery at the moment;
s15: after the negative electrode surface 6 of the cylindrical lithium ion battery is cleaned, the cylindrical lithium ion battery 5 is placed on a welding conveyor belt 13 for a welding procedure, the continuous pulse laser 1 emits laser 2 to vertically irradiate the positive electrode surface 4 of the cylindrical lithium ion battery and the negative electrode surface 6 of the cylindrical lithium ion battery, the energy percentage of the continuous pulse laser emitted by the continuous pulse laser is 40-80%, the time range of the continuous pulse laser emitted by the continuous pulse laser is 50-100 ms, the continuous pulse laser 1 generates a continuous pulse laser emitted laser focus 3 when the continuous pulse laser is emitted, and the distance between the continuous pulse laser emitted laser focus and the positive electrode surface 4 of the cylindrical lithium ion battery or the negative electrode surface 6 of the cylindrical lithium ion battery is set to be 0-0.5 mm.
In the present embodiment, the maximum emission power of the continuous pulse laser 1 is 20W, and the actual emission power thereof is 20 x, and the percentage value of the laser energy emitted by the continuous pulse laser is adjusted.
In this embodiment, the movable clamping mechanism 12 includes a fixed plate 121, a chute 122 is provided on the upper portion of the fixed plate 121, a slide block 123 is provided in the chute 122, a slide sleeve 1211 is provided in the middle of the slide block 123, a hydraulic rod 124 is provided in the slide sleeve 1211, positioning plates 125 are vertically provided at two ends of one side of the slide block 123, a clamping groove is formed between the positioning plates 125, a connecting plate 126 is provided in the clamping groove, a torsion spring pin 127 is provided at one side of the connecting plate 126, clamping arms 128 are hinged at two sides of the torsion spring pin 127, and both clamping arms 128 are arc-shaped, and an anti-slip layer is provided on the inner wall of the clamping arms 128.
Specifically, for the movable clamping mechanism 12 with lifting function, the tail end of the hydraulic rod 124 of the movable clamping mechanism can be arranged on the screw rod sliding block to realize the movement, and the lifting hydraulic cylinder is arranged on the screw rod sliding block to realize the effect that the movable clamping mechanism 12 can reach, so that the clamping effect of the clamping arm 128 is realized when the hydraulic rod 124 is contracted by matching the sliding block 123 with the sliding groove 122, the sliding block 123 and the sliding groove 122 are not separated, and the lower part of the sliding block 123 penetrates through the sliding groove 122, so that the bottom of the sliding block 123 is fallen into the sliding groove 122.
Specifically, the support points at the two ends of the torsion spring pin 127 are located at the inner sides of the clamping arms 128, so that when the clamping arms 128 are not subjected to external force, the force acted by the torsion spring pin 127 is the tension of the clamping arms 128, the clamping arms 128 can be automatically clamped when being extruded, the torsion spring pin 127 is pressed and deformed, and after the external force is removed, the clamping arms 128 can be again opened under the action of the torsion spring pin 127.
In this embodiment, a connecting pin 129 is disposed between the connecting plate 126 and the positioning plate 125, two sides of the connecting pin 129 extend to the outer side of the positioning plate 125, a limiting head is disposed at an end of the connecting pin 129, a pin moving groove 1210 adapted to the connecting pin 129 is disposed on the positioning plate 125, one end of each of the two positioning plates 125 opposite to each other is provided with an extrusion surface, and the extrusion surfaces are extruded with the clamping arms 128 when the clamping arms 128 shrink, so that the clamping arms 128 clamp to clamp and fix the cylindrical lithium ion battery 5.
According to the technical scheme, the laser cleaning and cleaning of the positive and negative polar surfaces of the battery core of the cylindrical lithium ion battery are ensured by adjusting the laser energy percentage emitted by the continuous pulse laser, the laser emitting time of the continuous pulse laser and the ablation intensity of the positive polar surface 4 or the negative polar surface 6 of the cylindrical lithium ion battery controlled by the laser emitting focal point position of the continuous pulse laser, the technical method of vertically irradiating the positive and negative polar surfaces of the cylindrical lithium ion battery by using the laser emitting by the continuous pulse laser 1 can quickly ablate oil stains, sweat, dust, dirt impurities and other undesirable foreign matters remained on the positive and negative polar surfaces of the cylindrical lithium ion battery, thereby ensuring that the clean positive and negative polar surfaces of the battery core are subjected to aluminum wire ultrasonic welding, the arranged movable clamping mechanism 12 has a lifting function, is sleeved into the cylindrical lithium ion battery 5 by lifting, then is subjected to movable extrusion clamping to realize the cleaning of the other electrode surface, and then is placed on a welding conveyor belt for the next procedure, and the degree of mechanization is high 。
In this embodiment, the whole operation process may be controlled by a computer, and a PLC or the like, so as to implement automatic operation control, and in each operation link, signal feedback may be performed by setting a sensor, so as to implement sequential steps, which are conventional knowledge of current automatic control, and are not described in detail in this embodiment.
Experimental example
The inventor carries out experiments aiming at the technical scheme, 4 18650 cylindrical lithium ion battery pack samples are manufactured, all the battery cells used by the 4 18650 cylindrical lithium ion battery pack samples are the same batch battery cells, the states of the positive and negative polar surfaces of all the battery cells are the same, then the 4 samples are respectively subjected to cleaning of the positive and negative polar surfaces of the battery cells and ultrasonic welding of the positive and negative polar surfaces of the battery cells according to the following technological methods, the welding uses the same aluminum wire ultrasonic welding machine for operation, the aluminum wires used for welding are the same aluminum wire coil, and the operators are the same:
the positive and negative polar surfaces of the battery cells are cleaned by dipping clean cotton cloth in 99.99% pure alcohol, and then the cleaned positive and negative polar surfaces of the battery cells are subjected to aluminum wire ultrasonic welding by an aluminum wire ultrasonic welding machine;
the sample (2) uses a continuous pulse laser to vertically irradiate the anode and the cathode of a cylindrical lithium ion battery cell, the percentage of laser energy emitted by the continuous pulse laser is 40 percent, the laser emitting time of the continuous pulse laser is 100ms, the laser emitting focus of the continuous pulse laser is positioned above the anode and the cathode of the battery cell by 0mm, and then an aluminum wire ultrasonic welding machine is used for carrying out aluminum wire ultrasonic welding on the wiped anode and the cathode of the battery cell;
the sample (3) uses a continuous pulse laser to vertically irradiate the positive electrode and the negative electrode of a cylindrical lithium ion battery cell, the percentage of laser energy emitted by the continuous pulse laser is 60 percent, the laser emitting time of the continuous pulse laser is 80ms, the laser emitting focus of the continuous pulse laser is positioned 0.25mm above the positive electrode and the negative electrode surfaces of the battery cell, and then an aluminum wire ultrasonic welding machine is used for carrying out aluminum wire ultrasonic welding on the positive electrode and the negative electrode surfaces of the wiped battery cell;
the sample (4) uses a continuous pulse laser to vertically irradiate the positive electrode and the negative electrode of a cylindrical lithium ion battery cell, the percentage of laser energy emitted by the continuous pulse laser is 80 percent, the laser emitting time of the continuous pulse laser is 50ms, the laser emitting focus of the continuous pulse laser is positioned 0.5mm above the positive electrode surface and the negative electrode surface of the battery cell, and then an aluminum wire ultrasonic welding machine is used for carrying out aluminum wire ultrasonic welding on the wiped positive electrode surface and the negative electrode surface of the battery cell;
after all the 4 samples are welded by ultrasonic aluminum wires, the 4 samples are sequentially placed into the same aluminum wire welding tension detector for ultrasonic welding tension test, and the tensile test qualification standard is as follows: when the tensile force of the aluminum wires reaches 250g, the ultrasonic welding legs of the aluminum wires are qualified without any warping, pulling and breaking.
Through the sample test, the pretreatment method for welding positive and negative aluminum wires of the battery cells of the cylindrical lithium ion battery pack, which is implemented by the last 4 samples, and the ultrasonic welding yield of the measured aluminum wires are shown in table 1.
Table 1:
in the first table, experimental example 1 is a process method for improving the ultrasonic welding yield of positive and negative aluminum wires of a battery cell of a cylindrical lithium ion battery pack in the industry, wherein the positive and negative surfaces of the battery cell of the cylindrical lithium ion battery pack are wiped by clean cotton cloth dipped with 99.99% pure alcohol and then subjected to ultrasonic welding of the aluminum wires;
the process method for improving the ultrasonic welding yield of the anode and cathode aluminum wires of the battery cell of the cylindrical lithium ion battery pack in experimental example 2 comprises the steps of vertically irradiating the anode and cathode of the cylindrical lithium ion battery cell by using a continuous pulse laser, wherein the percentage of laser energy emitted by the continuous pulse laser is 40%, the laser emitting time of the continuous pulse laser is 100ms, the laser emitting focus of the continuous pulse laser is positioned above the anode and cathode surfaces of the battery cell by 0mm, and then performing ultrasonic welding on the wiped anode and cathode surfaces of the battery cell by using an aluminum wire ultrasonic welding machine;
the process method for improving the ultrasonic welding yield of the anode and cathode aluminum wires of the battery cell of the cylindrical lithium ion battery pack in experimental example 3 comprises the steps of vertically irradiating the anode and cathode of the cylindrical lithium ion battery cell by using a continuous pulse laser, wherein the percentage of laser energy emitted by the continuous pulse laser is 60%, the laser emitting time of the continuous pulse laser is 80ms, the laser emitting focus of the continuous pulse laser is 0.25mm above the anode and cathode surfaces of the battery cell, and then performing ultrasonic welding on the wiped anode and cathode surfaces of the battery cell by using an aluminum wire ultrasonic welding machine;
the process method for improving the ultrasonic welding yield of the anode and cathode aluminum wires of the battery cell of the cylindrical lithium ion battery pack in experimental example 4 comprises the steps of vertically irradiating the anode and cathode of the cylindrical lithium ion battery cell by using a continuous pulse laser, wherein the percentage of laser energy emitted by the continuous pulse laser is 80%, the laser emitting time of the continuous pulse laser is 50ms, the laser emitting focus of the continuous pulse laser is 0.5mm above the anode and cathode surfaces of the battery cell, and then performing ultrasonic welding on the wiped anode and cathode surfaces of the battery cell by using an aluminum wire ultrasonic welding machine;
the aluminum wire welding yield results in table one show: the invention uses a continuous pulse laser to vertically irradiate the positive and negative poles of the cylindrical lithium ion battery core, the percentage range of laser energy emitted by the continuous pulse laser is 40% -80%, the time range of laser emitted by the continuous pulse laser is 50-100 ms, the laser emitted by the continuous pulse laser is 0-0.5 mm above the positive and negative pole faces of the battery core, the welding yield of aluminum wires on the positive and negative pole faces of the cylindrical battery core of the obtained samples (2) (3) (4) is 98.6-99.5%, and compared with the ultrasonic welding yield of the aluminum wires of the sample (1) which is obtained by wiping the positive and negative pole faces of the cylindrical battery core with alcohol in the traditional industry, the ultrasonic welding yield of the aluminum wires is greatly improved by 46.8%, so that the reworking and repair operation intensity of staff is reduced, unnecessary reworking and repair time is reduced, the production cost is reduced, and the ultrasonic welding quality of the positive and negative pole aluminum wires of the battery core of the cylindrical lithium ion battery is improved.
The laser energy percentage of the continuous pulse laser, the laser emitting time of the continuous pulse laser and the laser emitting focal point position of the continuous pulse laser are adjusted to control the ablation intensity of the positive polar surface 4 or the negative polar surface 6 of the cylindrical lithium ion battery, so that the cleaning and cleaning of the positive and negative polar surfaces of the battery cells of the cylindrical lithium ion battery are ensured, and the technical method of vertically irradiating the positive and negative polar surfaces of the cylindrical lithium ion battery by using the laser emitted by the continuous pulse laser 1 can rapidly ablate oil stains, sweat, dust, dirt impurities and other undesirable foreign matters remained on the positive and negative polar surfaces of the cylindrical lithium ion battery, thereby ensuring that the clean positive and negative polar surfaces of the battery cells are subjected to aluminum wire ultrasonic welding.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. The method for welding and preprocessing the anode and cathode aluminum wires of the battery cells of the cylindrical lithium ion battery pack is characterized by comprising the following steps of:
s11: sequentially placing cylindrical lithium ion batteries on a pretreatment conveying belt;
s12: adjusting the laser energy percentage emitted by the continuous pulse laser, and controlling the laser emission time of the continuous pulse laser so that the continuous pulse laser is arranged above the pretreatment conveying belt to clean the positive polar surface of the cylindrical lithium ion battery;
s13: the pretreatment conveying belt drives the cylindrical lithium ion battery to move to a movable clamping mechanism with a lifting function;
s14: the movable clamping mechanism clamps the cylindrical lithium ion battery and moves the cylindrical lithium ion battery to the position right above the second continuous pulse laser, and the second continuous pulse laser cleans the negative polarity surface of the cylindrical lithium ion battery at the moment;
s15: and after the negative electrode surface of the cylindrical lithium ion battery is cleaned, placing the cylindrical lithium ion battery on a welding conveyor belt for a welding procedure.
2. The method for pre-processing the positive and negative aluminum wires of the battery cells of the cylindrical lithium ion battery pack according to claim 1, wherein the continuous pulse laser is used for emitting laser light on the positive polarity surface of the cylindrical lithium ion battery and the negative polarity surface of the cylindrical lithium ion battery, the percentage of the laser energy emitted by the continuous pulse laser is 40-80%, and the time range of the laser emission of the continuous pulse laser is 50-100 ms.
3. The method for pre-processing the aluminum wire for the positive electrode and the negative electrode of the battery cell of the cylindrical lithium ion battery set according to claim 2, wherein the continuous pulse laser generates continuous pulse laser emitting laser focuses when emitting laser, and the distance between the continuous pulse laser emitting laser focuses and the positive electrode surface of the cylindrical lithium ion battery or the negative electrode surface of the cylindrical lithium ion battery is set to be 0-0.5 mm.
4. The method for pre-processing aluminum wire for positive and negative electrodes of a battery cell of a cylindrical lithium ion battery set according to claim 3, wherein the maximum emission power of the continuous pulse laser is 20W, and the actual emission power of the continuous pulse laser is 20 x, and the laser energy percentage value emitted by the continuous pulse laser is adjusted.
5. The method for welding and pre-treating positive and negative aluminum wires of battery cells of a cylindrical lithium ion battery pack according to any one of claims 1 to 4, wherein the movable clamping mechanism comprises a fixed plate, a chute is arranged at the upper part of the fixed plate, and a sliding block is arranged in the chute.
6. The method for welding and pre-treating positive and negative aluminum wires of a battery cell of a cylindrical lithium ion battery pack according to claim 5, wherein a sliding sleeve is arranged in the middle of the sliding block, and a hydraulic rod is sleeved in the sliding sleeve.
7. The method for welding pretreatment of positive and negative aluminum wires of battery cells of a cylindrical lithium ion battery pack according to claim 6, wherein positioning plates are vertically arranged at two ends of one side of the sliding block, a clamping groove is formed between the positioning plates, a connecting plate is arranged in the clamping groove, and a torsion spring pin is arranged at one side of the connecting plate.
8. The method for welding and pre-treating positive and negative aluminum wires of a battery cell of a cylindrical lithium ion battery pack according to claim 7, wherein clamping arms are hinged to two sides of the torsion spring pin, the two clamping arms are all arc-shaped, and an anti-slip layer is arranged on the inner wall of the clamping arms.
9. The method for welding pretreatment of positive and negative aluminum wires of battery cells of a cylindrical lithium ion battery pack according to claim 8, wherein connecting pins are arranged between the connecting plates and the positioning plates in a penetrating manner, both sides of each connecting pin extend to the outer sides of the positioning plates, limiting heads are arranged at the ends of the connecting pins, and pin movable grooves matched with the connecting pins are formed in the positioning plates.
10. The method for welding pretreatment of positive and negative aluminum wires of battery cells of a cylindrical lithium ion battery pack according to claim 9, wherein the ends of one side, opposite to each other, of the two positioning plates are respectively provided with an extrusion surface, the extrusion surfaces are extruded with the clamping arms when the clamping arms shrink, and the clamping of the extrusion clamping arms is completed to clamp and fix the cylindrical lithium ion battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310693779.9A CN116551147A (en) | 2023-06-12 | 2023-06-12 | Method for pre-treating welding of positive and negative aluminum wires of battery cells of cylindrical lithium ion battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310693779.9A CN116551147A (en) | 2023-06-12 | 2023-06-12 | Method for pre-treating welding of positive and negative aluminum wires of battery cells of cylindrical lithium ion battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116551147A true CN116551147A (en) | 2023-08-08 |
Family
ID=87498316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310693779.9A Pending CN116551147A (en) | 2023-06-12 | 2023-06-12 | Method for pre-treating welding of positive and negative aluminum wires of battery cells of cylindrical lithium ion battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116551147A (en) |
-
2023
- 2023-06-12 CN CN202310693779.9A patent/CN116551147A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11306408B2 (en) | Device for microelectrodeposition through laser assisted flexible following tool electrode and deposition method using the device thereof | |
| CN104439676B (en) | CLF-1 steel thick plate electro-beam welding process | |
| CN112846499A (en) | Ultrafast laser welding method and system for glass and metal packaging | |
| CN108788433A (en) | Vacuum electron beam welding method and vacuum electron beam welding system for aluminium alloy | |
| CN217750074U (en) | Resistance spot welding auxiliary positioning device | |
| CN116551147A (en) | Method for pre-treating welding of positive and negative aluminum wires of battery cells of cylindrical lithium ion battery pack | |
| CN105921887A (en) | Device and method for manufacturing three-dimensional structure battery based on ultrafast laser | |
| CN111203631A (en) | Intelligent detection laser repair method for display screen | |
| CN112975025B (en) | Welding method and device for repairing solar cell string | |
| CN210209064U (en) | Laser welding device for positive and negative pole pieces and lead-out pole lugs of lithium battery cell | |
| CN110153558B (en) | Laser welding jig and method for positive and negative pole pieces and lead-out pole lugs of lithium battery cell | |
| CN115198226B (en) | Method for improving corrosion resistance of metal based on femtosecond laser induced surface oxide layer | |
| CN105798467A (en) | Laser welding and cutting production line | |
| CN218122054U (en) | Discharging and flattening device for capacitor aging | |
| CN218632110U (en) | Battery cell processing equipment | |
| CN114309910B (en) | Electron beam welding process and postweld heat treatment method for copper-chromium-zirconium alloy | |
| CN210649107U (en) | Laser welding protection positioning device | |
| CN205703247U (en) | Aluminum turns the welder of non-aluminum metal lug | |
| CN210967429U (en) | Automobile spot welding fixture | |
| CN220362206U (en) | Anode steel claw welding maintenance system | |
| CN218533183U (en) | Automatic equipment for welding battery binding post by energy beam | |
| CN214953120U (en) | Detection device for laser chip | |
| CN220934560U (en) | Automatic production line for plug hook welding processing | |
| CN210209104U (en) | Pre-welding pretreatment device for improving laser welding strength | |
| CN116713691A (en) | Anode steel claw welding maintenance system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |