Laser welding device capable of removing dust and cooling
By adopting a nitrogen heating system and a blow-sucking air system in the laser welding device, the problems of energy instability and dummy welding in electrode column welding are solved, and higher yield and lower maintenance costs are achieved.
Patent Information
- Application Number
- CN202411533484.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-02-07
AI Technical Summary
The existing laser welding technology is prone to energy instability, false welding, liquid leakage and damage to the protective lens during electrode column welding, resulting in low yield and high maintenance costs.
A laser welding device that can remove dust and cool down is designed. The nitrogen heating system is used to preheat nitrogen inject into the molten pool, combining the blowing and air suction effects to clean foreign objects, and the lenses are cleaned and cooled through the collimation mirror system to prevent welding joints and lenses from being worn out. damage.
It effectively prevents the melt pool explosion point, oxidation and dummy, reduces welding slag and smoke, improves welding stability and yield rate, and reduces maintenance costs.
Smart Images
Figure CN119387825A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a technical field, and in particular to a laser welding device capable of removing dust and reducing temperature. Background Art
[0002] With the advancement of new energy technology and scale-up, the safety and service life of batteries are constantly improving. Therefore, continuous optimization is carried out in terms of battery cell manufacturing and PACK assembly. The PACK process mainly includes battery cell selection, module installation and laser welding, and finally the assembly of various accessories. For the module, it is mainly the laser welding process of the pole piece, which is a crucial process in the whole link. It includes the position of the pole piece module, the energy parameters of the laser, the specifications of the melting depth and width, the loss of equipment accessories during welding, and the rework cost of the qualified rate. These are the main ways to reduce costs and increase efficiency.
[0003] In existing laser welding, direct electrode pole welding may encounter problems such as battery cell pole welding penetration and leakage caused by unstable energy, cold welding caused by adding low-temperature nitrogen, and damage to the protective lens when the temperature is continuously high. These problems will affect the yield rate of electrode pole welding and increase the maintenance cost of electrode welding. Summary of the invention
[0004] The technical problem to be solved by the present invention is to provide a laser welding device capable of removing dust and reducing temperature to solve the problem of low welding yield of electrode poles.
[0005] Based on the technical problems existing in the background technology, the present invention proposes a laser welding device capable of dust removal and temperature reduction, comprising a workbench and a driving system installed on the workbench, wherein the driving system is connected to a vertical cylinder system on the side, the end of the vertical cylinder system is connected to a welding system, the welding system is connected to a nitrogen heating system, and a collimating mirror system is arranged above the welding system.
[0006] Preferably, the driving system includes a bracket, a track and a slider installed on a workbench, the track is installed on the side of the bracket, the slider can slide on the side of the bracket through the track, the track has a screw rod that can control the horizontal sliding of the slider, the end of the track is connected to a power motor that controls the rotation of the screw rod, and the side of the slider away from the bracket is connected to an insulating plate.
[0007] Preferably, the vertical cylinder system includes a longitudinally driven cylinder, a pressure plate, a pressure head fixing plate and a guide rail, the cylinder is connected to a side of the insulating plate away from the bracket, the pressure plate is connected to the driving end of the cylinder, the guide rail is arranged on the side of the pressure plate, the pressure head fixing plate slides longitudinally on the pressure plate relative to the guide rail, the pressure plate has a protrusion on one side of the guide rail, a guide column passing through the protrusion is connected above the pressure head fixing plate, a first elastic member is sleeved on the guide column, and the two ends of the first elastic member respectively abut the pressure head fixing plate and the protrusion.
[0008] Preferably, the welding system includes a transverse frame connected to the side of the pressure head fixing plate, a left pressure head and a right pressure head. The left pressure head and the right pressure head are slidably installed under the transverse frame by bolts. The left pressure head and the right pressure head can be spliced with each other to form a pressure head with a circular hole. The transverse frame is provided with a hole coaxial with the circular hole. The bolts are all sleeved with a second elastic member, one end of the two second elastic members both abuts against the transverse frame, and the other ends of the two second elastic members respectively abut against the left pressure head and the right pressure head.
[0009] Preferably, an air blowing pipe and an air suction pipe are respectively provided on both sides of the hole on the transverse frame.
[0010] Preferably, the left pressure head is provided with a nitrogen channel connected to the circular hole, and the nitrogen heating system comprises a nitrogen pipeline and a filter pump, the nitrogen pipeline is connected to the nitrogen channel, the filter pump is connected in series to the nitrogen pipeline, and the nitrogen pipeline is located between the filter pump and the left pressure head and is also connected to a heating device.
[0011] Preferably, the collimator system comprises a laser collimator box for placing lenses, and the objective lens end of the laser collimator box is provided with a lens dust-proof tube for blowing air, and the angle between the blowing direction of the lens dust-proof tube and the projection area on the objective lens is an acute angle.
[0012] Preferably, the laser collimator box is connected with an air inlet and an air outlet, and the air outlet is externally connected to a dust cover.
[0013] Compared with the prior art, the laser welding device capable of dust removal and temperature reduction proposed by the present invention adopts the above technical solution and achieves the following technical effects:
[0014] The present invention can heat the nitrogen required for laser welding in advance and inject it into the molten pool, preventing the molten pool from exploding, oxidation and cold welding, and reducing welding slag and smoke. The present application can clean foreign welding slag through the effects of blowing and sucking air, and can also clean and cool the lens, preventing the problem of cold welding at the weld point and cracking of the lens caused by energy loss or instability during laser welding. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0016] Figure 2 It is a schematic diagram of the structure of the driving system of the present invention;
[0017] Figure 3 It is a schematic diagram of the structure of the vertical cylinder system of the present invention;
[0018] Figure 4 A schematic diagram of a welding system of the present invention;
[0019] Figure 5It is a schematic diagram of the left and right pressure heads of the present invention;
[0020] Figure 6 It is a schematic diagram of the nitrogen heating system of the present invention;
[0021] Figure 7 Schematic diagram of the collimating mirror system of the present invention Figure 1 ;
[0022] Figure 8 Schematic diagram of the collimating mirror system of the present invention Figure 2 .
[0023] In the figure: 1. workbench; 2. drive system; 3. vertical cylinder system; 4. welding system; 5. nitrogen heating system; 6. collimator system; 21. bracket; 22. track; 23. slider; 24. screw; 25. power motor; 26. insulating plate; 31. cylinder; 32. pressure plate; 33. pressure head fixing plate; 35. guide rail; 34. bump; 36. guide column; 37. first elastic member; 41. horizontal frame; 42. left pressure head; 43. right pressure head; 45. bolt; 44. round hole; 411. hole; 46. second elastic member; 47. blowing pipe; 48. suction pipe; 421. nitrogen channel; 51. nitrogen pipeline; 52. filter pump; 53. heating device; 61. laser collimator box; 62. lens dustproof tube; 611. air inlet; 612. air outlet; 613. dust cover. DETAILED DESCRIPTION
[0024] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0025] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0026] Example
[0027] Please refer to Figure 1-Figure 8 The present invention proposes a laser welding device capable of dust removal and temperature reduction, comprising a workbench 1 and a driving system 2 installed on the workbench 1, the driving system 2 is connected to a vertical cylinder 31 system 3 on the side, and a welding system 4 is connected to the end of the vertical cylinder 31 system 3. The welding system 4 can move horizontally and longitudinally under the action of the driving system 2 and the vertical cylinder 31 system 3. The welding system 4 can correspond to the electrode of the battery after position movement. A fixing device capable of fixing the battery is provided on the upper surface of the workbench 1, and a collimating mirror system 6 is provided above the welding system 4, which is used to observe the welding degree of the welding system 4 on the battery electrode sheet. The welding system 4 is connected to a nitrogen heating system 5, and the nitrogen heating system 5 is used to provide heated nitrogen to the welding system 4, which can prevent the problem of cold welding or excessive slag spattering caused by cold nitrogen.
[0028] In a specific embodiment, refer to Figure 1 , Figure 2 , wherein the driving system 2 includes a bracket 21, a track 22 and a slider 23 installed on the workbench 1, the track 22 is installed on the side of the bracket 21, and the slider 23 can slide horizontally on the side of the bracket 21 through the track 22. The slider 23 and the guide rail 35 are moved away from each other through the screw rod 24. Therefore, the slider 23 is threadedly connected with a horizontally placed screw rod 24, and the rotation of the screw rod 24 can drive the slider 23 to move horizontally on the track 22 through the thread. A power motor 25 is connected to the end of the screw rod 24. The motor in this application is a servo motor, which can more accurately control the rotation position of the screw rod 24. The slider 23 is made of metal, and an insulating plate 26 for installation is installed on the side of the slider 23 away from the bracket 21, and a plurality of screw holes for installation are provided on the insulating plate 26.
[0029] In a specific embodiment, refer to Figure 1 , Figure 3, wherein the vertical cylinder 31 system 3 includes a longitudinally driven cylinder 31, a pressure plate 32, a pressure head fixing plate 33 and a guide rail 35. The cylinder 31 is fixedly connected to the side of the insulating plate 26 away from the bracket 21 by bolts 45. The shell of the cylinder 31 is connected to the insulating plate 26. The operation of the cylinder 31 will not affect the operation of the slider 23. In the above scheme, the horizontal movement of the slider 23 can drive the insulating plate 26 to move horizontally, so the cylinder 31 can move with the movement of the insulating plate 26. The pressure plate 32 is connected to the driving end of the cylinder 31. The pressure plate 32 is L-shaped. The operation of the cylinder 31 will drive the pressure plate 32 The pressure plate 32 is longitudinally moved, and a protrusion 34 is provided on the side away from the insulating plate 26. The protrusion 34 is connected to the pressure head fixing plate 33 through a guide column 36. The pressure head fixing plate 33 can approach or move away from the protrusion 34 along the guide column 36, resulting in a first elastic member 37 being sleeved. The two ends of the first elastic member 37 respectively abut against the pressure head fixing plate 33 and the protrusion 34. When the cylinder 31 moves downward, the pressure head fixing plate 33 abuts against an object, and the distance between the pressure head fixing plate 33 and the protrusion 34 will be reduced, and the first elastic member 37 will be in a compressed state, which can prevent the cylinder 31 from running excessively and causing the object to be crushed.
[0030] In a specific embodiment, refer to Figure 1 , Figure 4 , Figure 5 The welding system 4 includes a horizontal frame 41, a left pressure head 42 and a right pressure head 43 connected to the side of the pressure head fixing plate 33. The left pressure head 42 and the right pressure head 43 are slidably installed under the horizontal frame 41 through bolts 45. The left pressure head 42 and the right pressure head 43 can also be connected through a slideway to reduce the gap between the left pressure head 42 and the right pressure head 43 and increase the accuracy. When the left pressure head 42 and the right pressure head 43 are at the same level, the middle part of the contact surface of the left pressure head 42 and the right pressure head 43 can be spliced into a circular hole 44. The horizontal frame 41 is provided with a hole 411 coaxial with the circular hole 44, and the collimator system 6 can pass through the hole 411, the circular hole 44 The welding conditions at the bottom of the left pressure head 42 and the right pressure head 43 are observed; the bolts 45 of the left pressure head 42 and the right pressure head 43 are both sleeved with the second elastic member 46, one end of the two second elastic members 46 abuts against the horizontal frame 41, and the other ends of the two second elastic members 46 abut against the left pressure head 42 and the right pressure head 43 respectively, and the two second elastic members 46 are respectively in a compressed state for buffering, and the bolts 45 connecting the left pressure head 42 and the right pressure head 43 have different degrees of tightness, and the bolts 45 of the right pressure head 43 are more tightened, so that the lower end of the left pressure head 42 is lower than the lower end of the right pressure head 43, and when the entire welding system 4 descends, the left pressure head 42 can first contact the object.
[0031] In a specific embodiment, refer to Figure 7 , Figure 8On the horizontal frame 41, a blowing pipe 47 and an air suction pipe 48 are respectively provided on both sides of the hole 411. The blowing pipe 47 will blow air around the hole 411 to prevent dust and welding slag from splashing, and the dust will be absorbed by the air suction pipe 48 to keep it clean.
[0032] In a specific embodiment, refer to Figure 6 The left pressure head 42 is provided with a nitrogen channel 421 connected to the circular hole 44. The nitrogen heating system 5 includes a nitrogen pipeline 51 and a filter pump 52. The nitrogen pipeline 51 is connected to the nitrogen channel 421. The filter pump 52 is connected in series to the nitrogen pipeline 51. The nitrogen pipeline 51 is located between the filter pump 52 and the left pressure head 42 and is also connected to a heating device 53. The nitrogen is first filtered by the filter pump 52 in the nitrogen heating system 5, and then heated by the heating device 53. The heating of the nitrogen by the heating device 53 can be controlled by a heating controller. After being heated, the nitrogen will store a certain amount of energy. When burning and heating, the problem of cold welding caused by overcooling can be avoided.
[0033] In a specific embodiment, refer to Figure 7 , Figure 8 The collimator system 6 includes a laser collimator box 61 for placing lenses, and an air-blowing dust-proof tube 62 for blowing lenses is provided at the objective lens end of the laser collimator box 61. The angle between the blowing direction of the lens dust-proof tube 62 and the projection area on the objective lens is an acute angle. The laser collimator box 61 is connected with an air inlet 611 and an air outlet 612, and the air outlet 612 is connected to a dust cover 613. In the laser collimator box 61, the flow of gas in the laser collimator box 61 is maintained through the air inlet 611 and the air outlet 612, which can dissipate the heat inside the laser collimator box 61. The dust cover 613 is used at the air outlet 612 to prevent the entry of dust when it is not used, and the air inlet 611 is used to connect a blower mechanism for ventilation.
[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A laser welding device capable of dust removal and temperature reduction, characterized in that: The invention comprises a workbench (1) and a driving system (2) installed on the workbench (1); the driving system (2) is connected to a vertical cylinder system (3) on the side; the end of the vertical cylinder system (3) is connected to a welding system (4); the welding system (4) is connected to a nitrogen heating system (5); and a collimator system (6) is arranged above the welding system (4).
2. The laser welding device capable of dust removal and temperature reduction according to claim 1 is characterized in that: The driving system (2) comprises a bracket (21), a track (22) and a slider (23) mounted on a workbench (1); the track (22) is mounted on the side of the bracket (21); the slider (23) can slide on the side of the bracket (21) through the track (22); the track (22) has a screw rod (24) that can control the slider (23) to slide horizontally; the end of the track (22) is connected to a power motor (25) that controls the rotation of the screw rod (24); and the side of the slider (23) that is away from the bracket (21) is connected to an insulating plate (26).
3. The laser welding device capable of dust removal and temperature reduction according to claim 2 is characterized in that: The vertical cylinder system (3) comprises a longitudinally driven cylinder (31), a pressure plate (32), a pressure head fixing plate (33) and a guide rail (35); the cylinder (31) is connected to a side of the insulating plate (26) away from the bracket (21); the pressure plate (32) is connected to the driving end of the cylinder (31); the guide rail (35) is arranged on the side of the pressure plate (32); the pressure head fixing plate (33) slides longitudinally on the pressure plate (32) relatively via the guide rail (35); the pressure plate (32) has a protrusion (34) on one side of the guide rail (35); a guide column (36) penetrating the protrusion (34) is connected above the pressure head fixing plate (33); a first elastic member (37) is sleeved on the guide column (36); and two ends of the first elastic member (37) respectively contact the pressure head fixing plate (33) and the protrusion (34).
4. The laser welding device capable of dust removal and temperature reduction according to claim 3 is characterized in that: The welding system (4) comprises a transverse frame (41) connected to the side of the pressure head fixing plate (33), a left pressure head (42) and a right pressure head (43); the left pressure head (42) and the right pressure head (43) are slidably installed under the transverse frame (41) by bolts (45); the left pressure head (42) and the right pressure head (43) can be spliced together to form a pressure head with a circular hole (44); the transverse frame (41) is provided with a hole (411) coaxial with the circular hole (44); the bolts (45) are each sleeved with a second elastic member (46); one end of the two second elastic members (46) are both against the transverse frame (41); the other ends of the two second elastic members (46) are respectively against the left pressure head (42) and the right pressure head (43).
5. The laser welding device capable of dust removal and temperature reduction according to claim 4 is characterized in that: An air blowing pipe (47) and an air suction pipe (48) are respectively arranged on both sides of the hole (411) on the transverse frame (41).
6. The laser welding device capable of dust removal and temperature reduction according to claim 4 is characterized in that: The left pressure head (42) is provided with a nitrogen channel (421) connected to the circular hole (44); the nitrogen heating system (5) comprises a nitrogen pipeline (51) and a filter pump (52); the nitrogen pipeline (51) is connected to the nitrogen channel (421); the filter pump (52) is connected in series to the nitrogen pipeline (51); the nitrogen pipeline (51) is located between the filter pump (52) and the left pressure head (42) and is also connected to a heating device (53).
7. The laser welding device capable of dust removal and temperature reduction according to claim 1 is characterized in that: The collimator system (6) comprises a laser collimator box (61) for placing a lens, and an air-blowing lens dust-proof tube (62) is provided at the objective lens end of the laser collimator box (61), wherein the angle between the air-blowing direction of the lens dust-proof tube (62) and the projection area on the objective lens is an acute angle.
8. The laser welding device capable of dust removal and temperature reduction according to claim 7 is characterized in that: The laser collimator box (61) is connected to an air inlet (611) and an air outlet (612), and the air outlet (612) is externally connected to a dust cover (613).