Laser welding pressure head, laser welding tool and cleaning device

Abstract

The utility model discloses a laser welding pressure head, a laser welding tool and a cleaning device. The laser welding pressure head comprises a pressure head plate and a pressure head unit, the pressure head plate is provided with at least one welding hole penetrating through the thickness of the pressure head plate, the pressure head unit is provided with a through pressure head cavity, the pressure head unit is detachably connected with the pressure head plate, and the pressure head cavity is communicated with the welding hole. The laser welding pressure head is of a split structure and is suitable for welding batteries of different sizes, and the pressure head unit is convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding pressure heads, in particular to a laser welding pressure head, a laser welding tool and a cleaning device. Background Art

[0002] During the production of battery modules, the battery modules need to be laser welded with the busbars to complete the series and / or parallel connection of the battery cells. However, during laser welding, the spattered welding slag will accumulate on the inner wall of the laser welding head. If it is not cleaned, it will affect the transmission rate of the laser. If the laser welding head is not cleaned properly or does not meet the standard requirements, it may affect the transmission of the laser and cause poor welding.

[0003] The existing laser welding head cleaning solution is mainly to clean from the bottom to the top by fixing a cylindrical brush. This cleaning solution can often only clean part of the welding slag attached to the inner wall of the head, but cannot completely clean the welding slag attached to the inner wall of the head. Therefore, it is necessary to develop a new type of laser welding head and its cleaning mechanism. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and defects of the prior art and to provide a laser welding head, a laser welding tool and a cleaning device. The laser welding head is a split structure and is suitable for laser welding of batteries of different sizes.

[0005] One of the purposes of the utility model is to provide a laser welding pressure head, including a pressure head plate and a pressure head unit, wherein the pressure head plate is provided with at least one welding hole penetrating the thickness of the pressure head plate, the pressure head unit is provided with a through pressure head cavity, the pressure head unit is detachably connected to the pressure head plate, and the pressure head cavity is connected to the welding hole.

[0006] Wherein, the pressure head unit is embedded in the bottom surface of the pressure head plate.

[0007] Wherein, the side wall of the pressure head unit is provided with an inner wall dust removal port and a protective gas interface, and the inner wall dust removal port and the protective gas interface are both connected to the pressure head cavity.

[0008] The second purpose of the utility model is to provide a laser welding tool, comprising two laser welding rams, wherein the welding holes and ram units of the two laser welding rams are symmetrically arranged.

[0009] The third purpose of the present utility model is to provide a cleaning device suitable for the laser welding head as described above, wherein the cleaning device is arranged on a cleaning station cooperating with the laser welding head, and comprises a vertically arranged cleaning brush which is driven to rotate and to be raised and lowered, wherein the cleaning brush is used to extend into the welding hole of the laser welding head when the laser welding head is driven to a predetermined position of the cleaning station, and the inner wall surface of the welding hole is cleaned by the cleaning brush contacting and rotating with the inner wall of the welding hole.

[0010] Among them, the cleaning brush is a conical brush head, the conical brush head is connected to the driving shaft through a coupling, and the driving shaft is connected to the driving motor through a linear bearing; the driving motor is arranged on a horizontally placed lifting plate, and the lifting plate is connected to the linear driving cylinder.

[0011] There are two cleaning brushes, which are symmetrically arranged on the lifting plate.

[0012] Wherein, a camera for collecting an image of the inner wall surface of the welding hole after cleaning is arranged correspondingly on the lower surface of the lifting plate.

[0013] A dust collecting mechanism is arranged at the bottom of the linear drive cylinder, and the dust collecting mechanism includes a dust collecting port that cooperates with the bottom through hole of the laser welding head. The bottom of the dust collecting port is connected to one end of a dust collecting pipe, and the other end of the dust collecting pipe is connected to a negative pressure generator.

[0014] There are two dust collection ports, which are symmetrically arranged on both sides of a mounting plate, and the linear drive cylinder is connected to the mounting plate.

[0015] The laser welding pressure head of the utility model is a split structure, which is suitable for welding batteries of different sizes and is convenient for replacing the pressure head unit.

[0016] The laser welding tool provided by the utility model has laser welding pressure heads which are arranged symmetrically on the left and right to perform welding operations, thereby realizing single-sided and double-sided welding at the same time.

[0017] The laser welding head cleaning device of the utility model can ensure that the welding slag and dust on the inner wall of the welding hole of the laser welding head are cleaned by controlling the cleaning brush to rotate and move from top to bottom, effectively solving the problem of manual cleaning in the prior art, which is time-consuming, labor-intensive and unable to be cleaned thoroughly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cooperation between the laser welding head cleaning device provided by the embodiment of the utility model and the laser welding head driven by the three-axis module mechanism;

[0019] Figure 2It is a schematic diagram of the cooperation between the laser welding head cleaning device and the laser welding head provided in the embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the coordination between the laser welding head provided by the embodiment of the utility model and the dust collecting port of the dust collecting mechanism of the laser welding head cleaning device;

[0021] Figure 4 It is a schematic diagram of a laser welding head cleaning device provided by an embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of a laser welding head provided in an embodiment of the utility model;

[0023] Figure 6 It is a schematic diagram of a pressure head unit on a laser welding pressure head provided in an embodiment of the utility model;

[0024] Figure 7 It is a schematic diagram of a dust collecting mechanism of a laser welding head cleaning device provided in an embodiment of the utility model;

[0025] Reference numerals:

[0026] 1. Laser welding head cleaning device; 2. Three-axis module mechanism; 3. Laser welding head;

[0027] 11. Cleaning mechanism; 12. Dust collection mechanism; 13. 2D camera;

[0028] 111. driving motor; 112. linear bearing; 113. driving shaft; 114. coupling; 115. three-axis cylinder; 116. conical brush head; 117. lifting plate;

[0029] 121. mounting plate; 122. dust collecting port; 123. dust collecting pipe; 124. connecting plate;

[0030] 31. Pressure head plate; 32. Pressure head unit; 33. Welding hole;

[0031] 321. Pressure head cavity; 322. Through hole at the bottom of the pressure head; 323. Inner wall dust removal port; 324. Protective gas interface; 325. Spring. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] like Figures 1 to 6As shown, one of the purposes of the embodiment of the utility model is to provide a laser welding head 3, including a head plate 31 and a head unit 32, the head plate 31 is provided with at least one welding hole 33 penetrating the thickness of the head plate, the head unit 32 is provided with a through head cavity 321, the head unit 32 is detachably connected to the head plate 31, and the head cavity 321 is connected to the welding hole 33.

[0034] The laser welding pressure head of the utility model is a split structure, which is arranged symmetrically on the left and right for welding operations, so that it can not only perform single-side cleaning but also perform double-side cleaning simultaneously. It is suitable for welding batteries of different sizes and is convenient for replacing the pressure head unit.

[0035] In some embodiments, a plurality of welding holes 33 for laser penetration are provided on the substrate of each laser welding press head 3, and the plurality of welding holes 33 are arranged linearly.

[0036] Preferably, the pressure head unit 32 is embedded in the bottom surface of the pressure head plate 31. Specifically, a plurality of pressure head units 32 corresponding to the welding holes 33 are arranged below the pressure head plate 31 of the laser welding pressure head 33 and connected by a spring 325 embedded in the mounting hole on the bottom surface of the pressure head plate 31. Each of the pressure head units 32 has a pressure head cavity 321 that is larger at the top and smaller at the bottom (may be conical) and is connected from top to bottom. A pressure head bottom through hole 322 is provided at the bottom, through which the laser is emitted for welding.

[0037] In some embodiments, the side wall of the pressure head unit is provided with an inner wall dust removal port 323 and a protective gas interface 324, and the inner wall dust removal port 232 and the protective gas interface 324 are both connected to the pressure head cavity 321. The inner wall dust removal port 323 is connected to the internal pressure head cavity 32, and is used to absorb the smoke generated by welding by negative pressure during welding. A protective gas interface 324 is provided to communicate with the internal pressure head cavity 32, and is used to introduce protective gas during welding.

[0038] The second purpose of the embodiment of the utility model is to provide a laser welding tool, including two laser welding heads, the welding holes 33 and the head units 32 of the two laser welding heads are symmetrically arranged. The laser welding tool provided by the embodiment of the utility model, the laser welding heads are arranged symmetrically on the left and right to perform welding operations, and single and double-sided welding can be achieved simultaneously.

[0039] like Figure 1 and Figure 2As shown, the third purpose of the embodiment of the utility model is to provide a cleaning device 11 for a laser welding head, which is arranged on a cleaning station cooperating with the laser welding head, and includes a vertically arranged cleaning brush that can be driven to rotate and lift. The cleaning brush is used to extend into the welding hole 33 of the laser welding head when the laser welding head 3 is driven to a predetermined position of the cleaning station, and the cleaning brush contacts and rotates with the inner wall of the welding hole 33 to clean the inner wall surface of the welding hole.

[0040] The present application uses a rotatable, liftable and vertically arranged cleaning brush to achieve rotation and lifting movement in the Z-axis direction to clean the welding hole 33 on the laser welding head 3, thereby improving the cleaning efficiency and cleaning area of ​​the welding hole 33 and reducing the defective rate of cleaning the laser welding head.

[0041] In the present application, the laser welding tooling includes two laser welding heads 3, which are split structures and are arranged symmetrically on the left and right to perform welding operations, so that they can not only perform single-sided cleaning but also perform double-sided cleaning simultaneously.

[0042] When in use, the laser welding head 12 is arranged at the welding position of the battery module. The robot drives the laser generator to emit laser, and welds the bus and the battery pole through the welding hole 331 on the laser welding head 3. During welding, the bottom 2 of the head unit 32 is pressed on the bus and the battery pole. Each of the laser welding heads 3 is driven by a set of three-axis module mechanisms 2 and can move in three-axis directions and move between the welding station and the cleaning station. When the laser welding head 3 is located at the cleaning station, the cleaning brush is driven to clean the welding hole 33. When located at the welding station, the robot drives the laser generator to emit laser, and welds the bus and the battery pole through the welding hole 33 on the laser welding head 3.

[0043] In some embodiments, the pressure head cavity 321 is conical, and the cleaning brush includes a conical brush head 116 matched therewith, and the conical brush head is connected to the drive shaft 113, and the drive shaft is connected to the drive motor 111. The conical brush head connected to the drive shaft can be disassembled and replaced, and the type of laser welding pressure head corresponding to the type of battery cell can be quickly changed, reducing the difficulty and time of changing.

[0044] Preferably, the conical brush head is connected to the drive shaft via a coupling 114, and the drive shaft is connected to the drive motor via a linear bearing 112. The conical brush head is connected via a coupling for easy replacement, that is, the conical brush head 116 can be quickly replaced to reduce wasted time.

[0045] In some embodiments, the drive motor 111 is arranged on a horizontally placed lifting plate 117, and the lifting plate is connected to a linear drive cylinder. Preferably, the linear drive cylinder adopts a three-axis cylinder 115, and can also be implemented by cylinders of other structures or forms, or other linear drive mechanisms.

[0046] In some embodiments, there are two cleaning brushes, which are symmetrically arranged on the lifting plate. Arranging two cleaning brushes can realize cleaning of the two laser welding heads 3 on both sides, so as to meet the cleaning needs of the two split-arranged laser welding heads 3 of the welding equipment.

[0047] In some embodiments, the linear drive cylinder and the cleaning brush are arranged on the same side of the lifting plate 117, so that the linear drive cylinder can be arranged at the bottom to occupy less upper space. Of course, if permitted, it can also be arranged at the top.

[0048] In some embodiments, a camera is also arranged for collecting images of the inner surface of the welding hole after cleaning by a cleaning brush. Preferably, a 2D camera 13 is used and is located on the lower surface of the lifting plate. After cleaning is completed, pictures of the inside of the welding hole 33 can be collected to facilitate observation of the cleaning effect. For example, after cleaning is completed, the cleaning effect can be detected by pictures collected manually visually.

[0049] In some embodiments, a dust collecting mechanism 12 is arranged at the bottom of the linear drive cylinder, and the dust collecting mechanism 12 includes a dust collecting port 122 that cooperates with the bottom through hole of the laser welding pressure head. The dust collecting mechanism can collect welding slag dropped when the cleaning brush cleans the inner wall surface of the welding hole 33 by negative pressure exhaust. One end of the dust collecting pipe is connected to the bottom of the dust collecting port, and one end of the dust collecting pipe is connected to a negative pressure generator. As a preferred embodiment of the utility model, the axial direction of the conical brush head 116 is on the same straight line as the center of the dust collecting port 122.

[0050] In some embodiments, there are two dust collection ports 122, which are symmetrically arranged on both sides of a mounting plate 121 through a connecting plate 124, and the linear drive cylinder is connected to the mounting plate.

[0051] During cleaning, the cleaning mechanism 11 can be driven by the three-axis module mechanism 2 to the cleaning station, and the driving motor 111 drives the driving shaft 113 and the conical brush head 116 to rotate, and then the three-axis cylinder 115 drives the conical brush head 116 to move downward into the welding hole 121 to clean the inner wall of the pressure head. The three-axis module mechanism 2 drives the laser welding pressure head 3 to make a back and forth up and down movement or multiple times to achieve cleaning.

[0052] Among them, the dust collecting mechanism 12 collects the welding slag dropped in the welding hole 33 on the dust collecting side; after one cleaning is completed, the three-axis module mechanism 2 drives the laser welding head 3 to move to the next welding hole 33, and continues to clean the remaining welding holes 33 on the laser welding head 3. After repeated overall cleaning, the 2D camera 13 takes pictures of the welding holes 33 on the laser welding head 3 and displays the cleaned pictures on the display screen to observe the cleaning effect.

[0053] The laser welding head cleaning device of the utility model can adapt to the welding of different types of battery cells by moving the three-axis module mechanism and replacing the conical brush heads of different specifications, reducing the time consumed by the replacement and the difficulty of operation. The laser welding head cleaning device of the utility model can not only be used for laser welding in battery pack manufacturing, but also can be widely used in high-end manufacturing fields such as aviation, automobiles, electronics, and medical equipment.

[0054] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model.

[0055] Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0056] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A laser welding head, characterized in that: It includes a pressure head plate and a pressure head unit. The pressure head plate is provided with at least one welding hole that penetrates the thickness of the pressure head plate. The pressure head unit is provided with a through pressure head cavity. The pressure head unit is detachably connected to the pressure head plate, and the pressure head cavity is connected to the welding hole.

2. The laser welding head according to claim 1, characterized in that: The pressure head unit is embedded in the bottom surface of the pressure head plate.

3. The laser welding head according to claim 1, characterized in that: The side wall of the pressure head unit is provided with an inner wall dust removal port and a protective gas interface, and the inner wall dust removal port and the protective gas interface are both communicated with the pressure head cavity.

4. A laser welding tool, characterized in that: It comprises two laser welding rams according to any one of claims 1 to 3, wherein the welding holes and ram units of the two laser welding rams are symmetrically arranged.

5. A cleaning device for a laser welding head according to any one of claims 1 to 3, characterized in that: The cleaning device is arranged on a cleaning station that cooperates with the laser welding head, and includes a vertically arranged cleaning brush that is driven to rotate and rise and fall. The cleaning brush is used to extend into the welding hole of the laser welding head when the laser welding head is driven to a predetermined position of the cleaning station. The cleaning brush contacts and rotates with the inner wall of the welding hole to clean the inner wall surface of the welding hole.

6. The cleaning device for the laser welding head according to claim 5, characterized in that: The cleaning brush is a conical brush head, which is connected to a driving shaft via a coupling, and the driving shaft is connected to a driving motor via a linear bearing; the driving motor is arranged on a horizontally placed lifting plate, and the lifting plate is connected to a linear driving cylinder.

7. The cleaning device for the laser welding head according to claim 6, characterized in that: There are two cleaning brushes, which are symmetrically arranged on the lifting plate.

8. The cleaning device for the laser welding head according to claim 6, characterized in that: A camera for collecting an image of the inner wall surface of the welding hole after cleaning is arranged correspondingly on the lower surface of the lifting plate.

9. The cleaning device for the laser welding head according to claim 6, characterized in that: A dust collecting mechanism is arranged at the bottom of the linear drive cylinder, and the dust collecting mechanism includes a dust collecting port that cooperates with the bottom through hole of the laser welding pressure head. The bottom of the dust collecting port is connected to one end of a dust collecting pipe, and the other end of the dust collecting pipe is connected to a negative pressure generator.

10. The cleaning device for the laser welding head according to claim 9, characterized in that: There are two dust collecting ports, which are symmetrically arranged on two sides of a mounting plate, and the linear drive cylinder is connected to the mounting plate.

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