Battery pack laser welding machine

Abstract

The utility model discloses a laser welding machine for a battery pack, and relates to the technical field of lithium battery processing equipment. The supporting platform is used for supporting a shell loaded with a battery pack; the laser welding part is used for carrying out laser welding on the battery pack in the shell; the driving assembly is arranged on one side of the supporting platform and used for driving the laser welding part to move in the arrangement direction of the battery packs so that the laser welding part can conduct continuous laser welding on the battery packs in the shell; and the pressing assembly is connected to one side of the output end of the laser welding part, and when the laser welding part conducts continuous laser welding on all the battery packs in the shell, the pressing state of the current to-be-welded battery pack is always kept. The utility model aims to realize continuous pressing and welding between the electrode plate and the row of battery cells.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery processing equipment, in particular to a battery pack laser welding machine. Background Art

[0002] With the rapid development of new energy vehicles in my country, battery packs, as core components of new energy vehicles, have become the focus of research in the new energy vehicle and battery industries. In the production process of battery packs, multiple individual cells need to be arranged in the designed structural order and then loaded into the battery pack shell, and then the electrode plates are welded to the tabs of the cells using welding equipment, so that the arranged cells are combined into a battery pack in series and parallel.

[0003] During the welding process of the battery pack, the welding effect between the electrode plate and the battery cell seriously affects the service life and safety of the entire battery pack. Once a problem occurs at the welding point, the battery pack may fail to be used, or even cause a fire due to a short circuit in the battery pack. In order to ensure the welding effect between the electrode plate and the battery cell, a clamping mechanism is often required to press the two tightly before welding, and then perform the welding process.

[0004] In order to solve the above technical problems, Chinese patent CN2017202453857 disclosed a welding device suitable for power battery packs on November 14, 2017, including a welding robot and a welding fixture connected to the welding robot, the welding fixture including a main frame, a movably arranged laser welding head, a clamping mechanism arranged on the main frame and used to clamp the welding workpiece, and a driving mechanism arranged on the main frame and connected to the laser welding head, the driving mechanism including a motor, a lead screw nut transmission mechanism and a sliding block connected in sequence. Although it realizes the clamping of the workpiece during welding, it ensures the welding quality of the battery pack.

[0005] However, the welding device cannot achieve continuous welding between the electrode plate and the rows of battery cells. After the welding device finishes welding one battery cell, it needs to lift it up as a whole, then move it a certain distance along the battery cell arrangement direction and then press it down again. It is then pressed by the clamping mechanism before welding another battery cell to the electrode plate. This restricts the welding efficiency of the battery pack.

[0006] Therefore, how to achieve continuous compression and welding between electrode plates and rows of battery cells has become a technical problem that needs to be solved urgently. Utility Model Content

[0007] The main purpose of the utility model is to provide a battery pack laser welding machine, aiming to achieve continuous compression welding between electrode plates and rows of battery cells.

[0008] In order to achieve the above purpose, the utility model proposes a battery pack laser welding machine, comprising:

[0009] A supporting platform, used to support a housing loaded with a battery pack;

[0010] A laser welding part, used for laser welding the battery pack in the shell;

[0011] A driving assembly, disposed on one side of the supporting platform, for driving the laser welding component to move along the arrangement direction of the battery packs, so that the laser welding component can continuously laser weld each battery pack in the housing;

[0012] The clamping assembly is connected to one side of the output end of the laser welding component. When the laser welding component continuously laser welds the battery packs in the shell, the clamping state of the battery pack to be welded is always maintained.

[0013] In one embodiment of the present application, the pressing assembly includes:

[0014] A strip plate connected to the output end of the laser welding;

[0015] A U-shaped pressure wheel bar frame, wherein the bent portion of the U-shaped pressure wheel bar frame is connected to the strip plate; and

[0016] The pressing wheel is rotatably connected to the two free ends of the U-shaped pressing wheel bar frame and can be rolled and pressed on each battery pack.

[0017] In one embodiment of the present application, the pressing assembly further includes:

[0018] A telescopic member, wherein the fixed end of the telescopic member is connected to the strip plate, the telescopic shaft of the telescopic member is rotatably connected to the U-shaped pressure wheel frame, and the U-shaped pressure wheel frame is rotatably connected to the strip plate.

[0019] In one embodiment of the present application, the output end of the laser welding part is also rotatably connected to a carrier plate, the carrier plate is located above the strip plate, and the carrier plate is connected to the driving assembly and can move with the driving assembly;

[0020] The carrier plate is provided with a first driving member for driving the laser welding member to rotate relative to the carrier plate, thereby driving the clamping assembly to change direction.

[0021] In one embodiment of the present application, the driving assembly includes:

[0022] The transverse movement module is arranged on one side of the supporting platform, and the transverse movement module is used to drive the laser welding part to reciprocate along the X direction.

[0023] In one embodiment of the present application, the driving assembly further includes:

[0024] The longitudinal movement module is arranged between the laser welding component and the transverse movement module. The longitudinal movement module is connected to the transverse movement module, and the transverse movement module is used to drive the longitudinal movement module to reciprocate along the X direction; the laser welding component is connected to the longitudinal movement module, and the longitudinal movement module is used to drive the laser welding component to reciprocate along the Z direction.

[0025] In one embodiment of the present application, the driving assembly further includes:

[0026] The horizontal module is arranged between the laser welding component and the longitudinal movement module. The horizontal module is connected to the longitudinal movement module, and the longitudinal movement module is used to drive the horizontal module to reciprocate along the Z direction; the laser welding component is connected to the horizontal module, and the horizontal module is used to drive the laser welding component to reciprocate along the Y direction.

[0027] In one embodiment of the present application, a clamping cylinder for clamping the shell loaded with the battery pack is provided on the support platform.

[0028] In one embodiment of the present application, there are four clamping cylinders, wherein two first clamping cylinders clamp the first end of the shell, and two second clamping cylinders clamp the second end of the shell, and the first end and the second end of the shell are arranged opposite to each other.

[0029] In one embodiment of the present application, the telescopic member is a hydraulic telescopic rod.

[0030] With the above technical solution, laser welding technology has a high positioning accuracy and welding quality, and can achieve precise welding of battery pack components, ensuring the reliability and stability of welding points. The battery pack laser welding machine can continuously laser weld each battery pack in the shell by continuously moving the driving assembly, improving production efficiency and welding speed. The presence of the clamping assembly ensures that the current battery pack to be welded is always clamped during the welding process, preventing errors or looseness during the welding process, and ensuring welding quality and consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention is described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0032] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0033] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the middle compression assembly;

[0034] 10. Support platform; 20. Shell; 31. First clamping cylinder; 32. Second clamping cylinder; 40. Transverse movement module; 50. Longitudinal movement module; 60. Horizontal module; 70. Clamping assembly; 71. Strip plate; 72. U-shaped pressure wheel frame; 73. Pressure wheel; 74. Telescopic part; 80. Laser welding part; 90. First driving part; 100. Carrier plate. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the utility model and do not constitute a limitation on the utility model.

[0036] like Figure 1 to Figure 2 As shown, in order to achieve the above purpose, the utility model proposes a battery pack laser welding machine, comprising:

[0037] A supporting platform 10, used to support a housing 20 loaded with a battery pack;

[0038] A laser welding part 80, used for laser welding the battery pack in the housing 20;

[0039] A driving assembly, disposed on one side of the supporting platform 10, for driving the laser welding member 80 to move along the arrangement direction of the battery packs, so that the laser welding member 80 can continuously laser weld the battery packs in the housing 20;

[0040] The clamping assembly 70 is connected to one side of the output end of the laser welding component 80. When the laser welding component 80 continuously laser welds the battery packs in the shell 20, the clamping state of the battery pack to be welded is always maintained.

[0041] Specifically, the support platform 10 is used to carry and support the housing 20 loaded with the battery pack. The support platform 10 is made of metal materials, such as aluminum alloy materials, alloy steel materials, etc. The support platform 10 made of metal materials has the advantages of strong support capacity and wear resistance, so as to ensure stable support during the laser welding process.

[0042] The laser welding part 80 is a device for laser welding the battery pack in the housing 20. The laser welding part 80 is composed of a laser generator, a beam transmission system and a welding head. The laser welding part 80 uses a high-energy laser beam to accurately weld the components of the battery pack to ensure the reliability of the welding.

[0043] The driving assembly is connected to one side of the supporting platform 10, and is used to drive the laser welding member 80 to move along the arrangement direction of the battery pack. The driving assembly can be an electric driving system, such as a motor and a transmission device, or a hydraulic / pneumatic system, to achieve continuous movement of the laser welding member 80, so as to continuously laser weld each battery pack in the housing 20.

[0044] The clamping assembly 70 is connected to one side of the output end of the laser welding part 80. When the laser welding part 80 performs continuous laser welding on each battery pack in the shell 20, the clamping assembly 70 always maintains the clamping state of the current battery pack to be welded. The clamping assembly 70 can be a telescopic clamping device or a rolling clamping device. The telescopic clamping device realizes continuous extension and retraction through a telescopic rod commonly used in the prior art, thereby completing the clamping of the battery pack to be welded. It can also be a rolling clamping device, which is clamped by a rolling clamping device and realizes continuous clamping by rolling, thereby ensuring the stable position of the battery pack during welding and providing sufficient contact pressure to ensure the welding quality.

[0045] By adopting the above technical solution, the laser welding technology has a high positioning accuracy and welding quality, and can realize the precise welding of the battery pack assembly, ensuring the reliability and stability of the welding point. The battery pack laser welding machine can continuously laser weld each battery pack in the shell 20 by continuously moving the driving assembly, thereby improving production efficiency and welding speed. The presence of the clamping assembly 70 ensures that the current battery pack to be welded is always clamped during the welding process, preventing errors or looseness during the welding process, and ensuring welding quality and consistency.

[0046] In one embodiment of the present application, the pressing assembly 70 includes:

[0047] A strip plate 71 connected to the output end of the laser welding;

[0048] A U-shaped pressing wheel 73 and a frame 72, wherein the bent portion of the U-shaped pressing wheel 73 and the frame 72 is connected to the strip plate 71; and

[0049] The pressing wheel 73 is rotatably connected to the two free ends of the U-shaped pressing wheel 73 frame 72 and can be rolled and pressed on each battery pack.

[0050] Specifically, the strip plate 71 is connected to the output end of the laser welding member 80, and the strip plate 71 is tightly connected to the output end of the laser welding member 80, and there is no relative displacement between the strip plate 71 and the laser welding member 80. The strip plate 71 provides a supporting plane so that the pressure wheel 73 can stably move and apply pressure on the battery pack.

[0051] The U-shaped pressing wheel 73 frame 72 is a component with a U-shaped bending structure, and its bending portion is connected to the strip plate 71. The function of the U-shaped pressing wheel 73 frame 72 is to provide a fixed position so that the pressing wheel 73 can extend below the laser welding part 80 and maintain contact with the battery pack.

[0052] The pressing wheel 73 is connected to the two free ends of the U-shaped pressing wheel 73 frame 72. The function of the pressing wheel 73 is to apply appropriate pressure on the battery pack by rotating and rolling to ensure that the battery pack maintains a stable compression state during the laser welding process.

[0053] With the above technical solution, by using the U-shaped pressure wheel 73 frame 72 and the pressure wheel 73, the clamping assembly 70 can provide stable and controllable pressure on the battery pack. This helps to ensure that the position of the battery pack is stable during welding, avoid loosening or offset, thereby improving the quality and consistency of welding. Since the pressure wheel 73 can move along a predetermined track, continuous movement and clamping can be achieved, thereby improving the welding efficiency of the laser welded part 80.

[0054] In one embodiment of the present application, the pressing assembly 70 further includes:

[0055] A telescopic member 74 , the fixed end of which is connected to the strip plate 71 , the telescopic shaft of which is rotatably connected to the U-shaped pressure wheel 73 and the frame 72 , and the U-shaped pressure wheel 73 and the frame 72 are rotatably connected to the strip plate 71 .

[0056] Specifically, the clamping assembly 70 further includes a telescopic member 74. The telescopic member 74 is a telescopic member, whose fixed end is connected to the strip plate 71, and the telescopic shaft is rotatably connected to the U-shaped pressure wheel 73 frame 72. The telescopic member 74 is composed of a hydraulic device, and the pressure applied by the pressure wheel 73 on the battery pack is controlled by adjusting the length of the telescopic shaft.

[0057] With the above technical solution, the clamping assembly 70 can adjust the pressure applied by the pressing wheel 73 on the battery pack through the existence of the telescopic member 74. By adjusting the length of the telescopic shaft, the pressure applied during the welding process can be precisely controlled to adapt to different types of battery packs and welding requirements.

[0058] In one embodiment of the present application, the output end of the laser welding member 80 is also rotatably connected to a carrier plate 100, the carrier plate 100 is located above the strip plate 71, and the carrier plate 100 is connected to the driving assembly and can move with the driving assembly;

[0059] The carrier plate 100 is provided with a first driving member 90 for driving the laser welding member 80 to rotate relative to the carrier plate 100 , thereby driving the pressing assembly 70 to change direction.

[0060] Specifically, the carrier plate 100 is located above the strip plate 71. It is a flat plate connected to the driving assembly and can move with the movement of the driving assembly. The function of the carrier plate 100 is to provide a supporting plane to install and fix the laser welding part 80 and the pressing assembly 70 and ensure that their relative positions remain stable.

[0061] The first driving member 90 is located on the carrier 100 and is used to drive the laser welding member 80 to rotate relative to the carrier 100. It can be a motor, a pneumatic device or other driving device, which drives the laser welding member 80 and the clamping assembly 70 to change their direction and position by controlling the rotational motion.

[0062] By adopting the above technical solution, the whole device has multi-dimensional adjustment capability through the carrier plate 100 and the first driving member 90. The laser welding member 80 can rotate relative to the carrier plate 100, thereby changing the clamping direction and angle of the clamping assembly 70 to achieve a more flexible and accurate welding operation. Due to the driving action of the first driving member 90, the direction of the laser welding member 80 and the clamping assembly 70 can be quickly changed. This ability to quickly change direction can improve production efficiency, reduce operation time, and adapt to diverse welding needs.

[0063] In one embodiment of the present application, the driving assembly includes:

[0064] The transverse movement module 40 is disposed on one side of the support platform 10 , and the transverse movement module 40 is used to drive the laser welding component 80 to reciprocate along the X direction.

[0065] Specifically, the lateral movement module 40 is located on one side of the support platform 10, and is used to drive the laser welding part 80 to reciprocate along the X direction. It is usually composed of a motor, a transmission device, and a guide rail, etc., and realizes the translational movement of the laser welding part 80 in the X direction by controlling the rotation of the motor and the movement of the transmission device. Since it is a prior art, it will not be described in detail here.

[0066] By adopting the above technical solution, the traverse module 40 can realize automatic reciprocating motion of the laser welding part 80 in the X direction through the control of the motor and the transmission device. Such automatic control can improve production efficiency, reduce the need for manual operation, and ensure the accuracy and consistency of the welding process.

[0067] In one embodiment of the present application, the driving assembly further includes:

[0068] The longitudinal movement module 50 is arranged between the laser welding component 80 and the transverse movement module 40. The longitudinal movement module 50 is connected to the transverse movement module 40, and the transverse movement module 40 is used to drive the longitudinal movement module 50 to reciprocate along the X direction; the laser welding component 80 is connected to the longitudinal movement module 50, and the longitudinal movement module 50 is used to drive the laser welding component 80 to reciprocate along the Z direction.

[0069] Specifically, the longitudinal movement module 50 is connected between the laser welding part 80 and the transverse movement module 40, and is used to drive the laser welding part 80 to reciprocate along the Z direction. It is usually composed of a motor, a transmission device, and a guide rail, etc., and the translational movement of the laser welding part 80 in the Z direction is achieved by controlling the rotation of the motor and the movement of the transmission device. The transverse movement module 40 drives the longitudinal movement module 50 to reciprocate along the X direction, thereby achieving the movement of the laser welding in the X and Z directions.

[0070] By adopting the above technical solution, through the combination of the longitudinal movement module 50 and the transverse movement module 40, the whole system has multi-axis motion capability. The laser welding part 80 can reciprocate in the X direction and the Z direction to achieve precise welding operation in a two-dimensional plane. This multi-axis motion capability can meet the welding requirements of complex workpieces and improve the flexibility and accuracy of welding.

[0071] In one embodiment of the present application, the driving assembly further includes:

[0072] The horizontal module 60 is arranged between the laser welding component 80 and the longitudinal movement module 50. The horizontal module 60 is connected to the longitudinal movement module 50, and the longitudinal movement module 50 is used to drive the horizontal module 60 to reciprocate along the Z direction; the laser welding component 80 is connected to the horizontal module 60, and the horizontal module 60 is used to drive the laser welding component 80 to reciprocate along the Y direction.

[0073] Specifically, the horizontal module 60 is located between the laser welding part 80 and the longitudinal movement module 50, and is used to drive the laser welding part 80 to reciprocate along the Y direction. The horizontal module 60 is generally composed of a motor, a transmission device, and a guide rail. By controlling the rotation of the motor and the movement of the transmission device, the horizontal module 60 can realize the translation movement of the laser welding part 80 in the Y direction.

[0074] By adopting the above technical solution, the whole system has multi-axis motion capability through the combination of the horizontal module 60, the longitudinal module 50, and the transverse module 40. The laser welding part 80 can reciprocate in the X, Z and Y directions to achieve precise welding operations in three-dimensional space. This multi-axis motion capability can meet the welding requirements of complex workpieces and improve the flexibility and accuracy of welding.

[0075] In one embodiment of the present application, a clamping cylinder for clamping the housing 20 loaded with the battery pack is provided on the support platform 10 .

[0076] With the above technical solution, the clamping cylinder can provide sufficient clamping force to ensure that the battery pack housing 20 remains firmly clamped during operation. This helps prevent the battery pack from loosening or shifting during processing, ensuring the safety and stability of the operation.

[0077] In one embodiment of the present application, there are four clamping cylinders, wherein two first clamping cylinders 31 clamp the first end of the shell 20, and two second clamping cylinders 32 clamp the second end of the shell 20, and the first end and the second end of the shell 20 are arranged opposite to each other.

[0078] By adopting the above technical solution, by using two clamping cylinders to clamp the first end of the shell 20 and two clamping cylinders to clamp the second end of the shell 20, balanced clamping of the entire shell 20 can be achieved. This ensures that the shell 20 is subjected to a balanced force during the clamping process, avoiding deformation or damage of the shell 20 caused by uneven clamping force.

[0079] In one embodiment of the present application, the telescopic member 74 is a hydraulic telescopic rod.

[0080] By adopting the above technical solution, the hydraulic telescopic rod has good motion control performance and can achieve smooth telescopic movement. Through the adjustment and control of the hydraulic system, the speed and position of the telescopic rod can be accurately controlled to meet different operating requirements.

[0081] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A battery pack laser welding machine, characterized in that: include: A supporting platform, used to support a housing loaded with a battery pack; A laser welding part, used for laser welding the battery pack in the shell; A driving assembly, disposed on one side of the supporting platform, for driving the laser welding component to move along the arrangement direction of the battery packs, so that the laser welding component can continuously laser weld each battery pack in the housing; The clamping assembly is connected to one side of the output end of the laser welding component. When the laser welding component continuously laser welds the battery packs in the shell, the clamping state of the battery pack to be welded is always maintained.

2. The battery pack laser welding machine according to claim 1, characterized in that: The clamping assembly comprises: A strip plate connected to the output end of the laser welding; A U-shaped pressure wheel bar frame, wherein the bent portion of the U-shaped pressure wheel bar frame is connected to the strip plate; and The pressing wheel is rotatably connected to the two free ends of the U-shaped pressing wheel bar frame and can be rolled and pressed on each battery pack.

3. The battery pack laser welding machine according to claim 2, characterized in that: The clamping assembly also includes: A telescopic member, wherein the fixed end of the telescopic member is connected to the strip plate, the telescopic shaft of the telescopic member is rotatably connected to the U-shaped pressure wheel frame, and the U-shaped pressure wheel frame is rotatably connected to the strip plate.

4. The battery pack laser welding machine according to claim 2 or 3, characterized in that: The output end of the laser welding part is also rotatably connected with a carrier plate, the carrier plate is located above the strip plate, and the carrier plate is connected to the driving assembly and can move with the driving assembly; The carrier plate is provided with a first driving member for driving the laser welding member to rotate relative to the carrier plate, thereby driving the clamping assembly to change direction.

5. The battery pack laser welding machine according to claim 1, characterized in that: The drive assembly comprises: The transverse movement module is arranged on one side of the supporting platform, and the transverse movement module is used to drive the laser welding part to reciprocate along the X direction.

6. The battery pack laser welding machine according to claim 5, characterized in that: The drive assembly also includes: The longitudinal movement module is arranged between the laser welding component and the transverse movement module. The longitudinal movement module is connected to the transverse movement module, and the transverse movement module is used to drive the longitudinal movement module to reciprocate along the X direction; the laser welding component is connected to the longitudinal movement module, and the longitudinal movement module is used to drive the laser welding component to reciprocate along the Z direction.

7. The battery pack laser welding machine according to claim 6, characterized in that: The drive assembly also includes: The horizontal module is arranged between the laser welding component and the longitudinal movement module. The horizontal module is connected to the longitudinal movement module, and the longitudinal movement module is used to drive the horizontal module to reciprocate along the Z direction; the laser welding component is connected to the horizontal module, and the horizontal module is used to drive the laser welding component to reciprocate along the Y direction.

8. The battery pack laser welding machine according to claim 1, characterized in that: The support platform is provided with a clamping cylinder for clamping the shell loaded with the battery pack.

9. The battery pack laser welding machine according to claim 8, characterized in that: There are four clamping cylinders, wherein two first clamping cylinders clamp the first end of the shell, and two second clamping cylinders clamp the second end of the shell. The first end and the second end of the shell are arranged opposite to each other.

10. The battery pack laser welding machine according to claim 3, characterized in that: The telescopic member is a hydraulic telescopic rod.

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