Battery laser welding machine

Abstract

The utility model provides a battery laser welding machine which comprises a mounting frame, an optical fiber connector, a laser head, a pressing driving mechanism, a mounting plate, a first pressing head and a second pressing head, the optical fiber connector and the laser head are arranged on the mounting frame, and the optical fiber connector is used for being connected with an optical fiber laser; laser emitted by the optical fiber laser enters the laser head through the optical fiber connector and is emitted downwards through the laser head; the pressing driving mechanism is arranged at the bottom of the mounting frame, the mounting plate is connected to a movable part of the pressing driving mechanism, and the pressing driving mechanism is used for driving the mounting plate to ascend and descend; the first pressing head is mounted on the bottom surface of the mounting plate and is used for pressing the first type of batteries; a plurality of first mounting holes are formed in the first pressing head, the second pressing head can be detachably fixed to the bottom of the first pressing head through the first mounting holes, and the second pressing head is used for pressing the second type of batteries. According to the battery laser welding machine, at least two types of batteries can be pressed and subjected to laser welding, and the compatibility of the battery laser welding machine is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of laser equipment production, in particular to a battery laser welding machine. BACKGROUND

[0002] Laser welding is a new type of welding method that mainly targets thin-walled materials and precision parts, which uses high-energy laser to locally heat a small area of the material. The energy of the laser radiation spreads to the interior of the material through heat conduction, melts the material, and forms a specific molten pool.

[0003] During the production of lithium batteries, laser welding is often used to weld the lithium battery, such as welding the pole or the tab. In order to ensure the welding effect, a pressure head is needed to press the pole to be welded. Common lithium batteries are mainly divided into square batteries, soft-pack batteries, and cylindrical batteries, and different pressure heads are needed during the welding process. The existing battery laser welding machine is provided with a single type of pressure head, so it can only implement welding on one specific type of lithium battery, and the compatibility is poor. CONTENT OF THE INVENTION

[0004] In order to solve the above technical problems existing in the existing plug laser welding machine, the present application provides a battery laser welding machine, and the specific technical scheme is as follows:

[0005] A battery laser welding machine comprises a mounting frame, a fiber joint, a laser head, a pressing driving mechanism, a mounting plate, a first pressure head, and a second pressure head, wherein:

[0006] The fiber joint and the laser head are arranged on the mounting frame, wherein the fiber joint is used to connect a fiber laser, the laser emitted by the fiber laser enters the laser head through the fiber joint, and is emitted downward through the laser head;

[0007] The pressing driving mechanism is arranged at the bottom of the mounting frame, the mounting plate is connected to the movable part of the pressing driving mechanism, and the pressing driving mechanism is used to drive the mounting plate to ascend and descend;

[0008] The first pressure head is installed on the bottom surface of the mounting plate, and is used to press the first type of battery;

[0009] A plurality of first mounting holes are arranged on the first pressure head, and the second pressure head can be detachably fixed to the bottom of the first pressure head through the first mounting holes, and the second pressure head is used to press the second type of battery.

[0010] When laser welding of the first type of battery is needed to be implemented, the pressing driving mechanism drives the first pressing head to lift, so that the first pressing head presses the first type of battery, and then the laser head projects laser to the welding target of the first type of battery which is pressed, so that the laser welding of the first type of battery is implemented. When laser welding of the second type of battery is needed to be implemented, the second pressing head is first installed to the bottom of the first pressing head, the pressing driving mechanism drives the first pressing head and the second pressing head to lift synchronously, so that the second pressing head presses the second type of battery, and then the laser head projects laser to the welding target of the second type of battery which is pressed, so that the laser welding of the second type of battery is implemented.

[0011] It can be seen that the battery laser welding machine provided by the application can at least implement pressing and laser welding of two types of batteries, and the compatibility of the battery laser welding machine is improved.

[0012] In some embodiments, the first type of battery is a square battery, and the first pressing head has a horizontal pressing surface.

[0013] The surfaces of the square battery are all planes, and the first pressing head with the horizontal pressing surface can press the welding target onto the surface of the square battery, so that the welding effect on the welding target is finally ensured.

[0014] In some embodiments, the second type of battery is a soft package battery, and the second pressing head comprises a connecting portion and a pressing portion, wherein: the connecting portion is provided with a plurality of second mounting holes corresponding to the first mounting holes one by one, and the connecting portion is fixed to the bottom of the first pressing head through fastening bolts penetrating the second mounting holes and the first mounting holes; the pressing portion protrudes downward from the connecting portion, and a strip-shaped first pressing groove is formed in the pressing portion.

[0015] Through the setting of the second pressing head, the second pressing head can be detachably fixed to the bottom of the first pressing head by the fastening bolts. When the second pressing head presses the soft package battery downward, the welding target can be pressed onto the surface of the soft package battery by the first pressing groove, so that the welding effect on the welding target is finally ensured.

[0016] In some embodiments, the first pressing head is connected to the mounting plate in an up-and-down floating manner through a plurality of buffer connecting pieces.

[0017] When the first pressing head or the second pressing head implements pressing on the battery, the first pressing head and the second pressing head can produce adaptive floating, so that the pressing surface of the first pressing head or the second pressing head can tightly contact the surface of the battery, and the welding target can be firmly pressed onto the surface of the battery.

[0018] In some embodiments, the buffer connecting piece comprises a guide column and a spring, wherein the upper end of the guide column is connected to the movable part of the pressing driving mechanism in an up-and-down sliding manner, and the lower end of the guide column is fixedly connected to the mounting plate; the spring is sleeved on the guide column, and the upper and lower ends of the spring are respectively abutted against the movable part of the pressing driving mechanism and the mounting plate.

[0019] A simple buffer connector is provided, which can contract under pressure and spring back to its original position after decompression.

[0020] In some embodiments, the pressing drive mechanism includes a cylinder and a drive plate, wherein the cylinder body is fixedly mounted on the mounting bracket, the cylinder extension rod is arranged in a vertical direction, the drive plate is connected to the cylinder extension rod, and the mounting plate is connected to the drive plate; the cylinder drives the mounting plate to rise and fall via the drive plate.

[0021] The cylinder is lightweight and has a fast drive speed, which can drive the pressure head to quickly press and release the battery, improving the efficiency of laser welding.

[0022] In some embodiments, the laser head includes a galvanometer and a field lens, wherein the galvanometer is mounted on a mounting bracket and the field lens is connected to the bottom of the galvanometer; the laser emitted by the fiber laser enters the galvanometer through a fiber optic connector, the galvanometer is used to deflect and adjust the laser, and the field lens is used to focus the laser after the deflection adjustment is completed and emit it downward.

[0023] By using a galvanometer and a field lens, the laser can be focused onto the target object for laser welding.

[0024] In some embodiments, the battery laser welding machine further includes an air curtain assembly connected to the galvanometer via a connecting rod and located below the field mirror. The air curtain assembly is configured to blow air in a horizontal direction to form an air curtain below the field mirror.

[0025] To prevent the fumes generated during laser welding from contaminating the field lens.

[0026] In some embodiments, the battery laser welding machine further includes a third pressure head; the first pressure head is also provided with a bayonet, and the third pressure head can be detachably fixed to the bottom of the first pressure head via the bayonet, and the third pressure head is used to press the third type of battery.

[0027] When laser welding of the third type of battery is required, the third pressure head is first installed at the bottom of the first pressure head. The clamping drive mechanism drives the first and third pressure heads to rise and fall synchronously, so that the third pressure head can clamp the third type of battery. Then, the laser head projects the laser onto the clamped welding target on the third type of battery, thus performing laser welding on the third type of battery. In other words, the battery laser welding machine provided in this application can perform clamping and laser welding on at least three types of batteries, improving the compatibility of the battery laser welding machine.

[0028] In some embodiments, the third type of battery is a cylindrical battery, and the third pressure head includes a snap-fit ​​portion and a pressing portion, wherein the snap-fit ​​portion matches the snap-fit ​​opening, and the pressing portion has a rectangular second pressing groove inside.

[0029] By configuring the third pressure head, it can be snapped and fixed to the bottom of the first pressure head. When the third pressure head presses down on the cylindrical battery, the welding target can be pressed against the end of the cylindrical battery by the second clamping groove, ultimately ensuring the welding effect on the welding target. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the battery laser welding machine in one working state according to an embodiment of this application;

[0031] Figure 2 for Figure 1 A magnified view of region A in the image;

[0032] Figure 3 This is a schematic diagram of the battery laser welding machine in another working state according to an embodiment of this application;

[0033] Figure 4 for Figure 3 A magnified view of region B in the image;

[0034] Figure 5 This is a schematic diagram of the structure of the second pressure head in an embodiment of this application;

[0035] Figure 6 This is a schematic diagram of the battery laser welding machine in another working state according to an embodiment of this application;

[0036] Figure 7 for Figure 6 A magnified view of region C in the image;

[0037] Figure 8 This is a schematic diagram of the structure of the third pressure head in an embodiment of this application.

[0038] Figures 1 to 8 Includes:

[0039] Mounting bracket 1;

[0040] Fiber optic connector 2;

[0041] Laser head 3: galvanometer 31, field lens 32;

[0042] Pressing drive mechanism 4: cylinder 41, drive plate 42;

[0043] Mounting plate 5;

[0044] First pressure head 6: First mounting hole 61, bayonet 62;

[0045] Second pressure head 7: connecting part 71, pressing part 72, first pressing groove 73, second mounting hole 74;

[0046] Buffer connector 8;

[0047] The air curtain assembly 9;

[0048] The third pressure head 10 includes a clamping portion 11, a pressing portion 12, and a second pressing groove 13. DETAILED DESCRIPTION

[0049] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0050] As described in the background section, the existing battery laser welding machine is provided with a single type of pressure head, and thus it can only implement welding on a specific type of lithium battery, and the compatibility is poor.

[0051] Therefore, the present application provides a battery laser welding machine which can at least implement pressing and laser welding on two types of batteries, thereby improving the compatibility of the battery laser welding machine.

[0052] As shown in Figures 1 to 5 The battery laser welding machine in the embodiment of the present application includes a mounting frame 1, a fiber joint 2, a laser head 3, a pressing driving mechanism 4, a mounting plate 5, a first pressure head 6 and a second pressure head 7, wherein:

[0053] The fiber joint 2 and the laser head 3 are arranged on the mounting frame 1, wherein the fiber joint 2 is used to connect a fiber laser (not shown in the figure), and the laser emitted by the fiber laser enters the laser head 3 through the fiber joint 2 and is emitted downward through the laser head 3.

[0054] The pressing driving mechanism 4 is arranged at the bottom of the mounting frame 1, and the mounting plate 5 is connected to the movable part of the pressing driving mechanism 4, and the pressing driving mechanism 4 is used to drive the mounting plate 5 to ascend and descend.

[0055] The first pressure head 6 is installed on the bottom surface of the mounting plate 5, and the first pressure head 6 is used to press the first type of battery.

[0056] The first pressure head 6 is provided with a plurality of first mounting holes 61, and the second pressure head 7 can be detachably fixed to the bottom of the first pressure head 6 through the plurality of first mounting holes 61, and the second pressure head 7 is used to press the second type of battery.

[0057] When it is necessary to implement laser welding on the first type of battery, first, the first pressure head 6 is driven to ascend and descend by the pressing driving mechanism 4, so that the first pressure head 6 presses the welding target on the first type of battery. Subsequently, the laser head 3 projects the laser to the pressed welding target on the first type of battery, and the laser welding on the welding target on the first type of battery can be implemented.

[0058] When laser welding of the second type of battery is needed to be implemented, the second pressing head 7 is first installed to the bottom of the first pressing head 6 through the first mounting hole 61. Then, the pressing driving mechanism drives the first pressing head 6 and the second pressing head 7 to synchronously ascend and descend, so that the second pressing head 7 presses the welding target on the second type of battery. Subsequently, the laser head 3 projects laser to the pressed welding target on the second type of battery, and laser welding of the welding target on the second type of battery can be implemented.

[0059] It can be seen that the battery laser welding machine in the embodiment of the present application can at least implement pressing and laser welding of two types of batteries, thereby improving the compatibility of the battery laser welding machine.

[0060] Optionally, the first type of battery is a square battery, and the first pressing head 6 has a horizontal pressing surface. The surfaces of the square battery are all planes, and the first pressing head 6 with the horizontal pressing surface can press the welding target (such as a tab) to the surface of the square battery, and finally ensure the welding effect of the welding target.

[0061] Optionally, the second type of battery is a soft package battery, as shown in Figures 3 to 5 The second pressing head 7 includes a connecting portion 71 and a pressing portion 72, wherein: the connecting portion 71 is provided with a plurality of second mounting holes 74 corresponding to the first mounting holes 61 one by one, and the connecting portion 71 is fixed to the bottom of the first pressing head 6 through fastening bolts penetrating the second mounting holes 74 and the first mounting holes 61. The pressing portion 72 protrudes downward from the connecting portion 71, and a strip-shaped first pressing groove 73 is formed in the pressing portion 72.

[0062] When the pressing driving mechanism 4 drives the second pressing head 7 to descend, the second pressing head 7 presses the welding target on the soft package battery to the surface of the soft package battery through the first pressing groove 73, and finally ensures the welding effect of the welding target.

[0063] As shown in Figure 2 and Figure 4 Optionally, the first pressing head 6 is connected to the mounting plate 5 through a plurality of (for example, four in the figure) buffering connecting pieces 8 which can float up and down. In this way, when the first pressing head 6 or the second pressing head 7 implements pressing of the battery, the first pressing head 6 and the second pressing head 7 can produce adaptive floating, thereby ensuring that the pressing surface of the first pressing head 6 or the second pressing head 7 can tightly contact the surface of the battery, and the welding target can be firmly pressed to the surface of the battery.

[0064] Optionally, the buffer connecting piece 8 comprises a guide column and a spring, wherein the upper end of the guide column is connected to the movable part of the pressing driving mechanism in a lifting and sliding manner, the lower end of the guide column is fixedly connected to the mounting plate, the spring is sleeved on the guide column, and the upper and lower ends of the spring are respectively abutted against the movable part of the pressing driving mechanism and the mounting plate. In the natural state, the spring is naturally elongated, and when the first pressing head 6 or the second pressing head 7 performs the pressing on the battery, the spring is compressed to make the first pressing head 6 or the second pressing head 7 elastically press against the surface of the battery.

[0065] As shown in Figure 1 and Figure 3 Optionally, the pressing driving mechanism 4 comprises a cylinder 41 and a driving plate 42, wherein the cylinder body of the cylinder 41 is fixedly mounted on the mounting frame 1, the telescopic rod of the cylinder 41 is arranged in the vertical direction, the driving plate 42 is connected to the telescopic rod of the cylinder 41, and the mounting plate 5 is connected to the driving plate 42. The cylinder 41 drives the mounting plate 5 to lift and descend through the driving plate 42.

[0066] The cylinder 41 is light in weight and fast in driving speed, which can drive the first pressing head 6 or the second pressing head 7 to perform the fast pressing and releasing on the battery, thereby improving the laser welding efficiency.

[0067] As shown in Figure 1 and Figure 3 Optionally, the laser head 3 comprises a galvanometer 31 and a field lens 32, wherein the galvanometer 31 is mounted on the mounting frame 1, and the field lens 32 is connected to the bottom of the galvanometer 31. The laser emitted by the fiber laser enters into the galvanometer 31 through the fiber joint 2, the galvanometer 31 is used for adjusting the deflection of the laser, and the field lens 32 is used for focusing the laser after the deflection adjustment and then emitting the laser downward.

[0068] Through the cooperation of the galvanometer 31 and the field lens 32, it is ensured that the laser can be gathered to the welding target on the battery located below the field lens 32, and the laser welding on the welding target is implemented.

[0069] As shown in Figure 1 and Figure 3 Optionally, the battery laser welding machine in the embodiment of the application further comprises an air curtain assembly 9, the air curtain assembly 9 is connected to the galvanometer 31 through a connecting rod and is located below the field lens 32, and the air curtain assembly 9 is configured to blow air at a high speed in the horizontal direction, so as to form an air curtain below the field lens 32. The air curtain can block the smoke generated in the welding process, so as to prevent the smoke generated in the laser welding process from rising and polluting the field lens. The air curtain assembly 9 may, for example, be a high-pressure nozzle connected to a compressed air source through an air pipe.

[0070] As shown in Figures 6 to 8 Optionally, the battery laser welding machine in the embodiment of the application further comprises a third pressing head 10. As shown in Figure 2As shown, the first pressing head 6 is further provided with a bayonet 62, and the third pressing head 10 can be detachably fixed to the bottom of the first pressing head 6 through the bayonet 62, and the third pressing head 10 is used for pressing the third type of battery.

[0071] When the laser welding of the third type of battery needs to be implemented, the third pressing head 10 is first installed to the bottom of the first pressing head 6. Then, the pressing driving mechanism 4 drives the first pressing head 6 and the third pressing head 10 to synchronously ascend and descend, so that the third pressing head 10 presses the welding target on the third type of battery. Then, the laser head 3 projects the laser to the pressed welding target on the third type of battery, and the laser welding of the third type of battery can be implemented.

[0072] That is, by setting the third pressing head 10, the battery laser welding machine in the embodiment of the present application can at least implement the pressing and laser welding of three types of batteries, thereby further improving the compatibility of the battery laser welding machine.

[0073] Optionally, the third type of battery is a cylindrical battery, such as Figures 7 to 8 As shown, the third pressing head 10 includes a clamping part 11 and a pressing part 12, wherein the clamping part 11 is matched with the bayonet 62 on the first pressing head 6, and the pressing part 12 is provided with a rectangular second pressing groove 13.

[0074] By setting the third pressing head 10, the third pressing head 10 can be clamped and fixed to the bottom of the first pressing head 6. When the third pressing head 10 presses the cylindrical battery downward, the welding target can be pressed to the end of the cylindrical battery by the second pressing groove 13, and finally the welding effect of the welding target is ensured.

[0075] The above description of the present application is sufficiently detailed and has certain particularity. It should be understood by those skilled in the art that the description in the embodiments is only exemplary, and all changes made without departing from the true spirit and scope of the present application should belong to the protection scope of the present application. The scope of protection claimed by the present application is defined by the claims, not by the above description of the embodiments.

Claims

1. A battery laser welder characterized by, It includes a mounting frame, a fiber joint, a laser head, a pressing driving mechanism, a mounting plate, a first pressing head and a second pressing head, wherein: The fiber joint and the laser head are arranged on the mounting frame, wherein the fiber joint is used to connect a fiber laser, the laser emitted by the fiber laser enters the laser head through the fiber joint, and is emitted downward through the laser head; The pressing driving mechanism is arranged at the bottom of the mounting frame, the mounting plate is connected to the movable part of the pressing driving mechanism, and the pressing driving mechanism is used to drive the mounting plate to rise and fall; The first pressing head is installed on the bottom surface of the mounting plate, and the first pressing head is used to press the first type of battery; A plurality of first mounting holes are arranged on the first pressing head, and the second pressing head can be detachably fixed to the bottom of the first pressing head through the first mounting holes, and the second pressing head is used to press the second type of battery.

2. The battery laser welder of claim 1, wherein, The first type of battery is a square battery, and the first pressing head has a horizontal pressing surface.

3. The battery laser welder of claim 1, wherein, The second type of battery is a soft package battery, and the second pressing head includes a connecting part and a pressing part, wherein: A plurality of second mounting holes corresponding to the first mounting holes are arranged on the connecting part, and the connecting part is fixed to the bottom of the first pressing head through fastening bolts penetrating the second mounting holes and the first mounting holes; The pressing part protrudes downward from the connecting part, and a strip-shaped first pressing groove is formed in the pressing part.

4. The battery laser welder of claim 1, wherein, The first pressing head is connected to the mounting plate through a plurality of buffer connecting pieces in an up-and-down floating manner.

5. The battery laser welder of claim 4, wherein, The buffer connecting piece includes a guide column and a spring, wherein the upper end of the guide column is connected to the movable part of the pressing driving mechanism in an up-and-down sliding manner, and the lower end of the guide column is fixedly connected to the mounting plate; The spring is sleeved on the guide column, and the upper and lower ends of the spring are respectively abutted against the movable part of the pressing driving mechanism and the mounting plate.

6. The battery laser welder of claim 1, wherein, The pressing driving mechanism includes a cylinder and a driving plate, wherein the cylinder body of the cylinder is fixedly installed on the mounting frame, the telescopic rod of the cylinder is arranged in a vertical direction, the driving plate is connected to the telescopic rod of the cylinder, and the mounting plate is connected to the driving plate; The cylinder drives the mounting plate to rise and fall through the driving plate.

7. The battery laser welder of claim 6, wherein, The laser head includes a galvanometer and a field lens, wherein the galvanometer is installed on the mounting frame, and the field lens is connected to the bottom of the galvanometer; The laser emitted by the fiber laser enters the galvanometer through the fiber joint, the galvanometer is used to adjust the deflection of the laser, and the field lens is used to focus the laser after the deflection adjustment and emit it downward.

8. The battery laser welder of claim 7, wherein, The battery laser welding machine further includes an air curtain assembly, the air curtain assembly is connected to the galvanometer through a connecting rod and is located below the field lens, and the air curtain assembly is configured to blow air in a horizontal direction to form an air curtain below the field lens.

9. The battery laser welder of any one of claims 1 to 8, wherein, The battery laser welding machine further includes a third pressing head; The first pressing head further has a bayonet, and the third pressing head can be detachably fixed to the bottom of the first pressing head through the bayonet, and the third pressing head is used to press the third type of battery.

10. The battery laser welder of claim 9, wherein, The third type of battery is a cylindrical battery, and the third pressing head comprises a clamping portion and a pressing portion, wherein the clamping portion is matched with the clamping hole, and the pressing portion is provided with a rectangular second pressing groove.

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