Lithium battery water cooling plate welding equipment and method

Abstract

According to the lithium battery water cooling plate welding equipment and method, a workpiece is placed between a bearing platform and a pressing block, so that the workpiece can be pressed by the pressing block, a lifting driving part is started, two lifting plates descend and press the edges of the two sides of the workpiece, a horizontal driving part is started, and the workpiece is welded to the bearing platform; the two output parts push the pressing block in two opposite directions in the horizontal direction, so that the pressing block is located in the center of the workpiece, the to-be-welded position of the workpiece is located between the pressing block and the lifting plate, after the pressing block is in place, the two output parts are both separated from the pressing block to prevent the pressing block from blocking the welding head, then the welding head is aligned to the position between the lifting plate and the pressing block, and the welding head is welded. A welding area is arranged between the pressing block and the lifting plate, the welding area and the fusion depth can be accurately controlled, material deformation is avoided, welding residual stress is reduced, and due to the fact that the pressing block and the lifting plate press the workpiece in the welding process, even if a formed welding seam is narrow, the welding seam can not be damaged. And the connection strength of the welded workpiece can be guaranteed, and the welding quality is improved.

Description

Technical Field

[0001] The present invention relates to the field of welding, and in particular to a lithium battery water cooling plate welding device and method. Background Art

[0002] With the increasing popularity of electronic components, lithium batteries play an increasingly important role in our lives. In the manufacturing process of lithium batteries, the sealing welding of the water-cooled plate is the most critical step. Although the existing welding technology has made great progress, there are still different welding methods and their respective advantages and disadvantages. In order to improve the performance of lithium batteries, the lithium batteries on the market are becoming thinner and thinner, and the welding difficulty and requirements for welding quality are also getting higher and higher. In the existing welding method, because the water-cooled plate is too thin, it is easy to deform during the welding process, and in order to ensure the connection strength of the workpiece after welding, the weld formed is also wider, and the welding quality is not high. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a lithium battery water cooling plate welding device and method, which can solve the problem of low welding quality of the existing lithium battery water cooling plate.

[0004] The technical solution adopted by the present invention to solve the technical problem is: on the one hand, a lithium battery water cooling plate welding device is provided, comprising:

[0005] A support platform, the support platform is used to place the workpiece;

[0006] A pressing block, the pressing block is located above the support platform and is used to press the center of the workpiece;

[0007] Two lifting plates are arranged opposite to each other, and both of the lifting plates are located above the support platform;

[0008] A lifting drive member, the lifting drive member is used to drive the lifting plate to lift and lower, so that the lifting plate abuts against or separates from the edge of the workpiece;

[0009] A horizontal driving member, wherein the horizontal driving member comprises two output parts, the two output parts are respectively mounted on the two lifting plates, and the two output parts both move in the horizontal direction and in opposite directions, so that the two output parts abut against or separate from the pressing block in two opposite directions in the horizontal direction;

[0010] A welding head is used for welding workpieces.

[0011] As a further improvement of the above technical solution, the lifting drive component includes two lifting cylinders, and the two lifting plates are respectively installed on the two lifting cylinders; a first limit block and a second limit block are arranged below the lifting plate, and the first limit block and the second limit block are arranged opposite to each other, and limiting parts are arranged on the inner sides of the first limit block and the second limit block and near their lower ends; the lifting cylinder includes a lifting cylinder body and a lifting piston rod, one end of the lifting piston rod is slidably connected to the lifting cylinder body, and the other end is connected to a first ring plate, and the first ring plate abuts against the upper surfaces of the two limit parts.

[0012] As a further improvement of the above technical solution, the lifting piston rod is also connected to a second ring piece, the second ring piece is in contact with the lower surfaces of the two limiting parts, and the two limiting parts are clamped between the first ring piece and the second ring piece.

[0013] As a further improvement of the above technical solution, the horizontal driving component includes two slide cylinders, and the two slide cylinders are respectively installed on the two lifting plates; the slide cylinder includes a horizontal cylinder body, a horizontal piston rod, and a horizontal slide, one end of the horizontal piston rod is slidably connected to the horizontal cylinder body, and the other end is fixedly connected to the horizontal slide, the horizontal slide is slidably connected to the horizontal cylinder body, and the horizontal slide is used to abut or separate from the pressure block.

[0014] As a further improvement of the above technical solution, the inner sides of the two lifting plates are both arranged as inclined surfaces, and the distance between the two lifting plates gradually increases in the vertical upward direction.

[0015] As a further improvement of the above technical solution, two horizontal driving members are provided, and the two horizontal driving members are arranged in a horizontal direction, and the arrangement direction of the two is perpendicular to the moving direction of the output part.

[0016] As a further improvement of the above technical solution, it also includes a picking device, which is used to pick up and place the pressing block.

[0017] On the other hand, a lithium battery water cooling plate welding method is also provided, using the aforementioned lithium battery water cooling plate welding equipment, and the welding steps include:

[0018] S1, placing the workpiece between the support platform and the pressing block;

[0019] S2, the two lifting driving members are started, so that the two lifting plates descend and abut against the edges of the workpiece;

[0020] S3, the two output parts are respectively in contact with the pressing block in two opposite directions in the horizontal direction, so that the pressing block is located at the center of the workpiece, and the part to be welded of the workpiece is located between the lifting plate and the pressing block, and then the two output parts are separated from the pressing block;

[0021] S4, the welding head is aligned between the lifting plate and the pressing block, and moves along the to-be-welded portion of the workpiece to perform welding;

[0022] S5. After welding is completed, the two lifting driving members are started in reverse, so that the two lifting plates rise, the pressing blocks are removed, and the welded workpiece is taken out.

[0023] As a further improvement of the above technical solution, the following steps are also included after step S3 and before step S4: S31, the moving trajectory of the welding head during simulated welding moves along the part to be welded of the workpiece, and checks whether the moving trajectory of the welding head coincides with the part to be welded of the workpiece.

[0024] As a further improvement of the above technical solution, in step S4, the part of the workpiece to be welded is surrounded by the pressing block.

[0025] The beneficial effects of the present invention are as follows: by placing the workpiece between the support platform and the pressure block, the workpiece can be pressed by the pressure block, the lifting drive component is started, the two lifting plates are lowered and press the two side edges of the workpiece, the horizontal drive component is started, and the two output parts push the pressure blocks in two opposite directions in the horizontal direction, so that the pressure blocks are located at the center of the workpiece, and the part to be welded of the workpiece is located between the pressure blocks and the lifting plates. After the pressure blocks are in place, the two output parts are separated from the pressure blocks to prevent them from blocking the welding head, and then the welding head is aligned between the lifting plates and the pressure blocks, and moved along the part to be welded of the workpiece for welding. The welding area is between the pressure blocks and the lifting plates, and the welding area and the penetration depth can be accurately controlled to avoid material deformation and reduce welding residual stress. Moreover, since the pressure blocks and the lifting plates press the workpiece during welding, even if the weld formed is narrow, the connection strength of the workpiece after welding can be guaranteed, thereby improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0027] Figure 1 It is a structural schematic diagram of a lithium battery water cooling plate welding device provided in a preferred embodiment of the present invention;

[0028] Figure 2 It is a structural schematic diagram of a partial structure of a lithium battery water cooling plate welding device provided in a preferred embodiment of the present invention;

[0029] Figure 3It is a structural schematic diagram of a partial structure of a lithium battery water cooling plate welding device provided by a preferred embodiment of the present invention from another angle;

[0030] Reference numerals: 1, support platform, 2, pressing block, 3, lifting driving member, 4, horizontal driving member, 5, welding head;

[0031] 31. lifting plate, 32. lifting cylinder, 33. first limit block, 34. second limit block, 35. limit part, 41. slide cylinder;

[0032] 311. Inclined surface; 321. Lifting cylinder; 322. Lifting piston rod; 323. First ring piece; 324. Second ring piece; 411. Horizontal cylinder; 412. Horizontal piston rod; 413. Horizontal slide; 414. Abutment plate; 415. Slide plate. DETAILED DESCRIPTION

[0033] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work belong to the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. For example, fixed connection / fixed installation can be selected according to the needs of screw connection, bolt connection, pin connection, key connection, bonding, mortise and tenon connection, welding, riveting and other methods. For example, detachable connection can be selected according to the needs of screw connection, bolt connection, threaded connection, snap connection, mortise and tenon connection, Velcro connection and other methods. The various technical features in the invention can be combined interactively without conflicting with each other.

[0034] See also Figure 1The preferred embodiment of the present invention provides a lithium battery water-cooling plate welding device, including a base 1, a pressure block 2, two relatively arranged lifting plates 31, a lifting drive 3, a horizontal drive 4, and a welding head 5. The base 1 is used to place the workpiece; the pressure block 2 is located above the base 1, and the pressure block 2 is used to press the center of the workpiece; and the two lifting plates 31 are both located above the base 1; the lifting drive 3 is used to drive the lifting plate 31 to rise and fall, so that the lifting plate 31 abuts against or separates from the edge of the workpiece; the horizontal drive 4 includes two output parts, the two output parts are respectively installed on the two lifting plates 31, and the two output parts both move in the horizontal direction and the two moving directions are opposite, so that the two output parts abut against or separate from the pressure block 2 in two opposite directions in the horizontal direction; the welding head 5 is used to weld the workpiece. By placing the workpiece between the support platform 1 and the pressure block 2, the workpiece can be pressed by the pressure block 2, and the lifting drive 3 is started, so that the two lifting plates 31 descend and press the two side edges of the workpiece, and the horizontal drive 4 is started, and the two output ends push the pressure block 2 in two opposite directions in the horizontal direction, so that the pressure block 2 is located at the center of the workpiece, and the welding part of the workpiece is located between the pressure block 2 and the lifting plate 31. After the pressure block 2 is in place, the two output parts are separated from the pressure block 2 to prevent it from blocking the welding head 5, and then the welding head 5 is aligned between the lifting plate 31 and the pressure block 2, and moved along the welding part of the workpiece to be welded for welding. The welding area is between the pressure block 2 and the lifting plate 31, and the welding area and the penetration depth can be accurately controlled to avoid material deformation and reduce welding residual stress. Moreover, since the pressure block 2 and the lifting plate 31 press the workpiece during welding, even if the weld formed is narrow, the connection strength of the workpiece after welding can be guaranteed, thereby improving the welding quality.

[0035] See also Figure 2 The lifting drive member 3 includes two lifting cylinders 32, and the two lifting plates 31 are respectively installed on the two lifting cylinders 32; a first limit block 33 and a second limit block 34 are arranged below the lifting plate 31, and the first limit block 33 and the second limit block 34 are arranged opposite to each other, and a limit portion 35 is arranged on the inner side of the first limit block 33 and the second limit block 34 and near their lower ends; the lifting cylinder 32 includes a lifting cylinder body 321 and a lifting piston rod 322, one end of the lifting piston rod 322 is slidably connected to the lifting cylinder body 321, and the other end is connected to a first ring piece 323, and the first ring piece 323 abuts against the upper surfaces of the two limit portions 35. During the ascending process, the lifting piston rod 322 extends upward relative to the lifting cylinder body 321 and drives the lifting plate 31 to ascend; during the descending process, the lifting piston rod 322 retracts relative to the lifting cylinder body 321. Since the first ring piece 323 abuts against both the first limit block 33 and the second limit block 34, the lifting plate 31 can descend accordingly, thereby realizing the abutment and separation of the lifting plate 31 and the workpiece.

[0036] The lifting piston rod 322 is also connected to a second ring piece 324, which is in contact with the lower surfaces of the two limit parts 35, and the two limit parts 35 are clamped between the first ring piece 323 and the second ring piece 324. During the lifting and lowering process of the lifting piston rod 322, the first limit block 33 and the second limit block 34 are always clamped between the first ring piece 323 and the second ring piece 324, so as to drive the lifting plate 31 to rise and fall during the lifting and lowering process of the lifting piston rod 322.

[0037] In this embodiment, two lifting piston rods 322 are provided, and the two lifting piston rods 322 are both connected with a first ring piece 323 and a second ring piece 324. Two first limit blocks 33 are provided, and the second limit block 34 is located between the two first limit blocks 33. Two limit parts 35 are provided on the second limit block 34. A group of first ring pieces 323 and second ring pieces 324 clamp the two limit parts 35 to ensure that the lifting piston rod 322 is firmly connected to the lifting plate 31 to drive the lifting plate 31 to rise and fall smoothly.

[0038] See also Figure 3 The horizontal driving member 4 includes two slide cylinders 41, which are respectively mounted on two lifting plates 31; the slide cylinder 41 includes a horizontal cylinder body 411, a horizontal piston rod 412, and a horizontal slide 413. One end of the horizontal piston rod 412 is slidably connected to the horizontal cylinder body 411, and the other end is fixedly connected to the horizontal slide 413. The horizontal slide 413 is slidably connected to the horizontal cylinder body 411, and the horizontal slide 413 is used to abut or separate from the pressing block 2. The horizontal piston rod 412 can be extended and retracted relative to the horizontal cylinder body 411, driving the horizontal slide 413 to slide on the horizontal cylinder body 411, and the horizontal slide 413 is abutted against or separated from the pressing block 2 during the extension and retraction of the horizontal piston rod 412.

[0039] In this embodiment, the horizontal slide 413 includes an abutment plate 414 and a slide plate 415, which are connected in an L shape. The abutment plate 414 is arranged in the vertical direction, and the slide plate 415 is arranged in the horizontal direction. The slide plate 415 is slidably connected to the horizontal cylinder body 411, and the abutment plate 414 is connected to the horizontal piston rod 412. The horizontal piston rod 412 drives the abutment plate 414 to move toward or away from the pressure block 2. At the same time, the slide plate 415 slides relative to the horizontal cylinder body 411. The horizontal slide 413 has high movement accuracy and strong load capacity.

[0040] The inner sides of the two lifting plates 31 are both set as inclined surfaces 311, and the distance between the two lifting plates 31 gradually increases in the vertical upward direction. The setting of the inclined surface 311 can facilitate the cooperation between the pressing block 2 and the lifting plate 31, and the setting of the inclined surface 311 can facilitate the gap between the pressing block 2 and the lifting plate 31 to leak out, which is convenient for the subsequent welding head 5 to weld the workpiece.

[0041] There are two horizontal driving members 4, which are arranged in the horizontal direction, and the arrangement direction of the two horizontal driving members 4 is perpendicular to the moving direction of the output part. Specifically, the device has four lifting cylinders 32, and the four lifting cylinders 32 are arranged in a square shape, which can limit the pressing block 2 within the square frame enclosed by the four lifting cylinders 32, further limiting the position of the pressing block 2.

[0042] The lithium battery water-cooling plate welding equipment also includes a picking device (not shown in the figure), which is used to pick up and place the compression block 2. In order to prevent the compression block 2 from moving during the welding process, the weight of the compression block 2 needs to be very heavy. The setting of the picking device can realize automatic picking up and placing of the compression block 2 without manual handling, thereby reducing labor intensity.

[0043] The preferred embodiment of the present invention also provides a lithium battery water cooling plate welding method, using the lithium battery water cooling plate welding equipment of the above embodiment, the welding steps include:

[0044] S1, place the workpiece between the support 1 and the pressing block 2, the pressing block 2 is 40kg, so that the workpiece is freely pressed flat on the support 1 by the pressing block 2, which is convenient for welding the workpiece;

[0045] S2. The two lifting drive members 3 are started, so that the two lifting plates 31 are lowered and both abut against the edges of the workpiece, and the lifting plates 31 press down on both sides of the workpiece so that the workpiece is tightly attached to each other. Specifically, the lifting piston rod 322 is retracted, and the first ring piece 323 and the second ring piece 324 clamp the first limit block 33 and the second limit block 34 and move downward, thereby driving the lifting plates 31 to move downward and press the workpiece placed on the support platform 1;

[0046] S3, the two output parts are respectively in contact with the pressing block 2 in two opposite directions in the horizontal direction, so that the pressing block 2 is located at the center of the workpiece, and the part of the workpiece to be welded is located between the lifting plate 31 and the pressing block 2, and then the two output parts are separated from the pressing block, so that the pressing block 2 is located at the center of the workpiece, and the horizontal driving member 4 is prevented from blocking the welding head 5. Specifically, the horizontal piston rod 412 drives the abutment plate 414 to move in the direction close to the pressing block 2, and at the same time the slide plate 415 slides relative to the horizontal cylinder body 411, and the four abutment plates 414 push the pressing block 2 in two opposite directions in the horizontal direction, so that the pressing block 2 can be located at the specified position;

[0047] S31, the moving trajectory of the welding head 5 during the simulation welding moves along the to-be-welded part of the workpiece, and checks whether the moving trajectory of the welding head 5 coincides with the to-be-welded part of the workpiece. Specifically, the welding head 5 selects to use a 200MOPA laser, starts the laser, turns on the enable and computer, reopens the welding software, finds the laser focal length so that the focal length is just above the to-be-welded part of the workpiece, adjusts the welding power parameters, adjusts the power to 35%, the frequency to 100HZ, the pulse to 100NS, and the speed to 150MM / S, adjusts the movement trajectory of the welding head 5 in the X-axis direction and the Y-axis direction so that the welding head 5 walks around the workpiece once, clicks the return position after positioning, and returns the welding head 5 to the initial position, and clicks the mold processing to check whether the movement trajectory of the welding head 5 coincides with the to-be-welded part of the workpiece, and simulates the welding trajectory in advance in actual welding to ensure the accuracy of subsequent welding;

[0048] S4, the welding head 5 is aligned between the lifting plate 31 and the pressing block 2, and moves along the to-be-welded portion of the workpiece to perform welding. Specifically, the simulation processing in step S31 is removed, and the welding head 5 moves along the to-be-welded portion of the workpiece to complete the welding. The to-be-welded portion of the workpiece surrounds the pressing block 2, and all welding work of the workpiece can be completed at one time;

[0049] S5. After welding is completed, the two lifting drive members 3 are started in reverse, so that the two lifting plates 31 rise, the pressing block 2 is removed, and the welded workpiece is taken out. Specifically, the lifting piston rod 322 extends to drive the lifting plate 31 to lift upward, the pick-and-place device removes the pressing block 2, and the workpiece is taken out to complete all steps.

[0050] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A lithium battery water cooling plate welding device, characterized in that: include: A support platform, the support platform is used to place the workpiece; A pressing block, the pressing block is located above the support platform and is used to press the center of the workpiece; Two lifting plates are arranged opposite to each other, and both of the lifting plates are located above the support platform; A lifting drive member, the lifting drive member is used to drive the lifting plate to lift and lower, so that the lifting plate abuts against or separates from the edge of the workpiece; A horizontal driving member, wherein the horizontal driving member comprises two output parts, the two output parts are respectively mounted on the two lifting plates, and the two output parts both move in the horizontal direction and in opposite directions, so that the two output parts abut against or separate from the pressing block in two opposite directions in the horizontal direction; A welding head is used for welding workpieces.

2. The lithium battery water cooling plate welding equipment according to claim 1, characterized in that: The lifting drive component includes two lifting cylinders, and the two lifting plates are respectively installed on the two lifting cylinders; a first limit block and a second limit block are arranged below the lifting plate, and the first limit block and the second limit block are arranged opposite to each other, and a limiting part is arranged on the inner side of the first limit block and the second limit block and near their lower ends; the lifting cylinder includes a lifting cylinder body and a lifting piston rod, one end of the lifting piston rod is slidably connected to the lifting cylinder body, and the other end is connected to a first ring plate, and the first ring plate abuts against the upper surfaces of the two limit plates.

3. The lithium battery water cooling plate welding equipment according to claim 2, characterized in that: The lifting piston rod is also connected to a second ring piece, the second ring piece is in contact with the lower surfaces of the two limiting parts, and the two limiting parts are clamped between the first ring piece and the second ring piece.

4. The lithium battery water cooling plate welding equipment according to claim 1, characterized in that: The horizontal driving component includes two slide cylinders, and the two slide cylinders are respectively installed on the two lifting plates; the slide cylinder includes a horizontal cylinder body, a horizontal piston rod, and a horizontal slide. One end of the horizontal piston rod is slidably connected to the horizontal cylinder body, and the other end is fixedly connected to the horizontal slide. The horizontal slide is slidably connected to the horizontal cylinder body, and the horizontal slide is used to abut or separate from the pressure block.

5. The lithium battery water cooling plate welding equipment according to claim 1, characterized in that: The inner sides of the two lifting plates are both arranged as inclined surfaces, and the distance between the two lifting plates gradually increases in the vertical upward direction.

6. The lithium battery water cooling plate welding equipment according to claim 1, characterized in that: There are two horizontal driving members, which are arranged in a horizontal direction, and their arrangement directions are perpendicular to the moving direction of the output part.

7. The lithium battery water cooling plate welding equipment according to claim 1, characterized in that: It also includes a taking device, which is used to take and place the pressing block.

8. A lithium battery water cooling plate welding method, characterized in that: The lithium battery water cooling plate welding equipment according to any one of claims 1 to 7 is used, and the welding steps include: S1, placing the workpiece between the support platform and the pressing block; S2, the two lifting driving members are started, so that the two lifting plates descend and abut against the edges of the workpiece; S3, the two output parts are respectively in contact with the pressing block in two opposite directions in the horizontal direction, so that the pressing block is located at the center of the workpiece, and the part to be welded of the workpiece is located between the lifting plate and the pressing block, and then the two output parts are separated from the pressing block; S4, the welding head is aligned between the lifting plate and the pressing block, and moves along the to-be-welded portion of the workpiece to perform welding; S5. After welding is completed, the two lifting driving members are started in reverse, so that the two lifting plates rise, the pressing blocks are removed, and the welded workpiece is taken out.

9. The lithium battery water cooling plate welding method according to claim 8, characterized in that: After step S3 and before step S4, The method comprises the following steps: S31, the moving track of the welding head during simulation welding moves along the part to be welded of the workpiece, and checks whether the moving track of the welding head coincides with the part to be welded of the workpiece.

10. The lithium battery water cooling plate welding method according to claim 8, characterized in that: In step S4, the portion of the workpiece to be welded is surrounded by the pressing block.

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