Guiding type battery precision spot welding device

Abstract

The utility model relates to the technical field of battery welding, and discloses a guide type battery precision spot welding device which comprises a processing platform, a movable base plate, a guide plate and a guide plate. The spot welding placement assembly comprises a placement base, a placement base plate is arranged at the bottom in the placement base, a plurality of placement grooves are evenly formed in the placement base plate at equal intervals, a first movable limiting strip is movably arranged on the placement base, a movable groove is formed in one side of the first movable limiting strip, and a second movable limiting strip is movably arranged in the movable groove. According to the guiding type battery precise spot welding device, a plurality of batteries are placed in the placing grooves in the placing base plate, an electromagnet is powered off to be separated from a fixed metal strip, a second movable limiting strip is rotated out of a movable groove with a pair of fixed columns as the axis, and a first movable limiting strip and the second movable limiting strip are moved; and the outer side walls of the first movable limiting strip and the second movable limiting strip are attached to the outer side walls of the batteries, so that the batteries are limited and fixed.

Description

Technical Field

[0001] This utility model relates to the field of battery welding technology, and in particular to a guided precision spot welding device for batteries. Background Technology

[0002] A battery pack refers to an assembly structure that combines individual batteries into multiple battery groups. Most cylindrical lithium battery packs on the market use spot welding machines to quickly spot weld multiple cylindrical batteries together using nickel sheets.

[0003] Chinese Patent CN223056885U discloses a spot welding device for lithium battery assembly and processing, including a support platform. Two first movable plates are slidably connected to the upper surface of the support platform, and two second movable plates are also slidably connected to the upper surface of the support platform. Limiting grooves are formed through the side surfaces of the two first movable plates, and the two second movable plates slide relative to the inner walls of the limiting grooves. Nickel strip pressure plates are slidably connected to the side surfaces of the first movable plates. A first portal frame is fixedly connected to the upper surface of the support platform, and a second portal frame is slidably connected to the inner top surface of the first portal frame. A slider is slidably connected to the inner top surface of the second portal frame. The slider is slidably connected to a welding box via two hydraulic rods, and two spot welding heads are fixedly connected to the lower surface of the welding box. This application facilitates the stable fixing of different numbers of lithium batteries, thereby improving spot welding efficiency and quality.

[0004] Regarding the above and existing related technologies, the inventors believe that the following defects often exist: The above device can be used to stably fix and limit the surrounding area of ​​different numbers of lithium battery packs by sliding two first moving plates relative to each other and making two second moving plates slide relative to each other. However, some battery welding requires workers to arrange the batteries into the required number and combination according to production needs before spot welding can be performed. The above device cannot specifically fix and limit the surrounding area. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing technology has the disadvantage of not being able to fix and limit the position of several groups of batteries. To this end, we propose a guided precision spot welding device for batteries.

[0006] To achieve the above objectives, this application adopts the following technical solution: a guided precision spot welding device for batteries, comprising: a processing platform, a movable base plate disposed above the processing platform, a spot welding placement assembly disposed above the movable base plate, a clamping assembly disposed on the movable base plate, a mounting frame fixedly mounted on the outer wall of the processing platform, a driving assembly disposed below the processing platform, and a movable welding assembly disposed inside the mounting frame.

[0007] The spot welding mounting assembly includes a mounting base, a mounting substrate is provided at the bottom of the mounting base, a plurality of mounting grooves are evenly spaced on the mounting substrate, a first movable limiting strip is movably mounted on the mounting base, a movable groove is provided on one side of the first movable limiting strip, a second movable limiting strip is movably mounted in the movable groove, and a limiting fixing component is provided on the mounting base.

[0008] Preferably, a pair of limiting grooves are provided in the movable groove, and a pair of fixing posts are symmetrically fixedly installed on the top and bottom surfaces of one end of the second movable limiting strip. The fixing posts are movably set in the limiting grooves, and a fixing magnet is fixedly installed on the top surface of the base. The second movable limiting strip is made of metal, and the height of the top surface of the fixing magnet is the same as the height of the bottom surface of the second movable limiting strip. When the fixing magnet is in contact with the second movable limiting strip, they attract each other.

[0009] Preferably, a pair of limiting grooves are provided in the movable groove, and a pair of fixing columns are symmetrically fixedly installed on the top and bottom surfaces of one end of the second movable limiting strip. The fixing columns are movably set in the limiting groove, and a fixing magnet is fixedly installed on the top surface of the base. The second movable limiting strip is made of metal, and the fixing magnet attracts the second movable limiting strip when they are in contact.

[0010] Preferably, the clamping assembly includes a pair of fixed base plates, which are fixedly mounted on the top surface of a movable base plate. A movable clamping plate is movably disposed between the pair of fixed base plates. A rubber pad is fixedly mounted on one side of the movable clamping plate, and a plurality of fixed rods are fixedly mounted on the other side of the movable clamping plate. Each of the plurality of fixed rods slides through a fixed base plate, and a fixed handle is fixedly mounted on the other end of each of the plurality of fixed rods. Each of the plurality of fixed rods is fitted with a compression spring, and the plurality of compression springs are elastically connected between the fixed base plate and the movable clamping plate.

[0011] Preferably, the mounting base is disposed between a fixed base plate and a movable clamping plate, the outer wall of the mounting base is in contact with the inner wall of a fixed base plate away from the fixing rod, and the outer wall of the rubber pad is in contact with the outer wall of the fixed base plate.

[0012] Preferably, the drive assembly includes a pair of fixed mounting blocks, which are fixedly mounted on the bottom surface of the processing platform. A first threaded rod is rotatably mounted between the pair of fixed mounting blocks. A plurality of first threaded sleeves are threaded onto the first threaded rod. A plurality of fixed connecting blocks are fixedly mounted on the top of the plurality of first threaded sleeves. A plurality of through slots are provided on the processing platform. A plurality of fixed connecting blocks are slidably disposed in the through slots. A plurality of fixed connecting blocks are fixedly mounted on the bottom surface of the movable base plate.

[0013] Preferably, a first forward and reverse motor is fixedly installed on the outer wall of a fixed mounting block, the output shaft of the first forward and reverse motor is coaxially fixedly connected to a first threaded rod, a plurality of first limiting rods are fixedly installed between a pair of fixed mounting blocks, a plurality of first threaded sleeves are slidably sleeved on the plurality of first limiting rods, and a plurality of rotating balls are equidistantly and uniformly rotatably installed on the bottom surface of the movable base plate, the outer walls of the plurality of rotating balls are in contact with the top surface of the processing platform.

[0014] Preferably, the movable welding assembly includes a second threaded rod, which is rotatably mounted on the inner side wall of the mounting frame. A second threaded sleeve block is threaded onto the second threaded rod. Several electric telescopic rods are fixedly mounted on the bottom end of the second threaded sleeve block. A welding box is fixedly mounted on the movable end of the electric telescopic rod. Several welding heads are fixedly connected to the bottom surface of the welding box. A second limiting rod is fixedly mounted inside the mounting frame. The second threaded rod is slidably mounted on the second limiting rod. A second forward and reverse motor is fixedly mounted on the outer side wall of the mounting frame. The output shaft of the second forward and reverse motor is coaxially fixedly connected to the second threaded rod.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] In this invention, several batteries are placed in the mounting groove on the mounting base plate. The electromagnet is de-energized and separated from the fixed metal strip. The second movable limiting strip is rotated out of the movable groove around a pair of fixed posts. The first and second movable limiting strips are moved so that the outer walls of the first and second movable limiting strips are in contact with the outer walls of the batteries, thereby limiting and fixing the batteries. When the electromagnet is energized, it attracts the fixed metal strip, and the fixed magnet is in contact with and attracted to the second movable limiting strip, thus fixing the first and second movable limiting strips.

[0017] In this utility model, pulling the fixed handle outward causes the fixed handle to pull the movable clamping plate through several fixed rods, which in turn compresses several compression springs, placing the mounting base between a fixed base plate and the movable clamping plate. Releasing the fixed handle causes the outer wall of the mounting base to fit against the inner wall of a fixed base plate and the outer wall of the rubber pad. Attached Figure Description

[0018] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0021] Figure 3 This is a top view of the spot welding mounting assembly of this utility model;

[0022] Figure 4 This is an exploded structural diagram of the spot welding mounting assembly of this utility model;

[0023] Figure 5 For the present utility model Figure 4 Enlarged view of the structure at point A;

[0024] Figure 6 This is a side view of the present invention.

[0025] Figure 7 This is a bottom view of the structure of this utility model;

[0026] Figure 8 This is a schematic diagram of the drive component structure of this utility model;

[0027] Figure 9 This is a schematic diagram of the structure of the movable welding assembly of this utility model.

[0028] Legend: 1. Processing platform; 2. Movable base plate; 3. Spot welding mounting assembly; 31. Mounting base; 32. Mounting base plate; 33. Mounting groove; 34. First movable limiting bar; 35. Movable groove; 36. Second movable limiting bar; 37. Limiting and fixing assembly; 371. L-shaped fixing block; 372. Sliding groove; 373. Electromagnet; 374. Fixing metal strip; 375. Limiting groove; 376. Fixing post; 377. Fixing magnet; 4. Clamping assembly; 41. Fixing base plate; 42. Movable clamping plate; 43. Rubber 44. Pad; 45. Fixing rod; 46. Compression spring; 5. Fixing handle; 67. Mounting bracket; 68. Drive assembly; 69. Fixing mounting block; 60. First threaded rod; 61. First threaded sleeve block; 62. Fixing connecting block; 63. Through slot; 64. First forward / reverse motor; 65. First limiting rod; 66. Rotating ball; 77. Movable welding assembly; 78. Second threaded rod; 79. Second threaded sleeve block; 70. Electric telescopic rod; 71. Welding box; 72. Welding head; 73. Second limiting rod; 74. Second forward / reverse motor. Detailed Implementation

[0029] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0030] Reference Figure 1-6As shown, this utility model provides a technical solution: a guided precision spot welding device for batteries, including: a processing platform 1, a movable base plate 2 is arranged above the processing platform 1, a spot welding placement assembly 3 is arranged above the movable base plate 2, a clamping assembly 4 is arranged on the movable base plate 2, a mounting frame 5 is fixedly installed on the outer wall of the processing platform 1, a driving assembly 6 is arranged below the processing platform 1, and a movable electric welding assembly 7 is arranged inside the mounting frame 5.

[0031] The spot welding mounting assembly 3 includes a mounting base 31, a mounting substrate 32 is provided at the bottom of the mounting base 31, a plurality of mounting grooves 33 are evenly spaced on the mounting substrate 32, a first movable limiting strip 34 is movably provided on the mounting base 31, a movable groove 35 is provided on one side of the first movable limiting strip 34, a second movable limiting strip 36 is movably provided in the movable groove 35, and a limiting fixing assembly 37 is provided on the mounting base 31.

[0032] The limiting and fixing assembly 37 includes a pair of L-shaped fixing blocks 371. The vertical sections of the pair of L-shaped fixing blocks 371 are symmetrically fixed at both ends of the first movable limiting strip 34. The outer side wall of the mounting base 31 is symmetrically provided with sliding grooves 372. The horizontal sections of the L-shaped fixing blocks 371 are movably disposed in the sliding grooves 372. An electromagnet 373 is fixedly installed on the outer side wall of the first movable limiting strip 34. A fixing metal strip 374 is embedded in the top surface of the mounting base 31. When the electromagnet 373 is energized, it attracts the fixing metal strip 374.

[0033] A pair of limiting grooves 375 are provided in the movable groove 35. A pair of fixing posts 376 are symmetrically fixedly installed on the top and bottom surfaces of one end of the second movable limiting strip 36. The fixing posts 376 are movably set in the limiting grooves 375. A fixing magnet 377 is fixedly installed on the top surface of the mounting base 31. The second movable limiting strip 36 is made of metal. The height of the top surface of the fixing magnet 377 is the same as the height of the bottom surface of the second movable limiting strip 36. When the fixing magnet 377 is in contact with the second movable limiting strip 36, they attract each other.

[0034] Reference Figure 1-6 As shown, in this embodiment: several batteries are placed into the mounting slots 33 on the mounting substrate 32. The electromagnet 373 is de-energized and separated from the fixed metal strip 374. The second movable limiting strip 36 is rotated out of the movable slot 35 about a pair of fixed posts 376. The first movable limiting strip 34 and the second movable limiting strip 36 are moved so that the outer walls of the first movable limiting strip 34 and the second movable limiting strip 36 are in contact with the outer walls of the batteries, thereby limiting and fixing the several batteries. The electromagnet 373 is energized and attracts the fixed metal strip 374. The fixed magnet 377 is in contact with and attracts the second movable limiting strip 36, thereby fixing the first movable limiting strip 34 and the second movable limiting strip 36.

[0035] Reference Figure 1-3As shown, this utility model provides a technical solution: the clamping assembly 4 includes a pair of fixed base plates 41, the pair of fixed base plates 41 are fixedly installed on the top surface of the movable base plate 2, a movable clamping plate 42 is movably arranged between the pair of fixed base plates 41, a rubber pad 43 is fixedly installed on one side of the movable clamping plate 42, and a plurality of fixing rods 44 are fixedly installed on the other side of the movable clamping plate 42. The plurality of fixing rods 44 slide through a fixed base plate 41, and a fixing handle 46 is fixedly installed at the other end of the plurality of fixing rods 44. A compression spring 45 is sleeved on the plurality of fixing rods 44, and the plurality of compression springs 45 are elastically connected between the fixed base plate 41 and the movable clamping plate 42.

[0036] The mounting base 31 is disposed between a fixed base plate 41 and a movable clamping plate 42. The outer wall of the mounting base 31 is in contact with the inner wall of a fixed base plate 41 away from the fixed rod 44, and the outer wall of the rubber pad 43 is in contact with the outer wall of the fixed base plate 41.

[0037] Reference Figure 1 As shown in Figure 3, in this embodiment: the fixed handle 46 is pulled outward, and the fixed handle 46 pulls the movable clamping plate 42 through several fixed rods 44, so that the movable clamping plate 42 compresses several compression springs 45, and the mounting base 31 is placed between a fixed base plate 41 and the movable clamping plate 42. The fixed handle 46 is released, so that the outer wall of the mounting base 31 is in contact with the inner wall of a fixed base plate 41 and the outer wall of the rubber pad 43, thereby clamping and fixing the mounting base 31.

[0038] Reference Figure 6-8 As shown, this utility model provides a technical solution: the drive component 6 includes a pair of fixed mounting blocks 61, the pair of fixed mounting blocks 61 are fixedly mounted on the bottom surface of the processing platform 1, a first threaded rod 62 is rotatably mounted between the pair of fixed mounting blocks 61, a plurality of first threaded sleeve blocks 63 are threadedly sleeved on the first threaded rod 62, a plurality of fixed connecting blocks 64 are fixedly mounted on the top of the plurality of first threaded sleeve blocks 63, a plurality of through slots 65 are opened on the processing platform 1, the plurality of fixed connecting blocks 64 are slidably disposed in the through slots 65, and the plurality of fixed connecting blocks 64 are fixedly mounted on the bottom surface of the movable base plate 2.

[0039] A first forward and reverse motor 66 is fixedly installed on the outer wall of a fixed mounting block 61. The output shaft of the first forward and reverse motor 66 is coaxially fixedly connected to the first threaded rod 62. A number of first limiting rods 67 are fixedly installed between a pair of fixed mounting blocks 61. A number of first threaded sleeves 63 are slidably sleeved on the number of first limiting rods 67. A number of rotating balls 68 are equidistantly and evenly rotatably installed on the bottom surface of the movable base plate 2. The outer walls of the number of rotating balls 68 are in contact with the top surface of the processing platform 1.

[0040] Reference Figure 6-8As shown, in this embodiment: the first forward and reverse motor 66 is started, and the first forward and reverse motor 66 drives the first threaded rod 62 to rotate. As the first threaded rod 62 rotates, a plurality of first threaded sleeve blocks 63 move synchronously. The first threaded sleeve blocks 63 drive the movable base plate 2 to move through the fixed connecting block 64. When the fixed connecting block 64 moves, the fixed connecting block 64 moves in the through groove 65. The movable base plate 2 drives the mounting base 31 to move synchronously. When the movable base plate 2 moves, a plurality of rotating balls 68 rotate to ensure the stability of the movable base plate 2 during movement. When the first threaded sleeve blocks 63 move, the first threaded sleeve blocks 63 slide on the first limiting rod 63 to ensure the stability of the first threaded sleeve blocks 63 during movement.

[0041] Reference Figure 1-2 As shown in Figure 9, this utility model provides a technical solution: the movable welding assembly 7 includes a second threaded rod 71, which is rotatably mounted on the inner side wall of the mounting frame 5. A second threaded sleeve block 72 is threadedly fitted on the second threaded rod 71. A plurality of electric telescopic rods 73 are fixedly installed at the bottom end of the second threaded sleeve block 72. A welding box 74 is fixedly installed at the movable end of the electric telescopic rod 73. A plurality of welding heads 75 are fixedly connected to the bottom surface of the welding box 74. A second limiting rod 76 is fixedly installed inside the mounting frame 5. The second threaded rod 71 is slidably fitted on the second limiting rod 76. A second forward and reverse motor 77 is fixedly installed on the outer side wall of the mounting frame 5. The output shaft of the second forward and reverse motor 77 is coaxially fixedly connected to the second threaded rod 71.

[0042] Reference Figure 1-2 As shown in Figure 9, in this embodiment: the second forward and reverse motor 77 is started, and the second forward and reverse motor 77 drives the second threaded rod 71 to rotate. As the second threaded rod 71 rotates, the second threaded sleeve block 72 moves. The second threaded sleeve block 72 drives the electric telescopic rod 73 to move. After the electric telescopic rod 73 moves to the appropriate position, the electric telescopic rod 73 pushes the welding box 74 and the welding head 75 to move, so that the welding head 75 performs spot welding on the battery. When the second threaded sleeve block 72 moves, the second threaded sleeve block 72 slides on several second limit rods 76 to limit the movement of the second threaded sleeve block 72.

[0043] Working principle: Pulling the fixed handle 46 outward causes the fixed handle 46 to pull the movable clamping plate 42 via several fixed rods 44. This causes the movable clamping plate 42 to compress several compression springs 45, placing the mounting base 31 between a fixed base plate 41 and the movable clamping plate 42. Releasing the fixed handle 46 causes the outer wall of the mounting base 31 to fit against the inner wall of a fixed base plate 41 and the outer wall of the rubber pad 43, thus clamping and fixing the mounting base 31. Several batteries are then placed into the mounting slots 33 on the mounting base plate 32. Electromagnet 3... 73 is de-energized and separated from the fixed metal strip 374. The second movable limiting strip 36 is rotated out of the movable groove 35 around a pair of fixed posts 376. The first movable limiting strip 34 and the second movable limiting strip 36 are moved so that the outer walls of the first movable limiting strip 34 and the second movable limiting strip 36 are in contact with the outer walls of the batteries, thus limiting and fixing several batteries. The electromagnet 373 is energized and attracts the fixed metal strip 374. The fixed magnet 377 is in contact with the second movable limiting strip 36 and attracts it, thus fixing the first movable limiting strip 34 and the second movable limiting strip 36.

[0044] The first forward and reverse motor 66 is started, which drives the first threaded rod 62 to rotate. As the first threaded rod 62 rotates, several first threaded sleeve blocks 63 move synchronously. The first threaded sleeve blocks 63 drive the movable base plate 2 to move through the fixed connecting block 64. The movable base plate 2 drives the mounting base 31 to move synchronously. The second forward and reverse motor 77 is started, which drives the second threaded rod 71 to rotate. As the second threaded rod 71 rotates, the second threaded sleeve blocks 72 move. The second threaded sleeve blocks 72 drive the electric telescopic rod 73 to move. After the electric telescopic rod 73 moves to the appropriate position, the electric telescopic rod 73 pushes the welding box 74 and the welding head 75 to move, so that the welding head 75 performs spot welding on the battery.

[0045] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A guided battery precision spot welding device, characterized by, The system includes a processing platform: a movable base plate is provided above the processing platform, a spot welding mounting assembly is provided above the movable base plate, a clamping assembly is provided on the movable base plate, a mounting frame is fixedly installed on the outer wall of the processing platform, a driving assembly is provided below the processing platform, and a movable electric welding assembly is provided inside the mounting frame. The spot welding mounting assembly includes a mounting base, a mounting substrate is provided at the bottom of the mounting base, a plurality of mounting grooves are evenly spaced on the mounting substrate, a first movable limiting strip is movably disposed on the mounting base, a movable groove is provided on one side of the first movable limiting strip, a second movable limiting strip is movably disposed in the movable groove, and a limiting fixing assembly is provided on the mounting base.

2. The guided precision spot welding device for batteries according to claim 1, characterized in that: The limiting and fixing assembly includes a pair of L-shaped fixing blocks. The vertical sections of the pair of L-shaped fixing blocks are symmetrically fixed at both ends of the first movable limiting strip. The outer side wall of the mounting base is symmetrically provided with sliding grooves. The horizontal sections of the L-shaped fixing blocks are movably disposed in the sliding grooves. An electromagnet is fixedly installed on the outer side wall of the first movable limiting strip. A fixing metal strip is embedded in the top surface of the mounting base. When the electromagnet is energized, it attracts the fixing metal strip.

3. The guided precision spot welding device for batteries according to claim 1, characterized in that: A pair of limiting grooves are provided in the movable groove. A pair of fixing posts are symmetrically fixedly installed on the top and bottom surfaces of one end of the second movable limiting strip. The fixing posts are movably arranged in the limiting groove. A fixing magnet is fixedly installed on the top surface of the mounting base. The second movable limiting strip is made of metal. The height of the top surface of the fixing magnet is the same as the height of the bottom surface of the second movable limiting strip. The fixing magnet attracts the second movable limiting strip when they are in contact.

4. The guided precision spot welding device for batteries according to claim 1, characterized in that: The clamping assembly includes a pair of fixed base plates, which are fixedly mounted on the top surface of a movable base plate. A movable clamping plate is movably disposed between the pair of fixed base plates. A rubber pad is fixedly mounted on one side of the movable clamping plate, and a plurality of fixed rods are fixedly mounted on the other side of the movable clamping plate. Each of the plurality of fixed rods slides through a fixed base plate, and a fixed handle is fixedly mounted on the other end of each of the plurality of fixed rods. A compression spring is sleeved on each of the plurality of fixed rods, and the plurality of compression springs are elastically connected between the fixed base plate and the movable clamping plate.

5. The guided precision spot welding device for batteries according to claim 4, characterized in that: The mounting base is disposed between a fixed base plate and a movable clamping plate. The outer wall of the mounting base is in contact with the inner wall of a fixed base plate away from the fixed rod, and the outer wall of the rubber pad is in contact with the outer wall of the fixed base plate.

6. The guided precision spot welding device for batteries according to claim 1, characterized in that: The drive assembly includes a pair of fixed mounting blocks, which are fixedly mounted on the bottom surface of the processing platform. A first threaded rod is rotatably mounted between the pair of fixed mounting blocks. A plurality of first threaded sleeves are threaded onto the first threaded rod. A plurality of fixed connecting blocks are fixedly mounted on the top of the plurality of first threaded sleeves. A plurality of through slots are provided on the processing platform. The plurality of fixed connecting blocks are slidably disposed in the through slots. The plurality of fixed connecting blocks are fixedly mounted on the bottom surface of the movable base plate.

7. The guided precision spot welding device for batteries according to claim 6, characterized in that: A first forward and reverse motor is fixedly installed on the outer wall of one of the fixed mounting blocks. The output shaft of the first forward and reverse motor is coaxially fixedly connected to the first threaded rod. A plurality of first limiting rods are fixedly installed between a pair of fixed mounting blocks. A plurality of first threaded sleeves are slidably sleeved on the plurality of first limiting rods. A plurality of rotating balls are equidistantly and uniformly rotatably installed on the bottom surface of the movable base plate. The outer walls of the plurality of rotating balls are in contact with the top surface of the processing platform.

8. The guided precision spot welding device for batteries according to claim 1, characterized in that: The movable welding assembly includes a second threaded rod, which is rotatably mounted on the inner side wall of the mounting frame. A second threaded sleeve block is threaded onto the second threaded rod. Several electric telescopic rods are fixedly mounted on the bottom end of the second threaded sleeve block. A welding box is fixedly mounted on the movable end of the electric telescopic rod. Several welding heads are fixedly connected to the bottom surface of the welding box. A second limiting rod is fixedly mounted inside the mounting frame. The second threaded rod is slidably mounted on the second limiting rod. A second forward and reverse motor is fixedly mounted on the outer side wall of the mounting frame. The output shaft of the second forward and reverse motor is coaxially fixedly connected to the second threaded rod.

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