Lithium battery assembly spot welding device

Abstract

The utility model discloses a lithium battery assembly spot welding device, and relates to the technical field of lithium batteries. The lithium battery assembly spot welding device comprises a bottom plate, a placing frame is arranged on the bottom plate, moving frames are symmetrically arranged at the lower end of the interior of the placing frame, moving blocks are arranged on the moving frames, a moving groove is formed in the placing frame, a two-way lead screw is arranged in the moving groove, a second motor is arranged at one end of the two-way lead screw, and a first motor is arranged at the other end of the two-way lead screw. A bidirectional lead screw is arranged in the containing frame, the bidirectional lead screw is in threaded connection with the moving blocks, a limiting plate is arranged between the two moving frames and slides in the moving frames, a supporting plate is arranged on the containing frame, and a third motor is arranged on the supporting plate. Therefore, the placement space on the placement frame is adjusted to be suitable for assembling the lithium battery packs with different sizes, and the convenience of assembling the lithium battery packs with different sizes is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and specifically relates to a lithium battery assembly spot welding device. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the positive / negative electrode material and a non-aqueous electrolyte solution. Lithium batteries are usually produced individually, but the voltage or current provided by a single lithium battery cannot meet the power needs of our daily lives. In order to meet the power needs of various devices, multiple lithium batteries need to be connected in parallel or series to increase the current or voltage.

[0003] When connecting batteries in parallel or series, multiple lithium batteries need to be welded together using spot welding equipment and nickel alloy strips to assemble into a battery pack, thereby increasing the voltage or current provided to meet the power requirements of various devices.

[0004] The placement space of the mold used to place lithium batteries in the existing spot welding device is fixed, and it can only realize spot welding of battery packs of one size. When assembling battery packs of other sizes, molds of different sizes need to be replaced. However, in order to ensure the fixed placement of the battery during spot welding, the mold is fixedly connected to the spot welding device with multiple bolts, resulting in a long time to remove the mold from the spot welding device, and making molds of different sizes increases production costs. Utility Model Content

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a lithium battery assembly spot welding device that can overcome the above problems or at least partially solve the above problems.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a lithium battery assembly spot welding device, comprising a base plate, a placement frame is provided on the base plate, a moving frame is symmetrically provided at the lower end of the inner part of the placement frame, a moving block is provided on the moving frame, a moving groove is opened on the placement frame, a bidirectional screw rod is provided in the moving groove, a second motor is provided at one end of the bidirectional screw rod, the bidirectional screw rod is threadedly connected to the moving block, a limiting plate is provided between the two moving frames, the limiting plate slides in the moving frame, a support plate is provided on the placement frame, a third motor is provided on the support plate, the output end of the second motor is fixedly connected to the first screw rod, and the first screw rod is threadedly connected to the limiting plate.

[0007] Furthermore, a top plate is connected to the top of the bottom plate via a connecting rod, a spot welding assembly is provided at the lower end of the top plate, an electric hydraulic rod is provided at the upper end of the top plate, and a telescopic end of the electric hydraulic rod is fixedly connected to the spot welding assembly.

[0008] In order to facilitate the fixing of the nickel alloy strip, a cover plate is further provided at the upper end of the placement frame, and a plurality of spot welding holes are opened on the cover plate.

[0009] In order to facilitate the installation and disassembly of the cover, the cover is further symmetrically provided with an insert block, the placement frame is provided with a slot for cooperating with the insert block, a limit block is slidingly provided in the slot, the limit block is connected to the placement frame through a tensioning spring, the insert block is provided with a slot for cooperating with the limit block, the limit block is provided with a moving rod, and the moving rod extends out of the placement frame.

[0010] In order to prevent debris from entering the slot, a baffle is further provided on one side of the moving rod.

[0011] In order to facilitate the flipping of lithium batteries that need spot welding, further, support blocks are symmetrically arranged on the bottom plate, and the support blocks are rotatably connected to the placement frame. A first motor is provided on one of the support blocks, and the output end of the first motor is fixedly connected to the placement frame. A plurality of spot welding holes are provided at the lower end of the interior of the placement frame, and a rotation groove is provided on the bottom plate.

[0012] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: the present invention adjusts the placement space on the placement frame to be suitable for the assembly of lithium battery packs of different sizes by moving the movable frame within the placement frame and the limiting plate within the movable frame, thereby effectively improving the convenience when assembling lithium battery packs of different sizes.

[0013] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In the attached figure:

[0015] Figure 1 This is a schematic diagram of the structure of a lithium battery assembly spot welding device proposed in this utility model Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the rear structure of a lithium battery assembly spot welding device proposed in this utility model Figure 2 ;

[0017] Figure 3 This is a partial cross-sectional view of a lithium battery assembly spot welding device proposed by the present invention;

[0018] Figure 4 This is a cross-sectional view of a lithium battery assembly spot welding device proposed by the present utility model;

[0019] Figure 5 A lithium battery assembly spot welding device proposed by this utility model Figure 3A magnified schematic diagram of point A in the middle;

[0020] Figure 6 A lithium battery assembly spot welding device proposed by this utility model Figure 4 A magnified schematic diagram of B.

[0021] In the figure: 1. Bottom plate; 101. Top plate; 102. Support block; 103. Electric hydraulic rod; 104. First motor; 2. Placement frame; 201. Support plate; 202. Limit block; 203. Tensioning spring; 204. Moving rod; 205. Baffle; 206. Moving groove; 207. Slot; 3. Moving frame; 4. Limit plate; 5. Cover plate; 501. Insert block; 6. Second motor; 601. Bidirectional screw; 602. Moving block; 7. Third motor; 701. First screw; 8. Spot welding assembly. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0023] Example 1:

[0024] Reference Figures 1-6 A lithium battery assembly spot welding device includes a base plate 1, a placement frame 2 is provided on the base plate 1, a moving frame 3 is symmetrically provided on the lower end of the placement frame 2, a moving block 602 is provided on the moving frame 3, a moving groove 206 is opened on the placement frame 2, a bidirectional screw rod 601 is provided in the moving groove 206, a second motor 6 is provided at one end of the bidirectional screw rod 601, the bidirectional screw rod 601 is threadedly connected to the moving block 602, a limit plate 4 is provided between the two moving frames 3, the limit plate 4 slides in the moving frame 3, a support plate 201 is provided on the placement frame 2, and a third motor 7 is provided on the support plate 201. The output end of the second motor 6 is fixedly connected to the first screw rod 701, and the first screw rod 701 is threadedly connected to the limit plate 4.

[0025] The top plate 101 is connected to the bottom plate 1 through a connecting rod. The lower end of the top plate 101 is provided with a spot welding assembly 8. The upper end of the top plate 101 is provided with an electric hydraulic rod 103. The telescopic end of the electric hydraulic rod 103 is fixedly connected to the spot welding assembly 8.

[0026] When lithium batteries need to be spot-welded to form a lithium battery pack, a single lithium battery is placed in the space surrounded by the placement frame 2, the movable frame 3, and the limit plate 4. When multiple lithium batteries are fully placed, a nickel alloy bar is placed on the lithium battery, and the electric hydraulic rod 103 is extended and retracted to move the spot welding assembly 8. The spot welding head of the spot welding assembly 8 welds the nickel alloy bar to the lithium battery. After the spot welding head spot welds a single lithium battery to the nickel alloy bar, the spot welding head moves on the spot welding assembly 8 to adjust the position of the spot welding head to spot weld other lithium batteries. When all lithium batteries are spot welded to the nickel alloy bar, the welding of one side of the lithium battery is completed. At this time, the lithium battery is taken out and turned over, and the side that has not been welded is placed on top and placed in the placement frame 2 again. Another nickel alloy bar is placed on the lithium battery, and the electric hydraulic rod 103 and the spot welding assembly 8 are used to weld the other sides of multiple lithium batteries to the nickel alloy bar to realize the assembly of the lithium battery pack.

[0027] When it is necessary to assemble lithium battery packs of different sizes, the second motor 6 drives the moving block 602 to move through the bidirectional screw rod 601. When the moving block 602 moves, it moves the moving frame 3 with it, thereby changing the width of the lithium battery placement space. When the moving frame 3 moves to the appropriate position, the second motor 6 stops working, and the third motor 7 moves the limit plate 4 through the first screw rod 701. The limit plate 4 moves in the moving frame 3 to change the length of the lithium battery placement space. When the limit plate 4 moves to the appropriate position, the third motor 7 stops working. At this time, the placement space surrounded by the placement frame 2, the moving frame 3, and the limit plate 4 is the placement space for the lithium battery pack of the size that needs to be assembled. The placement space can be freely adjusted to assemble lithium battery packs of different sizes without replacing the placement frame 2, which effectively improves the convenience when assembling lithium battery packs of different sizes.

[0028] By moving the movable frame 3 within the placement frame 2 and the limiting plate 4 within the movable frame 3 , the placement space on the placement frame 2 is adjusted to be suitable for the assembly of lithium battery packs of different sizes, thereby effectively improving the convenience of assembling lithium battery packs of different sizes.

[0029] Example 2:

[0030] Reference Figures 1-6 , a lithium battery assembly spot welding device, which is basically the same as Example 1, furthermore, a cover plate 5 is provided at the upper end of the placement frame 2, and a plurality of spot welding holes are opened on the cover plate 5.

[0031] An insert block 501 is symmetrically provided at the lower end of the cover 5, and a slot 207 is provided on the placement frame 2 for cooperating with the insert block 501. A limit block 202 is slidably provided in the slot 207. The limit block 202 is connected to the placement frame 2 through a tensioning spring 203. A slot is provided on the insert block 501 for cooperating with the limit block 202. A moving rod 204 is provided on the limit block 202, and the moving rod 204 extends out of the placement frame 2.

[0032] A nickel alloy bar is placed on the upper end of the lithium battery and the cover plate 5 is covered. The insert block 501 on the cover plate 5 enters the slot 207 and contacts the inclined surface of the limit block 202. The insert block 501 continues to move to push the limit block 202 to move. When the slot on the insert block 501 corresponds to the limit block 202, the limit block 202 enters the slot under the action of the tensioning spring 203 to limit the cover plate 5. At this time, the cover plate 5 fixes the nickel alloy bar to prevent the movement of the nickel alloy bar from affecting the assembly of the lithium battery. The spot welding head of the spot welding assembly 8 spot welds the nickel alloy bar to the lithium battery through the spot welding hole to realize the assembly of the battery pack. When the cover plate 5 needs to be removed, the moving rod 204 is moved. The moving rod 204 moves with the limit block 202. The limit block 202 leaves the slot of the insert block 501. The insert block 501 loses the limit of the limit block 202, and the cover plate 5 can be removed and the lithium battery can be taken out.

[0033] A baffle 205 is provided on one side of the moving rod 204 to block the slot 207 on one side of the moving rod 204 to prevent debris from entering the slot 207 and affecting the movement of the limit block 202 .

[0034] Support blocks 102 are symmetrically arranged on the base plate 1, and the support blocks 102 are rotatably connected to the placement frame 2. A first motor 104 is arranged on one of the support blocks 102, and the output end of the first motor 104 is fixedly connected to the placement frame 2. A plurality of spot welding holes are provided at the inner lower end of the placement frame 2, and a rotation groove is provided on the base plate 1. Before the lithium battery is placed, a nickel alloy bar is placed at the inner lower end of the placement frame 2. When the spot welding of the nickel alloy bar at the upper end of the lithium battery is completed, the first motor 104 works to rotate the placement frame 2 to flip the placement frame 2, and the other end of the lithium battery is placed at the spot welding position of the spot welding assembly 8. It can be directly turned over for spot welding, and there is no need to take out the lithium battery and turn it over for spot welding, which effectively improves the spot welding efficiency. After the spot welding is completed on both sides, the first motor 104 works to reverse the placement frame 2 again. At this time, the cover plate 5 can be removed to take out the spot-welded lithium battery pack.

[0035] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention.

Claims

1. A lithium battery assembly spot welding device, characterized in that: The invention comprises a bottom plate (1), a placing frame (2) is provided on the bottom plate (1), a moving frame (3) is symmetrically provided at the lower end of the placing frame (2), a moving block (602) is provided on the moving frame (3), a moving groove (206) is provided on the placing frame (2), a bidirectional screw rod (601) is provided in the moving groove (206), a second motor (6) is provided at one end of the bidirectional screw rod (601), the bidirectional screw rod (601) is threadedly connected to the moving block (602), a limiting plate (4) is provided between the two moving frames (3), the limiting plate (4) slides in the moving frame (3), a supporting plate (201) is provided on the placing frame (2), a third motor (7) is provided on the supporting plate (201), an output end of the second motor (6) is fixedly connected to a first screw rod (701), and the first screw rod (701) is threadedly connected to the limiting plate (4).

2. A lithium battery assembly spot welding device according to claim 1, characterized in that: The top of the bottom plate (1) is connected to a top plate (101) via a connecting rod, a spot welding assembly (8) is provided at the lower end of the top plate (101), an electric hydraulic rod (103) is provided at the upper end of the top plate (101), and the telescopic end of the electric hydraulic rod (103) is fixedly connected to the spot welding assembly (8).

3. A lithium battery assembly spot welding device according to claim 1, characterized in that: A cover plate (5) is provided at the upper end of the placement frame (2), and a plurality of spot welding holes are opened on the cover plate (5).

4. A lithium battery assembly spot welding device according to claim 3, characterized in that: The lower end of the cover plate (5) is symmetrically provided with an inserting block (501); the placement frame (2) is provided with a slot (207) for cooperating with the inserting block (501); a limit block (202) is slidably provided in the slot (207); the limit block (202) is connected to the placement frame (2) via a tensioning spring (203); the inserting block (501) is provided with a slot for cooperating with the limit block (202); the limit block (202) is provided with a moving rod (204); and the moving rod (204) extends out of the placement frame (2).

5. A lithium battery assembly spot welding device according to claim 4, characterized in that: A baffle (205) is provided on one side of the moving rod (204).

6. A lithium battery assembly spot welding device according to claim 1, characterized in that: Support blocks (102) are symmetrically arranged on the bottom plate (1), and the support blocks (102) are rotatably connected to the placement frame (2). A first motor (104) is arranged on one of the support blocks (102), and the output end of the first motor (104) is fixedly connected to the placement frame (2). A plurality of spot welding holes are provided at the lower end of the interior of the placement frame (2), and a rotation groove is provided on the bottom plate (1).

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