A battery pack laser automatic welding device and welding method

Abstract

This invention relates to an automatic laser welding device for battery packs, comprising an upper transport platform and a lower transport platform. A lifting component is provided on one side of the lower transport platform, and a rotating component and a receiving component driven by the rotating component are provided in the middle of the upper transport platform. An opening and closing component is provided on the receiving component, and a welding component is provided on one side of the upper transport platform. The lifting component is used to lift and lower the battery pack on the lower transport platform, the receiving component is used to receive the terminals on the upper transport platform, the rotating component is used to drive the terminals to rotate, the opening and closing component is used to limit the terminals while making the terminals fit with the battery pack, and the welding component is used to weld the terminals to the battery pack, thereby accelerating the feeding speed and improving the welding efficiency.

Description

Technical Field

[0001] This invention relates to the field of battery welding technology, and more specifically to an automatic laser welding device and welding method for battery packs. Background Technology

[0002] Lead-acid batteries are currently widely used in automobiles, trains, and communication and radar systems. With the development of the world's energy economy and the continuous improvement of people's living standards, lead-acid batteries have accounted for more than 85% of the market share in secondary power supply applications. Among these applications, the welding of the battery to the terminals is particularly important in the battery manufacturing process.

[0003] Currently, most welding methods still rely on manual welding, which is not only labor-intensive but also results in a poor working environment. The gases produced during welding have adverse effects on workers. In addition, welding machines on the market consume a great deal of energy when welding terminals and batteries, and the slow feeding speed leads to slow welding efficiency, which is not conducive to expanding the scale of battery production. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an automatic laser welding device for battery packs. The device uses a rotating component and a receiving component to support and rotate the terminal block, causing the welding section of the terminal block to face the welding point of the battery pack. A lifting component raises the battery pack to contact the welding section of the terminal block while simultaneously bringing the terminal block closer to a second opening and closing plate, thus fixing the battery pack to the welding section of the terminal block. This prevents shaking or displacement during welding, speeds up the feeding process, and improves welding efficiency.

[0005] The technical solution of the present invention is as follows:

[0006] An automatic laser welding device for battery packs includes an upper transport platform and a lower transport platform. A lifting component is provided on one side of the lower transport platform, and a rotating component and a receiving component driven by the rotating component are provided in the middle of the upper transport platform. An opening and closing component is provided on the receiving component, and a welding component is provided on one side of the upper transport platform. The lifting component is used to lift and lower the battery pack on the lower transport platform. The receiving component is used to receive the terminals on the upper transport platform. The rotating component is used to drive the terminals to rotate. The opening and closing component is used to limit the terminals while making the terminals fit with the battery pack. The welding component is used to weld the terminals to the battery pack.

[0007] As a preferred embodiment, the lifting assembly includes a telescopic rod disposed in the middle of the lower transport platform, a lifting platform slidably disposed on the telescopic rod, and a cylinder disposed below the lifting platform.

[0008] As a preferred embodiment, the rotating assembly includes a housing fixedly mounted on the upper transport platform, a first gear and a second gear disposed within the housing, and a motor connected to the first gear, wherein the first gear and the second gear mesh with each other.

[0009] As a preferred embodiment, the receiving assembly includes a fixed shaft fixedly connected to the first gear and the second gear respectively, and a receiving box connected to the fixed shaft, wherein the receiving box cooperates with the terminal block.

[0010] As a preferred embodiment, the opening and closing assembly includes a first opening and closing plate and a second opening and closing plate rotatably disposed on both sides of the receiving box, a limiting plate disposed on the receiving box, and a spring disposed on the first opening and closing plate. The limiting plate cooperates with the first opening and closing plate, and the spring cooperates with the terminal block. Both the first opening and closing plate and the second opening and closing plate are connected to the receiving box through torsion springs.

[0011] As a preferred embodiment, the welding assembly includes a welding robot.

[0012] As a preferred option, the upper transport platform is equipped with a partition.

[0013] As a preferred embodiment, the lifting platform is equipped with baffles.

[0014] As a preferred embodiment, both the enclosure and the baffle are provided with a rubber layer.

[0015] Another objective of this invention is to provide a welding method for automated laser welding of battery packs, which specifically includes the following steps:

[0016] Step 1: Place the battery packs on the lower transport platform in sequence, and place the terminals on the upper transport platform in sequence. When the battery packs are transported to the lifting platform, the terminals pass through the first opening and closing plate into the receiving box and are limited by the action of the second opening and closing plate.

[0017] Step 2: The motor drives the first gear and the second gear to rotate relative to each other, causing the receiving box to rotate so that the welded section of the terminal is facing down. At the same time, the cylinder lifts the lifting platform to bring the battery pack close to the welded section of the terminal.

[0018] Step 3: After the battery pack makes contact with the welding section of the terminal block, move the terminal block closer to the first opening plate during the upward movement to fix the battery pack to the terminal block.

[0019] Step 4: Weld the contact points between the battery pack and the terminal block using a welding robot.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. This invention includes a lifting assembly, a rotating assembly, and a receiving assembly. When the battery pack is transported to the lifting platform, the terminal block passes through the first opening plate into the receiving box. After being fixed and limited by the second opening plate, the motor drives the first gear and the second gear to rotate relative to each other, so that the welding section of the terminal block faces the battery pack. Then the lifting platform raises the battery pack until it is in contact with the terminal block, preparing for welding, improving the feeding speed and the efficiency of automated welding.

[0022] 2. This invention is equipped with an opening and closing assembly and a welding assembly. When the welding section of the terminal block faces the battery pack, the lifting platform lifts the battery pack upwards, bringing it close to the terminal block until it is in contact with it. During the continued upward movement, the terminal block is moved closer to the first opening and closing plate and is cushioned by the spring, making the welding section of the terminal block fit more firmly with the battery pack. This prevents displacement or shaking during welding, which could lead to welding failure. After welding is completed, the battery pack descends, causing the terminal block to move downwards and the second opening and closing plate to flip outwards. The terminal block then detaches from the receiving box and descends with the battery pack to complete the unloading process.

[0023] In summary, this invention has the advantages of fast material feeding speed and good welding effect, and is suitable for the field of battery welding technology. Attached Figure Description

[0024] The invention will be further described below with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of a laser automatic welding device for battery packs.

[0026] Figure 2 This is a schematic diagram showing the state of the terminal block when it passes through the first opening plate and enters the receiving box.

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a schematic diagram showing the state when the motor drives the first gear and the second gear to rotate.

[0029] Figure 5 This is a schematic diagram showing the state when the terminal welding section faces the battery pack after the receiving box is rotated.

[0030] Figure 6 A schematic diagram showing the state when the battery pack is raised and the terminals are brought close to the first opening and closing plate and the limiting plate for limiting and fixing;

[0031] Reference numerals: 1 Upper transport platform, 2 Lower transport platform, 3 Lifting assembly, 31 Telescopic rod, 32 Lifting platform, 33 Cylinder, 4 Rotating assembly, 41 Box, 42 First gear, 43 Second gear, 44 Motor, 5 Receiving assembly, 51 Fixed shaft, 52 Receiving box, 6 Opening and closing assembly, 61 First opening and closing plate, 62 Second opening and closing plate, 63 Limiting plate, 64 Spring, 7 Welding assembly, 71 Welding robot, 8 Battery pack, 9 Terminal block, 11 Enclosure, 12 Baffle. Detailed Implementation

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] Example 1

[0034] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] like Figures 1 to 6 As shown, an automatic laser welding device for battery packs includes an upper transport platform 1 and a lower transport platform 2. A lifting component 3 is provided on one side of the lower transport platform 2. A rotating component 4 and a receiving component 5 driven by the rotating component 4 are provided in the middle of the upper transport platform 1. An opening and closing component 6 is provided on the receiving component 5. A welding component 7 is provided on one side of the upper transport platform 1. The lifting component 3 is used to lift and lower the battery pack 8 on the lower transport platform 2. The receiving component 5 is used to receive the terminal 9 on the upper transport platform 1. The rotating component 4 is used to drive the terminal 9 to rotate. The opening and closing component 6 is used to limit the terminal 9 and make the terminal 9 fit with the battery pack 8. The welding component 7 is used to weld the terminal 9 and the battery pack 8.

[0036] like Figure 2 As shown, the lifting assembly 3 includes a telescopic rod 31 set in the middle of the lower transport platform 2, a lifting platform 32 slidably set on the telescopic rod 31, and a cylinder 33 set below the lifting platform 32. The cylinder 33 can drive the battery pack 8 to rise and fit with the terminal 9 for welding. After welding is completed, the cylinder 33 drives the battery pack 8 to fall and reset. Then the welded battery pack 8 can be taken out, which speeds up the welding efficiency.

[0037] like Figure 4As shown, the rotating assembly 4 includes a housing 41 fixedly mounted on the upper transport platform 1, a first gear 42 and a second gear 43 mounted inside the housing 41, and a motor 44 connected to the first gear 42. The first gear 42 and the second gear 43 mesh with each other, and the motor 44 drives the first gear 42 and the second gear 43 to rotate relative to each other, so that the welding section of the terminal 9 faces the battery pack 8, thereby improving the efficiency of automated welding.

[0038] like Figures 3 to 5 As shown, the receiving assembly 5 includes a fixed shaft 51 fixedly connected to the first gear 42 and the second gear 43 respectively, and a receiving box 52 connected to the fixed shaft 51. The receiving box 52 cooperates with the terminal 9. In use, when the battery pack 8 is transported to the lifting platform 32, the terminal 9 passes through the first opening plate 61 and enters the receiving box 52, and is fixed and limited by the obstruction of the second opening plate 62. Then, under the rotation of the rotating assembly 4, the receiving box 52 rotates 90°, and the welding section of the terminal 9 faces the battery pack 8, in preparation for welding.

[0039] like Figure 6 As shown, the opening and closing assembly 6 includes a first opening and closing plate 61 and a second opening and closing plate 62 rotatably disposed on both sides of the receiving box 52, a limiting plate 63 disposed on the receiving box 52, and a spring 64 disposed on the first opening and closing plate 61. The limiting plate 63 cooperates with the first opening and closing plate 61, and the spring 64 cooperates with the terminal 9. Both the first opening and closing plate 61 and the second opening and closing plate 62 are connected to the receiving box 52 through torsion springs. In use, when the welding section of the terminal 9 faces the battery pack 8, the lifting platform 32 drives the battery pack 8 to rise, so that the battery pack 8... Approaching terminal 9 until it is in contact with terminal 9, and continuing to rise, it moves terminal 9 closer to the first opening plate 61 for contact. Under the action of spring 64, it is buffered, making the welding section of terminal 9 more firmly attached to the battery pack 8, preventing displacement or shaking during welding and thus preventing welding failure. After welding is completed, the battery pack 8 moves terminal 9 downward during descent, causing the second opening plate 62 to flip outward. Terminal 9 is released from the receiving box 52 and descends together with the battery pack 8 to complete the unloading.

[0040] like Figure 1 As shown, the welding assembly 7 includes a welding robot 71, which welds the welding section of the terminal 9 to the place where it contacts the battery pack 8. This technology is a mature existing technology and will not be described in detail here.

[0041] like Figure 1 As shown, a partition 11 is provided on the upper transport platform 1. The partition 11 makes the transport of the terminal block 9 more stable and allows the terminal block 9 to enter the receiving box 52 smoothly.

[0042] like Figure 1As shown, a baffle 12 is provided on the lifting platform 32 to position the battery pack 8, thereby aligning the welding points on the battery pack 8 with the welding sections of the terminals 9 to prevent misalignment.

[0043] like Figure 1 As shown, both the enclosure 11 and the baffle 12 are provided with a rubber layer. Due to the good adhesion and flexibility of the rubber, the terminal 9 and the battery pack 8 are more stable during transportation, while preventing the enclosure 11 and the baffle 12 from damaging the battery pack 8 and the terminal 9.

[0044] Example 2

[0045] A method for automated laser welding of battery packs, the method specifically includes the following steps:

[0046] Step 1: Place the battery pack 8 on the lower transport platform 2 in sequence, and place the terminal block 9 on the upper transport platform 1 in sequence. When the battery pack 8 is transported to the lifting platform 32, the terminal block 9 passes through the first opening and closing plate 61 and enters the receiving box 52, and is limited by the action of the second opening and closing plate 62.

[0047] Step 2: The motor 44 drives the first gear 42 and the second gear 43 to rotate relative to each other, causing the receiving box 52 to rotate so that the welding section of the terminal 9 faces downward. At the same time, the cylinder 33 lifts the lifting platform 32 to bring the battery pack 8 close to the welding section of the terminal 9.

[0048] Step 3: After the battery pack 8 contacts the welding section of the terminal 9, the terminal 9 is moved closer to the first opening and closing plate 61 during the upward process to fix the battery pack 8 and the terminal 9.

[0049] Step 4: Weld the contact points between the battery pack 8 and the terminal 9 using welding robot 71.

[0050] Working process: First, the battery pack 8 and the terminal 9 are placed on the lower transport platform 2 and the upper transport platform 1 respectively for transportation. When the battery pack 8 is transported to the lifting platform 32, the terminal 9 passes through the first opening plate 61 and enters the receiving box 52, and is fixed and limited by the second opening plate 62. Then, the motor 44 drives the first gear 42 and the second gear 43 to rotate relative to each other, so that the welding section of the terminal 9 faces the battery pack 8. The lifting platform 32 lifts the battery pack 8, so that the battery pack 8 is close to the terminal 9 until it is in contact with the terminal 9. During the continued rise, the terminal 9 is moved closer to the first opening plate 61 and is cushioned by the spring 64, so that the welding section of the terminal 9 is more firmly attached to the battery pack 8, preventing displacement or shaking during welding and thus welding failure. After welding is completed, the battery pack 8 moves the terminal 9 downward during the descent, so that the second opening plate 62 flips outward, and the terminal 9 is released from the receiving box 52 and descends together with the battery pack 8 to complete the unloading.

[0051] In the description of this invention, it should be understood that the terms "front and back", "left and right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0052] Of course, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.

[0053] The above description, in conjunction with the accompanying drawings, is merely a preferred embodiment of the present invention. However, the present invention is not limited to the above-described embodiments. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention. These modifications and improvements should also be considered within the scope of protection of the present invention and will not affect the effectiveness and practicality of the present invention.

Claims

1. A battery pack laser automatic welding device, comprising an upper transport table (1) and a lower transport table (2), characterized in that: A lifting assembly (3) is provided on one side of the lower transport platform (2), a rotating assembly (4) and a receiving assembly (5) driven by the rotating assembly (4) are provided in the middle of the upper transport platform (1), an opening and closing assembly (6) is provided on the receiving assembly (5), and a welding assembly (7) is provided on one side of the upper transport platform (1). The lifting assembly (3) is used to drive the battery pack (8) on the lower transport platform (2) to move up and down. The receiving assembly (5) is used to receive the terminal (9) on the upper transport platform (1). The rotating assembly (4) is used to drive the terminal (9) to rotate. The opening and closing assembly (6) is used to limit the terminal (9) while making the terminal (9) fit with the battery pack (8). The welding assembly (7) is used to weld the terminal (9) to the battery pack (8). The rotating assembly (4) includes a housing (41) fixedly mounted on the upper transport platform (1), a first gear (42) and a second gear (43) mounted inside the housing (41), and a motor (44) connected to the first gear (42), wherein the first gear (42) and the second gear (43) mesh with each other; The receiving assembly (5) includes a fixed shaft (51) fixedly connected to the first gear (42) and the second gear (43) respectively, and a receiving box (52) connected to the fixed shaft (51). The receiving box (52) cooperates with the terminal (9). The opening and closing assembly (6) includes a first opening and closing plate (61) and a second opening and closing plate (62) rotatably disposed on both sides of the receiving box (52), a limiting plate (63) disposed on the receiving box (52), and a spring (64) disposed on the first opening and closing plate (61). The limiting plate (63) cooperates with the first opening and closing plate (61), and the spring (64) cooperates with the terminal (9). The first opening and closing plate (61) and the second opening and closing plate (62) are both connected to the receiving box (52) through torsion springs.

2. The automatic laser welding device for battery packs according to claim 1, characterized in that: The lifting assembly (3) includes a telescopic rod (31) disposed in the middle of the lower transport platform (2), a lifting platform (32) slidably disposed on the telescopic rod (31), and a cylinder (33) disposed below the lifting platform (32).

3. The automatic laser welding device for battery packs according to claim 1, characterized in that: The welding assembly (7) includes a welding robot (71).

4. The automatic laser welding device for battery packs according to claim 2, characterized in that: The upper transport platform (1) is equipped with a partition (11).

5. The automatic laser welding device for battery packs according to claim 4, characterized in that: The lifting platform (32) is equipped with a baffle (12).

6. The automatic laser welding device for battery packs according to claim 5, characterized in that: Both the enclosure (11) and the baffle (12) are provided with a rubber layer.

7. The welding method of the automatic laser welding device for battery packs according to claim 3, characterized in that: The method specifically includes the following steps: Step 1: Place the battery pack (8) on the lower transport platform (2) in sequence, and place the terminal block (9) on the upper transport platform (1) in sequence. When the battery pack (8) is transported to the lifting platform (32), the terminal block (9) passes through the first opening and closing plate (61) and enters the receiving box (52), and is limited by the action of the second opening and closing plate (62). Step 2: The motor (44) drives the first gear (42) and the second gear (43) to rotate relative to each other, causing the receiving box (52) to rotate so that the welding section of the terminal (9) faces downward. At the same time, the cylinder (33) lifts the lifting platform (32) to bring the battery pack (8) close to the welding section of the terminal (9). Step 3: After the battery pack (8) contacts the welding section of the terminal (9) as it rises, the terminal (9) is moved closer to the first opening and closing plate (61) as it continues to rise, and the battery pack (8) and the terminal (9) are fixed together. Step 4: Weld the contact points of the battery pack (8) and the terminal block (9) using a welding robot (71).

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