A distance measuring component for soft pack battery welding

Abstract

The present invention relates to the field of battery processing technology, and more specifically, to a distance-measuring assembly for soft-pack battery welding. The assembly comprises a distance-measuring assembly mounted on a base frame. The distance-measuring assembly is used to measure and locate the welding position of the soft-pack battery by penetrating the small-diameter aperture of a welding auxiliary component. The distance-measuring assembly includes four distance-measuring instruments arranged in an intersecting and tilted manner, so that the laser beams of the four distance-measuring instruments intersect and stagger through the small-diameter welding auxiliary component. This solves the problem of the difficulty in accurately positioning and ensuring the processing quality of soft-pack batteries during the existing laser welding process.

Description

Technical Field

[0001] The present invention relates to the technical field of battery processing, and in particular to a distance measuring component for welding soft-pack batteries. Background Art

[0002] Welding technology plays a crucial role in the production of soft-pack batteries. Key battery components, including electrodes, tabs, solid-state electrolyte membranes, and battery casings, must be connected through welding to ensure the battery's electrical performance and structural stability. High-quality welding processes ensure the reliability of electrical connections between battery components, reducing resistance and thereby improving the battery's charge and discharge efficiency and cycle life. Furthermore, welding technology ensures the sealing of the battery casing, effectively preventing electrolyte leakage and thus enhancing battery safety.

[0003] In current pouch cell laser welding technology, precise welding equipment positioning is crucial for ensuring weld quality, ultimately maintaining the quality of pouch cell processing. While various positioning technologies and methods exist, they still have limitations. For example, the recognition accuracy of some vision-based positioning systems is negatively impacted by shielding gases and nozzles. Mechanical positioning methods, however, struggle to achieve high-precision positioning due to the tiny size and complex shape of battery components. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that it is difficult to accurately position the soft-pack battery during the laser welding process to ensure the processing quality of the soft-pack battery, and to provide a ranging component for soft-pack battery welding.

[0005] In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: a distance measuring assembly for soft-pack battery welding, which comprises a distance measuring assembly arranged on a base frame, and the distance measuring assembly is used to pass through the small-diameter part of the welding auxiliary part to measure and locate the welding position of the soft-pack battery;

[0006] The distance measuring assembly includes four distance measuring instruments that are staggered and tilted, so that the laser lines of the four distance measuring instruments cross and stagger and pass through the small-caliber welding auxiliary parts.

[0007] As a further optimization of the distance measuring assembly for soft-pack battery welding of the present invention: the four distance measuring instruments are arranged in groups of two along the distribution direction of the soft-pack battery welding positions, the two groups of distance measuring instruments are respectively arranged on two supporting plates, and the two supporting plates are both arranged on the connecting plates. The connecting plates are driven by a pushing cylinder arranged on the base frame to be arranged along the distribution direction of the soft-pack battery welding positions.

[0008] As a further optimization of the distance measuring assembly for soft-pack battery welding of the present invention: the distance measuring instrument is arranged in a rectangular shape, a group of opposite ends of the distance measuring instrument and the ends facing the laser generating port are connected together with the arc groove, the arc groove is opened on the supporting plate, and a group of ends of the distance measuring instrument facing away from the arc groove are rotatably connected to the supporting plate.

[0009] As a further optimization of the distance measuring assembly for soft-pack battery welding of the present invention: the welding auxiliary component includes two welding nozzles, and one welding nozzle corresponds to a corresponding set of distance measuring instruments.

[0010] As a further optimization of the ranging assembly for soft-pack battery welding of the present invention: a transmission tube is provided on the welding nozzle, and the transmission tube is divided into two parts, one part is used to transmit protective gas, and the other part is used to recover exhaust gas.

[0011] As a further optimization of the distance measuring component for soft-pack battery welding of the present invention: the distance measuring instrument is a laser distance measuring instrument.

[0012] As a further optimization of the distance measuring component for soft-pack battery welding of the present invention: any one of the welding nozzles is arranged on the base frame through a positioning seat, and the position of the other welding nozzle is adjusted by a regulating component arranged on the base frame.

[0013] As a further optimization of the ranging component for soft-pack battery welding of the present invention: the regulating component includes a fixed seat connected to the corresponding welding nozzle, the fixed seat slidingly cooperates with the slide rail provided on the base frame, the fixed seat is threadedly connected to the threaded rod rotatably provided on the base frame, and the threaded rod is driven by a drive motor provided on the base frame.

[0014] As a further optimization of the distance measuring assembly for soft-pack battery welding of the present invention: the threaded rod and the base frame are connected together through a bearing seat.

[0015] As a further optimization of the distance measuring component for soft-pack battery welding of the present invention: the two welding nozzles are covered with a protective shell arranged on the base frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention utilizes four rangefinders arranged in an oblique and staggered configuration to enable the laser path to cross-penetrate the welding nozzle, thereby accurately measuring and locating the welding points of the soft-pack battery tabs. This cross-penetration of the laser path can adapt to the narrow aperture of the welding nozzle and avoid interference with the laser path. During the soft-pack battery tab welding process, this configuration ensures accurate measurement of the weld point, enabling the electronic control structure to be adjusted accordingly to ensure precise alignment of the weld point with the welding nozzle. This method guarantees the quality of the soft-pack battery processing process to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a front view structural schematic diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the shaft side structure of the present invention;

[0020] Figure 3 This is an enlarged structural diagram of point A of the present invention;

[0021] Figure 4 Schematic diagram of the detection route structure of the present invention;

[0022] Markings in the figure: 1. Distance measuring component; 101. Push cylinder; 102. Connecting plate; 103. Load-bearing plate; 104. Distance measuring instrument; 105. Laser circuit; 106. Arc groove; 2. Base frame; 3. Protective shell; 4. Control component; 401. Fixed seat; 402. Moving connecting plate; 403. Threaded sleeve; 404. Bearing seat; 405. Threaded rod; 406. Drive motor; 407. Slide rail; 5. Welding accessories; 501. Positioning seat; 502. Welding nozzle; 503. Transmission tube. DETAILED DESCRIPTION

[0023] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with examples, but the content of the present invention is not limited to the following examples.

[0024] like Figure 1 As shown, a distance measuring component for welding soft-pack batteries includes a distance measuring component 1 whose core lies in its ability to accurately measure the tab welding position of the soft-pack battery corresponding to the two welding nozzles 502. The distance measuring component 1 is installed on the base frame 2, and measures the tab welding position by passing through the two welding nozzles 502 included in the welding auxiliary part 5. This design not only simplifies the operation process, but also improves the accuracy and stability of the measurement. After completing the measurement, the distance measuring component 1 can immediately adjust the position of the soft-pack battery through the electronic control structure to ensure that the tab welding position accurately corresponds to the two welding nozzles 502. Subsequently, the electronic control structure controls the laser welding head to overlap with the two welding nozzles 502 in turn, and laser welding is performed on the welding position of the soft-pack battery. This process is not only highly automated, but also has stable and reliable welding quality.

[0025] During the specific welding process, the welding nozzle 502 is responsible for ejecting the shielding gas. The welding nozzle 502 ejects the shielding gas from the welding nozzle 502 through the portion of the transmission tube 503 connected to it, to assist the laser in performing high-quality welding on the tabs of the soft-pack battery. The use of shielding gas can effectively prevent oxidation and contamination generated during the welding process and improve welding quality. At the same time, the other portion of the transmission tube 503 connected to the welding nozzle 502 can also generate negative pressure to absorb harmful gases generated during the laser welding of the tabs of the soft-pack battery. This design not only protects the working environment, but also ensures the health and safety of the operators.

[0026] like Figure 2 and Figure 3 As shown, in order to adapt to the spacing between the welding positions of the tabs of soft-pack batteries in a small range, a regulating component 4 is provided. One of the two welding nozzles 502 is fixed on the base frame 2 through a positioning seat 501, while the other welding nozzle 502 is fixed on the fixing seat 401 included in the regulating component 4. The fixing seat 401 is threadedly connected to the threaded rod 405. Specifically, the threaded rod 405 is threadedly connected to the threaded sleeve 403 provided on the fixing seat 401. The threaded rod 405 is arranged along the distribution direction of the welding positions of the soft-pack batteries, that is, in the horizontal direction. The optical axes at both ends of the threaded rod 405 are fixed to the base frame 2 through the bearing seat 404 to ensure the stability and reliability of the entire structure. The threaded rod 405 is driven by a drive motor 406 provided on the base frame 2, which is convenient for the operator to adjust the position between the two welding nozzles 502 according to the spacing between the welding positions of the tabs of the soft-pack batteries. The fixing base 401 slides with the slide rail 407 on the base 2 to further maintain the stability of the fixing base 401's movement. It also cooperates with the threaded rod 405 to precisely adjust the spacing between the two welding nozzles 502. The two welding nozzles 502 are covered by a protective shell 3 on the base 2. The welding nozzles 502 can pass through the protective shell 3 to cooperate with the laser welding head to weld the tab welding position of the soft-pack battery. The protective shell 3 protects the two welding nozzles 502, reducing the possibility of the protective shell 3 being displaced or damaged by external factors.

[0027] The distance measuring assembly 1 includes a push cylinder 101 mounted on the base frame 2 and capable of displacement along the distribution direction of the soft-pack battery welding positions. The push cylinder 101 can push the connecting plate 102, thereby driving the two supporting plates 103 fixedly connected to the connecting plate 102 to displace along the tab welding positions of the soft-pack battery. This in turn drives the two rangefinders 104 provided on both supporting plates 103 to displace, thereby corresponding to the two welding nozzles 502 for precise positioning during the soft-pack battery tab welding process. The two supporting plates 103 are arranged sequentially along the distribution direction of the soft-pack battery welding positions, so that the two rangefinders 104 provided on both supporting plates 103 can be staggered to correspond to the two welding nozzles 502, thereby ensuring that the laser emission ports of the four rangefinders 104 are all exposed for distance measurement, thereby improving the accuracy and comprehensiveness of the measurement. In this embodiment, the rangefinder 104 is an infrared laser rangefinder 104. The infrared laser rangefinder 104 has the advantages of high measurement accuracy, fast response speed, and strong anti-interference ability, and is suitable for measurement needs in various complex environments. like Figure 4As shown, the two rangefinders 104 installed on the carrier plate 103 are arranged at an angle, allowing the laser lines 105 of the four rangefinders 104 to intersect and cross the small-diameter welding openings of the two welding nozzles 502 to correspond with the four vertices of the soft-pack battery tab, thereby assisting in determining the welding position of the soft-pack battery tab. After reflecting at the four vertices of the soft-pack battery tab, the laser light again crosses the welding opening of the welding nozzle 502 and is detected by the rangefinder 104. This process not only achieves accurate measurement and verification of the tab position, but also improves the reliability and stability of the measurement.

[0028] After completing the precise distance measurement, the electronic control structure can be manipulated and fine-tuned to ensure that the tab, that is, the tab welding position, corresponds precisely to the welding nozzle 502. This step is crucial to improving welding quality and efficiency. In order to ensure the stability and adaptability of the rangefinder 104, the rangefinder 104 is designed to be square in shape, and two arc grooves 106 are provided at the center of the carrier plate 103. The two rangefinders 104 are connected to the arc groove 106 by bolts at the top corners facing the laser emission port, while the two rangefinders 104 are connected to the carrier plate 103 by bolts at the top corners facing away from the arc groove 106. This design allows users to flexibly adjust the position and angle of the rangefinder 104 according to the specific parameters of the soft-pack battery and the welding nozzle 502 to adapt to the welding processing distance measurement and positioning process of soft-pack batteries of different models.

[0029] The use and structure of the laser welding head and the electric control structure in this specific embodiment should be understood as existing technology.

[0030] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various variations or modifications within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A distance measuring assembly for soft pack battery welding, characterized by: It has a distance measuring component (1) arranged on a base frame (2), and the distance measuring component (1) is used to pass through the small-caliber portion of the welding auxiliary component (5) to measure and locate the welding position of the soft-pack battery; The distance measuring assembly (1) comprises four distance measuring instruments (104) arranged in a staggered and tilted manner, so that the laser lines (105) of the four distance measuring instruments (104) cross and stagger through the small-caliber welding auxiliary component (5); The four distance meters (104) are arranged in groups of two along the distribution direction of the soft pack battery welding positions. The two groups of distance meters (104) are respectively arranged on two supporting plates (103). The two supporting plates (103) are both arranged on a connecting plate (102). The connecting plate (102) is driven by a pushing cylinder (101) arranged on the base frame (2) to be arranged along the distribution direction of the soft pack battery welding positions. The rangefinders (104) are arranged in a rectangular shape, and the ends of a group of rangefinders (104) facing the laser generating port are connected to the arc groove (106), the arc groove (106) is provided on the supporting plate (103), and the ends of a group of rangefinders (104) facing away from the arc groove (106) are rotatably connected to the supporting plate (103); The welding auxiliary component (5) includes two welding nozzles (502) corresponding to the four rangefinders (104) respectively; Any one of the welding nozzles (502) is arranged on the base frame (2) via a positioning seat (501), and the position of the other welding nozzle (502) is regulated by a regulating component (4) arranged on the base frame (2).

2. A distance measuring assembly for soft pack battery welding according to claim 1, characterized in that: The welding nozzle (502) is provided with a transmission pipe (503), which is divided into two parts, one part is used to transmit the protective gas, and the other part is used to recover the waste gas.

3. The distance measuring assembly for soft pack battery welding according to claim 1, characterized in that: The rangefinder (104) is a laser rangefinder (104).

4. A distance measuring assembly for soft pack battery welding according to claim 1, characterized in that: The regulating assembly (4) includes a fixed seat (401) connected to the corresponding welding nozzle (502), the fixed seat (401) slidingly cooperates with a slide rail (407) provided on the base frame (2), the fixed seat (401) is threadedly connected to a threaded rod (405) rotatably provided on the base frame (2), and the threaded rod (405) is driven by a driving motor (406) provided on the base frame (2).

5. A distance measuring assembly for soft pack battery welding according to claim 4, characterized in that: The threaded rod (405) and the base frame (2) are connected together via a bearing seat (404).

6. The distance measuring assembly for soft pack battery welding according to claim 1, characterized in that: The two welding nozzles (502) are covered with a protective shell (3) provided on the base frame (2).

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