Soft package cell tab cutting and welding integrated device

Abstract

The utility model provides a soft package battery cell tab cutting and welding integrated device, relates to the battery manufacturing related technical field, including displacement drive piece, upper cutting die, base and lower cutting die, the lower cutting die is used for placing battery cell, the upper cutting die is equipped with welding mechanism, displacement drive piece is used for driving the upper cutting die and the lower cutting die to realize mutual approaching and leaving action, the base is equipped with welding mechanism, and the displacement drive piece is used for driving the upper cutting die and the lower cutting die. A pole piece pressing part is arranged above the blade of the upper cutting die, the blade of the upper cutting die is jointed with the lower cutting die to complete tab cutting, when the tab is cut in place, the pole piece is accurately pressed on the tab after a battery cell is cut, preparation and positioning of the pole piece are completed, the welding mechanism executes welding of the pole piece and the tab, and the welding accuracy is ensured. By means of the integrated design, cutting and welding of the tabs are conducted synchronously, and the problems of positioning errors and low production efficiency caused by step-by-step operation in the prior art are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field related to battery manufacturing, in particular to an integrated device for cutting and welding the tabs of a soft-pack battery cell. Background Art

[0002] The current existing technologies generally can only cut the tabs alone, and the equipment cannot meet the requirements of secondary processing or adjustment of the tabs that have been welded to the battery cell. This limitation not only restricts the flexibility and application scope of the equipment in the production process, but also may lead to a reduction in production efficiency.

[0003] Moreover, the existing technologies have a large structure volume, the positioning equipment for re-welding is complex, the equipment cost is high, the tab cutting and welding are in two separate positions respectively. Therefore, a robotic arm and a CCD are required for additional positioning steps, which increases the positioning error. The positioning of the process robotic arm is more complex, prone to errors in the welding position. The transfer between the two processes may cause positioning errors of the tabs, increasing the operation CT time. In view of the above defects, this application is proposed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an integrated device for cutting and welding the tabs of a soft-pack battery cell, which completes the tab cutting and welding at the same position. When cutting the battery cell, a special knife die tooling is used to press the battery cell and the tab firmly, and welding is carried out at the cutting position simultaneously, shortening the process time and reducing the defects caused by positioning errors.

[0005] To solve the above problems, the utility model provides an integrated device for cutting and welding the tabs of a soft-pack battery cell, including a displacement driving member, an upper knife die, a base and a lower knife die. The lower knife die is used for placing the battery cell, a welding mechanism is installed on the upper knife die, the displacement driving member is used to drive the upper knife die and the lower knife die to move closer to and away from each other. There is a tab pressing part above the cutting edge of the upper knife die. After the tab is installed on the upper knife die, at least part of it is located at the tab pressing part position. The cutting edge of the upper knife die engages with the lower knife die to complete the tab cutting. When the cutting is in place, the tab is accurately pressed on the tab of the battery cell after cutting, completing the preparation and positioning of the tab. The welding mechanism performs the welding of the tab and the battery cell tab to ensure the accuracy of the welding.

[0006] According to an embodiment of the utility model, a gap for the tab to pass through is provided at the top position of the upper knife die.

[0007] According to an embodiment of the utility model, a fixing member is arranged on the upper knife die, and the fixing member is used to press and fix the tab to be welded.

[0008] According to an embodiment of the utility model, the fixing member includes an elastic sheet fixing piece.

[0009] According to an embodiment of the present utility model, a battery cell positioning area is provided on the lower cutting die, which is used to ensure the accurate positioning of the battery cell during the cutting and welding processes.

[0010] According to an embodiment of the present utility model, the battery cell positioning area is composed of a region surrounded by a plurality of positioning fixing blocks.

[0011] According to an embodiment of the present utility model, the welding mechanism includes a multi-contact spot welding gun, and the multi-contact spot welding gun is connected to a welding machine.

[0012] According to an embodiment of the present utility model, a slope is provided at the rear of the base, and the slope is used to ensure that the waste materials after the cutting of the battery cell tabs can be discharged in a timely and smooth manner.

[0013] According to an embodiment of the present utility model, the displacement driving member includes a cylinder, and the cylinder is connected to the upper cutting die.

[0014] According to an embodiment of the present utility model, a cylinder bracket is provided on the base, a guide sleeve and a guide rod are provided on the cylinder bracket, and the guide rod is connected to the upper cutting die.

[0015] The beneficial effects of the present utility model are as follows: through the integrated design, the simultaneous cutting and welding of the tabs are realized, effectively solving the problems of positioning errors and low production efficiency caused by step-by-step operations in the prior art. The upper cutting die and the lower cutting die adopted ensure the accurate cutting of the tabs. The specially designed die tooling can stably hold the battery cell and the electrode plate during cutting. With the use of the elastic sheet type fixing piece and the limiting frame, the stability and welding accuracy of the electrode plate during the welding process are further improved, the production efficiency is increased, the cost is reduced, the consistency and reliability of the product quality are ensured, and at the same time, the operation experience is optimized, meeting the requirements of modern industrial production for high-efficiency, accurate and environmentally friendly equipment. Description of the Drawings

[0016] The present utility model will be further described below with reference to the drawings and embodiments.

[0017] Figure 1 It is a front structure schematic diagram of a soft-pack battery cell tab cutting and welding integrated device;

[0018] Figure 2 It is a rear structure schematic diagram of a soft-pack battery cell tab cutting and welding integrated device;

[0019] Figure 3 It is a structure schematic diagram of the upper cutting die. Detailed Embodiments

[0020] The following description is only used to disclose the present utility model so that those skilled in the art can implement the present utility model. The embodiments described below are only examples, and those skilled in the art can think of other obvious deformations. The basic principles defined in the following description of the present utility model can be applied to other implementation schemes, deformation schemes, improvement schemes, equivalent schemes, and other schemes that do not depart from the spirit and scope of the present utility model.

[0021]

Embodiment 1

[0022] A soft-pack battery cell tab cutting and welding integrated device, as Figure 1 , includes a displacement driving member, an upper die 81, a base 4, and a lower die 51. The lower die 51 is used to place the battery cell 62. A welding mechanism is installed on the upper die 81. The displacement driving member is used to drive the upper die 81 and the lower die 51 to move closer to and away from each other. Above the cutting edge of the upper die 81, there is a pole piece pressing portion 811. After the pole piece is installed on the upper die 81, it extends to the position of the pole piece pressing portion 811. The cutting edge of the upper die 81 engages with the lower die 51 to complete the tab cutting. When the cutting is in place, the pole piece is accurately pressed on the tab of the battery cell after cutting, completing the preparation and positioning of the pole piece. The welding mechanism performs the welding of the pole piece and the tab to ensure the accuracy of the welding.

[0023] Specifically, the upper die 81 is equipped with a specific cutting edge shape to meet the cutting requirements of the tab material. As <id= Figure 3 shown, the front part of the upper die 81 is set in a stepped shape. A gap 812 for the pole piece to pass through is provided at the top position of the upper die 81. A fixing member 84 is provided on the upper die 81. The fixing member 84 is used to press and fix the pole piece to be welded. In other embodiments, a structure for fixing the pole piece can also be directly provided on the bottom surface of the pole piece pressing portion 811. In this embodiment, the fixing member 84 includes a spring-type fixing piece. There are also two left and right limit frames 82 on the upper die 81, which play a role in fixing and stabilizing the spring-type fixing piece 84. The spring-type fixing piece 84 is installed on the limit frame 82 through a bolt 83. Such a design not only ensures the stable position of the fixing piece but also facilitates adjustment and maintenance. In addition, the welding mechanism is installed at the top position of the pole piece pressing portion 811, enabling precise welding work while cutting the tab.

[0024] In this embodiment, the displacement driving member includes a cylinder 1, and the cylinder 1 is connected to the upper die 81. A cylinder frame 3 is provided on the base 4. A guide sleeve 21 and a guide rod 22 are provided on the cylinder frame 3. The guide rod 22 is connected to the upper die 81. The cylinder 1 serves as a power element to control the vertical movement of the upper die 81 to achieve the tab cutting action. The cylinder frame 3 supports the upper die 81 and is equipped with a guide sleeve 21 and a guide rod 22 to ensure the smooth vertical movement of the upper die 81.

[0025] Guide sleeve 21 and guide rod 22: Provide precise guiding function to ensure the accuracy of the cutting process.

[0026] The base 4 serves as a stable foundation for the equipment and is equipped with a lower cutting die 51 and positioning and fixing blocks 52. The battery cell positioning area is composed of the area surrounded by several positioning and fixing blocks 52. The lower cutting die 51 supports the battery cell 62 and ensures its stability during the cutting and welding processes. The lower cutting die 51 cooperates with the upper cutting die 81 to complete the ear cutting action, and the positioning and fixing blocks 52 ensure the accurate positioning of the battery cell 62 during the cutting and welding processes.

[0027] The ramp 9 is located at the rear of the base 4 and is designed to ensure that the waste materials after the ear cutting of the battery cell can fall and be discharged in a timely and smooth manner, avoiding equipment failures or production interruptions caused by waste material accumulation, and maintaining the cleanliness and efficiency of the operation process.

[0028] The welding mechanism includes a multi-contact spot welding gun 71, and the multi-contact spot welding gun 71 is connected to the welding machine 741.

[0029] The welding machine 741 is used to provide the current required for welding to the multi-contact spot welding gun 71 to ensure the stability and reliability of the welding process. As a key component of the integrated device for cutting and welding the ears of a soft-pack battery cell, the welding machine 741 not only provides the power required for welding but also can have advanced control functions. There is a liquid crystal display screen 742 installed on the welding machine 741, and this display screen can display the power status of the left and right welding guns in real time to ensure that the operator has a clear understanding of the welding process. In addition, the welding machine 741 is also equipped with two knobs 744, corresponding to the left and right welding guns respectively, allowing the operator to independently adjust the power of each welding gun according to specific welding requirements. This design provides greater flexibility and control accuracy to adapt to the power requirements under different materials or welding conditions. The welding machine 741 is also provided with a welding switch button 742 for controlling the start and stop of the welding process. The design of this button ensures the simplicity of the operation and the immediate control of the welding process.

[0030] Using the integrated device for cutting and welding the ears of a soft-pack battery cell to cut and weld the ears of the battery cell, its working steps are as follows:

[0031] 1. Preparation and positioning of the electrode plate: The operator first places the electrode plate to be welded on the upper cutting die 81 according to the requirements. The electrode plate is inserted into the specially designed gap 812 at the front end of the upper cutting die through the limit frame 82.

[0032] 2. Placement and fixation of the battery cell: Place the soft-pack battery cell 62 on the lower cutting die 51 of the base 4 and fix it with the positioning and fixing blocks 52 to ensure the accurate position of the battery cell 62 during the cutting and welding processes.

[0033] 3. Synchronized cutting and welding: The cylinder 1 drives the upper die 81 to descend, and its cutting edge engages with the lower die 51 to complete the cutting of the tab 61. Utilizing the stepped structure of the upper die 81, when the die presses down and cuts in place, the electrode sheet is accurately pressed against the tab after the cell is cut, completing the preparation and positioning of the electrode sheet. Meanwhile, the multi-contact spot welding gun 71 on the upper die starts to perform the welding task at the moment when the tab is cut in place, ensuring the accuracy of welding.

[0034] 4. Welding process control: The welder 741 provides a stable welding current to the spot welding gun 71. The operator can monitor and adjust the power of the welding gun set through the knob 744 via the liquid crystal display screen 742 of the welder 741 to adapt to different welding requirements.

[0035] 5. Scrap discharge: The scrap generated during the cutting process is smoothly discharged through the ramp 9 at the rear of the base 4, ensuring the cleanliness of the production environment and the smooth operation of the equipment.

[0036] 6. Completion of welding and removal of the cell: When the welding task is completed, the cylinder 1 drives the upper die 81 to rise, and the operator immediately removes the cell that has completed cutting and welding for subsequent processes or quality inspection.

[0037] This solution has the following advantages:

[0038] Integrated design: The integrated device for cutting and welding the tabs of the soft-pack cell of the present invention realizes the synchronized cutting and welding of the tabs through an integrated design. This innovation significantly differs from the existing technology where cutting and welding are completed at different workstations. The advantage of this design is that it not only reduces the positioning errors that may occur during the transfer of the tabs between different processes, but also simplifies the production process, reduces the complexity of operation and the overall cycle time (CT time), thus significantly improving the production efficiency.

[0039] 2. Application of positioning mold: The present invention adopts a positioning mold to accurately position the soft-pack cell and its tabs. This innovation ensures the accuracy of tab cutting and avoids the problem in the existing technology that the welded tabs cannot be reprocessed due to structural limitations. Its advantage is that through accurate positioning, the accuracy and consistency of cell tab cutting are improved, ensuring the quality and efficiency of the subsequent welding process.

[0040] 3. Special tooling for the die: The special tooling for the die in the present invention is designed to press the cell and the electrode sheet while cutting the cell. This innovation optimizes the stability of the cutting process. Its advantage is that through this design, the device can keep the cell and the electrode sheet stable during cutting, reducing production quality problems caused by equipment complexity and manipulator positioning errors.

[0041] 4. Spring-type fixing plate and limit frame: The upper cutting die 81 of the present invention is designed with a spring-type fixing plate 84, which is mounted on the limit frame 82 via bolts 83. This innovation provides a simple and effective way to secure the electrode to be welded. Its advantage is that this fixing method not only improves the stability of the electrode during the welding process, but also ensures the precision of the welding operation, thereby improving the welding quality.

[0042] 5. Advanced Controls on the Welding Machine 741: The Welding Machine 741 features advanced control features, including an LCD screen 742 displaying torch power, a power adjustment knob 744, and a weld on / off button 742. This innovative feature allows the operator to monitor and adjust the welding process in real time. This design offers greater flexibility and control precision, enabling the machine to adapt to the power requirements of different materials or welding conditions, ensuring a stable and reliable welding process.

[0043] 6. Slope Design: The slope 9 at the rear of the base 4 ensures the timely and smooth discharge of cut waste. This innovative feature optimizes the waste handling process. Its advantages include maintaining a clean production environment, preventing equipment failures or production interruptions caused by waste accumulation, and improving equipment efficiency and production continuity.

[0044] 7. Improved production efficiency and product quality: This invention improves production efficiency and ensures consistent and reliable product quality through integrated design and precise control. This innovation represents a significant improvement over existing technologies. Its advantages include reducing defective products caused by multiple positioning and transfers, optimizing the production process, and improving product quality and market competitiveness.

[0045] In summary, this invention improves the efficiency of cell tab cutting and welding, enhances compatibility, improves safety, and optimizes the user experience. Each innovation significantly addresses the limitations of existing technologies and enhances them. Adapting to existing soft-pack cells for cell tab cutting and welding not only improves production efficiency but also reduces production errors through an integrated design, ensuring consistent and reliable product quality.

[0046] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended only as examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations and modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. A soft-pack battery cell tab cutting and welding integrated device, characterized in that: It includes a displacement driving member, an upper die (81), a base (4) and a lower die (51). The lower die (51) is used to place an electric core (62). A welding mechanism is installed on the upper die (81). The displacement driving member is used to drive the upper die (81) and the lower die (51) to move closer to and away from each other. Above the cutting edge of the upper die (81), there is a pole piece pressing part (811). After the pole piece is installed on the upper die (81), at least part of it is located at the position of the pole piece pressing part (811). The cutting edge of the upper die (81) engages with the lower die (51) to complete the ear cutting. When the cutting is in place, the pole piece is accurately pressed on the ear of the electric core after cutting, completing the preparation and positioning of the pole piece. The welding mechanism performs the welding of the pole piece and the ear to ensure the accuracy of welding.

2. The integrated device for cutting and welding the tabs of the soft-pack battery cell according to claim 1, wherein: A gap (812) for the pole piece to pass through is provided at the top position of the upper die (81).

3. The integrated device for cutting and welding the tabs of the soft-pack battery cell according to claim 2, wherein: A fixing member (84) is provided on the upper die (81), and the fixing member (84) is used to press and fix the pole piece to be welded.

4. The integrated device for cutting and welding the tabs of the soft-pack battery cell according to claim 3, wherein: The fixing member (84) includes a spring-type fixing piece.

5. The integrated device for cutting and welding the tabs of the pouch cell according to claim 3 or 4, wherein: An electric core positioning area is provided on the lower die (51) to ensure the accurate positioning of the electric core during the cutting and welding processes.

6. The integrated device for cutting and welding the tabs of the soft-pack battery cell according to claim 5, wherein: The electric core positioning area is composed of an area surrounded by several positioning fixing blocks (52).

7. The integrated device for cutting and welding the tabs of the soft-pack battery cell according to claim 1, wherein: The welding mechanism includes a multi-contact spot welding gun (71), and the multi-contact spot welding gun (71) is connected to a welding machine (741).

8. The integrated device for cutting and welding the tabs of the soft-pack battery cell according to claim 1, wherein: A slope (9) is provided at the rear of the base (4), and the slope (9) is used to ensure that the waste after the ear cutting of the electric core can be discharged in time and smoothly.

9. The integrated device for cutting and welding the tabs of a soft-pack battery cell according to claim 1, wherein: The displacement driving member includes a cylinder (1), and the cylinder (1) is connected to the upper die (81).

10. The integrated device for cutting and welding the tabs of the soft-pack battery cell according to claim 9, wherein: A cylinder frame (3) is provided on the base (4), a guide sleeve (21) and a guide rod (22) are provided on the cylinder frame (3), and the guide rod (22) is connected to the upper die (81).

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