Manufacturing method of battery pack for power generation and energy storage

Abstract

The invention discloses a manufacturing method of a battery pack for power generation and energy storage. The manufacturing method comprises the following steps: S1, sorting battery cells; s2, stacking the modules; s3, module welding is carried out; s4, box body pretreatment and module fixing; s5, pre-processing I is carried out; s6, pre-processing II is carried out; and S7, detecting and packaging.

Description

Technical Field

[0001] This invention relates to the field of battery pack technology, and in particular to a method for manufacturing a battery pack for power generation and energy storage. Background Technology

[0002] Photovoltaic power generation and energy storage is an important energy utilization method that converts solar energy into electrical energy through a photovoltaic power generation system and stores the generated electrical energy using specific technologies and equipment. It plays a crucial role in the entire energy system, effectively solving the problem of intermittent power supply caused by factors such as unstable sunlight intensity and day-night cycles during photovoltaic power generation, thereby ensuring a continuous and stable power supply.

[0003] Battery packs, as energy storage devices with specific functions, play a crucial role in photovoltaic power generation systems. Their primary purpose is energy storage during photovoltaic power generation. In other words, throughout the entire photovoltaic power generation process, battery packs play a key role in storing electrical energy, properly preserving the electrical energy converted from solar energy so that it can be stably output and used when needed.

[0004] To improve the manufacturing method of battery packs for power generation and energy storage, and to solve the problem of smoke filling the work area in the existing manufacturing methods, it is particularly important to design a manufacturing method for battery packs for power generation and energy storage. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a method for manufacturing a battery pack for power generation and energy storage.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a method for manufacturing a battery pack for power generation and energy storage, comprising the following steps: S1. Cell sorting: Operators remove battery cells from the sorting area and place them on the sorting equipment. The voltage parameters of the sorting equipment are set to 3.294-3.297mV, and the internal resistance parameters are controlled within the range of 0.15mΩ-0.2mΩ. After sorting, operators manually peel off the mica foam release paper from the battery cells and attach it to the large surface of the blue film on the battery cell. Then, multiple PC battery cells are pasted onto the battery cell end plates, and foam is added between the PC end plates. S2, Module Stacking: First, place the steel strip on the module stacking base plate and the module end plate on the extrusion end plate, ensuring that the holes on the end plate face upwards and the lower end of the PC sheet is tightly attached to the battery cell. Place them in the following order: end plate → PC → battery cell → mica sheet → battery cell → PC → end plate, ensuring that the direction of the battery cell terminals is not reversed and that the positive and negative terminals of adjacent battery cells are staggered. After installing the error-proof fixture, check whether the positive and negative terminal directions of the battery cells are correct, and then scan the battery cell code. Apply extrusion to the module, and control the module extrusion pressure within the range of 250-400 kg·F. Insert the lower layer steel strip into the slot of the module end plate, and then insert the upper layer steel strip into the slot of the module end plate. After releasing the extrusion end, move the module laterally to the turnover and resting bakelite board and push it into the resting area to wait for welding. S3, Module Welding: The 1P13S module is sent to the cleaning machine for cleaning. After cleaning, the operator places the module on the welding workbench of the welding device and positions it precisely. Then, the positive and negative electrode insulating bases and CCS are installed and fixed and limited by screws at both ends. The laser welding module is moved to the predetermined position above the welding workbench by the drive device to perform the welding operation. After welding, it is necessary to check for defects such as off-center welding, missing welding, false welding, weld penetration and excessive welding slag. After confirming that there are no abnormalities, it is transferred to the hoisting line. After hoisting, PC sheets are used to protect the battery cells to prevent short circuits, and the 1P13S module is installed in the PACK box that has been glued with adhesive with the help of hoisting fixtures. S4. Enclosure pretreatment and fixing module: Clean the enclosure with a vacuum cleaner and a cloth to ensure no foreign objects or aluminum shavings remain; attach PC insulation material to the fixed ends on both sides of the enclosure, ensuring the holes are aligned; place the modules into the enclosure in sequence; after the modules are in place, install and tighten the screws, use a digital torque wrench to set the torque a second time, and mark the position with a blue marker; after the copper busbars are installed, use hexagonal flange bolts to install and fix the copper busbars in the order of main positive → main negative → series copper busbars; S5, Pre-processing 1: Install the positive and negative plug-in fixing copper busbars; install the positive and negative sockets, ensuring the positive and negative plug-in positions are correct; install the MSD socket with the plug-in bayonet facing upwards; install the communication plug-in with the bayonet facing upwards; install the explosion-proof valve; install the PC sheet and insulator in sequence on the fuse adapter plate, from bottom to top: fuse adapter plate, PC sheet, insulator; finally, use a digital torque wrench to perform a secondary torque setting and mark it with a blue marker pen; S6, Pre-processing 2: Apply a sealing gasket to the battery box cover on the front panel, ensuring the holes are aligned and not misaligned; install the communication plug, paying attention to the COM1 and COM2 labels on the wire harness to prevent reverse installation; secure the fire extinguisher device with nuts; install the nozzle with screws; plug the A, B, C, D, and E ports of the data acquisition cable into the corresponding positions on the BMS interface, ensuring the wire sequence and colors match; S7. Testing and Packaging.

[0007] The welding apparatus includes: Base; A welding workbench is disposed on the upper wall of the machine base; Multiple sets of supports are disposed on the upper wall of the machine base and surround the welding worktable; A laser welding module is mounted on the upper end of multiple sets of brackets via a driving device, the driving device being configured to enable the laser welding module to move in at least the forward, backward, left, right, and up and down directions. The following is a follow-up smoking unit, which includes a smoking inlet, a first flexible tube, a filter box, and a fan; the smoking inlet is fixedly connected to the side wall of the laser welding module by a fixing clip; the smoking inlet is in fluid communication with the inlet of the filter box through the first flexible tube; the outlet of the filter box is in fluid communication with the inlet of the fan; An air curtain isolation unit includes a distributor, multiple sets of second flexible tubes, and multiple sets of air blowing boxes; the outlet of the fan is in fluid communication with the inlet of the distributor; the multiple sets of air blowing boxes are disposed on the upper wall of the base and surround the welding workbench, each air blowing box has a cavity inside, its upper wall has a narrow air blowing outlet communicating with the cavity, and its lower wall has a connection port communicating with the cavity; the multiple distribution outlets of the distributor are respectively in fluid communication with the connection port of one of the air blowing boxes through a second flexible tube.

[0008] The upper surface of the blower box is flush with the upper surface of the base.

[0009] Each of the aforementioned blower boxes has an air distribution mesh installed inside its cavity.

[0010] It also includes a drawer box; the drawer box is slidably connected to the side wall of the base, and the filter box and the fan are both located inside the drawer box.

[0011] It also includes a pipe connector; the pipe connector is fixed to the side wall of the drawer box, one end of which extends out of the drawer box and is connected to the first flexible pipe body, and the other end extends into the interior of the drawer box and is fixedly connected to the inlet of the filter box.

[0012] At least one ventilation window is provided on the side wall of the drawer box.

[0013] The filter box contains a detachably connected filter module.

[0014] The number of air blowing boxes is four, located on the front, back, left and right sides of the welding workbench respectively; the number of flow outlets of the flow divider is four.

[0015] The smoking inlet is fixed to the front wall of the laser welding module by the fixing clip.

[0016] The present invention has the following beneficial effects: This invention employs a simple and reliable manufacturing process, including cell sorting, module stacking, module welding, housing pretreatment and module fixing, pre-processing one, pre-processing two, testing, and packaging, laying a solid foundation for mass production.

[0017] The fume inlet is fixed to the front end of the movable welding module and connected to the filter unit via a flexible tube, enabling close-range real-time tracking and extraction of welding fumes. This significantly reduces the initial diffusion of fumes from the source, effectively solving the problems of delayed fume capture and low efficiency caused by the distance of existing fixed fume hoods from the welding point, and significantly improving the air cleanliness around the welding area. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the battery pack for power generation and energy storage of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 for Figure 1 A magnified view of a section at point A in the middle; Figure 4 This is a schematic cross-sectional view of the internal structure of the drawer box of the present invention; Figure 5 This is a schematic diagram of the blower box of the present invention; Figure 6 This is a cross-sectional schematic diagram of the internal structure of the blower box of the present invention.

[0019] Legend: 1. Base; 2. Welding workbench; 3. Support; 4. Air blower box; 401. Air outlet; 5. Drawer box; 6. Heat dissipation window; 7. Pipe connector; 8. First flexible tube; 9. Laser welding module; 10. Fixing clip; 11. Smoke inlet; 12. Second flexible tube; 13. Air distribution mesh; 14. Filter box; 15. Fan; 16. Diverter. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Reference Figures 2 to 6 The manufacturing method of this power generation and energy storage battery pack includes the following steps: S1. Cell sorting: Operators remove battery cells from the sorting area and place them on the sorting equipment. The voltage parameters of the sorting equipment are set to 3.294-3.297mV, and the internal resistance parameters are controlled within the range of 0.15mΩ-0.2mΩ. After sorting, operators manually peel off the mica foam release paper from the battery cells and attach it to the large surface of the blue film on the battery cell. Then, multiple PC battery cells are pasted onto the battery cell end plates, and foam is added between the PC end plates. S2, Module Stacking: First, place the steel strip on the module stacking base plate and the module end plate on the extrusion end plate, ensuring that the holes on the end plate face upwards and the lower end of the PC sheet is tightly attached to the battery cell. Place them in the following order: end plate → PC → battery cell → mica sheet → battery cell → PC → end plate, ensuring that the direction of the battery cell terminals is not reversed and that the positive and negative terminals of adjacent battery cells are staggered. After installing the error-proof fixture, check whether the positive and negative terminal directions of the battery cells are correct, and then scan the battery cell code. Apply extrusion to the module, and control the module extrusion pressure within the range of 250-400 kg·F. Insert the lower layer steel strip into the slot of the module end plate, and then insert the upper layer steel strip into the slot of the module end plate. After releasing the extrusion end, move the module laterally to the turnover and resting bakelite board and push it into the resting area to wait for welding. S3, Module Welding: The 1P13S module is sent to the cleaning machine for cleaning. After cleaning, the operator places the module on the welding workbench of the welding device and positions it precisely. Then, the positive and negative electrode insulating bases and CCS are installed and fixed and limited by screws at both ends. The laser welding module is moved to the predetermined position above the welding workbench by the drive device to perform the welding operation. After welding, it is necessary to check for defects such as off-center welding, missing welding, false welding, weld penetration and excessive welding slag. After confirming that there are no abnormalities, it is transferred to the hoisting line. After hoisting, PC sheets are used to protect the battery cells to prevent short circuits, and the 1P13S module is installed in the PACK box that has been glued with adhesive with the help of hoisting fixtures. S4. Enclosure pretreatment and fixing module: Clean the enclosure with a vacuum cleaner and a cloth to ensure no foreign objects or aluminum shavings remain; attach PC insulation material to the fixed ends on both sides of the enclosure, ensuring the holes are aligned; place the modules into the enclosure in sequence; after the modules are in place, install and tighten the screws, use a digital torque wrench to set the torque a second time, and mark the position with a blue marker; after the copper busbars are installed, use hexagonal flange bolts to install and fix the copper busbars in the order of main positive → main negative → series copper busbars; S5, Pre-processing 1: Install the positive and negative plug-in fixing copper busbars; install the positive and negative sockets, ensuring the positive and negative plug-in positions are correct; install the MSD socket with the plug-in bayonet facing upwards; install the communication plug-in with the bayonet facing upwards; install the explosion-proof valve; install the PC sheet and insulator in sequence on the fuse adapter plate, from bottom to top: fuse adapter plate, PC sheet, insulator; finally, use a digital torque wrench to perform a secondary torque setting and mark it with a blue marker pen; S6, Pre-processing 2: Apply a sealing gasket to the battery box cover on the front panel, ensuring the holes are aligned and not misaligned; install the communication plug, paying attention to the COM1 and COM2 labels on the wire harness to prevent reverse installation; secure the fire extinguisher device with nuts; install the nozzle with screws; plug the A, B, C, D, and E ports of the data acquisition cable into the corresponding positions on the BMS interface, ensuring the wire sequence and colors match; S7. Testing and packaging, resulting in the finished product as follows: Figure 1 As shown.

[0022] To achieve efficient capture of welding fumes at the source and overcome the drawbacks of delayed capture by fixed fume hoods, the welding device of this invention includes a base 1, a welding worktable 2 mounted on the upper wall of the base 1, multiple sets of supports 3 arranged around the welding worktable 2, and a laser welding module 9 mounted on the upper end of the supports 3 via a drive device. The drive device is configured to enable the laser welding module 9 to move precisely above the welding worktable 2 in at least the forward, backward, left, right, and up / down directions to complete the welding operation of the battery module. Through this structure, the laser welding module 9 possesses the ability to move freely in three-dimensional space, laying the foundation for subsequent dynamic capture of fumes.

[0023] To address the issues of the smoke inlet being far from the welding point and the smoke easily spreading before extraction in existing technologies, this invention features a follow-up smoke extraction unit. This unit includes a suction duct 11, a first flexible tube 8, a filter box 14, and a fan 15. The suction duct 11 is tightly fixed to the front wall of the laser welding module 9 (i.e., the working end near the laser output port) via a fixing clip 10. The upper outlet of the suction duct 11 is connected to the inlet of the filter box 14 via a section of the first flexible tube 8, which has good flexibility and temperature resistance; the outlet of the filter box 14 is connected to the inlet of the fan 15 via a pipe. When the laser welding module 9 moves and performs welding, the suction duct 11 moves synchronously, its suction port always remaining close to the high-temperature welding point. This allows for the immediate creation of a local negative pressure for extraction of smoke the instant it is generated, significantly reducing the time the smoke remains and spreads near the workpiece.

[0024] To further block the escaped dust that cannot be completely captured at the source and prevent its horizontal diffusion and pollution of the workshop environment, this invention further includes an air curtain isolation unit. This unit includes a distributor 16, multiple sets of second flexible tubes 12, and multiple sets of air-blowing boxes 4. The outlet of the fan 15 is in fluid communication with the inlet of the distributor 16. Multiple sets of air-blowing boxes 4 are fixedly arranged in a circular manner on the upper wall of the base 1, surrounding the welding workbench 2. Each air-blowing box 4 has a cavity inside, with a narrow, elongated air outlet 401 machined into its upper wall, and a connection port communicating with the cavity on its lower wall. Multiple outlets of the distributor 16 are each in fluid communication with a connection port on the lower wall of an air-blowing box 4 via a second flexible tube 12. Through the above structure, the air pressurized and filtered by the fan 15 is evenly distributed to each blower box 4 via the distributor 16, and finally sprayed upward from the narrow blower outlet 401, thereby forming a continuous and stable upward airflow barrier (air curtain) above the welding area.

[0025] To ensure a uniform and stable airflow in the air curtain and prevent turbulence from affecting the isolation effect, a uniform airflow mesh 13 is installed inside the cavity of each air blower box 4. The uniform airflow mesh 13 is located inside the cavity, along the airflow channel. When the airflow enters the cavity of the air blower box 4 from the connection port, it first passes through the uniform airflow mesh 13 for smoothing and equalization, making the airflow pressure and velocity more evenly distributed along the entire length of the air outlet 401. This ensures that the formed air curtain has a consistent thickness and a vertical direction, achieving optimal isolation and guidance effects.

[0026] To integrate the core components of the dust treatment system into a module, facilitating overall maintenance, replacement, or repair while maintaining the neatness of the main equipment structure, this invention also includes a drawer box 5. The drawer box 5 is slidably connected to the side wall (e.g., the left side wall) of the base 1 via a slide rail mechanism. The filter box 14 and the fan 15, as a functional module, are both fixedly installed within the internal space of the drawer box 5. With this structure, when it is necessary to replace the filter module in the filter box 14 or repair the fan 15, the entire drawer box 5 can be smoothly pulled out from the side wall of the base 1, providing ample operating space and extremely convenient maintenance.

[0027] To achieve a reliable and flexible connection between the follow-up fumigation unit and the filter box inside the drawer, and to allow the drawer to be freely pulled out without affecting the piping, this invention also includes a pipe connector 7. The pipe connector 7 is fixedly installed on the side wall of the drawer 5, with one end (outer end) extending out of the drawer 5 for insertion or sleeve connection with the first flexible tube 8 from the laser welding module 9; its other end (inner end) extends into the interior of the drawer 5 and is fixedly connected to the inlet of the filter box 14 via a flange or clamp. When the drawer 5 is pushed into the base 1, the pipe connector 7 serves as a fixed interface; when the drawer 5 is pulled out, the pipe connector 7 moves with it, and the first flexible tube 8 has sufficient flexibility and length margin to accommodate this relative movement, thereby ensuring the continuity and reliability of the air circuit connection.

[0028] To ensure the heat dissipation needs of electrical components such as the fan 15 integrated inside the drawer box 5 during long-term operation and to prevent overheating from affecting performance and lifespan, at least one heat dissipation window 6 is provided on the side wall of the drawer box 5. The heat dissipation window 6 is usually covered with a dustproof mesh. When the fan 15 is working, it generates heat, which is dissipated to the outside of the base 1 through convection through the heat dissipation window 6, effectively reducing the temperature rise of the sealed space inside the drawer box 5.

[0029] To facilitate regular cleaning or replacement of the filter material and maintain the continuous and efficient operation of the dust treatment system, a filter module (not shown in the figure, but may be a combination of pre-filter cotton, HEPA filter, etc.) is detachably connected inside the filter box 14. The filter module is typically installed inside the filter box 14 via clips, slide rails, or pressure plates. This structure allows users to easily open the filter box 14 (usually through a door or cover) to remove the saturated filter module for cleaning or replacement with a new module, ensuring the durability of the filtration effect.

[0030] To construct a complete, blind-spot-free protective air curtain around the welding workbench 2, in a preferred embodiment of the present invention, the number of air blowing boxes 4 is specifically set to four, located on the front, rear, left, and right sides of the welding workbench 2, respectively. Correspondingly, the number of diversion outlets of the diverter 16 is also set to four, with each outlet connected to an air blowing box 4 via an independent second flexible tube 12. Through this arrangement, the four air curtains generated by the four air blowing boxes 4 seamlessly connect above the welding area, forming a rectangular, closed upward airflow channel, resulting in a more thorough envelopment and guidance effect on escaping fumes.

[0031] The laser welding module 9, driven by the drive unit, moves to a predetermined position above the welding workbench 2 to perform welding operations. Simultaneously, the fan 15 starts. On one hand, the suction effect of the fan 15 creates negative pressure at the suction port of the suction tube 11, drawing the high-concentration fumes generated during welding through the first flexible tube 8 into the filter box 14 inside the drawer box 5 before they diffuse, where they are purified by the filter module. On the other hand, the clean air (or pre-purified air) discharged from the fan 15 is pressurized and sent to the distributor 16, and after being evenly distributed, it is delivered through four second flexible tubes 12 to the four air blowing boxes 4 surrounding the welding workbench 2. The airflow is evenly distributed within the air blowing boxes 4 by the air distribution mesh 13, and then ejected vertically upwards at high speed from the narrow air outlet 401, forming a three-dimensional upward air curtain surrounding the welding area. This air curtain forms a second protective barrier, effectively blocking and trapping a small amount of welding fumes that are not captured in time by the suction duct 11 or that escape due to airflow disturbance. It uses the upward momentum to guide the fumes above the equipment, and finally collects them and discharges them outdoors by the overall fresh air exhaust system at the top of the workshop. This achieves a dual and efficient treatment of welding fumes, with "source capture as the main method and air curtain isolation as a supplement," significantly improving the air quality in the work area.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for manufacturing a battery pack for power generation and energy storage, characterized in that, Includes the following steps: S1. Cell sorting: Operators remove battery cells from the sorting area and place them on the sorting equipment. The voltage parameters of the sorting equipment are set to 3.294-3.297mV, and the internal resistance parameters are controlled within the range of 0.15mΩ-0.2mΩ. After sorting, operators manually peel off the mica foam release paper from the battery cells and attach it to the large surface of the blue film on the battery cell. Then, multiple PC battery cells are pasted onto the battery cell end plates, and foam is added between the PC end plates. S2, Module Stacking: First, place the steel strip on the module stacking base plate and the module end plate on the extrusion end plate, ensuring that the holes on the end plate face upwards and that the lower end of the PC sheet is tightly attached to the battery cell; place them in the order of end plate → PC → battery cell → mica sheet → battery cell → PC → end plate, ensuring that the direction of the battery cell terminals is not reversed and that the positive and negative terminals of adjacent battery cells are staggered; after installing the error-proof fixture, check whether the positive and negative terminal directions of the battery cells are correct, and then scan the battery cell code; Apply extrusion to the module, with the extrusion pressure controlled within the range of 250-400 kg·F; insert the lower steel strip into the end plate slot of the module, and then insert the upper steel strip into the end plate slot of the module; after releasing the extrusion end, move the module laterally to the turnover and static bakelite board, and push it into the static area to wait for welding. S3, Module Welding: The 1P13S module is sent to the cleaning machine for cleaning. After cleaning, the operator places the module on the welding workbench of the welding device and positions it precisely. Then, the positive and negative electrode insulating bases and CCS are installed and fixed and limited by screws at both ends. The laser welding module is moved to the predetermined position above the welding workbench by the drive device to perform the welding operation. After welding, it is necessary to check for defects such as off-center welding, missing welding, false welding, weld penetration and excessive welding slag. After confirming that there are no abnormalities, it is transferred to the hoisting line. After hoisting, PC sheets are used to protect the battery cells to prevent short circuits, and the 1P13S module is installed in the PACK box that has been glued with adhesive with the help of hoisting fixtures. S4. Enclosure pretreatment and fixing module: Clean the enclosure with a vacuum cleaner and a cloth to ensure no foreign objects or aluminum shavings remain; attach PC insulation material to the fixed ends on both sides of the enclosure, ensuring the holes are aligned; place the modules into the enclosure in sequence; after the modules are in place, install and tighten the screws, use a digital torque wrench to set the torque a second time, and mark the position with a blue marker; after the copper busbars are installed, use hexagonal flange bolts to install and fix the copper busbars in the order of main positive → main negative → series copper busbars; S5, Pre-processing 1: Install the positive and negative plug-in fixing copper busbars; install the positive and negative sockets, ensuring the positive and negative plug-in positions are correct; install the MSD socket with the plug-in bayonet facing upwards; install the communication plug-in with the bayonet facing upwards; install the explosion-proof valve; install the PC sheet and insulator in sequence on the fuse adapter plate, from bottom to top: fuse adapter plate, PC sheet, insulator; finally, use a digital torque wrench to perform a secondary torque setting and mark it with a blue marker pen; S6, Pre-processing 2: Apply a sealing gasket to the battery box cover on the front panel, ensuring the holes are aligned and not misaligned; install the communication plug, paying attention to the COM1 and COM2 labels on the wire harness to prevent reverse installation; secure the fire extinguisher device with nuts; install the nozzle with screws; plug the A, B, C, D, and E ports of the data acquisition cable into the corresponding positions on the BMS interface, ensuring the wire sequence and colors match; S7. Testing and Packaging.

2. The method for manufacturing a battery pack for power generation and energy storage according to claim 1, characterized in that: The welding apparatus includes: Base (1); A welding workbench (2) is disposed on the upper wall of the machine base (1); Multiple sets of supports (3) are provided on the upper wall of the base (1) and surround the welding workbench (2); A laser welding module (9) is mounted on the upper end of multiple sets of brackets (3) via a drive device, the drive device being configured to enable the laser welding module (9) to move in at least the forward, backward, left, right and up directions; The following smoking unit includes a smoking inlet (11), a first flexible tube (8), a filter box (14), and a fan (15); the smoking inlet (11) is fixedly connected to the side wall of the laser welding module (9) by a fixing clip (10); the smoking inlet (11) is in fluid communication with the inlet of the filter box (14) through the first flexible tube (8); the outlet of the filter box (14) is in fluid communication with the inlet of the fan (15); The air curtain isolation unit includes a distributor (16), multiple sets of second flexible tubes (12), and multiple sets of air blowing boxes (4); the outlet of the fan (15) is in fluid communication with the inlet of the distributor (16); the multiple sets of air blowing boxes (4) are disposed on the upper wall of the base (1) and surround the welding workbench (2), each air blowing box (4) has a cavity inside, its upper wall has a narrow air blowing outlet (401) that communicates with the cavity, and its lower wall has a connection port that communicates with the cavity; the multiple distribution outlets of the distributor (16) are respectively in fluid communication with the connection port of one air blowing box (4) through a second flexible tube (12).

3. The method for manufacturing a battery pack for power generation and energy storage according to claim 2, characterized in that: The upper surface of the blower box (4) is flush with the upper surface of the base (1).

4. The method for manufacturing a battery pack for power generation and energy storage according to claim 3, characterized in that: Each of the blower boxes (4) is provided with a uniform air mesh (13) inside its cavity.

5. The method for manufacturing a battery pack for power generation and energy storage according to claim 2, characterized in that: It also includes a drawer box (5); the drawer box (5) is slidably connected to the side wall of the base (1), and the filter box (14) and the fan (15) are both located inside the drawer box (5).

6. The method for manufacturing a battery pack for power generation and energy storage according to claim 5, characterized in that: It also includes a pipe connector (7); the pipe connector (7) is fixed to the side wall of the drawer box (5), one end of which extends out of the outside of the drawer box (5) and is connected to the first flexible tube (8), and the other end extends into the inside of the drawer box (5) and is fixedly connected to the inlet of the filter box (14).

7. The method for manufacturing a battery pack for power generation and energy storage according to claim 5, characterized in that: At least one ventilation window (6) is provided on the side wall of the drawer box (5).

8. The method for manufacturing a battery pack for power generation and energy storage according to claim 2, characterized in that: The filter box (14) has a filter module detachably connected inside.

9. The method for manufacturing a battery pack for power generation and energy storage according to claim 2, characterized in that: The number of blower boxes (4) is four, located on the front, back, left and right sides of the welding workbench (2); the number of diversion outlets of the diverter (16) is four.

10. The method for manufacturing a battery pack for power generation and energy storage according to claim 2, characterized in that: The smoking inlet (11) is fixed to the front wall of the laser welding module (9) by the fixing clip (10).

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