A battery module assembly line

Abstract

This invention provides a battery module assembly line, comprising: a feeding device, an adhesive coating device, a box-loading device, a busbar welding device, a first welding inspection device, an FPC welding device, a second welding inspection device, and a performance inspection device arranged sequentially along the processing direction; the feeding device is used for feeding battery boxes; the adhesive coating device is used for spraying adhesive onto the peripheral walls of each battery box; the box-loading device is used for moving battery cells to the glued battery boxes and stacking them into groups; the busbar welding device is used for welding busbars to the battery modules; the FPC welding device is used for welding FPC boards to the battery modules; and the performance inspection device is used for inspecting the performance of the assembled battery modules. The battery module assembly line provided by this invention can achieve automated operation, with each process arranged sequentially, which can greatly reduce manual operation, lower labor intensity, improve production efficiency, and enhance product consistency and reliability.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, and more particularly to a battery module assembly line. Background Technology

[0002] In today's increasingly fierce energy competition, finding alternatives to petroleum energy has become a consensus. The vigorous development of the battery industry is a key trend, with wide applications in industrial production and daily life; electric buses in cities have already quietly begun operation. The battery cell is a crucial component of a battery; batteries are first assembled into modules, and then the modules are packaged together.

[0003] The assembly process of battery modules is quite complex, involving multiple steps such as cell coating, stacking, and welding. Currently, most companies have not yet achieved automated production lines, relying mainly on manual operation with machine assistance. The operation steps are scattered, resulting in high labor intensity, low production efficiency, and high production costs. Furthermore, the manual inspection of assembled products leads to poor product consistency, seriously affecting battery reliability. Summary of the Invention

[0004] This invention provides a battery module assembly production line to solve problems such as low production efficiency, high production cost, and poor product consistency in existing battery module assembly processes, which seriously affect the reliability and aesthetics of the battery.

[0005] This invention provides a battery module assembly production line, comprising:

[0006] The feeding device, gluing device, box-entry device, busbar welding device, first welding inspection device, FPC welding device, second welding inspection device and performance inspection device are arranged sequentially along the processing direction;

[0007] The feeding device is used for feeding battery boxes; the adhesive application device is used for spraying adhesive onto the perimeter walls of each battery box; the box-loading device is used for moving the battery cells to the glued battery boxes and stacking them into groups; the busbar welding device is used for welding the busbars to the battery modules; the first welding inspection device is used for inspecting the battery modules with welded busbars; the FPC welding device is used for welding FPC boards to the battery modules; the second welding inspection device is used for inspecting the battery modules with welded FPC boards; and the performance testing device is used for inspecting the performance of the assembled battery modules.

[0008] According to an embodiment of the present invention, a battery module assembly production line is provided, wherein the performance testing device includes:

[0009] A charge / discharge testing mechanism is used to perform charge / discharge testing on battery modules after assembly.

[0010] Battery safety testing organizations are used to conduct safety tests on assembled battery modules.

[0011] The BMS testing facility is used to perform BMS testing on the assembled battery modules.

[0012] The auxiliary function testing unit is used to perform auxiliary function tests on the assembled battery module.

[0013] According to an embodiment of the present invention, a battery module assembly production line is provided, wherein the bus welding device is used to weld the bus onto a first welding point of the battery module, comprising:

[0014] A smoke extraction box, wherein a first smoke extraction cavity is formed inside the smoke extraction box;

[0015] The first pressure head assembly includes a first pressure head and a first elastic element; the first pressure head is connected to the bottom of the smoke extraction box through the first elastic element, a first through hole is formed in the first pressure head and is opposite to the first smoke extraction cavity, a first pressure relief groove is provided on the bottom wall of the first pressure head, and a plurality of first air inlets are provided on the peripheral wall of the first pressure head, the first through hole is connected to the first air inlets, and the airflow ejected from the first air inlets acts on the first welding point;

[0016] A first laser is disposed opposite to the first smoke extraction cavity. The beam emitted by the first laser passes through the first smoke extraction cavity and the first through hole in sequence to weld the first welding point.

[0017] A first pressure sensor is used to detect the pressure between the first pressure head and the smoke extraction box;

[0018] During the movement of the smoke extraction box, when the first elastic element is in a compressed state, both ends of the first pressure head abut against the smoke extraction box and the manifold, and the first smoke extraction cavity is connected to the first through hole; when the first elastic element is in a stretched state, both ends of the first pressure head separate from the smoke extraction box and the manifold, and the first smoke extraction cavity separates from the first through hole.

[0019] According to an embodiment of the present invention, in a battery module assembly production line, the first pressure head includes an outer peripheral wall and an inner peripheral wall coaxially arranged, an airflow channel is formed between the outer peripheral wall and the inner peripheral wall, the first air inlet is connected to the airflow channel, and the airflow channel sprays airflow circumferentially toward the first welding point.

[0020] According to an embodiment of the present invention, the busbar welding device further includes a smoke extraction pipe disposed at the bottom of the smoke extraction box, the smoke extraction pipe communicating with the first smoke extraction cavity, and the smoke extraction pipe being disposed opposite to the through hole.

[0021] When the first elastic element is in a compressed state, both ends of the first pressure head abut against the smoke extraction pipe and the manifold, respectively, and the smoke extraction pipe is connected to the first through hole; when the first elastic element is in a compressed state, both ends of the first pressure head are separated from the smoke extraction pipe and the manifold, and the smoke extraction pipe is separated from the first through hole.

[0022] According to an embodiment of the present invention, a battery module assembly production line is provided, wherein the FPC welding device is used to weld the FPC board to a second welding point of the battery module, comprising:

[0023] The smoke hood has a second smoke extraction chamber inside and an opening at the bottom.

[0024] The second pressure head assembly includes a second pressure head and a second elastic element disposed in the second smoking chamber; the second pressure head is connected to the top of the second smoking chamber through the second elastic element, a second through hole is formed in the second pressure head, a second pressure relief groove is provided on the bottom wall of the second pressure head, and a second air inlet for filling protective gas is provided on the pressure head, the second through hole is connected to the second air inlet, and the airflow ejected from the second air inlet acts on the second welding point;

[0025] The second laser is disposed opposite to the second smoke extraction cavity. The laser emitted by the second laser passes through the second smoke extraction cavity and the second through hole in sequence to weld the second welding point.

[0026] The second pressure sensor is used to detect the pressure between the second pressure head and the FPC plate;

[0027] When the second elastic element is in a compressed state, the second pressure head is located inside the second smoke extraction chamber, the FPC board abuts against the opening, and the side wall of the smoke extraction hood forms a clearance space for the components on the FPC board to fit together; when the second elastic element is in a stretched state, the second pressure head passes through the opening and is located outside the second smoke extraction chamber, and the FPC board separates from the opening.

[0028] According to an embodiment of the present invention, a battery module assembly production line includes a fume hood comprising:

[0029] The top plate and multiple side plates are arranged sequentially on the side of the top plate. The multiple side plates surround the bottom surface of the top plate to form the second smoke extraction cavity. The side plates are slidable relative to the top plate in the height direction. The side plates that are not in contact with the FPC plate slide downward to the lowest point, and the side plates that are in contact with the FPC plate slide upward accordingly.

[0030] According to an embodiment of the present invention, the battery module assembly production line further includes a smoke extraction device and a filter device, wherein the first smoke extraction chamber and the second smoke extraction chamber are both connected to the filter device through the smoke extraction device, and the filter device is connected to the first air inlet and the second air inlet.

[0031] According to an embodiment of the present invention, the battery module assembly production line includes a box-loading device comprising a pressing mechanism and a feeding mechanism.

[0032] The feeding mechanism is used to move the battery cells to the battery box after the adhesive has been applied, and the pressing mechanism is used to press and stack the battery cells into a group.

[0033] According to an embodiment of the present invention, a battery module assembly production line is provided, wherein the adhesive coating device includes:

[0034] Mounting base;

[0035] A glue applicator has a glue outlet, and one end of the glue applicator away from the glue outlet is oscillatingly or rotatably mounted on the mounting base;

[0036] The glue application drive mechanism is used to drive the glue application machine to swing or rotate, and to spray glue onto the peripheral wall of the battery box.

[0037] The battery module assembly line provided by this invention includes a feeding device, an adhesive coating device, a box-loading device, a busbar welding device, a first welding inspection device, an FPC welding device, a second welding inspection device, and a performance testing device. The feeding device is used to feed battery boxes; the adhesive coating device sprays adhesive onto the perimeter of each battery box; the box-loading device moves the battery cells to the glued battery boxes for stacking; the busbar welding device welds the busbars to the battery modules; the first welding inspection device inspects the battery modules with welded busbars; the FPC welding device welds FPC boards to the battery modules; the second welding inspection device inspects the battery modules with welded FPC boards; and the performance testing device tests the performance of the assembled battery modules. This automated operation, with each process sequentially and orderly arranged, significantly reduces manual operation, lowers labor intensity, improves production efficiency, and enhances product consistency and reliability. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1This is a schematic diagram of a battery module assembly production line provided in an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of a performance testing device provided in an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of a busbar welding device provided in an embodiment of the present invention;

[0042] Figure 4 This is a front view of the first pressure head provided in an embodiment of the present invention;

[0043] Figure 5 yes Figure 4 Schematic diagram of section AA;

[0044] Figure 6 This is a top view of the first pressure head provided in an embodiment of the present invention;

[0045] Figure 7 This is a three-dimensional structural schematic diagram of the first pressure head provided in an embodiment of the present invention;

[0046] Figure 8 This is a schematic diagram of the first pressure head provided in another embodiment of the present invention;

[0047] Figure 9 This is a schematic diagram of an FPC welding apparatus provided in an embodiment of the present invention from one perspective;

[0048] Figure 10 This is a schematic diagram from another perspective of an embodiment of the FPC welding apparatus provided by the present invention;

[0049] Figure 11 This is a three-dimensional structural schematic diagram of the second pressure head assembly provided in an embodiment of the present invention;

[0050] Figure 12 This is a front view of a second pressure head assembly provided in an embodiment of the present invention;

[0051] Figure 13 This is a schematic diagram of an adhesive application apparatus provided in an embodiment of the present invention;

[0052] Figure 14 This is a schematic diagram of an adhesive applicator provided in an embodiment of the present invention;

[0053] Figure label:

[0054] 1. Feeding device; 2. Glue application device; 21. Mounting base; 22. Glue application machine; 220. Glue outlet; 23. Glue application drive mechanism; 3. Box entry device; 4. Busbar welding device; 410. Smoke box; 4100. First through hole; 420. First pressure head assembly; 4200. First pressure head; 4201. First elastic element; 4202. First pressure relief groove; 4203. First air inlet; 4204. First air inlet pipe; 42001. Outer peripheral wall; 42002. Inner peripheral wall; 42003. Airflow channel; 430. Smoke extraction pipe; 440. First insulating plate; 450. First drive mechanism; 460. First position sensor; 470. First row 5. Smoke pipe; 6. First welding inspection device; 7. FPC welding device; 8. Smoke hood; 9. Top plate; 10. Side plate; 11. Second pressure head assembly; 12. Second pressure head; 13. Second through hole; 24. Second elastic element; 15. Second pressure relief groove; 16. Second exhaust pipe; 17. Second drive mechanism; 18. Frame; 19. Second insulating plate; 20. Second position sensor; 20. Second welding inspection device; 21. Performance testing device; 22. Charge and discharge testing mechanism; 23. Battery safety testing mechanism; 34. BMS testing mechanism; 55. Auxiliary function testing mechanism. Detailed Implementation

[0055] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0056] In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] This invention provides a battery module assembly production line, such as... Figure 1 As shown, it includes: a feeding device 1, an adhesive application device 2, a box-entry device 3, a busbar welding device 4, a first welding inspection device 5, an FPC welding device 6, a second welding inspection device 7, and a performance inspection device 8 arranged sequentially along the processing direction.

[0058] The battery packing device 1 is used for loading battery boxes, which can be done using a robotic arm or conveyor line. The adhesive application device 2 applies adhesive to the perimeter of each battery box, and the box-loading device 3 moves the battery cells to the adhesive-coated battery boxes for stacking. The busbar welding device 4 welds the busbars to the battery modules. The first welding inspection device 5 inspects the battery modules with welded busbars. The FPC welding device 6 welds the FPC board to the battery modules; the second welding inspection device 7 inspects the battery modules with welded FPC boards. The performance testing device 8 tests the performance of the assembled battery modules.

[0059] During the battery module assembly line operation, the battery box and cell fixing components are first loaded by the loading device 1. After loading, the adhesive applicator 2 uses a three-dimensional sliding gun head to spray adhesive onto the periphery of each battery box while ensuring the three-dimensional sliding or oscillating of the adhesive applicator. After the battery box is coated with adhesive, the loading device 3 moves the cells to the coated battery boxes and stacks them into groups. At the same time, the loading device 3 can use a lifting pressure head to press the cells tightly, so that the periphery of the cells is firmly bonded to the periphery of the box. Then, the busbars are loaded and welded to the battery modules using the busbar welding device 4. After the busbar welding is completed, the first welding inspection device 5 is used to inspect the battery modules with welded busbars to check the welding effect of the busbars. If the inspection result is normal, the FPC board is loaded and welded to the battery modules using the FPC welding device 6. Then, the second welding inspection device 7 is used to inspect the battery modules with welded FPC boards. If the test results are normal, the performance of the assembled battery module is tested using the performance testing device 8. If any of the first welding testing device 5, the second welding testing device 7, and the performance testing device 8 detects that the battery module is abnormal, the NG (non-performing) battery cell module can be directly removed from the production line.

[0060] The battery module assembly line provided by this invention includes a feeding device, an adhesive coating device, a box-loading device, a busbar welding device, a first welding inspection device, an FPC welding device, a second welding inspection device, and a performance testing device. The feeding device is used to feed battery boxes; the adhesive coating device sprays adhesive onto the perimeter of each battery box; the box-loading device moves the battery cells to the glued battery boxes for stacking; the busbar welding device welds the busbars to the battery modules; the first welding inspection device inspects the battery modules with welded busbars; the FPC welding device welds FPC boards to the battery modules; the second welding inspection device inspects the battery modules with welded FPC boards; and the performance testing device tests the performance of the assembled battery modules. This automated operation, with each process sequentially and orderly arranged, significantly reduces manual operation, lowers labor intensity, improves production efficiency, and enhances product consistency and reliability.

[0061] like Figure 2 As shown, the performance testing device 8 includes: a charge / discharge testing mechanism 81, a battery safety testing mechanism 82, a BMS (Battery Management System) testing mechanism 83, and an auxiliary function testing mechanism 84.

[0062] In this embodiment, the charge / discharge testing mechanism 81 is used to perform charge / discharge testing on the assembled battery module. The battery safety testing mechanism 82 is used to perform safety testing on the assembled battery module to determine the specifications maintained and complied with in the design of the battery module. The BMS testing mechanism 83 is used to perform BMS testing on the assembled battery module to detect the specific parameters corresponding to the battery module. The auxiliary function testing mechanism 84 is used to perform auxiliary function testing on the assembled battery module, such as detecting parameters like current or voltage when the cell module is working.

[0063] Based on the above embodiments, such as Figures 3 to 8 As shown, the busbar welding device 4 is used to weld the busbar to the welding point of the battery module, and includes: a smoke extraction box 410, a first pressure head assembly 420, a first laser, and a first pressure sensor.

[0064] The smoke extraction box 410 contains a smoke extraction chamber, which can be connected to an external smoke extraction device or have a smoke extraction device installed directly within it, thereby creating negative pressure within the chamber. The first pressure head assembly 420 mainly includes a first pressure head 4200 and a first elastic element 4201. The first pressure head 4200 acts directly on the manifold to press it. In this embodiment, the first pressure head 4200 is connected to the bottom of the smoke extraction box 410 via the first elastic element 4201. The first elastic element 4201 can be a spring or a sheet spring, and one or more can be provided according to user needs. To ensure balanced pressure on the manifold, when multiple first elastic elements 4201 are provided, they are symmetrically arranged along the welding points of the manifold.

[0065] To facilitate busbar welding, a first through hole 4100 is formed inside the first pressure head 4200, which is opposite to the fume extraction chamber. A first pressure relief groove 4202 is provided on the bottom wall of the first pressure head 4200, and multiple first air inlets 4203 for injecting protective gas are provided on the peripheral wall of the first pressure head 4200. The first through hole 4100 is connected to the first air inlets, so that the airflow (protective gas) ejected from the first air inlets acts on the welding point. The first laser is positioned opposite to the fume extraction chamber, and the beam emitted by the first laser passes through the fume extraction chamber and the first through hole 4100 in sequence to weld the welding point. That is, the light output port of the first laser is aligned with the welding point through the fume extraction chamber and the first through hole 4100.

[0066] In order to absorb fumes only near the welding point during the welding process, the busbar welding device is also equipped with a first pressure sensor, which is located between the top of the fume extraction box 410 and the first pressure head 4200. The first pressure sensor is used to detect the pressure between the first pressure head 4200 and the fume extraction box 410.

[0067] During the movement of the fume extraction box 410, the first pressure sensor detects the pressure between the first pressure head 4200 and the fume extraction box 410. When the first elastic element 4201 is in a compressed state and the pressure reaches the preset pressure, it indicates that the first pressure head 4200 has successfully docked with the fume extraction box 410. Both ends of the first pressure head 4200 are in contact with the fume extraction box 410 and the manifold. The fume extraction chamber is connected to the first through hole 4100, thereby controlling the laser head welding. The negative pressure in the fume extraction box 410 absorbs the smoke and dust near the welding point, and protective gas is injected into the welding point through the first air inlet 4203. At this time, the protective gas can enter the fume extraction chamber through the first through hole 4100 under the action of negative pressure, and is discharged along with the smoke and dust.

[0068] When the first elastic element 4201 is in a stretched state, if the pressure does not reach the preset pressure, the two ends of the first pressure head 4200 are separated from the fume extraction box 410 and the manifold, and the fume extraction chamber is separated from the first through hole 4100. This allows the first laser to be controlled to stop welding and to stop fume extraction near the welding point, while also stopping the blowing of protective gas.

[0069] The busbar welding device provided in this embodiment of the invention, during the movement of the fume extraction box, is detected by a first pressure sensor. When the first elastic element is in a compressed state, both ends of the first pressure head abut against the fume extraction box and the busbar, and the fume extraction chamber is connected to the first through hole, thereby controlling the laser head welding and utilizing the negative pressure in the fume extraction box to absorb smoke and dust near the welding point. When the first elastic element is in a stretched state, both ends of the first pressure head separate from the fume extraction box and the busbar, and the fume extraction chamber separates from the first through hole, thereby controlling the first laser to stop welding and stopping the extraction of smoke near the welding point.

[0070] It should be noted that, according to user needs, a first pressure sensor can also be added and set at the bottom of the first pressure head 4200. In this case, the first pressure sensor is used to detect the pressure between the first pressure head 4200 and the manifold.

[0071] During the movement of the fume extraction box 410, the first pressure sensor detects the pressure between the first pressure head 4200 and the manifold. When the first elastic element 4201 is compressed and the pressure reaches the preset pressure, it indicates that the first pressure head 4200 and the manifold are in position, with both ends of the first pressure head 4200 contacting the fume extraction box 410 and the manifold. The fume extraction chamber is connected to the first through hole 4100, thereby controlling the laser head welding. The negative pressure in the fume extraction box absorbs the smoke and dust near the welding point, and protective gas is injected into the welding point through the first air inlet. The preset pressure can be adjusted to ensure that the first pressure head presses firmly against the manifold, preventing the manifold from shifting during welding.

[0072] When the first elastic element 4201 is in a stretched state, if the pressure does not reach the preset pressure, it means that the first pressure head 4200 has not yet been in place. The two ends of the first pressure head 4200 are separated from the fume extraction box 410 and the manifold, and the fume extraction chamber is separated from the first through hole 4100. This allows the first laser to be controlled to stop welding and to stop fume extraction near the welding point, while also stopping the blowing of protective gas.

[0073] This invention provides a busbar welding device, such as... Figure 3 and Figure 8 As shown, the first pressure head 4200 includes an outer peripheral wall 42001 and an inner peripheral wall 42002 arranged coaxially. An airflow channel 42003 is formed between the outer peripheral wall 42001 and the inner peripheral wall 42002. One side of the airflow channel 42003 is connected to the first air inlet 4203. At the same time, the bottom of the airflow channel 42003 is provided with an annular outlet, so that the airflow channel 42003 can spray airflow around the welding point.

[0074] In this embodiment, the upper sides of the inner peripheral wall 42002 and the outer peripheral wall 42001 are connected to form an upper sealed airflow channel 42003. The bottom of the airflow channel 42003 is provided with an annular outlet. The protective gas sprayed by the airflow channel 42003 is along the circumference of the welding point, so that during the welding process of the first laser, the airflow sprayed by the airflow channel 42003 can form protection near the welding point.

[0075] Furthermore, the bottom of the inner peripheral wall 42002 is a wedge-shaped surface. The wedge-shaped surface is inclined downward from the outer wall of the inner peripheral wall 42002 towards its inner wall. By setting the bottom of the inner peripheral wall 42002 as a wedge, it can be used to guide the protective gas, adjust the flow direction of the protective gas outflow channel 42003, and make the protective gas spray airflow circumferentially towards the welding point.

[0076] This invention provides a busbar welding device, such as... Figures 3 to 8 As shown, the peripheral wall of the first pressure head 4200 is provided with a plurality of spaced first air inlets 4203. The first through hole 4100 is connected to each of the first air inlets 4203. The airflow ejected from each of the first air inlets 4203 acts on the welding point. The angle between the beam emitted by the first laser and the airflow is an acute angle (greater than 0 degrees and less than 90 degrees). The acute angle is set so that the airflow is ejected toward the welding point.

[0077] When multiple first air inlets 4203 are provided, multiple first air inlets 4204 can also be provided accordingly. Multiple first air inlets 4204 are inclined downward on the inner wall of the first pressure head. Each first air inlet 4204 is connected to each first air inlet 4203 respectively, so that the air outlet of each first air inlet 4204 acts on the welding point. By providing the first air inlet 4204, the direct blowing of protective gas on the laser can be effectively avoided.

[0078] Meanwhile, the first through hole 4100 has a large diameter end and a small diameter end. The large diameter end of the first through hole 4100 is located on the side of the first pressure head close to the smoke box 410, and the small diameter end of the first through hole 4100 is located on the side of the first pressure head 4200 away from the smoke box 410.

[0079] When the first elastic element 4201 is in a compressed state, and the pressure reaches the preset pressure, it indicates that the first pressure head 4200 has completed docking with the fume extraction box 410. Both ends of the first pressure head 4200 are in contact with the fume extraction box 410 and the manifold. The fume extraction chamber is connected to the first through hole 4100, thereby controlling the laser head welding and utilizing the negative pressure in the fume extraction box 410 to absorb smoke and dust near the welding point. Protective gas is then injected into the welding point through the first air inlet. By changing the size of both ends of the first through hole 4100, the smaller diameter end of the first through hole 4100 creates greater resistance as the protective gas flows through the first air inlet 4203. Most of the protective gas, after flowing towards the welding point, is discharged from the larger diameter end of the first through hole 4100. Under negative pressure, the protective gas can enter the fume extraction chamber through the larger diameter end of the first through hole 4100, cooperating with the smoke and dust for emission.

[0080] To facilitate the connection of the large-diameter end of the first through hole 4100, the busbar welding device further includes: a smoke extraction pipe 430 and a first exhaust pipe 470. The first exhaust pipe 470 is connected to the smoke extraction box, and one end of the first exhaust pipe 470 is connected to the first smoke extraction cavity. The smoke extraction pipe 430 is located on one side of the smoke extraction box 410, and the smoke extraction pipe 430 is connected to the smoke extraction cavity, and the smoke extraction pipe 430 is positioned opposite to the first through hole 4100.

[0081] During the movement of the fume extraction box 410, the first pressure sensor detects the pressure between the first pressure head 4200 and the fume extraction box 410. When the first elastic element 4201 is in a compressed state and the pressure reaches the preset pressure, it indicates that the first pressure head 4200 has completed docking with the fume extraction pipe 430. The two ends of the first pressure head are in contact with the fume extraction pipe and the manifold, respectively. The fume extraction pipe 430 is docked with the first through hole 4100, thereby controlling the laser head welding. The negative pressure in the fume extraction box 410 absorbs the smoke and dust near the welding point, and protective gas is injected into the welding point through the first air inlet 4203. At this time, the protective gas can enter the fume extraction cavity through the first through hole under the action of negative pressure, and is discharged together with the smoke and dust.

[0082] When the first elastic element 4201 is in a stretched state, and the pressure has not reached the preset pressure, both ends of the first pressure head 4200 separate from the smoke extraction pipe 430 and the manifold, and the smoke extraction pipe 430 separates from the first through hole 4100. This allows the first laser to be controlled to stop welding, stop smoke extraction near the welding point, and stop blowing in the protective gas.

[0083] To facilitate the connection between the smoke extraction pipe 430 and the manifold, in this embodiment, the top of the first pressure head 4200 is constructed with a first positioning groove for matching the smoke extraction pipe 430, and the bottom of the first pressure head 4200 is constructed with a second positioning groove for matching the manifold. The two ends of the first through hole 4100 are respectively located in the first positioning groove and the second positioning groove.

[0084] When the first elastic element 4201 is in a compressed state, the first positioning groove connects with the smoke extraction pipe 430, and the second positioning groove abuts against the manifold. This allows for control of the laser head welding, and the negative pressure in the smoke extraction box 410 absorbs the smoke and dust near the welding point. Protective gas is then introduced into the welding point through the first air inlet 4203. At this time, the protective gas can enter the smoke extraction chamber through the first through hole under the action of negative pressure, and is discharged together with the smoke and dust.

[0085] When the first elastic element 4201 is in a compressed state, the first positioning groove separates from the fume extraction pipe 430, and the second positioning groove separates from the busbar. This allows the first laser to be controlled to stop welding, stop fume extraction near the welding point, and stop blowing in the protective gas.

[0086] Based on the above embodiments, in one embodiment provided by the present invention, as follows: Figures 3 to 8 As shown, the bottom peripheral wall of the first pressure head is provided with multiple spaced-apart first pressure relief grooves 4202, each of which is connected to the first through hole 4100. The number and shape of the first pressure relief grooves 4202 can be adjusted according to the magnitude of the negative pressure and the structure of the manifold. By setting the first pressure relief grooves 4202 to relieve pressure, when a negative pressure is formed in the first through hole 4100 of the first pressure head 4200, the connection between the first pressure head 4200 and the manifold is avoided after the first pressure head 4200 is pressed down, making it easier for the user to separate the pressure head from the manifold.

[0087] Based on the above embodiments, in one embodiment provided by the present invention, as follows: Figures 3 to 8As shown, the busbar welding device also includes a first insulating plate 440. The first insulating plate 440 can be made of rubber or other insulating materials. The first insulating plate 440 is connected between the fume extraction box 410 and the first elastic member 4201. The first insulating plate 440 has a mounting hole communicating with the fume extraction cavity. One end of the fume extraction pipe 430 passes through the mounting hole. The first pressure head 4200 is connected to the fume extraction box 410 sequentially through the first elastic member and the first insulating plate. Thus, both the first pressure head 4200 and the first elastic member 4201 are connected to the fume extraction box 410 through the first insulating plate 440, preventing the first pressure head 4200 and the first elastic member 4201 from becoming electrified during the welding process and affecting the welding.

[0088] In addition, the busbar welding device also includes a first drive mechanism 450, which is connected to one side of the smoke extraction box 410 and is used to drive the smoke extraction box to move.

[0089] The first driving mechanism includes a first displacement device and a second displacement device. Both the first and second displacement devices can be lead screws. The first displacement device has a first mounting plate that is slidable along the Z-axis. The second displacement device is mounted on the first mounting plate and has a second mounting plate that is slidable along the X-axis. A smoke extraction box 410 is mounted on the second mounting plate.

[0090] During operation, by setting two displacement devices, the first displacement device can adjust the height of the smoke extraction box 410, thereby adjusting the relative height of the first pressure head 4200 and the manifold, while the second displacement device can adjust the horizontal position of the smoke extraction box, thereby adjusting the corresponding position of the first pressure head 4200 and the manifold, so that the first pressure head 4200 can be aligned with the manifold.

[0091] Correspondingly, the busbar welding device also includes: a first position sensor 460, which may be a vision sensor. The first position sensor 460 is set on the smoke box 410 or other structures. The first position sensor 460 is used to detect the position of the busbar so that the first pressure head 4200 can be aligned with the busbar and weld the busbar to the welding point of the battery module.

[0092] During operation, the first position sensor 460 detects the position of the manifold and first controls the second displacement device to align the first pressure head 4200 with the manifold. Then, the first displacement device controls the relative height between the first pressure head 4200 and the manifold. As the fume extraction box 410 moves along the height direction, the first pressure sensor detects the pressure between the first pressure head 4200 and the fume extraction box 410. When the first elastic element 4201 is in a compressed state and the pressure reaches the preset pressure, it indicates that the first pressure head 4200 has completed docking with the fume extraction pipe 430. The two ends of the first pressure head 4200 are in contact with the fume extraction pipe 430 and the manifold, respectively. The fume extraction pipe 430 is docked with the first through hole 4100, thereby controlling the laser head welding. The negative pressure in the fume extraction box 410 absorbs the smoke and dust near the welding point, and protective gas is injected into the welding point through the first air inlet 4203. At this time, the protective gas can enter the smoke extraction chamber through the first through hole 4100 under the action of negative pressure, and be discharged together with the smoke.

[0093] like Figures 9 to 12 As shown, the FPC welding device 6 is used to weld the FPC board to the welding point of the battery module. The FPC welding device 6 includes: a fume hood 6100, a second pressure head assembly 6200, a second laser, and a second pressure sensor.

[0094] The fume hood 6100 has a hollow structure, and a second fume extraction chamber is formed inside the fume hood 6100. The bottom of the fume hood 6100 has an opening that communicates with the second fume extraction chamber. This second fume extraction chamber can be connected to an external fume extraction device, or a fume extraction device can be directly installed in the second fume extraction chamber, thereby creating a negative pressure in the second fume extraction chamber. The second pressure head assembly 6200 mainly includes a second pressure head 6201 and a second elastic element 6202. The second pressure head 6201 acts directly on the FPC board to press it. The second pressure head 6201 is connected to the top of the second fume extraction chamber through the second elastic element 6202. The second elastic element 6202 can be an elastic element such as a spring or a sheet spring. One or more can be set according to user needs. To ensure balanced pressure on the FPC board, when multiple second elastic elements 6202 are set, each second elastic element 6202 is symmetrically arranged along the welding points of the FPC board. In this embodiment, two spaced springs are provided to connect the second pressure head 6201, and the two springs are respectively arranged on both sides of the welding point.

[0095] To facilitate FPC board welding, a second through hole 62010 is formed inside the second pressure head 6201. A second pressure relief groove 6203 is provided on the bottom wall of the second pressure head 6201. The second pressure head 6201 is provided with a second air inlet for charging protective gas. The second through hole 62010 is connected to the second air inlet, and the airflow ejected from the second air inlet acts on the welding point. The number of second air inlets can be adjusted accordingly. When multiple second air inlets are provided, the second through hole 62010 is connected to multiple second air inlets simultaneously, and the airflow (protective gas) ejected from multiple second air inlets acts on the welding point. The second laser is arranged opposite to the second fume extraction chamber. The laser emitted by the second laser passes through the second fume extraction chamber and the second through hole 62010 in sequence to weld the welding point.

[0096] To ensure that the pressure between the FPC board and the second pressure head 6201 is within a preset range during welding, a second pressure sensor can be installed at the bottom of the second pressure head 6201. Thus, the second pressure sensor is located between the second pressure head 6201 and the FPC board, and the pressure between the second pressure head 6201 and the FPC board is detected by the second pressure sensor.

[0097] During the movement of the fume hood 6100, the second pressure sensor detects the pressure between the second pressure head 6201 and the FPC board. When the second elastic element 6202 is compressed and the pressure reaches the preset pressure, it indicates that the second pressure head 6201 has completed its docking with the FPC board. The top of the second pressure head 6201 is squeezed by the second elastic element 6202, while the bottom of the second pressure head 6201 abuts against the FPC board, and the FPC board abuts against the opening. At the same time, the side wall of the fume hood 6100 forms a clearance space for the components on the FPC board, preventing the fume hood 6100 from affecting the position of the FPC board. This allows for control of the laser head welding and utilizes the negative pressure in the fume hood 6100 to absorb smoke and dust near the welding point. Protective gas is then introduced into the welding point through the second air inlet under the action of negative pressure. At this time, the protective gas can enter the second fume extraction chamber through the second through hole 62010 under the action of negative pressure, and is discharged together with the smoke and dust.

[0098] When the second elastic element 6202 is in a stretched state, the second pressure head 6201 passes through the opening and is located outside the second fume extraction chamber, separating the FPC board from the opening. The second fume extraction chamber is separated from the second through hole 62010, thereby controlling the second laser to stop welding and stopping the extraction of smoke near the welding point, while also stopping the blowing of protective gas.

[0099] The FPC welding apparatus provided by this invention, during the movement of the fume hood 6100, is detected by the second pressure sensor. When the second elastic element 6202 is in a compressed state, the second pressure head 6201 is located inside the second fume extraction chamber, the FPC board abuts against the opening, and the side wall of the fume hood 6100 forms a clearance space adapted to the components on the FPC board. This allows control of the laser head welding and the absorption of smoke near the welding point using the negative pressure in the fume hood 6100. When the second elastic element 6202 is in a stretched state, the second pressure head 6201 passes through the opening and is located outside the second fume extraction chamber, the FPC board separates from the opening, thereby controlling the second laser to stop welding and stopping the extraction of smoke near the welding point.

[0100] It should be noted that, depending on the user's needs, a second pressure sensor can also be installed between the fume hood 6100 and the FPC board to detect the pressure between the FPC board and the fume hood 6100.

[0101] When the second elastic element 6202 is in a compressed state and the pressure reaches the preset pressure, it indicates that the second pressure head 6201 has completed docking with the FPC board, thereby controlling the laser head welding. The negative pressure in the fume hood 6100 absorbs the smoke and dust near the welding point, and protective gas is injected into the welding point through the second air inlet. Conversely, when the second elastic element 6202 is in a stretched state and the pressure has not reached the preset pressure, it indicates that the second pressure head 6201 has not completed docking with the FPC board. The laser head is then controlled to stop welding, and fume extraction near the welding point is stopped, along with the injection of protective gas.

[0102] The FPC welding apparatus also includes a second exhaust pipe 6300. The second exhaust pipe 6300 is located on one side of the fume hood 6100 and is connected to the second fume extraction chamber. The second exhaust pipe 6300 uses negative pressure to expel smoke and dust from the second fume extraction chamber.

[0103] This invention provides an FPC board welding device, such as... Figures 9 to 12 As shown, the fume hood 6100 includes a top plate 6101 and multiple side plates 6102.

[0104] In this embodiment, multiple side plates 6102 are sequentially arranged on the sides of the top plate 6101. These side plates 6102 surround the bottom surface of the top plate 6101 to form a second fume extraction cavity. The side plates 6102 are slidable relative to the top plate 6101 along the height direction. During welding, since the FPC boards contact the side plates 6102, to ensure airtightness during welding and avoid excessive pressure from the components on the FPC boards contacting the side plates 6102, the side plates 6102 not in contact with the FPC boards slide downwards to the lowest point. Correspondingly, the side plates 6102 in contact with the FPC boards slide upwards under the support of the FPC boards, thereby ensuring airtightness during welding while avoiding excessive pressure from the components on the FPC boards contacting the side plates 6102.

[0105] In another embodiment, an elastic plate can be provided on the top surface of the side plate 6102. That is, each side plate 6102 is connected to the bottom surface of the top plate 6101 through an elastic plate. The elastic plates are sequentially arranged to cooperate with each side plate 6102 to form a second smoke extraction cavity on the bottom surface of the top plate 6101. When the FPC board abuts against the side plate 6102, the elastic plate corresponding to the side plate 6102 supported by the FPC board is compressed, and the side plate 6102 moves upward accordingly. This ensures airtightness during welding while avoiding excessive pressure between the components on the FPC board and the side plate 6102. When the FPC board separates from the side plate 6102, the elastic plate corresponding to the side plate 6102 is stretched, and the side plate 6102 moves downward.

[0106] This invention provides an FPC board welding device, such as... Figures 9 to 12 As shown, the airflow ejected from the second air inlet acts on the welding point. The angle between the laser emitted from the second laser and the airflow is acute, and this acute angle ensures that the airflow is directed towards the welding point. A second air inlet tube is inclined downwards on the inner wall of the second pressure head 6201. The second air inlet tube is connected to the second air inlet, ensuring that the outlet of the second air inlet tube acts on the welding point. By providing the second air inlet tube, the direct blowing of protective gas onto the laser can be effectively prevented.

[0107] Furthermore, the peripheral wall of the second pressure head 6201 is provided with multiple spaced-apart second air inlets, and the second through hole 62010 is connected to each second air inlet. The airflow ejected from each second air inlet acts on the welding point, and the angle between the laser emitted by the second laser and each airflow is acute. Correspondingly, the inner wall of the second pressure head 6201 is provided with multiple downwardly inclined second air inlets, and each second air inlet is connected to a corresponding second air inlet, so that the outlet end of the second air inlet acts on the welding point. By providing multiple second air inlets, it is possible to effectively prevent the protective gas protecting any one of the second air inlets from directly blowing onto the laser.

[0108] Meanwhile, the second through hole 62010 is provided with a large diameter end and a small diameter end. The large diameter end of the second through hole 62010 is located on the side of the second pressure head 6201 close to the smoke hood 6100, and the small diameter end of the second through hole 62010 is located on the side of the second pressure head 6201 away from the smoke hood 6100.

[0109] During the movement of the fume hood 6100, the second pressure sensor detects the pressure between the second pressure head 6201 and the FPC board. When the second elastic element 6202 is in a compressed state and the pressure reaches the preset pressure, it indicates that the second pressure head 6201 has completed docking with the FPC board. The top of the second pressure head 6201 is squeezed by the second elastic element 6202, and the bottom of the second pressure head 6201 abuts against the FPC board. The FPC board abuts against the opening. At the same time, the side wall of the fume hood 6100 forms a clearance space for the components on the FPC board to be adapted, so as to avoid the fume hood 6100 affecting the position of the FPC board. This allows for control of laser head welding, and the negative pressure in the fume hood 6100 absorbs the smoke and dust near the welding point, and protective gas is injected into the welding point through the second air inlet. By changing the size of both ends of the second through-hole 62010, the protective gas flowing through the second air inlet creates greater resistance at the smaller diameter end of the second through-hole 62010. Most of the protective gas, after flowing towards the welding point, exits through the larger diameter end of the second through-hole 62010. Under negative pressure, the protective gas can enter the second fume extraction chamber through the larger diameter end of the second through-hole 62010, coordinating with the smoke and dust for emission. When the second elastic element 6202 is in a stretched state, the second pressure head 6201 passes through the opening and is located outside the second fume extraction chamber, separating the FPC board from the opening. The second fume extraction chamber separates from the second through-hole 62010, thereby controlling the second laser to stop welding and stopping fume extraction near the welding point, while simultaneously stopping the blowing of protective gas.

[0110] To facilitate the docking of the second pressure head 6201, a positioning groove is constructed at the bottom of the second pressure head 6201 for matching with the FPC board; when the second elastic member 6202 is in a compressed state, the positioning groove abuts against the FPC board. When the second elastic member 6202 is in a stretched state, the positioning groove separates from the FPC board.

[0111] Based on the above embodiments, in one embodiment provided in this application, the FPC welding device further includes: a second drive mechanism 6400, a frame 6500, and a second position sensor 6700.

[0112] The second drive mechanism is connected to one side of the fume hood 6100 and is used to drive the fume hood 6100 to move. The second drive mechanism is connected to the frame, and the second position sensor 6700 is installed on the frame and electrically connected to the second drive mechanism. By detecting the position of the FPC board, the second drive mechanism is controlled to make the second pressure head 6201 align with the FPC board.

[0113] The second drive mechanism includes: a first displacement device and a second displacement device; the first displacement device and the second displacement device may be lead screws, the first displacement device is provided with a first mounting plate that can slide along the Z-axis direction; the second displacement device is set on the first mounting plate, the second displacement device is provided with a second mounting plate that can slide along the X-axis direction, and the second mounting plate is provided with a fume hood 6100.

[0114] Specifically, by setting two displacement devices, the first displacement device can adjust the height of the fume hood 6100, thereby adjusting the relative height between the second pressure head 6201 and the FPC board. The second displacement device can adjust the horizontal position of the fume hood 6100, thereby adjusting the corresponding position between the second pressure head 6201 and the FPC board, so that the second pressure head 6201 can be aligned with the FPC board. The second position sensor 6700 can be a vision sensor, which is used to detect the position of the FPC board, so that the second pressure head 6201 can be aligned with the FPC board and weld the FPC board to the welding point of the battery module.

[0115] During operation, the second position sensor 6700 detects the position of the FPC board, first controls the second displacement device to set the second pressure head 6201 relative to the FPC board, and then controls the relative height between the second pressure head 6201 and the FPC board through the first displacement device. During the vertical movement of the fume hood 6100, the second pressure sensor detects the pressure between the second pressure head 6201 and the FPC board. When the second elastic element 6202 is compressed and the pressure reaches the preset pressure, it indicates that the second pressure head 6201 has successfully docked with the FPC board. The top of the second pressure head 6201 is squeezed by the second elastic element 6202, while the bottom of the second pressure head 6201 abuts against the FPC board, and the FPC board abuts against the opening. Simultaneously, the sidewall of the fume hood 6100 forms a clearance space for the components on the FPC board, preventing the fume hood 6100 from affecting the position of the FPC board. This allows for control of the laser head welding and utilizes the negative pressure in the fume hood 6100 to absorb smoke and dust near the welding point. Protective gas is then introduced into the welding point through the second air inlet under the action of negative pressure. At this time, the protective gas can enter the second fume extraction chamber through the second through hole 62010 under the action of negative pressure, and is discharged along with the smoke and dust. When the second elastic element 6202 is in a stretched state, the second pressure head 6201 passes through the opening and is located outside the second fume extraction chamber, separating the FPC board from the opening. The second fume extraction chamber is separated from the second through hole 62010, thereby controlling the second laser to stop welding and stopping the extraction of smoke near the welding point, while also stopping the blowing of protective gas.

[0116] The welding device also includes a second insulating plate 6600, and a fume hood 6100 is connected to the second drive mechanism via the second insulating plate 6600. The second insulating plate 6600 can be made of rubber or other insulating materials, so that the second pressure head 6201, the second elastic element 6202, and the fume hood 6100 are all connected to the second drive mechanism via the second insulating plate 6600, thus preventing the second pressure head 6201 and the second elastic element 6202 from becoming electrified during the welding process and affecting the welding.

[0117] Based on the above embodiments, in one embodiment provided by the present invention, the battery module assembly production line further includes:

[0118] The smoking device and the filtration device are connected, with the first smoking chamber and the second smoking chamber both connected to the filtration device, and the filtration device connected to the first air inlet and the second air inlet.

[0119] The protective gas can enter the smoke extraction chamber through the first through-hole 4100 under negative pressure, and together with the smoke and dust, it passes through the smoke extraction device and finally enters the filtration device. After the filtration device filters the gas, it can be pressurized and enter through the first air inlet 4203 and the second air inlet. By setting up the smoke extraction device and the filtration device, not only is the smoke and dust effectively removed, but the protective gas can also be recycled, reducing equipment wear and tear.

[0120] like Figure 13 and Figure 14 As shown, the adhesive application device 2 includes: a mounting base 21, an adhesive applicator 22, and an adhesive application drive mechanism 23. The mounting base 21, as the main structure of the adhesive application device 2, can directly contact the ground. A corresponding drive component can be installed on the mounting base 21 to drive the entire adhesive applicator 22 to move. The adhesive applicator 22 has an adhesive outlet 220, and one end of the adhesive applicator 22 away from the adhesive outlet 220 is oscillatingly or rotatably mounted on the mounting base 21. The adhesive application drive mechanism 23 can be a motor, used to drive the adhesive applicator 22 to oscillate or rotate, spraying adhesive onto the periphery of the battery box. During operation, after the battery box is placed in position, the adhesive outlet 220 of the adhesive applicator 22 is aligned with the battery box. The oscillating drive mechanism 23 drives the adhesive applicator 22 to oscillate or rotate, thus adjusting the working posture of the adhesive applicator 22 and enabling it to oscillate or rotate to spray adhesive onto the periphery of the battery box.

[0121] In addition, the box-loading device 3 includes a clamping mechanism and a loading mechanism. The loading mechanism uses a robotic arm or transporter to move the battery cells to the glued battery box, and the clamping mechanism uses a lifting pressure head to clamp the battery cells and stack them into groups.

[0122] In a specific embodiment, such as Figures 1 to 14 As shown, during the battery module assembly line operation, the battery box and cell fixing components are first loaded by the loading device 1. After the battery box is placed in place, the glue outlet 220 of the glue applicator 22 is aligned with the battery box. The swing drive mechanism 23 drives the glue applicator 22 to swing or rotate, thus adjusting the working posture of the glue applicator 22 and allowing it to swing or rotate to spray glue onto the periphery of the battery box. After the glue is applied to the battery box, the loading mechanism uses a robotic arm or transporter to move the cells to the glued battery box. The pressing mechanism uses a lifting pressure head to press the cells together, stacking them into groups. This ensures that the periphery of the cells adheres tightly to the periphery of the battery box.

[0123] Then, the manifold is fed in. The first pressure sensor detects the pressure between the first pressure head 4200 and the fume extraction box 410. When the first elastic element 4201 is compressed and the pressure reaches the preset pressure, it indicates that the first pressure head 4200 has successfully docked with the fume extraction box 410. Both ends of the first pressure head 4200 are in contact with the fume extraction box 410 and the manifold. The fume extraction chamber is connected to the first through hole 4100, allowing control of the laser head welding. The negative pressure in the fume extraction box 410 absorbs the smoke and dust near the welding point, and protective gas is injected into the welding point through the first air inlet 4203. At this time, the protective gas, under the action of negative pressure, enters the fume extraction chamber through the first through hole 4100, cooperating with the smoke and dust for emission. When the first elastic element 4201 is in a stretched state, if the pressure does not reach the preset pressure, the two ends of the first pressure head 4200 are separated from the fume extraction box 410 and the manifold, and the fume extraction chamber is separated from the first through hole 4100. This allows the first laser to be controlled to stop welding and to stop fume extraction near the welding point, while also stopping the blowing of protective gas.

[0124] After the busbar welding is completed, the first welding inspection device 5 is used to inspect the battery module of the welded busbar to check the welding effect of the busbar. If the test result is normal, the FPC board is loaded and the FPC welding device 6 is used to weld the FPC board to the battery module. During the welding process, the second pressure sensor detects the pressure between the second pressure head 6201 and the FPC board. When the second elastic member 6202 is in a compressed state and the pressure reaches the preset pressure, it indicates that the second pressure head 6201 has completed the docking with the FPC board. The top of the second pressure head 6201 is squeezed by the second elastic member 6202, and the bottom of the second pressure head 6201 is in contact with the FPC board. The FPC board is in contact with the opening. At the same time, the side wall of the fume hood 6100 forms a clearance space for the components on the FPC board to be adapted, so as to avoid the fume hood 6100 affecting the position of the FPC board. Thus, the laser head welding can be controlled, and the negative pressure in the fume hood 6100 is used to absorb the smoke and dust near the welding point, and protective gas is injected into the welding point through the second air inlet. At this time, the protective gas can enter the second fume extraction chamber through the second through hole 62010 under negative pressure, and be discharged together with the smoke and dust. When the second elastic member 6202 is in a stretched state, the second pressure head 6201 passes through the opening and is located outside the second fume extraction chamber, and the FPC board is separated from the opening. The second fume extraction chamber is separated from the second through hole 62010, thereby controlling the second laser to stop welding and stopping the extraction of smoke near the welding point, while also stopping the blowing of protective gas.

[0125] The battery module with the welded FPC board is then inspected using the second welding inspection device 7. If the inspection result is normal, the performance of the assembled battery module is inspected using the performance inspection device 8. If any of the first welding inspection device 5, the second welding inspection device 7, or the performance inspection device 8 detects that the battery module is abnormal, the NG (non-performing) cell module can be directly removed from the production line.

[0126] The above embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Although the invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the invention do not depart from the spirit and scope of the invention and should be covered within the scope of the claims of the invention.

Claims

1. A battery module assembly production line, characterized in that, include: The device includes a feeding device, an adhesive coating device, a box-entry device, a busbar welding device, a first welding inspection device, an FPC welding device, a second welding inspection device, and a performance inspection device, arranged sequentially along the processing direction. The busbar welding device is used to weld the busbar to the first welding point of the battery module. The busbar welding device includes a fume extraction box, a first pressure head assembly, a first laser, and a first pressure sensor. The feeding device is used for feeding battery boxes; the adhesive application device is used for spraying adhesive onto the perimeter walls of each battery box; the box-loading device is used for moving the battery cells to the glued battery boxes and stacking them into groups; the busbar welding device is used for welding the busbars to the battery modules; the first welding inspection device is used for inspecting the battery modules with welded busbars; the FPC welding device is used for welding FPC boards to the battery modules; the second welding inspection device is used for inspecting the battery modules with welded FPC boards; and the performance testing device is used for inspecting the performance of the assembled battery modules. The smoke extraction box contains a first smoke extraction cavity; the first pressure head assembly includes a first pressure head and a first elastic element; the first pressure head is connected to the bottom of the smoke extraction box via the first elastic element, the first pressure head contains a first through hole opposite to the first smoke extraction cavity, the bottom wall of the first pressure head has a first pressure relief groove, the peripheral wall of the first pressure head has multiple first air inlets, the first through hole communicates with the first air inlets, and the airflow ejected from the first air inlets acts on the first welding point; the first pressure sensor is used to detect the pressure between the first pressure head and the smoke extraction box; during the movement of the smoke extraction box, when the first elastic element is in a compressed state, the two ends of the first pressure head abut against the smoke extraction box and the manifold, and the first smoke extraction cavity communicates with the first through hole; when the first elastic element is in a stretched state, the two ends of the first pressure head separate from the smoke extraction box and the manifold, and the first smoke extraction cavity separates from the first through hole; The FPC welding device is used to weld the FPC board to the second welding point of the battery module, and includes: a fume extractor, a second pressure head assembly, a second laser, and a second pressure sensor; the fume extractor has a second fume extraction cavity inside, and an opening at its bottom; the second pressure head assembly includes a second pressure head and a second elastic element disposed in the second fume extraction cavity; the second pressure head is connected to the top of the second fume extraction cavity through the second elastic element, a second through hole is formed inside the second pressure head, a second pressure relief groove is provided on the bottom wall of the second pressure head, and a second air inlet for filling with protective gas is provided on the pressure head, the second through hole communicating with the second air inlet, and the airflow ejected from the second air inlet acts on... At the second welding point; the second laser is disposed opposite to the second smoke extraction cavity, and the laser emitted by the second laser passes through the second smoke extraction cavity and the second through hole in sequence to weld the second welding point; the second pressure sensor is used to detect the pressure between the second pressure head and the FPC board; when the second elastic member is in a compressed state, the second pressure head is located in the second smoke extraction cavity, the FPC board abuts against the opening, and the side wall of the smoke extraction hood forms a clearance space for the components on the FPC board to be adapted; when the second elastic member is in a stretched state, the second pressure head passes through the opening and is located outside the second smoke extraction cavity, and the FPC board is separated from the opening.

2. The battery module assembly line according to claim 1, characterized in that, The performance testing device includes: A charge / discharge testing mechanism is used to perform charge / discharge testing on battery modules after assembly. Battery safety testing organizations are used to conduct safety tests on assembled battery modules. The BMS testing facility is used to perform BMS testing on the assembled battery modules. The auxiliary function testing unit is used to perform auxiliary function tests on the assembled battery module.

3. The battery module assembly line according to claim 1, characterized in that, The first pressure head includes an outer peripheral wall and an inner peripheral wall arranged coaxially, and an airflow channel is formed between the outer peripheral wall and the inner peripheral wall. The first air inlet is connected to the airflow channel, and the airflow channel sprays airflow circumferentially toward the first welding point.

4. The battery module assembly line according to claim 1, characterized in that, The busbar welding device further includes: a smoke extraction pipe, which is disposed at the bottom of the smoke extraction box, the smoke extraction pipe is connected to the first smoke extraction cavity, and the smoke extraction pipe is disposed opposite to the through hole; When the first elastic element is in a compressed state, both ends of the first pressure head abut against the smoke extraction pipe and the manifold, respectively, and the smoke extraction pipe is connected to the first through hole; when the first elastic element is in a compressed state, both ends of the first pressure head are separated from the smoke extraction pipe and the manifold, and the smoke extraction pipe is separated from the first through hole.

5. The battery module assembly line according to claim 1, characterized in that, The fume hood includes: The top plate and multiple side plates are arranged sequentially on the side of the top plate. The multiple side plates surround the bottom surface of the top plate to form the second smoke extraction cavity. The side plates are slidable relative to the top plate in the height direction. The side plates that are not in contact with the FPC plate slide downward to the lowest point, and the side plates that are in contact with the FPC plate slide upward accordingly.

6. The battery module assembly line according to claim 1, characterized in that, The battery module assembly line also includes a smoke extraction device and a filtration device. The first smoke extraction chamber and the second smoke extraction chamber are both connected to the filtration device through the smoke extraction device, and the filtration device is connected to the first air inlet and the second air inlet.

7. The battery module assembly line according to any one of claims 1-6, characterized in that, The box-in device includes: a pressing mechanism and a feeding mechanism; The feeding mechanism is used to move the battery cells to the battery box after the adhesive has been applied, and the pressing mechanism is used to press and stack the battery cells into a group.

8. The battery module assembly line according to any one of claims 1-6, characterized in that, The adhesive application device includes: Mounting base; A glue applicator has a glue outlet, and one end of the glue applicator away from the glue outlet is oscillatingly or rotatably mounted on the mounting base; The glue application drive mechanism is used to drive the glue application machine to swing or rotate, and to spray glue onto the peripheral wall of the battery box.

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