Automobile power battery combination line

Abstract

This utility model relates to the field of automotive manufacturing technology, and more specifically, to an automotive power battery assembly line. It includes a overhead rail for transporting the vehicle body, on which a lifting device for lifting the vehicle body is slidably mounted. Battery assembly stations and battery tightening stations are sequentially arranged along the vehicle body transport direction, both located directly below the overhead rail. A battery transport track for transferring batteries is also provided, including a battery input track and a battery assembly track connected to it. Battery assembly stations and battery tightening stations are equipped with sequentially connected battery assembly tracks. The battery assembly station is equipped with a battery assembly device, and the battery tightening station is equipped with a battery tightening device. This utility model enables automatic assembly of the vehicle and power battery with high installation accuracy, improving the automation level and battery assembly efficiency of the automotive production process.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, and more specifically, to an automobile power battery assembly line. Background Technology

[0002] As the market share of new energy vehicles has increased from a portion to over half, traditional gasoline vehicle manufacturers are facing the challenge of transforming to produce new energy vehicles. As a crucial component of new energy vehicles, the power battery is also the assembly component that differs most significantly from that of gasoline vehicles in the overall vehicle assembly process. This necessitates the introduction of entirely new transportation, positioning, and assembly equipment to handle the installation of power batteries in new energy vehicles. Current technology generally uses mobile battery assembly equipment, typically including a movable base, lifting arm, drive unit, and battery tray. This solution can flexibly adapt to the existing production line's elevation. It is usually located at a higher elevation, such as on the chassis line, where workers use the equipment under the vehicle to assemble the battery. The battery is placed on the tray, and as the vehicle moves to the battery assembly station, the entire equipment moves with the vehicle. During this process, the battery is lifted, positioned, and assembled, and workers use electric tightening tools to tighten the power battery fasteners. In this approach, mobile battery assembly vehicles, due to their mobile installation, naturally have lower precision than fixed-station installations. This necessitates increased design work or equipment costs to ensure accuracy. Mobile battery assembly vehicles require high following precision, which is difficult for hand-pushed assembly trolleys to meet. Generally, large AGVs are purchased to address this, typically requiring multiple large AGVs to meet production turnover needs, resulting in high costs. The vehicle production line requires personnel operating space and spare parts space. Furthermore, mobile battery assembly vehicles, due to their mobile assembly process, must occupy a significant amount of existing workspace, and their movement during turnover also requires substantial additional space for spare parts. Utility Model Content

[0003] To address the technical problem of low precision in existing battery assembly equipment, this invention provides an automotive power battery assembly line that enables automatic assembly of automobiles and power batteries, improving the automation level of automobile production and the efficiency of battery assembly, while reducing the workload of workers.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an automotive power battery assembly line, including a crane rail for transporting the vehicle body, on which a lifting device for lifting the vehicle body is slidably installed. Battery assembly stations and battery tightening stations are sequentially arranged along the vehicle body transport direction, both located directly below the crane rail. A battery transport track for transferring batteries is also provided, with a drive device for moving the batteries on the battery transport track. The battery transport track includes a battery input track and a battery assembly track, connected to the battery assembly track. The battery assembly station and the battery tightening station are each sequentially connected to the battery assembly track. The battery assembly station is equipped with a battery assembly device, and the battery tightening station is equipped with a battery tightening device.

[0005] In this technical solution, the overhead rail is a track used to transport the vehicle body and serves to determine the direction of vehicle body movement. A lifting device is slidably connected to the overhead rail, used to lift the vehicle body and move it along the overhead rail. After the vehicle body enters the assembly line along the overhead rail, a battery transport track is located below the overhead rail. A drive device is installed on the upper surface of the battery transport track to provide power for the movement of the battery on the battery transport track. The battery transport track includes an input track and a battery assembly track. The input track is used to input external batteries into the battery assembly track below the overhead rail, and the battery assembly track is used to transport the battery and assemble it with the vehicle body. A battery assembly device and a battery tightening device are sequentially arranged along the length of the battery assembly track. When the battery is transported to the battery assembly station by the battery assembly track, the vehicle body transported by the lifting device is exactly above the battery assembly device and stops moving. The battery assembly device then assembles the battery and the vehicle body together. After assembly, the lifting device continues to move the vehicle body, and the battery assembly track moves the battery synchronously with the vehicle body. When the vehicle body and battery move to the battery tightening station, the lifting device and battery assembly rail stop moving the vehicle body and battery. Then, the battery tightening device operates, tightening the fastening bolts on the battery into the vehicle body, completing the battery assembly. The lifting device then continues to move the vehicle body, removing the battery-equipped vehicle body from the automotive power battery assembly line. Throughout the assembly process, each step is arranged along the direction of vehicle body movement, enabling a streamlined assembly process and significantly improving efficiency. Sensors are installed on both the lifting rail and the battery transport rail to determine the position of the vehicle body and battery, sending the position information to an external controller. The external controller then centrally controls the operation of the lifting device, battery transport rail, battery assembly device, and battery tightening device.

[0006] Preferably, the station above the battery assembly station is further provided with a vehicle body straightening station, which is located directly below the lifting rail, and the vehicle body straightening station is provided with a vehicle body straightening device for straightening the vehicle body on the lifting device.

[0007] Preferably, the vehicle body straightening device includes a bracket, a positioning device, and a straightening execution device. The bracket includes a fixed part and a sliding part. The fixed part is fixed to the ground, and the sliding part is slidably mounted on the fixed part. The sliding part can slide in the vertical direction. The fixed part is also equipped with a driving device for driving the sliding part to slide. A lifting part is provided in the middle of the sliding part. The position of the lifting part is aligned with the position of the reinforcing beam of the vehicle body. A positioning hole is provided at the bottom of the lifting device. The positioning device includes a first telescopic member and a first positioning pin. The telescopic end of the first telescopic member is fixed to the fixed part with its telescopic end facing upward. The first positioning pin is fixed to the telescopic end of the first telescopic member and aligned with the positioning hole. The straightening execution device is installed on both sides of the lifting part on the sliding part.

[0008] Preferably, the straightening actuator includes a first straightening block, a second straightening block, a third telescopic member, and a fourth telescopic member. The first straightening block and the second straightening block are respectively installed on the sliding part on both sides of the lifting part. The first straightening block and the second straightening block can slide along a direction perpendicular to the length of the hanging rail. The third telescopic member and the fourth telescopic member are installed on the sliding part, and the telescopic ends of the third telescopic member and the fourth telescopic member are respectively connected to the first straightening block and the second straightening block.

[0009] Preferably, the battery assembly track includes an assembly section, which is located at the battery assembly station. The battery assembly device includes a lifting bracket and a second positioning device. The assembly section is installed on the lifting bracket. A positioning hole is provided at the bottom of the lifting device. The second positioning device includes a fifth telescopic member and a second positioning pin. The telescopic end of the fifth telescopic member is fixed to the ground facing upwards. The second positioning pin is fixed to the telescopic end of the fifth telescopic member and can be inserted into the positioning hole.

[0010] Preferably, the battery tightening device includes a robotic arm, a mounting bracket, and an electric tightener. The battery has pre-installed mounting bolts. The mounting bracket is fixed to the robotic arm, and the electric tightener is mounted on the mounting bracket and is matched with the mounting bolts.

[0011] Preferably, the battery transport track is further provided with a skid, on which the battery is placed. A separation device for separating the battery from the skid is also provided, which is located at a separation station, the next station after the battery tightening station, and directly below the hanging rail. The battery assembly track also has a separation section, and the separation device is a second lifting bracket. The separation section is installed on the second lifting bracket and is also provided with an output track, which is connected to the outlet of the separation section.

[0012] Preferably, a third positioning pin is fixedly installed on the upper surface of the skid, and the bottom of the battery has a structural hole, with the third positioning pin inserted into the structural hole.

[0013] Preferably, the battery assembly track is further provided with a fixing device for determining the position of the skid. The fixing device includes a pin and a sixth telescopic member. The sixth telescopic member is fixed on the battery assembly track and located below the upper surface of the battery assembly track. The telescopic end of the sixth telescopic member faces upward. The pin is fixedly installed on the telescopic end of the sixth telescopic member. The bottom surface of the skid is also provided with a second positioning hole, and the pin can be inserted into the second positioning hole.

[0014] Preferably, the lifting device includes a drive wheel and a boom. The drive wheel is rotatably mounted on the lifting rail. The upper end of the boom is fixedly connected to the drive wheel. Multiple booms are provided. The lower end of the boom is provided with a crane hook. The drive wheel is also connected to a driving component.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: This utility model features a battery transport track that automates battery transport without manual handling. It can be used in conjunction with a hanging rail and lifting device to achieve assembly line-style battery-vehicle assembly, greatly improving assembly efficiency and making it suitable for large-scale battery assembly operations. The inclusion of a battery assembly device and a battery tightening device allows for battery assembly and bolt connection to the vehicle body without manual intervention, reducing the workload of workers. Attached Figure Description

[0016] Figure 1 This is a perspective view of the vehicle power battery assembly line of this utility model;

[0017] Figure 2 This is a perspective view of the automotive power battery assembly line after removing the overhead rails;

[0018] Figure 3 This utility model relates to a three-dimensional vehicle body straightening device in the vehicle power battery assembly line.

[0019] Figure 4This is a perspective view of the battery assembly device in the automotive power battery assembly line of this utility model;

[0020] Figure 5 This is a perspective view of the battery tightening device in the automotive power battery assembly line of this utility model;

[0021] Figure 6 This is a perspective view of the separation device in the vehicle power battery assembly line of this utility model.

[0022] In the attached diagram: 1. Suspension rail; 2. Battery transport rail; 3. Lifting device; 4. Vehicle straightening device; 5. Battery assembly device; 6. Battery tightening device; 7. Separation device; 21. Battery input rail; 22. Skid; 23. Assembly section; 25. Separation section; 26. Output rail; 27. Fixing device; 31. Drive wheel; 32. Crane boom; 33. Crane hook; 41. Bracket; 42. Positioning device; 43. Drive device; 44. First straightening block; 45. Second straightening block; 46. Third telescopic component; 47. Fourth telescopic component; 51. Lifting bracket; 52. Second positioning device; 61. Mechanical arm; 62. Mounting bracket; 63. Electric tightener; 251. Pin; 252. Sixth telescopic component; 421. First telescopic component; 422. First positioning pin; 521. Fifth telescopic component; 522. Second positioning pin. Detailed Implementation

[0023] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0024] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0026] Example 1

[0027] like Figure 1 As shown, an automotive power battery assembly line includes a overhead rail 1 for transporting the vehicle body. A lifting device 3 for lifting the vehicle body is slidably mounted on the overhead rail 1. Battery assembly stations and battery tightening stations are sequentially arranged along the vehicle body transport direction, both located directly below the overhead rail 1. A battery transport track 2 for transferring batteries is also provided. A drive device for moving the batteries is installed on the battery transport track 2. The battery transport track 2 includes a battery input track 21 and a battery assembly track, with the battery input track 21 connected to the battery assembly track. Battery assembly stations and battery tightening stations are sequentially connected to the battery assembly track. The battery assembly station is equipped with a battery assembly device 5, and the battery tightening station is equipped with a battery tightening device 6. The overhead rail 1 is used to transport the vehicle body and determines the direction of vehicle body movement. A lifting device is slidably connected to the overhead rail 1, used to lift the vehicle body and move it along the overhead rail 1. After the vehicle body enters the assembly line along the overhead rail 1, a battery transport rail 2 is located below the overhead rail 1. A drive device is installed on the upper surface of the battery transport rail 2 to provide power for the movement of the battery on the battery transport rail 2. The battery transport rail 2 includes a battery input rail 21 and a battery assembly rail. The battery input rail 21 is used to input external batteries into the battery assembly rail below the overhead rail 1. The battery assembly rail is used to transport the battery and assemble it with the vehicle body. A battery assembly device 5 and a battery tightening device 6 are sequentially arranged along the length of the battery assembly rail. When the battery is transported to the battery assembly station by the battery assembly rail, the vehicle body transported by the crane is positioned directly above the battery assembly device 5 and stops moving. The battery assembly device 5 then assembles the battery with the vehicle body. After assembly, the crane continues to move the vehicle body, and the battery assembly rail moves the battery synchronously with the vehicle body. When the vehicle body and battery move to the battery tightening station, the lifting device and battery assembly rail stop driving the vehicle body and battery to move. Then, the battery tightening device 6 operates, tightening the fastening bolts on the battery into the vehicle body, thus assembling the battery. Afterward, the lifting device continues to move the vehicle body, removing the vehicle body with the battery installed from the automotive power battery assembly line. Throughout the assembly process, each process is set along the direction of the vehicle body's movement, enabling a streamlined assembly process and greatly improving assembly efficiency. Sensors are installed on both the lifting rail 1 and the battery transport rail 2 to determine the position of the vehicle body and battery and send the position information to an external controller. The external controller then controls the operation of the lifting device, battery transport rail 2, battery assembly device 5, and battery tightening device 6.

[0028] like Figure 1As shown, the station above the battery assembly station also has a vehicle body straightening station, located directly below the lifting rail 1. The vehicle body straightening station is equipped with a vehicle body straightening device 4 for straightening the vehicle body on the lifting device 3. The vehicle body straightening device 4 is used to straighten the vehicle body on the lifting device 3, ensuring that the vehicle body is in the correct position during the subsequent battery assembly process. This ensures accurate positioning of the vehicle body and avoids battery assembly failure or even damage to the equipment due to vehicle body position deviation.

[0029] like Figure 3 As shown, the vehicle body straightening device 4 includes a bracket 41, a positioning device 42, and a straightening execution device. The bracket 41 includes a fixed part and a sliding part. The fixed part is fixed to the ground, and the sliding part is slidably installed on the fixed part. The sliding part can slide in the vertical direction. The fixed part is also equipped with a driving device 43 for driving the sliding part to slide. A lifting part 48 is provided in the middle of the sliding part. The position of the lifting part 48 is aligned with the position of the reinforcing beam of the vehicle body. The bottom of the lifting device 3 is provided with a positioning hole. The positioning device 42 includes a first telescopic member 421 and a first positioning pin 422. The telescopic end of the first telescopic member 421 is fixed to the fixed part with its telescopic end facing upward. The first positioning pin 422 is fixed to the telescopic end of the first telescopic member 421 and aligned with the positioning hole. The straightening execution device is installed on both sides of the lifting part 48 on the sliding part. The positioning device 42 determines the relative position of the vehicle body and the vehicle body straightening device 4 by driving the first telescopic member 421 to insert the first positioning pin 422 into the positioning hole located at the lower end of the lifting device 3, thus preventing the vehicle body from being unable to be straightened or even damaged due to the incorrect positioning of the vehicle body straightening device 4. Then, the driving device 43 drives the sliding part to slide upward, causing the lifting part 48 to abut against the vehicle body, thereby lifting the vehicle body and disengaging it from the lifting device 3. The position of the lifting part 48 is aligned with the position of the bottom reinforcing beam of the vehicle body, avoiding damage to the vehicle body structure during lifting. Then, the straightening execution device works to adjust the direction of the vehicle body so that the length direction of the vehicle body is in the same direction as the length direction of the lifting rail 1, thereby straightening the vehicle body. Afterward, the driving device 43 drives the sliding part to slide down, moving the vehicle body back onto the lifting device 3. Then, the first telescopic member 421 drives the first positioning pin 422 to be pulled out from the positioning hole at the lower end of the lifting arm 32. Then, the lifting device 3 moves the vehicle body on the lifting rail 1 to enter the next process. The first telescopic component 421, the drive device 43, and the straightening actuator are all electrically connected to an external controller, which controls the first telescopic component 421, the drive device 43, and the straightening actuator to work together.

[0030] like Figure 3As shown, the straightening actuator includes a first straightening block 44, a second straightening block 45, a third telescopic member 46, and a fourth telescopic member 47. The first and second straightening blocks 44 and 45 are respectively mounted on the sliding part on both sides of the lifting part 48. The first and second straightening blocks 44 and 45 can slide along a direction perpendicular to the length of the hanging rail 1. The third and fourth telescopic members 46 and 47 are mounted on the sliding part, and their telescopic ends are respectively connected to the first and second straightening blocks 44 and 45. When straightening is required, the third and fourth telescopic members 46 and 47 respectively drive the first and second straightening blocks 44 and 45 to move in the direction of the vehicle body, thereby clamping them on both sides of the vehicle body. When there is a deviation in the orientation of the vehicle body, the first or second straightening block 44 will push the vehicle body to move until the vehicle body is aligned with the horizontal direction of the hanging rail 1, thus completing the straightening.

[0031] Example 2

[0032] This embodiment is similar to Embodiment 1 above, except that, as Figure 2 , 4 As shown, the battery assembly track includes an assembly section 23, which is located at the battery assembly station. The battery assembly device 5 includes a lifting bracket 51 and a second positioning device 52. The assembly section 23 is mounted on the lifting bracket 51. The bottom of the lifting device 3 has a positioning hole. The second positioning device 52 includes a fifth telescopic member 521 and a second positioning pin 522. The telescopic end of the fifth telescopic member 521 is fixed to the ground facing upwards. The second positioning pin 522 is fixed to the telescopic end of the fifth telescopic member 521 and can be inserted into the positioning hole. When the vehicle body is transported to the battery assembly station, the lifting device 3 stops moving the vehicle body. The fifth telescopic member 521 in the second positioning device 52 drives the second positioning pin 522 to insert into the positioning hole located at the bottom of the lifting arm 32, thereby fixing the position of the lifting device 3 and thus fixing the position of the vehicle body. Then, the battery input rail 21 inputs the battery into the vehicle assembly section 23. The lifting bracket 51 then rises, carrying the battery into the mounting slot at the bottom of the vehicle body for installing the power battery, completing the assembly of the battery and the vehicle body. The hoist 3 then moves the vehicle body and battery further. Once the battery leaves the assembly section, the lifting bracket 51 lowers the assembly section 23 back to its original position to receive the next battery input.

[0033] like Figure 2 , 5As shown, the battery tightening device 6 includes a robotic arm 61, a mounting bracket 62, and an electric tightener 63. Mounting bolts are pre-installed on the battery. The mounting bracket 62 is fixed to the robotic arm 61, and the electric tightener 63 is mounted on the mounting bracket 62, matching the mounting bolts. When the lifting device 3 moves the vehicle body (with the battery already attached) to the battery tightening station and stops moving, the robotic arm 61 moves the mounting bracket 62 and the electric tightener 63 located on the mounting bracket 62 under the vehicle body, aligning them with the mounting bolts on the battery. The electric tightener 63 tightens the mounting bolts, thus installing the battery onto the vehicle body. After tightening, the robotic arm 61 removes the mounting bracket 62 and the electric tightener 63 from under the vehicle body, and then the lifting device 3 continues to move the vehicle body. Multiple electric tighteners 63 can be mounted on the mounting bracket 62; the number and position of the electric tighteners 63 are determined by the number and position of the mounting bolts on the battery.

[0034] Example 3

[0035] This embodiment is similar to Embodiment 1 above, except that, as Figure 1 , 6 As shown, the battery transport track 2 is also equipped with a skid 22 on which the battery is placed. A separation device 7 for separating the battery from the skid 22 is also provided. The separation device 7 is located at a separation station, which is the next station after the battery tightening station. The separation station is located directly below the lifting rail 1. The battery assembly track also has a separation section 25, and the separation device 7 is a second lifting bracket. The separation section 25 is installed on the second lifting bracket and also has an output track 26 connected to the outlet of the separation section 25. Placing the battery on the skid 22 prevents the battery from sliding directly on the battery transport track 2 and causing damage to the battery surface. After the battery assembly and tightening are completed, the battery is fixed to the bottom of the vehicle body, while the skid 22 is not fixed to the vehicle body. The vehicle body is moved to the separation section 25 by the lifting device 3, and the skid 22 is subsequently moved to the separation section 25. Then, the second lifting bracket lowers the separation section 25. At this point, the battery has already been tightened to the bottom of the vehicle body, so the battery is not affected by the descent of the separation section 25. The skid 22 descends along with the separation section 25, ultimately separating the skid 22 from the battery. The skid 22 is then transported to the output rail 26, from which the battery assembly line is output to participate in the transport of the next battery.

[0036] like Figure 1 As shown, a third positioning pin is also fixedly installed on the upper surface of the skid 22, and the bottom of the battery has a structural hole, into which the third positioning pin is inserted. By inserting the third positioning pin into the structural hole at the bottom of the battery, the relative position of the skid 22 and the battery in the horizontal direction is fixed, without restricting the relative position of the skid 22 and the battery in the vertical direction, which facilitates the separation of the skid 22 and the battery.

[0037] like Figure 2 As shown, a fixing device 27 for determining the position of the skid 22 is also provided on the battery assembly track. The fixing device 27 includes a pin and a sixth telescopic member. The sixth telescopic member is fixed on the battery assembly track below the upper surface of the track, with its telescopic end facing upwards. The pin is fixedly installed on the telescopic end of the sixth telescopic member. A second positioning hole is also provided on the bottom surface of the skid 22, into which the pin can be inserted. The sixth telescopic member on the fixing device 27 is fixed at a specific position on the battery assembly track as needed. When the skid 22 moves to this position, the sixth telescopic member drives the pin to insert into the positioning hole on the skid 22, thereby fixing the position of the skid 22 and the battery on the skid 22, preventing assembly failure or even damage to the battery or vehicle body due to deviation in battery position. After the relevant operation is completed, the sixth telescopic member drives the pin to be pulled out of the second positioning hole, and the skid can then move freely.

[0038] like Figure 4 As shown, the lifting device 3 includes a drive wheel 31 and a boom 32. The drive wheel 31 is rotatably mounted on the lifting rail 1. The upper end of the boom 32 is fixedly connected to the drive wheel 31. Multiple booms 32 are provided. A crane hook 33 is provided at the lower end of the boom 32. The drive wheel 31 is also connected to a drive component. The drive component provides power for the drive wheel 31 to drive the vehicle body to slide on the lifting rail 1. The drive wheel 31 is fixedly connected to the boom 32. The boom 32 extends to the underside of the vehicle body. A crane hook 33 is provided at the bottom end of the boom 32 to hook onto the vehicle chassis.

[0039] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A vehicle power battery pack cable, characterized in that, The system includes a crane rail (1) for transporting the vehicle body, on which a lifting device (3) for lifting the vehicle body is slidably mounted. A battery assembly station and a battery tightening station are arranged sequentially along the vehicle body transport direction. The battery assembly station and the battery tightening station are both located directly below the crane rail (1). A battery transport track (2) for transferring batteries is also provided. A drive device for moving the batteries is provided on the battery transport track (2). The battery transport track (2) includes a battery input track (21) and a battery assembly track. The battery input track (21) is connected to the battery assembly track. The battery assembly station and the battery tightening station are provided with the battery assembly track connected sequentially. The battery assembly station is provided with a battery assembly device (5), and the battery tightening station is provided with a battery tightening device (6).

2. The busbar of claim 1, wherein, The station above the battery assembly station is also provided with a vehicle body straightening station. The vehicle body straightening station is located directly below the lifting rail (1). The vehicle body straightening station is provided with a vehicle body straightening device (4) for straightening the vehicle body on the lifting device (3).

3. The automotive power battery connection line according to claim 2, characterized in that, The vehicle body straightening device (4) includes a bracket (41), a positioning device (42), and a straightening execution device. The bracket (41) includes a fixed part and a sliding part. The fixed part is fixed to the ground. The sliding part is slidably installed on the fixed part and can slide in the vertical direction. The fixed part is also equipped with a driving device (43) for driving the sliding part to slide. The middle part of the sliding part is provided with a lifting part (48). The position of the lifting part (48) is aligned with the position of the reinforcing beam of the vehicle body. The bottom of the lifting device (3) is provided with a positioning hole. The positioning device (42) includes a first telescopic member (421) and a first positioning pin (422). The telescopic end of the first telescopic member (421) is fixed to the fixed part with its telescopic end facing upward. The first positioning pin (422) is fixed to the telescopic end of the first telescopic member (421) and aligned with the positioning hole. The straightening execution device is installed on both sides of the lifting part (48) on the sliding part.

4. The automotive power battery pack harness of claim 3, wherein, The straightening actuator includes a first straightening block (44), a second straightening block (45), a third telescopic member (46), and a fourth telescopic member (47). The first straightening block (44) and the second straightening block (45) are respectively installed on the sliding part on both sides of the lifting part (48). The first straightening block (44) and the second straightening block (45) can slide along the length direction perpendicular to the hanging rail (1). The third telescopic member (46) and the fourth telescopic member (47) are installed on the sliding part. The telescopic ends of the third telescopic member (46) and the fourth telescopic member (47) are respectively connected to the first straightening block (44) and the second straightening block (45).

5. The automotive power battery pack harness of claim 1, wherein, The battery assembly track includes an assembly section (23), which is set at the battery assembly station. The battery assembly device (5) includes a lifting bracket (51) and a second positioning device (52). The assembly section (23) is installed on the lifting bracket (51). The bottom of the lifting device (3) is provided with a positioning hole. The second positioning device (52) includes a fifth telescopic member (521) and a second positioning pin (522). The telescopic end of the fifth telescopic member (521) is fixed to the ground facing upwards. The second positioning pin (522) is fixed to the telescopic end of the fifth telescopic member (521). The second positioning pin (522) can be inserted into the positioning hole.

6. The automotive power battery pack harness of claim 1, wherein, The battery tightening device (6) includes a robotic arm (61), a mounting bracket (62), and an electric tightener (63). The battery has a pre-set assembly bolt. The mounting bracket (62) is fixed on the robotic arm (61), and the electric tightener (63) is installed on the mounting bracket (62). The electric tightener is matched with the assembly bolt.

7. The automotive power battery pack harness of claim 1, wherein, The battery transport track (2) is also provided with a skid (22), on which the battery is placed. A separation device (7) for separating the battery from the skid (22) is also provided. The separation device (7) is located at the separation station, which is the next station after the battery tightening station. The separation station is located directly below the hanging rail (1). The battery assembly track also has a separation section (25). The separation device (7) is a second lifting bracket. The separation section (25) is installed on the second lifting bracket. An output track (26) is also provided, which is connected to the outlet of the separation section (25).

8. The automotive power battery pack harness of claim 7, wherein, A third positioning pin is also fixedly installed on the upper surface of the skid (22), and the bottom of the battery has a structural hole, and the third positioning pin is inserted into the structural hole.

9. The automotive power battery pack harness of claim 7, wherein, The battery assembly track is also provided with a fixing device (27) for determining the position of the skid (22). The fixing device (27) includes a pin and a sixth telescopic member. The sixth telescopic member is fixed on the battery assembly track and located below the upper surface of the battery assembly track. The telescopic end of the sixth telescopic member faces upward. The pin is fixedly installed on the telescopic end of the sixth telescopic member. The bottom surface of the skid (22) is also provided with a second positioning hole, and the pin can be inserted into the second positioning hole.

10. The automotive power battery pack harness of claim 1, wherein, The lifting device (3) includes a drive wheel (31) and a boom (32). The drive wheel (31) is rotatably mounted on the lifting rail (1). The upper end of the boom (32) is fixedly connected to the drive wheel (31). There are multiple booms (32). The lower end of the boom (32) is provided with a crane hook (33). The drive wheel (31) is also connected to a driving component.

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