Material transport apparatus and welding system for battery covers

Abstract

The utility model discloses a kind of material transport equipment and welding system for battery cover, material transport equipment includes: two transport lines and two transfer mechanisms, two transport lines are spaced along the first direction arrangement and all along second direction extension, multiple tray mechanisms along the second direction arrangement are equipped on each transport line, tray mechanism has the placement site for placing material, two transport lines are used to transport tray mechanism and transport direction is opposite, first transfer mechanism is used to transfer tray mechanism of first transport line offline to be online to second transport line, second transfer mechanism is used to transfer tray mechanism of second transport line offline to be online to first transport line;Wherein, two transfer mechanisms are configured, for the same transport line simultaneously online tray mechanism and offline tray mechanism. According to the material transport equipment of the utility model, the production rhythm of battery cover welding production process can be accelerated, and production efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a material transport device and a welding system for battery caps. Background Technology

[0002] In battery production, welding the battery cover is one of the manufacturing processes. The battery cover is transported via a conveyor line and welded using welding equipment. However, in related technologies, the battery cover welding process suffers from slow production cycle and low production efficiency. Therefore, how to accelerate the production cycle and improve the efficiency of the battery cover welding process is a technical problem that needs to be solved. Utility Model Content

[0003] In view of the above problems, the present invention provides a material transport device and a welding system for battery covers. The material transport device can speed up the production cycle of the battery cover welding process and improve production efficiency.

[0004] In a first aspect, this utility model provides a material transport device, comprising: two transport lines, spaced apart along a first direction and both extending along a second direction, each transport line having a plurality of pallet mechanisms arranged along the second direction, each pallet mechanism having a placement position for placing materials, the two transport lines being used to transport the pallet mechanisms in opposite directions, the second direction intersecting the first direction; and two transfer mechanisms, the two transport lines being the first transport line and the second transport line, the two transfer mechanisms being the first transfer mechanism and the second transfer mechanism, the first transfer mechanism being used to transfer the pallet mechanisms off the first transport line to the second transport line, and the second transfer mechanism being used to transfer the pallet mechanisms off the second transport line to the first transport line; wherein the two transfer mechanisms are configured to simultaneously load and unload the pallet mechanisms on the same transport line.

[0005] In the above technical solution, by setting the material transport equipment to include two transport lines and two transfer mechanisms, and setting multiple pallet mechanisms for placing materials along the transport direction of each transport line, the pallet mechanisms can be transferred between the two transport lines. The materials placed on each transport line can be welded, which can improve the material transport efficiency and welding efficiency. Furthermore, during the production process, the two transfer mechanisms can simultaneously load and unload pallet mechanisms on the same transport line. While one transfer mechanism loads a pallet mechanism onto the transport line, the other transfers a pallet mechanism off the same transport line. Loading and unloading pallet mechanisms on the same transport line can be carried out simultaneously, which can reduce or avoid the waiting time for loading or unloading pallet mechanisms on the transport line, speed up the production cycle of the battery cover welding process, and improve production efficiency.

[0006] In some embodiments, the two transfer mechanisms are configured such that, during movement between the two transport lines, one transfer mechanism is unloaded while the other transfer mechanism carries the pallet mechanism.

[0007] In the above technical solution, during the movement of the two transfer mechanisms between the two transport lines, one transfer mechanism is set up unloaded while the other transfer mechanism carries the pallet mechanism. The unloaded transfer mechanism can serve as a reserved station, and the transfer mechanism carrying the pallet mechanism can serve as a buffer station. The buffer station can transfer the buffered pallet mechanism onto the transport line, and the reserved station can receive the pallet mechanism that is being taken off the same transport line. By rationally setting up the buffer station and the reserved station, the waiting time for pallet mechanisms to be put on or taken off the transport line can be reduced or avoided, the production cycle of the battery cover welding process can be accelerated, and production efficiency can be improved.

[0008] In some embodiments, the two transfer mechanisms are configured to move in the same direction during movement between the two transport lines.

[0009] In the above technical solution, when the two transfer mechanisms move between the two transport lines, they move in the same direction. This allows the two transfer mechanisms to move toward the same transport line, enabling simultaneous loading and unloading of pallets onto and off the same transport line. This reduces the time difference between the two transfer mechanisms reaching the same transport line, thereby reducing or avoiding the waiting time for loading or unloading pallets on the transport line. This can speed up the production cycle of the battery cover welding process and improve production efficiency.

[0010] In some embodiments, the two transfer mechanisms are configured to move synchronously during movement between the two transport lines.

[0011] In the above technical solution, when the two transfer mechanisms move between the two transport lines, they move synchronously, allowing them to arrive at the same transport line at the same time. This enables the simultaneous loading and unloading of pallets onto and off the same transport line, resulting in zero time difference between the two transfer mechanisms reaching the same transport line. This further reduces or avoids the waiting time for loading or unloading pallets on the transport line, speeds up the production cycle of the battery cover welding process, and improves production efficiency.

[0012] In some embodiments, each of the transfer mechanisms may move linearly along the first direction.

[0013] In the above technical solution, by making the transfer mechanism move linearly along the first direction to realize the movement of the transfer mechanism between the two transport lines, the movement time of the transfer mechanism in a single stroke between the two transport lines can be reduced, which is conducive to further speeding up the production cycle of the battery cover welding production process and improving production efficiency.

[0014] In some embodiments, the placement orientation of the placement position on the tray mechanism is adjustable.

[0015] In the above technical solution, by making the placement direction of the placement position on the pallet mechanism adjustable, the placement direction of the material placed on the placement position can be easily adjusted, thereby facilitating welding of the material at different angles and directions. This is beneficial to improving welding efficiency and thus production efficiency.

[0016] In some embodiments, the placement positions of the pallet mechanisms on the two transport lines are oriented differently.

[0017] In the above technical solution, when the pallet mechanism is transferred from one transport line to another by the transfer mechanism, the placement direction of the placement position on the pallet mechanism can be adjusted so that the placement direction of the placement position on the pallet mechanism on the two transport lines is different. In this way, the materials on the two transport lines can be welded from different angles, which helps to improve welding efficiency and thus improve production efficiency.

[0018] In some embodiments, the plurality of pallet mechanisms include a first pallet mechanism and a second pallet mechanism, wherein the placement positions of the first pallet mechanism and the second pallet mechanism are in different orientations, and each of the transport lines is provided with a first pallet mechanism and a second pallet mechanism, and the first pallet mechanism and the second pallet mechanism on the same transport line are alternately arranged in the second direction.

[0019] In the above technical solution, by setting multiple pallet mechanisms on the same conveyor line to include alternating first pallet mechanisms and second pallet mechanisms, and with the placement directions of the first pallet mechanism and the second pallet mechanism being different, materials placed on the first pallet mechanism and materials placed on the second pallet mechanism can be welded at different angles. This eliminates the need to adjust the placement direction of the pallet mechanism, thus improving welding efficiency and production efficiency. Furthermore, it eliminates the need for a separate adjustment mechanism to adjust the placement direction, simplifying the structure of the pallet mechanism.

[0020] In some embodiments, the two transport lines are arranged in a horizontal direction.

[0021] In the above technical solution, by arranging the two transport lines in a horizontal direction, the transfer mechanism can move generally in a horizontal direction between the two transport lines, thus simplifying the movement path of the transfer mechanism.

[0022] In some embodiments, the material transport equipment includes a frame, two transport lines are mounted on the frame, and the first transfer mechanism and the second transfer mechanism are movably mounted on the frame; the frame has an upper line position and a lower line position, the upper line position includes a first upper line position and a second upper line position, the lower line position includes a first lower line position and a second lower line position, the first upper line position and the first lower line position are located on opposite sides of the first transport line along the second direction, the second upper line position and the second lower line position are located on opposite sides of the second transport line along the second direction, the first transfer mechanism is movable between the first lower line position and the second upper line position, and the second transfer mechanism is movable between the second lower line position and the first upper line position.

[0023] In the above technical solution, by setting up a frame, two transport lines and two transfer mechanisms are integrated on the frame, the material transport equipment can be assembled into a whole, and the overall structure of the material transport equipment is stable; and by setting up upper and lower positions on both sides of the transport direction of the transport lines on the frame, and by allowing the transfer mechanism to move between the upper and lower positions, it is convenient to realize the movement of the transfer mechanism between the two transport lines.

[0024] In some embodiments, the frame includes a frame body, a first track, and a second track. The first track and the second track are located on opposite sides of the transport line along the second direction. Both the first track and the second track extend along the first direction. The first transfer mechanism is slidably disposed on the first track along the first direction, and the second transfer mechanism is slidably disposed on the second track along the first direction. The first track has a first lower line position and a second upper line position at both ends along the first direction, and the second track has a second lower line position and a first upper line position at both ends along the first direction.

[0025] In the above technical solution, by setting the frame to include the frame body and the first and second tracks located on opposite sides of the transport direction of the transport line, the first track can guide the movement of the first transfer mechanism between the two transport lines, and the second track can guide the movement of the second transfer mechanism between the two transport lines, so that the transfer mechanism can move stably between the corresponding upper and lower positions according to the set direction.

[0026] In some embodiments, the transport line is an electromagnetically driven transport line and includes a first stator extending along the second direction; the transfer mechanism is an electromagnetically driven mechanism and includes a second stator; the pallet mechanism includes a pallet seat and a mover, the pallet seat being disposed on the mover, and the pallet seat having the placement position; wherein, when the transfer mechanism is located at the upper line position or the lower line position, both the first stator and the second stator are energized; when the transfer mechanism moves between the upper line position and the lower line position, both the first stator and the second stator are de-energized.

[0027] In the above technical solution, by setting the transport line as an electromagnetic drive transport line including a first stator, setting the transfer mechanism as an electromagnetic drive mechanism including a second stator, and setting the pallet mechanism as a structure including a mover, the pallet mechanism set on the transport line can be driven to move along the second direction by the magnetic force between the first stator and the mover, thereby realizing the loading or unloading of the pallet mechanism on the transport line. By using the magnetic force between the second stator and the mover, when the transfer mechanism is in the loading or unloading position, the pallet mechanism on the transfer mechanism can be transferred to the transport line or the pallet mechanism on the transport line can be transferred off the line.

[0028] In a second aspect, the present invention provides a welding system for a battery cover, comprising: a material transport device according to the first aspect embodiment of the present invention, wherein the material is a battery and the battery includes a battery cover; a first welding device and a second welding device, disposed on opposite sides of the material transport device along a first direction, wherein the first welding device is used to weld the long side of the battery cover located on the first transport line, and the second welding device is used to weld the short side of the battery cover located on the second transport line.

[0029] In the above technical solution, by setting up the aforementioned material transport equipment, materials can be transferred and switched between two transport lines. By setting up a first welding device and a second welding device, the first welding device is used to weld the long side of the battery cover located on the first transport line, and the second welding device is used to weld the short side of the battery cover located on the second transport line. Through the cooperation of the two transport lines and the two transfer mechanisms, the welding of the long and short sides of the battery cover can be realized. Furthermore, the two transfer mechanisms can simultaneously load and unload pallet mechanisms on the same transport line. While one transfer mechanism loads a pallet mechanism onto the transport line, the other transfer mechanism unloads the pallet mechanism from the same transport line. Loading and unloading pallet mechanisms on the same transport line can be carried out simultaneously, which can reduce or avoid the waiting time for loading or unloading pallet mechanisms on the transport line, accelerate the production cycle of the battery cover welding process, and improve production efficiency.

[0030] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0031] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0032] Figure 1 These are schematic diagrams of material transport equipment according to some embodiments of the present utility model;

[0033] Figure 2 yes Figure 1 A partial schematic diagram of the material transport equipment in the diagram;

[0034] Figure 3 yes Figure 1 A partial schematic diagram of the material transport equipment in the diagram.

[0035] Figure label:

[0036] 100. Material transport equipment;

[0037] 10. Rack; 11. First rail; 111. First unloading position; 112. Second loading position; 12. Second rail; 121. First loading position; 122. Second unloading position;

[0038] 21. First transport line; 22. Second transport line;

[0039] 31. First transfer mechanism; 32. Second transfer mechanism;

[0040] 41. First pallet mechanism; 42. Second pallet mechanism; 411. Pallet seat; 412. Placement position; 413. Mover. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order or hierarchy.

[0043] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "attachment," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] In this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0046] In the embodiments of this utility model, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this utility model shown in the drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this utility model.

[0047] In this utility model, "multiple" refers to two or more (including two).

[0048] In the embodiments of this utility model, unless otherwise specified, all embodiments and optional embodiments of this utility model can be combined with each other to form new technical solutions.

[0049] In the embodiments of this utility model, unless otherwise specified, all technical features and optional features of this utility model are described herein.

[0050] In battery production, welding the battery cover is one of the manufacturing processes. The battery cover is transported via a conveyor line and welded using welding equipment. However, in related technologies, the battery cover welding process suffers from slow production cycle and low production efficiency. Therefore, how to accelerate the production cycle and improve the efficiency of the battery cover welding process is a technical problem that needs to be solved.

[0051] Based on this, the present invention proposes a material transport device, comprising: two transport lines and two transfer mechanisms. The two transport lines are arranged at intervals along a first direction and both transport lines extend along a second direction. Each transport line is provided with multiple pallet mechanisms arranged along the second direction. Each pallet mechanism has a placement position for placing materials. The two transport lines are used to transport the pallet mechanisms and the transport directions are opposite, with the second direction intersecting the first direction. The two transport lines are respectively the first transport line and the second transport line, and the two transfer mechanisms are respectively the first transfer mechanism and the second transfer mechanism. The first transfer mechanism is used to transfer the pallet mechanisms that are offline from the first transport line to the second transport line, and the second transfer mechanism is used to transfer the pallet mechanisms that are offline from the second transport line to the first transport line. The two transfer mechanisms are configured to simultaneously load and unload pallet mechanisms on the same transport line.

[0052] In the above technical solution, by setting the material transport equipment to include two transport lines and two transfer mechanisms, and setting multiple pallet mechanisms for placing materials along the transport direction of each transport line, the pallet mechanisms can be transferred between the two transport lines. The materials placed on each transport line can be welded, which can improve the material transport efficiency and welding efficiency. Furthermore, during the production process, the two transfer mechanisms can simultaneously load and unload pallet mechanisms on the same transport line. While one transfer mechanism loads a pallet mechanism onto the transport line, the other transfers a pallet mechanism off the same transport line. Loading and unloading pallet mechanisms on the same transport line can be carried out simultaneously, which can reduce or avoid the waiting time for loading or unloading pallet mechanisms on the transport line, speed up the production cycle of the battery cover welding process, and improve production efficiency.

[0053] The following is for reference. Figures 1-3 This invention describes a material transport device 100 according to an embodiment of the present invention.

[0054] refer to Figure 1 In a first aspect, the present invention provides a material transport device 100, comprising: two transport lines and two transfer mechanisms. The two transport lines are arranged at intervals along a first direction and both transport lines extend along a second direction. Each transport line is provided with multiple pallet mechanisms arranged along the second direction. Each pallet mechanism has a placement position 412 for placing materials. The two transport lines are used to transport the pallet mechanisms and the transport directions are opposite, with the second direction intersecting the first direction. The two transport lines are a first transport line 21 and a second transport line 22, and the two transfer mechanisms are a first transfer mechanism 31 and a second transfer mechanism 32. The first transfer mechanism 31 is used to transfer pallet mechanisms off the first transport line 21 onto the second transport line 22, and the second transfer mechanism 32 is used to transfer pallet mechanisms off the second transport line 22 onto the first transport line 21. The two transfer mechanisms are configured to simultaneously load and unload pallet mechanisms onto the same transport line.

[0055] The two transport lines can extend in a straight line in the second direction; for example, the two transport lines can be set up in parallel.

[0056] The two transport lines can be the same length, or the two transport lines can be the same width, or the two transport lines can be identical.

[0057] Both transport lines are parallel to the second direction, but their transport directions are opposite. For example, when the second direction is left-right, one transport line is traveling to the left (e.g., the first transport line 21 is traveling to the left), and the other transport line is traveling to the right (e.g., the second transport line 22 is traveling to the right).

[0058] The first direction can be referred to as direction e1 in the attached diagram, and the second direction can be referred to as direction e2 in the attached diagram. For example, the first and second directions can be set perpendicularly, the first direction can be a front-back direction, and the second direction can be a left-right direction.

[0059] Multiple pallet mechanisms on each transport line are arranged sequentially along the length of the transport line. For example, multiple pallet mechanisms on each transport line can be arranged sequentially from one end of the transport line to the other end of the transport line.

[0060] The pallet mechanism has a placement position 412 for placing materials, and materials can be loaded onto the placement position 412 of the pallet mechanism by a feeding device. Each of the aforementioned transport lines is used to transport the pallet mechanism, and the pallet mechanism can move along the length of the transport line. When materials are placed on the placement position 412 of the pallet mechanism, each transport line is simultaneously transporting the pallet mechanism and the materials. Through the transport action of the transport lines, the pallet mechanism can be transported from one end of the transport line to the other end of the transport line, and thus the materials on the pallet mechanism can be transported from one end of the transport line to the other end of the transport line.

[0061] The transfer mechanism is used to move and switch the pallet mechanism between two transport lines. When there are materials on the pallet mechanism, the movement of the transfer mechanism can realize the transfer and switching of materials between the two transport lines, so that the materials can be subjected to different welding processes on the two transport lines, thereby improving welding efficiency and thus improving production efficiency.

[0062] For example, when the material transport equipment 100 is operating, the first transfer mechanism 31 and the second transfer mechanism 32 move from the first transport line 21 to the second transport line 22. For instance, the first transfer mechanism 31 and the second transfer mechanism 32 move to opposite sides of the second transport line 22 along a second direction. Along the second direction, from the first transfer mechanism 31 to the second transfer mechanism 32, the second transport line 22 transports pallet mechanisms located on it. The first transfer mechanism 31 carries the pallet mechanisms and transfers them onto the second transport line 22. Simultaneously, pallet mechanisms on the second transport line 22 are transferred off the line to the second transfer mechanism 32. This allows the two transfer mechanisms to simultaneously load and unload pallet mechanisms onto and off the second transport line 22. This simultaneous loading and unloading of pallet mechanisms on the second transport line 22 reduces or avoids waiting time, speeds up the production cycle of the battery cover welding process, and improves production efficiency.

[0063] Then, the first transfer mechanism 31 and the second transfer mechanism 32 move from the second transport line 22 to the first transport line 21. For example, the first transfer mechanism 31 and the second transfer mechanism 32 move to opposite sides of the first transport line 21 along the second direction. Along the second direction and in the direction from the second transfer mechanism 32 to the first transfer mechanism 31, the first transport line 21 transports the pallet mechanism located on the first transport line 21. At this time, the second transfer mechanism 32 carries the pallet mechanism and transfers the pallet mechanism carried on it onto the first transport line 21. At the same time, the pallet mechanism on the first transport line 21 is transferred off the line to the first transfer mechanism 31. This allows the two transfer mechanisms to simultaneously load and unload pallet mechanisms onto and off the first transport line 21. In this way, the first transport line 21 can simultaneously load and unload pallet mechanisms, which can reduce or avoid the waiting time for loading or unloading pallet mechanisms, speed up the production cycle of the battery cover welding process, and improve production efficiency.

[0064] Subsequently, it can be determined whether to continue repeating the above steps and the number of times to repeat them, as needed.

[0065] In the above technical solution, by configuring the material transport equipment 100 to include two transport lines and two transfer mechanisms, and by arranging multiple pallet mechanisms for placing materials along the transport direction of each transport line, the pallet mechanisms can be transferred between the two transport lines. Materials placed on each transport line can be welded, which can improve the material transport efficiency and welding efficiency. Furthermore, during the production process, the two transfer mechanisms can simultaneously load and unload pallet mechanisms on the same transport line. While one transfer mechanism loads a pallet mechanism onto the transport line, the other transfer mechanism unloads a pallet mechanism from the same transport line. Loading and unloading pallet mechanisms on the same transport line can be carried out simultaneously, which can reduce or avoid the waiting time for loading or unloading pallet mechanisms on the transport line, accelerate the production cycle of the battery cover welding process, and improve production efficiency.

[0066] In some embodiments, the two transfer mechanisms are configured such that, during movement between two transport lines, one transfer mechanism is set up unloaded while the other transfer mechanism carries the pallet mechanism.

[0067] The transfer mechanism is set up without a pallet. This type of transfer mechanism can be used as a reserved workstation to provide a reserved workstation for the pallet mechanism to be taken off the line on the transportation line.

[0068] The transfer mechanism carrying the pallet mechanism is transferred from the loading and unloading of the transport line. The transfer mechanism carrying the pallet mechanism can serve as a buffer station for the pallet mechanism loading and unloading of the transport line.

[0069] In the above technical solution, during the movement of the two transfer mechanisms between the two transport lines, one transfer mechanism is set up unloaded while the other transfer mechanism carries the pallet mechanism. The unloaded transfer mechanism can serve as a reserved station, and the transfer mechanism carrying the pallet mechanism can serve as a buffer station. The buffer station can transfer the buffered pallet mechanism onto the transport line, and the reserved station can receive the pallet mechanism that is being taken off the same transport line. By rationally setting up the buffer station and the reserved station, the waiting time for pallet mechanisms to be put on or taken off the transport line can be reduced or avoided, the production cycle of the battery cover welding process can be accelerated, and production efficiency can be improved.

[0070] In some embodiments, the two transfer mechanisms are configured to move in the same direction during movement between the two transport lines.

[0071] For example, during the movement between two transport lines, the two transfer mechanisms move in the same direction, which may include: both transfer mechanisms moving along the first direction and toward the first transport line 21, or both transfer mechanisms moving along the first direction and toward the second transport line 22.

[0072] In the above technical solution, when the two transfer mechanisms move between the two transport lines, they move in the same direction. This allows the two transfer mechanisms to move toward the same transport line, enabling simultaneous loading and unloading of pallets onto and off the same transport line. This reduces the time difference between the two transfer mechanisms reaching the same transport line, thereby reducing or avoiding the waiting time for loading or unloading pallets on the transport line. This can speed up the production cycle of the battery cover welding process and improve production efficiency.

[0073] In some embodiments, the two transfer mechanisms are configured to move synchronously during movement between the two transport lines.

[0074] For example, during the movement between the two transport lines, the synchronous movement of the two transfer mechanisms can include: during the movement of both transfer mechanisms along the first direction and toward the first transport line 21, the two transfer mechanisms move at the same speed and move simultaneously, and at the same time point, the distance between the two transfer mechanisms and the first transport line 21 in the first direction is the same; or, during the movement of both transfer mechanisms along the first direction and toward the second transport line 22, the two transfer mechanisms move at the same speed and move simultaneously, and at the same time point, the distance between the two transfer mechanisms and the second transport line 22 in the first direction is the same.

[0075] In the above technical solution, when the two transfer mechanisms move between the two transport lines, they move synchronously, allowing them to arrive at the same transport line at the same time. This enables the simultaneous loading and unloading of pallets onto and off the same transport line, resulting in zero time difference between the two transfer mechanisms reaching the same transport line. This further reduces or avoids the waiting time for loading or unloading pallets on the transport line, speeds up the production cycle of the battery cover welding process, and improves production efficiency.

[0076] In some embodiments, each transfer mechanism may move linearly along a first direction.

[0077] The transfer mechanism's journey from one transport line to another is a single trip.

[0078] In the above technical solution, by making the transfer mechanism move linearly along the first direction to realize the movement of the transfer mechanism between the two transport lines, the movement time of the transfer mechanism in a single stroke between the two transport lines can be reduced, which is conducive to further speeding up the production cycle of the battery cover welding production process and improving production efficiency.

[0079] In some embodiments, the placement orientation of the placement position 412 on the tray mechanism is adjustable.

[0080] The placement position 412 can be rotated to adjust its orientation. For example, the placement position 412 can be rotated 90 degrees to adjust its orientation.

[0081] For example, the tray mechanism may include an adjustment drive mechanism for driving the placement position 412 to rotate. The adjustment drive mechanism is connected to the placement position 412 so as to drive the placement position 412 to rotate in order to adjust the placement orientation of the placement position 412.

[0082] For example, a robot with a rotating mechanism can be set up. The robot's robotic arm has a rotating mechanism at its end. The robotic arm can grasp the tray mechanism and rotate the tray mechanism. After rotating it to the set placement direction, it can be released.

[0083] In the above technical solution, by making the placement direction of the placement position 412 on the pallet mechanism adjustable, the placement direction of the material placed on the placement position 412 can be easily adjusted, thereby facilitating welding of the material at different angles and directions, which helps to improve welding efficiency and thus improve production efficiency.

[0084] In some embodiments, the placement positions 412 of the pallet mechanisms on the two transport lines are placed in different directions.

[0085] For example, the pallet mechanism placement position 412 on the first transport line 21 is placed in the first placement direction, and the pallet mechanism placement position 412 on the second transport line 22 is placed in the second placement direction. The second placement direction is different from the first placement direction, for example, the angle between the second placement direction and the first placement direction is 90 degrees.

[0086] Specifically, before the pallet mechanism is carried on the transfer mechanism and the pallet mechanism is transferred to the first transport line 21, the placement direction of the placement position 412 on the pallet mechanism can be adjusted to the first placement direction; before the pallet mechanism is carried on the transfer mechanism and the pallet mechanism is transferred to the second transport line 22, the placement direction of the placement position 412 on the pallet mechanism can be adjusted to the second placement direction.

[0087] In the above technical solution, when the pallet mechanism is transferred from one transport line to another by the transfer mechanism, the placement direction of the placement position 412 on the pallet mechanism can be adjusted so that the placement direction of the placement position 412 on the pallet mechanism on the two transport lines is different. In this way, the materials on the two transport lines can be welded from different angles, which is beneficial to improving welding efficiency and thus improving production efficiency.

[0088] In some embodiments, refer to Figures 1-3 The multiple pallet mechanisms include a first pallet mechanism 41 and a second pallet mechanism 42. The placement positions 412 of the first pallet mechanism 41 and the second pallet mechanism 42 are placed in different directions. Each transport line is provided with a first pallet mechanism 41 and a second pallet mechanism 42. The first pallet mechanism 41 and the second pallet mechanism 42 on the same transport line are arranged alternately in the second direction.

[0089] For example, the placement direction of the placement position 412 on the first pallet mechanism 41 is the first placement direction, and the placement direction of the placement position 412 on the second pallet mechanism 42 is the second placement direction. The second placement direction is different from the first placement direction. For example, the angle between the second placement direction and the first placement direction is 90 degrees.

[0090] The alternating arrangement of the first pallet mechanism 41 and the second pallet mechanism 42 on the same transport line in the second direction includes: the first pallet mechanism 41 and the second pallet mechanism 42 on the first transport line 21 are arranged alternately in the second direction, and the first pallet mechanism 41 and the second pallet mechanism 42 on the second transport line 22 are arranged alternately in the second direction.

[0091] Materials on the first pallet mechanism 41 on the first transport line 21 and on the second pallet mechanism 42 on the second transport line 22 can be welded; materials on the first pallet mechanism 41 and the second pallet mechanism 42 on the first transport line 21 can be exchanged, for example by robot grabbing and exchanging; materials on the first pallet mechanism 41 and the second pallet mechanism 42 on the second transport line 22 can also be exchanged, for example by robot grabbing and exchanging; then, materials on the first pallet mechanism 41 on the first transport line 21 and on the second pallet mechanism 42 on the second transport line 22 can be welded again. This allows each material to be welded from different angles and directions.

[0092] In the above technical solution, by setting multiple pallet mechanisms on the same conveyor line to include alternating first pallet mechanism 41 and second pallet mechanism 42, and the placement directions of the placement positions 412 of the first pallet mechanism 41 and the second pallet mechanism 42 are different, the materials placed on the first pallet mechanism 41 and the materials placed on the second pallet mechanism 42 can be welded in different angle directions. This eliminates the need to adjust the placement direction of the placement positions 412 on the pallet mechanism, which can achieve welding of materials in different angle directions. This also helps to improve welding efficiency, thereby improving production efficiency. Furthermore, it eliminates the need for a separate adjustment mechanism for adjusting the placement direction of the placement positions 412, which simplifies the structure of the pallet mechanism.

[0093] In some embodiments, refer to Figure 1 The two transport lines are arranged horizontally.

[0094] For example, the first direction is the front-to-back direction, and the two transport lines are arranged along the front-to-back direction.

[0095] For example, the two transport lines can be at the same height.

[0096] In the above technical solution, by arranging the two transport lines in a horizontal direction, the transfer mechanism can move generally in a horizontal direction between the two transport lines, thus simplifying the movement path of the transfer mechanism.

[0097] In some embodiments, refer to Figures 1-3The material transport equipment 100 includes a frame 10, with two transport lines installed on the frame 10. A first transfer mechanism 31 and a second transfer mechanism 32 are movably mounted on the frame 10. The frame 10 has an upper line position and a lower line position. The upper line position includes a first upper line position 121 and a second upper line position 112, and the lower line position includes a first lower line position 111 and a second lower line position 122. The first upper line position 121 and the first lower line position 111 are located on opposite sides of the first transport line 21 along the second direction, and the second upper line position 112 and the second lower line position 122 are located on opposite sides of the second transport line 22 along the second direction. The first transfer mechanism 31 is movable between the first lower line position 111 and the second upper line position 112, and the second transfer mechanism 32 is movable between the second lower line position 122 and the first upper line position 121.

[0098] For example, when the material transport equipment 100 is operating, the first transfer mechanism 31 moves along the first direction to the second upper line position 112, while the second transfer mechanism 32 moves along the first direction to the second lower line position 122. Along the second direction, from the first transfer mechanism 31 to the second transfer mechanism 32, the second transport line 22 transports pallet mechanisms located on the second transport line 22. The first transfer mechanism 31 carries the pallet mechanism, transferring it from the upper line to the second transport line 22. Simultaneously, the pallet mechanism on the second transport line 22 is transferred from the lower line to the second transfer mechanism 32. This allows both transfer mechanisms to simultaneously load and unload pallet mechanisms onto and off the second transport line 22. This simultaneous loading and unloading of pallet mechanisms on the second transport line 22 reduces or avoids waiting time, speeds up the production cycle of the battery cover welding process, and improves production efficiency.

[0099] Then, the first transfer mechanism 31 moves from the second upper line position 112 to the first lower line position 111. Simultaneously, the second transfer mechanism 32 moves from the second lower line position 122 to the first upper line position 121. Along the second direction, from the second transfer mechanism 32 to the first transfer mechanism 31, the first transport line 21 transports the pallet mechanism located on it. At this time, the second transfer mechanism 32 carries the pallet mechanism, transferring it from the second transfer mechanism 32 to the first transport line 21. Simultaneously, the pallet mechanism on the first transport line 21 is transferred from the lower line to the first transfer mechanism 31. This allows both transfer mechanisms to simultaneously load and unload pallet mechanisms onto and off the first transport line 21. This simultaneous loading and unloading of pallet mechanisms on the first transport line 21 reduces or avoids waiting time, speeds up the battery cover welding process, and improves production efficiency.

[0100] Subsequently, it can be determined whether to continue repeating the above steps and the number of times to repeat them, as needed.

[0101] In the above technical solution, the two transport lines and two transfer mechanisms are integrated on the frame 10, so that the material transport equipment 100 can be assembled into a whole and the overall structure of the material transport equipment 100 is stable. Furthermore, by setting the upper and lower positions on both sides of the transport direction of the transport lines on the frame 10, and by allowing the transfer mechanism to move between the upper and lower positions, it is convenient to realize the movement of the transfer mechanism between the two transport lines.

[0102] In some embodiments, refer to Figures 1-3 The frame 10 includes a frame 10 body, a first track 11 and a second track 12. The first track 11 and the second track 12 are located on opposite sides of the transport line along the second direction. Both the first track 11 and the second track 12 extend along the first direction. The first transfer mechanism 31 is slidably disposed on the first track 11 along the first direction, and the second transfer mechanism 32 is slidably disposed on the second track 12 along the first direction. The first track 11 has a first lower line position 111 and a second upper line position 112 at both ends along the first direction, and the second track 12 has a second lower line position 122 and a first upper line position 121 at both ends along the first direction.

[0103] When the first transfer mechanism 31 slides along the first track 11, the first transfer mechanism 31 can switch between the first lower line position 111 and the second upper line position 112; when the second transfer mechanism 32 slides along the second track 12, the second transfer mechanism 32 can switch between the second lower line position 122 and the first upper line position 121.

[0104] The direction from the second track 12 to the first track 11 is the transport direction of the first transport line 21, and the direction from the first track 11 to the second track 12 is the transport direction of the second transport line 22.

[0105] In the above technical solution, by setting the frame 10 to include the frame 10 body and the first track 11 and the second track 12 located on opposite sides of the transport direction of the transport line, the first track 11 can guide the movement of the first transfer mechanism 31 between the two transport lines, and the second track 12 can guide the movement of the second transfer mechanism 32 between the two transport lines, so that the transfer mechanism can move stably between the corresponding upper and lower positions according to the set direction.

[0106] In some embodiments, refer to Figures 1-3The transport line is an electromagnetically driven transport line and includes a first stator extending along a second direction. The transfer mechanism is an electromagnetically driven mechanism and includes a second stator. The pallet mechanism includes a pallet seat 411 and a mover 413. The pallet seat 411 is disposed on the mover 413 and has a placement position 412. When the transfer mechanism is in the upper or lower position, both the first and second stators are energized. When the transfer mechanism moves between the upper and lower positions, both the first and second stators are de-energized.

[0107] When the first stator is energized, it generates a magnetic force on the mover 413, thereby enabling the transport line to exert a driving force on the pallet mechanism located on the transport line, thus driving the pallet mechanism to move along the second direction. For example, the first transport line 21 can exert a driving force on the pallet mechanism located on the first transport line 21, thus driving the pallet mechanism on the first transport line 21 to move along the transport direction of the first transport line 21; the second transport line 22 can exert a driving force on the pallet mechanism located on the second transport line 22, thus driving the pallet mechanism on the second transport line 22 to move along the transport direction of the second transport line 22.

[0108] When the second stator is energized, the second stator can generate a magnetic force on the mover 413, thereby enabling the transfer mechanism to have a driving force on the pallet mechanism located on the transfer mechanism, thereby driving the pallet mechanism on the transfer mechanism to move in the second direction to transfer to the transport line, or driving the pallet mechanism that is going up or down from the transport line to move onto the transfer mechanism.

[0109] For example, when the material transport equipment 100 is working, the first transfer mechanism 31 moves along the first direction to the second upper line position 112, and at the same time, the second transfer mechanism 32 moves along the first direction to the second lower line position 122. Both the first and second stators are energized. Along the second direction, from the first track 11 to the second track 12, the second transport line 22 uses magnetic drive to transport the pallet mechanism located on the second transport line 22. The first transfer mechanism 31 carries the pallet mechanism, and uses magnetic drive to transfer the pallet mechanism carried on it onto the second transport line 22. Simultaneously, using magnetic drive, the pallet mechanism on the second transport line 22 is transferred off the line to the second transfer mechanism 32. This allows the two transfer mechanisms to simultaneously load and unload pallet mechanisms onto and off the second transport line 22. This simultaneous loading and unloading of pallet mechanisms on the second transport line 22 reduces or avoids waiting time for loading or unloading pallet mechanisms, speeds up the production cycle of the battery cover welding process, and improves production efficiency.

[0110] Then, the first transfer mechanism 31 moves from the second upper line position 112 to the first lower line position 111. Simultaneously, the second transfer mechanism 32 moves from the second lower line position 122 to the first upper line position 121. Along the second direction, from the second transfer mechanism 32 to the first transfer mechanism 31, the first transport line 21 uses magnetic force to transport the tray mechanism located on the first transport line 21. At this time, the second transfer mechanism 32 carries the tray mechanism. The second transfer mechanism 32 uses magnetic force to transfer the tray mechanism carried on it onto the first transport line 21. Simultaneously, using magnetic force, the tray mechanism on the first transport line 21 is transferred off the line to the first transfer mechanism 31. This allows the two transfer mechanisms to simultaneously load and unload the tray mechanism onto the first transport line 21. This simultaneous loading and unloading of the tray mechanism onto the first transport line 21 reduces or avoids waiting time for loading or unloading the tray mechanism, speeds up the production cycle of the battery cover welding process, and improves production efficiency.

[0111] Subsequently, it can be determined whether to continue repeating the above steps and the number of times to repeat them, as needed.

[0112] In the above technical solution, by setting the transport line as an electromagnetic drive transport line including a first stator, setting the transfer mechanism as an electromagnetic drive mechanism including a second stator, and setting the pallet mechanism as a structure including a mover 413, the pallet mechanism set on the transport line can be driven to move along the second direction by the magnetic force between the first stator and the mover 413, thereby realizing the loading or unloading of the pallet mechanism on the transport line. By using the magnetic force between the second stator and the mover 413, when the transfer mechanism is in the loading or unloading position, the pallet mechanism on the transfer mechanism can be transferred to the transport line or the pallet mechanism on the transport line can be transferred off the line.

[0113] Secondly, this utility model provides a welding system for a battery cover, comprising: a material transport device 100 according to the first aspect embodiment of this utility model, a first welding device, and a second welding device. The material is a battery, and the battery includes a battery cover. The first welding device and the second welding device are disposed on opposite sides of the material transport device 100 along a first direction. The first welding device is used to weld the long side of the battery cover located on a first transport line 21, and the second welding device is used to weld the short side of the battery cover located on a second transport line 22.

[0114] The first welding device and the second welding device are used to weld the battery cover to the battery casing. The battery cover is rectangular and has a long side and a short side. The first welding device is used to weld the long side of the battery cover to the battery casing, and the second welding device is used to weld the short side of the battery cover to the battery casing.

[0115] During the movement of the transfer mechanism between the two transport lines, the first welding equipment can weld the long side of the battery cover on the first pallet mechanism 41 on the first transport line 21, and the second welding equipment can weld the short side of the battery cover on the second pallet mechanism 42 on the second transport line 22.

[0116] In the above technical solution, by setting up the material transport equipment 100, the material can be transferred and switched between two transport lines. By setting up a first welding device and a second welding device, the first welding device is used to weld the long side of the battery cover located on the first transport line 21, and the second welding device is used to weld the short side of the battery cover located on the second transport line 22. Through the cooperation of the two transport lines and the two transfer mechanisms, the welding of the long and short sides of the battery cover can be realized. Furthermore, the two transfer mechanisms can simultaneously load and unload pallet mechanisms on the same transport line. While one transfer mechanism loads the pallet mechanism onto the transport line, the other transfer mechanism unloads the pallet mechanism from the same transport line. Loading and unloading pallet mechanisms on the same transport line can be carried out simultaneously, which can reduce or avoid the waiting time for loading or unloading pallet mechanisms on the transport line, accelerate the production cycle of the battery cover welding process, and improve production efficiency.

[0117] The following reference Figures 1-3 This invention describes a material handling device 100 and a welding system according to some embodiments of the present invention.

[0118] Reference Figures 1-3 In this embodiment, the welding system includes a material transport device 100, a first welding device, and a second welding device. The material transport device 100 includes the aforementioned frame 10, a first transport line 21, a second transport line 22, a first transfer mechanism 31, and a second transfer mechanism 32.

[0119] The first transport line 21 and the second transport line 22 are mounted on the frame 10 and arranged at intervals along the first direction. Both the first transport line 21 and the second transport line 22 are electromagnetically driven transport lines. Multiple pallet mechanisms are provided on both the first transport line 21 and the second transport line 22. The multiple pallet mechanisms on the first transport line 21 include alternating first pallet mechanisms 41 and second pallet mechanisms 42 arranged along the second direction.

[0120] The frame 10 includes a frame 10 body, a first track 11, and a second track 12, which are located on opposite sides of the transport line along a second direction. A first transfer mechanism 31 is slidably disposed on the first track 11 along a first direction, and a second transfer mechanism 32 is slidably disposed on the second track 12 along a first direction. The first track 11 has a first lower line position 111 and a second upper line position 112 at both ends along the first direction, and the second track 12 has a second lower line position 122 and a first upper line position 121 at both ends along the first direction. Both the first transfer mechanism 31 and the second transfer mechanism 32 are electromagnetic drive mechanisms. The pallet mechanism includes a pallet seat 411 and a mover 413, with the pallet seat 411 disposed on the mover 413 and having a placement position 412.

[0121] For example, the working process of the material transport equipment 100 and the welding system in this embodiment can be as follows.

[0122] The first transfer mechanism 31 moves along the first direction to the second upper line position 112, while the second transfer mechanism 32 moves along the first direction to the second lower line position 122. Both the first and second stators are energized. Along the second direction, from the first track 11 to the second track 12, the second transport line 22 uses magnetic drive to transport the tray mechanism located on it. The first transfer mechanism 31 carries the tray mechanism, and uses magnetic drive to transfer the tray mechanism onto the second transport line 22. Simultaneously, using magnetic drive, the tray mechanism on the second transport line 22 is transferred off the line to the second transfer mechanism 32. This allows both transfer mechanisms to simultaneously load and unload tray mechanisms onto and off the second transport line 22. This simultaneous loading and unloading of tray mechanisms on the second transport line 22 reduces or eliminates waiting time, speeds up the battery cover welding process, and improves production efficiency.

[0123] Then, the first transfer mechanism 31 moves from the second upper line position 112 to the first lower line position 111. Simultaneously, the second transfer mechanism 32 moves from the second lower line position 122 to the first upper line position 121. Along the second direction, from the second transfer mechanism 32 to the first transfer mechanism 31, the first transport line 21 uses magnetic force to transport the tray mechanism located on the first transport line 21. At this time, the second transfer mechanism 32 carries the tray mechanism. The second transfer mechanism 32 uses magnetic force to transfer the tray mechanism carried on it onto the first transport line 21. Simultaneously, using magnetic force, the tray mechanism on the first transport line 21 is transferred off the line to the first transfer mechanism 31. This allows the two transfer mechanisms to simultaneously load and unload the tray mechanism onto the first transport line 21. This simultaneous loading and unloading of the tray mechanism onto the first transport line 21 reduces or avoids waiting time for loading or unloading the tray mechanism, speeds up the production cycle of the battery cover welding process, and improves production efficiency.

[0124] During the movement of the transfer mechanism between the two transport lines, the first welding equipment can weld the long side of the battery cover on the first pallet mechanism 41 on the first transport line 21, and the second welding equipment can weld the short side of the battery cover on the second pallet mechanism 42 on the second transport line 22.

[0125] Subsequently, it can be determined whether to continue repeating the above steps and the number of times to repeat them, as needed.

[0126] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0127] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A material conveying device, characterized in that, include: Two transport lines are arranged at intervals along a first direction and both extend along a second direction. Each transport line is provided with multiple pallet mechanisms arranged along the second direction. Each pallet mechanism has a placement position for placing materials. The two transport lines are used to transport the pallet mechanisms and the transport directions are opposite. The second direction intersects the first direction. Two transfer mechanisms are provided, and the two transport lines are a first transport line and a second transport line, respectively. The two transfer mechanisms are a first transfer mechanism and a second transfer mechanism, respectively. The first transfer mechanism is used to transfer the pallet mechanism that is offline from the first transport line to the second transport line, and the second transfer mechanism is used to transfer the pallet mechanism that is offline from the second transport line to the first transport line. The two transfer mechanisms are configured to simultaneously load and unload the pallet onto the same transport line.

2. The material transport equipment according to claim 1, characterized in that, The two transfer mechanisms are configured such that, during movement between the two transport lines, one of the transfer mechanisms is unloaded while the other transfer mechanism carries the pallet mechanism.

3. The material transport equipment according to claim 1, characterized in that, The two transfer mechanisms are configured to move in the same direction during their movement between the two transport lines.

4. The material transport equipment according to claim 1, characterized in that, The two transfer mechanisms are configured to move synchronously during their movement between the two transport lines.

5. The material conveying equipment according to claim 1, characterized in that, Each of the transfer mechanisms can move linearly along the first direction.

6. The material transport equipment according to claim 1, characterized in that, The placement orientation of the placement position on the tray mechanism is adjustable.

7. The material conveying equipment according to claim 6, characterized in that, The placement positions of the pallet mechanisms on the two transport lines are oriented differently.

8. The material transport equipment according to claim 1, characterized in that, The plurality of pallet mechanisms include a first pallet mechanism and a second pallet mechanism. The placement positions of the first pallet mechanism and the second pallet mechanism are in different directions. Each of the transport lines is provided with a first pallet mechanism and a second pallet mechanism. The first pallet mechanism and the second pallet mechanism on the same transport line are arranged alternately in the second direction.

9. The material transport equipment according to claim 1, characterized in that, The two transport lines are arranged horizontally.

10. The material transport equipment according to any one of claims 1-9, characterized in that, Includes a frame, both of the two transport lines are mounted on the frame, and the first transfer mechanism and the second transfer mechanism are movably mounted on the frame; The frame has an upper line position and a lower line position. The upper line position includes a first upper line position and a second upper line position. The lower line position includes a first lower line position and a second lower line position. The first upper line position and the first lower line position are located on opposite sides of the first transport line along the second direction. The second upper line position and the second lower line position are located on opposite sides of the second transport line along the second direction. The first transfer mechanism is movable between the first lower line position and the second upper line position. The second transfer mechanism is movable between the second lower line position and the first upper line position.

11. The material conveying equipment according to claim 10, characterized in that, The frame includes a frame body, a first track, and a second track. The first track and the second track are located on opposite sides of the transport line along the second direction. Both the first track and the second track extend along the first direction. The first transfer mechanism is slidably disposed on the first track along the first direction, and the second transfer mechanism is slidably disposed on the second track along the first direction. The first track has a first lower line position and a second upper line position at both ends along the first direction, and the second track has a second lower line position and a first upper line position at both ends along the first direction.

12. The material conveying equipment according to claim 10, characterized in that, The transport line is an electromagnetically driven transport line and includes a first stator extending along the second direction; the transfer mechanism is an electromagnetically driven mechanism and includes a second stator; the pallet mechanism includes a pallet seat and a mover, the pallet seat is disposed on the mover, and the pallet seat has the placement position. When the transfer mechanism is located at the upper or lower position, both the first and second stators are energized; when the transfer mechanism moves between the upper and lower positions, both the first and second stators are de-energized.

13. A welding system for a battery cover, characterized in that, include: The material transport equipment according to any one of claims 1-12, wherein the material is a battery, and the battery includes a battery cover; A first welding device and a second welding device are disposed on opposite sides of the material transport device along the first direction. The first welding device is used to weld the long side of the battery cover located on the first transport line, and the second welding device is used to weld the short side of the battery cover located on the second transport line.

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