Anti-towing device of battery end cover and battery production line

Abstract

The utility model relates to the technical field of battery manufacturing, and provides an anti-towing device for a battery end cover and a battery production line. The telescopic mechanism is mounted on the mounting base, the telescopic mechanism comprises a telescopic piece capable of stretching in the first direction, and the telescopic piece has a contracted state and an extended state; the blocking assembly is installed on the telescopic piece, the blocking assembly comprises a blocking block, and the blocking block is used for stretching into the position between the pushing head and the end cover in the stretching state and separating from the position between the pushing head and the end cover in the contracting state; wherein an included angle is formed between the first direction and the moving direction of the push head. According to the anti-towing device provided by the invention, after the cover closing pre-welding of the battery end cover is completed and before the push head retracts, the telescopic piece of the telescopic mechanism is converted from the contraction state to the stretching state, so that the stop block extends into the space between the push head and the end cover, and in the retraction process of the push head, the end cover is prevented from being towed down by the push head in the continuous retraction process of the push head.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to an anti-drag device for a battery end cover and a battery production line. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] The end caps of cylindrical lithium batteries, also known as caps, seal the ends of the battery can. Their purpose is to prevent electrolyte leakage and the ingress of foreign matter. The end caps are typically connected to the battery can via welding, a process that includes pre-spot welding and welding. Laser welds are used to create a sealed joint between the battery can and the end caps to achieve a seal.

[0004] During the pre-spot welding process for the end caps of cylindrical lithium batteries, the end caps must first be placed in the receiving groove of a pusher head. The pusher head then pushes the end caps into contact with the battery can body, and then the welding head is used to pre-spot weld the end caps. After the pre-spot welding is completed, the pusher head is retracted and disengaged from the end caps. However, when the end caps are tilted relative to the pusher head, they can easily become stuck in the receiving grooves. During the retraction process, the pusher head can easily drag the end caps with it, tearing the welds and causing the end caps to fall off. Utility Model Content

[0005] The purpose of this application is to provide a battery end cap anti-dragging device and a battery production line to prevent the end cap or the entire battery from being dragged off during the retraction of the pusher head after pre-welding the battery end cap. This purpose is achieved through the following technical solutions:

[0006] In the first aspect, the present application provides an anti-drag device for a battery end cover, comprising: a mounting seat; a telescopic mechanism, mounted on the mounting seat, the telescopic mechanism comprising a telescopic part that can be telescoped along a first direction, the telescopic part having a retracted state and an extended state; a blocking assembly, mounted on the telescopic part, the blocking assembly comprising a blocking block, the blocking block being used to extend between the push head and the end cover when the telescopic part is in the extended state, and to disengage from between the push head and the end cover when the telescopic part is in the retracted state; wherein the first direction forms an angle with the moving direction of the push head.

[0007] According to the anti-drag device provided by the present application, after the pre-welding of the battery end cover is completed, before the push head retracts, the telescopic part of the telescopic mechanism is transformed from a contracted state to an extended state, so that the blocking block is extended between the push head and the end cover. During the retraction of the push head, the blocking block blocks the end cover from moving with the push head, thereby preventing the end cover from being dragged off by the push head during the continuous retraction of the push head.

[0008] In addition, the anti-drag device provided by this application may also have the following additional technical features:

[0009] In some embodiments of the present application, the telescopic mechanism further includes a support member, the telescopic member is slidably disposed on the support member; the mounting seat is formed with at least one first mounting position; wherein the support member can be selectively detachably connected to at least one of the first mounting positions.

[0010] By setting at least one first mounting position, the connection between the support member and the mounting base is facilitated, and when there are multiple first mounting positions, the different positions of the telescopic mechanism on the mounting base can be adjusted. Since the blocking assembly is installed on the telescopic member, the position of the blocking block in the blocking assembly on the mounting base can be changed, and the relative position between the blocking block and the battery can be adjusted.

[0011] In some embodiments of the present application, at least one first mounting position includes a plurality of first mounting holes, and the plurality of first mounting holes are arranged in sequence along a second direction, and the second direction is perpendicular to the first direction.

[0012] Multiple first mounting positions are arranged in sequence along the second direction to facilitate adjustment of the installation position of the telescopic mechanism in the second direction. Since the blocking assembly is installed on the telescopic member, the position of the blocking block in the blocking assembly in the second direction can be changed so that the blocking block can adapt to cylindrical lithium batteries of different diameters.

[0013] In some embodiments of the present application, at least one first mounting position includes at least one first waist-shaped hole, the length direction of the first waist-shaped hole is parallel to the second direction, and the second direction is perpendicular to the first direction. The support member is provided with a first connecting hole that cooperates with the first waist-shaped hole, and the support member is connected to the mounting seat through the first connecting member through the first waist-shaped hole and the first connecting hole in sequence.

[0014] Any position of the first waist-shaped hole along the second direction can be used to install the support member, which is conducive to stepless adjustment of the position of the support member in the second direction, so that the blocking block can be accurately aligned with the end cover of the cylindrical lithium battery.

[0015] In some embodiments of the present application, the telescopic mechanism includes a cylinder, the support member is a cylinder body of the cylinder, and the telescopic member is a piston rod of the cylinder.

[0016] The cylinder can adopt an optimal short stroke, so that the blocking block can realize the telescopic function under the drive of the piston rod, making the overall structure of the anti-drag device more compact and saving installation space.

[0017] In some embodiments of the present application, the cylinder is configured as a double-rod cylinder.

[0018] The dual-axis dual-rod cylinder adopts parallel bidirectional motion to ensure the stability of the telescopic part during the extension and retraction process, reduce the probability of shaking of the blocking component due to uneven force, and the dual-rod cylinder has high positioning accuracy, so that the blocking block can be accurately moved between the push head and the end cover.

[0019] In some embodiments of the present application, the telescopic mechanism further includes an air supply pipeline and a throttle valve, the air supply pipeline is connected to the cylinder body, and the throttle valve is provided on the air supply pipeline.

[0020] By controlling the opening of the throttle valve, the speed of the telescopic part during the extension and retraction process can be adjusted, and the rhythm of the extension and retraction of the telescopic part can be effectively controlled, so that the action of the anti-drag device can be consistent with the rhythm of the box cover pre-welding process in the battery production line.

[0021] In some embodiments of the present application, the anti-drag device further includes a magnetic induction switch, and the magnetic induction switch is provided with a cylinder.

[0022] The magnetic induction switch is used to detect whether the cylinder is in place and then determine whether the blocking block is in place.

[0023] In some embodiments of the present application, the blocking assembly further includes: a first fixing seat, connected to the telescopic member, the first fixing seat forming at least one second mounting position; a second fixing seat, the second fixing seat can be selectively detachably connected to at least one second mounting position, and the blocking block is connected to the second fixing seat.

[0024] By setting at least one second mounting position, the connection between the second fixing base and the first fixing base is facilitated, and when there are multiple second mounting positions, the different positions of the second fixing base on the first fixing base can be adjusted. Since the blocking block is installed on the second fixing base, the relative position of the blocking block and the first fixing base can be changed, thereby adjusting the relative position between the blocking block and the battery.

[0025] In some embodiments of the present application, at least one second mounting position includes a plurality of second mounting holes, and the plurality of second mounting holes are sequentially arranged along a third direction, and the third direction is parallel to the moving direction of the push head.

[0026] By providing a plurality of second mounting holes, it is easy to adjust the mounting position of the blocking block in the third direction, so that the blocking block can accurately extend between the push head and the end cover.

[0027] In some embodiments of the present application, at least one second mounting position includes at least one second waist-shaped hole, the length direction of the second waist-shaped hole is parallel to the third direction, the third direction is parallel to the moving direction of the push head, and the second fixed seat is provided with a second connecting hole that cooperates with the second waist-shaped hole. The second fixed seat is connected to the first fixed seat through the second connecting member through the second waist-shaped hole and the second connecting hole in sequence.

[0028] Any position of the second waist-shaped hole along the third direction can form a second mounting position for mounting the second fixing seat, which is conducive to stepless adjustment of the position of the second fixing seat in the third direction, so that the blocking block can be accurately extended between the push head and the end cover.

[0029] In some embodiments of the present application, the blocking block includes a connected main body portion and a blocking portion, the main body portion is connected to the second fixed seat, the blocking portion is located on the side of the second fixed seat away from the telescopic member, the blocking portion is a long strip structure extending along the first direction, and the blocking portion is used to extend between the push head and the end cover in the extended state.

[0030] Providing the blocking portion with a long strip structure is conducive to making the blocking portion move more smoothly along the first direction and reducing the probability of interference with the push head.

[0031] In some embodiments of the present application, the blocking portion is provided with a guide surface, and when the telescopic member is in the extended state, the guide surface is used to tilt relative to the end cover and toward the end cover.

[0032] In the process of extending into between the push head and the end cover, the blocking portion is provided with a guide surface, which is beneficial to reducing the probability of the blocking block hitting the battery.

[0033] In the second aspect, the present application provides a battery production line, which includes: a battery conveyor line for conveying batteries; a pusher head, which is arranged on one side of the battery conveyor line along a conveying direction perpendicular to the battery conveyor line, and the pusher head has a receiving groove for placing the end cover, and the pusher head is used to push the end cover against the battery can body; at least one anti-drag device, and the anti-drag device is arranged on one side of the pusher head along the first direction.

[0034] When the pre-welding of the battery end cover is completed, before the push head retracts, the telescopic part of the telescopic mechanism is transformed from a retracted state to an extended state, so that the blocking block is extended between the push head and the end cover. During the retraction of the push head, the blocking block blocks the end cover from moving with the push head, thereby preventing the end cover from being pulled off by the push head during the continuous retraction of the push head.

[0035] In some embodiments of the present application, the battery production line includes two anti-drag devices, which are respectively arranged on both sides of the battery conveyor line in a direction perpendicular to the conveying direction of the battery conveyor line and are used to respectively clamp the end covers at both ends of the battery.

[0036] The two anti-drag devices respectively clamp the end caps at both ends of the battery, so that the end caps will not be dragged out when the push head is retracted, and the battery will not fall off the battery conveyor line. At the same time, the position of the battery on the battery conveyor line is stabilized, thereby greatly improving the first-time quality rate and quality rate of the cylindrical lithium battery cover pre-welding process.

[0037] In some embodiments of the present application, the push head includes a main body and a plurality of cantilever parts provided on the main body. The main body is cylindrical, and the cantilever parts are arranged in sequence and spaced apart along the circumference of the main body. An end of the cantilever part away from the main body forms a receiving groove.

[0038] The gap between any two cantilever parts is used to avoid the welding head, so that the welding head can pre-spot weld the end cover and the battery can through the gap between the two cantilever parts.

[0039] In some embodiments of the present application, an avoidance gap is provided between at least two adjacent cantilever portions among the plurality of cantilever portions, and the blocking block in the anti-dragging device can extend into between the pusher head and the end cover through the avoidance gap.

[0040] The avoidance gap is used to avoid the blocking block, so that the blocking portion of the blocking block can extend into between the push head and the end cover through the avoidance gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0042] Figure 1 A schematic diagram of the assembly structure of the anti-drag device provided in some embodiments of the present application;

[0043] Figure 2 A schematic diagram of a partial assembly structure of a battery production line provided in some embodiments of the present application;

[0044] Figure 3 A schematic diagram of the assembly structure of a mounting base provided in some embodiments of the present application;

[0045] Figure 4 A schematic diagram of the assembly structure of a mounting base provided in some embodiments of the present application;

[0046] Figure 5 A schematic diagram of the assembly structure of the support member provided in some embodiments of the present application;

[0047] Figure 6 A schematic diagram of the assembly structure of the first fixing seat provided in some embodiments of the present application;

[0048] Figure 7 A schematic diagram of the assembly structure of the second fixing base provided in some embodiments of the present application;

[0049] Figure 8 Schematic diagram of the assembly structure of the first fixing seat provided in some embodiments of the present application.

[0050] The reference numerals are as follows:

[0051] 100. Anti-drag device;

[0052] 10. Mounting seat; 11. First mounting position; 111. First mounting hole; 112. First waist-shaped hole;

[0053] 20. Telescopic mechanism; 21. Telescopic member; 22. Support member; 221. First connecting hole;

[0054] 30. Blocking assembly; 31. Blocking block; 311. Main body; 312. Blocking portion; 3121. Guide surface; 32. First fixing seat; 321. Second mounting position; 3211. Second mounting hole; 3212. Second waist-shaped hole; 33. Second fixing seat; 331. Second connecting hole;

[0055] 200. Battery production line;

[0056] 210, pusher head; 2101, main body; 2102, cantilever; 2103, avoidance gap;

[0057] 300, battery; 301, end cap;

[0058] X is the first direction; Y is the second direction; and Z is the third direction. DETAILED DESCRIPTION

[0059] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0061] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0062] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0063] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0064] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0065] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0066] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0067] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0068] In the pre-spot welding process for the end caps of cylindrical lithium batteries, the end caps need to be placed in the receiving groove of the pusher head first. The pusher head then pushes the end caps to maintain contact with the battery can body. The end caps are then pre-spot welded using the welding head. After the pre-spot welding is completed, the pusher head retracts and disengages from the end caps. However, when the end caps are tilted relative to the pusher head, they can easily become stuck in the receiving groove. During the retraction of the pusher head, the end caps can be dragged along, tearing the welds and causing the end caps to fall off. Alternatively, the entire battery can be dragged off the conveyor line during the retraction of the pusher head.

[0069] Based on the above considerations, the present application proposes an anti-drag device, which includes a mounting base that is stationary relative to the end cover of the battery, a telescopic mechanism installed on the mounting base, and a blocking assembly installed on the telescopic part of the telescopic mechanism. The telescopic part drives the blocking block in the blocking assembly to extend and retract along the first direction. Before the push head retracts, the telescopic part of the telescopic mechanism is transformed from a contracted state to an extended state to make the blocking block extend between the push head and the end cover. During the retraction of the push head, the blocking block blocks the end cover from moving with the push head, thereby preventing the end cover from being dragged off by the push head during the continuous retraction of the push head, and preventing the entire battery from being dragged off from the conveyor line during the retraction of the push head.

[0070] According to the implementation mode of this application, Figure 1 and Figure 2 As shown, an anti-drag device 100 for a battery end cover is provided. The anti-drag device 100 includes a mounting seat 10 , a telescopic mechanism 20 and a blocking assembly 30 .

[0071] Specifically, the telescopic mechanism 20 is mounted on the mounting base 10 and includes a telescopic member 21 that can be extended and retracted along a first direction. The telescopic member 21 has a retracted state and an extended state. A blocking assembly 30 is mounted on the telescopic member 21 and includes a blocking block 31. The blocking block 31 is configured to extend between the pusher head 210 and the end cap 301 when the telescopic member is in the extended state and to disengage from the pusher head 210 and the end cap 301 when the telescopic member is in the retracted state. The first direction forms an angle with the direction of movement of the pusher head 210.

[0072] In this embodiment, the moving direction of the pusher head 210 is parallel to the axial direction of the cylindrical lithium battery 300 , and the first direction is perpendicular to the moving direction of the pusher head 210 .

[0073] The mounting base 10 serves as a carrier for the telescopic mechanism 20. During the pre-welding process of closing the battery 300, the mounting base 10 remains stationary relative to the battery 300, allowing the telescopic member 21 in the telescopic mechanism 20 to drive the blocking block 31 to move relative to the battery 300, allowing the blocking block 31 to extend between the pusher head 210 and the end cap 301 before the pusher head 210 retracts. In this embodiment, the specific shape of the mounting base 10 is not limited.

[0074] The telescopic mechanism 20 is a movable mechanism having at least one device capable of reciprocating movement. The telescopic unit of the telescopic mechanism 20 includes but is not limited to a linear motor module, a gear rack mechanism, a four-link telescopic mechanism 20, a cylinder or a hydraulic cylinder telescopic mechanism 20. For example, in some embodiments, the telescopic mechanism 20 is a linear motor, which includes a linear guide and a mover seat slidably connected to the linear guide. The linear guide is provided with a plurality of stators, and the mover seat is provided with a mover that cooperates with the stator. When the linear guide is energized, the stator and the mover interact with each other, thereby driving the mover seat to perform linear motion relative to the linear guide. Wherein, if the mover seat is connected to the mounting seat 10, the linear guide acts as a telescopic member 21, and the blocking assembly 30 is connected to the guide rail in between. If the linear guide is connected to the mounting seat 10, the mover seat acts as a telescopic member 21, and the blocking assembly 30 is installed on the mover seat.

[0075] According to the anti-drag device 100 provided in the present application, after the pre-welding of the battery end cover is completed, before the push head 210 retracts, the telescopic part 21 of the telescopic mechanism 20 is transformed from a contracted state to an extended state, so that the blocking block 31 is extended between the push head 210 and the end cover 301. During the retraction of the push head 210, the blocking block 31 blocks the end cover 301 from moving with the push head 210, thereby preventing the end cover 301 from being dragged down by the push head 210 during the continuous retraction of the push head 210.

[0076] In some embodiments of this application, please combine Figure 1 、 Figure 3 and Figure 4 As shown, the telescopic mechanism 20 further includes a support member 22, and the telescopic member 21 is slidably disposed on the support member 22. The mounting base 10 is provided with at least one first mounting position 11, and the support member 22 can be selectively detachably connected to one of the first mounting positions 11.

[0077] The support member 22 serves as a carrier of the telescopic member 21. The support member 22 is provided with a sliding structure extending along a first direction. The sliding structure can be, for example, a slide rail, a slide groove, a slide hole, a cylindrical sliding cavity or other structural forms. The telescopic member 21 can be slidably arranged on the sliding structure so that the telescopic member 21 can move relative to the support member 22 in the first direction relative to the support member 22.

[0078] The first mounting position 11 is a structure for connecting to the support member 22. The first mounting position 11 can be a structure in the form of a slot, a through hole, a threaded hole, etc., so as to facilitate the detachable connection of the support member to the mounting base.

[0079] In some embodiments of the present application, at least one first mounting position 11 includes a plurality of first mounting holes 111 , and the plurality of first mounting holes 111 are sequentially arranged along a second direction, and the second direction is perpendicular to the first direction.

[0080] like Figure 3 As shown, the first mounting holes 111 are a plurality of through holes provided on the mounting base 10 . The plurality of first mounting holes 111 are sequentially arranged at intervals along the second direction, and each first mounting hole 111 is used to mount the support member 22 .

[0081] By forming a plurality of first mounting holes 111 on the mounting base 10 for selective installation of the support member 22, the installation position of the telescopic mechanism 20 in the second direction can be adjusted. Since the blocking assembly 30 is installed on the telescopic member 21, the position of the blocking block 31 in the blocking assembly 30 in the second direction can be changed so that the blocking block 31 can adapt to cylindrical lithium batteries 300 of different diameters.

[0082] In some embodiments of the present application, Figure 4 and Figure 5 As shown, the first mounting position 11 includes at least one first waist-shaped hole 112, the length direction of the first waist-shaped hole 112 is parallel to the second direction, and the support member 22 is provided with a first connecting hole 221 that cooperates with the first waist-shaped hole 112. The support member 22 is connected to the mounting seat 10 through the first connecting member through the first waist-shaped hole 112 and the first connecting hole 221 in sequence.

[0083] The first connecting hole 221 is a countersunk hole, the first connecting member is a bolt, and the inner wall of the first connecting hole 221 is provided with an internal thread that matches the external thread of the first connecting member. The first connecting member is inserted into the first waist-shaped hole 112 and extends into the first connecting hole 221.

[0084] Any position of the first waist-shaped hole 112 along the second direction can be used to install the support member 22, which is conducive to stepless adjustment of the position of the support member 22 in the second direction, so that the blocking block 31 can be accurately aligned with the end cover 301 of the cylindrical lithium battery 300.

[0085] In some embodiments of the present application, the telescopic mechanism 20 includes a cylinder, the support member 22 is a cylinder body of the cylinder, and the telescopic member 21 is a piston rod of the cylinder.

[0086] The cylinder can adopt an optimal short stroke, so that the blocking block 31 can realize the telescopic function under the drive of the piston rod, making the overall structure of the anti-drag device 100 more compact and saving installation space.

[0087] In some embodiments of the present application, the cylinder is configured as a double-rod cylinder.

[0088] The dual-axis dual-rod cylinder adopts parallel bidirectional motion, which can ensure the stability of the telescopic part 21 during the telescopic process, reduce the probability of shaking of the blocking assembly 30 due to uneven force, and the dual-rod cylinder has high positioning accuracy, so that the blocking block 31 can be accurately moved between the push head 210 and the end cover 301.

[0089] In some embodiments of the present application, the telescopic mechanism 20 further includes an air supply pipeline (not shown in the figure) and a throttle valve (not shown in the figure), the air supply pipeline is connected to the cylinder body, and the throttle valve is provided on the air supply pipeline.

[0090] A throttle valve is a valve that controls the flow of fluid by changing the throttle section or throttle length. It changes the air flow velocity in the gas pipeline, thereby changing the extension and contraction speed of the piston rod.

[0091] By controlling the opening of the throttle valve, the speed of the telescopic part 21 during the extension and retraction process can be adjusted, and the rhythm of the extension and retraction of the telescopic part 21 can be effectively controlled, so that the action of the anti-drag device 100 can be consistent with the rhythm of the box cover pre-welding process in the battery production line 200.

[0092] In some embodiments of the present application, the anti-drag device 100 further includes a magnetic induction switch (not shown in the figure), and the magnetic induction switch is provided with a cylinder.

[0093] A magnetic induction switch is a non-contact magnetic sensor consisting of a housing, a magnetic sensing element, an electronic circuit, and wiring. The magnetic sensing element detects the position of a magnetic ring within a cylinder that moves with the piston, thereby detecting the position of the piston rod.

[0094] In this embodiment, the anti-drag device 100 includes two magnetic induction switches, which are respectively provided at the two ends of the cylinder body of the cylinder, and are used to respectively detect whether the contraction state and the extension state of the piston rod are in place.

[0095] The magnetic induction switch is used to detect whether the cylinder is in place, and then determine whether the blocking block 31 is in place.

[0096] In some embodiments of this application, please combine Figure 1 、 Figure 6 Figure 7 and Figure 8As shown, the blocking assembly 30 further includes a first fixing seat 32 and a second fixing seat 33. The first fixing seat 32 is connected to the telescopic member 21, and the first fixing seat 32 is formed with at least one second mounting position 321. The second fixing seat 33 can be selectively and detachably connected to the at least one second mounting position 321, and the blocking block 31 is connected to the second fixing seat 33.

[0097] The second mounting position 321 is a structure for connecting to the second fixing seat 33 . The second mounting position 321 can be a structure in the form of a slot, a through hole, a threaded hole, etc., so as to facilitate the detachable connection of the second fixing seat 33 to the first fixing seat 32 .

[0098] By setting at least one second mounting position 321, the connection between the second fixing seat 33 and the first fixing seat 32 is facilitated. When there are multiple second mounting positions 321, the different positions of the second fixing seat 33 on the first fixing seat 32 can be adjusted. Since the blocking block 31 is installed on the second fixing seat 33, the relative position of the blocking block and the first fixing seat can be changed, thereby adjusting the relative position between the blocking block and the battery.

[0099] In some embodiments of the present application, at least one second mounting position 321 includes a plurality of second mounting holes 3211 , and the plurality of second mounting holes 3211 are sequentially arranged along a third direction, which is parallel to the moving direction of the pusher head 210 .

[0100] The first fixing seat 32 and the second fixing seat 33 are both rectangular plate-shaped structures.

[0101] like Figure 8 As shown, the second mounting holes 3211 are a plurality of through holes provided on the first fixing seat 32 . The plurality of second mounting holes 3211 are sequentially arranged at intervals along the third direction, and each second mounting hole 3211 is used to mount the second fixing seat 33 .

[0102] By providing a plurality of second mounting holes 3211 for selectively mounting the second fixing seat 33 , the mounting position of the blocking block 31 in the third direction can be adjusted so that the blocking block 31 can accurately extend between the push head 210 and the end cover 301 .

[0103] In some embodiments of the present application, Figure 6 and Figure 7 As shown, the second mounting position 321 includes at least one second waist-shaped hole 3212, the length direction of the second waist-shaped hole 3212 is parallel to the third direction, and the second fixing seat 33 is provided with a second connecting hole 331 that cooperates with the second waist-shaped hole 3212. The second fixing seat 33 is connected to the first fixing seat 32 through the second waist-shaped hole 3212 and the second connecting hole 331 in sequence through the second connecting member.

[0104] The second connecting hole 331 is a countersunk hole, the second connecting member is a bolt, and the inner wall of the second connecting hole 331 is provided with an internal thread that cooperates with the external thread of the second connecting member. The second connecting member is passed through the second waist-shaped hole 3212, and the second connecting member extends into the second connecting hole 331, so that the first fixing seat 32 is connected to the second fixing seat 33.

[0105] The second waist-shaped hole 3212 can form a second mounting hole 3211 for mounting the second fixing seat 33 at any position along the third direction, which is conducive to stepless adjustment of the position of the second fixing seat 33 in the third direction, so that the blocking block 31 can be accurately extended between the push head 210 and the end cover 301.

[0106] In some embodiments of the present application, the blocking block 31 includes a connected main body portion 311 and a blocking portion 312, the main body portion 311 is connected to the second fixed seat 33, the blocking portion 312 is located on the side of the second fixed seat 33 away from the telescopic member 21, and the blocking portion 312 is a long strip structure extending along the first direction. The blocking portion 312 is used to extend between the push head 210 and the end cover 301 in the extended state.

[0107] The main body 311 is plate-shaped, and the blocking portion 312 is provided on the side of the second fixing seat 33 facing away from the telescopic member 21 and extending toward the push head 210 and the end cover 301. The blocking portion 312 is provided as a long strip structure, which facilitates smoother movement of the blocking portion 312 in the first direction and reduces the probability of interference with the push head 210.

[0108] In some embodiments of the present application, the blocking portion 312 is provided with a guide surface 3121 , and in the extended state, the guide surface 3121 is used to tilt relative to the end cover 301 and toward the end cover 301 .

[0109] The guide surface 3121 is planar. By setting the guide surface 3121, it is helpful to reduce the size of the blocking portion 312 along the third direction toward one end of the end cover 301. In the process of the blocking portion 312 extending into the space between the push head 210 and the end cover 301, the blocking portion 312 is provided with the guide surface 3121, which is helpful to reduce the probability of the blocking block 31 hitting the battery 300.

[0110] Second, as Figure 2 As shown, the present application provides a battery production line 200, which includes a battery conveyor line, a pusher head 210, and at least one anti-dragging device 100. Specifically, the battery conveyor line is used to convey batteries 300. The pusher head 210 is arranged on one side of the battery conveyor line in a direction perpendicular to the conveying direction of the battery conveyor line. The pusher head 210 has a receiving groove for placing the end cap 301. The pusher head 210 is used to push the end cap 301 against the can body of the battery 300. The anti-dragging device 100 is arranged on one side of the pusher head 210 along a first direction.

[0111] The battery conveyor line is a synchronous belt conveyor mechanism for conveying batteries 300. In this embodiment, the batteries 300 are cylindrical lithium batteries. The axial direction of the cylindrical lithium batteries is perpendicular to the movement direction of the battery conveyor line. The movement direction of the pusher head 210 is parallel to the axial direction of the cylindrical lithium batteries. The first direction is perpendicular to the movement direction of the pusher head 210, the second direction is perpendicular to the first direction, and the third direction is parallel to the movement direction of the pusher head 210.

[0112] When the pre-welding of the end cover 301 of the battery 300 is completed, before the push head 210 retracts, the telescopic part 21 of the telescopic mechanism 20 is changed from a contracted state to an extended state, so that the blocking block 31 is extended between the push head 210 and the end cover 301. During the retraction of the push head 210, the blocking block 31 blocks the end cover 301 from moving with the push head 210, thereby preventing the end cover 301 from being pulled off by the push head 210 during the continuous retraction of the push head 210.

[0113] In some embodiments of the present application, Figure 2 As shown, the push head 210 includes a main body 2101 and a plurality of cantilever parts 2102 arranged on the main body 2101. The main body 2101 is cylindrical, and the cantilever parts 2102 are arranged in sequence along the circumference of the main body 2101. The end of the cantilever part 2102 away from the main body 2101 forms a receiving groove.

[0114] The cantilever portion 2102 is columnar in shape, and the length direction of the cantilever portion 2102 is parallel to the moving direction of the push head 210. A groove is provided at the end of the cantilever portion 2102 away from the main body portion 2101. The groove is located on the side of the cantilever portion 2102 facing the axis of the main body portion 2101. The grooves on the multiple cantilever portions 2102 jointly define a receiving groove, so that the end cover 301 is clamped between at least two oppositely arranged cantilever portions 2102.

[0115] The gap between any two cantilever parts 2102 is used to avoid the welding head, so that the welding head can pre-spot weld the end cover 301 and the can body of the battery 300 through the gap between the two cantilever parts 2102.

[0116] In some embodiments of the present application, a clearance gap 2103 is defined between at least two adjacent cantilever portions 2102 among the plurality of cantilever portions 2102. The blocking block 31 in the anti-dragging device 100 can pass through the clearance gap 2103 and extend between the pusher head 210 and the end cover 301. The clearance gap 2103 is used to allow the blocking block 31 to pass through, so that the blocking portion 312 of the blocking block 31 can extend between the pusher head 210 and the end cover 301.

[0117] In this embodiment, the battery production line 200 includes two anti-drag devices 100, which are respectively arranged on both sides of the battery conveyor line in a direction perpendicular to the conveying direction of the battery conveyor line and are used to respectively clamp the end covers 301 at both ends of the battery 300.

[0118] The two anti-drag devices respectively clamp the end caps at both ends of the battery, so that the end caps will not be dragged out when the push head is retracted, and the battery will not fall off the battery conveyor line. At the same time, the position of the battery on the battery conveyor line is stabilized, thereby greatly improving the first-time quality rate and quality rate of the cylindrical lithium battery cover pre-welding process.

[0119] The battery production line 200 provided in the second embodiment of the present application may also include drying equipment, winding equipment, etc. Since it includes the anti-drag device 100 of the first embodiment, it also has the technical effects of any of the above embodiments, which will not be repeated here.

[0120] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0121] According to the implementation method of this application, please combine Figure 1 and Figure 2 As shown, an anti-drag device 100 for a battery end cover is proposed. The anti-drag device 100 includes a mounting seat 10 , a telescopic mechanism 20 and a blocking assembly 30 .

[0122] The telescopic mechanism 20 includes a telescopic member 21 that can be extended and retracted along a first direction. The telescopic member 21 has a retracted state and an extended state. A blocking assembly 30 is mounted on the telescopic member 21. The blocking assembly 30 includes a blocking block 31. The blocking block 31 is configured to extend between the pusher head 210 and the end cap 301 in the extended state and to disengage from the space between the pusher head 210 and the end cap 301 in the retracted state. The first direction is perpendicular to the direction of movement of the pusher head 210.

[0123] In detail, the mounting base 10 is in a plate-like shape and is provided with a first waist-shaped hole 112 . The length direction of the first waist-shaped hole 112 is parallel to the second direction.

[0124] Telescopic mechanism 20 is a double-rod pneumatic cylinder. Its cylinder body is provided with a first connecting hole 221 that mates with first waist-shaped hole 112. Bolts pass through first waist-shaped hole 112 and first connecting hole 221, respectively, to connect the cylinder body to mounting base 10. The piston rod of the double-rod cylinder is the telescopic member 21 described above. Using a double-rod cylinder prevents the stopper 31 from rotating.

[0125] The blocking assembly 30 includes a first fixing seat 32, a second fixing seat 33 and a blocking block 31. The first fixing seat 32 and the second fixing seat 33 are both rectangular plate structures. The first fixing seat 32 is connected to one end of the piston rod extending out of the cylinder body. The first fixing seat 32 is provided with a second waist-shaped hole 3212. The length direction of the second waist-shaped hole 3212 is parallel to the third direction. The second fixing seat 33 is provided with a second connecting hole 331 that cooperates with the second waist-shaped hole 3212. The inner wall of the second connecting hole 331 is provided with an internal thread that cooperates with the external thread of the bolt. The bolt is passed through the second waist-shaped hole 3212 and extends into the second connecting hole 331, so that the first fixing seat 32 is connected to the second fixing seat 33.

[0126] The blocking block 31 is fixed to the second fixing base 33 and includes a main body 311 and a blocking portion 312. The main body 311 is connected to the second fixing base 33, and the blocking portion 312 is located on the side of the second fixing base 33 facing away from the telescopic member 21. The blocking portion 312 is an elongated strip extending along a first direction. When extended, the blocking portion 312 is configured to extend between the push head 210 and the end cap 301. The blocking portion 312 is provided with a planar guide surface 3121. When extended, the guide surface 3121 is configured to tilt relative to the end cap 301 and toward the end cap 301. By providing the guide surface 3121, it is helpful to reduce the size of the blocking portion 312 along the third direction toward one end of the end cover 301. When the blocking portion 312 extends between the push head 210 and the end cover 301, the blocking portion 312 is provided with the guide surface 3121, which can effectively cut into the outer side of the end cover 301 of the battery 300, thereby reducing the probability of the blocking block 31 scratching or colliding with the battery 300.

[0127] The anti-drag device 100 also includes a gas pipeline, a throttle valve, a magnetic induction switch, and a two-position, five-way, single-control solenoid valve. The gas pipeline is connected to the cylinder body, and the throttle valve and the two-position, five-way, single-control solenoid valve are installed in series on the gas pipeline. Controlling the opening of the throttle valve adjusts the speed of the telescopic member 21 during its extension and retraction, effectively controlling the tempo of its extension and retraction, ensuring that the operation of the anti-drag device 100 is consistent with the tempo of the pre-welding process of the battery cover on the production line 200. The two-position, five-way, single-control solenoid valve is used to change the gas flow direction in the gas pipeline, transitioning the telescopic member 21 between a retracted and extended state.

[0128] The anti-drag device 100 includes two magnetic induction switches, which are non-contact magnetic sensors consisting of a housing, a magnetic sensing component, electronic circuitry, and wiring. The magnetic sensing component detects the position of a magnetic ring within the cylinder that moves with the piston, thereby detecting the position of the associated piston rod. The two magnetic induction switches are located at either end of the cylinder body to detect whether the piston rod is in its retracted and extended states, respectively.

[0129] In this embodiment, the double-rod cylinder is an optimal short-stroke cylinder to minimize the installation space. The cylinder drives the blocking block 31 to move with full stroke, reducing the stroke adjustment mechanism, making the anti-drag device 100 simple and compact.

[0130] In this embodiment, in the pre-welding process of closing the end caps of the cylindrical lithium battery, after the pre-welding is completed, the end caps at both ends of the battery are clamped respectively by two anti-drag devices, and then the push head is retracted. At this time, due to the obstruction of the anti-drag device, the end caps will not be dragged out, and the battery will not be dropped from the battery conveyor line. At the same time, the position of the battery cell on the battery conveyor line is stabilized, thereby greatly improving the first-time quality rate and quality rate of the pre-welding process of closing the end caps of the cylindrical lithium battery.

[0131] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A battery end cover anti-drag device, characterized in that: The anti-drag device comprises: Mounting seat; A telescopic mechanism, mounted on the mounting seat, the telescopic mechanism comprising a telescopic member that can be telescoped along a first direction, the telescopic member having a contracted state and an extended state; A blocking assembly is mounted on the telescopic member, the blocking assembly includes a blocking block, the blocking block is used to extend between the pusher head and the end cover when the telescopic member is in the extended state, and to be disengaged from between the pusher head and the end cover when the telescopic member is in the retracted state; Wherein, the first direction forms an angle with the moving direction of the pusher head.

2. The anti-drag device for the battery end cover according to claim 1, characterized in that: The telescopic mechanism further comprises a support member, and the telescopic member is slidably disposed on the support member; The mounting seat is formed with at least one first mounting position; Wherein, the support member can be selectively detachably connected to at least one of the first mounting positions.

3. The anti-drag device for the battery end cover according to claim 2, characterized in that: The at least one first mounting position includes a plurality of first mounting holes, and the plurality of first mounting holes are arranged in sequence along a second direction, and the second direction is perpendicular to the first direction.

4. The anti-drag device for the battery end cover according to claim 2, characterized in that: The at least one first mounting position includes at least one first waist-shaped hole, the length direction of the first waist-shaped hole is parallel to the second direction, the second direction is perpendicular to the first direction, the support member is provided with a first connecting hole matching the first waist-shaped hole, and the support member is connected to the mounting seat through the first connecting member through the first waist-shaped hole and the first connecting hole in sequence.

5. The anti-drag device for the battery end cover according to claim 2, characterized in that: The telescopic mechanism comprises a cylinder, the supporting member is a cylinder body of the cylinder, and the telescopic member is a piston rod of the cylinder.

6. The anti-drag device for the battery end cover according to claim 5, characterized in that: The cylinder is configured as a double-rod cylinder.

7. The anti-drag device for the battery end cover according to claim 5, characterized in that: The telescopic mechanism further comprises an air supply pipeline and a throttle valve, wherein the air supply pipeline is communicated with the cylinder body, and the throttle valve is arranged on the air supply pipeline.

8. The anti-drag device for the battery end cover according to claim 5, characterized in that: The anti-drag device also includes a magnetic induction switch, and the magnetic induction switch is arranged on the cylinder.

9. The anti-drag device for a battery end cover according to any one of claims 2 to 8, characterized in that: The blocking assembly further comprises: A first fixing seat connected to the telescopic member, wherein the first fixing seat is formed with at least one second installation position; A second fixing seat, wherein the second fixing seat can be selectively detachably connected to at least one of the second mounting positions, and the blocking block is connected to the second fixing seat.

10. The anti-drag device for the battery end cover according to claim 9, characterized in that: The at least one second mounting position includes a plurality of second mounting holes, and the plurality of second mounting holes are arranged in sequence along a third direction, and the third direction is parallel to the moving direction of the pusher head.

11. The anti-drag device for the battery end cover according to claim 9, characterized in that: The at least one second mounting position includes at least one second waist-shaped hole, the length direction of the second waist-shaped hole is parallel to the third direction, and the third direction is parallel to the moving direction of the push head. The second fixing seat is provided with a second connecting hole that cooperates with the second waist-shaped hole, and the second fixing seat is connected to the first fixing seat through a second connecting member that passes through the second waist-shaped hole and the second connecting hole in sequence.

12. The anti-drag device for the battery end cover according to claim 9, characterized in that: The blocking block includes a main body portion and a blocking portion which are connected, wherein the main body portion is connected to the second fixing seat, and the blocking portion is located on a side of the second fixing seat away from the telescopic member and is used to extend between the push head and the end cover when the telescopic member is in the extended state.

13. The anti-drag device for the battery end cover according to claim 12, characterized in that: The blocking portion is provided with a guide surface, and when the telescopic member is in the extended state, the guide surface is inclined relative to the end cover and faces the end cover.

14. A battery production line, characterized in that: The battery production line includes: Battery conveyor line, used to convey batteries; A pusher head is arranged at one side of the battery conveyor line along a conveying direction perpendicular to the battery conveyor line, the pusher head has a receiving groove for placing the end cover, and the pusher head is used to push the end cover against the can body of the battery; At least one anti-drag device according to any one of claims 1 to 13, wherein the anti-drag device is arranged on one side of the push head along the first direction.

15. The battery production line according to claim 14, characterized in that: The battery production line comprises two anti-drag devices, which are respectively arranged on both sides of the battery conveyor line in a direction perpendicular to the conveying direction of the battery conveyor line and are used to clamp the end covers at both ends of the battery respectively.

16. The battery production line according to claim 14, characterized in that: The pusher head comprises a main body and a plurality of cantilever parts arranged on the main body, wherein the plurality of cantilever parts are arranged at intervals along the outer edge of the main body, and the accommodating groove is formed at one end of the cantilever part away from the main body.

17. The battery production line according to claim 16, characterized in that: There is an avoidance gap between at least two adjacent cantilever parts among the plurality of cantilever parts, and the blocking block in the anti-drag device can extend into between the pusher head and the end cover through the avoidance gap.

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