Battery cell center tube insertion device and insertion method and battery cell transport mechanism

Abstract

The application provides an electric core center tube inserting device and inserting method and an electric core conveying mechanism. The electric core center tube inserting device comprises a center tube material preparation assembly, a ejector pin assembly, a positioning assembly, a guide pin assembly and a driving part. The center tube material preparation assembly comprises a center tube box and a center tube guide box. The center tube box is used for accommodating a plurality of center tubes. The center tubes in the center tube box can roll into the center tube guide box. The center tube guide box is provided with a first through hole which can only accommodate a single center tube. The ejector pin assembly comprises an ejector pin which is used for abutting against the first end of the center tube and pushing the center tube out of the first through hole. The positioning assembly is used for fixing the electric core. The guide pin assembly comprises a guide pin which can pass through the electric core and abut against the second end of the center tube. The center tube can be fixed between the guide pin and the ejector pin. The driving part is used for driving the ejector pin and the guide pin to move so that the center tube is inserted into the electric core. The application improves the success rate and efficiency of inserting the center tube.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production equipment, and in particular to a battery core central tube insertion device and insertion method and a battery core conveying mechanism. Background Art

[0002] Currently, cylindrical batteries are produced using winding machines. After winding is completed, the winding needle is withdrawn, leaving a cylindrical hole in the center of the battery cell with the same diameter as the needle. However, cylindrical batteries, especially large cylindrical batteries, are prone to swelling after a certain number of cycles. Due to the hollow hole in the center of the cylindrical battery, when the battery is subjected to stress, the center hole can easily sag, preventing the electrode from fitting properly at the center hole, leading to safety issues such as lithium deposition. Therefore, it is necessary to insert a center tube into the center hole of the battery cell.

[0003] In the prior art, a center tube is usually prepared on one side, and after the battery cell is clamped, it is directly inserted into the center hole of the battery cell from one side. However, this method of inserting the center tube has low positioning accuracy, which affects the success rate and efficiency of inserting the center tube. Summary of the Invention

[0004] The present invention aims to solve the problem that the positioning accuracy of the existing battery core central tube insertion device is low, which affects the success rate and efficiency of central tube insertion.

[0005] To solve the above problems, the present invention provides a first aspect of a battery core central tube insertion device, comprising:

[0006] A central tube material preparation assembly, comprising a central tube material box and a central tube guide box. The central tube material box is used to accommodate multiple central tubes. The central tubes in the central tube material box can roll into the central tube guide box. The central tube guide box is provided with a first through hole capable of accommodating only a single central tube.

[0007] an ejector pin assembly, the ejector pin assembly comprising an ejector pin, the ejector pin being disposed on a side of the central tube guide box facing away from the first through hole, the ejector pin being configured to abut against the first end of the central tube and push the central tube out of the first through hole;

[0008] a positioning assembly connected to the central tube preparation assembly and located on a side of the central tube guide box where the first through hole is formed, the positioning assembly being used to fix the battery cell;

[0009] A guide needle assembly, the guide needle assembly comprising a guide needle, the guide needle being capable of passing through the central hole of the battery cell and abutting against the second end of the central tube, the central tube being capable of being fixed between the guide needle and the ejector pin;

[0010] A driving member is used to drive the ejector pin and the guide pin to move, and to insert the central tube fixed by the ejector pin and the guide pin into the central hole of the battery core.

[0011] Furthermore, the center tube guide box has a first side wall and a second side wall arranged opposite to each other along a first direction, the first side wall is provided with the first through hole, the second side wall is provided with a second through hole, the first through hole and the second through hole are coaxially arranged, and the ejector pin extends along the first direction and passes through the second through hole; the center tube guide box has a second guide slope and a center tube accommodating groove, the second guide slope and the center tube accommodating groove are arranged between the first side wall and the second side wall, and the center tube rolls from the second guide slope to the center tube accommodating groove under the action of its own gravity, and the center tube accommodating groove is connected to the first through hole and the second through hole.

[0012] Furthermore, the ejector assembly also includes an ejector mounting seat and a first slide rail, the ejector is mounted on the ejector mounting seat, the ejector mounting seat and the first slide rail are slidably connected, the first slide rail extends along a first direction, the driving member includes a first driving member, the first driving member is connected to the ejector mounting seat through a first connecting member, the first driving member drives the ejector mounting seat to move on the first slide rail, so that the ejector moves along the first direction.

[0013] Furthermore, the ejector pin includes a first ejector pin portion and a second ejector pin portion connected to each other, the first ejector pin portion and the second ejector pin portion are arranged along a first direction, the diameter of the first ejector pin portion is smaller than the diameter of the second ejector pin portion, and a first positioning portion is formed between the first ejector pin portion and the second ejector pin portion, and the first positioning portion is used to abut against the first end of the center tube.

[0014] Furthermore, a guide hole is formed in the middle of the first ejector part, and the guide hole extends to the second ejector part, and the guide hole is used to accommodate the guide needle.

[0015] Furthermore, the guide needle assembly also includes a guide needle mounting seat and a second slide rail, the guide needle is mounted on the guide needle mounting seat, the guide needle mounting seat and the second slide rail are slidably connected, the second slide rail extends along the first direction, the driving member includes a second driving member, the second driving member is connected to the guide needle mounting seat through a second connecting member, the second driving member drives the guide needle mounting seat to move on the second slide rail, so that the guide needle moves along the first direction.

[0016] Further, the guide needle comprises a first guide needle part, a second guide needle part and a third guide needle part connected with each other, the first guide needle part, the second guide needle part and the third guide needle part are arranged along a first direction, a diameter of the first guide needle part is smaller than a diameter of the second guide needle part, the diameter of the second guide needle part is smaller than a diameter of the third guide needle part, at least a part of the first guide needle part can penetrate into the guide hole, a second positioning part is formed between the second guide needle part and the third guide needle part, the second positioning part is used to abut against a second end of the center tube.

[0017] Further, the positioning assembly comprises a positioning clamp jaw, a clamp jaw lifting driving member and a clamp jaw mounting seat, the clamp jaw mounting seat is connected with the center tube magazine, the positioning clamp jaw and the clamp jaw lifting driving member are arranged on the clamp jaw mounting seat, the clamp jaw lifting driving member is used to drive the positioning clamp jaw to move along a second direction, the positioning clamp jaw is used to clamp and position the battery cell.

[0018] The second aspect of the present application provides a battery cell center tube insertion method, the battery cell center tube insertion device as described in the first aspect is used to insert the center tube into the battery cell, the battery cell center tube insertion method comprises the following steps:

[0019] While the center tube to be inserted is rolled from the center tube magazine to the center tube guide box, the positioning assembly clamps the battery cell and adjusts the battery cell to be coaxial with the center tube in the center tube guide box;

[0020] The guide needle moves towards the battery cell, the guide needle abuts against the second end of the center tube after penetrating through the center hole of the battery cell, at the same time, the ejector pin moves towards the battery cell, the ejector pin abuts against the first end of the center tube, until the center tube is fixed between the guide needle and the ejector pin;

[0021] The guide needle and the ejector pin move at the same speed, the center tube moves towards the battery cell, until the center tube is completely inserted into the center hole of the battery cell, the insertion of the center tube is completed, the guide needle and the ejector pin are reset, ready for the next insertion of the center tube.

[0022] The third aspect of the present application provides a battery cell conveying mechanism, comprising a conveying mechanism and the battery cell center tube insertion device as described in the first aspect, the battery cell center tube insertion device is arranged on the conveying mechanism, the conveying mechanism is used to convey the battery cell, the battery cell center tube insertion device is used to insert the center tube into the center hole of the battery cell.

[0023] The battery cell center tube insertion device, insertion method and battery cell conveying mechanism of the present invention are provided with an ejector pin and a guide pin, wherein the ejector pin can move in a first direction to abut against the first end of the center tube, and the guide pin can pass through the center hole of the battery cell and abut against the second end of the center tube, so that the center tube is fixed between the ejector pin and the guide pin. The ejector pin and the guide pin fix the center tube and drive the center tube to be inserted into the center hole of the battery cell, which can ensure that the center tube always remains on the same axis as the center hole during the process of inserting the center hole, so that the center tube can be inserted into the center hole more stably, thereby improving the success rate and stability of the center tube insertion; in addition, the battery cell center tube insertion device is suitable for both short center tubes and long center tubes, has a wider range of applications, and improves the compatibility of the battery cell center tube insertion device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the battery core central tube insertion device provided in an embodiment of the present invention;

[0025] Figure 2 This is a schematic top view of the central tube preparation assembly and ejector pin assembly provided in an embodiment of the present invention;

[0026] Figure 3 This is a schematic top view of the structure of the guide needle assembly provided in an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of the three-dimensional structure of a positioning assembly provided in an embodiment of the present invention;

[0028] Figure 5 A schematic diagram of a structure of a central tube fixed with an ejector pin and a guide pin provided in an embodiment of the present invention;

[0029] Figure 6 This is another schematic diagram of the structure of the ejector pin and the guide pin fixing the central tube provided in an embodiment of the present invention;

[0030] Figure 7 A schematic diagram of the structure of the ejector pin and the guide pin provided in an embodiment of the present invention;

[0031] Figure 8 It is a schematic diagram of the three-dimensional structure of the battery cell conveying mechanism provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is described clearly and in detail below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In addition, in the description of the present invention, the meaning of "at least one" is one or more, unless otherwise clearly and specifically defined.

[0033] Throughout this specification, the term "as an alternative embodiment" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one alternative embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same implementation or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0034] Combine Figures 1 to 4 As shown, the first aspect of this embodiment provides a battery core central tube insertion device, including: a central tube preparation assembly 10, an ejector assembly 20, a guide needle assembly 30 and a positioning assembly 40, wherein:

[0035] The central tube material preparation assembly 10 includes a central tube material box 11 and a central tube guide box 12. The central tube material box 11 is used to accommodate multiple central tubes 1. The central tube 1 in the central tube material box 11 can roll down to the central tube guide box 12, and the central tube guide box 12 is provided with a first through hole (not shown in the figure) that can only accommodate a single central tube 1. The ejector assembly 20 includes an ejector 21. The ejector 21 is arranged on the side of the central tube guide box 12 away from the first through hole. The ejector 21 is coaxial with the first through hole. The ejector 21 is used to abut against the first end of the central tube 1 and insert the central tube 1 into the central tube guide box 12. The core tube 1 is pushed out of the first through hole; the positioning component 40 is connected to the center tube preparation component 10 and is located on the side where the first through hole is opened in the center tube guide box 12, that is, the positioning component 40 is located between the center tube preparation component 10 and the guide needle component 30, and the positioning component 40 is used to fix the battery core 2; the guide needle component 30 includes a guide needle 31, which can pass through the center hole of the battery core 2 and abut against the second end of the center tube 1. The center tube 1 can be fixed between the guide needle 31 and the ejector pin 21, and the first end and the second end are the center tube 1 in the horizontal direction (that is, the first direction, that is, Figure 1 The guide needle 31 and the ejector pin 21 are arranged at two ends opposite to each other (in the x-axis direction in the middle); the guide needle 31 and the ejector pin 21 can move along the first direction. When the guide needle 31 and the ejector pin 21 move along the horizontal direction, the guide needle 31 and the ejector pin 21 can drive the central tube 1 to move along the horizontal direction until the central tube 1 fixed by the guide needle 31 and the ejector pin 21 is inserted into the central hole of the battery cell 2.

[0036] The existing technology usually adopts the method of inserting the central tube from one side, but the method of inserting the central tube from one side is only suitable for battery cells with smaller capacity, that is, the battery cell center hole diameter - central tube diameter ≥ 1mm-1.5mm, and the battery cell height (that is, the length of the central tube in the horizontal direction) ≤ 140mm. As the capacity of the battery cell increases, most battery cells need to meet the following conditions: the battery cell center hole diameter - central tube diameter ≤ 0.5-1mm, and the battery cell height ≤ 250mm. As the length of the central tube increases, the method of inserting the central tube from one side may cause one end of the central tube to droop under the action of its own gravity, resulting in failure of the central tube insertion. The battery cell center tube insertion device provided in this embodiment is provided with an ejector pin and a guide pin. The ejector pin can move in the horizontal direction to abut against the first end of the center tube, and the guide pin can pass through the center hole of the battery cell and abut against the second end of the center tube, so that the center tube is fixed between the ejector pin and the guide pin. The ejector pin and the guide pin fix the center tube and drive the center tube to be inserted into the center hole of the battery cell, which can ensure that the center tube always remains on the same axis as the center hole during the process of inserting the center hole, so that the center tube can be inserted into the center hole more stably, thereby improving the success rate and stability of the center tube insertion; in addition, the battery cell center tube insertion device is suitable for both shorter center tubes and longer center tubes, has a wider range of applications, and improves the compatibility of the battery cell center tube insertion device.

[0037] Based on the above embodiment, as an optional embodiment, the central tube material box 11 includes a first side plate, a second side plate and an end plate, and the two first side plates and the two second side plates are all along the vertical direction (i.e., the second direction, i.e., Figure 1 The two first side panels are arranged in parallel, the two second side panels are arranged in parallel, and the end panel is arranged between the two first side panels and the two second side panels. The two first side panels, the two second side panels, and the end panel enclose a central tube material box 11 having an opening at one end. The opening is provided as a first discharge port 111 of the central tube material box 11. A second discharge port (not shown in the figure) is provided at one end of the end panel. The first discharge port 111 and the second discharge port are connected to form a discharge channel. A plurality of central tubes 1 are provided in the discharge channel. The end panel can be tilted. The cross-sectional shape of the central tube material box 11 is a parallelogram. The central tube material box 11 has a first guide slope. The height of the end of the end panel without the second discharge port is higher than the height of the end of the end panel with the second discharge port. This allows the central tube 1 in the central tube material box 11 to move along the first guide slope into the discharge channel, facilitating the discharge of the central tube 1. Therefore, the central tube material box 11 adopts a structure with an opening, which is convenient for timely replenishing the central tube 1 into the central tube material box 11. The central tube material box 11 has a first guide slope, and the first discharge port 111 and the second discharge port are arranged at the lowest point of the central tube material box 11, which is conducive to the continuous discharge of the central tube 1, thereby further improving the efficiency of inserting the central tube.

[0038] Based on the above embodiment, as an optional embodiment, the central tube material box 11 is further provided with a top plate and a guide baffle 112. Both the top plate and the guide baffle 112 are arranged in the vertical direction. The top plate is passed through the second discharge port and is in contact with the central tube 1 in the central tube material box 11. The top plate can move in the vertical direction to push the central tube 1 out of the central tube material box 11 from the first discharge port. The pushed central tube 1 is located between the top plate and the guide baffle 112. When the guide baffle 112 moves upward in the vertical direction, the distance between the guide baffle 112 and the top plate increases, and the central tube 1 in a free state can roll into the central tube guide box 12 under the action of its own gravity. Therefore, the top plate and the guide baffle 112 cooperate to transfer the central tube 1 into the central tube guide box 12, ensuring that only one central tube 1 is in the central tube guide box 12 at a time, ensuring the accuracy and continuity of the insertion of the central tube 1.

[0039] Based on the above embodiment, as an optional implementation, the end of the guide baffle 112 that contacts the central tube 1 is configured as an inclined surface. If the end of the central tube magazine 11 where the discharge channel is provided is defined as the first end, and the end of the central tube magazine 11 facing away from the discharge channel is defined as the second end, then the distance between the inclined surface and the end plate gradually increases from the first end to the second end. Therefore, configuring the end of the guide baffle 112 that contacts the central tube 1 as an inclined surface facilitates controlling the number of central tubes 1 between the guide baffle 112 and the top plate, ensuring that only one central tube 1 is accommodated between the guide baffle 112 and the top plate at a time, thereby ensuring that only one central tube 1 is contained within the central tube guide box 12.

[0040] In an alternative embodiment, the top plate's end in contact with the central tube 1 is configured as an inclined surface, with the spacing between the inclined surface and the end plate gradually increasing from the first end to the second end. This inclined surface facilitates the rolling of the central tube 1, forcing it to roll into the central tube guide box 12 under its own weight.

[0041] On the basis of the above embodiment, as an optional embodiment, the central tube guide box 12 has a first side wall and a second side wall arranged opposite to each other in the horizontal direction, the first side wall is arranged close to the guide needle assembly 30, and the second side wall is arranged away from the guide needle assembly 30, the first side wall is provided with a first through hole, the second side wall is provided with a second through hole, the first through hole and the second through hole are coaxially arranged, the ejector pin 21 extends in the horizontal direction and passes through the second through hole on the central tube guide box 12; the central tube guide box 12 has a second guide inclined surface and a central tube accommodating groove connected thereto, the second guide inclined surface and the central tube accommodating groove are arranged between the first side wall and the second side wall, ... central tube guide box 12 has a second guide inclined surface and a central tube accommodating groove The tube accommodating groove is connected to the lowest point of the second guide inclined surface, so that the central tube 1 can roll from the second guide inclined surface to the central tube accommodating groove under the action of its own gravity. The central tube accommodating groove only accommodates one central tube 1 at a time, and the central tube accommodating groove is connected to the first through hole and the second through hole. Therefore, the central tube 1 that rolls into the central tube accommodating groove is in a state to be inserted into the battery cell 2. The central tube accommodating groove is connected to the first through hole and the second through hole, and the ejector pin 21 passes through the second through hole, so that the ejector pin 21 and the central tube 1 can be coaxially arranged, and the central tube 1 located in the central tube accommodating groove can be pushed out of the first through hole by the ejector pin 21, so as to facilitate subsequent insertion into the battery cell 2.

[0042] Based on the above embodiment, as an optional implementation method, Figure 2 As shown, the central tube guide box 12 is further provided with a sensor 121, which is used to detect whether there is a central tube 1 in the central tube guide box 12. Therefore, the provision of the sensor 121 is conducive to improving the efficiency of inserting the central tube 1 and avoiding the ejector 21 from doing useless work.

[0043] On the basis of the above-mentioned embodiments, as an optional implementation manner, the top pin assembly 20 further comprises a top pin mounting base 22 and a first sliding rail 23, the top pin 21 is mounted on the top pin mounting base 22, the top pin mounting base 22 and the first sliding rail 23 are in sliding connection, the first sliding rail 23 is arranged in extension along the horizontal direction, the first driving member 24 is connected with the top pin mounting base 22 through a first connecting member 25, the first driving member 24 drives the first connecting member 25 to slide along the horizontal direction, and the first connecting member 25 drives the top pin mounting base 22 to move on the first sliding rail 23, so that the top pin 21 moves along the horizontal direction. Specifically, the first driving member 24 can be a motor, the motor is connected with a screw rod, one end of the first connecting member 25 is arranged on the screw rod, the other end of the first connecting member 25 is connected with the top pin mounting base 22, the motor drives the screw rod to rotate to drive the first connecting member 25 to move along the horizontal direction, so as to drive the top pin mounting base 22 and the top pin 21 thereon to move along the horizontal direction through the first connecting member 25. Thus, the top pin assembly 20 adopts the above-mentioned structure, can make the top pin 21 move more stably along the horizontal direction, so as to make the center tube 1 insert the battery cell 2 more stably, avoid the phenomenon that the center tube 1 shakes when inserting the battery cell 2, and make the center tube 1 bend or tilt when inserting the battery cell 2.

[0044] On the basis of the above-mentioned embodiments, as an optional implementation manner, the top pin assembly 20 further comprises a first elastic member 26, the first elastic member 26 is arranged between the first connecting member 25 and the top pin mounting base 22, one end of the first elastic member 26 abuts against the first connecting member 25, and the other end of the first elastic member 26 abuts against the top pin mounting base 22. Thus, by arranging the first elastic member 26, the first connecting member 25 can abut against the top pin mounting base 22 elastically, so as to avoid that the rigid abutment causes the top pin mounting base 22 to bear too large force, the top pin mounting base 22 abuts against the center tube 1, and the center tube 1 bends or breaks. As an optional implementation manner, the first elastic member 26 can be a spring.

[0045] On the basis of the above-mentioned embodiments, as an optional implementation manner, in combination with Figure 7As shown, ejector pin 21 comprises a first ejector pin portion 211 and a second ejector pin portion 212 connected to each other. The first ejector pin portion 211 and the second ejector pin portion 212 are arranged horizontally. The diameter of the first ejector pin portion 211 is smaller than that of the second ejector pin portion 212, and the end of the first ejector pin portion 211 facing away from the second ejector pin portion 212 is shaped like a frustum, facilitating insertion of ejector pin 21 into the interior of the central tube 1. A first positioning portion is formed between the first and second ejector pin portions 211, 212, and is designed to abut against the first end of the central tube 1. The first ejector pin portion 211, the first positioning portion, and the second ejector pin portion 212 are stepped. As a result, when ejector pin 21 pushes the central tube 1 horizontally, the first ejector pin portion 211 can be inserted into the central tube 1, and the first positioning portion abuts against the first end of the central tube 1, ensuring smoother horizontal movement of the central tube 1 by ejector pin 21 and preventing the central tube 1 from tilting or bending due to the ejector pin 21's movement.

[0046] Based on the above embodiment, as an optional implementation, a guide hole 213 is provided in the middle of the first ejector portion 211. The guide hole 213 extends from the end of the first ejector portion 211 facing away from the second ejector portion 212 to the second ejector portion 212. The guide hole 213 is used to accommodate the guide needle 31. As a result, the guide needle 31 can be inserted into the guide hole 213 and move horizontally within the guide hole 213. This ensures that when the guide needle 31 and the ejector pin 21 drive the central tube 1 to move horizontally, the guide needle 31, the ejector pin 21, and the central tube 1 are always on the same axis, preventing the central tube 1 from tilting during movement, which may cause the battery cell to fail to be inserted. It should be noted that the horizontal extension length of the guide hole 213 is not further limited in this embodiment, and those skilled in the art can adjust it according to actual conditions.

[0047] On the basis of the above embodiment, as an optional embodiment, the guide needle assembly 30 also includes a guide needle mounting seat 32 and a second slide rail 33, the guide needle 31 is mounted on the guide needle mounting seat 32, the guide needle mounting seat 32 and the second slide rail 33 are slidably connected, the second slide rail 33 is extended in the horizontal direction, the second driving member 34 is connected to the guide needle mounting seat 32 through the second connecting member 35, the second driving member 34 drives the second connecting member 35 to slide in the horizontal direction, and drives the guide needle mounting seat 32 to move on the second slide rail 33 through the second connecting member 35, so that the guide needle 31 moves in the horizontal direction. Specifically, the second driving member 34 can be a motor, the motor is connected to the screw rod, one end of the second connecting member 35 is passed through the screw rod, and the other end of the second connecting member 35 is connected to the guide needle mounting seat 32, the motor drives the screw rod to rotate to drive the second connecting member 35 to move in the horizontal direction, thereby driving the guide needle mounting seat 32 and the guide needle 31 thereon to move in the horizontal direction through the second connecting member 35. Therefore, the guide needle assembly 30 adopts the above-mentioned structure, which can enable the guide needle 31 to move more smoothly in the horizontal direction, so that the center tube 1 can be inserted into the battery cell 2 more smoothly, avoiding the center tube 1 from shaking when inserted into the battery cell 2, causing the center tube 1 to bend or tilt when inserted into the battery cell 2.

[0048] In addition to the above embodiment, as an optional implementation, the guide needle assembly 30 further includes a second elastic member (not shown). The second elastic member is disposed between the second connector 35 and the guide needle mounting seat 32, with one end of the second elastic member abutting the second connector 35, and the other end abutting the guide needle mounting seat 32. Thus, the provision of the second elastic member allows the second connector 35 to elastically press against the guide needle mounting seat 32, preventing rigid pressure from causing excessive force on the guide needle mounting seat 32, which could cause the guide needle mounting seat 32 to press against the central tube 1 and thus cause the central tube 1 to bend or break. As an optional implementation, the second elastic member can be a spring.

[0049] Based on the above embodiment, as an optional implementation method, Figure 7As shown, the guide needle 31 includes a first guide needle portion 311, a second guide needle portion 312 and a third guide needle portion 313 connected in sequence. The first guide needle portion 311, the second guide needle portion 312 and the third guide needle portion 313 are arranged in a horizontal direction. The diameter of the first guide needle portion 311 is smaller than the diameter of the second guide needle portion 312, and the diameter of the second guide needle portion 312 is smaller than the diameter of the third guide needle portion 313. The first guide needle portion 311 and the second guide needle portion 312 can be inserted into the central tube 1, and at least part of the first guide needle portion 311 can penetrate the guide hole 213, so that the guide needle 31, the ejector pin 21 and the central tube 1 are always on the same axis. The end of the first guide needle portion 311 away from the second guide needle portion 312 is set to a cone or a frustum shape to facilitate the insertion of the guide needle 31 into the guide hole 213 and the interior of the central tube 1. A second positioning portion is formed between the second guide needle portion 312 and the third guide needle portion 313. The second positioning portion is designed to abut the second end of the central tube 1. The second positioning portion is in the shape of a frustum, and the first guide needle portion 311 and the second guide needle portion 312 are connected by a frustum-shaped transition. Thus, when the guide needle 31 is inserted into the central tube 1, the second positioning portion abuts the second end of the central tube 1, while the first positioning portion abuts the first end of the central tube 1. This ensures that the ejector pin 21 and the guide needle 31 more smoothly move the central tube 1 horizontally when pushing the central tube 1 horizontally, preventing the central tube 1 from tilting or bending during movement.

[0050] Based on the above embodiment, as an optional implementation method, Figure 4 The positioning assembly 40 includes a jaw mounting base 41, a positioning jaw 42, and a jaw lifting drive 43. The jaw mounting base 41 is connected to the side wall of the central tube magazine 11. The positioning jaw 42 and the jaw lifting drive 43 are both mounted on the jaw mounting base 41. The jaw lifting drive is used to drive the positioning jaw 42 to move vertically, thereby driving the positioning jaw 42 to move vertically. The positioning jaw 42 is used to clamp the battery cell 2 and position it to facilitate insertion of the central tube 1 into the battery cell 2. Thus, the positioning jaw 42 and the jaw lifting drive 43 can adjust the vertical height of the battery cell 2, adjusting the battery cell 2 to be coaxial with the central tube 1, thereby facilitating insertion of the central tube 1 into the battery cell 2. As an alternative embodiment, the jaw lifting drive 43 can be a pneumatic cylinder. The specific structure of the positioning jaw 42 is not further limited in this embodiment; those skilled in the art can select a commonly used jaw.

[0051] A second aspect of this embodiment provides a method for inserting a central tube of a battery cell, using the device for inserting a central tube of a battery cell described in the first aspect. The method includes the following steps:

[0052] Step S1: When the central tube 1 to be inserted rolls down from the central tube material box 11 to the central tube guide box 12, the positioning claw 42 of the positioning assembly 40 clamps the battery cell 2 and adjusts the battery cell 2 to be coaxial with the central tube 1 in the central tube guide box 12.

[0053] Among them, the position of the battery cell 2 that needs to be adjusted can be pre-calibrated according to the position of the central tube 1 in the central tube guide box 12, so that the battery cell 2 can be adjusted to be coaxial with the central tube 1 in time when the positioning clamp 42 clamps the battery cell 2, and the positioning clamp 42 can also adjust the consistency of the position of the battery cell 2.

[0054] Step S2: The guide needle 31 moves toward the battery cell 1, so that the guide needle 31 passes through the center hole of the battery cell 2 and abuts against the second end of the center tube 1. At the same time, the ejector pin 21 moves toward the battery cell 1, so that the ejector pin 21 abuts against the first end of the center tube 1 until the center tube 1 is fixed between the guide needle 31 and the ejector pin 21.

[0055] Specifically, when the guide needle assembly 30 drives the guide needle 31 to move toward the battery cell 1, the guide needle 31 can pass through the center hole of the battery cell 2 and extend into the interior of the central tube 1, and the second positioning portion exceeds the first end of the battery cell 2. The ejector needle assembly 20 drives the ejector needle 21 to move toward the battery cell 2, so that the first ejector needle portion 211 is inserted into the interior of the central tube 1, and the first positioning portion abuts against the first end of the central tube 1. Subsequently, the ejector needle 21 drives the central tube 1 to move toward the battery cell 2, so that the first guide needle portion 311 passes through the guide hole 213, so that the guide needle 31, the ejector needle 21 and the central tube 1 are on the same axis, completing the positioning of the axis of the central tube 1. Subsequently, the ejector needle 21 drives the central tube 1 to continue to move toward the battery cell 2 until the second positioning portion abuts against the second end of the central tube 1. At this time, the central tube 1 is fixed between the guide needle 31 and the ejector needle 21 (that is, as shown in FIG. Figure 5 ). The first end of the battery cell 2 refers to the end of the battery cell 2 close to the ejector pin 21.

[0056] In step S3, the guide needle 31 and the ejector pin 21 move at the same speed, so that the central tube 1 moves toward the center hole of the battery cell 2 until the central tube 1 is completely inserted into the center hole of the battery cell 2. The insertion of the central tube 1 is completed, and the guide needle 31 and the ejector pin 21 are reset to prepare for the next insertion of the central tube 1.

[0057] After the central tube 1 is fixed between the guide needle 31 and the ejector pin 21, the guide needle 31 and the ejector pin 21 move at the same speed to drive the central tube 1 toward the battery cell 2, so as to facilitate the central tube 1 to be inserted into the central hole of the battery cell 2 more smoothly until the central tube 1 is completely inserted into the central hole of the battery cell 2 (i.e., Figure 6 In this embodiment, the moving speeds of the guide needle 31 and the ejector pin 21 are not further limited, and those skilled in the art can set them according to actual conditions.

[0058] The method for inserting the center tube of the battery cell provided in this embodiment fixes the center tube through a push pin and a guide needle and drives the center tube to be inserted into the center hole of the battery cell, which can ensure that the center tube always remains on the same axis as the center hole during the process of inserting the center tube into the center hole, so that the center tube can be inserted into the center hole more stably, thereby improving the success rate and stability of the center tube insertion.

[0059] Combine Figure 8 As shown, a third aspect of this embodiment provides a battery cell conveying mechanism, comprising the battery cell center tube insertion device 3 described in the first aspect, and a conveying mechanism 4, wherein the conveying mechanism 4 is provided with a battery cell center tube insertion station, and the battery cell center tube insertion device 3 is located at the battery cell center tube insertion station. Specifically, the conveying mechanism 4 includes a conveyor belt carrying the battery cells 2, which is used to transport the battery cells 2. The surface of the conveyor belt is provided with a plurality of accommodating slots spaced along the extending direction of the conveyor belt, each accommodating a battery cell 2. The battery cell center tube insertion device 3 is mounted on the conveyor belt, and the battery cells 2 conveyed on the conveyor belt can pass through the battery cell center tube insertion device 3. Thus, when the battery cells 2 on the conveyor belt are transported to the battery cell center tube insertion device 3, the positioning assembly 40 can clamp the battery cells 2 from the conveyor belt and lift the battery cells 2 to be coaxial with the center tube 1. The center tube preparation assembly 10 and the guide needle assembly 30 cooperate to insert the center tube 1 into the center hole of the battery cells 2. In this embodiment, by arranging the battery cell center tube insertion device 3 on the conveying mechanism 4, the battery cell 2 can be continuously conveyed to the battery cell center tube insertion device 3 for insertion into the center tube 1, so that the battery cell insertion into the center tube 1 process can be better connected with the previous process and the next process, which is beneficial to improving the production efficiency of the battery cell 2.

[0060] Based on the above embodiment, as an optional implementation, the accommodating groove can be set to a V shape to limit the position of the battery cell 2, and prevent the battery cell 2 from rolling freely on the surface of the conveyor belt due to inertia during the repeated start and stop of the conveyor belt.

[0061] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A device for inserting a central tube of a battery core, characterized in that: include: A central tube material preparation assembly, comprising a central tube material box and a central tube guide box. The central tube material box is used to accommodate multiple central tubes. The central tubes in the central tube material box can roll into the central tube guide box. The central tube guide box is provided with a first through hole capable of accommodating only a single central tube. an ejector pin assembly, the ejector pin assembly comprising an ejector pin, the ejector pin being disposed on a side of the central tube guide box facing away from the first through hole, the ejector pin being configured to abut against the first end of the central tube and push the central tube out of the first through hole; a positioning assembly connected to the central tube preparation assembly and located on a side of the central tube guide box where the first through hole is formed, the positioning assembly being used to fix the battery cell; A guide needle assembly, the guide needle assembly comprising a guide needle, the guide needle being capable of passing through the central hole of the battery cell and abutting against the second end of the central tube, the central tube being capable of being fixed between the guide needle and the ejector pin; A driving member is used to drive the ejector pin and the guide pin to move, and to insert the central tube fixed by the ejector pin and the guide pin into the central hole of the battery core.

2. The battery core central tube insertion device according to claim 1, characterized in that: The center tube guide box has a first side wall and a second side wall arranged opposite to each other along a first direction, the first side wall is provided with a first through hole, the second side wall is provided with a second through hole, the first through hole and the second through hole are coaxially arranged, and the ejector pin extends along the first direction and passes through the second through hole; the center tube guide box has a second guide inclined surface and a center tube accommodating groove, the second guide inclined surface and the center tube accommodating groove are arranged between the first side wall and the second side wall, and the center tube rolls from the second guide inclined surface to the center tube accommodating groove under the action of its own gravity, and the center tube accommodating groove is connected to the first through hole and the second through hole.

3. The battery core central tube insertion device according to claim 2, characterized in that: The ejector assembly further includes an ejector mounting seat and a first slide rail, the ejector is mounted on the ejector mounting seat, the ejector mounting seat and the first slide rail are slidably connected, the first slide rail extends along a first direction, the driving member includes a first driving member, the first driving member is connected to the ejector mounting seat through a first connecting member, the first driving member drives the ejector mounting seat to move on the first slide rail, so that the ejector moves along the first direction.

4. The battery core central tube insertion device according to claim 1, characterized in that: The ejector pin includes a first ejector pin portion and a second ejector pin portion connected to each other, the first ejector pin portion and the second ejector pin portion are arranged along a first direction, the diameter of the first ejector pin portion is smaller than the diameter of the second ejector pin portion, and a first positioning portion is formed between the first ejector pin portion and the second ejector pin portion, and the first positioning portion is used to abut against the first end of the center tube.

5. The battery core central tube insertion device according to claim 4, characterized in that: A guide hole is formed in the middle of the first ejector part, and the guide hole extends to the second ejector part. The guide hole is used to accommodate the guide needle.

6. The battery core central tube insertion device according to claim 5, characterized in that: The guide needle assembly also includes a guide needle mounting seat and a second slide rail, the guide needle is mounted on the guide needle mounting seat, the guide needle mounting seat and the second slide rail are slidably connected, the second slide rail extends along the first direction, the driving member includes a second driving member, the second driving member is connected to the guide needle mounting seat through a second connecting member, the second driving member drives the guide needle mounting seat to move on the second slide rail, so that the guide needle moves along the first direction.

7. The battery core central tube insertion device according to claim 6, characterized in that: The guide needle includes a first guide needle portion, a second guide needle portion and a third guide needle portion that are connected to each other. The first guide needle portion, the second guide needle portion and the third guide needle portion are arranged along a first direction. The diameter of the first guide needle portion is smaller than the diameter of the second guide needle portion, and the diameter of the second guide needle portion is smaller than the diameter of the third guide needle portion. At least a portion of the first guide needle portion can be inserted into the guide hole. A second positioning portion is formed between the second guide needle portion and the third guide needle portion. The second positioning portion is used to abut against the second end of the central tube.

8. The battery core central tube insertion device according to claim 1, characterized in that: The positioning assembly includes a positioning clamp, a clamp lifting drive and a clamp mounting seat. The clamp mounting seat is connected to the central tube material box. The positioning clamp and the clamp lifting drive are both arranged on the clamp mounting seat. The clamp lifting drive is used to drive the positioning clamp to move along the second direction. The positioning clamp is used to clamp the battery cell and position the battery cell.

9. A method for inserting a central tube of a battery core, characterized in that: The central tube of a battery cell is inserted into the battery cell using the device for inserting the central tube of a battery cell according to any one of claims 1 to 8. The central tube of a battery cell insertion method comprises the following steps: When the central tube to be inserted rolls down from the central tube material box to the central tube guide box, the positioning assembly clamps the battery cell and adjusts the battery cell to be coaxial with the central tube in the central tube guide box; The guide needle moves toward the battery cell so that the guide needle passes through the center hole of the battery cell and abuts against the second end of the center tube. At the same time, the ejector pin moves toward the battery cell so that the ejector pin abuts against the first end of the center tube until the center tube is fixed between the guide needle and the ejector pin. The guide needle and the ejector pin move at the same speed, causing the center tube to move toward the battery cell until the center tube is completely inserted into the center hole of the battery cell. The insertion of the center tube is completed, and the guide needle and the ejector pin are reset to prepare for the next insertion of the center tube.

10. A battery cell conveying mechanism, characterized in that: It comprises a conveying mechanism and a battery core center tube insertion device as described in any one of claims 1 to 8, wherein the battery core center tube insertion device is arranged on the conveying mechanism, the conveying mechanism is used to convey the battery core, and the battery core center tube insertion device is used to insert the center tube into the center hole of the battery core.

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