Weld neck device

Abstract

The application discloses a welding necking device and belongs to the technical field of battery manufacturing equipment. The welding necking device comprises a welding mechanism and a necking mechanism. The welding mechanism is used for welding the end of a battery. The necking mechanism comprises a sleeve and a necking die. The sleeve is connected with the welding mechanism. The necking die can be contracted along the first direction of the battery to clamp the battery, or the necking die can be expanded along the first direction of the battery to release the battery. The sleeve and the necking die can move relatively in the second direction of the battery to make the sleeve fold or release the necking die. The first direction and the second direction intersect. The welding necking device can improve the production efficiency. The structure of the welding necking device is compact, the floor space is reduced, and the equipment procurement, installation and maintenance costs can be reduced.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing equipment technology, and in particular to a welding necking device. Background Technology

[0002] In the battery manufacturing process, bottom welding and casing necking are two crucial steps. Bottom welding securely connects the battery core to the casing, ensuring the stability and conductivity of the internal structure. Casing necking shapes the casing opening, laying the foundation for subsequent processes such as grooving and sealing, and directly impacts the battery's sealing performance and overall dimensional accuracy.

[0003] In related technologies, the bottom welding and casing narrowing processes for batteries (such as cylindrical batteries) generally adopt a "step-by-step processing" model, which involves using two independent sets of equipment to complete the welding and narrowing operations separately. The specific process is as follows: First, the operator places the battery to be processed on the fixture of the welding equipment and starts the equipment to complete the bottom welding of the inner core and the casing. After welding, the battery needs to be transferred manually or by a robotic arm to the designated station of the narrowing equipment, where the casing opening is narrowed and shaped. Because the welding and narrowing processes rely on two independent sets of equipment, and battery transfer is required between processes, the equipment changeover time is long, production continuity is poor, production efficiency is low, and it is difficult to meet the needs of large-scale mass production. Utility Model Content

[0004] This application provides a welding necking device that can improve production efficiency and at least partially solve the above-mentioned technical problems.

[0005] To achieve the above objective, a welding necking device is provided, comprising: A welding mechanism for welding the ends of a battery; A necking mechanism, comprising a sleeve and a necking mold, wherein the sleeve is connected to the welding mechanism, and the necking mold can shrink along a first direction of the battery to clamp the battery, or the necking mold can expand along the first direction of the battery to release the battery; The sleeve and the constriction mold are capable of moving relative to each other in a second direction of the battery, so that the sleeve retracts or releases the constriction mold, and the first direction and the second direction intersect.

[0006] In some embodiments, the battery includes an inner core and a housing, the housing having side walls and a bottom wall, the side walls and the bottom wall surrounding a cavity, and the inner core being located within the cavity; The welding necking device also includes a lifting mechanism, which drives the battery to move along a second direction of the battery to apply a thrust toward the bottom wall to the inner core, so that the inner core is abutted against the bottom wall.

[0007] In some embodiments, the welding mechanism includes a welding assembly and a welding head, the welding head being connected to one end of the welding assembly in the second direction, the welding head being used to apply a thrust toward the lifting mechanism to the bottom wall, such that the inner core is abutted against the bottom wall.

[0008] In some embodiments, one end of the sleeve in the second direction is connected to the welding assembly and sleeved around the outer periphery of the welding pressure head, and the sleeve is coaxially arranged with the welding pressure head.

[0009] In some embodiments, the lifting mechanism includes a sleeve, a lifting portion, and a first elastic element, wherein the sleeve is connected to the lifting portion in the second direction, and the first elastic element is sleeved on the outer periphery of the lifting portion.

[0010] In some embodiments, a first limiting portion is provided on the side of the sleeve near the welding mechanism; The lifting part has a second limiting part and a third limiting part arranged opposite to each other in the second direction. The second limiting part is slidably connected to the sleeve, and the second limiting part is located on the side of the first limiting part away from the welding mechanism. Wherein, the outer diameter of the second limiting part is larger than the inner diameter of the first limiting part, and the first elastic member is located between the first limiting part and the third limiting part.

[0011] In some embodiments, the welding necking device further includes a conveying mechanism, which includes a guide rail, a cup holder, and a first driving member. The cup holder is used to carry the battery and is disposed on the guide rail. The first driving member is used to drive the cup holder to move along the guide rail. The guide rail is provided with a first through hole, the cup is provided with a second through hole communicating with the first through hole, and at least a part of the lifting mechanism can pass through the first through hole and the second through hole.

[0012] In some embodiments, the necking mechanism further includes a base, on which a fourth limiting portion is provided, and the necking mold is provided with a fifth limiting portion. The base and the necking mold are connected through the fourth limiting portion and the fifth limiting portion to restrict the movement of the necking mold along the second direction of the battery.

[0013] In some embodiments, the base includes a body portion and a fixing portion, the fixing portion being disposed on the side of the body portion facing the welding mechanism, the body portion and the fixing portion surrounding to form the fourth limiting portion, and at least a portion of the fifth limiting portion being disposed within the fourth limiting portion.

[0014] In some embodiments, the necking mold includes a plurality of clamping blocks distributed circumferentially along the battery.

[0015] In some embodiments, a second elastic member is provided between adjacent clamping blocks, the second elastic member being used to apply elastic force to the clamping blocks to separate the adjacent clamping blocks from each other.

[0016] In the welding necking device of this application embodiment, by setting up a welding mechanism and a necking mechanism, the welding and necking processes are completed in the same equipment, avoiding or reducing intermediate transfer, positioning and waiting time, thereby realizing the continuity of battery production, significantly shortening the production cycle of a single battery, improving battery production efficiency, and meeting the needs of large-scale mass production. In addition, the welding necking device of this application has a compact structure, reduces the floor space, and can also reduce equipment procurement, installation and maintenance costs.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0020] Figure 1 This is an exploded structural diagram of the welding necking device provided in an exemplary embodiment of this disclosure; Figure 2 This is a planar structural schematic diagram of the welding necking device provided in an exemplary embodiment of this disclosure from one perspective; Figure 3 It is along Figure 2 Schematic diagram of the cross section of line AA; Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the middle; Figure 5This is a three-dimensional structural schematic diagram of the welding necking device provided in an exemplary embodiment of this disclosure; Figure 6 This is a planar structural schematic diagram of the welding necking device provided in an exemplary embodiment of this disclosure from another perspective; Figure 7 This is an exploded structural diagram of the necking mold provided in an exemplary embodiment of this disclosure.

[0021] Explanation of reference numerals in the attached figures: 1. Welding mechanism; 11. Welding assembly; 12. Welding head; 121. Guide part; 122. Step part; 13. Second driving component; 2. Narrowing mechanism; 21. Sleeve; 211. First guide slope; 22. Narrowing mold; 221. Fifth limiting part; 222. Clamping block; 2221. Groove; 223. Second elastic element; 224. Second guide slope; 23. Base; 231. Fourth limiting part; 232. Body part; 233. Fixing part; 3. Lifting mechanism; 31. Sleeve; 311. First limiting part; 32. Lifting part; 321. Second limiting part; 322. Third limiting part; 33. First elastic element; 34. Third driving element; 4. Conveying mechanism; 41. Guide rail; 411. First through hole; 412. Guide baffle; 42. Cup holder; 421. Second through hole; 43. First driving element; 200. Battery; 210. Inner core; 220. Shell; 230. Side wall; 240. Bottom wall; 250. Opening; 260. Cavity. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to up, down, left, and right in the actual use or working state of the device, specifically the drawing directions in the accompanying drawings.

[0023] In this application, unless otherwise expressly specified and limited, the terms "connected," "linked," "stacked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] This application provides a welding necking device, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0025] Reference Figures 1 to 3 One embodiment of this application provides a welding necking device for welding and necking a battery 200. This application uses the welding necking device for welding and necking a cylindrical battery 200 as an example. The battery 200 may include an inner core 210 and a casing 220. The casing 220 has a side wall 230 and a bottom wall 240, which together form a cavity 260. The inner core 210 is located within the cavity 260. The side wall 230 may be cylindrical, and the bottom wall 240 is located at one end of the side wall 230. The other end of the side wall 230 has an opening 250. The welding necking device may include a welding mechanism 1 and a necking mechanism 2. The welding mechanism 1 is used to weld the inner core 210 to the bottom wall 240 of the casing 220, and the necking mechanism 2 is used to neck one end of the opening 250 of the side wall 230.

[0026] Specifically, welding mechanism 1 is used to weld the ends of battery 200. Welding mechanism 1 can be a laser welding mechanism, used to emit welding energy to the welding part of battery 200 to weld the inner core 210 to the bottom wall 240 of casing 220 together.

[0027] Reference Figure 1 The necking mechanism 2 may include a sleeve 21 and a necking mold 22. The sleeve 21 may be cylindrical in shape and connected to the welding mechanism 1. The sleeve 21 may be positioned on the side of the welding mechanism 1 facing the battery 200. The necking mold 22 may contract along a first direction of the battery 200 to clamp the battery 200, or it may expand along the first direction of the battery 200 to release the battery 200. As an example, when the sleeve 21 is fitted onto the outer circumferential surface of the necking mold 22, the sleeve 21 may apply a contraction force to the necking mold 22, causing the necking mold 22 to contract along the first direction of the battery 200. The necking mold 22 may apply a contraction force along the first direction of the battery 200 to the battery 200, thereby necking the casing 220 of the battery 200. When the sleeve 21 separates from the necking mold 22, the necking mold 22 expands along the first direction of the battery 200, thereby releasing the battery 200. When the battery 200 is a cylindrical battery 200, the first direction can be the radial direction of the battery 200.

[0028] In some implementations, refer to Figure 3The end of the sleeve 21 facing the necking mold 22 may be provided with a first guide slope 211 that gradually narrows from bottom to top, and the outer side of the end of the necking mold 22 facing the sleeve 21 may be provided with a second guide slope 224 that gradually narrows from bottom to top. The first guide slope 211 of the sleeve 21 matches the second guide slope 224 of the necking mold 22, thus having a guiding function so that the sleeve 21 can be fitted onto the necking mold 22.

[0029] The inner side of the necking mold 22 is provided with a forming surface adapted to the necking forming requirements of the housing 220. The surface of the forming surface can be polished to ensure that the surface of the housing 220 after necking is free of scratches and wrinkles. As an example, the diameter of the forming surface can gradually decrease from bottom to top, and the reduction degree is determined according to the battery model 200.

[0030] The sleeve 21 and the necking mold 22 are movable relative to each other in the second direction of the battery 200, so that the sleeve 21 retracts or releases the necking mold 22, and the first and second directions intersect. That is, when the sleeve 21 moves along the second direction of the battery 200, the necking mold 22 will not move along the second direction of the battery 200. Or, when the necking mold 22 can move along the second direction of the battery 200, the sleeve 21 will not move along the second direction of the battery 200. Or, the sleeve 21 and the necking mold 22 can move towards each other simultaneously in the second direction of the battery 200.

[0031] In this embodiment, the sleeve 21 can move along the second direction of the battery 200, while the necking mold 22 does not move along the second direction of the battery 200. That is, the sleeve 21 can move relative to the necking mold 22 in the second direction of the battery 200. When the sleeve 21 moves toward the necking mold 22, the sleeve 21 retracts the necking mold 22, and the necking mold 22 clamps the casing 220 of the battery 200 to neck the casing 220 of the battery 200. When the sleeve 21 moves away from the necking mold 22, the sleeve 21 releases the necking mold 22, the necking mold 22 releases the casing 220 of the battery 200, and the battery 200 can be removed from the necking mold 22.

[0032] When the battery 200 is a cylindrical battery 200, the second direction can be the axial direction of the battery 200, and the first and second directions are perpendicular to each other. In this application, the second direction coincides with the direction of gravity, that is, the second direction, the direction of gravity, and the vertical direction coincide with each other, and the welding mechanism 1 can move in the vertical direction.

[0033] In this application, by setting up a welding mechanism 1 and a necking mechanism 2, the welding and necking processes are completed in the same equipment, avoiding or reducing intermediate transfer, positioning and waiting time, thereby achieving continuous production of battery 200, significantly shortening the production cycle of a single battery 200, improving the production efficiency of battery 200, and meeting the needs of large-scale mass production. In addition, the welding and necking device of this application has a compact structure, reduces the floor space, and can also reduce equipment procurement, installation and maintenance costs.

[0034] In some embodiments, refer to Figure 1 and Figure 3 The welding necking device may further include a lifting mechanism 3, which may be located below the welding mechanism 1. The lifting mechanism 3 is used to drive the battery 200 to move along a second direction of the battery 200 to move the battery 200 to a first preset position, such as moving the battery 200 to a specified height. The bottom wall 240 of the housing 220 faces the welding mechanism 1, and the opening of the housing faces the lifting mechanism 3, that is, the bottom wall 240 of the housing 220 faces upward and the opening of the housing faces downward. One end of the lifting mechanism 3 may be inserted into the housing 220 and contact the inner core 210. The lifting mechanism 3 is used to apply a pushing force to the inner core 210 towards the bottom wall 240, which not only moves the inner core 210 and the housing 220 together to the first preset position, but also allows the inner core 210 to be placed close to the bottom wall 240 under the action of gravity, thus facilitating the welding of the inner core 210 to the bottom wall 240 of the housing 220.

[0035] In some embodiments, refer to Figure 1 and Figure 3The welding mechanism 1 may further include a welding assembly 11 and a welding head 12. The welding head 12 is connected to one end of the welding assembly 11 in a second direction, that is, the welding head 12 may be disposed on the side of the welding assembly 11 facing the battery 200. The welding head 12 is used to apply a thrust toward the lifting mechanism 3 to the bottom wall 240 so that the inner core 210 is abutted against the bottom wall 240. In other words, the welding head 12 applies a downward thrust to the housing 220, and the lifting mechanism 3 applies an upward thrust to the inner core 210, which can make the inner core 210 fit more tightly against the bottom wall 240, eliminate the gap between the inner core 210 and the bottom wall 240, ensure that energy can be effectively transferred during welding, avoid defects such as incomplete welding and false welding, and thus improve the quality of welding. Meanwhile, the welding head 12 is connected to the welding assembly 11. When the welding assembly 11 moves downward, the welding head 12 contacts and presses against the bottom wall 240 of the housing 220. At this time, the distance between the bottom wall 240 of the housing 220 and the welding assembly 11 remains unchanged. This ensures that the distance between different batteries 200 and the welding assembly 11 is the same, thereby ensuring the consistency of welding and improving the quality of welding. Moreover, it eliminates the need to frequently adjust parameters such as the laser focal length due to the height difference of the batteries 200, thereby improving the efficiency of welding.

[0036] As an example, the welding assembly 11 may include a laser generator (not shown), a laser transmission fiber (not shown), and a laser head (not shown). The laser generator can generate a laser, and the laser power can be adjusted according to the battery 200 model to ensure the connection strength between the inner core 210 and the bottom wall 240.

[0037] The welding head 12 can be cylindrical in shape and can abut against the edge of the bottom wall 240, thus preventing the welding head 12 from obstructing the welding area on the battery 200. In some examples, the welding head 12 can also be other shapes, which can be set according to actual needs.

[0038] As an example, refer to Figure 1 and Figure 3 The welding head 12 may have a guide portion 121 at the end facing the battery 200 to facilitate docking between the welding head 12 and the battery 200. A stepped portion 122 may be provided inside the welding head 12, such as an annular step, with an inner diameter smaller than the outer diameter of the housing 220. When the welding assembly 11 descends, the welding head 12 descends synchronously, allowing part of the battery 200 to be inserted into the welding head 12. As the welding assembly 11 continues to descend, the stepped portion 122 of the welding head 12 contacts and presses against the edge of the bottom wall 240 of the housing 220.

[0039] Reference Figure 1 and Figure 3One end of the sleeve 21 in the second direction is connected to the welding assembly 11 and is fitted around the outer periphery of the welding pressure head 12, with the sleeve 21 and the welding pressure head 12 being coaxially arranged. This ensures that the battery 200 is subjected to more uniform force, thereby avoiding or reducing deformation of the battery 200, and the shrinking force on the battery 200 is also more uniform and symmetrical, which can improve the quality and consistency of shrinking. In some embodiments, the sleeve 21, the shrinking mold 22, and the welding pressure head 12 are coaxially arranged, which not only improves the quality and consistency of shrinking, but also ensures that the welding spot is located at the center of the battery 200, which can improve the quality of welding. As an example, the coaxiality of the sleeve 21, the welding pressure head 12, and the shrinking mold 22 is ≤0.01mm.

[0040] As an example, refer to Figure 1 and Figure 3 The welding mechanism 1 may also include a second driving element 13, such as a motor. The output end of the second driving element 13 can be connected to the welding assembly 11. The second driving element 13 can drive the welding assembly 11 and its connected welding pressure head 12 and sleeve 21 to move back and forth along the second direction of the battery 200. The welding assembly 11 drives the sleeve 21 to move back and forth along the second direction of the battery 200, thereby realizing the retraction or release of the sleeve 21 from the shrinking mold 22. The second driving element 13 can realize the automatic movement of the welding assembly 11 along the second direction, thereby improving production efficiency and the accuracy of the movement of the welding assembly 11, thereby improving the welding quality.

[0041] In some embodiments, refer to Figure 3 and Figure 4 The lifting mechanism 3 may include a sleeve 31, a lifting part 32, and a first elastic element 33, such as a spring. The sleeve 31 is connected to the lifting part 32 in the second direction. The sleeve 31 may be cylindrical in shape. The lifting part 32 is slidably inserted into the sleeve 31. The first elastic element 33 is sleeved on the outer periphery of the lifting part 32.

[0042] Reference Figure 3 and Figure 4 The sleeve 31 may have a first limiting part 311 on the side near the welding mechanism 1. The first limiting part 311 may be, for example, an annular boss. The lifting part 32 has a second limiting part 321 and a third limiting part 322 disposed opposite to each other in the second direction. The second limiting part 321 is slidably connected to the sleeve 31, and the second limiting part 321 is located on the side of the first limiting part 311 away from the welding mechanism 1.

[0043] The second limiting part 321 has an outer diameter larger than the inner diameter of the first limiting part 311. The second limiting part 321 is located on the side of the first limiting part 311 facing away from the welding mechanism 1, preventing the lifting part 32 from dislodging from the sleeve 31. The outer diameter of the first elastic member 33 is smaller than the inner diameter of the first limiting part 311, and the inner diameter of the first elastic member 33 is smaller than the outer diameter of the third limiting part 322. The first elastic member 33 is sleeved on the lifting part 32 and located between the first limiting part 311 and the third limiting part 322. The first elastic member 33 provides a certain buffering function to the lifting part 32. When the lifting battery 200 encounters resistance, the first elastic member 33 can be compressed, preventing rigid impact damage to the battery 200. Simultaneously, the first elastic member 33 ensures that the lifting part 32 provides stable support for the battery 200.

[0044] As an example, refer to Figure 1 and Figure 3 The lifting mechanism 3 may also include a third driving element 34, such as a motor or cylinder. The output end of the third driving element 34 can be connected to the sleeve 31. The third driving element 34 can drive the sleeve 31 to move back and forth along the second direction of the battery 200. The sleeve 31 drives the lifting part 32 and the first elastic element 33 to move back and forth along the second direction of the battery 200. The third driving element 34 can realize the automatic movement of the sleeve 31, the lifting part 32 and the first elastic element 33 along the second direction, thereby improving production efficiency and the accuracy of the movement of the sleeve 31, the lifting part 32 and the first elastic element 33.

[0045] In some embodiments, refer to Figure 1 and Figure 3 The welding necking device may further include a conveying mechanism 4, which may be located below the welding mechanism 1. The conveying mechanism 4 is used for automatic loading and unloading of the battery 200, transporting the battery 200 to be processed to a designated processing position, and transferring the processed battery 200 to the next process. The conveying mechanism 4 may include a guide rail 41, a cup 42, and a first driving member 43. The cup 42 is used to support the battery 200 and is disposed on the guide rail 41. The first driving member 43 is used to drive the cup 42 to move along the guide rail 41; the first driving member 43 may be, for example, a cylinder. Guide baffles 412 are symmetrically arranged on both sides of the upper surface of the guide rail 41 along its length direction to laterally limit and guide the movement of the cup 42, ensuring that the cup 42 moves smoothly along a preset direction.

[0046] Among them, reference Figure 3 The guide rail 41 may be provided with a first through hole 411, and the cup 42 may be provided with a second through hole 421 communicating with the first through hole 411. At least a portion of the lifting mechanism 3 can pass through the first through hole 411 and the second through hole 421, thereby lifting the battery 200 in the cup 42 to a first preset position.

[0047] As an example, the conveying mechanism 4 may also include a limiter (not shown) and a sensor (not shown). The sensor may be mounted on the guide rail 41 and used to detect the position of the cup holder 42, while the limiter is used to restrict the position of the cup holder 42. When the sensor detects that the cup holder 42 has moved to a second preset position, such as the position where the second through hole 421 of the cup holder 42 corresponds to the first through hole 411, the limiter can restrict the movement of the cup holder 42 so that the first through hole 411 and the second through hole 421 are aligned and connected, ensuring that the lifting mechanism 3 can pass through the first through hole 411 and the second through hole 421.

[0048] In some embodiments, refer to Figure 1 and Figure 3 The necking mechanism 2 may further include a base 23 for supporting the necking mold 22. A fourth limiting part 231 may be provided on the base 23, and a fifth limiting part 221 may be provided on the necking mold 22. The base 23 and the necking mold 22 are connected by the fourth limiting part 231 and the fifth limiting part 221 to restrict the movement of the necking mold 22 along the second direction of the battery 200, and the necking mold 22 undergoes radial contraction and expansion movements under the action of the sleeve 21. When the fourth limiting part 231 is a limiting groove, the fifth limiting part 221 may be a protrusion extending from the necking mold 22 towards the limiting groove, and the protrusion may be located within the limiting groove. When the fourth limiting part 231 is a protrusion extending from the base 23 towards the necking mold 22, the fifth limiting part 221 may be a limiting groove, and the protrusion may be located within the limiting groove.

[0049] As an example, refer to Figure 1 and Figure 5 The base 23 may include a body portion 232 and a fixing portion 233. The fixing portion 233 is disposed on the side of the body portion 232 facing the welding mechanism 1, and the body portion 232 and the fixing portion 233 can be fixedly connected. The body portion 232 and the fixing portion 233 may surround to form a fourth limiting portion 231, and at least a portion of the fifth limiting portion 221 is disposed within the fourth limiting portion 231. That is, the fourth limiting portion 231 is a limiting groove, and the fifth limiting portion 221 is a protrusion extending from the shrinking mold 22 toward the limiting groove.

[0050] In some embodiments, refer to Figure 6 and Figure 7 The necking mold 22 can adopt a segmented structure and may include multiple clamping blocks 222 distributed along the circumference of the battery 200. When closed, they form a complete circular cavity, reducing the diameter of the battery 200's casing 220. As an example, there are three clamping blocks 222, which are evenly distributed along the circumference of the battery 200.

[0051] Reference Figure 6 and Figure 7A second elastic element 223 may be provided between adjacent clamping blocks 222. The second elastic element 223 may be, for example, a spring sheet or a compression spring. The second elastic element 223 is used to apply elastic force to the clamping blocks 222 so that the adjacent clamping blocks 222 separate from each other. When the sleeve 21 moves upward to release the mold, the clamping blocks 222 can automatically separate from each other after the external force disappears and return to the open state. The battery 200 can automatically fall into the cup 42 under the action of gravity.

[0052] Reference Figure 7 The clamping block 222 may be provided with a groove 2221. The two ends of the second elastic member 223 may be located in the groove 2221 of the adjacent clamping block 222 respectively. This can prevent the second elastic member 223 from falling off and ensure the stability of the position of the second elastic member 223. It can also ensure that the second elastic member 223 applies a stable elastic force to the clamping block 222, thereby ensuring that the clamping blocks 222 can automatically separate from each other and return to the open state after the external force disappears.

[0053] As an example, the working process of the welding necking device is as follows: The battery 200 to be processed is placed in the cup 42, and the first driving member 43 drives the cup 42 to move along the guide rail 41, and the cup 42 moves to the second preset position. The third driving component 34 drives the sleeve 31 to rise, and the sleeve 31 drives the lifting part 32 and the first elastic component 33 to rise simultaneously, passing through the first through hole 411 and the second through hole 421, lifting the battery 200 to the first preset position, i.e., the specified height, at which time the bottom wall 240 of the battery 200 faces upward. The second driving component 13 drives the welding assembly 11 to move downward, and the welding assembly 11 drives the welding head 12 to move downward synchronously. The welding head 12 contacts the bottom wall 240 of the housing 220 and works in conjunction with the lifting mechanism 3 to make the inner core 210 abut against the bottom wall 240 of the housing 220. Welding assembly 11 is activated, and welding assembly 11 welds the inner core 210 to the bottom wall 240 together; The second driving component 13 drives the welding assembly 11 to continue to descend, the welding assembly 11 drives the sleeve 21 to continue to descend, and the sleeve 21 drives the shrinking mold 22 to shrink the shell 220. The second driving component 13 drives the welding assembly 11 to move upward, the welding assembly 11 drives the sleeve 21 to move upward, the sleeve 21 separates from the shrinking mold 22, the clamping blocks 222 separate from each other under the elastic force of the second elastic component 223, the third driving component 34 drives the sleeve 31 to move downward, and the battery 200 falls back to the cup 42 under the action of gravity.

[0054] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0055] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0056] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0057] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A welding necking device, characterized in that, include: Welding mechanism (1), the welding mechanism (1) is used to weld the ends of the battery (200); A necking mechanism (2) is provided, comprising a sleeve (21) and a necking mold (22). The sleeve (21) is connected to the welding mechanism (1). The necking mold (22) can retract along a first direction of the battery (200) to clamp the battery (200), or the necking mold (22) can expand along a first direction of the battery (200) to release the battery (200). The sleeve (21) and the constriction mold (22) are capable of moving relative to each other in a second direction of the battery (200) so that the sleeve (21) retracts or releases the constriction mold (22), and the first direction and the second direction intersect.

2. The welding necking device according to claim 1, characterized in that, The battery (200) includes an inner core (210) and a housing (220), the housing (220) having a side wall (230) and a bottom wall (240), the side wall (230) and the bottom wall (240) surrounding to form a cavity (260), the inner core (210) being located within the cavity (260); The welding necking device further includes a lifting mechanism (3), which is used to drive the battery (200) to move along the second direction of the battery (200) to apply a thrust toward the bottom wall (240) to the inner core (210), so that the inner core (210) is abutted against the bottom wall (240).

3. The welding necking device according to claim 2, characterized in that, The welding mechanism (1) includes a welding assembly (11) and a welding head (12). The welding head (12) is connected to one end of the welding assembly (11) in the second direction. The welding head (12) is used to apply a thrust toward the lifting mechanism (3) to the bottom wall (240), so that the inner core (210) is abutted against the bottom wall (240).

4. The welding necking device according to claim 3, characterized in that, One end of the sleeve (21) in the second direction is connected to the welding assembly (11) and sleeved on the outer periphery of the welding head (12), and the sleeve (21) and the welding head (12) are coaxially arranged.

5. The welding necking device according to claim 2, characterized in that, The lifting mechanism (3) includes a sleeve (31), a lifting part (32) and a first elastic element (33). The sleeve (31) is connected to the lifting part (32) in the second direction, and the first elastic element (33) is sleeved on the outer periphery of the lifting part (32).

6. The welding necking device according to claim 5, characterized in that, The sleeve (31) is provided with a first limiting part (311) on the side near the welding mechanism (1); The lifting part (32) has a second limiting part (321) and a third limiting part (322) arranged opposite to each other in the second direction. The second limiting part (321) is slidably connected to the sleeve (31), and the second limiting part (321) is located on the side of the first limiting part (311) away from the welding mechanism (1). The outer diameter of the second limiting part (321) is larger than the inner diameter of the first limiting part (311), and the first elastic member (33) is located between the first limiting part (311) and the third limiting part (322).

7. The welding necking device according to claim 2, characterized in that, The welding necking device also includes a conveying mechanism (4), which includes a guide rail (41), a cup (42) and a first driving member (43). The cup (42) is used to carry the battery (200). The cup (42) is disposed on the guide rail (41). The first driving member (43) is used to drive the cup (42) to move along the guide rail (41). The guide rail (41) is provided with a first through hole (411), the cup (42) is provided with a second through hole (421) communicating with the first through hole (411), and at least a portion of the lifting mechanism (3) can pass through the first through hole (411) and the second through hole (421).

8. The welding necking device according to any one of claims 1-7, characterized in that, The necking mechanism (2) further includes a base (23), on which a fourth limiting part (231) is provided, and the necking mold (22) is provided with a fifth limiting part (221). The base (23) and the necking mold (22) are connected through the fourth limiting part (231) and the fifth limiting part (221) to restrict the necking mold (22) from moving along the second direction of the battery (200).

9. The welding necking device according to claim 8, characterized in that, The base (23) includes a body part (232) and a fixing part (233). The fixing part (233) is disposed on the side of the body part (232) facing the welding mechanism (1). The body part (232) and the fixing part (233) surround to form the fourth limiting part (231). At least a portion of the fifth limiting part (221) is disposed within the fourth limiting part (231).

10. The welding necking device according to any one of claims 1-7, characterized in that, The narrowing mold (22) includes a plurality of clamping blocks (222) which are distributed circumferentially along the battery (200).

11. The welding necking device according to claim 10, characterized in that, A second elastic element (223) is provided between adjacent clamping blocks (222), the second elastic element (223) is used to apply elastic force to the clamping blocks (222) so that the adjacent clamping blocks (222) separate from each other.

Images