A core encapsulation and welding device for a lithium battery

Abstract

The present invention relates to the technical field of welding, and discloses a welding device for encapsulating and welding lithium battery cores, including a workbench. On both sides of the top of the workbench, welding frames are fixed. At the top of the welding frames, a welding head for welding is movably arranged. The bottom of the welding frames rotates back and forth on both sides of the workbench through threaded rods. A welding plate is slidably connected to the top of the workbench. A plurality of welding interfaces for placing core strips are provided on the surface of the welding plate. A fitting mechanism is arranged on the top of the welding plate and around the welding interfaces; through the setting of the first rotating wheel, when the clamping block vertically descends along the inclined surface of the moving block, the contact between the first rotating wheel and the inclined surface of the moving block can reduce friction and avoid wear; through the setting of the balls, the smoothness of the movement of the first slider in the second chute can be increased to avoid jamming, and when placing the core strips and the battery, it can be completed on one welding plate without the need for two welding plates to be closed, so as to reduce the operation process and improve the accuracy during welding.

Description

Technical Field

[0001] The present invention relates to the field of welding, and particularly to a core encapsulation welding device for lithium batteries. Background Art

[0002] ‌Core welding‌ is a key link in the battery manufacturing process. It involves firmly connecting various parts of the battery together to ensure the normal operation and performance of the battery. In the soft connection welding of cores, the commonly used welding materials are metal materials with good electrical conductivity and high temperature resistance, such as tin wire, etc. These materials are heated and melted during the welding process and chemically react with the core polar materials to form a firm connection.

[0003] During the operation of the existing core welding, first, the core strips are neatly placed on the surface of the welding plate, then the battery is placed on another welding plate for fixation, and finally, the welding plate with the battery is covered on the welding plate with the core strips and aligned with the end of the core. Then, welding is performed between the core strips and the battery through the welding interface.

[0004] Since the battery and the core strips need to be placed separately during the operation, and the size specifications of the welding plates for the batteries are unified to align with the welding positions of the core strips, it is very difficult for the ends of the batteries and the core strips to align themselves when using batteries of different size specifications. Therefore, the welding position during welding is inaccurate, which affects the later use.

[0005] In view of this, the present invention proposes a core encapsulation welding device for lithium batteries to solve the above technical problems. Summary of the Invention

[0006] Aiming at the deficiencies of the above background art, the present invention provides a technical solution for a core encapsulation welding device for lithium batteries. When placing the core strips and the batteries, it can be completed on one welding plate without the need for two welding plates to be covered, so as to reduce the operation process and improve the accuracy during welding, and solve the problems proposed in the above background art.

[0007] The present invention provides the following technical solution: A core encapsulation welding device for lithium batteries, including a workbench. On both sides of the top of the workbench, welding frames are fixed. A welding head for welding is movably arranged on the top of the welding frames. The bottom of the welding frames rotates back and forth on both sides of the workbench through a threaded rod. A welding plate is slidably connected to the top of the workbench;

[0008] The surface of the welding plate is provided with a plurality of welding interfaces for placing the battery cell strips. A fitting mechanism is arranged on the top of the welding plate and around the welding interfaces. The fitting mechanism includes a lifting plate and a lifting block. The lifting plate is slidably connected to the surface of the welding plate between two welding interfaces through a connecting rod I. The end of the connecting rod I is fixedly connected to the lifting plate. The lifting block is slidably installed inside the welding plate. A connecting rod II is fixed on the surface of the lifting block. A fixing block III is fixed to the bottom of the connecting rod II. A rotating wheel I is rotatably connected to the lower surface of the fixing block III. A chute I is opened on the surface of the welding plate. A moving block is movably arranged inside the chute I. When the rotating wheel I contacts the inclined side of the moving block during descent, a part of the top position of the chute I is closed.

[0009] The top of the other end of the connecting rod I is fixed with a spring I. The top of the spring I is fixed to the position where a part of the top of the chute I is closed. The fitting mechanism further includes a clamping assembly.

[0010] As a preferred technical solution of the present invention, the clamping assembly includes a rotating ring. Push blocks distributed circumferentially are fixed to the inner wall of the rotating ring. A fixing block III and a slider II are arranged on the top of the welding plate. The fixing block III is fixed to the top of the welding plate. The slider II is slidably connected to the top of the welding plate. A spring II is fixed between the fixing block III and the slider II.

[0011] As a preferred technical solution of the present invention, a clamping block is fixed to the top of the slider II. A connecting block is fixed to the top of the clamping block. The rotating ring is rotatably connected to the top of the fixing block III. The surface of the push block contacts the connecting block as the rotating ring rotates, pushing the clamping block and the slider II to move on the top of the welding plate.

[0012] As a preferred technical solution of the present invention, there is a notch on the surface of the rotating ring. An inclined groove is opened at a position close to the notch. A connecting rod III is fixed to the top of the connecting rod I. A rotating wheel II is rotatably connected to the outer wall of the connecting rod III. As the connecting rod I moves up and down, the rotating wheel II slides inside the inclined groove, pushing the rotating ring to rotate.

[0013] As a preferred technical solution of the present invention, chutes II are opened at both ends of the welding plate. A card slot is opened at the middle position of the chute II. The card slot and the chute II are in a cross shape. A slider I is slidably connected inside the chute II. A support frame is rotatably connected to the surface of the slider I. Elastic blocks are connected to both the upper and lower ends inside the slider I.

[0014] As a preferred technical solution of the present invention, a ball is rotatably connected inside the elastic block. A gear is connected between the two elastic blocks. A fixing block I is fixed to the front surface of the elastic block. A fixing block II is fixed to the lower surface of the fixing block I. Two fixing rods are fixed to both sides inside the slider I.

[0015] As a preferred technical solution of the present invention, a limiting block is slidably connected to the surface of the fixed rod. The limiting block is in a right trapezoidal structure. A gear is rotatably connected to the inner wall of the slider I. The middle position of the gear penetrates outside the slider I and is connected to the end of the support frame. The gear meshes with the limiting block.

[0016] As a preferred technical solution of the present invention, when the slider I slides in the chute II to the card slot position, the clamping block pops out through the spring III and engages with the card slot.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The inclined surface of the push block contacts the rotating wheel I to push the clamping block forward in the direction of the battery to stably clamp the battery, so that the battery is in stable contact with the battery core strip, avoiding deviation during welding. And when welding a battery with a relatively thin diameter, by pushing the clamping block in the direction close to the battery by the push block, the battery with a relatively thin diameter can be clamped and fixed, avoiding that the natural ejection length of the spring II is not enough to clamp the battery with a relatively thin diameter.

[0019] 2. Through the setting of the rotating wheel I, when the clamping block vertically descends along the inclined surface of the moving block, the contact between the rotating wheel I and the inclined surface of the moving block can reduce the friction and avoid wear.

[0020] 3. Through the setting of the ball, the smoothness of the movement of the slider I in the chute II can be increased to avoid jamming. And when placing the battery core strip and the battery, it can be completed on one welding plate, without the need to cover two welding plates, so as to reduce the operation process and improve the accuracy during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is of the present invention Figure 1 partial structural schematic diagram;

[0023] Figure 3 is of the present invention Figure 2 structural schematic diagram of the welding plate in;

[0024] Figure 4 is of the present invention Figure 2 structural diagram of the welding interface in;

[0025] Figure 5 is of the present invention Figure 4 structural diagram of the rotating ring in;

[0026] Figure 6 is of the present invention Figure 5 isometric view;

[0027] Figure 7 For the present invention Figure 6 An enlarged view of the structure of A1 in the present invention;

[0028] Figure 8 For the present invention Figure 6 An enlarged view of the structure of A2 in the present invention;

[0029] Figure 9 For the present invention Figure 3 A structural diagram of slider I in the present invention;

[0030] Figure 10 For the present invention Figure 9 A schematic diagram of the internal structure of slider I in the present invention.

[0031] In the figure: 1, welding frame; 101, threaded rod; 102, welding head; 2, workbench; 3, welding plate; 301, support frame; 302, slider I; 3021, clamping block; 30211, ball; 3022, fixing block I; 3023, fixing rod; 3024, gear; 3025, limiting block; 3026, fixing block II; 3027, spring III; 303, welding joint; 304, rotating ring; 3041, inclined groove; 3042, lifting plate; 3043, lifting block; 3044, clamping block; 3045, rotating wheel I; 3046, connecting rod I; 3047, moving block; 3048, fixing block III; 3049, spring I; 3050, connecting rod II; 3051, fixing block III; 3052, spring II; 3053, slider II; 3054, connecting rod III; 3055, rotating wheel II; 3056, pushing block; 306, clamping groove. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figure 1-8 As shown, a welding device for encapsulating and welding the core of a lithium battery includes a workbench. Welding frames are fixed on both sides of the top of the workbench. A welding head for welding is movably arranged at the top of the welding frame. The bottom of the welding frame rotates back and forth on both sides of the workbench through a threaded rod. A welding plate is slidably connected to the top of the workbench;

[0034] The surface of the welding plate is provided with a plurality of welding ports for placing the battery cell strips. A fitting mechanism is arranged on the top of the welding plate and around the welding ports. The fitting mechanism includes a lifting plate and a lifting block. The lifting plate is slidably connected to the surface of the welding plate between two welding ports through a connecting rod I. The end of the connecting rod I is fixedly connected to the lifting plate. The lifting block is slidably installed inside the welding plate. A connecting rod II is fixed on the surface of the lifting block. A fixed block III is fixed at the bottom of the connecting rod II. A rotating wheel I is rotatably connected to the lower surface of the fixed block III. A chute I is provided on the surface of the welding plate. A moving block is movably arranged inside the chute I. When the rotating wheel I contacts the inclined surface of the moving block during its descent, a part of the top position of the chute I is closed;

[0035] The top of the other end of the connecting rod I is fixed with a spring I. The top of the spring I is fixed at the position where the top of the chute I is partially closed. The fitting mechanism further includes a clamping assembly;

[0036] The clamping assembly includes a rotating ring. A circumferentially distributed pushing block is fixed on the inner wall of the rotating ring. A fixed block III and a slider II are arranged on the top of the welding plate. The fixed block III is fixed to the top of the welding plate. The slider II is slidably connected to the top of the welding plate. A spring II is fixed between the fixed block III and the slider II; A clamping block is fixed on the top of the slider II. A connecting block is fixed on the top of the clamping block. The rotating ring is rotatably connected to the top of the fixed block III. When the pushing block rotates with the rotating ring and its surface contacts the connecting block, it pushes the clamping block and the slider II to move on the top of the welding plate; There is a notch on the surface of the rotating ring, and an inclined groove is provided at a position close to the notch. A connecting rod III is fixed on the top of the connecting rod I. A rotating wheel II is rotatably connected to the outer wall of the connecting rod III. When the connecting rod III moves up and down with the connecting rod I, the rotating wheel II slides inside the inclined groove to push the rotating ring to rotate.

[0037] During operation, place the battery cell strip through the lifting plate, and then place the battery on the surfaces on both sides of the welding interface. Press the bottom of the battery against the top of the lifting block, causing the lifting block, connecting rod II, and rotating wheel I to descend. The rotating wheel I descends along the inclined surface of the moving block, pushing the moving block to move away from the clamping block, thereby raising the connecting rod I and the lifting plate, enabling the battery cell strip placed on the surface of the lifting plate to be in seamless contact with the bottom of the battery. And through the setting of the connecting rod III, when the connecting rod I and the lifting plate rise, the connecting rod III rises simultaneously. The rotating wheel II slides upward inside the inclined groove, and the rotating wheel II contacts the edge inclined surface of the inclined groove, pushing the rotating ring to rotate counterclockwise. At the same time, the inclined surface of the inclined groove contacts the connecting block, pushing the clamping block to move towards the battery to stably clamp the battery, ensuring stable contact between the battery and the battery cell strip, avoiding deviation during welding. And when welding a battery with a relatively thin diameter, the inclined groove pushes the clamping block to move towards the battery to clamp and fix the battery with a relatively thin diameter, preventing the spring II from not being able to clamp the battery with a relatively thin diameter due to insufficient natural ejection length. And through the setting of the rotating wheel I, when the clamping block vertically descends along the inclined surface of the moving block, the rotating wheel I contacts the inclined surface of the moving block, which can reduce friction and avoid wear.

[0038] Embodiment 2, on the basis of Embodiment 1,

[0039] Please refer to Figure 1 and Figure 10 As shown, as a specific implementation manner of the present invention, chutes II are provided at both ends of the welding plate. A card slot is provided at the middle position of the chute II, and the card slot and the chute II are in a cross shape. A slider I is slidably connected inside the chute II. A support frame is rotatably connected to the surface of the slider I. Elastic blocks are connected to both the upper and lower ends inside the slider I; a ball is rotatably connected inside the elastic block. A connecting member is connected between the two elastic blocks. A fixing block I is fixed to the front surface of the elastic block, and a fixing block II is fixed to the lower surface of the fixing block I. Two fixing rods are fixed to both sides inside the slider I;

[0040] A limiting block is slidably connected to the surface of the fixing rod. The limiting block is in a right trapezoidal structure. A gear is rotatably connected to the inner wall of the slider I. The middle position of the gear penetrates outside the slider I and is connected to the end of the support frame. The gear meshes with the limiting block; when the slider I slides inside the chute II to the position of the card slot, the elastic block pops out through the spring III and engages with the card slot.

[0041] When placing the battery cell strip and the battery, it is necessary to turn over its welding plate so that the groove surface faces upward, and then place the battery cell strip and the battery. When turning over the welding plate, first move the slider I and the support frame to the position of the card slot at the same time, and then rotate the support frame so that it stands perpendicular to the tabletop at the top of the workbench. When the support frame rotates, it drives the gear inside the slider I to rotate at the same time. The gear meshes with the limit block, pushing the limit block to move away from the fixed block II, so that the fixed block II is located at the highest point of the inclined surface of the limit block, and the moving directions of the two limit blocks are opposite. Then, the clamping block expands outward through the generated deformation and moves into the card slot to engage with it to fix the moving distance of the slider I and the support frame. Then, the slider I on the other side moves to the outermost side and turns the support frame upward to be flush with the welding plate. Then, when turning over the welding plate, the slider I also follows the turn, so that the surface of the battery cell strip placed on the welding plate faces upward. After placing the battery cell strip and the battery, then turn over the welding plate in the reverse direction so that its bottom faces upward to facilitate the welding head to weld through the welding interface. The setting of the ball can increase the smoothness of the slider I moving in the chute II and avoid jamming. Moreover, when placing the battery cell strip and the battery, it can be completed on one welding plate without covering two welding plates, so as to reduce the operation process and improve the accuracy during welding.

[0042] It should be noted that: a sliding bolt is provided at the end of the support frame, and a socket is provided at the position where the gear penetrates the support frame. When the welding plate needs to be turned over, the bolt can be pulled out of the socket and then turned over. When the support frame needs to be rotated and stood still, the bolt is slid into the socket and then rotated and stood still.

[0043] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. At the same time, in the drawings of the present invention, the filling pattern is only for distinguishing layers and is not limited in any other way.

[0044] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A core encapsulation welding device for a lithium battery, comprising: A workbench (2), on both sides of the top of the workbench (2), there are fixed welding frames (1). On the top of the welding frames (1), there is a movable welding head (102) for welding. The bottom of the welding frame (1) rotates on both sides of the workbench (2) back and forth through a threaded rod (101). The top of the workbench (2) is slidably connected with a welding plate (3); It is characterized in that: on the surface of the welding plate (3), there are provided a plurality of welding interfaces (303) for placing core strips. On the top of the welding plate (3) and around the welding interfaces (303), there is a fitting mechanism. The fitting mechanism includes a lifting plate (3042) and a lifting block (3043). The lifting plate (3042) is slidably connected to the surface of the welding plate (3) between two welding interfaces (303) through a connecting rod I (3046). The end of the connecting rod I (3046) is fixedly connected to the lifting plate (3042). The lifting block (3043) is slidably installed inside the welding plate (3). On the surface of the lifting block (3043), there is fixedly connected a connecting rod II (3050). At the bottom of the connecting rod II (3050), there is a fixed block III (3048). The lower surface of the fixed block III (3048) is rotatably connected with a rotating wheel I (3045). On the surface of the welding plate (3), there is provided a chute I. Inside the chute I, there is a movable block (3047). When the rotating wheel I (3045) contacts the inclined side surface of the movable block (3047) during its descent, a part of the top position of the chute I is closed; At the top of the other end of the connecting rod I (3046), there is a fixed spring I (3049). The top of the spring I (3049) is fixed to the position where a part of the top of the chute I is closed. The fitting mechanism further includes a clamping assembly.

2. The core encapsulation and welding device for a lithium battery according to claim 1, characterized in that: The clamping assembly includes a rotating ring (304). On the inner wall of the rotating ring (304), there are fixedly connected circumferentially distributed push blocks (3056). On the top of the welding plate (3), there are a fixed block III (3051) and a slider II (3053). The fixed block III (3051) is fixed to the top of the welding plate (3). The slider II (3053) is slidably connected to the top of the welding plate (3). Between the fixed block III (3051) and the slider II (3053), there is a fixed spring II (3052).

3. The core encapsulation and welding device for a lithium battery according to claim 2, wherein: At the top of the slider II (3053), there is a clamping block (3044). At the top of the clamping block (3044), there is a connecting block. The rotating ring (304) is rotatably connected to the top of the fixed block III (3051). As the push block (3056) rotates with the rotating ring (304), its surface contacts the connecting block to push the clamping block (3044) and the slider II (3053) to move on the top of the welding plate (3).

4. A core encapsulation and welding device for a lithium battery according to claim 3, characterized in that: The surface of the rotating ring (304) has a notch, and an inclined groove (3041) is provided near the notch. The top of the connecting rod I (3046) is fixed with a connecting rod III (3054). The outer wall of the connecting rod III (3054) is rotatably connected with a rotating wheel II (3055). As the connecting rod I (3046) moves up and down, the rotating wheel II (3055) is located inside the inclined groove (3041) and slides to push the rotating ring (304) to rotate.

5. The battery cell encapsulation and welding device for a lithium battery according to claim 4, characterized in that: Both ends of the welding plate (3) are provided with chute II, and a card slot (306) is provided at the middle position of the chute II. The card slot (306) and the chute II are in a cross shape. A slider I (302) is slidably connected inside the chute II. The surface of the slider I (302) is rotatably connected with a support frame (301). Elastic blocks (3021) are connected to both the upper and lower ends inside the slider I (302).

6. The core encapsulation and welding device for a lithium battery according to claim 5, characterized in that: A ball (30211) is rotatably connected inside the elastic block (3021). A gear (3024) is connected between the two elastic blocks (3021). A fixed block I (3022) is fixed on the front surface of the elastic block (3021). A fixed block II (3026) is fixed on the lower surface of the fixed block I (3022). Two fixed rods (3023) are fixed on both sides inside the slider I (302).

7. The core encapsulation and welding device for a lithium battery according to claim 6, wherein: A limiting block (3025) is slidably connected to the surface of the fixed rod (3023). The limiting block (3025) is in a right trapezoid structure. A gear (3024) is rotatably connected to the inner wall of the slider I (302). The middle position of the gear (3024) penetrates outside the slider I (302) and is connected to the end of the support frame (301). The gear (3024) meshes with the limiting block (3025).

8. A core encapsulation and welding device for a lithium battery according to claim 7, characterized in that: When the slider I (302) slides inside the chute II to the position of the card slot (306), the elastic blocks (3021) pop out through the spring (3027) and are engaged with the card slot (306).

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