An ultrasonic welding device for automotive lithium batteries

Abstract

The present invention discloses an ultrasonic welding device for automotive lithium batteries, comprising a transposition unit, including a base plate, a guide rod arranged on the inner side of the base plate, a movable block arranged on the outer side of the guide rod, a rotating rod passing through the inner side of the movable block, and a mounting plate arranged at the end of the rotating rod; a clamping unit, including a pressure plate hinged to the mounting plate, a push rod arranged on the inner side of the mounting plate, a push rod abutting against the push rod, and a reset member arranged on the side wall of the push rod. The beneficial effect of the present invention is that the movable block and the rotating rod are linked to each other, so that the movable block can move horizontally to drive the mounting plate installed on the top of the rotating rod to flip and move the angle, thereby adjusting the processing position of the mounting plate; thus, the processing position can be quickly converted, and the welding efficiency of the battery pack and the tab is improved.

Description

Technical Field

[0001] The invention relates to the field of ultrasonic welding, in particular to an ultrasonic welding device for automotive lithium batteries. Background Art

[0002] With the increasing popularity of electric vehicles, portable electronic devices, and energy storage systems, demand for lithium batteries has surged. The tab, also known as the current collector or electrode lead, is a core component of lithium batteries, and its welding quality is crucial to the battery's safety, energy density, and lifespan. Currently, ultrasonic welding is widely used to connect lithium battery tabs to the outer casing or internal components. This technology uses high-frequency vibrations to generate localized high temperatures to complete the weld, eliminating the need for an external heat source, reducing heat input, and effectively preventing material damage caused by overheating, thereby ensuring weld quality and overall battery performance.

[0003] In lithium battery tab welding, the traditional process requires welding metal guides on both sides of the battery pack end. This requires frequent adjustment of the position of the lithium battery to ensure that each tab can be accurately welded. Workers must manually flip the battery pack and connect the tab to its end, increasing labor intensity and reducing efficiency. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that in the existing lithium battery tab welding process, the position of the battery pack is frequently adjusted relying on manual operation, which increases the labor intensity of the workers.

[0005] The above technical problem is solved by the following technical solution: The present invention provides an ultrasonic welding device for automotive lithium batteries, which includes a transposition unit, including a base plate, a guide rod arranged on the inner side of the base plate, a movable block arranged on the outer side of the guide rod, a rotating rod passing through the inner side of the movable block, and a mounting plate arranged at the end of the rotating rod;

[0006] The clamping unit includes a pressing plate hinged to the mounting plate, a push rod arranged on the inner side of the mounting plate, a push rod in contact with the push rod, and a reset member arranged on the side wall of the push rod.

[0007] In a preferred embodiment of the ultrasonic welding device for automotive lithium batteries of the present invention: the movable block includes an axial hole penetrating through its surface;

[0008] The rotating rod includes a first connecting rod and a second connecting rod arranged at a different axis position from the first connecting rod;

[0009] The second connecting rod is adapted to the shaft hole, and the second connecting rod rotates along the axis direction of the shaft hole;

[0010] A guide groove is provided at the bottom of the base plate;

[0011] The guide groove is adapted to the first connecting rod;

[0012] The movable block moves along the direction of the guide rod, thereby driving the rotating rod to flip.

[0013] In a preferred embodiment of the ultrasonic welding device for automotive lithium batteries of the present invention: the rotating rod is connected to the mounting plate;

[0014] The guide groove includes an inclined portion, and the inclined portion is staggered with the axis of the guide rod;

[0015] The movable block moves along the horizontal direction, and the first connecting rod moves along the inner wall of the inclined portion, thereby realizing the flipping of the mounting plate connected to the second connecting rod.

[0016] In a preferred embodiment of the ultrasonic welding device for automotive lithium batteries of the present invention: a cavity is provided inside the mounting plate;

[0017] The push rod is installed inside the cavity, and the push rod passes through the side wall of the mounting plate and extends to the inside of the cavity;

[0018] The push rod and the push rod have motion trajectories that are perpendicular to each other; the push rod and the push rod are linked to each other.

[0019] In a preferred embodiment of the ultrasonic welding device for automotive lithium batteries of the present invention: the pressing plate further comprises a gusset plate provided on one side thereof;

[0020] The side wall of the mounting plate is provided with a protrusion;

[0021] The gusset plate includes a slot provided on its side wall and a detour slot provided at the bend of the gusset plate;

[0022] The slot is adapted to the protrusion;

[0023] The inner wall of the slot contacts the outer wall of the protrusion, thereby achieving fixation between the pressing plate and the mounting plate.

[0024] In a preferred embodiment of the ultrasonic welding device for automotive lithium batteries of the present invention: the push rod includes a horizontal portion and a bent portion, and the push rod is a "Z"-shaped structure;

[0025] The surface of the horizontal portion that contacts the top rod is an inclined surface;

[0026] The bent portion passes through the cavity and extends to the outside thereof.

[0027] In a preferred embodiment of the ultrasonic welding device for automotive lithium batteries of the present invention: the guide groove further includes a parallel portion communicating with the inclined portion;

[0028] The first connecting rod is adapted to the parallel portion;

[0029] The first connecting rod moves along the inner wall of the parallel portion, thereby enabling the mounting plate to move horizontally along with the movable block.

[0030] In a preferred embodiment of the ultrasonic welding device for automotive lithium batteries of the present invention: the top of the ejector pin abuts against the mounting plate;

[0031] One end of the reset member is connected to the push rod, and the other end thereof is in contact with the inner wall of the cavity;

[0032] The movement of the movable block can drive the bent portion to come into contact with the side wall of the bottom plate, thereby enabling the push rod to lift one end of the pressing plate.

[0033] In a preferred embodiment of the ultrasonic welding device for automotive lithium batteries of the present invention, further comprising:

[0034] The welding unit comprises a workbench, a conversion assembly mounted on the surface of the workbench, a welding head disposed at the end of the conversion assembly, and a welding seat adapted to the welding head;

[0035] There are two groups of conversion components, and the two groups of conversion components are symmetrically arranged on the surface of the workbench;

[0036] The bottom plate is installed on the surface of the workbench, and the bottom plate is arranged on one side of the welding seat.

[0037] The beneficial effect of the present invention is that: through the linkage between the movable block and the rotating rod, the horizontal movement of the movable block drives the mounting plate installed on the top of the rotating rod to flip the moving angle, thereby realizing the adjustment of the processing position of the mounting plate; and then the processing position can be converted more quickly, thereby improving the welding efficiency of the battery pack and the tab. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Among them:

[0039] Figure 1 shows a perspective view of a welding apparatus;

[0040] Figure 2 A schematic diagram of the connection structure between the transposition unit and the clamping unit is shown;

[0041] Figure 3 Shows a schematic diagram of the separation structure of the pressing plate and the mounting plate;

[0042] Figure 4 Shown Figure 3 A local enlarged view of point A;

[0043] Figure 5 shows a partial cross-sectional view of the mounting plate;

[0044] Figure 6 Shown Figure 5 B is a partial enlarged view;

[0045] Figure 7 Shows a schematic diagram of the exploded structure of the clamping unit.

[0046] In the figure: 1. Transposition unit; 11. Bottom plate; 111. Guide groove; 1111. Inclined portion; 1112. Parallel portion; 12. Guide rod; 13. Movable block; 131. Axial hole; 14. Rotating rod; 141. First connecting rod; 142. Second connecting rod; 15. Mounting plate; 151. Cavity; 152. Protrusion; 2. Clamping unit; 21. Pressing plate; 211. Buckle plate; 2111. Slot; 2112. Detour groove; 22. Push rod; 221. Horizontal portion; 222. Bending portion; 23. Push rod; 24. Resetting member; 3. Welding unit; 31. Workbench; 32. Conversion assembly; 33. Welding head; 34. Welding seat. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0048] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0049] Reference Figure 1 This embodiment provides an ultrasonic welding device for automotive lithium batteries, including a transposition unit 1, including a base plate 11, a guide rod 12 arranged on the inner side of the base plate 11, a movable block 13 arranged on the outer side of the guide rod 12, a rotating rod 14 passing through the inner side of the movable block 13, and a mounting plate 15 arranged at the end of the rotating rod 14.

[0050] In this embodiment, the movable block 13 is moved in the horizontal direction to drive the rotating rod 14 to rotate, so that the mounting plate 15 arranged at the top of the rotating rod 14 is flipped while moving, thereby ensuring that the battery pack clamped inside the mounting plate 15 is flipped one hundred and eighty degrees along the horizontal plane, thereby changing the processing position of the battery pack, making the welding process between the tab and the battery pack more efficient.

[0051] Furthermore, there are two groups of guide rods 12, which are symmetrically arranged on both sides of the base plate 11, and a through hole adapted to the guide rods 12 is opened inside the movable block 13; the two groups of guide rods 12 ensure that the movable block 13 moves in the horizontal direction.

[0052] It should be noted that a pneumatic telescopic rod M is installed on one side of the base plate 11. The output end of the pneumatic telescopic rod M is connected to the movable block 13. The telescopic movement of the output end of the pneumatic telescopic rod M can drive the movable block 13 to move; the movement of the movable block 13 can drive the rotating rod 14 to rotate, and the rotation of the rotating rod 14 can drive the battery pack clamped inside the mounting plate 15 to flip a certain angle, thereby realizing the welding of the tabs on both sides of the end of the battery pack.

[0053] Specifically, the rotating rod 14 and the mounting plate 15 are welded and fixed. The mounting plate 15 rotates with the rotating rod 14 and its angle can be flipped 180 degrees, thereby adjusting the welding position of the battery pack and the tab, thereby realizing the processing of different positions of the battery pack end.

[0054] Furthermore, the clamping unit 2 includes a pressure plate 21 hinged to the mounting plate 15 , a push rod 22 disposed on the inner side of the mounting plate 15 , a push rod 23 in contact with the push rod 22 , and a reset member 24 disposed on the side wall of the push rod 23 .

[0055] In this embodiment, the pressure plate 21 is hinged to the mounting plate 15 so that the pressure plate 21 can be flipped to press and fix the battery pack located inside the mounting plate 15; and then the position between the mounting plate 15 and the pressure plate 21 is fixed by a connecting buckle, so that the battery pack is clamped and fixed.

[0056] It should be noted that the push rod 22 is located inside the mounting plate 15, and the push rod 22 and the push rod 23 are linked; the push rod 22 moves in the horizontal direction, thereby driving the push rod 23 to move in the vertical direction; and then the push rod 23 moves in the vertical direction, thereby pushing one end of the pressure plate 21 to tilt up, so that the pressure plate 21 flips in the direction away from the mounting plate 15, thereby realizing the removal of the battery pack installed inside the mounting plate 15.

[0057] Specifically, the reset member 24 is welded and fixed to the push rod 22. When the push rod 22 pushes the push rod 23 to lift the pressure plate 21, the push rod 22 moves to compress the reset member 24, and the reset member 24 is in a compressed energy storage state. When the push rod 22 is no longer under force, the reset member 24 releases its elastic potential energy, thereby pushing the push rod 22 to reset, thereby making the end of the push rod 23 move away from the pressure plate 21.

[0058] The reset member 24 is preferably a spring structure. The reset member 24 can drive the push rod 23 to reset through its rebound force, thereby ensuring that the push rod 23 returns to its original state, thereby ensuring the next linkage.

[0059] During use, the staff places the battery pack on the mounting plate 15, and then flips the pressure plate 21 to press the battery pack against the inside of the mounting plate 15 using the pressure plate 21; then the welding between the battery pack and the tab is completed at the first workstation; the pneumatic telescopic rod is started so that its rod pushes the movable block 13 to move, and the movable block 13 moves while driving the rotating rod 14 to flip; the rotating rod 14 flips one hundred and eighty degrees during the movement, so that the other side of the battery pack end corresponds to the second workstation, and then the welding between the other side of the battery pack and the tab can be completed.

[0060] After completing the welding between the battery pack and the tab, continue to push the movable block 13 to move in the horizontal direction, so that the movable block 13 now drives the mounting plate 15 in the horizontal direction; during the movement, the mounting plate 15 drives the push rod 22 to conflict with the inner wall of the bottom plate 11; the push rod 22 squeezes the push rod 23 to move, so that the end of the push rod 23 lifts one end of the mounting plate 15, thereby releasing the pressure on the battery pack, and then it can be better for the staff to take out the processed battery pack.

[0061] As an optional embodiment, the movable block 13 includes an axial hole 131 passing through its surface; the rotating rod 14 includes a first connecting rod 141, and a second connecting rod 142 arranged at a different axial position from the first connecting rod 141; the second connecting rod 142 is adapted to the axial hole 131, and the second connecting rod 142 rotates along the axial direction of the axial hole 131; a guide groove 111 is provided at the bottom of the base plate 11; the guide groove 111 is adapted to the first connecting rod 141; the movable block 13 moves along the direction of the guide rod 12, thereby driving the rotating rod 14 to flip.

[0062] In this embodiment, in order to further ensure the cooperation between the movable block 13 and the rotating rod 14, the second connecting rod 142 passes through the axial hole 131 and extends to its outside; and the first connecting rod 141 is adapted to the guide groove 111, and the outer wall of the first connecting rod 141 is close to the inside of the guide groove 111; the movable block 13 moves in the horizontal direction while driving the second connecting rod 142 to move, and at the same time, the first connecting rod 141 moves close to the inner wall of the guide groove 111; under the cooperation between the first connecting rod 141 and the guide groove 111, the movable block 13 moves in the horizontal direction while driving the second connecting rod 142 to flip along the internal axis of the axial hole 131.

[0063] It should be noted that the axial positions of the first connecting rod 141 and the second connecting rod 142 are staggered; when the first connecting rod 141 moves along the inner wall of the inclined portion 1111, the movement trajectory of the first connecting rod 141 is an inclined groove, and the second connecting rod 142 is arranged to move along a straight line direction with the movable block 13; under the restriction of the inner wall of the inclined portion 1111, the second connecting rod 142 can be flipped along the axial direction of the shaft hole 131.

[0064] Specifically, the inclined portion 1111 is an obtuse-angle bending structure, which ensures that the first connecting rod 141 moves in the horizontal direction while also driving the second connecting rod 142 connected thereto to flip one hundred and eighty degrees; thereby adjusting the position of the mounting plate 15 close to the processing location, which can save the staff from adjusting the welding processing position of the battery pack and the tab, and better facilitate the staff to complete the processing of the battery pack.

[0065] When in use, the movable block 13 moves along the axial direction of the guide rod 12, and the movable block 13 moves while driving the second connecting rod 142 arranged inside the shaft hole 131 to move; the second connecting rod 142 drives the first connecting rod 141 connected to its bottom to move along the inner wall of the inclined portion 1111; the first connecting rod 141 moves while driving the second connecting rod 142 to flip along the axial direction of the shaft hole 131, and the flipping of the second connecting rod 142 realizes the flipping of the mounting plate 15 installed on its top; driving the mounting plate 15 to flip one hundred and eighty degrees, so that the processing position of the battery pack can be changed, thereby completing the welding of the battery pack.

[0066] In one embodiment provided in the present application, the rotating rod 14 is connected to the mounting plate 15; the guide groove 111 includes an inclined portion 1111, and the inclined portion 1111 is staggered with the axis of the guide rod 12; the movable block 13 moves in the horizontal direction, and the first connecting rod 141 moves along the inner wall of the inclined portion 1111, thereby realizing the flipping of the mounting plate 15 connected to the second connecting rod 142.

[0067] In this embodiment, the rotating rod 14 and the mounting plate 15 are fixed by means of bolt connection; the second connecting rod 142 can drive the mounting plate 15 to rotate synchronously while rotating; the inclined portion 1111 is staggered along its trajectory direction with the axial direction of the guide rod 12; the movement trajectory of the movable block 13 is staggered with the inclined portion 1111; while the movable block 13 moves in the horizontal direction, it can also drive the second connecting rod 142 to move along the same trajectory.

[0068] In some embodiments, a cavity 151 is opened inside the mounting plate 15; the push rod 22 is installed inside the cavity 151, and the top rod 23 passes through the side wall of the mounting plate 15 and extends to the inside of the cavity 151; the movement trajectories of the push rod 22 and the top rod 23 are perpendicular; the push rod 22 and the top rod 23 are linked.

[0069] In this embodiment, a cavity 151 is provided inside the mounting plate 15, and the cavity 151 provides a movable space for the push rod 22; the push rod 22 and the push rod 23 are linked; when the push rod 22 moves in the horizontal direction, the push rod 22 squeezes the push rod 23, causing the push rod 23 to move in the vertical direction, so that one end of the mounting plate 15 can be lifted by the push rod 23, thereby releasing the clamping of the battery.

[0070] Specifically, the push rod 23 passes through the side wall of the mounting plate 15 and extends to its outside; and the movement trajectory between the push rod 23 and the push rod 22 is perpendicular, and the push rod 22 moves and can simultaneously push the push rod 23 to move; one end of the push rod 22 contacts the bottom of the push rod 23, and the contact end surface has at least one set of inclined surfaces, thereby ensuring that the push rod 22 moves in the horizontal direction while pushing the push rod 23 to move in the vertical direction.

[0071] As an optional embodiment, the pressure plate 21 also includes a buckle plate 211 arranged on one side thereof; a protrusion 152 is provided on the side wall of the mounting plate 15; the buckle plate 211 includes a card slot 2111 opened on its side wall, and a detour groove 2112 arranged at the bend of the buckle plate 211; the card slot 2111 is adapted to the protrusion 152; the inner wall of the card slot 2111 is in conflict with the outer wall of the protrusion 152, thereby achieving fixation between the pressure plate 21 and the mounting plate 15.

[0072] In this embodiment, one end of the pressure plate 21 is connected to a rotating shaft, and the rotating shaft can rotate along the axial hole opened inside the mounting plate 15; when the pressure plate 21 is flipped to a state parallel to the bottom surface of the mounting plate 15, the battery pack can be pressed and fixed on the inner side of the mounting plate 15 through the pressure plate 21.

[0073] Furthermore, in order to ensure that the position between the pressure plate 21 and the mounting plate 15 is fixed; the side wall of the pressure plate 21 extends outward and is connected to a buckle plate 211; the buckle plate 211 is an L-shaped structure, and a card slot 2111 is provided on the inner wall of the buckle plate 211, and the card slot 2111 is adapted to the protrusion 152 provided on the side wall of the mounting plate 15; through the cooperation between the card slot 2111 and the protrusion 152, the position between the mounting plate 15 and the pressure plate 21 is fixed.

[0074] Specifically, a detour groove 2112 is provided at the bending position of the buckle plate 211; when moving toward the protrusion 152, the end of the buckle plate 211 first collides with the outer wall of the protrusion 152, and is squeezed by the outer wall of the protrusion 152, causing the buckle plate 211 to deform along the detour groove 2112, thereby allowing the buckle plate 211 to continue to move downward; when the position of the slot 2111 corresponds to the position of the protrusion 152, the buckle plate 211 is no longer squeezed by the outer wall of the protrusion 152, and the detour groove 2112 returns to its original state; through the cooperation between the slot 2111 and the protrusion 152, the fixation between the pressure plate 21 and the mounting plate 15 is achieved.

[0075] In one embodiment provided in the present application, the push rod 22 includes a horizontal portion 221 and a bent portion 222, and the push rod 22 is a "Z"-shaped structure; the surface where the horizontal portion 221 contacts the push rod 23 is an inclined surface; the bent portion 222 passes through the cavity 151 and extends to its outside.

[0076] In this embodiment, the horizontal portion 221 of the push rod 22 is located near the upper position inside the cavity 151, and the end of the horizontal portion 221 conflicts with the bottom of the push rod 23; during the movement of the horizontal portion 221 in the horizontal direction, it pushes the push rod 22 to move so as to lift the push rod 23, and then lifts the pressure plate 21 through the push rod 23, thereby releasing the fixation between the pressure plate 21 and the mounting plate 15.

[0077] Furthermore, the end of the horizontal portion 221 away from the top rod 23 is connected to a bending portion 222 of an L-shaped structure, and the bending portion 222 passes through the side wall of the mounting plate 15 and extends to its outside; the setting of the bending portion 222 enables the staff to push the horizontal portion 221 from the outside to move in a straight line direction.

[0078] Specifically, the end of the horizontal portion 221 is an inclined slope structure; the horizontal portion 221 conflicts with the bottom of the top rod 23; the horizontal portion 221 moves in a linear direction while being able to push the top rod 23 to move in a vertical direction; the top rod 23 moves in a vertical direction to lift one end of the pressure plate 21, thereby releasing the limit on the battery pack from the outside.

[0079] In some embodiments, the guide groove 111 also includes a parallel portion 1112 connected to the inclined portion 1111; the first connecting rod 141 is adapted to the parallel portion 1112; the first connecting rod 141 moves along the inner wall of the parallel portion 1112, thereby realizing horizontal movement of the mounting plate 15 with the movable block 13.

[0080] In this embodiment, the inclined portion 1111 is connected to the parallel portion 1112; when the first connecting rod 141 moves a certain distance along the inclined portion 1111, the second connecting rod 142 can be flipped along the axial direction of the shaft hole 131; and then when the first connecting rod 141 moves to the inside of the parallel portion 1112, the movement trajectory of the first connecting rod 141 is parallel to the movement trajectory of the movable block 13; thereby, the movement of the rotating rod 14 drives the mounting plate 15 to move in the horizontal direction.

[0081] Specifically, the inclined portion 1111 is connected to the parallel portion 1112, so that the first connecting rod 141 moves along the inside of the inclined portion 1111 to the inside of the parallel portion 1112 in a continuous movement process; after the mounting plate 15 flips one hundred and eighty degrees, the first connecting rod 141 moves to the inside of the parallel portion 1112, and then the mounting plate 15 performs a linear reciprocating motion with the movable block 13.

[0082] As an optional embodiment, the top of the push rod 23 conflicts with the mounting plate 15; one end of the reset member 24 is connected to the push rod 22, and the other end thereof conflicts with the inner wall of the cavity 151; the movement of the movable block 13 can drive the bending portion 222 to conflict with the side wall of the bottom plate 11, thereby enabling the push rod 23 to lift one end of the pressure plate 21.

[0083] It should be noted that the bending portion 222 moves along the straight direction with the mounting plate 15, and the bending portion 222 contacts the inner wall of the base plate 11 during the movement; when the mounting plate 15 gradually approaches the side wall of the base plate 11, the push rod 22 is limited by the side wall of the base plate 11, so that the push rod 22 moves along the straight direction, and the push rod 22 moves while pushing the push rod 23 to move; thereby, the push rod 23 can lift the end of the pressure plate 21.

[0084] As an optional embodiment, the welding unit 3 includes a workbench 31, a conversion assembly 32 installed on the surface of the workbench 31, a welding head 33 arranged at the end of the conversion assembly 32, and a welding seat 34 adapted to the welding head 33; the number of conversion assemblies 32 is two groups, and the two groups of conversion assemblies 32 are symmetrically arranged on the surface of the workbench 31; the base plate 11 is installed on the surface of the workbench 31, and the base plate 11 is arranged on one side of the welding seat 34.

[0085] In this embodiment, the workbench 31 is provided to mainly support the conversion component 32; the workbench 31 can provide a suitable height for the staff, thereby making it easier for the staff to work; 32 mainly includes a transducer and an amplifier; the transducer is a key component that converts electrical energy into mechanical vibration, namely ultrasonic vibration; it contains piezoelectric ceramic materials, and when a high-frequency AC voltage is applied, these materials will deform and generate vibrations; the amplifier is located between the transducer and the welding head, and is used to adjust the amplitude, and sometimes it can amplify or reduce the vibration amplitude transmitted from the transducer to meet the needs of different welding tasks.

[0086] It should be noted that the welding head 33 adopts a stepped welding head, which can effectively adjust the amplitude by changing the cross-sectional size to form steps. The welding seat 34 is fixed to the surface of the workbench 31 by bolt connection; and the welding seat 34 cooperates with the welding head 33 to achieve welding between the battery pack and the tab.

[0087] Furthermore, there are two groups of conversion components 32, and the two groups of conversion components 32 are respectively for different processing positions, so as to ensure that after the processing of one side of the battery pack end is completed, the battery pack can be transferred to the next workstation for processing, thereby improving the efficiency of welding the battery pack tabs.

[0088] It should be noted that the base plate 11 is fixed to the surface of the workbench 31 by means of bolt connections, and the base plate 11 is mainly provided to support the movable block 13; the guide groove 111 opened at the bottom of the base plate 11 also provides a suitable trajectory for the movement of the first connecting rod 141, so that the first connecting rod 141 can move along the inner wall of the guide groove 111.

[0089] Specifically, the first connecting rod 141 cooperates with the guide groove 111, and the movable block 13 cooperates with the second connecting rod 142; thereby, when the movable block 13 moves in a straight line direction, it can drive the second connecting rod 142 to rotate along the axis of the shaft hole 131; the rotation of the second connecting rod 142 drives the mounting plate 15 to realize flipping in the horizontal direction.

[0090] During use, the staff places the battery pack on the inner side of the mounting plate 15, and then turns over the pressing plate 21, and uses the pressing plate 21 to move closer to the surface of the mounting plate 15; at this time, the buckle plate 211 is located on the side close to the staff, and the pressing plate 21 is pressed down at this time, so that the slot 2111 and the protrusion 152 are matched, thereby fixing the pressing plate 21 and the mounting plate 15; then the staff starts the welding device to weld one side of the end of the battery pack to the corresponding pole ear; after welding is completed, the pneumatic telescopic rod M is started, and its output end extends to push the movable block 13 to move As the movable block 13 moves, it drives the first connecting rod 141 to move along the inner track of the inclined portion 1111; as the rotating rod 14 moves, the second connecting rod 142 flips along the axis of the shaft hole 131; as the second connecting rod 142 flips, it drives the mounting plate 15 to flip 180 degrees; in the process of pushing the movable block 13 to move, the first connecting rod 141 moves to the end position of the inclined portion 1111, and the mounting plate 15 flips 180 degrees; as the mounting plate 15 flips, the other side of the end of the battery pack installed inside it moves to another processing position. Then the battery pack tabs can be welded; at this time, the buckle plate 211 has been rotated to the side close to the conversion assembly 32. At this time, the staff uses their hands to buckle the buckle plate 211; there is a blind spot in the field of view, which makes disassembly inconvenient; after the welding is completed, the output end of the pneumatic telescopic rod M can be driven to push the movable block 13 to continue moving; at this time, the first connecting rod 141 slides along the inner wall of the parallel portion 1112; the first connecting rod 141 is parallel to the movement trajectory of the movable block 13; then, as the rotating rod 14 moves, the mounting plate 15 is driven to move, so that the internal arrangement of the mounting plate 15 The bent portion 222 is in conflict with the side wall of the bottom plate 11; as the mounting plate 15 continues to approach the side wall of the bottom plate 11, the bent portion 222 is limited by the side wall of the bottom plate 11, so that the movement directions of the bent portion 222 and the mounting plate 15 are opposite; the bent portion 222 drives the horizontal portion 221 to squeeze the push rod 23; after the push rod 23 is subjected to force, it moves in the vertical direction; the push rod 23 contacts the surface of the pressure plate 21; thereby lifting the pressure plate 21, separating the pressure plate 21 and the mounting plate 15, and then the battery pack can be taken out from the inside of the mounting plate 15.

[0091] In summary, by the linkage between the movable block and the rotating rod, the horizontal movement of the movable block drives the mounting plate installed on the top of the rotating rod to flip the moving angle, thereby realizing the adjustment of the processing position of the mounting plate; and then the processing position can be converted more quickly, thereby improving the welding efficiency of the battery pack and the tab.

[0092] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. An ultrasonic welding device for automotive lithium batteries, characterized by: include, A transposition unit (1) comprises a base plate (11), a guide rod (12) arranged on the inner side of the base plate (11), a movable block (13) arranged on the outer side of the guide rod (12), a rotating rod (14) passing through the inner side of the movable block (13), and a mounting plate (15) arranged on the end of the rotating rod (14); A guide groove (111) is provided at the bottom of the base plate (11), and the rotating rod (14) moves along the inner wall of the guide groove (111); The movable block (13) includes an axial hole (131) extending through its surface; The rotating rod (14) comprises a first connecting rod (141) and a second connecting rod (142), wherein the axis positions of the first connecting rod (141) and the second connecting rod (142) are staggered; The second connecting rod (142) is adapted to the shaft hole (131), and the second connecting rod (142) rotates along the axis of the shaft hole (131); The movable block (13) moves along the direction of the guide rod (12), thereby driving the rotating rod (14) to flip; The rotating rod (14) is connected to the mounting plate (15); The guide groove (111) comprises an inclined portion (1111), and the inclined portion (1111) is a bent structure with an obtuse angle; The movable block (13) moves in a horizontal direction, and the first connecting rod (141) moves along the inner wall of the inclined portion (1111), thereby achieving the flipping of the mounting plate (15) connected to the second connecting rod (142); A clamping unit (2) comprising a pressure plate (21) hinged to the mounting plate (15), a push rod (22) disposed on the inner side of the mounting plate (15), a push rod (23) in contact with the push rod (22), and a reset member (24) disposed on a side wall of the push rod (22); The push rod (22) comprises a horizontal portion (221) and a bent portion (222), and the push rod (22) is a "Z"-shaped structure; The surface where the horizontal portion (221) contacts the top rod (23) is an inclined surface; The top of the push rod (23) is in conflict with the mounting plate (15); The movement of the movable block (13) can drive the bending portion (222) to come into contact with the side wall of the bottom plate (11), thereby enabling the push rod (23) to lift one end of the pressure plate (21); The guide groove (111) further includes a parallel portion (1112) connected to the inclined portion (1111); The first connecting rod (141) is adapted to the parallel portion (1112); The first connecting rod (141) moves along the inner wall of the parallel portion (1112), thereby enabling the mounting plate (15) to move horizontally along with the movable block (13); A welding unit (3) comprising a workbench (31), a conversion assembly (32) mounted on the surface of the workbench (31), a welding head (33) disposed at the end of the conversion assembly (32), and a welding seat (34) adapted to the welding head (33); The number of the conversion components (32) is two groups, and the two groups of the conversion components (32) are symmetrically arranged on the surface of the workbench (31); The bottom plate (11) is mounted on the surface of the workbench (31), and the bottom plate (11) is arranged on one side of the welding seat (34).

2. The ultrasonic welding device for automotive lithium batteries according to claim 1, characterized in that: A cavity (151) is provided inside the mounting plate (15); The push rod (22) is installed inside the cavity (151), and the push rod (23) passes through the side wall of the mounting plate (15) and extends to the inside of the cavity (151); The push rod (22) and the push rod (23) have motion trajectories that are perpendicular to each other; the push rod (22) and the push rod (23) are linked to each other.

3. The ultrasonic welding device for automotive lithium batteries according to claim 2, characterized in that: The pressing plate (21) further includes a gusset plate (211) provided on one side thereof; The side wall of the mounting plate (15) is provided with a protrusion (152); The gusset plate (211) comprises a clamping groove (2111) provided on a side wall thereof, and a detour groove (2112) provided at a bend of the gusset plate (211); The slot (2111) is adapted to the protrusion (152); The inner wall of the slot (2111) contacts the outer wall of the protrusion (152), thereby achieving fixation between the pressing plate (21) and the mounting plate (15).

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