Battery welding equipment

Abstract

The utility model relates to the technical field of welding equipment, and particularly discloses battery welding equipment which comprises a supporting mechanism, a positioning mechanism, a pressing mechanism and a welding mechanism, the supporting mechanism comprises a rack and a supporting piece, the supporting piece is arranged on the rack in a lifting mode and used for bearing a battery, the positioning mechanism is movably arranged on the rack, and the pressing mechanism is used for pressing the battery. The visual detection unit is used for identifying the horizontal positions of the tabs and the collecting pieces, the height detection unit is used for measuring the heights of the tabs and the collecting pieces, and after the visual detection unit and the height detection unit detect information of the tabs and the collecting pieces, the position information can be fed back to the pressing mechanism and the welding mechanism; therefore, accurate clamping and welding of the to-be-welded workpiece can be controlled, full-automatic welding of the battery cell tab and the collecting piece is achieved, and the welding efficiency and quality are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of battery packs, and specifically to a battery welding device. Background Technology

[0002] As the new energy vehicle industry becomes an important pillar for boosting the national economy, the demand for new energy vehicles at home and abroad has exploded, which has driven the demand for battery packs for new energy vehicles to gradually expand. A battery pack includes a housing and multiple cells. Multiple cells are stacked sequentially in the housing to form a cell module. Multiple cells in the same cell module need to be connected in series, and the tabs between any two adjacent cells need to be welded together. In order to collect information from the cells, a data acquisition chip needs to be configured on each cell. One end of the data acquisition chip is welded to the cell, and the other end is welded to the terminal block of the housing, thereby realizing the collection of multiple information such as voltage and temperature of multiple cells.

[0003] In existing technologies, because the welding of the tabs and the welding between the acquisition piece and the terminal block are not in the same position, the welding equipment cannot be precisely positioned. The only option is to first use the welding equipment to weld the tabs between multiple cells together, and then manually weld the acquisition piece and the terminal block. Furthermore, it cannot achieve welding at multiple angles, and its welding quality and efficiency are relatively low, which is not conducive to the large-scale production of lithium batteries. Since the shape of the terminal block is not necessarily completely consistent, the welding angle needs to be slightly adjusted during the welding process between the acquisition piece and the terminal block. However, the existing clamping mechanisms can only achieve clamping at a specific angle and cannot meet the needs of multi-angle welding. Utility Model Content

[0004] This utility model addresses the aforementioned problems and aims to provide a battery welding device. Through the detection component, it can improve positioning accuracy and welding accuracy, enable two welding operations to be performed through the same welding mechanism, improve welding quality and efficiency, and enable multi-angle welding.

[0005] To achieve the above objectives, this utility model provides a battery welding device. The battery pack includes a housing, multiple battery cells stacked inside the housing, and a collection plate. The housing is provided with a terminal block, and each battery cell has a tab. One end of the collection plate is connected to the battery cell. The welding device includes:

[0006] The support mechanism includes a frame and a support member, wherein the support member is vertically and flexibly mounted on the frame and can be used to support the battery pack;

[0007] The positioning mechanism, which is movably mounted on the frame, includes a visual detection unit for identifying the horizontal position of the electrode tab and the acquisition piece, and a height detection unit for measuring the height of the electrode tab and the acquisition piece;

[0008] A clamping mechanism is electrically connected to the vision detection unit. The clamping mechanism includes a first clamping component and a second clamping component movably disposed on the frame. The first clamping component is used to position and clamp two adjacent electrodes, and the second clamping component is used to clamp the acquisition piece onto the terminal block.

[0009] The welding mechanism is electrically connected to the vision detection unit and the height detection unit. The welding mechanism includes a robotic arm and a welding execution unit. The welding execution unit is movably mounted on one side of the frame via the robotic arm and is used to weld the positioned electrode tabs and acquisition pieces.

[0010] According to the battery welding equipment described above, the support mechanism further includes a first translation component and a second translation component. The first translation component includes a first slide, which is slidably disposed on the top of the frame and can move along the width direction of the frame. The second translation component includes a second slide, which is slidably disposed on the top of the first slide and can move along the length direction of the frame.

[0011] Both the positioning mechanism and the clamping mechanism are fixed on the second slide.

[0012] According to the battery welding equipment described above, the second clamping assembly includes a first lifting motor, a first fixing plate, a first clamping cylinder, and a clamping claw. The first fixing plate is fixed to the second slide in a way that allows it to be lifted and lowered by the first lifting motor. The first clamping cylinder is inclinedly arranged on the first fixing plate, and the clamping claw is connected to the output end of the first clamping cylinder.

[0013] According to the battery welding equipment described above, the tilt angle of the first clamping cylinder is between 40° and 50°.

[0014] According to the battery welding equipment described above, the second clamping assembly further includes an elastic adjustment unit, a first connecting plate is provided on the output end of the first clamping cylinder, and a first mounting plate is provided on the clamping claw. The first mounting plate can be connected to the first connecting plate through the elastic adjustment unit.

[0015] According to the battery welding equipment described above, the second clamping assembly further includes a second mounting plate and a first lifting screw. The second mounting plate is fixed on the second slide, and a slider seat is provided on the second mounting plate. The upper end of the first lifting screw is connected to the output shaft of the first lifting motor through a coupling. A second connecting plate is provided on the lower end of the first lifting screw, and the middle part of the first lifting screw passes through the slider seat and is threadedly engaged with the slider seat. The first fixing plate is fixed to the bottom of the second connecting plate.

[0016] According to the battery welding equipment described above, the second clamping assembly further includes a third mounting plate and a guide rod. The third mounting plate is located directly above the second mounting plate. The first lifting motor is fixed to the top of the third mounting plate. The guide rod is located between the third mounting plate and the second connecting plate, and the guide rod passes through the second mounting plate.

[0017] According to the battery welding equipment described above, the vision inspection unit is a CCD system, the height detection unit is a rangefinder, and both the CCD system and the rangefinder are fixed on the second carriage.

[0018] According to the battery welding equipment described above, the support mechanism further includes a second lifting motor and a second lifting screw. The support is configured as a lifting frame. The upper and lower ends of the second lifting screw are respectively connected to the top and bottom ends of the frame. The second lifting motor is connected to the second lifting screw. The side of the lifting frame is threadedly connected to the second lifting screw through a connecting seat.

[0019] According to the battery welding equipment described above, the welding mechanism further includes a base, the welding execution unit is a galvanometer, the bottom end of the robotic arm is fixed on the base, and the galvanometer is connected to the upper end of the robotic arm through a connecting flange.

[0020] This utility model has the following beneficial effects:

[0021] 1. The CCD system and rangefinder can accurately position the electrode tabs and data acquisition plates, and can feed back the position information to the clamping mechanism and welding mechanism, thereby controlling the precise clamping and welding of the workpiece to be welded, realizing fully automatic welding of the battery cell electrode tabs and data acquisition plates, and improving welding efficiency and quality.

[0022] 2. The tilt angle of the first clamping cylinder is between 40° and 50°, which conforms to the welding angle between the acquisition piece and the terminal block. Since the clamping claw is elastically connected to the first clamping cylinder, the tilt angle of the clamping claw can also change when the welding angle between the acquisition piece and the terminal block changes, which can effectively improve the welding angle and meet the needs of multi-angle welding.

[0023] 3. The lifting frame can reciprocate on the machine frame, so after welding the tabs and the sampling plate of a battery cell, it can be lowered to a certain position for manual feeding, and then raised to the preset height for clamping, positioning and welding. Its lifting action can realize the sequential welding and assembly of multiple battery cells without having to remove the clamping and positioning mechanisms for feeding each time, which can improve assembly efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the embodiment;

[0025] Figure 2 This is a schematic diagram of the welding mechanism structure in an embodiment;

[0026] Figure 3 This is a schematic diagram of the assembly structure of the positioning mechanism and the clamping mechanism in the embodiment;

[0027] Figure 4 This is a schematic diagram of the second clamping component structure in the embodiment.

[0028] In the picture:

[0029] 1. Support mechanism; 11. Frame; 12. Lifting frame; 13. First slide; 14. Second slide; 15. Second lifting motor; 16. Second lifting screw;

[0030] 2. Positioning mechanism; 21. CCD system; 22. Rangefinder;

[0031] 3. Clamping mechanism; 31. First clamping assembly; 32. Second clamping assembly; 321. First lifting motor; 322. First fixing plate; 323. First clamping cylinder; 323a. First connecting plate; 324. Clamping claw; 324a. First mounting plate; 325. Second mounting plate; 326. First lifting screw; 327. Second connecting plate; 328. Third mounting plate; 329. Guide rod;

[0032] 4. Welding mechanism; 41. Robotic arm; 42. Galvanometer; 43. Base; 44. Connecting flange. Detailed Implementation

[0033] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0034] like Figure 1-4 As shown, a battery welding device includes a support mechanism 1, a positioning mechanism 2, a clamping mechanism 3, and a welding mechanism 4.

[0035] In this embodiment, the battery pack includes a housing, multiple battery cells stacked inside the housing, and a data acquisition plate. The housing is provided with a terminal block, and the battery cells are provided with tabs. One end of the data acquisition plate is connected to the battery cell. The welding equipment is used to weld the tabs of two adjacent battery cells together and to weld multiple data acquisition plates to the terminal block in sequence.

[0036] The support mechanism 1 includes a frame 11 and a support member. The frame 11 provides support for the positioning mechanism 2 and the pressing mechanism 3. The support member is elliptical and can be mounted on the frame 11 to support the battery pack. In this embodiment, the frame 11 is provided with a loading station and a welding station. The support member can drive the battery pack to switch freely between the loading station and the welding station. That is, initially, two cells stacked vertically can be placed in the box. The welding mechanism 4 is used to weld the tabs of the two cells together and weld the acquisition piece to the terminal block. Then, the support member drives the box and the cells in the box to descend to the loading station. Then, one cell is manually loaded and then it rises to the welding station. The above steps are repeated to realize the welding and assembly of all cell tabs and acquisition pieces.

[0037] Specifically, the positioning mechanism 2 is movably mounted on the frame 11. It includes a vision detection unit for identifying the horizontal position of the electrode tab and the data acquisition chip, and a height detection unit for measuring the height of the electrode tab and the data acquisition chip. The clamping mechanism 3 is electrically connected to the vision detection unit. The clamping mechanism 3 includes a first clamping component 31 and a second clamping component 32 movably mounted on the frame 11. The first clamping component 31 is used to position and clamp two adjacent electrodes. After obtaining the horizontal position of the electrode tab, it can move to directly above the electrode tab and then move downwards to clamp the electrode tab. Similarly, the second clamping component... After obtaining the horizontal position of the battery cell acquisition piece, 32 moves to directly above the acquisition piece and then moves downward to press the acquisition piece onto the terminal block. After pressing and positioning, the horizontal position of the electrode tab and the acquisition piece will not change. At this time, the height detection unit can still obtain the height information of the electrode tab and the acquisition piece after pressing, and then transmit it to the welding mechanism 4. The welding mechanism 4 is electrically connected to the vision detection unit and the height detection unit. After obtaining the horizontal position and height information, the welding mechanism 4 can achieve precise welding. In particular, after obtaining the height information, it can avoid the occurrence of phenomena such as cold solder joints and improve the welding quality.

[0038] In this embodiment, the welding mechanism 4 includes a robotic arm 41 and a welding execution unit. The welding execution unit is movably mounted on one side of the frame 11 via the robotic arm 41. The robotic arm 41 can drive the welding execution unit to move in multiple dimensions. That is, the welding execution unit can perform welding actions on the battery cell tabs and the battery cell acquisition piece at two locations respectively, for welding the positioned tabs and acquisition pieces, welding the tabs of two adjacent battery cells together, and welding the battery cell acquisition piece to the terminal block.

[0039] Specifically, the welding mechanism 4 also includes a base 43, a welding execution unit is a galvanometer 42, the bottom end of the robotic arm 41 is fixed on the base 43, and the galvanometer 42 is connected to the upper end of the robotic arm 41 through a connecting flange 44. The robotic arm 41 is used to drive the galvanometer 42 to move, and then the galvanometer 42 can emit laser light to realize laser welding.

[0040] To achieve the displacement of the positioning mechanism 2 and the clamping mechanism 3, the support mechanism 1 further includes a first translation component and a second translation component. The first translation component includes a first slide 13, which is slidably mounted on the top of the frame 11 and can move along the width direction of the frame 11. The second translation component includes a second slide 14, which is slidably mounted on the top of the first slide 13 and can move along the length direction of the frame 11. Both the positioning mechanism 2 and the clamping mechanism 3 are fixed on the second slide 14. When the frame 13 moves along the width direction of the frame 11, it can drive the second slide 14 and the positioning mechanism 2 and the clamping mechanism 3 located on the second slide 14 to move synchronously along the width direction of the frame 11. When the second slide 14 moves along the length direction of the frame 11, it can drive the positioning mechanism 2 and the clamping mechanism 3 to move synchronously along the length direction of the frame 11, thereby realizing the movement of the positioning mechanism 2 and the clamping mechanism 3 in the horizontal plane, which facilitates the adjustment of their positions, so as to detect the position information of the battery cell and clamp and fix the position of the battery cell's tab and the acquisition plate.

[0041] Specifically, in order to realize the movement of the first slide 13, a first guide rail, a first drive screw and a first translation motor can be arranged on the frame 11 along its width direction. Both ends of the first slide 13 are connected to the first guide rail through sliders and to the first drive screw through connecting seats. The two first drive screws are connected through a synchronization structure, and the first translation motor is connected to one of the first drive screws, thereby driving the two first drive screws to rotate synchronously and driving the two ends of the first slide 13 to translate synchronously.

[0042] Of course, the movement of the second carriage 14 also adopts a similar movement structure to that of the first carriage 13, which will not be repeated in this embodiment.

[0043] In this embodiment, multiple battery packs can be set on the support at the same time. Each battery pack is equipped with a corresponding positioning mechanism 2 and a clamping mechanism 3. Multiple battery packs can be welded sequentially by a welding mechanism 4, thereby improving processing efficiency.

[0044] Specifically, the second clamping assembly 32 includes a first lifting motor 321, a first fixing plate 322, a first clamping cylinder 323, and a clamping claw 324. The first fixing plate 322 is fixed to the second slide 14 by the first lifting motor 321. The first clamping cylinder 323 is inclinedly arranged on the first fixing plate 322. The clamping claw 324 is connected to the output end of the first clamping cylinder 323. The first lifting motor 321 can drive the first clamping cylinder 323 and the clamping claw 324 to move up and down through the first fixing plate 322, driving them to a position that connects with the top of the acquisition piece. Then, the first clamping cylinder 323 drives the clamping claw 324 to move obliquely, thereby clamping the acquisition piece. Its inclined clamping meets the welding requirements of the acquisition piece and the terminal block.

[0045] In this embodiment, the tilt angle of the first clamping cylinder 323 is between 40° and 50°, preferably 45°, that is, the clamping claw 324 clamps the collection piece in a 45° direction. Of course, its angle can also be selected from multiple angles such as 41° or 50°.

[0046] Specifically, considering the machining accuracy errors of the acquisition chip and terminal block, their clamping angle may not necessarily be directly maintained at 45°. Therefore, the second clamping assembly 32 also includes an elastic adjustment unit. The output end of the first clamping cylinder 323 is provided with a first connecting plate 323a, and the clamping claw 324 is provided with a first mounting plate 324a. The first mounting plate 324a can be connected to the first connecting plate 323a through the elastic adjustment unit. That is, one end of the elastic adjustment unit is fixedly connected to the first mounting plate 324a, and the other end is connected to the first connecting plate 323a, so that the first mounting plate 324a... When 24a rotates, its elastic adjustment unit applies an elastic limiting force to it. When the driving force is greater than the elastic limiting force, the elastic adjustment unit can be allowed to rotate. When there is a change in the welding angle between the acquisition piece and the terminal block, the acquisition piece will drive the pressure claw 324 to adjust its tilt angle. In this process, the elastic adjustment unit plays the role of allowing the pressure claw 324 to adjust, providing an elastic resistance for its adjustment. In this embodiment, the elastic adjustment unit is set as a spring. The spring can be used to increase the applicable angle of the pressure claw 324, improve the clamping accuracy, and realize multi-angle welding.

[0047] Specifically, the second clamping assembly 32 also includes a second mounting plate 325 and a first lifting screw 326. The second mounting plate 325 is fixed on the second slide 14, and a slider seat is provided on the second mounting plate 325. The slider seat is located at the bottom of the second mounting plate 325, and a threaded hole is provided on the slider seat. The internal thread in the threaded hole is adapted to the external thread on the first lifting screw 326. The upper end of the first lifting screw 326 is connected to the output shaft of the first lifting motor 321 through a coupling. A second connecting plate 327 is provided on the lower end of the first lifting screw 326, and the first... A lifting screw 326 is threaded through the middle of a slider seat and is threadedly engaged with the slider seat. A first fixing plate 322 is fixed to the bottom of a second connecting plate 327. A first lifting motor 321 drives the first lifting screw 326 to rotate. Since the first lifting screw 326 is threadedly engaged with the slider seat and the slider seat is fixed on the second mounting plate 325 and cannot move, the first lifting screw 326 itself will move up and down, thereby driving the second connecting plate 327 and the second fixing plate at its bottom to move up and down together, and at the same time driving the pressure claw 324 to move up and down synchronously.

[0048] Of course, the second clamping assembly 32 also includes a third mounting plate 328 and a guide rod 329. The third mounting plate 328 is located directly above the second mounting plate 325. The first lifting motor 321 is fixed to the top of the third mounting plate 328. The guide rod 329 is located between the third mounting plate 328 and the second connecting plate 327, and the middle part of the guide rod 329 passes through the second mounting plate 325. The first lifting motor 321 rises and falls together with the first lifting screw 326. The existence of the guide rod 329 is to guide the lifting and lowering movements of the first lifting motor 321 and the first lifting screw 326, ensuring the stability of their lifting and lowering movements, and thus ensuring the clamping accuracy of the clamping claw 324.

[0049] Of course, in this embodiment, the first pressing component 31 includes a second pressing cylinder and a pressing block. The second pressing cylinder is fixed on the second slide 14, and it can drive the pressing block to descend to press the electrode tab.

[0050] Specifically, the visual detection unit is set as a CCD system 21, and the height detection unit is set as a rangefinder 22. Both the CCD system 21 and the rangefinder 22 are fixed on the second slide 14. The CCD system 21 is used to capture a planar view of the entire battery cell, thereby determining the position of the battery cell tabs and the acquisition chip. The rangefinder 22 is used to measure the height of the tabs and the acquisition chip. Both can be displaced in the plane with the second slide 14, and the measurement position can be adjusted to ensure measurement accuracy.

[0051] In this embodiment, the acquisition piece is preferably a nickel sheet, which has good electrical conductivity, and the use of a nickel sheet can ensure the strong welding of it to the battery cell and terminal block.

[0052] In this embodiment, the support mechanism 1 further includes a second lifting motor 15 and a second lifting screw 16. The support member is a lifting frame 12. The upper and lower ends of the second lifting screw 16 are respectively connected to the top and bottom ends of the frame 11. The second lifting motor 15 is connected to the second lifting screw 16. The side of the lifting frame 12 is threadedly connected to the second lifting screw 16 through a connecting seat. When the second lifting motor 15 is working, it can drive the second lifting screw 16 to rotate, and the rotation of the second lifting screw 16 drives the lifting frame 12 to perform lifting and lowering movements.

[0053] The technical solution of this utility model has been described in detail above with reference to the accompanying drawings. The described embodiments are used to help understand the concept of this utility model. The specific embodiments described herein are merely illustrative examples of the spirit of this utility model. Those skilled in the art to which this utility model pertains can make various modifications or additions to the described specific embodiments or use similar methods to replace them, but without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0054] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0055] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0057] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A battery welding device, the battery comprising a box, a plurality of battery cells stacked in the box, and a tab collector, the box being provided with a terminal row, the battery cell being provided with a tab, and one end of the tab collector being connected to the battery cell, characterized in that, The welding equipment includes: The support mechanism includes a frame and a support member, wherein the support member is vertically and flexibly mounted on the frame and can be used to support the battery pack; The positioning mechanism, which is movably mounted on the frame, includes a visual detection unit for identifying the horizontal position of the electrode and the acquisition piece, and a height detection unit for measuring the height of the electrode and the acquisition piece; A clamping mechanism is electrically connected to the vision detection unit. The clamping mechanism includes a first clamping component and a second clamping component movably mounted on the frame. The first clamping component is used to position and clamp two adjacent electrodes, and the second clamping component is used to clamp the acquisition piece onto the terminal block. The welding mechanism is electrically connected to the vision detection unit and the height detection unit. The welding mechanism includes a robotic arm and a welding execution unit. The welding execution unit is movably mounted on one side of the frame via the robotic arm and is used to weld the positioned electrode tabs and acquisition pieces.

2. A battery welding apparatus as defined in claim 1, wherein The support mechanism further includes a first translation component and a second translation component. The first translation component includes a first slide, which is slidably disposed on the top of the frame and can move along the width direction of the frame. The second translation component includes a second slide, which is slidably disposed on the top of the first slide and can move along the length direction of the frame. Both the positioning mechanism and the clamping mechanism are fixed on the second slide.

3. A battery welding apparatus as defined in claim 2, wherein, The second clamping assembly includes a first lifting motor, a first fixing plate, a first clamping cylinder, and a clamping claw. The first fixing plate is fixed to the second slide in a height-adjustable manner by the first lifting motor. The first clamping cylinder is inclinedly arranged on the first fixing plate, and the clamping claw is connected to the output end of the first clamping cylinder.

4. A battery welding apparatus as defined in claim 3, wherein The tilt angle of the first clamping cylinder is between 40° and 50°.

5. The battery welding apparatus of claim 3, wherein, The second clamping assembly further includes an elastic adjustment unit. A first connecting plate is provided on the output end of the first clamping cylinder, and a first mounting plate is provided on the clamping claw. The first mounting plate can be connected to the first connecting plate through the elastic adjustment unit.

6. The battery welding apparatus of claim 3, wherein, The second clamping assembly further includes a second mounting plate and a first lifting screw. The second mounting plate is fixed on the second slide and has a slider seat. The upper end of the first lifting screw is connected to the output shaft of the first lifting motor via a coupling. The lower end of the first lifting screw has a second connecting plate, and the middle part of the first lifting screw passes through the slider seat and is threadedly engaged with the slider seat. The first fixing plate is fixed to the bottom of the second connecting plate.

7. A battery welding apparatus as defined in claim 6, wherein The second clamping assembly also includes a third mounting plate and a guide rod. The third mounting plate is located directly above the second mounting plate. The first lifting motor is fixed to the top of the third mounting plate. The guide rod is located between the third mounting plate and the second connecting plate, and the guide rod passes through the second mounting plate.

8. The battery welding apparatus of claim 2, wherein, The visual detection unit is a CCD system, and the height detection unit is a rangefinder. Both the CCD system and the rangefinder are fixed on the second carriage.

9. The battery welding equipment according to claim 1, characterized in that, The support mechanism also includes a second lifting motor and a second lifting screw. The support is configured as a lifting frame. The upper and lower ends of the second lifting screw are respectively connected to the top and bottom ends of the frame. The second lifting motor is connected to the second lifting screw. The side of the lifting frame is threadedly connected to the second lifting screw through a connecting seat.

10. The battery welding apparatus of claim 1, wherein, The welding mechanism also includes a base, the welding execution unit is a galvanometer, the bottom end of the robotic arm is fixed on the base, and the galvanometer is connected to the upper end of the robotic arm through a connecting flange.

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