Battery pack positive and negative electrode welding device

Abstract

The application discloses a battery pack positive and negative electrode welding device and relates to the technical field of tab welding. The device comprises a supporting table, an anvil mechanism and a rolling welding mechanism are arranged on the supporting table in a left-right distribution, the rolling welding mechanism is used for welding the positive and negative electrodes of a battery and an ultralong tab, and a rolling mechanism is arranged on the rolling welding mechanism and the anvil mechanism. The device has the advantages that the anvil mechanism and the rolling mechanism are matched, the rolling and flattening from the top and the bottom are realized, the contact gap between the current collector and the ultralong tab is reduced, the phenomenon of virtual welding is prevented, the welding quality is improved, the force from the top and the bottom is more uniform, the tab breakage is avoided, the lower supporting assembly and the lifting plate are matched, the air cooling and the anti-adhesion and material stripping are used, the tab after welding is separated from the anvil table, the deformation and tearing caused by manual intervention are avoided, the welding quality is improved, and the waste rate is reduced.

Description

Technical Field

[0001] This invention relates to the field of electrode welding technology, and more particularly to a battery pack positive and negative electrode welding device. Background Technology

[0002] The tabs are key conductive components that connect the positive and negative terminals of a battery pack to external circuits. They are usually made of metal foil (such as nickel, aluminum, and copper). One end is welded to the battery current collector (positive aluminum foil / negative copper foil), and the other end is connected to the battery casing or external circuit. Currently, ultrasonic rolling welding is used for ultra-long tabs. High-frequency vibration friction generates heat to achieve solid-state bonding between metals. The ultra-long tabs are fixed on the anvil by a clamp, and continuous welding is achieved by applying pressure through a vibrating disc-shaped welding head in a rolling manner.

[0003] Currently, during the rolling welding process for extra-long tabs, a gap exists between the long tab and the positive and negative electrodes of the battery during welding. This gap can lead to incomplete welds, affecting welding quality. Common methods to prevent excessive gaps include adjusting the welding head pressure or performing a single-stage pressing process. However, because the tabs are relatively soft and thin, adjusting the welding head pressure is difficult. Furthermore, with the single-stage pressing method, the tabs in later weld stages still experience gaps due to welding stress. Secondly, if the welding head pressure exceeds the tab's tolerance limit, it can cause severe tab breakage. The pressure welding and localized high temperatures during welding can cause the tab to easily adhere to the anvil surface, requiring manual removal. This poses a risk of deformation and tearing, further affecting welding quality and increasing the scrap rate.

[0004] Therefore, in order to improve welding quality and reduce scrap rate, this invention provides a battery pack positive and negative electrode welding device. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing a battery pack positive and negative electrode welding device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A battery pack positive and negative electrode welding device includes a support platform, on which an anvil mechanism and a rolling welding mechanism are arranged in a left-right distribution. The rolling welding mechanism is used to weld the positive and negative electrodes of the battery to extra-long tabs, and a rolling mechanism is also provided.

[0008] The anvil mechanism includes a feeding assembly mounted on a support platform. The feeding assembly is used for feeding and locking the left side of the extra-long tab. A lower support assembly is mounted on the support platform and the feeding assembly. The lower support assembly is used to support and smooth the lower part of the extra-long tab. A lifting plate is mounted on the support platform. The bottom wall of the lifting plate and the top wall of the support platform are connected by an electric push rod. The lifting plate is driven to move up and down through the output end of the electric push rod. The lower support assembly and the lifting plate cooperate to perform air cooling and anti-adhesion material removal operations.

[0009] The rolling mechanism includes an inverted U-shaped slide that is driven to slide left and right by an electric slider and is connected to the top wall of the support platform. The inverted U-shaped slide is equipped with a rolling component. The rolling component is used to cooperate with the lower support component to simultaneously roll the extra-long tab over a large area from both the top and bottom directions, and is partially released when the rolling welding mechanism is welding.

[0010] In the aforementioned battery pack positive and negative electrode welding equipment, the support platform is L-shaped, and the top wall of the vertical section of the support platform is provided with a front-to-back oriented slide rail. The rolling welding mechanism reciprocates on the slide rail by being driven by an electric slider, and the rolling welding mechanism performs ultrasonic rolling welding operations through a disc-shaped rolling welding head.

[0011] In the aforementioned battery pack positive and negative electrode welding equipment, the feeding assembly includes a feeding platform, and the feeding platform is detachably installed on the top wall of the horizontal section of the support platform. The feeding platform consists of a concave seat fixed to the support platform and a support bar fixed to the left side of the top wall of the concave seat. Ear seats are fixed on the front and rear side walls of the concave seat. A clamping plate is snapped onto the top of the support bar by a U-shaped lower pressure frame. The lower pressure frame and the ear seats are connected by pins.

[0012] In the aforementioned battery pack positive and negative electrode welding equipment, the lower support assembly includes a support boss, and the support boss is slidably connected to the concave base from left to right. Inside the support boss, a long pad and an anvil are slidably connected from top to bottom. The anvil and the long pad are stacked on top of each other. The top wall of the anvil is at the same height as the top wall of the support boss, and the bottom wall of the long pad is at the same height as the bottom wall of the support boss.

[0013] In the aforementioned battery pack positive and negative electrode welding equipment, the interior of the support boss is symmetrically provided with air guiding channels on both sides with the anvil as the center. The air guiding channels are composed of a main channel facing forward and backward and branch channels that are evenly connected on the main channel. The top of the branch channels is inclined close to the anvil.

[0014] In the aforementioned battery pack positive and negative electrode welding equipment, a lifting plate is slidably connected to the right side wall of the concave base and the left side wall of the vertical section of the support platform. The initial top wall height of the lifting plate is consistent with the top wall height of the concave base and the top wall height of the vertical section of the support platform.

[0015] In the aforementioned battery pack positive and negative electrode welding equipment, a locking component is provided together with the rolling welding mechanism and the support platform. The locking component includes a long plate, and the front side wall of the rolling welding mechanism is fixed with a long plate that is slidably connected to the top wall of the vertical section of the support platform. A telescopic rod is installed on the front part of the left side wall of the long plate, and a locking rod is fixedly connected to the rear side wall of the telescopic end of the telescopic rod.

[0016] In the aforementioned battery pack positive and negative electrode welding equipment, the right side wall of the vertical section of the inverted U-shaped slide is fixedly connected to the front and rear side walls of the support boss by an L-shaped rod. The rolling assembly includes a connecting frame fixed to the right side wall of the horizontal section of the inverted U-shaped slide. Multiple connecting rods with a front-rear orientation are evenly distributed on the right side wall of the connecting frame, and double-headed torsion spring rods are connected between adjacent connecting rods.

[0017] In the aforementioned battery pack positive and negative electrode welding equipment, a rolling component is fixedly connected to the movable section of the double-headed torsion spring rod. The rolling component consists of a support plate connected to the double-headed torsion spring rod and a rolling roller rotatably connected to the side of the support plate away from the double-headed torsion spring rod. The rolling roller and the support plate are both provided with a front-to-back through positioning hole in the middle, and the positioning hole is adapted to the locking rod.

[0018] The aforementioned battery pack positive and negative electrode welding equipment also includes a reset assembly. The reset assembly includes connecting plates, with connecting plates rotatably connected to the frontmost and rearmost connecting rods. A baffle is rotatably connected between the two connecting plates. A motor is installed on the rear side wall of the front vertical section of the inverted U-shaped carriage, and the rear side wall of the motor's output end is connected to the front connecting plate.

[0019] Compared with existing technologies, the advantages of this invention are:

[0020] 1. By cooperating with the anvil and rolling mechanism, the gap between the current collector and the extra-long tab is reduced through large-area rolling from above and smoothing from below, preventing the phenomenon of incomplete welding, improving the welding quality, and the force is more evenly distributed from both the top and bottom directions, avoiding the occurrence of tab breakage; multiple rolling rollers connected in series by locking rods synchronously roll to the right in a large area, and the support boss moves to the right and cooperates with the locking rod to smooth the bottom wall of the part to be welded in a large area.

[0021] 2. As the locking rod releases its restriction, multiple rolling parts change from a single, connected assembly to individual units. The pressure on the right end to be welded is released one by one. This release helps reduce the damage of welding stress to the electrode tabs. At the same time, the partial and gradual release, compared to releasing the entire assembly at once, helps prevent the electrode tabs in the later stages of welding from still having gaps in their application.

[0022] 3. By combining the lower support assembly and the lifting plate, and utilizing both air cooling and anti-adhesion material removal methods, the welded electrode tabs are easily separated from the anvil, avoiding deformation and tearing caused by manual intervention, thus improving welding quality and reducing scrap rate. The airflow is evenly blown through the branch channel to the bottom wall of the electrode tab and the top wall of the anvil, quickly cooling and preventing the electrode tab from sticking to the anvil. At the same time, the electric push rod drives the lifting plate to slide downward, and the anvil loses its bottom support and slides down to separate from the electrode tab. Attached Figure Description

[0023] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

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

[0025] Figure 2 This is a schematic diagram of the rolling welding mechanism and locking assembly.

[0026] Figure 3 This is a partial structural diagram of the compaction mechanism.

[0027] Figure 4 This is a partial structural diagram of the anvil mechanism.

[0028] Figure 5 This is a partial structural exploded view of the anvil mechanism.

[0029] Figure 6 A schematic diagram showing the change in the movement of the support boss and the rolling element to the right.

[0030] Figure 7 This is a partial cross-sectional view of the compaction assembly.

[0031] Figure 8 This is a schematic diagram showing the changes in the forward movement of the rolling welding mechanism and the locking lever.

[0032] Figure 9 This is a schematic diagram showing the downward movement of the lifting platform.

[0033] In the diagram: 1. Support platform; 2. Rolling welding mechanism; 3. Anvil mechanism; 31. Feeding assembly; 311. Feeding platform; 312. Clamping plate; 313. Lower pressure frame; 32. Lower support assembly; 321. Support boss; 322. Long pad; 323. Anvil platform; 324. Air guide channel; 33. Lifting plate; 4. Rolling mechanism; 41. Locking assembly; 411. Long plate; 412. Telescopic rod; 413. Locking rod; 42. Inverted U-shaped slide; 43. Rolling assembly; 431. Connecting frame; 432. Connecting rod; 433. Rolling component; 44. Reset assembly; 441. Motor; 442. Connecting plate; 443. Baffle. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Reference Figures 1 to 2 A battery pack positive and negative electrode welding device includes a support platform 1, on which an anvil mechanism 3 and a rolling welding mechanism 2 are arranged in a left-right distribution. The rolling welding mechanism 2 is used to weld the positive and negative electrodes of the battery to the extra-long electrode tabs, and a rolling mechanism 4 is also provided.

[0036] The support platform 1 is L-shaped, and the top wall of the vertical section of the support platform 1 is provided with a front-to-back sliding rail. The rolling welding mechanism 2 reciprocates on the sliding rail by being driven by an electric slider. The rolling welding mechanism 2 performs ultrasonic rolling welding operation through a disc-shaped rolling welding head.

[0037] Before welding, the current collectors of the positive and negative electrodes of the battery are overlapped with the extra-long tabs. The side away from the welding end is locked by the anvil mechanism 3. The anvil mechanism 3 and the rolling mechanism 4 work together to roll and smooth the part where the current collector overlaps with the extra-long tab from left to right and from top to bottom. After the welding part is flat, the rolling welding mechanism 2 moves from front to back to perform rolling welding. As the rolling welding mechanism 2 moves, the pressure of the rolling mechanism 4 on the welding part is released segment by segment. After welding is completed, the anvil mechanism 3 is used for air cooling and anti-adhesion material removal.

[0038] Reference Figure 1 , Figure 4 , Figure 5 and Figure 6 The anvil mechanism 3 includes a feeding assembly 31 mounted on the support platform 1. The feeding assembly 31 is used for feeding the extra-long electrode tab and locking the left side. A lower support assembly 32 is mounted on the support platform 1 and the feeding assembly 31. The lower support assembly 32 is used to support and smooth the lower part of the extra-long electrode tab. A lifting plate 33 is mounted on the support platform 1. The bottom wall of the lifting plate 33 and the top wall of the support platform 1 are connected by an electric push rod. The lifting plate 33 is driven to move up and down through the output end of the electric push rod. The lower support assembly 32 and the lifting plate 33 cooperate to perform air cooling and anti-adhesion material removal operations.

[0039] Reference Figures 4 to 5The feeding assembly 31 includes a feeding platform 311. The feeding platform 311 is detachably installed on the top wall of the horizontal section of the support platform 1. The feeding platform 311 consists of a concave seat fixed to the support platform 1 and a support bar fixed to the left side of the top wall of the concave seat. Ear seats are fixed on the front and rear side walls of the concave seat. A clamping plate 312 is snapped onto the top of the support bar through an inverted U-shaped pressing frame 313. The pressing frame 313 is connected to the ear seat by a pin.

[0040] Reference Figure 4 , Figure 5 and Figure 6 The lower support assembly 32 includes a support boss 321, which is slidably connected to the concave base. Inside the support boss 321, a long pad 322 and an anvil base 323 are slidably connected. The anvil base 323 and the long pad 322 are stacked on top of each other. The top wall of the anvil base 323 is at the same height as the top wall of the support boss 321, and the bottom wall of the long pad 322 is at the same height as the bottom wall of the support boss 321. Inside the support boss 321, air channels 324 are symmetrically opened on the left and right sides with the anvil base 323 as the center. The air channels 324 consist of a main channel (not shown in the figure) facing forward and backward and branch channels that are evenly connected on the main channel. The top of the branch channels is inclined and close to the anvil base 323.

[0041] Reference Figure 5 The right side wall of the concave base and the left side wall of the vertical section of the support platform 1 are slidably connected by a lifting plate 33. The initial top wall height of the lifting plate 33 is consistent with the top wall height of the concave base and the top wall height of the vertical section of the support platform 1.

[0042] Reference Figures 1 to 3 The rolling mechanism 4 includes an inverted U-shaped slide 42 that is connected to the top wall of the support platform 1 by being driven to slide left and right by an electric slider. A rolling component 43 is provided on the inverted U-shaped slide 42. The rolling component 43 is used to cooperate with the lower support component 32 to flatten the extra-long tabs from both the top and bottom directions at the same time, and to release them locally when the rolling welding mechanism 2 is welding.

[0043] Reference Figure 2 A locking assembly 41 is provided on both the rolling welding mechanism 2 and the support platform 1. The locking assembly 41 includes a long plate 411. The front side wall of the rolling welding mechanism 2 is fixed with a long plate 411 that is slidably connected to the top wall of the vertical section of the support platform 1. A telescopic rod 412 is installed on the front part of the left side wall of the long plate 411. A locking rod 413 is fixedly connected to the rear side wall of the telescopic end of the telescopic rod 412.

[0044] Reference Figure 1 , Figure 3 and Figure 7The right side wall of the vertical section of the inverted U-shaped slide 42 is fixedly connected to the front and rear side walls of the support boss 321 by an L-shaped rod. The rolling assembly 43 includes a connecting frame 431 fixed to the right side wall of the horizontal section of the inverted U-shaped slide 42. Multiple connecting rods 432 with a front-to-back orientation are evenly distributed on the right side wall of the connecting frame 431. A double-headed torsion spring rod is connected between adjacent connecting rods 432. A rolling component 433 is fixedly connected to the movable section of the double-headed torsion spring rod. The rolling component 433 consists of a support plate connected to the double-headed torsion spring rod and a rolling roller rotatably connected to the side of the support plate away from the double-headed torsion spring rod. The rolling roller and the support plate are both provided with a positioning hole that runs through the front and rear. The positioning hole is adapted to the locking rod 413.

[0045] Reference Figure 3 It also includes a reset assembly 44, which includes a connecting plate 442. The connecting rods 432 at the frontmost and rearmost sides are rotatably connected to the connecting plates 442. A baffle 443 is rotatably connected between the two connecting plates 442. A motor 441 is installed on the rear side wall of the front vertical section of the inverted U-shaped carriage 42. The rear side wall of the output end of the motor 441 is connected to the front connecting plate 442.

[0046] Before welding, the initial position of the rolling welding mechanism 2 is located at the rear of the slide rail on the support platform 1, the initial position of the inverted U-shaped slide 42 is to the left, and the initial state of the multiple rolling parts 433 is that multiple rolling rollers are connected in series through the locking rod 413 to form a whole. At this time, the double-headed torsion spring rod is in the state after being rotated under force. The initial position of the support boss 321 is located on the concave seat of the loading platform 311. The support boss 321 and the support bar of the loading platform 311 form a plane, providing lower support for the current collectors of the positive and negative electrodes of the battery and the extra-long tabs (such as...). Figure 6 (As shown in the image above).

[0047] When installing the current collectors and extra-long tabs of the positive and negative terminals of the battery, the lower pressure frame 313 assembles the clamping plate 312 above the loading platform 311 and the support boss 321. After the pin is inserted, the support bar and the clamping plate 312 press and clamp the left side of the overlapping part of the current collector and the extra-long tab.

[0048] The rolling element 433 and the supporting boss 321 move from left to right to perform the rolling operation (e.g.) Figure 6 As shown in the figure, the specific steps are as follows: The inverted U-shaped carriage 42 drives the rolling assembly 43 to move to the right, and the L-shaped rod drives the support boss 321 to move to the right synchronously. Multiple rolling rollers connected in series by the locking rod 413 move to the right synchronously to perform large-scale rolling. The support boss 321 moves to the right and cooperates with the locking rod 413 to smooth the bottom wall of the part to be welded over a large area, so as to reduce the bonding gap between the current collector and the extra-long electrode tab, prevent the phenomenon of incomplete welding, and improve the welding quality. The part to be welded is flattened from the top and bottom, and the force is more even, preventing the soft and thin long electrode tab from exceeding its bearing limit and avoiding the electrode tab from breaking.

[0049] When the inverted U-shaped carriage 42 moves the compaction assembly 43 to the right, the inverted U-shaped carriage 42 gradually moves closer to the long plate 411. The telescopic rod 412 can extend and retract to adapt to changes in the distance between the inverted U-shaped carriage 42 and the long plate 411. The locking rod 413 maintains the series connection of multiple compaction components 433. The compaction component 433 stops moving when it reaches the right end of the part to be welded, and pressure is maintained on the right end (e.g., Figure 3 (As shown).

[0050] It should be noted that the top wall height of the support boss 321 is slightly lower than the top wall height of the support strip of the loading table 311, so as to facilitate the movement of the support boss 321. The right side wall of the support boss 321 is chamfered. The part of the support boss 321, the rolling part 433 and the electrode tab that are in contact can be coated with a ceramic coating to reduce the pulling on the surface of the electrode tab.

[0051] During welding, the rolling welding mechanism 2 is driven by an electric slider to move from front to back to perform rolling welding operations. The disc-shaped welding head and the anvil 323 are vertically aligned. The disc-shaped welding head rolls and presses against the part to be welded located above the anvil 323 to achieve welding of the current collector and the extra-long tab.

[0052] During welding, the rolling welding mechanism 2 drives the long plate 411 to slide forward, and the locking rod 413 gradually pulls out of the positioning hole of the corresponding rolling part 433 (e.g., Figure 8 As shown, the rolling element 433, which is not restricted by the locking rod 413, is driven to reset by the double-headed torsion spring rod and rotates counterclockwise around the connecting rod 432. After rotating 180 degrees, it stops rotating after being blocked by the baffle 443. As the restriction of the locking rod 413 is released, the multiple rolling elements 433 change from a docked whole to individual units. As the welding position of the rolling welding mechanism 2 changes from back to front, the pressure on the right end to be welded is released one by one. After release, it is beneficial to reduce the damage of welding stress to the electrode tab. At the same time, the partial and gradual release is better than the overall release at one time, which helps to prevent the electrode tabs in the later welding time from still having the problem of application gap.

[0053] It should be noted that the rolling part 433 has already flipped before the rolling welding mechanism 2 moves to the corresponding position, so as to avoid interfering with the movement of the rolling welding mechanism 2.

[0054] When welding is completed, an air pump (not shown in the figure) connected to the air guide channel 324 is installed on the rear side wall of the support boss 321. Air is introduced into the air guide channel 324 through the air pump, and the airflow is blown evenly to the bottom wall of the electrode lug welding and the top wall of the anvil 323 through the branch channel to quickly cool and prevent the electrode lug from sticking to the anvil 323. At the same time, the electric actuator drives the lifting plate 33 to slide downward. After the lifting plate 33 moves down, the long pad block 322 and the anvil 323 lose their bottom support and also slide downward (as shown in the figure). Figure 9As shown in the figure, this facilitates the separation between the electrode lug and the anvil 323 after welding, avoiding deformation and tearing caused by manual intervention, improving welding quality and reducing scrap rate.

[0055] Finally, motor 441 drives connecting plate 442 and baffle 443 to rotate 180 degrees clockwise. Baffle 443 pushes multiple rolling parts 433 to rotate 180 degrees clockwise, so that the subsequent rolling welding mechanism 2 can move backward and reset, driving locking rod 413 to move backward and continue to be inserted into the positioning hole of the rolling roller of rolling part 433; pull out the pin, remove the pressure frame 313 and clamping plate 312, and take out the welded product.

[0056] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0057] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to 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 invention according to the specific circumstances.

[0059] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A battery pack positive and negative electrode welding device, comprising a support platform, characterized in that, The support platform is provided with an anvil mechanism and a rolling welding mechanism distributed on the left and right. The rolling welding mechanism is used to weld the positive and negative electrodes of the battery to the extra-long tabs. It is also provided with a rolling mechanism. The anvil mechanism includes a feeding assembly mounted on a support platform. The feeding assembly is used for feeding and locking the left side of the extra-long tab. A lower support assembly is mounted on the support platform and the feeding assembly. The lower support assembly is used to support and smooth the lower part of the extra-long tab. A lifting plate is mounted on the support platform. The bottom wall of the lifting plate and the top wall of the support platform are connected by an electric push rod. The lifting plate is driven to move up and down through the output end of the electric push rod. The lower support assembly and the lifting plate cooperate to perform air cooling and anti-adhesion material removal operations. The rolling mechanism includes an inverted U-shaped slide that is driven to slide left and right by an electric slider and is connected to the top wall of the support platform. The inverted U-shaped slide is equipped with a rolling component. The rolling component is used to cooperate with the lower support component to flatten the extra-long tabs from both the top and bottom directions at the same time. It is also partially released when the rolling welding mechanism is welding. The feeding assembly includes a feeding platform, and the feeding platform is detachably installed on the top wall of the horizontal section of the support platform. The feeding platform consists of a concave seat fixed to the support platform and a support bar fixed to the left side of the top wall of the concave seat. Ear seats are fixed on the front and rear side walls of the concave seat. A clamping plate is snapped onto the top of the support bar by a U-shaped lower pressure frame. The lower pressure frame and the ear seats are connected by pins. The lower support assembly includes a support boss, and the support boss is slidably connected to the concave base from left to right. The support boss is slidably connected to the inside of the support boss from top to bottom. The anvil and the long pad are stacked on top of each other. The top wall of the anvil is at the same height as the top wall of the support boss, and the bottom wall of the long pad is at the same height as the bottom wall of the support boss. The rolling welding mechanism and the support platform are jointly provided with a locking component. The locking component includes a long plate, and the front side wall of the rolling welding mechanism is fixed with a long plate that is slidably connected to the top wall of the vertical section of the support platform. A telescopic rod is installed on the front part of the left side wall of the long plate, and a locking rod is fixedly connected to the rear side wall of the telescopic end of the telescopic rod. The right side wall of the vertical section of the inverted U-shaped carriage is fixedly connected to the front and rear side walls of the supporting boss by an L-shaped rod. The rolling assembly includes a connecting frame fixed to the right side wall of the horizontal section of the inverted U-shaped carriage. Multiple connecting rods with a front-to-back orientation are evenly distributed on the right side wall of the connecting frame. Double-headed torsion spring rods are connected between adjacent connecting rods. The movable section of the double-headed torsion spring rod is fixedly connected to a rolling element. The rolling element consists of a support plate connected to the double-headed torsion spring rod and a rolling roller rotatably connected to the side of the support plate away from the double-headed torsion spring rod. The rolling roller and the support plate are both provided with a positioning hole that runs through the front and back. The positioning hole is adapted to the locking rod.

2. The battery pack positive and negative electrode welding equipment according to claim 1, characterized in that, The support platform is L-shaped, and the top wall of the vertical section of the support platform is provided with a front-to-back sliding rail. The rolling welding mechanism reciprocates on the sliding rail by being driven by an electric slider. The rolling welding mechanism performs ultrasonic rolling welding operations through a disc-shaped rolling welding head.

3. The battery pack positive and negative electrode welding equipment according to claim 1, characterized in that, The interior of the support boss is symmetrically provided with air channels centered on the anvil base. The air channels consist of a main channel facing forward and backward and branch channels that are evenly connected to the main channel. The top of the branch channels is inclined and close to the anvil base.

4. The battery pack positive and negative electrode welding equipment according to claim 1, characterized in that, The right side wall of the concave base and the left side wall of the vertical section of the support platform are slidably connected by a lifting plate. The initial top wall height of the lifting plate is consistent with the top wall height of the concave base and the top wall height of the vertical section of the support platform.

5. The battery pack positive and negative electrode welding equipment according to claim 1, characterized in that, It also includes a reset assembly, which includes a connecting plate. The connecting plates are rotatably connected to the connecting rods on the frontmost and rearmost sides. A baffle is rotatably connected between the two connecting plates. A motor is installed on the rear side wall of the front vertical section of the inverted U-shaped carriage. The rear side wall of the output end of the motor is connected to the connecting plate on the front side.

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