Flexible lithium battery tab welding tooling

Abstract

The application relates to the lithium battery assembling technical field, in particular to a flexible lithium battery tab welding tool, which comprises a placing frame, a back plate, a plurality of groups of ear pressing groups and pressure adjusting pieces, the back plate is detachably assembled at one end of the placing frame, at least two horizontal cross beams are arranged on the placing frame in an up-down interval mode, horizontal sliding grooves are arranged on the horizontal cross beams, end portions of the pressure adjusting pieces are slidingly assembled in the horizontal sliding grooves, the ear pressing groups are slidingly connected to the horizontal cross beams along the X-axis direction, the ear pressing groups are in a strip shape and are arranged along the Z-axis direction, the ear pressing groups are connected to the horizontal cross beams through the pressure adjusting pieces, the pressure adjusting pieces are arranged along the Y-axis direction, the pressure adjusting pieces are used for driving the ear pressing groups to be close to or far away from the back plate, welding channels for welding are arranged on the ear pressing groups, and pressure sensing units are arranged in the ear pressing groups. The application is convenient for workers or welding equipment to quickly know whether the tabs are pressed in place, and is favorable for improving the subsequent welding quality and welding efficiency.

Description

Technical Field

[0001] This application relates to the field of lithium battery assembly technology, and in particular to a flexible lithium battery tab welding fixture. Background Technology

[0002] A battery module is a unit consisting of multiple individual battery cells connected in series and parallel via electrodes to achieve specific voltage and current transmission. Typically, the series and parallel connection of battery cells is achieved through welding, including laser welding or ultrasonic welding. The welding quality affects the electrical performance and safety of the battery module. Ensuring the welding quality of the lithium battery tabs is crucial for the safety and stable performance of the battery module. Furthermore, the tab welding requires tight pressing to prevent welding defects. Therefore, welding fixtures are indispensable auxiliary tools in the lithium battery welding and assembly process.

[0003] A search of Chinese patent application number CN202110541758.6 reveals a welding fixture for lithium battery modules, comprising a base plate with a bottom positioning structure; a top positioning plate above the base plate with a top positioning groove on its bottom surface adapted to the top shape of the assembled lithium battery; a conductive strip placement groove extending vertically through the top positioning plate, and a conductive strip positioning structure for positioning the conductive strip so that it is vertically aligned with the terminals of the assembled lithium battery; the welding fixture further includes a conductive strip pressure plate assembly and a clamping structure; the conductive strip pressure plate assembly includes a conductive strip pressure block located at the bottom for pressing the conductive strip, and a welding channel on the conductive strip pressure plate assembly that corresponds vertically to each terminal and the conductive strip positioning groove during use, allowing a laser or laser welding head to pass through; the clamping structure is used to clamp the conductive strip pressure plate assembly onto the conductive strip.

[0004] Regarding the aforementioned technologies, the inventors believe that the following technical defects exist and require improvement:

[0005] In the process of using common welding fixtures, the clamping force of the electrode tabs is usually manually adjusted by the workers. If the clamping force of the electrode tabs is too large, it is easy to cause the electrode tabs to bend or be damaged. If the clamping force of the electrode tabs is too small, it is easy to cause problems such as loosening of the electrode tabs and unreliable welding. This defect of not being able to know in time whether the electrode tabs are clamped in place greatly affects the welding quality and welding efficiency. Summary of the Invention

[0006] This application provides a flexible lithium battery tab welding fixture to improve the following technical problems:

[0007] In the process of using common welding fixtures, it is impossible to detect in a timely manner whether the electrode tabs are properly clamped, which greatly affects the welding quality and welding efficiency.

[0008] This application provides a flexible lithium battery tab welding fixture, which adopts the following technical solution:

[0009] A flexible lithium battery tab welding fixture includes a placement frame, a back plate, several sets of pressure tabs, and a voltage regulator. The placement frame has a chamber for placing the battery module to be welded. The back plate is detachably mounted to one end of the placement frame to block the back of the battery module to be welded. The placement frame has at least two horizontal beams arranged vertically at intervals. The horizontal beams have horizontal grooves. The end of the voltage regulator is slidably mounted in the horizontal grooves. The pressure tabs are slidably connected to the horizontal beams along the X-axis. The pressure tabs are elongated and arranged along the Z-axis. The pressure tabs are connected to the horizontal beams through one or more voltage regulators. The voltage regulators are arranged along the Y-axis and are used to drive the pressure tabs closer to or away from the back plate. The pressure tabs provide a clamping force to press the tabs on the battery module to be welded. The pressure tabs have welding channels for welding.

[0010] The pressure sensor unit is installed inside the pressure ear assembly. The pressure sensor unit is used to directly or indirectly provide feedback on the clamping force of the pressure ear assembly on the electrode. The control display screen is installed on the outside of the placement frame and is electrically connected to the pressure sensor unit. The control display screen is used to display and record the clamping force value in real time. The processor of the control display screen is also preset with a standard pressure threshold. When the clamping force value exceeds the standard pressure threshold, the control display screen activates an alarm mode.

[0011] In one feasible technical solution of this application, the tab assembly includes an outer frame and an elastic clamping component. The top and bottom of the outer frame are respectively provided with threaded holes. The pressure regulating component is threadedly connected and passes through the threaded holes. The middle part of the outer frame is provided with a mounting hole. The elastic clamping component is fixed in the mounting hole and is used to clamp the tabs on the battery module to be welded.

[0012] In one feasible technical solution of this application, the pressure regulating component includes a threaded rod, a butterfly handle, and a limiting block. The threaded rod is threaded into the threaded hole, the butterfly handle is fixed to the outer end of the threaded rod, the inner end of the threaded rod is rotatably connected to and perpendicular to the limiting block, forming a T-shaped structure, the cross-section of the horizontal slide groove is a T-shape adapted to the T-shaped structure, and a notch is provided on the horizontal beam to connect the horizontal slide groove, the notch being used for the T-shaped structure to enter and exit.

[0013] In one feasible technical solution of this application, the elastic clamping assembly includes a fixed base, a clamping part, and an elastic connector. The shape of the fixed base is adapted to the mounting hole, and a sliding hole is provided in the middle of the fixed base. The clamping part is slidably assembled in the sliding hole along the Y-axis direction. The elastic connector is located between the top / bottom of the clamping part and the fixed base. The elastic force of the elastic connector is used to drive the clamping part to always be close to the horizontal beam. The welding channel is located in the middle of the clamping part.

[0014] In one feasible technical solution of this application, the pressing part includes a square box, two ear plates, and a conical conical box. One ear plate is vertically fixed to the top of the square box and is used for connection of one set of elastic connectors. The other ear plate is vertically fixed to the bottom of the square box and is used for connection of another set of elastic connectors. The outer end of the conical box is connected to the inner end of the square box. The conical box includes a first inclined plate, a second inclined plate, and a rectangular strip pressure plate. The distance between the first inclined plate and the second inclined plate gradually decreases from the outside to the inside. The rectangular strip pressure plate is fixed to the inner end of the first inclined plate and the second inclined plate. The rectangular strip pressure plate is used to contact and press the tabs on the battery module to be welded. The rectangular strip pressure plate is provided with welding holes for forming the welding channel. The welding holes are elongated and have a partition plate in the middle.

[0015] In one feasible technical solution of this application, the elastic connector includes a connecting bolt, a spring and a plurality of limiting nuts. The connecting bolt passes through the fixed seat, the limiting nuts are threaded onto the inner end of the connecting bolt, the connecting bolt slides through the ear plate, the spring is sleeved on the connecting bolt, and the spring is clamped between the ear plate and the fixed seat.

[0016] In one feasible technical solution of this application, the pressure sensing unit is an annular pressure sensor, which is disposed between the spring and the ear plate. The connecting bolt passes through the annular pressure sensor, and the annular pressure sensor is used to monitor the squeezing force value of the spring on the ear plate. The squeezing force value is used to indirectly replace the clamping force value.

[0017] In one feasible technical solution of this application, the top and bottom of the fixing base are vertically connected to fixing plates, the front of the outer frame is provided with a recessed groove adapted to the fixing plate, and the fixing plate is locked in the recessed groove by a plurality of screws.

[0018] In one feasible technical solution of this application, the placement frame is a cuboid structure and includes a base plate, two side plates and four horizontal beams. The two side plates are fixed to opposite sides of the base plate by bolts. The two side plates are arranged in parallel and are square in shape. The two ends of the horizontal beams are respectively vertically connected to the corners of the two side plates by bolts.

[0019] In one feasible technical solution of this application, the front and rear ends of the side plate are provided with vertically arranged insertion slots, and the back plate is detachably assembled into the insertion slots.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] When operators use the pressure adjustment device to change the elastic clamping force, the pressure sensing unit and the control display screen work together to transform the traditional method of judging whether the clamping is tight by feel into a method of accurately detecting the pressure and displaying the clamping force on the screen. This allows operators or welding equipment to quickly know whether the tabs are clamped in place. When the clamping force exceeds the standard pressure value, the control display screen will activate the alarm mode to warn that subsequent tab welding work cannot be carried out, which helps to improve the subsequent welding quality and welding efficiency.

[0022] Based on the size and tab position of the battery module to be welded, the position of the clamping tab group can be moved horizontally. Furthermore, the number of clamping tab groups can be increased adaptively according to assembly needs. Then, the clamping force of the clamping tab group on the battery module to be welded can be adjusted using a pressure adjusting component to ensure better welding results. The entire fixture is not only simple in structure and easy to manufacture, but also convenient for picking up and placing the battery module to be welded, and easy to adjust. It can better adapt to the tab welding needs of battery modules of different specifications, eliminating the need to design separate welding fixtures for different specifications of battery modules. It can also perform single tab welding or simultaneous welding of multiple tabs, meeting the needs of various welding equipment and processes, and reducing R&D time and costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the flexible lithium battery tab welding fixture according to an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the pressure lug assembly and pressure regulating component in the embodiments of this application.

[0026] Figure 3 This is a schematic diagram of the structure of the elastic clamping component in the embodiments of this application.

[0027] Figure 4 This is a schematic diagram of the clamping part in an embodiment of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Placement frame; 11. Horizontal beam; 111. Horizontal groove; 112. Notch; 12. Base plate; 13. Side plate; 131. Insertion groove;

[0030] 2. Back panel;

[0031] 3. Pressure ear assembly; 300. Welding channel; 31. Outer frame; 311. Threaded hole; 312. Mounting hole; 313. Countersunk groove; 32. Elastic clamping assembly; 321. Fixing base; 3211. Sliding hole; 3212. Fixing plate; 322. Clamping part; 3221. Square box; 3222. Ear plate; 3223. First inclined plate; 3224. Second inclined plate; 3225. Rectangular strip pressure plate; 32251. Welding hole; 32252. Divider plate; 323. Elastic connector; 3231. Connecting bolt; 3232. Spring; 3233. Limit nut;

[0032] 4. Pressure regulating component; 41. Threaded rod; 42. Butterfly handle; 43. Limit block;

[0033] 5. Pressure sensing unit;

[0034] 6. Control the display screen. Detailed Implementation

[0035] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0036] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0037] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not 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 application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0039] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0040] This application discloses a flexible lithium battery tab welding fixture. (Refer to...) Figure 1-4 The flexible lithium battery tab welding fixture includes a placement frame 1, a back plate 2, several sets of pressure tabs 3, and a pressure regulating component 4. In this embodiment, the pressure tabs 3 are preferably two sets. The placement frame 1 is provided with a chamber for placing the battery module to be welded. The back plate 2 is detachably mounted to one end of the placement frame 1 to block the back of the battery module to be welded. The placement frame 1 is provided with at least two horizontal beams 11 arranged vertically at intervals. The horizontal beams 11 are provided with horizontal grooves 111. The end of the pressure regulating component 4 slides... The movable assembly is installed in the horizontal slide groove 111. The pressure ear assembly 3 is slidably connected to the horizontal crossbeam 11 along the X-axis direction. The pressure ear assembly 3 is long and arranged along the Z-axis direction. The pressure ear assembly 3 is connected to the horizontal crossbeam 11 through one or more pressure regulating components 4. The pressure regulating components 4 are arranged along the Y-axis direction. The pressure regulating components 4 are used to drive the pressure ear assembly 3 to move closer to or away from the back plate 2. The pressure ear assembly 3 is used to provide the clamping force to press the upper electrode of the battery module to be welded. The pressure ear assembly 3 is provided with a welding channel 300 for welding.

[0041] The pressure sensor unit 5 is installed inside the pressure clip assembly 3. The pressure sensor unit 5 is used to directly or indirectly provide feedback on the clamping force of the pressure clip assembly 3 on the electrode tab. The control display screen 6, which is electrically connected to the pressure sensor unit 5, is installed on the outside of the placement frame 1. The control display screen 6 is an integrated computer screen with a computer processor. The control display screen 6 is used to display and record the clamping force value in real time. The processor of the control display screen 6 is also preset with a standard pressure threshold. When the clamping force value exceeds the standard pressure threshold, the control display screen 6 activates the alarm mode to warn that subsequent electrode tab welding work cannot be carried out.

[0042] In this embodiment, the clamping tab assembly 3 includes an outer frame 31 and an elastic clamping component 32. The top and bottom of the outer frame 31 are respectively provided with threaded holes 311. The pressure adjusting component 4 is threadedly connected to and passes through the threaded holes 311. A mounting hole 312 is provided in the middle of the outer frame 31. The elastic clamping component 32 is fixed in the mounting hole 312 and is used to clamp the tabs on the battery module to be welded. The clamping tab assembly 3 designed above not only maintains good structural strength through the outer frame 31, allowing the outer frame 31 to cooperate with the pressure adjusting component 4 to complete the adjustment and locking purposes, but also the elastic clamping component 32 can effectively avoid rigid contact with the tabs, providing a certain degree of protection for the battery module's tabs. Since the pressure adjusting component 4 can drive the outer frame 31 to move a certain distance along the Y-axis by a twisting operation, the clamping force on the tabs can be appropriately adjusted.

[0043] In this embodiment, the pressure regulating component 4 includes a threaded rod 41, a butterfly handle 42, and a limiting block 43. The threaded rod 41 is threaded into a threaded hole 311, and the butterfly handle 42 is fixed to the outer end of the threaded rod 41. The inner end of the threaded rod 41 is rotatably connected to and perpendicular to the limiting block 43, forming a T-shaped structure. The cross-section of the horizontal slide 111 is a T-shape adapted to the T-shaped structure. A notch 112 communicating with the horizontal slide 111 is provided on the horizontal beam 11, which is used for the T-shaped structure to enter and exit. The pressure regulating component 4 and the horizontal beam 11 designed above have a simple and robust structure and are easy to assemble. Moreover, the limiting block 43 can be fixed in the Y-axis direction and slide in the X-axis direction within the horizontal slide 111, making the adjustment operation more convenient and the connection more stable.

[0044] In this embodiment, the elastic clamping assembly 32 includes a fixed base 321, a clamping part 322, and an elastic connector 323. The fixed base 321 is adapted to the mounting hole 312. A sliding hole 3211 is provided in the middle of the fixed base 321. The clamping part 322 is slidably assembled in the sliding hole 3211 along the Y-axis direction. The elastic connector 323 is located between the top / bottom of the clamping part 322 and the fixed base 321. The elastic force of the elastic connector 323 is used to drive the clamping part 322 to always be close to the horizontal beam 11. The welding channel 300 is located in the middle of the clamping part 322.

[0045] The clamping part 322 includes a square box 3221, two ear plates 3222, and a conical conical box. One ear plate 3222 is vertically fixed to the top of the square box 3221 and is used for connection of one set of elastic connectors 323. The other ear plate 3222 is vertically fixed to the bottom of the square box 3221 and is used for connection of another set of elastic connectors 323. The outer end of the conical box is connected to the inner end of the square box 3221. The conical box includes a first inclined plate 3223, a second inclined plate 3224, and a rectangular... The distance between the strip pressure plate 3225, the first inclined plate 3223, and the second inclined plate 3224 gradually decreases from the outside to the inside. The rectangular strip pressure plate 3225 is fixed to the inner end of the first inclined plate 3223 and the second inclined plate 3224. The rectangular strip pressure plate 3225 is used to contact and press the tabs on the battery module to be welded. The rectangular strip pressure plate 3225 is provided with welding holes 32251 for forming welding channels 300. The welding holes 32251 are elongated and have a partition plate 32252 in the middle.

[0046] The elastic connector 323 includes a connecting bolt 3231, a spring 3232, and multiple limiting nuts 3233. The connecting bolt 3231 passes through the fixed seat 321, and the limiting nuts 3233 are threaded onto the inner end of the connecting bolt 3231. The connecting bolt 3231 slides through the ear plate 3222, and the spring 3232 is sleeved on the connecting bolt 3231 and is clamped between the ear plate 3222 and the fixed seat 321.

[0047] The elastic clamping component 32 designed above has a simple and robust structure. It can form a welding channel 300 in the middle to facilitate the passage of the laser or laser welding head in the welding equipment, according to the welding requirements of the electrode tab. The structural design of the elastic connector 323 can better provide clamping force to the clamping part 322 on the electrode tab, and the clamping and fixing effect of the electrode tab is better.

[0048] Specifically, the pressure sensing unit 5 is a ring pressure sensor, which is located between the spring 3232 and the ear plate 3222. The connecting bolt 3231 passes through the ring pressure sensor. The ring pressure sensor is used to monitor the squeezing force of the spring 3232 on the ear plate 3222. The squeezing force value is used to indirectly replace the clamping force value.

[0049] In this embodiment, in order to optimize the flatness of the front structure of the pressure ear assembly 3, the top and bottom of the fixing base 321 are vertically connected with fixing plates 3212, and the front of the outer frame 31 is provided with a groove 313 adapted to the fixing plate 3212. The fixing plate 3212 is locked in the groove 313 by multiple screws, thereby facilitating a firm connection between the fixing base 321 and the outer frame 31.

[0050] In this embodiment, the placement frame 1 is a cuboid structure and includes a base plate 12, two side plates 13 and four horizontal beams 11. The two side plates 13 are fixed to the opposite sides of the base plate 12 by bolts. The two side plates 13 are arranged in parallel and are square in shape. The two ends of the horizontal beams 11 are respectively connected vertically to the corners of the two side plates 13 by bolts. The front and rear ends of the side plates 13 are provided with vertically arranged insertion slots 131. The back plate 2 can be detachably assembled into the insertion slots 131.

[0051] The placement frame 1 designed above has a simple and stable structure, low manufacturing cost, and makes it easy to remove or place the battery module to be welded from the cavity. In addition, the back plate 2 and the pressure ear group 3 provide a clamping effect on the front and back of the battery module, which helps to improve the stability of the battery module during welding. After welding is completed, the back plate 2 can be pulled out from the insertion slot 131, making the operation more convenient.

[0052] The beneficial technical effects of the flexible lithium battery tab welding fixture in this application are roughly as follows:

[0053] When the operator uses the pressure regulating component 4 to change the elastic clamping force, the pressure sensing unit 5 and the control display screen 6 work together to transform the traditional method of judging whether the clamping is in place by feel into a method of accurately detecting the pressure and displaying the clamping force on the screen. This allows the operator or welding equipment to quickly know whether the tab is clamped in place. When the clamping force exceeds the standard pressure value, the control display screen 6 activates the alarm mode to warn that subsequent tab welding work cannot be carried out, which helps to improve the subsequent welding quality and welding efficiency.

[0054] Simultaneously, based on the size and tab position of the battery module to be welded, the position of the pressure tab group 3 can be moved horizontally. Furthermore, the number of pressure tab groups 3 can be increased adaptively according to assembly needs. Then, the clamping force of the pressure tab group 3 on the tabs of the battery module to be welded can be adjusted by the pressure adjusting component 4 to ensure better welding results. The entire fixture is not only simple in structure and easy to manufacture, but also convenient to pick up and put down the battery module to be welded and easy to adjust. It can better adapt to the tab welding needs of battery modules of different specifications. There is no need to design separate welding fixtures for different specifications of battery modules. It can also perform single tab welding or simultaneous welding of multiple tabs, which can meet the needs of various welding equipment and processes, and reduce R&D time and costs.

[0055] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A flexible lithium battery tab welding fixture, characterized in that, The device includes a placement frame (1), a back plate (2), several sets of pressure lugs (3), and a pressure regulating component (4). The placement frame (1) has a chamber for placing the battery module to be welded. The back plate (2) is detachably mounted to one end of the placement frame (1) to block the back of the battery module to be welded. The placement frame (1) has at least two horizontal beams (11) arranged vertically at intervals. The horizontal beams (11) have horizontal grooves (111). The end of the pressure regulating component (4) is slidably mounted in the horizontal grooves (111). The ear assembly (3) is slidably connected to the horizontal beam (11) along the X-axis direction. The pressure ear assembly (3) is long and arranged along the Z-axis direction. The pressure ear assembly (3) is connected to the horizontal beam (11) through one or more pressure regulating components (4). The pressure regulating components (4) are arranged along the Y-axis direction. The pressure regulating components (4) are used to drive the pressure ear assembly (3) closer to or further away from the back plate (2). The pressure ear assembly (3) is used to provide a clamping force to press the upper electrode of the battery module to be welded. The pressure ear assembly (3) is provided with a welding channel (300). The pressure lug assembly (3) is equipped with a pressure sensing unit (5) inside. The pressure sensing unit (5) is used to directly or indirectly provide feedback on the clamping force of the pressure lug assembly (3) on the electrode. The outer side of the placement frame (1) is equipped with a control display screen (6) electrically connected to the pressure sensing unit (5). The control display screen (6) is used to display and record the clamping force value in real time. The processor of the control display screen (6) is also preset with a standard pressure threshold. When the clamping force value exceeds the standard pressure threshold, the control display screen (6) starts an alarm mode. The pressure lug assembly (3) includes an outer frame (31) and an elastic clamping component (32). The top and bottom of the outer frame (31) are respectively provided with threaded holes (311). The pressure adjusting component (4) is threaded and passes through the threaded holes (311). The middle part of the outer frame (31) is provided with a mounting hole (312). The elastic clamping component (32) is fixed to the outer frame. The mounting hole (312) is used to press the tabs on the battery module to be welded; the elastic pressing assembly (32) includes a fixing base (321), a pressing part (322), and an elastic connector (323). The shape of the fixing base (321) is adapted to the mounting hole (312). A sliding hole (3211) is provided in the middle of the fixing base (321). The pressing part (322) is slidably assembled in the sliding hole (3211) along the Y-axis direction. In the middle, the elastic connector (323) is located between the top / bottom of the clamping part (322) and the fixed seat (321). The elastic force of the elastic connector (323) is used to drive the clamping part (322) to always be close to the horizontal beam (11). The welding channel (300) is located in the middle of the clamping part (322). The clamping part (322) includes a square box (3221), two ear plates (3222) and a conical conical box.

2. The flexible lithium battery tab welding fixture according to claim 1, characterized in that, The pressure regulating component (4) includes a threaded rod (41), a butterfly handle (42), and a limiting block (43). The threaded rod (41) is threaded into the threaded hole (311). The butterfly handle (42) is fixed to the outer end of the threaded rod (41). The inner end of the threaded rod (41) is rotatably connected to and perpendicular to the limiting block (43) to form a T-shaped structure. The cross-section of the horizontal slide (111) is a T-shape adapted to the T-shaped structure. The horizontal beam (11) is provided with a notch (112) that connects to the horizontal slide (111). The notch (112) is used for the T-shaped structure to enter and exit.

3. The flexible lithium battery tab welding fixture according to claim 1, characterized in that, One of the ear plates (3222) is vertically fixed to the top of the square box (3221) and is used for connection of one set of elastic connectors (323), and the other ear plate (3222) is vertically fixed to the bottom of the square box (3221) and is used for connection of another set of elastic connectors (323). The outer end of the conical conical box is connected to the inner end of the square box (3221). The conical conical box includes a first inclined plate (3223), a second inclined plate (3224), and a rectangular strip pressure plate (3225). The first inclined plate (3223) is vertically fixed to the top of the square box (3221) and is used for connection of one set of elastic connectors (323). 23) The distance between the first inclined plate (3223) and the second inclined plate (3224) gradually decreases from the outside to the inside. The rectangular strip pressure plate (3225) is fixed to the inner end of the first inclined plate (3223) and the second inclined plate (3224). The rectangular strip pressure plate (3225) is used to contact and press the tabs on the battery module to be welded. The rectangular strip pressure plate (3225) is provided with a welding hole (32251) for forming the welding channel (300). The welding hole (32251) is long and has a partition plate (32252) in the middle.

4. The flexible lithium battery tab welding fixture according to claim 3, characterized in that, The elastic connector (323) includes a connecting bolt (3231), a spring (3232), and a plurality of limiting nuts (3233). The connecting bolt (3231) passes through the fixed seat (321), and the limiting nuts (3233) are threadedly fitted to the inner end of the connecting bolt (3231). The connecting bolt (3231) slides through the ear plate (3222), and the spring (3232) is sleeved on the connecting bolt (3231). The spring (3232) is sandwiched between the ear plate (3222) and the fixed seat (321).

5. The flexible lithium battery tab welding fixture according to claim 4, characterized in that, The pressure sensing unit (5) is an annular pressure sensor. The annular pressure sensor is located between the spring (3232) and the ear plate (3222). The connecting bolt (3231) passes through the annular pressure sensor. The annular pressure sensor is used to monitor the squeezing force value of the spring (3232) on the ear plate (3222). The squeezing force value is used to indirectly replace the clamping force value.

6. The flexible lithium battery tab welding fixture according to claim 1, characterized in that, The top and bottom of the fixing base (321) are vertically connected to fixing plates (3212), and the front of the outer frame (31) is provided with a recess (313) adapted to the fixing plate (3212). The fixing plate (3212) is locked in the recess (313) by multiple screws.

7. The flexible lithium battery tab welding fixture according to claim 1, characterized in that, The placement frame (1) is a cuboid structure and includes a base plate (12), two side plates (13) and four horizontal beams (11). The two side plates (13) are fixed to the opposite sides of the base plate (12) by bolts. The two side plates (13) are arranged in parallel and are square in shape. The two ends of the horizontal beams (11) are respectively vertically connected to the corners of the two side plates (13) by bolts.

8. The flexible lithium battery tab welding fixture according to claim 7, characterized in that, The front and rear ends of the side plate (13) are provided with vertically arranged insertion slots (131), and the back plate (2) can be detachably assembled into the insertion slots (131).

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