Battery cell chip pressing equipment and battery cell chip counter-pressing system

Abstract

The invention provides battery cell chip pressing equipment and a battery cell chip opposite pressing system. The battery cell chip pressing equipment comprises a fixed seat, a moving assembly, a floating assembly, a mounting base, a copper nozzle and a pre-pressing stabilizing assembly, the moving assembly is fixed to the fixed seat and used for driving the floating assembly to move relative to the fixed seat, and the floating assembly is located between the moving assembly and the mounting base; the copper nozzle and the pre-pressing stabilizing assembly are both installed on the installation base, the pre-pressing stabilizing assembly comprises a first elastic piece and an insulation supporting block, and the two ends of the first elastic piece abut against the insulation supporting block and the installation base respectively. The end face, far away from the mounting base, of the insulating supporting block is flush with the end face, far away from the mounting base, of the copper nozzle. According to the battery cell chip pressing equipment and the battery cell chip opposite-pressing system, the stability and the welding quality in the chip pressing process can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing equipment, and in particular to a battery cell tab pressing device and a battery cell tab pressing system. Background Art

[0002] During the manufacturing process of blade cell modules, metal tabs are used to connect the terminals of adjacent cells. The tab clamping mechanism is crucial for ensuring a tight fit between the tabs and the terminals, and its performance significantly impacts the stability of the welding process and the quality of the final product.

[0003] At present, copper nozzles are usually used to press the tabs. In order to avoid short circuits between battery cells caused by the pressing of copper nozzles, the commonly used pressing schemes in the existing technology include the staggered pressing scheme (the copper nozzles on both sides of the module are staggered, and there is a situation where the battery cells are pressed on one side) and the vacant pressing scheme (both sides of the battery cell are pressed, but the pressed battery cells are arranged at intervals). In the staggered pressing scheme, when the copper nozzle presses the tabs, the opposite side of the battery cell that is pressed on one side has no support. Excessive pressing force will cause the battery cell to move, and too little pressing force will cause the tabs to fit poorly, and the welding quality cannot be guaranteed. In the vacant pressing scheme, due to the dimensional tolerance of the battery cell itself and the stacking position deviation, it is impossible to guarantee that all copper nozzles will press the tabs onto the pole. If the pressing force is too large, the tabs are easy to deform, resulting in abnormal welding quality.

[0004] Therefore, it is necessary to provide an improved battery cell tab pressing device and a battery cell tab pressing system to solve the above problems. Summary of the Invention

[0005] The present application provides a battery cell tab pressing device and a battery cell tab pressing system to improve the stability of the tab pressing process and the welding quality.

[0006] The present application discloses a battery cell tab pressing device, including a fixed seat, a movable component, a floating component, a mounting base, a copper nozzle and a pre-stressing stabilization component. The movable component is fixed to the fixed seat and is used to drive the floating component to move relative to the fixed seat. The floating component is located between the movable component and the mounting base; the copper nozzle and the pre-stressing stabilization component are both installed on the mounting base, and the pre-stressing stabilization component includes a first elastic member and an insulating support block, the two ends of the first elastic member respectively abut the insulating support block and the mounting base, and the end face of the insulating support block away from the mounting base is flush with the end face of the copper nozzle away from the mounting base.

[0007] Furthermore, the mounting base includes an outer frame, a floating mating frame and a mounting platform. The inner and outer sides of the floating mating frame are respectively connected to the mounting platform and the outer frame. The floating component is mated with the floating mating frame. The mounting platform is connected to the copper nozzle and the pre-compression stabilization component.

[0008] Furthermore, the mounting platform includes a base, two copper nozzle mounting positions protruding from the base to a side away from the floating component, and two support block mounting positions protruding from the copper nozzle mounting positions to the left and right sides respectively; the copper nozzles are installed in both copper nozzle mounting positions, and the pre-compression stabilization component is installed in one of the two support block mounting positions.

[0009] Furthermore, the pre-stressing stabilization assembly also includes a first guide rod, one end of which is fixed to the support block mounting position, the first guide rod passes through the insulating support block and is movable relative to the insulating support block, and the first elastic member is sleeved outside the first guide rod.

[0010] Furthermore, a penetrating light outlet channel is provided inside the movable component, the mounting platform and the copper nozzle, and the battery cell bar pressing device also includes a shielding cover, which is located between the movable component and the mounting base, and the shielding cover is located between the light outlet channel and the floating component.

[0011] Furthermore, one end of the shielding cover is fixed to the inner wall of the floating matching frame, and the other end of the shielding cover is in close contact with the inner wall of the moving component.

[0012] Furthermore, the moving component includes a driving member, a connecting member and a moving base, the driving member is fixed to the fixed base, the connecting member connects the driving member and the moving base respectively, and the moving base is connected to the floating component; the driving member is used to drive the connecting member to move and drive the moving base to move.

[0013] Furthermore, the moving assembly further includes a guide rail and a slider that are slidably matched, the guide rail is fixed to the fixed seat, and the slider is fixed to the moving base.

[0014] The present application also discloses a battery cell bar pressing system, comprising at least one pair of relatively arranged battery cell bar pressing devices as described above.

[0015] Furthermore, each of the battery cell tab pressing devices includes two copper nozzles and one pre-compression stabilization component, and the two copper nozzles are respectively a first copper nozzle and a second copper nozzle; along the first direction, the arrangement order of the copper nozzles and the pre-compression stabilization component on one side is: first copper nozzle, second copper nozzle, pre-compression stabilization component; the arrangement order of the copper nozzles and the pre-compression stabilization component on the other side is: pre-compression stabilization component, first copper nozzle, second copper nozzle.

[0016] The battery cell tab pressing device and battery cell tab pressing system of the present application are provided with a pre-compression stabilization component including a first elastic member and an insulating support block, which is installed side by side with the copper nozzle and flush with the end face, so that they can work together during the compression process. The insulating support block can provide pre-support force first, and together with the copper nozzle, form a stable compression area, which effectively prevents the battery cell from moving during the compression stage and the welding process. At the same time, the elastic design of the floating component and the pre-compression stabilization component are combined to form a multi-stage floating compensation mechanism, which can automatically absorb and adapt to the thickness tolerance and position deviation of the battery cell stack, ensure that a uniform and reliable compression force can be applied at each welding point, ensure the uniform fit between the tab and the pole, improve the consistency of the welding quality, and enhance the stability of the compression process and the welding quality.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0019] Figure 1 It is a three-dimensional diagram of the battery cell tab pressing device of the present application.

[0020] Figure 2 yes Figure 1 A three-dimensional diagram of the central structure.

[0021] Figure 3 yes Figure 2 side view.

[0022] Figure 4 yes Figure 2 A three-dimensional diagram of the central structure.

[0023] Figure 5 yes Figure 1 A perspective view of the mounting base.

[0024] Figure 6 yes Figure 5 A three-dimensional view of the assembled mounting base, copper nozzle, and pre-load stabilization component.

[0025] Figure 7 yes Figure 2 A stereogram from another perspective.

[0026] Figure 8 It is a three-dimensional diagram of the light shield, mounting base and moving assembly.

[0027] Figure 9 This is a schematic diagram of the battery cell tab pressing system of the present application when the tabs are compressed.

[0028] Description of reference numerals: 10. Fixed seat; 11. Upper fixed plate; 12. Lower fixed plate; 20. Moving assembly; 21. Driving member; 211. Fixed part; 212. Telescopic part; 22. Connecting member; 23. Moving base; 231. Main base; 232. Upper moving plate; 233. Lower moving plate; 24. Guide rail; 25. Slider; 30. Floating assembly; 31. Second elastic member; 32. Second guide rod; 40. Mounting base; 41. Outer frame; 42. Floating matching frame; 43. Mounting platform; 431. Base; 432. Copper nozzle installation position; 433. Support block installation position; 50. Copper nozzle; 51. First copper nozzle; 52. Second copper nozzle; 60. Pre-compression stabilization assembly; 61. First elastic member; 62. Insulating support block; 63. First guide rod; 70. Light output channel; 80. Shielding cover; 91. Bar piece; 92. Pole. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely here with reference to the accompanying drawings. In the following description, when referring to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0030] If there are terms in the embodiments of this application that refer to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first" and "second" in the embodiments of this application are used only for descriptive convenience and should not be understood as indicating or implying relative importance.

[0031] The following embodiments of the present application are described in detail with reference to the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can complement or be combined with each other.

[0032] like Figures 1 to 2 As shown, the present application provides a battery cell tab pressing device for pressing a tab 91 against a pole 92 of a blade battery cell and welding the tab 91 and pole 92. The battery cell tab pressing device includes a fixed seat 10, a moving assembly 20, a floating assembly 30, a mounting base 40, a copper nozzle 50, and a pre-compression stabilization assembly 60. Figure 1 In the embodiment shown, two battery cell tab pressing devices are arranged side by side.

[0033] The mounting base 10 is used to secure and support the entire cell bar clamping device and connect to other devices used in the cell module assembly process (such as the horizontal and vertical moving tracks). The moving assembly 20 is fixed to the mounting base 10 and is used to drive the floating assembly 30 to move relative to the mounting base 10.

[0034] For details, please refer to Figure 3 and Figure 4 The moving assembly 20 includes a driving member 21, a connecting member 22 and a moving base 23. The driving member 21 is fixed to the fixed base 10, and is used to drive the connecting member 22 to move, and further drive the moving base 23 to move. The driving member 21 is a cylinder, and includes a fixed portion 211 and a telescopic portion 212. The telescopic portion 212 can extend or retract relative to the fixed portion 211. The fixed portion 211 is fixed to the fixed base 10, and the telescopic portion 212 is connected to the connecting member 22 and can drive the connecting member 22 to move along the telescopic direction of the telescopic portion 212. The connecting member 22 is respectively connected to the driving member 21 and the moving base 23. The moving base 23 is connected to the floating assembly 30 to further drive the floating assembly 30 to move.

[0035] Furthermore, the moving assembly 20 further includes a guide rail 24 and a slider 25. The guide rail 24 is fixed to the fixed base 10 and is arranged parallel to the telescopic direction of the telescopic portion 212. The slider 25 is fixed to the moving base 23. The guide rail 24 and the slider 25 slide together to ensure smooth movement of the moving assembly 20.

[0036] Specifically, the fixed base 10 includes an upper fixed plate 11 positioned above the movable base 23 and a lower fixed plate 12 positioned below the movable base 23. The movable base 23 comprises a main base 231, an upper movable plate 232, and a lower movable plate 233. The main base 231 is positioned perpendicular to the direction of movement of the movable assembly 20. The upper movable plate 232 and the lower movable plate 233 are both positioned perpendicular to the main base 231 and connected to its upper and lower ends. The main base 231 is connected to the floating assembly 30, and the upper movable plate 232 is connected to the connector 22.

[0037] Guide rails 24 and sliders 25 are provided above and below the movable base 23. The upper movable plate 232 is located below the upper fixed plate 11, with the slider 25 provided on top. The guide rails 24 are provided on the bottom of the upper fixed plate 11. The lower movable plate 233 is located above the lower fixed plate 12, with the slider 25 provided on the bottom. The guide rails 24 are provided on the top of the lower fixed plate 12.

[0038] In this way, the upper and lower sides of the movable assembly 20 are guided by the guide rails 24 and sliders 25, ensuring that the movable base 23 moves in a straight line. This greatly improves the movement accuracy and guidance of the movable base 23, preventing deviation or jamming, and ensuring precise clamping. It also improves the overall structural stability and enhances the reliability of the battery cell tab clamping device.

[0039] The floating assembly 30 is located between the moving assembly 20 and the mounting base 40 and includes a second elastic member 31 and a second guide rod 32. One end of the second guide rod 32 is fixed to the mounting base 40, while the other end extends through the main base 231 of the moving base 23 and is movable relative to the main base 231. The second elastic member 31 is sleeved around the second guide rod 32, with its ends abutting the mounting base 40 and the moving base 23, respectively. In this embodiment, the second elastic member 31 is a spring, and the second guide rod 32 is an optical axis bolt.

[0040] By setting up the floating component 30, the position and angle of the mounting base 40, the copper nozzle 50 and the pre-compression stabilization component 60 can be adjusted to compensate for the height and angle deviation of the battery cell stack. When the copper nozzle 50 presses the bar, it provides protection for the positive compression of the copper nozzle 50 and the bar 91, effectively improving the fitting accuracy of the copper nozzle 50 and the bar 91.

[0041] like Figure 5 and Figure 6 The mounting base 40 includes an outer frame 41, a floating mating frame 42, and a mounting platform 43. The inner and outer sides of the floating mating frame 42 are connected to the mounting platform 43 and the outer frame 41, respectively. The outer frame 41 is sleeved outside the floating mating frame 42. The floating mating frame 42 is located outside the mounting platform 43 and wraps around the mounting platform 43 from the side closest to the floating assembly 30. The floating assembly 30 engages with the floating mating frame 42, and the second elastic member 31 abuts the floating mating frame 42. The mounting platform 43 is connected to the copper nozzle 50 and the pre-load stabilization assembly 60.

[0042] Specifically, the mounting platform 43 includes a base 431, two copper nozzle mounting positions 432, and two support block mounting positions 433. The base 431 is located within the floating mating frame 42. The two copper nozzle mounting positions 432 protrude from the base 431 toward the side away from the floating assembly 30. The two support block mounting positions 433 protrude to the left and right of the copper nozzle mounting position 432, respectively. A copper nozzle 50 is mounted in each of the copper nozzle mounting positions 432, and a preload stabilization assembly 60 is mounted in one of the two support block mounting positions 433.

[0043] In other words, the mounting platform 43 has four mounting locations. The two central locations are copper nozzle mounting locations 432, each of which is equipped with a copper nozzle 50. The two side mounting locations are support block mounting locations 433, one of which is equipped with a pre-load stabilization assembly 60. Thus, on each mounting platform 43, a combination of "copper nozzle 50, copper nozzle 50, pre-load stabilization assembly 60" or "pre-load stabilization assembly 60, copper nozzle 50, copper nozzle 50" can be formed.

[0044] The floating assembly 30 includes eight second elastic members 31 and eight second guide rods 32. Each of the four mounting positions on the mounting platform 43 corresponds to a second elastic member 31 and a second guide rod 32 at its upper and lower portions, respectively. When the tab 91 is tightened, each mounting position is supported by the elastic force of the second elastic member 31 along the direction of movement of the movable assembly 20, further improving the fit between the copper nozzle 50 and preload stabilization assembly 60 and the tab 91, as well as the fit between the tab 91 and the terminal 92.

[0045] The copper nozzle 50 and the pre-compression stabilizing assembly 60 are both mounted on the mounting base 40. The copper nozzle 50 is fixed to the copper nozzle mounting position 432 by a fixing member, and the copper nozzle 50 is pressed against the copper nozzle mounting position 432 during the welding process of the tab 91 and the pole 92.

[0046] The preload stabilization assembly 60 includes a first elastic member 61, an insulating support block 62, and a first guide rod 63. One end of the first guide rod 63 is fixed to the support block mounting position 433, while the other end extends through the insulating support block 62 and is movable relative to the insulating support block 62. The first elastic member 61 is sleeved over the first guide rod 63, with its ends respectively abutting the insulating support block 62 and the support block mounting position 433 of the mounting base 40. In this embodiment, the first elastic member 61 is a spring, and the first guide rod 63 is an optical axis bolt. Each insulating support block 62 corresponds to two first elastic members 61 and two first guide rods 63.

[0047] The insulating support block 62 is crafted from high-strength insulating materials such as polymethylene and bakelite, fundamentally eliminating the risk of short circuits during the compression of the tab 91 and enhancing operational safety. The end of the insulating support block 62 facing away from the mounting base 40 is flush with the end of the copper nozzle 50 facing away from the mounting base 40. This allows the insulating support block 62 to synchronously contact the tab 91 with the copper nozzle 50 and provide pre-support force, preventing cell movement and tab 91 deformation during the compression phase. This improves overall compression stability and weld quality consistency.

[0048] At the same time, the first elastic member 61 is combined with the elastic design of the floating assembly 30 to form a multi-level floating compensation mechanism, which can automatically absorb and adapt to the thickness tolerance and position deviation of the battery cell stack, ensuring that uniform and reliable clamping force can be applied at each welding point, further preventing the battery cells from moving, and improving the clamping fit and welding quality.

[0049] like Figure 7 and Figure 8 As shown, the moving component 20, the mounting platform 43 and the copper nozzle 50 are internally provided with a light exit channel 70 that passes through the moving direction of the moving component 20, which is used to provide an optical path for the laser welding of the bar 91 and the pole 92. The battery cell bar pressing device also includes a shielding cover 80. The shielding cover 80 is located between the moving component 20 and the mounting base 40, and between the light exit channel 70 and the floating component 30, so as to prevent the spattering welding slag from falling onto the floating component 30 during the welding process of the bar 91 and the pole 92, causing the copper nozzle 50 and the pre-compression stabilization component 60 to be pressed and stuck, thereby improving the operational reliability of the battery cell bar pressing device and extending the service life of the battery cell bar pressing device.

[0050] Specifically, the end of the shielding cover 80 close to the copper mouth 50 is fixed to the inner wall of the floating mating frame 42 by fasteners, and the end of the shielding cover 80 away from the copper mouth 50 is close to the inner wall of the main base 231 of the movable component 20, forming a dynamic sealing structure that can always maintain a good shielding effect as the mounting base 40 moves or floats.

[0051] The present application also provides a battery cell tab pressing system, comprising at least one pair of the battery cell tab pressing devices described above. The pair of battery cell tab pressing devices are positioned opposite each other, simultaneously pressing tabs 91 from both sides of the battery cell. Each battery cell tab pressing device comprises two copper nozzles 50 and a pre-compression stabilization assembly 60. The two copper nozzles 50 are respectively a first copper nozzle 51 and a second copper nozzle 52. The first copper nozzle 51 and the second copper nozzle 52 have identical structures.

[0052] like Figure 9 As shown, along the first direction, the arrangement order of the copper nozzle 50 and the pre-stressing stabilization component 60 on one side is: the first copper nozzle 51, the second copper nozzle 52, the pre-stressing stabilization component 60, and the arrangement order of the copper nozzle 50 and the pre-stressing stabilization component 60 on the other side is: the pre-stressing stabilization component 60, the first copper nozzle 51, the second copper nozzle 52. The poles 92 on both sides of each battery cell can be supported by the copper nozzle 50 or the pre-stressing stabilization component 60, avoiding the problem of battery cell movement. At the same time, since there is no empty space between the copper nozzle 50 and the pre-stressing stabilization component 60, the two pressing points of the bar 91 on each side that cooperate with the pole 92 can be pressed, and the bar 91 will not be deformed due to uneven force, further improving the welding quality.

[0053] Since each cell tab pressing device in this embodiment provides two copper nozzles 50 and a pre-compression stabilization component 60, during the cell production process, each time a welding operation is completed, the cell module is moved two steps, or the cell tab pressing device is moved two steps, to complete the welding of the cell pole 92 and the tab 91.

[0054] The battery cell tab pressing device and battery cell tab pressing system of the present application are provided with a pre-compression stabilization component 60 including a first elastic member 61 and an insulating support block 62, and are installed side by side with the copper nozzle 50 and flush with the end face, so that they can work together during the compression process. The insulating support block 62 can preferentially provide pre-support force, and together with the copper nozzle 50, form a stable compression area, which effectively prevents the battery cell from moving during the compression stage and the welding process. At the same time, the floating component 30 is combined with the elastic design of the pre-compression stabilization component 60 to form a multi-stage floating compensation mechanism, which can automatically absorb and adapt to the thickness tolerance and position deviation of the battery cell stack, ensuring that a uniform and reliable compression force can be applied at each welding point, ensuring the uniform fit of the tab 91 and the pole 92, improving the consistency of the welding quality, and enhancing the stability of the compression process and the welding quality.

[0055] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.

Claims

1. A battery cell tab pressing device, characterized in that: It includes a fixed seat, a moving component, a floating component, a mounting base, a copper nozzle and a pre-stressing stabilization component. The moving component is fixed to the fixed seat and is used to drive the floating component to move relative to the fixed seat. The floating component is located between the moving component and the mounting base; the copper nozzle and the pre-stressing stabilization component are both installed on the mounting base. The pre-stressing stabilization component includes a first elastic member and an insulating support block. The two ends of the first elastic member respectively abut the insulating support block and the mounting base. The end face of the insulating support block away from the mounting base is flush with the end face of the copper nozzle away from the mounting base.

2. The battery cell tab pressing device according to claim 1, characterized in that: The mounting base includes an outer frame, a floating matching frame and a mounting platform. The inner and outer sides of the floating matching frame are respectively connected to the mounting platform and the outer frame. The floating component is matched with the floating matching frame. The mounting platform is connected to the copper nozzle and the pre-compression stabilization component.

3. The battery cell tab pressing device according to claim 2, characterized in that: The mounting platform includes a base, two copper nozzle mounting positions protruding from the base to a side away from the floating component, and two support block mounting positions protruding from the copper nozzle mounting positions to the left and right sides respectively; the copper nozzles are installed in both copper nozzle mounting positions, and the pre-compression stabilization component is installed in one of the two support block mounting positions.

4. The battery cell tab pressing device according to claim 3, characterized in that: The pre-compression stabilization assembly also includes a first guide rod, one end of which is fixed to the support block mounting position, the first guide rod passes through the insulating support block and is movable relative to the insulating support block, and the first elastic member is sleeved outside the first guide rod.

5. The battery cell tab pressing device according to claim 2, characterized in that: The movable component, the mounting platform and the copper nozzle are provided with a penetrating light outlet channel. The battery cell bar pressing device also includes a shielding cover, which is located between the movable component and the mounting base, and the shielding cover is located between the light outlet channel and the floating component.

6. The battery cell tab pressing device according to claim 5, characterized in that: One end of the shielding cover is fixed to the inner wall of the floating matching frame, and the other end of the shielding cover is in close contact with the inner wall of the moving component.

7. The battery cell tab pressing device according to claim 1, characterized in that: The mobile assembly includes a driving member, a connecting member and a mobile base. The driving member is fixed to the fixed base. The connecting member connects the driving member and the mobile base respectively. The mobile base is connected to the floating assembly. The driving member is used to drive the connecting member to move and drive the mobile base to move.

8. The battery cell tab pressing device according to claim 7, characterized in that: The moving assembly further comprises a guide rail and a slider that are slidably matched, the guide rail is fixed to the fixing seat, and the slider is fixed to the moving base.

9. A battery cell bar pressure system, characterized in that: It comprises at least one pair of oppositely arranged battery cell tab pressing devices as described in any one of claims 1-8.

10. The battery cell bar pressure system according to claim 9, characterized in that: Each of the battery cell tab pressing devices includes two copper nozzles and one pre-pressing stabilization component, and the two copper nozzles are respectively a first copper nozzle and a second copper nozzle; along the first direction, the arrangement order of the copper nozzles and the pre-pressing stabilization component on one side is: first copper nozzle, second copper nozzle, pre-pressing stabilization component; the arrangement order of the copper nozzles and the pre-pressing stabilization component on the other side is: pre-pressing stabilization component, first copper nozzle, second copper nozzle.

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