A rotating stacking mechanism of a battery cell module and a stacking system

Abstract

The application discloses a rotating stacking mechanism and a stacking system of an electric core module. The rotating stacking mechanism comprises a fixing assembly, a rotating assembly and a clamp assembly. The fixing assembly is fixed with a first electric core. The rotating assembly is provided with a clamping part for fixing a second electric core. The tabs between the first electric core and the second electric core are welded. The clamp assembly forms a first rotation center and a second rotation center on both sides of the welding position of the tabs of the two electric cores. The rotating assembly drives the second electric core to rotate around the first rotation center and the second rotation center in turn. After twice bending, the tabs between the first electric core and the second electric core are bent into a 'F' type, and the second electric core is stacked in front of the first electric core. The rotating stacking mechanism is simple to operate, has small damage to the tabs, and has low defective product rate. Moreover, the rotating stacking mechanism reduces energy consumption. When the tabs are bent, only the electric core unit to be stacked is moved, the moving path of the electric core unit is unchanged, the operation difficulty is reduced, and the electric core unit is prevented from being knocked.

Description

Technical Field

[0001] The present invention relates to the field of lithium battery production, and particularly to a rotating stacking mechanism and a stacking system for a battery cell module. Background Art

[0002] As is well known, a soft-pack battery cell refers to a lithium battery with a soft packaging material (usually an aluminum-plastic composite film) as its outer shell, which has various advantages such as small volume, light weight, high specific energy, high safety, and flexible design. The soft-pack battery cell is packaged with an aluminum-plastic film in terms of structure, and the positive and negative electrodes of the battery also adopt the battery tab structure, which is different from the usual plastic-shell and metal-shell batteries.

[0003] Due to the soft shape of the soft-pack battery cell, it is not easy to fix, and it is very easy to出现划痕、凹坑、褶痕等情况, so it is a rather difficult problem to fix multiple soft-pack battery cells to each other and connect multiple soft-pack power batteries in series and parallel to form a soft-pack battery module.

[0004] The production of a battery cell module requires first forming a battery cell unit by connecting two soft-pack battery cells in parallel, and then connecting the tabs between adjacent two battery cell units in series after welding. In order to facilitate the stacking of battery cell units, the welded tabs are bent into a "C" shape. In the prior art, the tabs are generally bent by stamping, and each time the battery cell units on both sides need to move along with it. One side of the battery cell unit will bring along the previously stacked battery cell units, so the movement path of the battery cell units needs to be reset each time, resulting in the problem of cumbersome operation. Summary of the Invention

[0005] The purpose of the present invention is to provide a rotating stacking mechanism for a battery cell module to solve the problem of cumbersome operation in the production process of the battery cell module in the prior art.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A rotating stacking mechanism for a battery cell module includes a fixing component, a rotating component, and a clamping component, where:

[0008] A first battery cell is fixed on the fixing component,

[0009] A clamping part for fixing a second battery cell is arranged on the rotating component, and the overlapping part of the tabs between the first battery cell and the second battery cell is welded together,

[0010] The clamping component is configured to clamp and fix the tabs between the first battery cell and the second battery cell to respectively form a first rotation center and a second rotation center on both sides of the welding joint of the tabs,

[0011] It should be noted that there are some Chinese characters in the original text that seem to be incorrect or incomplete in the "出现划痕、凹坑、褶痕等情况" part. I translated it as best as possible based on the context. If this is an error in the original, it may need to be corrected for a more accurate translation.The rotating component drives the second battery cell to rotate around the first rotation center and the second rotation center in sequence. After two bends, the tabs between the first battery cell and the second battery cell are bent into a "C" shape, and the second battery cell is stacked in front of the first battery cell.

[0012] The first rotation center and the second rotation center are formed on both sides of the welding joint of the tabs of the first battery cell and the second battery cell through the fixture component. The rotating component drives the second battery cell to rotate around the first rotation center and the second rotation center in sequence, so that the tabs between the first battery cell and the second battery cell are bent into a "C" shape, and the second battery cell is stacked in front of the first battery cell. It can realize the rotation and bending of the tab welding joint between two battery cell units into a "C" shape and then stacking. The rotation and stacking mechanism of the battery cell module of the present invention uses two rotations to bend the tabs. Compared with the existing stamping type bending, the operation is simple, the damage to the tabs is small, and the defective rate is low; moreover, the method of welding first and then bending is adopted, so there is no need to worry about the rebound of the tabs after bending. Therefore, the tabs do not need to be heated during bending, reducing the energy consumption; at the same time, when bending the tabs, only the battery cell unit to be stacked needs to be moved, and the stacked battery cell units do not need to be moved. Therefore, the moving path of the battery cell unit can remain unchanged, reducing the operation difficulty and further avoiding the bruising of the battery cell unit.

[0013] In some embodiments, the fixture component includes a main bending fixture for clamping the tabs, a fixed fixture, and an auxiliary bending fixture. The fixed fixture is located between the main bending fixture and the auxiliary bending fixture. The fixed fixture presses the welding joint of the tabs. The side of the main bending fixture close to the fixed fixture serves as the first rotation center during bending, and the side of the fixed fixture close to the auxiliary bending fixture serves as the second rotation center during bending;

[0014] When the second battery cell rotates around the first rotation center, the auxiliary bending fixture and the fixed fixture rotate with the second battery cell;

[0015] When the second battery cell rotates around the second rotation center, the auxiliary bending fixture rotates with the second battery cell.

[0016] Through the cooperation of the main bending fixture, the fixed fixture, and the auxiliary bending fixture, the first rotation center and the second rotation center are formed on both sides of the welding joint of the tabs of the first battery cell and the second battery cell. When the second battery cell rotates around the first rotation center, the auxiliary bending fixture and the fixed fixture rotate with the second battery cell to achieve the first bending of the tabs between the two battery cells; when the second battery cell rotates around the second rotation center, the auxiliary bending fixture rotates with the second battery cell to achieve the second bending of the tabs between the two battery cells. It not only realizes the two bends and stacking of the second battery cell, but also provides a fixture component with a simple structure and stable and reliable clamping.

[0017] In some embodiments, the rotating assembly includes a first rotating mechanism and a second rotating mechanism disposed on the base. The first rotating mechanism is configured to synchronously drive the clamping component and the secondary bending fixture to rotate, and the second rotating mechanism is configured to drive the fixed fixture to rotate.

[0018] By coordinating the first and second rotating mechanisms, the second battery cell, the auxiliary bending fixture, and the fixing fixture can be driven to rotate synchronously around the first rotation center to achieve the first bending of the tab between the two battery cells. By synchronously driving the clamping component and the auxiliary bending fixture to rotate through the first rotating mechanism, the second battery cell and the auxiliary bending fixture can be driven to rotate synchronously around the second rotation center to achieve the second bending of the tab between the two battery cells.

[0019] In some embodiments, a rotary drive device is provided on the base to drive the first rotary mechanism to rotate, and the first rotary mechanism and the second rotary mechanism can be detachably connected by a connecting component.

[0020] When the connecting components are fixed, the first rotating mechanism and the second rotating mechanism rotate synchronously around the first rotation center;

[0021] When the connecting components are separated, the first rotating mechanism rotates independently around the second rotation center.

[0022] By configuring a first rotating mechanism, a second rotating mechanism, and a connecting assembly, the first and second rotating mechanisms are detachably connected. This allows a single rotating drive device to simultaneously drive both mechanisms to rotate around a first rotation center, enabling the second battery cell, the auxiliary bending fixture, and the fixing fixture to rotate synchronously around the first rotation center, achieving the first bending of the tab between the two battery cells. Simultaneously, the first rotating mechanism can be driven to rotate independently around a second rotation center, enabling the second battery cell and the auxiliary bending fixture to rotate synchronously around the second rotation center, achieving the second bending of the tab between the two battery cells. This provides a rotating assembly with a simple structure, low cost, and stable and reliable operation.

[0023] In some embodiments, the connecting assembly includes a limiting drive device, a limiting rod, and a guide plate. The limiting drive device is fixed to the second rotating mechanism, the limiting rod is connected to the output end of the first limiting drive device, and the guide plate is fixed to the first rotating mechanism.

[0024] The limit drive device drives the limit rod to clamp the guide plate onto the second rotating mechanism, so that the first rotating mechanism and the second rotating mechanism remain relatively stationary.

[0025] The limit drive device can also drive the limit rod to release the guide plate and disengage from the movement path of the first rotating mechanism.

[0026] By cooperating with the limit drive device, the limit rod, and the guide plate, the relative fixation or separation of the first and second rotating mechanisms can be achieved. A simple, stable, and reliable connecting assembly is provided.

[0027] In some embodiments, the first rotating mechanism includes a first rotating plate and a first rotating shaft, a clamping component and a secondary bending fixture are disposed on the first rotating plate, and the axis of the first rotating shaft is collinear with the second rotation center. The second rotating mechanism includes a second rotating plate and a second rotating shaft, a fixing fixture is disposed on the second rotating plate, and the axis of the second rotating shaft is collinear with the first rotation center. The first rotating shaft is rotatably connected to a first end of the second rotating plate, and the second rotating shaft is rotatably connected to a second end of the second rotating plate. The second rotating shaft is mounted on a base.

[0028] When the second cell rotates around the first rotation center, the positions of the first rotating plate and the second rotating plate are relatively fixed, and when the second cell rotates around the second rotation center, the positions of the second rotating plate and the base are relatively fixed.

[0029] By setting up a first rotating plate, a first rotating shaft, a second rotating plate, and a second rotating shaft, when the second battery cell rotates around the first rotation center, the positions of the first rotating plate and the second rotating plate are relatively fixed. The second battery cell, the auxiliary bending fixture, and the fixing fixture rotate synchronously around the second rotating shaft to achieve the first bending of the tab between the two battery cells. When the second battery cell rotates around the second rotation center, the positions of the second rotating plate and the base are relatively fixed. The second battery cell and the auxiliary bending fixture rotate synchronously around the first rotating shaft to achieve the second bending of the tab between the two battery cells.

[0030] In some embodiments, a limiting component is provided between the second rotating plate and the base. The limiting component includes a limiting drive member mounted on the base and a positioning hole opened on the second rotating plate. After the second cell rotates to the position around the first rotation center, the output end of the limiting drive member is inserted into the positioning hole.

[0031] By setting a limiting component between the second rotating plate and the base, the second battery cell, after rotating into position around the first rotation center, fixes the relative positions of the second rotating plate and the base. This provides a limiting component with a simple structure and easy implementation.

[0032] In some embodiments, the rotary drive device drives the first rotary mechanism to rotate through a transmission assembly. A rotary path groove is provided on the base. The transmission assembly includes a rotary arm, an extension rod, and a follower wheel. The rotary arm has an oblong follower groove along its own length. The first end of the extension rod is fixed to the first rotary plate, and the second end passes through the rotary path groove. The follower wheel is installed at the second end of the extension rod and is located in the follower groove. The rotary drive device drives the rotary arm to rotate.

[0033] By creating a rotation path groove on the base, the rotary drive device drives the first rotary plate to rotate via a transmission assembly consisting of a rotating arm, an extension rod, and a follower wheel. This provides a transmission assembly that is simple in structure, has an accurate transmission ratio, and is stable and reliable in operation; at the same time, the follower groove is designed in an oblong shape, allowing the follower wheel to move within the groove and preventing it from getting stuck during rotation.

[0034] In some embodiments, an arc-shaped slide rail concentric with the rotary path groove is provided on the base, and a rotary slide block connected to the first rotary plate is slidably connected on the arc-shaped slide rail.

[0035] By setting up an arc-shaped slide rail and a rotary slide block, the rotary slide block supports the first rotary plate, which can improve the rotation accuracy and reduce the load on the rotary drive device.

[0036] A rotary stacking system for battery cell modules includes at least one operating station, a welding mechanism, and a feeding mechanism. The operating station is equipped with a receiving mechanism and two rotary stacking mechanisms, which are symmetrically arranged relative to the receiving mechanism.

[0037] The welding mechanism is used to weld the parts of the battery cell units to be welded at the operating station;

[0038] The feeding mechanism is used to deliver the battery cell units to the operating station;

[0039] The rotating stacking mechanism adopts the rotating stacking mechanism of the battery cell module. The two rotating stacking mechanisms share a fixed component. One rotating stacking mechanism is used to rotate and stack the welded nth battery cell in front of the (n-1)th battery cell, and the other rotating stacking mechanism is used to rotate and stack the welded (n+1)th battery cell in front of the nth battery cell, where n is a positive even number.

[0040] The receiving mechanism is used to carry the stacked battery cells.

[0041] By coordinating a feeding mechanism, a welding mechanism, a receiving mechanism, and two rotating stacking mechanisms, a production method can be achieved that automates the sequential series bending and stacking of multiple battery cell units. The movement of the battery cell units is achieved through mechanical components along preset paths, ensuring that the battery cell units do not suffer from scratches, dents, creases, or other defects. This provides a battery cell module stacking equipment that is highly efficient, labor-saving, easy to operate, and does not damage the battery cell units. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the existing battery cell unit structure;

[0043] Figure 2 This is a schematic diagram of the structure of an existing battery cell module;

[0044] Figure 3This is a three-dimensional structural diagram of the rotating stacking mechanism of the battery cell module provided in an embodiment of the present invention;

[0045] Figure 4 This is a first-view structural schematic diagram of the rotating component of the rotating stacking mechanism of the battery cell module in an embodiment of the present invention.

[0046] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle;

[0047] Figure 6 This is a second-view structural schematic diagram of the rotating component of the rotating stacking mechanism of the battery cell module in an embodiment of the present invention.

[0048] Figure 7 yes Figure 6 A magnified view of a portion of point B in the middle;

[0049] Figure 8 This is a schematic diagram of the driving method of the rotating component of the rotating stacking mechanism of the battery cell module in an embodiment of the present invention;

[0050] Figure 9 This is a three-dimensional structural diagram of the rotating stacking system of the battery cell module in an embodiment of the present invention.

[0051] Figures 1 to 9 The following reference numerals are included:

[0052] Battery cell module 10: battery cell unit 11, first battery cell 110, second battery cell 111, third battery cell 112, electrode tab 12;

[0053] Fixed component 20;

[0054] Rotating assembly 30: clamping component 31, first rotating mechanism 32, first rotating plate 320, first rotating shaft 321, second positioning hole 322, second rotating mechanism 33, second rotating plate 330, second rotating shaft 331, first positioning hole 332, connecting assembly 34, limit drive device 340, limit rod 341, guide plate 342;

[0055] Fixture assembly 40: main bending fixture 41, fixing fixture 42, auxiliary bending fixture 43;

[0056] Base 50: Rotary drive device 51, first limit drive component 52, second limit drive component 53, rotary path groove 54, rotating arm 55, follower groove 550, extension rod 56, follower wheel 57, arc-shaped slide rail 58, rotary slide block 59;

[0057] Lifting component 60;

[0058] Receiving mechanism 70;

[0059] The first rotating stacking mechanism 80 and the second rotating stacking mechanism 81. Detailed implementation mode

[0060] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific implementation modes.

[0061] Please refer to Figure 1 and Figure 2 As shown, to fabricate the battery cell module 10 of this embodiment, two soft-pack battery cells need to be connected in parallel to form a battery cell unit 11 first, and then the tabs 12 between adjacent two battery cell units 11 are welded and connected in series to form the battery cell module 10. To facilitate the stacking of the battery cell units 11, the welded tabs 12 are bent into a "C" shape. The traditional process uses a stamping method to bend the tabs, and each time both sides of the battery cell units 11 need to move along. One side of the battery cell units 11 will bring along the previously stacked battery cell units 11. Therefore, the moving path of the battery cell units 11 needs to be reset each time, resulting in a cumbersome operation.

[0062] Therefore, the present invention provides a rotating stacking mechanism for a battery cell module, which is used to rotate and bend the welded part of the tabs between two battery cell units into a "C" shape and then stack them. Please refer to Figure 3 As shown, a rotating stacking mechanism for a battery cell module provided by an embodiment of the present invention includes a fixing component 20, a rotating component 30, and a clamping component 40. A first battery cell 110 is fixed on the fixing component 20, and a clamping part 31 for fixing a second battery cell 111 is arranged on the rotating component 30. The overlapping parts of the tabs between the first battery cell 110 and the second battery cell 111 are welded. The clamping component 40 is configured to clamp and fix the tabs between the first battery cell 110 and the second battery cell 111, so as to form a first rotation center and a second rotation center on both sides of the welded part of the tabs respectively. The rotating component 30 drives the second battery cell 111 to rotate around the first rotation center and the second rotation center respectively. After two bends, the tabs between the first battery cell 110 and the second battery cell 111 are bent into a "C" shape and the second battery cell 111 is stacked in front of the first battery cell 110.

[0063] It can be seen that by the clamping component 40 forming a first rotation center and a second rotation center on both sides of the welded part of the tabs of the first battery cell 110 and the second battery cell 111, and by the rotating component 30 driving the second battery cell 111 to rotate around the first rotation center and the second rotation center in sequence, the tabs between the first battery cell 110 and the second battery cell 111 are bent into a "C" shape and the second battery cell 111 is stacked in front of the first battery cell 110, thus realizing the rotation and bending of the welded part of the tabs between two battery cell units into a "C" shape and then stacking.

[0064] Please refer to Figure 4 and Figure 5 As shown, optionally, the clamp assembly 40 includes a main bending clamp 41, a fixing clamp 42, and a secondary bending clamp 43 for clamping the electrode tabs. The fixing clamp 42 is located between the main bending clamp 41 and the secondary bending clamp 43, and the fixing clamp 42 presses against the welded joint of the electrode tabs. The side of the main bending clamp 41 near the fixing clamp 42 serves as the first rotation center during bending, and the side of the fixing clamp 42 near the secondary bending clamp 43 serves as the second rotation center during bending. When the second battery cell 111 rotates around the first rotation center, the secondary bending clamp 43 and the fixing clamp 42 rotate with the second battery cell 111. When the second battery cell 111 rotates around the second rotation center, the secondary bending clamp 43 rotates with the second battery cell 111.

[0065] The main bending fixture 41, the fixed fixture 42, and the auxiliary bending fixture 43 are all composed of a driving component and two relatively movable jaws. The driving component drives the two jaws to move synchronously towards each other, realizing the clamping and releasing actions. The driving component can be a common device such as a motor or a cylinder.

[0066] As can be seen, through the cooperation of the main bending fixture 41, the fixing fixture 42, and the auxiliary bending fixture 43, a first rotation center and a second rotation center are formed on both sides of the welding point of the tabs of the first battery cell 110 and the second battery cell 111. This allows the auxiliary bending fixture 43 and the fixing fixture 42 to rotate with the second battery cell 111 when the second battery cell 111 rotates around the first rotation center, achieving the first bending of the tabs between the two battery cells. When the second battery cell 111 rotates around the second rotation center, the auxiliary bending fixture 43 to rotate with the second battery cell 111, achieving the second bending of the tabs between the two battery cells. This achieves both bending and stacking of the second battery cell 111, while also providing a simple and reliable fixture assembly to ensure the stability and reliability of the second battery cell 111 during bending and stacking.

[0067] Optionally, the main bending fixture 41 is located above the fixed fixture 42 and the secondary bending fixture 43. The main bending fixture 41 is configured to hold the side of the electrode tab weld between the first battery cell 110 and the second battery cell 111 closer to the first battery cell 110. The main bending fixture 41 can be raised and lowered via a linear guide rail, which is a conventional technique in the art and will not be described in detail here.

[0068] As can be seen, by setting the main bending jig 41 above the fixed jig 42 and the auxiliary bending jig 43, it is ensured that the main bending jig 41, the fixed jig 42 and the auxiliary bending jig 43 can smoothly clamp and fix the tabs between the first battery cell 110 and the second battery cell 111, making full use of the peripheral space of the tabs between the first battery cell 110 and the second battery cell 111, and the layout is reasonable; at the same time, the clamping position of the main bending jig 41 is on the side of the welding point of the tabs closer to the first battery cell 110, so that the side of the main bending jig 41 close to the fixed jig 42 serves as the first rotation center during bending.

[0069] Optionally, the rotating assembly 30 includes a first rotating mechanism 32 and a second rotating mechanism 33 disposed on the base 50. The first rotating mechanism 32 is configured to synchronously drive the clamping component 31 and the secondary bending fixture 43 to rotate, and the second rotating mechanism 33 is configured to drive the fixed fixture 42 to rotate.

[0070] As can be seen, through the cooperation of the first rotating mechanism 32 and the second rotating mechanism 33, the second battery cell 111, the auxiliary bending fixture 43 and the fixing fixture 42 can be driven to rotate synchronously around the first rotating center to achieve the first bending of the tab between the two battery cells. By driving the clamping component 31 and the auxiliary bending fixture 43 to rotate synchronously through the first rotating mechanism 32, the second battery cell 111 and the auxiliary bending fixture 43 can be driven to rotate synchronously around the second rotating center to achieve the second bending of the tab between the two battery cells.

[0071] Please see Figure 6 and Figure 7 As shown, optionally, a rotation drive device 51 for driving the first rotation mechanism 32 to rotate is provided on the base 50. The first rotation mechanism 32 and the second rotation mechanism 33 are detachably connected by a connecting component 34. When the connecting component 34 is fixed, the first rotation mechanism 32 and the second rotation mechanism 33 rotate synchronously around the first rotation center; when the connecting component 34 is separated, the first rotation mechanism 32 rotates alone around the second rotation center.

[0072] As can be seen, by setting up the first rotating mechanism 32, the second rotating mechanism 33, and the connecting assembly 34, the first rotating mechanism 32 and the second rotating mechanism 33 are detachably connected. This allows a single rotating drive device 51 to drive the first rotating mechanism 32 and the second rotating mechanism 33 to rotate synchronously around the first rotation center, so that the second battery cell 111, the auxiliary bending fixture 43, and the fixing fixture 42 rotate synchronously around the first rotation center, achieving the first bending of the tab between the two battery cells. Simultaneously, the device can drive the first rotating mechanism 32 to rotate independently around the second rotation center, so that the second battery cell 111 and the auxiliary bending fixture 43 rotate synchronously around the second rotation center, achieving the second bending of the tab between the two battery cells. The rotating assembly 30 has a simple overall structure, low cost, and stable and reliable operation.

[0073] Optionally, the first rotating mechanism 32 includes a first rotating plate 320 and a first rotating shaft 321. The clamping component 31 and the auxiliary bending fixture 43 are disposed on the first rotating plate 320. The axis of the first rotating shaft 321 is collinear with the second rotation center. The second rotating mechanism 33 includes a second rotating plate 330 and a second rotating shaft 331. The fixing fixture 42 is disposed on the second rotating plate 330. The axis of the second rotating shaft 331 is collinear with the first rotation center. The first rotating shaft 321 is rotatably connected to the first end of the second rotating plate 330, and the second rotating shaft 331 is rotatably connected to the second end of the second rotating plate 330. The second rotating shaft 331 is mounted on the base 50. When the second battery cell 111 rotates around the first rotation center, the positions of the first rotating plate 320 and the second rotating plate 330 are relatively fixed. When the second battery cell 111 rotates around the second rotation center, the positions of the second rotating plate 330 and the base 50 are relatively fixed.

[0074] As can be seen, by setting the first rotating plate 320, the first rotating shaft 321, the second rotating plate 330, and the second rotating shaft 331, when the second battery cell 111 rotates around the first rotation center, the positions of the first rotating plate 320 and the second rotating plate 330 are relatively fixed, and the second battery cell 111, the auxiliary bending fixture 43, and the fixing fixture 42 rotate synchronously around the second rotating shaft 331 to achieve the first bending of the tab between the two battery cells. When the second battery cell 111 rotates around the second rotation center, the positions of the second rotating plate 330 and the base 50 are relatively fixed, and the second battery cell 111 and the auxiliary bending fixture 43 rotate synchronously around the first rotating shaft 321 to achieve the second bending of the tab between the two battery cells.

[0075] The clamping component 31 also uses pneumatic grippers to clamp or release the battery cell. The first rotary plate 320 is also equipped with a cylinder that drives the clamping component 31 to slide along the conveying direction of the conveying component 22, so as to realize the synchronous advancement of the clamping component 31 and the conveying component 22.

[0076] Optionally, the connecting assembly 34 includes a limiting drive device 340, a limiting rod 341, and a guide plate 342. The limiting drive device 340 is fixed on the second rotating plate 330, the limiting rod 341 is connected to the output end of the limiting drive device 340, and the guide plate 342 is fixed on the first rotating plate 320. The limiting drive device 340 drives the limiting rod 341 to clamp the guide plate 342 onto the second rotating mechanism 33, so that the first rotating mechanism 32 and the second rotating mechanism 33 remain relatively stationary. The limiting drive device 340 can also drive the limiting rod 341 to release the guide plate 342 and disengage it from the movement path of the first rotating mechanism 32.

[0077] As can be seen, the relative fixation or separation of the first rotating mechanism 32 and the second rotating mechanism 33 can be achieved through the cooperation of the limiting drive device 340, the limiting rod 341, and the guide plate 342. This provides a simple, stable, and reliable connection assembly.

[0078] Optionally, a first limiting component is provided between the second rotating plate 330 and the base 50. The first limiting component includes a first limiting drive 52 installed on the base 50 and a first positioning hole 332 opened on the second rotating plate 330. After the second battery cell 111 rotates to the position around the first rotation center, the output end of the first limiting drive 52 is inserted into the first positioning hole 332.

[0079] As can be seen, by setting a first limiting component between the second rotating plate 330 and the base 50, after the second cell 111 rotates to the position around the first rotation center, the output end of the first limiting drive 52 is inserted into the first positioning hole 332 to fix the relative positions of the second rotating plate 330 and the base 50.

[0080] Optionally, a second limiting component is provided between the first rotating plate 320 and the base 50. The second limiting component includes a second limiting drive 53 mounted on the base 50 and a second positioning hole 322 opened on the first rotating plate 320. After the second battery cell 111 rotates to the position around the second rotation center, the output end of the second limiting drive 53 is inserted into the second positioning hole 322.

[0081] As can be seen, by setting a second limiting component between the first rotating plate 320 and the base 50, after the second cell 111 rotates to the position around the second rotation center, the output end of the second limiting drive 53 is inserted into the second positioning hole 322 to fix the positions of the first rotating plate 320 and the base 50 relative to each other, so as to fix the entire rotating assembly 30 and prevent the rotating assembly 30 from affecting the subsequent electrode welding work.

[0082] Please see Figure 4 , Figure 6 and Figure 8 As shown, optionally, the rotary drive device 51 drives the first rotary mechanism 32 to rotate via a transmission assembly. A rotary path groove 54 is provided on the base 50. The transmission assembly includes a rotary arm 55, an extension rod 56, and a follower wheel 57. The rotary arm 55 has an oblong follower groove 550 along its length. The first end of the extension rod 56 is fixed to the first rotary plate 320, and the second end passes through the rotary path groove 54. The follower wheel 57 is installed at the second end of the extension rod 56 and is located in the follower groove 550. The rotary drive device 51 drives the rotary arm 55 to rotate.

[0083] As can be seen, by opening a rotation path groove 54 on the base 50, the rotary drive device 51 drives the first rotary plate 320 to rotate through a transmission assembly consisting of a rotating arm 55, an extension rod 56, and a follower wheel 57. This provides a transmission assembly with a simple structure, accurate transmission ratio, and stable and reliable operation; at the same time, the follower groove 550 is set in an oblong shape, allowing the follower wheel 57 to move within the follower groove 550, preventing it from getting stuck during rotation.

[0084] Optionally, the base 50 is provided with an arc-shaped slide rail 58 concentric with the rotary path groove 54, and a rotary slide block 59 connected to the first rotary plate 320 is slidably connected to the arc-shaped slide rail 58.

[0085] It can be seen that by setting the arc-shaped slide rail 58 and the rotary slide block 59, the rotary slide block 59 supports the first rotary plate 320, which can improve the rotation accuracy and reduce the load on the rotary drive device 51.

[0086] Please refer to it again. Figure 3 As shown, optionally, the main bending fixture 41, the fixed fixture 42, and the secondary bending fixture 43 are all connected to a lifting component 60, which drives the main bending fixture 41, the fixed fixture 42, and the secondary bending fixture 43 to perform lifting actions.

[0087] As can be seen, the lifting component 60 drives the main bending fixture 41, the fixing fixture 42, and the auxiliary bending fixture 43 to rise and fall respectively. When the second battery cell 111 is being fed and welded to the tab of the first battery cell 110, the auxiliary bending fixture 43 and the fixing fixture 42 descend, while the main bending fixture 41 rises to avoid obstruction. After the second battery cell 111 is fed and welded to the tab of the first battery cell 110, the auxiliary bending fixture 43 and the fixing fixture 42 rise, while the main bending fixture 41 descends to clamp and fix the tab between the first battery cell 110 and the second battery cell 111.

[0088] The working process of the rotating stacking mechanism for battery cell modules provided by this invention is as follows:

[0089] The first battery cell 110 is fixed on the fixing component 20;

[0090] The second battery cell 111 is fixed on the clamping component 31;

[0091] Weld the overlapping tabs between the first battery cell 110 and the second battery cell 111 together;

[0092] The main bending fixture 41, the fixing fixture 42, and the auxiliary bending fixture 43 clamp and fix the electrode tab welding joint between the first battery cell 110 and the second battery cell 111 to form the first rotation center and the second rotation center.

[0093] The connecting component 34 relatively fixes the positions of the first rotating mechanism 32 and the second rotating mechanism 33. The rotation driving device 51 drives the first rotating mechanism 32 and the second rotating mechanism 33 to rotate synchronously, so as to drive the second battery cell 111, the auxiliary bending fixture 43 and the fixing fixture 42 to rotate synchronously by 90° around the first rotation center, and bend the ear welding part between the first battery cell 110 and the second battery cell 111 into an "L" shape.

[0094] After the second battery cell 111 rotates to the position around the first rotation center, the output end of the first limit driving device 52 is inserted into the first positioning hole 332 to relatively fix the positions of the second rotating mechanism 33 and the base 50.

[0095] The rotation driving device 51 then drives the first rotating mechanism 32 to rotate, so as to drive the second battery cell 111 and the auxiliary bending fixture 43 to rotate synchronously by 90° around the second rotation center, bend the ear welding part between the first battery cell 110 and the second battery cell 111 into a "匚" shape and stack the second battery cell 111 in front of the first battery cell 110.

[0096] The present invention provides a rotating stacking mechanism for a battery cell module, which has the following advantages:

[0097] 1) By using secondary rotation to bend the ears, compared with the existing stamping type bending, the operation is simple, the damage to the ears is small, and the defective rate is low;

[0098] 2) By adopting the method of welding first and then bending, there is no need to worry about the rebound of the ears after bending. Therefore, the ears do not need to be heated during bending, reducing the energy consumption;

[0099] 3) When bending the ears, only the battery cell units to be stacked need to be moved, and the stacked battery cell units do not need to be moved. Therefore, the moving path of the battery cell units can remain unchanged, reducing the operation difficulty and further avoiding knocking damage to the battery cell units;

[0100] 4) The two rotating mechanisms share one rotation driving device, which simplifies the overall structure, makes the structure compact and occupies a small space.

[0101] Please refer to Figure 3 and Figure 9As shown in the figure, the present invention provides a rotary stacking system for a battery cell module, which is used to automatically weld and stack multiple battery cells to form a battery cell module. The rotary stacking system for the battery cell module includes at least one operating station, a welding mechanism, and a feeding mechanism. A receiving mechanism 70, a first rotary stacking mechanism 80, and a second rotary stacking mechanism 81 are arranged on the operating station. The first rotary stacking mechanism 80 and the second rotary stacking mechanism 81 are symmetrically arranged relative to the receiving mechanism 70, where: The welding mechanism is used to weld the weldable parts of the battery cells on the operating station; The feeding mechanism is used to send the battery cells to the operating station; Both the first rotary stacking mechanism 80 and the second rotary stacking mechanism 81 adopt the rotary stacking mechanism of the battery cell module. The first rotary stacking mechanism 80 and the second rotary stacking mechanism 81 share a fixed component 20. The first rotary stacking mechanism 80 is used to rotatably stack the nth battery cell after welding in front of the (n - 1)th battery cell, and the second rotary stacking mechanism 81 is used to rotatably stack the (n + 1)th battery cell after welding in front of the nth battery cell, where n is a positive even number; The receiving mechanism 70 is used to carry and convey the stacked battery cells.

[0102] To facilitate understanding of the rotary stacking system for the battery cell module provided by the present invention, the specific rotary stacking process of the first battery cell 110, the second battery cell 111, and the third battery cell 112 is illustrated as follows:

[0103] The feeding mechanism feeds the first battery cell 110, the second battery cell 111, and the third battery cell 112 onto the fixed component 20, the clamping component 31 of the first rotary stacking mechanism 80, and the clamping component 31 of the second rotary stacking mechanism 81 respectively. The first battery cell 110 is in the position to be stacked;

[0104] The welding mechanism welds the overlapping part of the tabs between the first battery cell 110 and the second battery cell 111;

[0105] The fixture assembly 40 clamps and fixes the welded part of the tabs between the first battery cell 110 and the second battery cell 111 to form a first rotation center and a second rotation center;

[0106] The first rotary stacking mechanism 80 drives the second battery cell 111 to rotate around the first rotation center and the second rotation center on the same side. After two rotations and bends, the welded part of the tabs between the first battery cell 110 and the second battery cell 111 is bent into a "匚" shape and the second battery cell 111 is stacked in front of the first battery cell 110;

[0107] The fixture assembly 40 releases the second battery cell 111. The receiving mechanism 70 carries the stacked first battery cell 110 and second battery cell 111. The receiving mechanism 70 cooperates with the fixed component 20 to move the stacked first battery cell 110 and second battery cell 111 forward by a material distance (i.e., the thickness of one battery cell unit) along the conveying direction of the receiving mechanism 70. At this time, the second battery cell 111 is in the position to be stacked;

[0108] The welding mechanism welds the overlapping part of the tabs between the second battery cell 111 and the third battery cell 112;

[0109] The fixture assembly 40 clamps and fixes the welded part of the tabs between the second battery cell 111 and the third battery cell 112 to form a first rotation center and a second rotation center;

[0110] The second rotation and stacking mechanism 81 drives the third battery cell 112 to rotate around the first rotation center and the second rotation center on the same side. After two rotations and bends, the welded part of the tabs between the third battery cell 112 and the second battery cell 111 is bent into a "C" shape and the third battery cell 112 is stacked in front of the second battery cell 111.

[0111] It can be seen that through the feeding mechanism continuously feeding the first rotation and stacking mechanism 80 and the second rotation and stacking mechanism 81, after the welding mechanism welds the tabs between two battery cell units, the first rotation and stacking mechanism 80 and the second rotation and stacking mechanism 81 alternately perform rotation and stacking operations until the number of battery cell units in the battery cell module reaches the specified number. The sequential automatic series bending and stacking of multiple battery cell units is achieved.

[0112] The rotation and stacking system provided by the present invention can achieve the production method of sequentially automatically series bending and stacking multiple battery cell units through the cooperation of the feeding mechanism, the welding mechanism, the material receiving mechanism 70 and the two rotation and stacking mechanisms. The movement of the battery cell units is all through mechanical components with preset paths, ensuring that there will be no scratches, pits, creases, etc. on the battery cell units. A battery cell module stacking system with high working efficiency, simple operation, labor saving and no damage to the battery cell units is provided.

[0113] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above examples. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotating stacking mechanism for battery cell modules, characterized in that, It includes a fixed component, a rotating component and a fixture component, where: A first battery cell is fixed on the fixed component. A clamping component for fixing a second battery cell is provided on the rotating component. The tabs at the overlapping part between the first battery cell and the second battery cell are welded together. The fixture component is configured to clamp and fix the tabs between the first battery cell and the second battery cell, so as to form a first rotation center and a second rotation center on both sides of the welding joint of the tabs respectively. The rotating component drives the second battery cell to rotate around the first rotation center and the second rotation center in sequence. After two bends, the tabs between the first battery cell and the second battery cell are bent into a "C" shape and the second battery cell is stacked in front of the first battery cell.

2. The rotating stacking mechanism for the battery cell module according to claim 1, characterized in that, The fixture component includes a main bending fixture, a fixed fixture and a sub-bending fixture for clamping the tabs. The fixed fixture is located between the main bending fixture and the sub-bending fixture. The fixed fixture presses the welding joint of the tabs. The side of the main bending fixture close to the fixed fixture serves as the first rotation center during bending. The side of the fixed fixture close to the sub-bending fixture serves as the second rotation center during bending. When the second battery cell rotates around the first rotation center, the sub-bending fixture and the fixed fixture rotate with the second battery cell. When the second battery cell rotates around the second rotation center, the sub-bending fixture rotates with the second battery cell.

3. The rotating stacking mechanism for the battery cell module according to claim 2, characterized in that, The rotating component includes a first rotating mechanism and a second rotating mechanism arranged on a base. The first rotating mechanism is configured to synchronously drive the clamping component and the sub-bending fixture to rotate. The second rotating mechanism is configured to drive the fixed fixture to rotate.

4. The rotating stacking mechanism for the battery cell module according to claim 3, characterized in that, A rotation driving device for driving the first rotating mechanism to rotate is provided on the base. The first rotating mechanism and the second rotating mechanism are detachably connected through a connecting component. When the connecting component is fixed, the first rotating mechanism and the second rotating mechanism rotate synchronously around the first rotation center. When the connecting component is separated, the first rotating mechanism rotates alone around the second rotation center.

5. The rotating stacking mechanism for the battery cell module according to claim 4, characterized in that, The connecting component includes a limit driving device, a limit rod and a guide plate. The limit driving device is fixed on the second rotating mechanism. The limit rod is connected to the output end of the limit driving device. The guide plate is fixed on the first rotating mechanism. The limit driving device drives the limit rod to clamp the guide plate on the second rotating mechanism, so that the first rotating mechanism and the second rotating mechanism remain relatively stationary. The limit driving device can also drive the limit rod to loosen the guide plate and move out of the moving path of the first rotating mechanism.

6. The rotating stacking mechanism for the battery cell module according to claim 4, characterized in that, The first rotating mechanism includes a first rotating plate and a first rotating shaft. The clamping component and the auxiliary bending fixture are disposed on the first rotating plate. The axis of the first rotating shaft is collinear with the second rotation center. The second rotating mechanism includes a second rotating plate and a second rotating shaft. The fixing fixture is disposed on the second rotating plate. The axis of the second rotating shaft is collinear with the first rotation center. The first rotating shaft is rotatably connected to the first end of the second rotating plate. The second rotating shaft is rotatably connected to the second end of the second rotating plate. The second rotating shaft is mounted on a base. When the second cell rotates around the first rotation center, the positions of the first rotating plate and the second rotating plate are relatively fixed, and when the second cell rotates around the second rotation center, the positions of the second rotating plate and the base are relatively fixed.

7. The rotating stacking mechanism for the battery cell module according to claim 6, characterized in that, A limiting component is provided between the second rotating plate and the base. The limiting component includes a limiting drive member installed on the base and a positioning hole opened on the second rotating plate. After the second cell rotates to the position around the first rotation center, the output end of the limiting drive member is inserted into the positioning hole.

8. The rotating stacking mechanism for the battery cell module according to claim 6, characterized in that, The rotary drive device drives the first rotary mechanism to rotate via a transmission assembly. A rotary path groove is provided on the base. The transmission assembly includes a rotary arm, an extension rod, and a follower wheel. The rotary arm has an oblong follower groove along its length. The first end of the extension rod is fixed to the first rotary plate, and the second end passes through the rotary path groove. The follower wheel is installed at the second end of the extension rod and is located in the follower groove. The rotary drive device drives the rotary arm to rotate.

9. The rotating stacking mechanism for the battery cell module according to claim 8, characterized in that, The base is provided with an arc-shaped slide rail concentric with the rotary path groove, and a rotary slide block connected to the first rotary plate is slidably connected to the arc-shaped slide rail.

10. A rotating stacking system for battery cell modules, characterized in that, It includes at least one operating station, a welding mechanism, and a feeding mechanism. The operating station is equipped with a receiving mechanism and two rotating stacking mechanisms, which are symmetrically arranged relative to the receiving mechanism. The welding mechanism is used to weld the parts of the battery cell unit to be welded on the operating station; The feeding mechanism is used to deliver the battery cell unit to the operating station; The rotating stacking mechanism adopts a rotating stacking mechanism for a battery cell module as described in any one of claims 1-9. The two rotating stacking mechanisms share a fixed component. One of the rotating stacking mechanisms is used to rotate and stack the welded nth battery cell in front of the (n-1)th battery cell, and the other rotating stacking mechanism is used to rotate and stack the welded (n+1)th battery cell in front of the nth battery cell, where n is a positive even number. The receiving mechanism is used to carry the stacked battery cells.

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