A cold pressing mechanism and cold pressing process without transferring the battery cell

Abstract

The present invention discloses a cold pressing mechanism and a cold pressing process without transferring the battery cell. The cold pressing mechanism includes a discharging device, an adaptive cold pressing device and a conveying device. The discharging device includes a discharging clamp. The adaptive cold pressing device includes a first cold pressing block and a second cold pressing block. The conveying device includes a conveying belt. The discharging device can clamp the battery cell through its discharging clamp and rotate and move the battery cell together to the space between the first cold pressing block and the second cold pressing block in the adaptive cold pressing device. The adaptive cold pressing device can press the two jaws of the discharging clamp through its first cold pressing block and second cold pressing block, and further cold press the battery cell through the discharging clamp. This kind of cold pressing mechanism and cold pressing process without transferring the battery cell have the advantages of simple structure, convenient implementation, good cold pressing quality of the battery cell, and small wear of the discharging clamp. In practical applications, it can extend the service life of the equipment, improve the production quality and product qualification rate of the battery, and further improve the production efficiency of the production enterprise.

Description

Technical Field

[0001] The invention relates to the field of battery production, in particular to a battery core non-transfer cold pressing mechanism and a cold pressing process. Background Art

[0002] In the winding production of batteries, cold / hot pressing of battery cells is a very important production process of the fully automatic winding machine. In the prior art, after the unloading clamp takes out the wound battery cell from the winding needle of the winding equipment, the unloading clamp will transfer the bare battery cell to the cold / hot pressing device for secondary shaping for cold / hot pressing. Before cold / hot pressing, the unloading clamp needs to release the battery cell and transfer it to the cold / hot pressing device by the scraper. At the moment when the unloading clamp releases the clamp on the battery cell, the bare battery cell will immediately rebound under the action of the restoring force of its coil and make the battery cell in a relatively loose state. In the scraping process, the loose battery cell is prone to flipping and deformation, and the internal structure of the battery cell will be deformed and displaced. Furthermore, the cold / hot pressing of the deformed battery cell by the cold / hot device will cause a large displacement and size change of the battery cell ear, which is not conducive to ensuring the production accuracy of each component of the battery cell, not only seriously affecting the quality of the battery cell, but also seriously reducing the production quality and product qualification rate of the battery, greatly damaging the production efficiency of the production enterprise. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a cell non-transfer cold pressing mechanism and a cold pressing process, which solve the technical defects of the prior art that the cell is prone to looseness, large deformation of the cell, displacement changes of the cell tabs during the cold / hot pressing process, affecting the cell production quality, and reducing the quality and pass rate of battery products.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A battery cell non-transfer cold pressing mechanism comprises a discharge device, an adaptive cold pressing device and a conveying device, wherein the discharge device comprises a discharge clamp, the adaptive cold pressing device comprises a first cold pressing block and a second cold pressing block, and the conveying device comprises a conveying belt. The discharge device can clamp the battery cell through its discharge clamp and rotate and move the battery cell together with the battery cell between the first cold pressing block and the second cold pressing block in the adaptive cold pressing device. The adaptive cold pressing device can apply pressure to the two clamping claws of the discharge clamp through its first cold pressing block and the second cold pressing block and further cold press the battery cell through the discharge clamp. After the cold pressing is completed, the discharge device can rotate and convey the battery cell to the conveying belt of the conveying device through its discharge clamp.

[0006] As an improvement of the above technical solution, the unloading device includes an unloading device bottom plate and a linear drive assembly arranged on the unloading device bottom plate. A rotary drive assembly is installed at the output end of the linear drive assembly. A unloading clip drive cylinder is installed at the output end of the rotary drive assembly. The output end of the unloading clip drive cylinder is installed with the said unloading clip. The unloading clip is used to clamp the battery cell that has been wound on the winding equipment. The linear drive assembly and the rotary drive assembly can respectively drive the unloading clip to move linearly and rotationally.

[0007] As a further improvement of the above technical solution, the linear drive assembly includes a lifting guide rail, a lifting screw nut pair and a lifting drive motor installed on the unloading device bottom plate. A lifting mounting plate is installed on the lifting guide rail through a lifting guide rail seat. The nut of the lifting screw nut pair is fixedly connected to the lifting mounting plate. A driving synchronous pulley is arranged at the output end of the lifting drive motor. One end of the screw rod of the lifting screw nut pair is provided with a driven synchronous pulley. A synchronous belt is wound between the driving synchronous pulley and the driven synchronous pulley. The lifting drive motor can drive the lifting screw nut pair to rotate through the driving synchronous pulley, the driven synchronous pulley and the synchronous belt and further drive the lifting mounting plate to slide on the lifting guide rail through the lifting screw nut pair.

[0008] As a further improvement of the above technical solution, the rotary drive assembly includes a rotary motor mounting seat installed at the output end of the linear drive assembly and a rotary motor speed reducer installed on the rotary motor mounting seat. A rotary drive motor is fixedly installed at the input end of the rotary motor speed reducer. A rotary mounting plate is fixedly installed at the output end of the rotary motor speed reducer. The unloading clip drive cylinder is fixedly installed on the rotary mounting plate;

[0009] As a further improvement of the above technical solution, a unloading clip sensor is installed on the rotary mounting plate. A unloading clip induction piece is arranged on the side of one of the clip claws of the unloading clip to cooperate with the unloading clip sensor. The unloading clip sensor and the unloading clip induction piece are used to sense the opening size of the unloading clip and can send out an alarm signal. The unloading clip drive cylinder is used to drive the two clip claws of the unloading clip to open or close.

[0010] As a further improvement of the above technical solution, the adaptive cold pressing device includes a cold pressing device bottom plate and an adaptive guide rail pair arranged on the cold pressing device bottom plate. An adaptive mounting plate that can slide on the adaptive guide rail pair is installed on the adaptive guide rail pair. A first cold pressing cylinder and a second cold pressing cylinder are fixedly installed on the adaptive mounting plate. First cold pressing blocks and second cold pressing blocks are respectively installed at the output ends of the first cold pressing cylinder and the second cold pressing cylinder. The first cold pressing cylinder and the second cold pressing cylinder can respectively drive the first cold pressing block and the second cold pressing block to move towards each other and apply pressure to the battery cell.

[0011] As a further improvement of the above technical solution, two sets of preloading spring assemblies are installed on the adaptive mounting plate. Each preloading spring assembly includes a spring preloading plate installed on the adaptive mounting plate and a spring preloading column installed on the side of the bottom plate of the cold pressing device. The spring preloading plate has a through hole which is sleeved on the spring preloading column. A spring limit nut is arranged at the end of the spring preloading column. A preloading spring sleeved on the spring preloading column is arranged between the inner side wall of the spring limit nut and the outer side wall of the spring preloading plate. The spring preloading columns in the two sets of preloading spring assemblies are respectively fixed on two side walls of the bottom plate of the cold pressing device, and the two sets of preloading spring assemblies cooperate to form a centering preloading spring device.

[0012] As a further improvement of the above technical solution, a first electrode detection seat is installed on the first cold pressing block. A connecting guide post is arranged on the first electrode detection seat. A first electrode detection block is installed at the end of the connecting guide post. A compression spring sleeved on the connecting guide post is arranged between the first electrode detection block and the first electrode detection seat. A second electrode detection seat is arranged on the second cold pressing block, and a second electrode detection block is installed on the second electrode detection seat.

[0013] As a further improvement of the above technical solution, a first sensor mounting bracket is arranged on the side of the adaptive mounting plate. A first position sensor and a second position sensor are arranged on the first sensor mounting bracket. A first induction piece for cooperating with the first position sensor is arranged on the side of the first cold pressing block. A second induction piece for cooperating with the second position sensor is arranged on the side of the second cold pressing block;

[0014] As a further improvement of the above technical solution, a second sensor mounting bracket is arranged on the side wall of the bottom plate of the cold pressing device. A third position sensor is installed on the second sensor mounting bracket. A third induction piece for cooperating with the third position sensor is arranged at the bottom of the adaptive mounting plate;

[0015] As a further improvement of the above technical solution, the first cold pressing cylinder and the second cold pressing cylinder are respectively installed on the adaptive mounting plate through a first cold pressing cylinder seat and a second cold pressing cylinder seat. Waist-shaped holes for facilitating the adjustment of the installation position are opened on both the first cold pressing cylinder seat and the second cold pressing cylinder seat;

[0016] As a further improvement of the above technical solution, the adaptive guide rail pair includes an adaptive linear guide rail and an adaptive guide rail seat. The adaptive linear guide rail is fixedly installed on the bottom plate of the cold pressing device. The adaptive mounting plate is installed on the adaptive linear guide rail through the adaptive guide rail seat.

[0017] As a further improvement of the above technical solution, the conveying device further includes a conveying belt roller and a roller mounting plate. The conveying belt is wound around the conveying belt roller. Both ends of the conveying belt roller are installed on the roller mounting plate through bearings. A belt roller driving motor is installed on the side of the roller mounting plate. The belt roller driving motor is used to drive the conveying belt roller to rotate and further drive the conveying belt to operate through the conveying belt roller;

[0018] As a further improvement of the above technical solution, a scraping device is provided on one side of the conveying device where the battery cell is received, for scraping the battery cell on the unloading clamp onto the conveying belt;

[0019] As a further improvement of the above technical solution, the scraping device includes a scraping device bottom plate and a first scraping guide rail and a first scraping driving cylinder directly or indirectly installed on the scraping device bottom plate. The first scraping guide rail is provided with a scraping sliding mounting plate through a first scraping guide rail seat. The output end of the first scraping driving cylinder is connected to the scraping sliding mounting plate and can drive the scraping sliding mounting plate to slide on the first scraping guide rail;

[0020] As a further improvement of the above technical solution, a second scraping guide rail seat and a second scraping driving cylinder are provided on the scraping sliding mounting plate. A second scraping guide rail is provided on the second scraping guide rail seat. The output end of the second scraping driving cylinder is connected to the second scraping guide rail and can drive the second scraping guide rail to slide on the second scraping guide rail seat. A battery cell scraping plate seat is provided on the second scraping guide rail. A battery cell scraping plate for scraping the battery cell on the unloading clamp onto the conveying belt is provided on the battery cell scraping plate seat;

[0021] As a further improvement of the above technical solution, the first scraping guide rail and the second scraping guide rail are arranged perpendicular to each other.

[0022] The present invention also provides a cold pressing process for battery cells without transfer, including the following process steps:

[0023] S1. Ascend to clamp the battery cell. The unloading device drives its unloading clamp to ascend to the unloading position, and the unloading clamp clamps the battery cell completed by winding on the winding device;

[0024] S2. Descend the battery cell. After the unloading clamp clamps the battery cell, the unloading device drives the unloading clamp and the battery cell to descend to a preset position;

[0025] S3. Rotate the battery cell into place. The unloading device drives the unloading clamp and the battery cell to rotate a preset angle and makes the unloading clamp and the battery cell located above the space between the first cold pressing block and the second cold pressing block in the adaptive cold pressing device;

[0026] S4. The battery cell descends into the adaptive cold pressing device. The unloading device drives the unloading clamp and the battery cell to descend and enter a preset position in the adaptive cold pressing device, so that the unloading clamp clamping the battery cell is located between the first cold pressing block and the second cold pressing block in the adaptive cold pressing device.

[0027] S5. Cold pressing of the battery cell without transfer and ear short circuit test. The adaptive cold pressing device uses its first cold pressing block and second cold pressing block to cold press the unloading clamp holding the battery cell, and synchronously performs an ear short circuit test on the ears of the battery cell during the cold pressing process. During this process, the unloading clamp continuously clamps the battery cell and does not transfer the battery cell to the adaptive cold pressing device. During the cold pressing process, the adaptive cold pressing device can adaptively move to the middle cold pressing position, which is approximately the middle position between the first cold pressing block and the second cold pressing block where the unloading clamp is located, to avoid yaw between the first cold pressing block, the second cold pressing block and the unloading clamp.

[0028] S6. The adaptive cold pressing device resets. After the adaptive cold pressing device completes the cold pressing and ear short circuit test, the adaptive cold pressing device drives its first cold pressing block and second cold pressing block to retract and reset.

[0029] S7. The battery cell rises and leaves the adaptive cold pressing device. The unloading device drives the unloading clamp and the battery cell to rise to a preset position, so that the unloading clamp and the battery cell leave the cold pressing area of the adaptive cold pressing device.

[0030] S8. The battery cell rotates for unloading. The unloading device drives the unloading clamp and the battery cell to rotate a preset angle and then reach the unloading position. The unloading clamp opens and releases the clamping of the battery cell, and the battery cell on the unloading clamp is scraped onto the conveyor belt of the conveying device by the scraping device.

[0031] The beneficial effects of the present invention are as follows: The present invention provides a battery cell non-transfer cold pressing mechanism and a cold pressing process. In this battery cell non-transfer cold pressing mechanism and cold pressing process, the unloading device drives the unloading clamp to clamp the battery cell and enter the adaptive cold pressing device to complete the cold pressing of the battery cell and the ear short circuit test of the battery cell. During the cold pressing process, the unloading clamp maintains the clamping of the battery cell and does not transfer the battery cell to the adaptive cold pressing device, which can avoid situations such as looseness and deformation of the battery cell during the secondary transfer process, is beneficial to improving the consistency of battery cell production, improving the production quality of battery cells, and further improving the production quality and product qualification rate of batteries; in addition, the adaptive cold pressing device can eliminate the yaw situation during the cold pressing process of the battery cell, avoid pressure deviation on both sides of the battery cell and the unloading clamp, not only improves the force consistency on both sides of the battery cell and improves the cold pressing quality, but also avoids large impacts on the unloading clamp during the cold pressing process, reduces the wear of the unloading clamp, and protects the equipment.

[0032] In summary, the cold pressing mechanism and cold pressing process for non-transferring battery cells solve the technical defects existing in the prior art, such as the battery cells being prone to becoming loose, having large deformation, generating displacement changes in the battery cell tabs during cold / hot pressing, affecting the production quality of the battery cells, and reducing the quality and qualification rate of the battery products. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below with reference to the drawings and embodiments.

[0034] Figure 1 is the assembly schematic diagram of the present invention;

[0035] Figure 2 is another assembly schematic diagram of the present invention;

[0036] Figure 3 is the assembly schematic diagram of the present invention from a third angle;

[0037] Figure 4 is the assembly schematic diagram of the unloading device in the present invention;

[0038] Figure 5 is another assembly schematic diagram of the unloading device in the present invention;

[0039] Figure 6 is the assembly schematic diagram of the adaptive cold pressing device in the present invention;

[0040] Figure 7 is another assembly schematic diagram of the adaptive cold pressing device in the present invention;

[0041] Figure 8 is the assembly schematic diagram of the adaptive cold pressing device from a third angle in the present invention;

[0042] Figure 9 is the assembly schematic diagram of the adaptive cold pressing device in the present invention after removing the bottom plate of the cold pressing device;

[0043] Figure 10 is another assembly schematic diagram of the adaptive cold pressing device in the present invention after removing the bottom plate of the cold pressing device;

[0044] Figure 11 is the assembly schematic diagram of the conveying device and scraping device in the present invention;

[0045] Figure 12 is another assembly schematic diagram of the conveying device and scraping device in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] The concept, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present invention. In addition, all the connection / linkage relationships involved in the patent do not simply refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to specific implementation situations. Each technical feature in the present invention can be interactively combined on the premise of not conflicting with each other. Refer to Figures 1 - 12 .

[0047] A cold pressing mechanism for non-transfer of battery cells includes a discharging device 1, an adaptive cold pressing device 2 and a conveying device 3. The discharging device 1 includes a discharging clamp 15. The adaptive cold pressing device 2 includes a first cold pressing block 241 and a second cold pressing block 251. The conveying device 3 includes a conveying belt 31. The discharging device 1 can use its discharging clamp 15 to pick up the battery cell 6 and rotate and move it together with the battery cell 6 to between the first cold pressing block 241 and the second cold pressing block 251 in the adaptive cold pressing device 2. The adaptive cold pressing device 2 can apply pressure to the two jaws of the discharging clamp 15 through its first cold pressing block 241 and second cold pressing block 251 and further cold press the battery cell 6 through the discharging clamp 15. After the cold pressing is completed, the discharging device 1 can use its discharging clamp 15 to rotate and convey the battery cell 6 into the conveying belt 31 of the conveying device 3.

[0048] Preferably, the discharging device 1 includes a discharging device bottom plate 11 and a linear driving component 12 arranged on the discharging device bottom plate 11. The output end of the linear driving component 12 is installed with a rotary driving component 13. The output end of the rotary driving component 13 is installed with a discharging clamp driving cylinder 14. The output end of the discharging clamp driving cylinder 14 is installed with the discharging clamp 15 mentioned above. The discharging clamp 15 is used to pick up the battery cell 6 that has been wound on the winding equipment. The linear driving component 12 and the rotary driving component 13 can respectively drive the discharging clamp 15 to move linearly and rotate.

[0049] Preferably, the linear drive assembly 12 includes a lifting guide rail 121, a lifting lead screw nut pair 122, and a lifting drive motor 123 mounted on the bottom plate 11 of the unloading device. The lifting guide rail 121 is provided with a lifting mounting plate 125 through a lifting guide rail seat 124. The nut of the lifting lead screw nut pair 122 is fixedly connected to the lifting mounting plate 125. The output end of the lifting drive motor 123 is provided with a driving synchronous pulley 126, and one end of the lead screw of the lifting lead screw nut pair 122 is provided with a driven synchronous pulley 127. A synchronous belt 128 is wound between the driving synchronous pulley 126 and the driven synchronous pulley 127. The lifting drive motor 123 can drive the lifting lead screw nut pair 122 to rotate through the driving synchronous pulley 126, the driven synchronous pulley 127, and the synchronous belt 128, and further drive the lifting mounting plate 125 to slide on the lifting guide rail 121 through the lifting lead screw nut pair 122.

[0050] Preferably, the rotary drive assembly 13 includes a rotary motor mounting seat 131 mounted on the output end of the linear drive assembly 12 and a rotary motor reducer 132 mounted on the rotary motor mounting seat 131. The input end of the rotary motor reducer 132 is fixedly installed with a rotary drive motor 133, and the output end of the rotary motor reducer 132 is fixedly installed with a rotary mounting plate 134. The unloading clamp driving cylinder 14 is fixedly installed on the rotary mounting plate 134;

[0051] A unloading clamp sensor 135 is mounted on the rotary mounting plate 134. A unloading clamp induction piece 136 is arranged on the side of one of the clamping jaws of the unloading clamp 15 to cooperate with the unloading clamp sensor 135. The unloading clamp sensor 135 and the unloading clamp induction piece 136 are used to sense the opening size of the unloading clamp 15 and can send out alarm signals. The unloading clamp driving cylinder 14 is used to drive the two clamping jaws of the unloading clamp 15 to open or close.

[0052] Preferably, the adaptive cold pressing device 2 includes a cold pressing device bottom plate 21 and an adaptive guide rail pair 22 arranged on the cold pressing device bottom plate 21. The adaptive guide rail pair 22 is provided with an adaptive mounting plate 23 that can slide on the adaptive guide rail pair 22. The adaptive mounting plate 23 is fixedly installed with a first cold pressing cylinder 24 and a second cold pressing cylinder 25. The output ends of the first cold pressing cylinder 24 and the second cold pressing cylinder 25 are respectively installed with a first cold pressing block 241 and a second cold pressing block 251. The first cold pressing cylinder 24 and the second cold pressing cylinder 25 can respectively drive the first cold pressing block 241 and the second cold pressing block 251 to move towards each other and apply pressure to the battery cell 6.

[0053] When implementing the present invention specifically, the unloading clamp in the battery winding device transfers the battery cell 6 between the first cold pressing block 241 and the second cold pressing block 251. After starting the cold pressing, the first cold pressing cylinder 24 and the second cold pressing cylinder 25 respectively drive the first cold pressing block 241 and the second cold pressing block 251 to move towards each other and press against both sides of the unloading clamp 15, and further cold press the battery cell 6 through the unloading clamp 15.

[0054] During the cold pressing process of the battery cell 6, when the positions of the battery cell 6 and the unloading clamp 15 are not at the central positions of the first cold pressing block 241 and the second cold pressing block 251, when the first cold pressing block 241 and the second cold pressing block 251 cold press the battery cell 6, one of the first cold pressing block 241 and the second cold pressing block 251 will first contact one side of the unloading clamp 15 and generate an initial mutual pressure with the unloading clamp 15. At this time, since the first cold pressing cylinder 24 and the second cold pressing cylinder 25 are installed on the adaptive mounting plate 23, and the adaptive mounting plate 23 is installed on the adaptive guide rail pair 22, therefore, under the action of the initial pressure, the adaptive mounting plate 23 will move to a suitable position on the adaptive guide rail pair 22, and the first cold pressing cylinder 24 and the second cold pressing cylinder 25 will move with the adaptive mounting plate 23 until the battery cell 6 is just located at the central positions of the first cold pressing block 241 and the second cold pressing block 251. At this time, the pressures on both sides of the unloading clamp 15 by the first cold pressing block 241 and the second cold pressing block 251 are the same, further making the pressures on both sides of the battery cell 6 the same, and the force consistency of the cold pressing of the battery cell 6 is high, thereby improving the processing quality of the battery.

[0055] Specifically, the first cold pressing cylinder 24 and the second cold pressing cylinder 25 are connected to the same pressure regulating valve and the same tee joint by equal-length air pipes to ensure the same action of the first cold pressing cylinder 24 and the second cold pressing cylinder 25, and maximize the consistency of the cold pressing process for the battery cell 6.

[0056] During the above cold pressing process, due to the adaptive action of the adaptive mounting plate 23 and the adaptive guide rail pair 22, the situation where the pressure difference applied by the two cold pressing blocks to the unloading clamp 15 is large will not occur, avoiding the unbalanced impact force on the unloading clamp 15 by the cold pressing blocks, greatly reducing the excessive wear of the cold pressing blocks on the unloading clamp 15, being beneficial to protecting the unloading clamp 15, and prolonging the service life of the equipment.

[0057] Preferably, two sets of preloading spring assemblies 27 are installed on the adaptive mounting plate 23. The preloading spring assembly 27 includes a spring preloading plate 271 installed on the adaptive mounting plate 23 and a spring preloading column 272 installed on the side of the cold pressing device bottom plate 21. The spring preloading plate 271 has a through hole which is sleeved on the spring preloading column 272. A spring limit nut 273 is arranged at the end of the spring preloading column 272. A preloading spring 274 sleeved on the spring preloading column 272 is arranged between the inner side wall of the spring limit nut 273 and the outer side wall of the spring preloading plate 271. The spring preloading columns 272 in the two sets of preloading spring assemblies 27 are respectively fixed on two side walls of the cold pressing device bottom plate 21, and the two sets of preloading spring assemblies 27 cooperate to form a centering preloading spring device.

[0058] The two sets of preloading spring assemblies 27 provide a floating buffering process for the lateral movement of the two cold pressing cylinders, avoiding hard impacts and being beneficial to protecting the equipment.

[0059] Preferably, a first electrode detection seat 242 is installed on the first cold pressing block 241. A connecting guide post 243 is arranged on the first electrode detection seat 242. A first electrode detection block 244 is installed at the end of the connecting guide post 243. A compression spring 245 sleeved on the connecting guide post 243 is arranged between the first electrode detection block 244 and the first electrode detection seat 242. A second electrode detection seat 252 is arranged on the second cold pressing block 251, and a second electrode detection block 253 is installed on the second electrode detection seat 252.

[0060] When the first cold pressing block 241 and the second cold pressing block 251 cold press the battery cell 6, the first electrode detection block 244 and the second electrode detection block 253 respectively press on both sides of the tab of the battery cell 6. The first electrode detection block 244 and the second electrode detection block 253 are connected to a detection device to perform a short circuit test on the tab. The first electrode detection block 244 provides a buffering function through the compression spring 245 to avoid hard impacts.

[0061] Preferably, a first sensor mounting bracket 28 is arranged on the side of the adaptive mounting plate 23. A first position sensor 281 and a second position sensor 282 are arranged on the first sensor mounting bracket 28. A first induction piece 283 cooperating with the first position sensor 281 is arranged on the side of the first cold pressing block 241. A second induction piece 284 cooperating with the second position sensor 282 is arranged on the side of the second cold pressing block 251;

[0062] A second sensor mounting bracket 29 is arranged on the side wall of the cold pressing device bottom plate 21. A third position sensor 291 is installed on the second sensor mounting bracket 29. A third induction piece 292 cooperating with the third position sensor 291 is arranged at the bottom of the adaptive mounting plate 23.

[0063] The positions of the first cold pressing block 241, the second cold pressing block 251 and the adaptive mounting plate 23 can be monitored in real time through the first position sensor 281, the second position sensor 282, the third position sensor 291, the first induction piece 283, the second induction piece 284 and the third induction piece 292. When the moving distances of the first cold pressing block 241, the second cold pressing block 251 and the adaptive mounting plate 23 exceed the preset values, an alarm signal is output through the sensors and the equipment stops, which is beneficial to protecting the equipment and products.

[0064] Preferably, the first cold pressing cylinder 24 and the second cold pressing cylinder 25 are respectively mounted on the adaptive mounting plate 23 through the first cold pressing cylinder seat 240 and the second cold pressing cylinder seat 250, and waist-shaped holes for facilitating the adjustment of the mounting positions are formed in both the first cold pressing cylinder seat 240 and the second cold pressing cylinder seat 250;

[0065] Preferably, the adaptive guide rail pair 22 includes an adaptive linear guide rail and an adaptive guide rail seat. The adaptive linear guide rail is fixedly mounted on the cold pressing device bottom plate 21, and the adaptive mounting plate 23 is mounted on the adaptive linear guide rail through the adaptive guide rail seat.

[0066] Preferably, the conveying device 3 further includes a conveying belt roller and a roller mounting plate. The conveying belt 31 is wound around the conveying belt roller. Both ends of the conveying belt roller are mounted on the roller mounting plate through bearings, and a belt roller driving motor is mounted on the side of the roller mounting plate. The belt roller driving motor is used to drive the conveying belt roller to rotate and further drive the conveying belt 31 to operate through the conveying belt roller;

[0067] A scraping device 4 for scraping the battery cell 6 on the unloading clamp 15 onto the conveying belt 31 is arranged on one side of the conveying device 3 where the battery cell 6 is received;

[0068] The scraping device 4 includes a scraping device bottom plate 41 and a first scraping guide rail 42 and a first scraping driving cylinder 43 directly or indirectly mounted on the scraping device bottom plate 41. The first scraping guide rail 42 is provided with a scraping sliding mounting plate 44 through a first scraping guide rail seat 421. The output end of the first scraping driving cylinder 43 is connected to the scraping sliding mounting plate 44 and can drive the scraping sliding mounting plate 44 to slide on the first scraping guide rail 42;

[0069] A second scraping guide rail seat 451 and a second scraping driving cylinder 46 are provided on the scraping sliding mounting plate 44. A second scraping guide rail 45 is provided on the second scraping guide rail seat 451. The output end of the second scraping driving cylinder 46 is connected to the second scraping guide rail 45 and can drive the second scraping guide rail 45 to slide on the second scraping guide rail seat 451. A battery cell scraping plate seat 47 is provided on the second scraping guide rail 45. A battery cell scraping plate 48 for scraping the battery cell 6 on the unloading clamp 15 onto the conveying belt 31 is provided on the battery cell scraping plate seat 47;

[0070] The first scraping guide rail 42 and the second scraping guide rail 45 are arranged perpendicular to each other.

[0071] Specifically, when the battery cell 6 is cold-pressed, the unloading clamp 15 carries the cold-pressed battery cell 6 to move to a preset unloading position. After reaching the unloading position, the unloading clamp driving cylinder 14 drives the two jaws of the unloading clamp 15 to loosen. At this time, the first scraping driving cylinder 43 and the second scraping driving cylinder 46 in the scraping device 4 cooperate to drive the battery cell scraping plate 48 to insert into the unloading clamp 15 and scrape the battery cell 6 in the unloading clamp 15 onto the conveying belt 31 in the conveying device 3. The conveying belt 31 conveys the cold-pressed battery cell 6 to the next process position under the driving of the belt roller driving motor.

[0072] The present invention also provides a battery cell non-transfer cold pressing process, including the following process steps:

[0073] S1. Lift and clamp the battery cell 6. Drive the unloading clamp 15 of the unloading device 1 to rise to the unloading position by the unloading device 1, and the unloading clamp 15 clamps the wound battery cell 6 on the winding device;

[0074] S2. Lower the battery cell 6. After the unloading clamp 15 clamps the battery cell 6, the unloading device 1 drives the unloading clamp 15 and the battery cell 6 to descend to a preset position;

[0075] S3. Rotate the battery cell 6 into place. The unloading device 1 drives the unloading clamp 15 and the battery cell 6 to rotate a preset angle and makes the unloading clamp 15 and the battery cell 6 located above the space between the first cold pressing block 241 and the second cold pressing block 251 in the adaptive cold pressing device 2;

[0076] S4. Lower the battery cell 6 into the adaptive cold pressing device 2. The unloading device 1 drives the unloading clamp 15 and the battery cell 6 to descend and enter a preset position in the adaptive cold pressing device 2, so that the unloading clamp 14 clamping the battery cell 6 is located between the first cold pressing block 241 and the second cold pressing block 251 in the adaptive cold pressing device 1;

[0077] S5. Cold pressing and tab short - circuit test without transferring the battery cell 6: The adaptive cold pressing device 2 uses its first cold pressing block 241 and second cold pressing block 251 to cold press the unloading clamp 15 holding the battery cell 6. During the cold pressing process, the tab short - circuit test of the battery cell 6 is completed synchronously. During this process, the unloading clamp 15 continuously holds the battery cell 6 without transferring the battery cell 6 to the adaptive cold pressing device 3. During the cold pressing process, the adaptive cold pressing device 3 can adaptively move to the middle position of cold pressing. The middle position of cold pressing is that the unloading clamp 15 is approximately in the middle between the first cold pressing block 241 and the second cold pressing block 251, avoiding yaw between the first cold pressing block 241, the second cold pressing block 251 and the unloading clamp 15.

[0078] S6. Reset of the adaptive cold pressing device 2: After the adaptive cold pressing device 2 completes the cold pressing and tab short - circuit test, the adaptive cold pressing device 2 drives its first cold pressing block 241 and second cold pressing block 251 to retract and reset.

[0079] S7. The battery cell 6 rises and leaves the adaptive cold pressing device 2: The unloading device 1 drives the unloading clamp 15 and the battery cell 6 to rise to a preset position, so that the unloading clamp 15 and the battery cell 6 leave the cold pressing area of the adaptive cold pressing device 2.

[0080] S8. Rotational blanking of the battery cell 6: The unloading device 1 drives the unloading clamp 15 and the battery cell 6 to rotate a preset angle and then reach the blanking position. The unloading clamp 15 opens and releases the grip on the battery cell 6, and the battery cell 6 on the unloading clamp 15 is scraped onto the conveyor belt 31 of the conveyor device 3 by the scraping device 4.

[0081] Specifically, after the battery core winding device finishes winding the battery core, the unloading device 1 drives the unloading clamp 15 to rise to the unloading position through its linear drive assembly 12. The unloading clamp 15 clamps the battery core 6, and the winding needle of the winding device retracts the needle. Further, the linear drive assembly 12 in the unloading device 1 drives the unloading clamp 15 and the battery core 6 to descend to a preset position, and the unloading clamp 15 exits the winding area of the winding device. After the battery core 6 and the unloading clamp 15 descend in place, the rotary drive assembly 13 in the unloading device 1 drives the unloading clamp 15 and the battery core 6 to rotate 180° around the rotation axis of the rotary mounting plate 134. After the rotation is in place, the linear drive assembly 12 in the unloading device 1 drives the unloading clamp 15 and the battery core 6 to move downward and makes the unloading clamp 15 and the battery core 6 enter the cold pressing position in the adaptive cold pressing device 2. Further, the adaptive cold pressing device 2 drives the first cold pressing block 241 and the second cold pressing block 251 to move towards each other through its first cold pressing cylinder 24 and second cold pressing cylinder 25 and cold press on both sides of the unloading clamp 15, and uses the two jaws of the unloading clamp 15 to cold press the battery core 6. During the cold pressing process of the battery core 6, the unloading clamp 15 always maintains the clamping of the battery core 6 and does not loosen the battery core 6. Therefore, the battery core 6 will not be transferred to the adaptive cold pressing device 2, and the battery core 6 will not be loosened or deformed due to the loosening of the unloading clamp 15 during the transfer process, which can improve the cold pressing quality of the battery core.

[0082] During the cold pressing process of the battery core 6, the adaptive cold pressing device 2 synchronously performs a short circuit test on the tabs of the battery core 6.

[0083] In addition, the adaptive cold pressing device 2 can automatically float the first cold pressing block 241 and the second cold pressing block 251 to positions approximately equidistant from both sides of the unloading clamp 15 through its adaptive guide rail pair 22 and adaptive mounting plate 23, avoiding the position yaw of the two cold pressing blocks, thereby preventing the cold pressing blocks from causing a violent impact on the unloading clamp 15, reducing the loss of the unloading clamp 15, improving the consistency of the pressure on the battery core 6, and improving the cold pressing quality.

[0084] Further, after the battery core 6 is cold pressed, the adaptive cold pressing device 2 drives the first cold pressing block 241 and the second cold pressing block 251 to move in the reverse direction through its first cold pressing cylinder 24 and second cold pressing cylinder 25 and releases the pressure on the unloading clamp 15 and the battery core 6. After the unloading clamp 15 and the battery core 6 are released by the cold pressing blocks, the linear drive assembly 12 in the unloading device 1 drives the unloading clamp 15 and the battery core 6 to rise a certain distance, so that the unloading clamp 15 and the battery core 6 leave the cold pressing position in the adaptive cold pressing device 2.

[0085] In the further discharging device 1, the rotation drive assembly 13 drives the discharging clamp 15 and the battery cell to rotate reversely by 90°, and the battery cell 6 is moved to the discharging position. After reaching the discharging position, the driving cylinder 14 of the discharging clamp drives the two jaws of the discharging clamp 15 to open. At this time, the first scraping drive cylinder 43 and the second scraping drive cylinder 46 in the scraping device 4 cooperate to drive the battery cell scraper 48 to insert into the discharging clamp 15 and scrape the battery cell 6 in the discharging clamp 15 onto the conveying belt 31 in the conveying device 3. The conveying belt 31 conveys the battery cell 6 that has completed cold pressing to the next process position under the driving of the belt roller drive motor.

[0086] The above is a specific description of the preferred embodiment of the present invention, but the present invention is not limited to the described embodiment. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A cold pressing mechanism without cell transfer, characterized in that: It includes a discharging device (1), an adaptive cold pressing device (2) and a conveying device (3). The discharging device (1) includes a discharging clamp (15). The adaptive cold pressing device (2) includes a first cold pressing block (241) and a second cold pressing block (251). The conveying device (3) includes a conveying belt (31). The discharging device (1) can pick up the battery cell (6) through its discharging clamp (15) and rotate and move together with the battery cell (6) to between the first cold pressing block (241) and the second cold pressing block (251) in the adaptive cold pressing device (2). The adaptive cold pressing device (2) can press on the two clamping jaws of the discharging clamp (15) through its first cold pressing block (241) and second cold pressing block (251), and further press the battery cell (6) through the discharging clamp (15). After the cold pressing is completed, the discharging device (1) can rotate and convey the battery cell (6) through its discharging clamp (15) into the conveying belt (31) of the conveying device (3).

2. The cold pressing mechanism for non-transfer of battery cells according to claim 1, wherein: The discharging device (1) includes a discharging device bottom plate (11) and a linear driving assembly (12) arranged on the discharging device bottom plate (11). The output end of the linear driving assembly (12) is equipped with a rotary driving assembly (13). The output end of the rotary driving assembly (13) is equipped with a discharging clamp driving cylinder (14). The output end of the discharging clamp driving cylinder (14) is equipped with the discharging clamp (15). The discharging clamp (15) is used to pick up the battery cell (6) that has been wound on the winding equipment. The linear driving assembly (12) and the rotary driving assembly (13) can respectively drive the discharging clamp (15) to move linearly and rotationally.

3. The cold pressing mechanism for non-transfer of battery cells according to claim 2, wherein: The linear driving assembly (12) includes a lifting guide rail (121), a lifting screw nut pair (122) and a lifting driving motor (123) installed on the discharging device bottom plate (11). A lifting mounting plate (125) is installed on the lifting guide rail (121) through a lifting guide rail seat (124). The nut of the lifting screw nut pair (122) is fixedly connected to the lifting mounting plate (125). The output end of the lifting driving motor (123) is provided with a driving synchronous pulley (126). One end of the screw rod of the lifting screw nut pair (122) is provided with a driven synchronous pulley (127). A synchronous belt (128) is wound between the driving synchronous pulley (126) and the driven synchronous pulley (127). The lifting driving motor (123) can drive the lifting screw nut pair (122) to rotate through the driving synchronous pulley (126), the driven synchronous pulley (127) and the synchronous belt (128), and further drive the lifting mounting plate (125) to slide on the lifting guide rail (121) through the lifting screw nut pair (122).

4. The cold pressing mechanism for non-transfer of battery cells according to claim 2, characterized in that: The rotation drive assembly (13) includes a rotation motor mounting base (131) installed at the output end of the linear drive assembly (12) and a rotation motor reducer (132) installed on the rotation motor mounting base (131). A rotation drive motor (133) is fixedly installed at the input end of the rotation motor reducer (132), and a rotation mounting plate (134) is fixedly installed at the output end of the rotation motor reducer (132). The unloading clamp drive cylinder (14) is fixedly installed on the rotation mounting plate (134). A unloading clamp sensor (135) is installed on the rotation mounting plate (134). A unloading clamp induction piece (136) for cooperating with the unloading clamp sensor (135) is arranged on the side of one of the clamping jaws of the unloading clamp (15). The unloading clamp sensor (135) and the unloading clamp induction piece (136) are used to sense the opening size of the unloading clamp (15) and can send out an alarm signal. The unloading clamp drive cylinder (14) is used to drive the two clamping jaws of the unloading clamp (15) to open or close.

5. The cold pressing mechanism without cell transfer according to claim 1, characterized in that: The adaptive cold pressing device (2) includes a cold pressing device bottom plate (21) and an adaptive guide pair (22) arranged on the cold pressing device bottom plate (21). An adaptive mounting plate (23) that can slide on the adaptive guide pair (22) is installed on the adaptive guide pair (22). A first cold pressing cylinder (24) and a second cold pressing cylinder (25) are fixedly installed on the adaptive mounting plate (23). The output ends of the first cold pressing cylinder (24) and the second cold pressing cylinder (25) are respectively installed with a first cold pressing block (241) and a second cold pressing block (251). The first cold pressing cylinder (24) and the second cold pressing cylinder (25) can respectively drive the first cold pressing block (241) and the second cold pressing block (251) to move towards each other and apply pressure to the battery cell (6).

6. The cold pressing mechanism for non-transfer of battery cells according to claim 5, characterized in that: Two groups of pre-pressing spring assemblies (27) are installed on the adaptive mounting plate (23). The pre-pressing spring assembly (27) includes a spring pre-pressing plate (271) installed on the adaptive mounting plate (23) and a spring pre-pressing column (272) installed on the side of the cold pressing device bottom plate (21). The spring pre-pressing plate (271) has a through hole and the through hole is sleeved on the spring pre-pressing column (272). A spring limit nut (273) is arranged at the end of the spring pre-pressing column (272). A pre-pressing spring (274) sleeved on the spring pre-pressing column (272) is arranged between the inner side wall of the spring limit nut (273) and the outer side wall of the spring pre-pressing plate (271). The spring pre-pressing columns (272) in the two groups of pre-pressing spring assemblies (27) are respectively fixed on the two side walls of the cold pressing device bottom plate (21). The two groups of pre-pressing spring assemblies (27) cooperate to form a centering pre-pressing spring device.

7. The cold pressing mechanism for non-transfer of battery cells according to claim 1, wherein: A first electrode detection seat (242) is mounted on the first cold pressing block (241). A connecting guide post (243) is provided on the first electrode detection seat (242). A first electrode detection block (244) is mounted at the end of the connecting guide post (243). A compression spring (245) sleeved on the connecting guide post (243) is arranged between the first electrode detection block (244) and the first electrode detection seat (242). A second electrode detection seat (252) is provided on the second cold pressing block (251). A second electrode detection block (253) is mounted on the second electrode detection seat (252).

8. A cold pressing mechanism for non-transfer of battery cells according to claim 5, characterized in that: A first sensor mounting bracket (28) is provided on the side of the adaptive mounting plate (23). A first position sensor (281) and a second position sensor (282) are provided on the first sensor mounting bracket (28). A first induction sheet (283) for cooperating with the first position sensor (281) is provided on the side of the first cold pressing block (241). A second induction sheet (284) for cooperating with the second position sensor (282) is provided on the side of the second cold pressing block (251); A second sensor mounting bracket (29) is provided on the side wall of the cold pressing device bottom plate (21). A third position sensor (291) is mounted on the second sensor mounting bracket (29). A third induction sheet (292) for cooperating with the third position sensor (291) is provided at the bottom of the adaptive mounting plate (23); The first cold pressing cylinder (24) and the second cold pressing cylinder (25) are respectively mounted on the adaptive mounting plate (23) through a first cold pressing cylinder seat (240) and a second cold pressing cylinder seat (250). Waist-shaped holes for facilitating the adjustment of the mounting position are formed in both the first cold pressing cylinder seat (240) and the second cold pressing cylinder seat (250); The adaptive guide rail pair (22) includes an adaptive linear guide rail and an adaptive guide rail seat. The adaptive linear guide rail is fixedly mounted on the cold pressing device bottom plate (21). The adaptive mounting plate (23) is mounted on the adaptive linear guide rail through the adaptive guide rail seat.

9. A cold pressing mechanism for a battery cell without transfer according to claim 1, characterized in that: The conveying device (3) further includes a conveying belt roller and a roller mounting plate. The conveying belt (31) is wound around the conveying belt roller. Both ends of the conveying belt roller are mounted on the roller mounting plate through bearings. A belt roller driving motor is mounted on the side of the roller mounting plate. The belt roller driving motor is used to drive the conveying belt roller to rotate and further drive the conveying belt (31) to operate through the conveying belt roller; The conveying device (3) is provided with a scraping device (4) for scraping the battery cell (6) on the unloading clamp (15) onto the conveying belt (31) on one side where it receives the battery cell (6); The scraping device (4) includes a scraping device bottom plate (41), a first scraping guide rail (42), and a first scraping driving cylinder (43) that are directly or indirectly installed on the scraping device bottom plate (41). The first scraping guide rail (42) is provided with a scraping sliding mounting plate (44) through a first scraping guide rail seat (421). The output end of the first scraping driving cylinder (43) is connected to the scraping sliding mounting plate (44) and can drive the scraping sliding mounting plate (44) to slide on the first scraping guide rail (42). A second scraping guide rail seat (451) and a second scraping driving cylinder (46) are provided on the scraping sliding mounting plate (44). A second scraping guide rail (45) is provided on the second scraping guide rail seat (451). The output end of the second scraping driving cylinder (46) is connected to the second scraping guide rail (45) and can drive the second scraping guide rail (45) to slide on the second scraping guide rail seat (451). A battery cell scraping seat (47) is provided on the second scraping guide rail (45). A battery cell scraper (48) for scraping the battery cell (6) on the unloading clamp (15) onto the conveyor belt (31) is provided on the battery cell scraping seat (47). The first scraping guide rail (42) and the second scraping guide rail (45) are arranged perpendicular to each other.

10. A cold pressing process without cell transfer, characterized in that: It includes the following process steps: S1. Lift and clamp the battery cell (6). The unloading device (1) drives its unloading clamp (15) to rise to the unloading position, and the unloading clamp (15) clamps the wound battery cell (6) on the winding device. S2. Lower the battery cell (6). After the unloading clamp (15) clamps the battery cell (6), the unloading device (1) drives the unloading clamp (15) and the battery cell (6) to lower to a preset position. S3. Rotate the battery cell (6) into place. The unloading device (1) drives the unloading clamp (15) and the battery cell (6) to rotate a preset angle and makes the unloading clamp (15) and the battery cell (6) located above the space between the first cold pressing block (241) and the second cold pressing block (251) in the adaptive cold pressing device (2). S4. Lower the battery cell (6) into the adaptive cold pressing device (2). The unloading device (1) drives the unloading clamp (15) and the battery cell (6) to lower and enter a preset position in the adaptive cold pressing device (2), so that the unloading clamp (14) clamping the battery cell (6) is located between the first cold pressing block (241) and the second cold pressing block (251) in the adaptive cold pressing device (1). S5. Non-transfer cold pressing and tab short-circuit test of the battery cell (6). The adaptive cold pressing device (2) uses its first cold pressing block (241) and second cold pressing block (251) to cold press the unloading clamp (15) clamping the battery cell (6). During the cold pressing process, the tab short-circuit test of the battery cell (6) is completed synchronously. During this process, the unloading clamp (15) continuously clamps the battery cell (6) without transferring the battery cell (6) to the adaptive cold pressing device (3). During the cold pressing process, the adaptive cold pressing device (3) can adaptively move to the intermediate cold pressing position, which is the position where the unloading clamp (15) is approximately in the middle between the first cold pressing block (241) and the second cold pressing block (251), to avoid yaw between the first cold pressing block (241), the second cold pressing block (251) and the unloading clamp (15). S6. Reset of the adaptive cold pressing device (2). After the adaptive cold pressing device (2) completes the cold pressing and tab short-circuit test, the adaptive cold pressing device (2) drives its first cold pressing block (241) and second cold pressing block (251) to retract and reset. S7. The battery cell (6) rises and leaves the adaptive cold pressing device (2). The unloading device (1) drives the unloading clamp (15) and the battery cell (6) to rise to a preset position, so that the unloading clamp (15) and the battery cell (6) leave the cold pressing area of the adaptive cold pressing device (2). S8. Rotational discharging of the battery cell (6). The unloading device (1) drives the unloading clamp (15) and the battery cell (6) to rotate a preset angle and then reach the discharging position. The unloading clamp (15) opens and releases the clamping of the battery cell (6), and the battery cell (6) on the unloading clamp (15) is scraped onto the conveyor belt (31) of the conveying device (3) by the scraping device (4).

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