Full-tab battery cell rubbing device and rubbing method

Abstract

The invention relates to the technical field of lithium batteries, and discloses a full-tab battery cell rubbing device and rubbing method.The full-tab battery cell rubbing device comprises a rotating mechanism and a rubbing mechanism, the rotating mechanism comprises a rotating seat, a gathering station and a rubbing station are arranged on the outer side of the rotating seat, a material rotating clamp is arranged on the rotating seat, and the rotating seat is in transmission connection with a rotating driving part; the gathering mechanism is arranged at the gathering station, the gathering mechanism comprises a gathering seat which is arranged at one end of the material rotating clamp, and a forming groove is formed in the gathering seat; the kneading and flattening mechanism is arranged at the kneading and flattening station and comprises a kneading and flattening seat, the kneading and flattening seat is in transmission connection with a kneading and flattening driving part, and a shaping assembly is arranged on the kneading and flattening seat; the rubbing method adopts the rubbing device and comprises the following steps: feeding the battery cell to the material rotating clamp; the gathering mechanism pre-presses and gathers the tabs; and the rubbing mechanism rotates to rub the tabs. The tab flattening device has the technical effects of improving the tab outward turning, improving the tab flattening quality, improving the production efficiency and optimizing the production process.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery technology, specifically relating to a flattening device and method for a full-tab battery cell. Background Technology

[0002] As the industry continues to demand higher fast-charging performance and high power of lithium-ion batteries, full-tab technology is receiving increasing attention. Full-tab technology uses the current collector as the entire tab, which significantly optimizes the current transmission path, shortens the transmission distance, and reduces the battery's internal resistance, thereby improving power performance. In cylindrical full-tab batteries, the two end faces of the cell serve as tabs.

[0003] In the production process of multi-tab battery cells, tab flattening is a crucial step. Before flattening, the tabs of the wound cell are uneven, often exhibiting issues such as folded edges, burrs, and outward deviation in concentricity. The flattening process shapes and compacts the end face of the cell, making its tabs flat and tight, thus enabling a low-resistance, high-reliability connection with the end cap of the multi-tab battery.

[0004] Currently, the flattening device for all-tab battery cells is usually set up separately from the winding device. It includes a conveying mechanism and a positioning fixture. Before flattening the battery cell, the wound battery cell is unloaded from the winding device. The conveying mechanism transports the battery cell unloaded from the winding device to the positioning fixture. The positioning fixture fixes the battery cell. A flattening head is set on one side of the positioning fixture. After the battery cell is positioned by the positioning fixture, the flattening head rotates and squeezes the end face of the battery cell to make the loose tab structure compact and flat.

[0005] However, during the rotation and squeezing process of flattening the head, the tabs may turn outward due to uneven force. When the cell is installed into the casing of the full-tab battery, the outward-turned tabs are prone to contact with the casing of the full-tab battery, causing a short circuit and thus posing a serious safety hazard. Summary of the Invention

[0006] To address the shortcomings of the prior art, this invention provides a flattening device and method for all-tab battery cells. The cell is held by a transfer clamp, and the tabs are first gathered by a gathering mechanism, and then flattened by a flattening mechanism. The tabs are gathered by the gathering mechanism before flattening, which can improve the problem of tabs turning outward, thereby improving the safety of using all-tab batteries.

[0007] The technical effects to be achieved by this invention are realized through the following technical aspects: In a first aspect, the present invention provides a device for flattening omnipolar battery cells, including: A rotating mechanism includes a rotating base, on the outside of which are provided a gathering station and a flattening station. A material transfer clamp is provided on the rotating base, which holds the battery cell. The rotating base is connected to a rotating drive component for driving the rotating base to rotate. The rotating drive component drives the material transfer clamp to rotate to the gathering station or the flattening station via the rotating base. A gathering mechanism is provided at the gathering station. The gathering mechanism includes a gathering seat located at one end of the transfer clamp, and the gathering seat is provided with a forming groove for gathering the electrode tabs; and A kneading mechanism is provided at the kneading station. The kneading mechanism includes a kneading seat, which is connected to a kneading drive member for driving the kneading seat to rotate. A shaping component for rotating and kneading the tab is provided on the kneading seat.

[0008] In some implementations, the gathering seat is driven by a gathering drive, which drives the gathering seat to move closer to or away from the transfer clamp.

[0009] In some implementations, a housing is provided on one side of the kneading seat, the kneading seat is rotatably mounted on the housing, and the housing is driven by a feeding drive for driving the housing closer to or away from the material transfer clamp; the shaping assembly includes: multiple kneading wheels, which are rotatably mounted on the kneading seat; and a center pin located inside the kneading wheels.

[0010] In some implementations, an edge positioning mechanism is provided on one side of the gathering mechanism, and the edge positioning mechanism positions the battery cell within the gathering station.

[0011] In some implementations, the outer side of the rotary table is provided with a conveying station for feeding or discharging the battery cells, and the transfer clamp rotates cyclically between the conveying station, the gathering station and the flattening station. The rotary table is provided with a conveying mechanism for conveying the battery cells at the conveying station.

[0012] In some implementations, a support frame is provided on one side of the rotary table, and the rotary table is rotatably mounted on the support frame; the conveying mechanism includes: a receiving clamp, provided on the support frame, the receiving clamp receiving the wound battery cell; and an outward moving component, provided on one side of the support frame, the outward moving component conveying the battery cell received by the receiving clamp to the rotary clamp.

[0013] In some implementations, a feeding assembly for unloading the wound battery cell is provided on one side of the receiving clamp, and the receiving clamp receives the battery cell unloaded by the feeding assembly.

[0014] In some implementations, the feeding assembly includes a feeding shaft, which is connected to a feeding rotation drive. The shaft is equipped with a feeding clamp for holding the battery cell, and the feeding rotation drive drives the feeding clamp to rotate to the receiving clamp via the shaft.

[0015] In some implementations, a conveyor line for conveying the flattened battery cell is provided on one side of the support frame; the outward transfer assembly includes a first transfer clamp and a second transfer clamp, wherein the first transfer clamp transfers the battery cell between the receiving clamp and the transfer clamp, and the second transfer clamp transfers the battery cell between the transfer clamp and the conveyor line.

[0016] Secondly, the present invention provides a method for flattening all tabs, using the aforementioned device for flattening all tab cells. The method for flattening all tab cells includes the following steps: feeding the cell into a transfer clamp; rotating the transfer clamp, the cell rotates to the gathering station, and the gathering seat pre-presses and gathers the tabs through a forming groove; rotating the transfer clamp, the cell rotates to the flattening station, the flattening seat rotates, and the shaping component rotates to flatten the tabs.

[0017] In summary, the present invention has at least the following advantages: 1. The all-tab battery cell flattening device provided by this invention uses a transfer clamp to hold and fix the wound battery cell. A rotation drive drives a rotating base to rotate, which in turn drives the transfer clamp to rotate synchronously. When the transfer clamp first rotates to the gathering position, the gathering base gathers the tabs through the forming groove. When the transfer clamp rotates to the flattening position, the flattening drive drives the flattening base to rotate, which in turn drives the shaping assembly to rotate. The shaping assembly rotates and flattens the tabs. The tabs are first gathered and shaped by the gathering mechanism, which helps to reduce the gap between the flattening mechanism and the tabs. The flattening mechanism and the tabs are in full contact, and the tabs are effectively limited. During the rotation and flattening process of the shaping assembly, the tabs are subjected to uniform force, which can improve the problem of tabs turning outward and improve the safety of all-tab batteries.

[0018] Meanwhile, compared with the traditional flattening device for all-tab cells, the rotating mechanism can be integrated with the cell winding and unloading process, breaking the traditional process of "winding-unloading-transporting-positioning-flattening" for cells, thereby reducing the additional cell handling and positioning time and helping to speed up the production cycle of the entire cell production line.

[0019] 2. The full tab flattening method provided by the present invention is simple to operate. The gathering seat squeezes the tab through the forming groove, and the tab is gathered and shaped. Then the shaping component rotates and flattens the tab. The tab is subjected to uniform force during the flattening process, has good consistency, and is not prone to tab flipping. Attached Figure Description

[0020] Figure 1 This is a front view of the all-polar cell flattening device according to a specific embodiment of the present invention.

[0021] Figure 2 This is a front view of the rotating mechanism according to a specific embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the gathering mechanism and the edge positioning mechanism in a specific embodiment of the present invention.

[0023] Figure 4 This is a side view of the gathering mechanism and the edge positioning mechanism according to a specific embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the kneading mechanism according to a specific embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the kneading seat, kneading wheel, and center needle in a specific embodiment of the present invention.

[0026] Figure 7 for Figure 6 A schematic diagram of the AA section.

[0027] Figure 8 This is a front view of the outer casing and protective cover according to a specific embodiment of the present invention.

[0028] Figure 9 for Figure 8 Schematic diagram of the BB section.

[0029] Figure 10 This is a schematic diagram of the rotating mechanism and receiving clamp according to a specific embodiment of the present invention.

[0030] Figure 11 This is a schematic diagram of the material feeding assembly according to a specific embodiment of the present invention.

[0031] Figure 12 This is a schematic diagram of the structure of the external moving component according to a specific embodiment of the present invention.

[0032] Marked in the image: 1. Rotating mechanism; 11. Rotary seat; 111. Conveying station; 112. Gathering station; 113. Flattening station; 114. Delaying station; 12. Transfer clamp; 121. Rotating plate; 13. Rotating drive component; 14. Support frame; 2. Gathering mechanism; 21. Gathering seat; 211. Forming groove; 22. Gathering drive component; 3. Kneading mechanism; 31. Outer shell; 311. Feed drive component; 32. Kneading seat; 321. Kneading roller; 322. Connecting seat; 323. Front cover; 3231. Dustproof part; 324. Rear cover; 325. Center pin; 326. Bearing; 33. Kneading drive component; 331. Drive shaft; 332. Synchronous pulley; 34. Dust removal assembly; 341. Protective cover; 3411. Inlet; 342. Dust removal pipe; 343. Fan blade; 344. Inner pipe; 4. Edge positioning mechanism; 41. Floating probe; 411. Contact part; 42. Sensor; 5. Conveying mechanism; 51. Receiving clamp; 511. Transverse transfer seat; 512. Transverse transfer drive; 52. Outward transfer assembly; 521. First transfer clamp; 522. Second transfer clamp; 523. Transfer plate; 524. Lifting and transferring drive; 525. Horizontal transfer drive; 526. Lifting plate; 53. Unloading assembly; 531. Unloading shaft; 532. Unloading clamp; 533. Gap adjusting component; 534. Mounting plate; 54. Conveyor line; 541. Conveyor seat; 542. Tray; 6. Battery cells; 7. Needle winding and unloading station. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of the present invention.

[0034] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0035] Example 1: Please see Figure 1 and Figure 2 The all-tab battery cell flattening device of the present invention can flatten the tabs of the all-tab battery cell 6, making the tabs flat and firm, which is conducive to achieving a low-resistance and high-reliability connection between the all-tab battery cell 6 and the end cap in subsequent operations.

[0036] The omnipolar battery cell flattening device of the present invention includes a rotating mechanism 1, the rotating mechanism 1 includes a rotating base 11, and a gathering station 112 and a flattening station 113 are provided on the outer side of the rotating base 11.

[0037] A transfer clamp 12 is provided on the rotary base 11 to clamp and fix the battery cell 6. In some specific embodiments, a rotating plate 121 is provided on the rotary base 11, and the rotating plate 121 and the rotary base 11 can be detachably connected by bolts. The transfer clamp 12 is disposed on the rotating plate 121 and includes a first gripper. The first gripper has an arc-shaped groove adapted to the battery cell 6. The first gripper can stably clamp the battery cell 6 through the arc-shaped groove, thereby ensuring that the battery cell 6 is not easily displaced. The first gripper is driven by a first clamping drive component. The first clamping drive component is preferably, but not limited to, a first gripper cylinder. The first clamping drive component drives the first gripper to open or close to clamp or release the battery cell 6.

[0038] Combination Figure 10 The rotary table 11 is connected to a rotary drive 13 for driving the rotation of the rotary table 11. Specifically, the rotary drive 13 can be a rotary motor. The rotary drive 13 drives the rotary table 11 to rotate, and the rotary table 11 drives the material transfer clamp 12 to rotate synchronously. The material transfer clamp 12 switches between the gathering station 112 and the flattening station 113. In some specific embodiments, the rotary table is provided with multiple material transfer clamps 12. When the rotary drive 13 drives the rotary table 11 to rotate, the rotary table 11 drives multiple battery cells 6 to rotate sequentially to the gathering station 112 and the flattening station 113 via the material transfer clamps 12, which is beneficial for continuous production and improving the production efficiency of the battery cells 6.

[0039] The rotary table 11 is equipped with a gathering mechanism 2 at the gathering station 112. The gathering mechanism 2 is used to compress and gather the electrode tabs. Please refer to... Figure 3 and Figure 4 The gathering mechanism 2 includes a gathering seat 21, which is located at one end of the transfer clamp 12. Specifically, two gathering seats 21 may be provided. When the transfer clamp 12 holds the battery cell 6 and rotates it to the gathering station 112, the gathering seats 21 are located at both ends of the battery cell 6, which can pre-compress and gather the positive and negative electrode tabs of the battery cell 6 respectively. A forming groove 211 is provided on the gathering seat 21. Specifically, the forming groove 211 is a conical groove, and the gathering seat 21 compresses the electrode tabs in the forming groove 211. In some specific embodiments, the gathering seat 21 is drivenly connected to a gathering drive 22. The gathering drive 22 is preferably, but not limited to, a gathering cylinder. The gathering drive 22 drives the gathering seat 21 to move closer to or away from the transfer clamp 12.

[0040] When the gathering drive 22 drives the gathering seat 21 to approach the transfer clamp 12, the two gathering seats 21 move closer to each other so that the positive electrode tab and the negative electrode tab extend into the corresponding forming groove 211 respectively. As the two gathering seats 21 move closer, the gathering seat 21 squeezes the electrode tab at the forming groove 211, and the electrode tab shrinks and gathers to form. The electrode tab first gathers through the forming groove 211.

[0041] Please see Figures 5-7The rotary table 11 is equipped with a kneading mechanism 3 at the kneading station 113. The kneading mechanism 3 includes a kneading seat 32. Please refer to [link / reference]. Figure 5 The kneading seat 32 is connected to the kneading drive 33, and the kneading seat 32 is provided with a shaping component for rotating the kneading tab.

[0042] The wound battery cell 6 is fed to the transfer clamp 12, which holds the battery cell 6. When the rotary drive 13 drives the transfer clamp 12 to rotate to the gathering station 112 via the rotating base 11, the gathering drive 22 drives the gathering seat 21 to approach the battery cell 6, and the electrode tab enters the forming groove 211. The gathering drive 22 drives the gathering seat 21 to squeeze the battery cell 6. The gathering seat 21 squeezes and gathers the electrode tab in the forming groove 211. The gathering drive 22 drives the gathering seat 21 to move away from the battery cell 6, and the electrode tab is gathered and formed. Then, the rotary drive 13 drives the transfer clamp 12 to rotate to the flattening station 113. The flattening drive 33 drives the flattening seat 32 to rotate, and the flattening seat 32 drives the shaping component to rotate synchronously. The shaping component rotates and flattens the electrode tab, making the electrode tab flat, tight, and not easy to flip outward. The full-tab battery cell flattening device first gathers the tabs through the gathering mechanism 2. The gathered tabs are in full contact with the flattening mechanism 3 to ensure that the force is evenly distributed during the rotational flattening operation, thereby improving the problem of the tabs turning outward and ensuring that the tabs are all tilted towards the center of the battery cell 6, thus ensuring the safety of the battery cell 6 in use.

[0043] Example 2: The difference between this embodiment and Embodiment 1 is that this embodiment further optimizes the structure of the gathering mechanism 2 and the flattening mechanism 3 of the present invention.

[0044] Please see Figures 5-7 In a preferred embodiment, a housing 31 is provided on one side of the kneading base 32, and the kneading base 32 is rotatably mounted on the housing 31. The housing 31 is driven by a feeding drive member 311 for driving the housing 31 closer to or away from the transfer clamp 12. In some specific embodiments, the housing 31 is located at both ends of the transfer clamp 12, and a feeding guide rail is provided on one side of the housing 31. A feeding slider is slidably mounted on the feeding guide rail, and the housing 31 is mounted on the feeding slider. The feeding slider and the feeding guide rail cooperate to guide the housing 31 to slide. The feeding drive member 311 can be a feeding motor, and a feeding screw is drivenly connected to the output end of the feeding motor. The feeding slider is threadedly connected to the feeding screw, and the feeding motor can drive the housing 31 to slide along the feeding guide rail.

[0045] In some specific embodiments, the shaping component includes a center pin 325. During the kneading operation, the center pin 325 is inserted into the center hole of the battery cell 6. The center pin 325 can ensure that the center hole of the battery cell 6 is not blocked by foreign objects during the kneading process. Specifically, the center pin 325 includes a rounded end. The center pin 325 is inserted into the center hole of the battery cell 6 at the rounded end, which helps to reduce the possibility of the center pin 325 damaging the battery cell 6, so as to protect the battery cell 6 during the kneading process.

[0046] A plurality of kneading rollers 321 are arranged around the outer periphery of the central needle 325. In some specific embodiments, a connecting seat 322 is provided on the kneading seat 32, and the kneading rollers 321 are rotatably mounted on the connecting seat 322. Specifically, a bearing 326 is provided on the connecting seat 322, and the kneading rollers 321 pass through the bearings 326, achieving a rotatable connection with the connecting seat 322 through the bearings 326. Furthermore, a front cover 323 and a rear cover 324 are respectively provided on both sides of the bearings 326. The front cover 323 and the rear cover 324 protect the bearings 326 to ensure smooth rotation of the kneading rollers 321. The front cover 323 includes a dustproof part 3231. The dustproof part 3231 has a curved cavity. The dustproof part 3231 forms a labyrinth-sealed design through the curved cavity, which can prevent foreign objects such as metal debris generated during the kneading process from entering the bearing 326, thereby causing the kneading wheel 321 to jam when rotating. The dustproof part 3231 plays an isolation role for the bearing 326.

[0047] Please see Figure 5 , Figure 8 and Figure 9 The kneading drive 33 can be disposed on the outer wall of the housing 31. The kneading drive 33 drives the kneading seat 32 to rotate, and the kneading seat 32 drives the center needle 325 and the kneading wheel 321 to rotate relative to the battery cell 6, thereby rotating the kneading tab. In some specific embodiments, a drive shaft 331 is disposed on one side of the kneading seat 32. The drive shaft 331 is rotatably disposed inside the housing 31. The drive shaft 331 can be a hollow shaft. A synchronous wheel 332 is sleeved on the outer side of the drive shaft 331. The kneading drive 33 is preferably, but not limited to, a kneading motor. A drive wheel is sleeved on the output end of the kneading motor. The drive wheel can drive the synchronous wheel 332 to rotate through a synchronous belt, thereby driving the drive shaft 331 and the kneading seat 32 to rotate.

[0048] Please see Figure 6 and Figure 8Furthermore, the outer casing 31 is equipped with a dust removal component 34 for timely removal of debris or dust generated during the smoothing of the battery cell 6. The dust removal component 34 includes a protective cover 341, which is mounted on the outer casing 31 and covers the smoothing seat 32, the smoothing wheel 321, and the center pin 325. The protective cover 341 has an insertion port 3411. When the transfer clamp 12 holds the battery cell 6 for smoothing, the battery cell 6 is inserted into the insertion port 3411, and the smoothing wheel 321 rotates and crushes the electrode tabs inside the protective cover 341. The protective cover 341 prevents debris and dust from flying. Meanwhile, a dust removal pipe 342 is provided on the protective cover 341, which is connected to the protective cover 341. The dust removal pipe 342 can be connected to an external air extraction device. When the air extraction device draws air from inside the protective cover 341 through the dust removal pipe 342, debris and dust can be collected into the dust removal pipe 342 with the airflow and discharged along the dust removal pipe 342. Specifically, the dust removal pipe 342 can be located tangent to the protective cover 341, which is conducive to the timely discharge of foreign objects inside the protective cover 341 and reduces the accumulation of foreign objects. It is understood that this is not the only limitation on the position of the dust removal pipe 342, and those skilled in the art can adjust it according to the rotation direction of the kneading seat 32.

[0049] In some specific embodiments, the flattening seat 32 is provided with fan blades 343, which are arranged perpendicularly to the flattening seat 32. When the flattening drive 33 drives the flattening seat 32 to rotate, the fan blades 343 generate airflow. When the air extraction speed of the air extraction device is greater than the airflow speed generated by the fan blades 343, foreign objects in the protective cover 341 can be quickly discharged through the dust removal pipe 342, which helps to enhance the effect of foreign object discharge. In addition, the flattening seat 32 is provided with an inner pipe 344, which passes through the flattening seat 32 and is connected to the drive shaft 331. The drive shaft 331 extends to the outside of the outer shell 31. Foreign objects can be discharged from the outer shell 31 through the inner pipe 344 and the drive shaft 331, reducing the possibility of foreign objects entering the inside of the battery cell 6 or the bearing 326, thereby reducing the impact of foreign objects on the flattening effect of the tabs.

[0050] Please see Figures 2-9 The battery cell 6 is fed onto the transfer clamp 12. The rotary drive 13 drives the rotating base 11 to rotate. The rotating base 11 first drives the transfer clamp 12 to rotate to the gathering station 112. The gathering drive 22 drives the gathering seat 21 to approach the battery cell 6. The electrode tab enters the forming groove 211. The gathering drive 22 drives the gathering seat 21 to squeeze the battery cell 6. The gathering seat 21 squeezes and gathers the electrode tab in the forming groove 211. The gathering drive 22 drives the gathering seat 21 to move away from the battery cell 6. The electrode tab is gathered and formed.

[0051] The rotary drive 13 drives the material clamp 12 to rotate to the kneading station 113 via the rotary base 11. The feed drive 311 drives the outer shell 31 to approach the battery cell 6. The battery cell 6 is inserted through the insertion port 3411 so that the electrode tab is inside the protective cover 341, and the center pin 325 is aligned with the center hole of the battery cell 6 and inserted into the center hole of the battery cell 6. The kneading drive 33 drives the transmission shaft 331 to rotate, and the transmission shaft 331 drives the kneading seat 32 to rotate. The kneading wheel 321 rotates on its own axis while the kneading seat 32 rotates. The kneading wheel 321 rotates relative to the electrode tab to crush and compact the electrode tab. In addition, the fan blade 343 generates airflow, and a negative pressure environment is formed in the dust removal pipe 342 to promptly discharge foreign objects generated during kneading from the protective cover 341 and the outer shell 31.

[0052] Example 3: The difference between this embodiment and the above embodiments is that, please refer to [link / reference needed]. Figure 1 , Figure 3 and Figure 4 In this embodiment, an edge positioning mechanism 4 is provided on one side of the gathering mechanism 2. The edge positioning mechanism 4 positions the battery cell 6 in the gathering station 112. When the rotating seat 11 drives the material transfer clamp 12 to rotate to the gathering station 112, the positions of different batches of battery cells 6 at the gathering station 112 may be inconsistent. By determining the position of the battery cell 6 through the edge positioning mechanism 4, the rotation speed and rotation time of the flattening drive 33 driving the flattening seat 32 to rotate, as well as the feeding speed and feeding amount of the feeding drive 311 driving the outer shell 31 to move, can be adjusted to ensure that the exposed dimensions of the electrode tab to the diaphragm are consistent after the battery cell 6 is flattened by the flattening mechanism 3, and the total height of the battery cell 6 is consistent after flattening.

[0053] In a preferred embodiment, the edge positioning mechanism 4 includes a floating probe 41, which is disposed on one side of the gathering seat 21. The floating probe 41 extends out and passes through the forming groove 211 to contact the battery cell 6. Specifically, the floating probe 41 includes a contact portion 411 for contacting the battery cell 6. The contact portion 411 is annular. There may be a poor alignment between the starting and ending points of the battery cell 6 winding. In this case, the alignment of the battery cell 6 at the center is relatively good and flat. The annular contact portion 411 can contact the center of the battery cell 6, which can better reflect the position of the battery cell 6 and improve the positioning accuracy of the edge positioning mechanism 4.

[0054] A sensor 42 is provided on one side of the floating probe 41. The sensor 42 is preferably, but not limited to, a region-to-area sensor. When the floating probe 41 passes through the molding groove 211 and approaches the battery cell 6, the sensor 42 can detect the position change of the battery cell 6. The method by which the sensor 42 detects the position of the battery cell 6 is known to those skilled in the art and is achievable. It will not be described in detail in this embodiment.

[0055] Specifically, during the debugging phase, the edge positioning mechanism 4 first positions the standard battery cell 6 that has passed the leveling test, and the value measured by the sensor 42 is used as the reference value. During the leveling production process of the battery cell 6, the rotary table 11 drives the transfer clamp 12 to rotate to the gathering station 112. The battery cell 6 first undergoes positioning detection. The floating probe 41 extends and presses against the center of the battery cell 6. The sensor 42 determines the position of the battery cell 6 by detecting the position of the floating probe 41. By comparing the deviation of the position of the battery cell 6 from the reference value, and combining it with the CCD detection of the height of the battery cell 6, the diaphragm width, and the exposed size of the electrode tab, the feed amount of the feed drive 311 can be calculated for leveling compensation to ensure the consistency of the leveling of the battery cell 6. After the edge positioning mechanism 4 completes the positioning detection of the battery cell 6, the floating probe 41 retracts back to its original position, and the gathering drive 22 drives the gathering seat 21 to approach the battery cell 6 to squeeze and gather the electrode tab.

[0056] During the leveling compensation, the compensation amounts of the two feed drive units 311 change simultaneously, and the feed compensation directions are opposite. The leveling mechanism 3 positions the battery cell 6 through the edge positioning mechanism 4, determines the positional changes of the battery cell 6, and can adjust various parameters of the leveling operation to improve the accuracy and quality of leveling, thus solving the problem that the positional shift of the battery cell 6 caused by gripping and handling affects the leveling quality.

[0057] Example 4: The difference between this embodiment and the above embodiments is that, please refer to [link / reference needed]. Figure 1 and Figure 2 In this embodiment, the outer side of the rotary table 11 is provided with a conveying station 111 for feeding or discharging the battery cell 6. The rotary drive 13 drives the transfer clamp 12 to rotate cyclically between the conveying station 111, the gathering station 112, and the flattening station 113 via the rotary table 11. In some specific embodiments, a material sensor for detecting whether the battery cell 6 has been fed into the correct position is provided on one side of the rotary table 11. The material sensor is located at the conveying station 111. When the material sensor detects that the battery cell 6 has been fed into the transfer clamp 12 of the conveying station 111, the rotary table 11 can drive the transfer clamp 12 to rotate from the conveying station 111 to the gathering station 112. Specifically, the material sensor can be a photoelectric sensor.

[0058] Specifically, a buffer station 114 is provided on the outer side of the rotary table 11. The battery cell 6 is loaded from the conveyor station 111 onto the transfer clamp 12. The transfer clamp 12 rotates with the rotary table 11, sequentially moving the battery cell 6 to the gathering station 112, the flattening station 113, and the buffer station 114. After the gathering and flattening operations are completed, the battery cell 6 is finally unloaded from the conveyor station 111. The rotary drive 13 drives the rotary table 11 and the transfer clamp 12 to rotate, allowing the battery cell 6 to quickly switch to each station. This saves time on multiple handling and positioning of the battery cell 6, achieves process continuity, and improves production efficiency. At the same time, multiple gripping and handling can easily cause the battery cell 6 to shift position, affecting the flattening quality and increasing the risk of surface contamination or damage to the battery cell 6. By using the transfer clamp 12 to hold and drive the battery cell 6 to each station, the possibility of deformation of the battery cell 6 or damage to the diaphragm caused by multiple gripping or collisions can be reduced.

[0059] Please see Figure 1 and Figure 10 The rotary table 11 is equipped with a conveying mechanism 5 for conveying the battery cells 6 at the conveying station 111. In a preferred embodiment, a support frame 14 is provided on one side of the rotary table 11, and the rotary table is rotatably mounted on the support frame 14. The conveying mechanism 5 includes a receiving clamp 51, which is mounted on the support frame 14. The receiving clamp receives and holds the wound battery cells 6. Specifically, a feeding assembly 53 for unloading the wound battery cells 6 is provided on one side of the receiving clamp 51, and the receiving clamp 51 receives the battery cells 6 unloaded by the feeding assembly 53.

[0060] In some specific embodiments, a transverse shift seat 511 is provided on one side of the receiving clamp 51. The receiving clamp 51 is disposed on the transverse shift seat 511. The transverse shift seat 511 is connected to a transverse shift drive member 512 for driving the transverse shift seat 511 to approach or move away from the unloading assembly 53. The transverse shift drive member 512 is preferably, but not limited to, a transverse shift cylinder. When the battery cell 6 is unloaded, the transverse shift drive member 512 drives the transverse shift seat 511 and the receiving clamp 51 to approach the unloading assembly 53. The battery cell 6 is unloaded from the unloading assembly 53 onto the receiving clamp 51. The receiving clamp 51 holds the battery cell 6. Then, the transverse shift drive member 512 drives the transverse shift seat 511 and the receiving clamp 51 to reset, and the battery cell 6 moves away from the unloading assembly 53.

[0061] Please see Figure 1 and Figure 11 In some specific embodiments, a winding needle unloading station 7 for winding and unloading the battery cell 6 is provided on one side of the unloading assembly 53. The unloading assembly 53 receives and conveys the battery cell 6 unloaded from the winding needle unloading station 7. The unloading assembly 53 includes an unloading shaft 531, which is connected to an unloading rotation drive component. The unloading rotation drive component is preferably, but not limited to, an unloading motor. A drive wheel is sleeved on the unloading shaft 531, and the unloading motor drives the unloading shaft 531 to rotate via the drive wheel.

[0062] The unloading shaft 531 is equipped with an unloading clamp 532 for holding the battery cell 6. The unloading rotation drive drives the unloading clamp 532 to rotate, allowing it to move from the winding needle unloading station 7 to the receiving clamp 51, where the battery cell 6 is wound and unloaded. Specifically, multiple unloading clamps 532 are provided. When the unloading rotation drive drives the unloading shaft 531 to rotate, the unloading shaft 531 can drive multiple unloading clamps 532 to sequentially dock with the receiving clamp 51, achieving continuous unloading and conveying of the battery cell 6 to improve production efficiency.

[0063] Furthermore, a mounting plate 534 is provided on the unloading shaft 531, and the unloading clamp 532 is slidably mounted on the mounting plate 534. Specifically, the unloading clamp 532 is drivenly connected to a gap adjusting component 533, which includes an adjusting drive component. The adjusting drive component is preferably, but not limited to, an adjusting cylinder. The adjusting drive component drives the unloading clamp 532 to move, and the gap between multiple unloading clamps 532 can be adjusted. The gap adjusting component 533 allows the unloading clamp 532 to adapt to different distances between the needle winding unloading station 7 and the receiving clamp 51, and plays the role of transmitting the battery cell 6 between the needle winding unloading station 7 and the receiving clamp 51. An adjusting guide rail is provided on the mounting plate 534, and an adjusting slider is slidably mounted on the adjusting guide rail. The unloading clamp 532 is mounted on the adjusting slider. When the adjusting drive component drives the unloading clamp 532 to move, the unloading clamp 532 drives the adjusting slider to slide along the adjusting guide rail. The adjusting slider and the adjusting guide rail guide the unloading clamp 532.

[0064] After the feed clamp 532 holds the battery cell 6 fed from the bobbin unloading station 7, the transverse drive 512 drives the receiving clamp 51 to move to the unloading assembly 53 via the transverse seat 511. The unloading rotation drive drives the unloading shaft 531 to rotate, and the unloading shaft 531 drives the feed clamp 532 to rotate to the receiving clamp 51. The feed clamp 532 releases the battery cell 6, and the battery cell 6 is transferred into the receiving clamp 51. The receiving clamp 51 holds the battery cell 6, and the transverse drive 512 drives the transverse seat 511 and the receiving clamp 51 to reset. The battery cell 6 is transferred to the receiving clamp 51.

[0065] Please see Figure 1 and Figure 12An outward transfer component 52 is provided on the support frame 14. The outward transfer component 52 transfers the battery cell 6 received by the receiving rack to the transfer clamp 12. In some specific embodiments, the outward transfer component 52 includes a transfer plate 523, which is driven by a horizontal transfer drive component 525. The horizontal transfer drive component 525 drives the transfer plate 523 to move closer to or away from the transfer station 111. Specifically, the horizontal transfer drive component 525 is preferably, but not limited to, a horizontal linear module. A lifting plate 526 is slidably provided on the transfer plate 523. The lifting plate 526 is driven by a lifting transfer drive component 524. Specifically, the lifting transfer drive component 524 can be a lifting cylinder. The lifting transfer drive component 524 drives the lifting plate 526 to move up and down relative to the transfer plate 523. The lifting plate 526 can enter or exit the transfer station 111. The lifting plate 526 is provided with a first transfer clamp 521 and a second transfer clamp 522 for clamping the battery cell 6. The first transfer clamp 521 and the second transfer clamp 522 can be arranged at intervals along the moving direction of the transfer plate 523.

[0066] A conveyor line 54 for conveying the kneaded battery cells 6 is provided on one side of the support frame 14. A first transfer clamp 521 conveys the battery cells 6 between the receiving clamp 51 and the transfer clamp 12, and a second transfer clamp 522 conveys the battery cells 6 between the transfer clamp 12 and the conveyor line 54. Specifically, the conveyor line 54 includes a conveyor seat 541, on which multiple slots 542 are provided. The multiple slots 542 are arranged along the conveying direction of the conveyor seat 541. The slots 542 can be V-shaped slots, and the battery cells 6 are placed in the slots 542 for conveying.

[0067] Specifically, after receiving the battery cell 6 from the unloading assembly 53, the horizontal transfer drive 525 drives the transfer plate 523 to move horizontally. The first transfer clamp 521 moves to the receiving clamp 51, while the second transfer clamp 522 moves to the conveying station 111. The lifting transfer drive 524 drives the lifting plate 526 to descend, and the first transfer clamp 521 approaches the receiving clamp 51. The receiving clamp 51 releases the battery cell 6, and the first transfer clamp 521 clamps the battery cell 6, transferring it from the receiving clamp 51 to the first transfer clamp 521. The second transfer clamp 522 then grabs the battery cell 6 held by the transfer clamp 12 at the conveying station 111, which has already undergone a flattening operation. The lifting transfer drive 524 drives the lifting plate 526 to rise, and the first transfer clamp 521 moves away from the receiving clamp 51, while the second transfer clamp 522 moves away from the transfer clamp 12.

[0068] The horizontal moving drive drives the transfer plate 523 to move horizontally. The first transfer clamp 521 moves to the conveying station 111, and the second transfer clamp 522 moves to the conveyor line 54. The lifting moving drive drives the first transfer clamp 521 and the second transfer clamp 522 to descend. The first transfer clamp 521 can transfer the battery cell 6 to be flattened to the transfer clamp 12. The second transfer clamp 522 can place the flattened battery cell 6 into the tray 542. The battery cell 6 is discharged through the conveyor line 54.

[0069] Please see Figures 1-12 After the flattened battery cell 6 is transferred to the transfer clamp 12, the rotary drive 13 drives the rotating base 11 to rotate. The rotating base 11 drives the transfer clamp 12 to rotate the flattened battery cell 6 into the gathering station 112. The floating probe 41 extends and contacts the end face of the battery cell 6, and the sensor 42 detects the position of the battery cell 6. After the battery cell 6 is positioned, the gathering drive 22 drives the gathering seat 21 to approach the battery cell 6. The gathering seat 21 presses the gathering tab at the forming groove 211, and the gathering drive 22 then drives the gathering seat 21 to return to its original position. The rotary table 11 drives the transfer clamp 12 to rotate the gathered battery cells 6 into the flattening station 113. The feed drive 311 drives the housing 31 and the flattening seat 32 to approach the battery cells 6. The battery cells 6 are inserted into the socket 3411. The flattening drive 33 drives the flattening seat 32 to rotate. The flattening wheel 321 rotates on its own axis as the flattening seat 32 rotates, and the flattening wheel 321 rotates and flattens the tabs. At the same time, the dust removal component 34 discharges the debris or dust generated during the flattening of the tabs. After the battery cells 6 are flattened, the feed drive 311 drives the housing 31 and the flattening seat 32 to reset. The rotary table 11 drives the transfer clamp 12 to rotate to the slow-down position and re-enters the conveying station 111. The second transfer clamp 522 can transfer the flattened battery cells 6 into the tray 542 for unloading and conveying.

[0070] With the cooperation of the conveying mechanism 5 and the rotating mechanism 1, the unloading action of the battery cell 6 after winding is integrated with the flattening process. Compared with the independent flattening device and its matching handling robot and control system, it is beneficial to simplify the equipment, reduce the equipment manufacturing cost, floor space and maintenance cost. At the same time, it can reduce the number of times the battery cell 6 is gripped and handled and the waiting time. After the battery cell 6 is unloaded from the winding needle unloading station 7, it does not need to be repositioned, which improves production efficiency and effectively reduces the risk of deformation and diaphragm damage caused by clamping or collision of the battery cell 6.

[0071] Example 5: This embodiment, based on the above embodiments, provides a method for flattening a full-tab battery cell. Please refer to [link to relevant documentation]. Figures 1-12 Using the above-mentioned full-tab cell flattening device helps to reduce the phenomenon of tabs turning outward and optimize the process flow.

[0072] The method for flattening the omnipolar battery cell of the present invention includes the following steps: The battery cell 6 is fed into the transfer clamp 12. In some specific embodiments, the unloading assembly 53 receives the battery cell 6 wound at the winding needle unloading station 7. Specifically, the unloading shaft 531 drives the unloading clamp 532 to rotate to the winding needle unloading station 7. The unloading clamp 532 grabs the battery cell 6 unloaded from the winding needle unloading station 7. The unloading rotation drive drives the unloading shaft 531 to rotate. The unloading shaft 531 drives the unloading clamp 532 to rotate to the receiving clamp 51. The unloading clamp 532 is released, the receiving clamp 51 grabs the battery cell 6, and the lateral movement drive 512 drives the receiving clamp 51 away from the receiving clamp 51 to reset.

[0073] The horizontal transfer drive 525 drives the first transfer clamp 521 to move horizontally to approach the receiving clamp 51. The lifting transfer drive 524 drives the first transfer clamp 521 to descend. The first transfer clamp 521 grabs the battery cell 6 on the receiving clamp 51. The receiving clamp 51 releases the battery cell 6, and the battery cell 6 is transferred to the first transfer clamp 521.

[0074] The lifting and transferring drive 524 drives the first transferring clamp 521 to rise and reset. The horizontal transferring drive 525 drives the first transferring clamp 521 to enter the conveying station 111. The lifting and transferring drive 524 drives the first transferring clamp 521 to descend again. The transfer clamp 12 opens and the first transferring clamp 521 places the battery cell 6 into the transfer clamp 12. The battery cell 6 is transferred to the transfer clamp 12. After the battery cell 6 is transferred, the lifting and transferring drive 524 drives the first transferring clamp 521 to rise and reset. After the battery cell 6 is accurately positioned on the winding needle, the conveying mechanism 5 conveys the battery cell 6 to the rotating mechanism 1. The battery cell 6 has a stable posture and no external interference. The transfer clamp 12 rotates to the gathering station 112, and the rotary drive 13 drives the rotating base 11 to rotate. The rotating base 11 drives the transfer clamp 12 to rotate from the conveying station 111 to the gathering station 112. The gathering mechanism 2 pre-presses and gathers the electrode tabs. Specifically, the battery cell 6 is first positioned by the edge positioning mechanism 4, the floating probe 41 extends and contacts the center of the battery cell 6, the sensor 42 detects the position change of the battery cell 6, and then the gathering drive 22 drives the gathering seat 21 to approach the battery cell 6. The gathering seat 21 squeezes the battery cell 6 through the forming groove 211 to gather the electrode tabs. The transfer clamp 12 rotates to the flattening station 113, and the flattening mechanism 3 rotates to flatten the electrode tabs. Specifically, the rotation drive 13 drives the transfer clamp 12 to rotate from the gathering station 112 to the flattening station 113. Before flattening the electrode tabs, the edge positioning mechanism 4 determines the position change of the battery cell 6. The flattening mechanism 3 can then perform flattening feed compensation on the battery cell 6. Compared with the traditional flattening device, which requires multiple positioning after the material is unloaded at the needle winding unloading station 7, this method can reduce the error caused by multiple positioning, ensure the perpendicularity of the flattening wheel 321 to the axis of the battery cell 6, and the uniformity of the flattening depth.

[0075] In some specific embodiments, the feed drive 311 drives the outer shell 31 to approach the battery cell 6, so that the battery cell 6 is inserted into the protective cover 341, the center pin 325 is inserted into the center hole of the battery cell 6, the flattening drive 33 drives the flattening seat 32 to rotate, the flattening seat 32 drives the flattening wheel 321 to rotate, the flattening wheel 321 rotates to flatten the electrode tab, the electrode tab is subjected to uniform force during the flattening process, ensuring the flattening consistency, thereby improving the problem of electrode tabs turning outward.

[0076] The rotary drive 13 drives the transfer clamp 12 to rotate into the slow-moving station 114 via the turntable 11, and finally returns to the conveying station 111. The lifting and lowering transfer drive 524 drives the second transfer clamp 522 to grab the battery cell 6 that has completed the flattening operation on the transfer clamp 12. The horizontal transfer drive 525 drives the second transfer clamp 522 to move closer to the conveyor line 54, and the battery cell 6 that has completed the flattening operation is conveyed and unloaded on the conveyor line 54. Repeating the above steps, the battery cell 6 completes the flattening operation after winding in sequence.

[0077] Compared to the traditional method where a robotic arm picks up the battery cell 6 from the winding and unloading station 7 and transports it to the flattening device, where the battery cell 6 is positioned and then flattened, the flattening station 113 integrates the unloading action of the battery cell 6, enabling the integrated operation of winding and flattening the battery cell 6. This ensures the continuity of the process and the overall production cycle time, reduces the additional time for handling and positioning the battery cell 6, and improves production efficiency.

[0078] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0079] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0080] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0081] In this invention, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0082] Although the description of the invention has been given in conjunction with the specific embodiments described above, it will be apparent to those skilled in the art that many substitutions, modifications, and variations can be made based on the foregoing. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A device for flattening omnipolar battery cells, characterized in that, include: The rotating mechanism (1) includes a rotating base (11), with a gathering station (112) and a kneading station (113) provided on the outer side of the rotating base (11). A material transfer clamp (12) is provided on the rotating base (11), which clamps the battery cell (6). The rotating base (11) is connected to a rotating drive member (13) for driving the rotating base (11) to rotate. The rotating drive member (13) drives the material transfer clamp (12) to rotate to the gathering station (112) or the kneading station (113) via the rotating base (11). A gathering mechanism (2) is provided at the gathering station (112). The gathering mechanism (2) includes a gathering seat (21) located at one end of the transfer clamp (12). The gathering seat (21) is provided with a forming groove (211) for gathering the electrode tabs. A kneading mechanism (3) is provided at the kneading station (113). The kneading mechanism (3) includes a kneading seat (32). The kneading seat (32) is connected to a kneading drive member (33) for driving the kneading seat (32) to rotate. The kneading seat (32) is provided with a shaping component for rotating and kneading the tab.

2. The omnipolar tab cell flattening device according to claim 1, characterized in that, The gathering seat (21) is connected to a gathering drive (22), which drives the gathering seat (21) to move closer to or away from the transfer clamp (12).

3. The omnipolar tab cell flattening device according to claim 1, characterized in that, A housing (31) is provided on one side of the kneading seat (32). The kneading seat (32) is rotatably mounted on the housing (31). The housing (31) is connected to a feeding drive (311) for driving the housing (31) to move closer to or away from the material transfer clamp (12). The shaping component includes: A plurality of kneading rollers (321) are provided, and the plurality of kneading rollers (321) are rotatably mounted on the kneading base (32); and The center needle (325) is located on the inner side of the kneading wheel (321).

4. The omnipolar tab cell flattening device according to claim 1, characterized in that, An edge positioning mechanism (4) is provided on one side of the gathering mechanism (2), and the edge positioning mechanism (4) positions the battery cell (6) in the gathering station (112).

5. The omnipolar tab cell flattening device according to claim 1, characterized in that, The outer side of the turntable (11) is provided with a conveying station (111) for feeding or discharging the battery cell (6). The transfer clamp (12) rotates cyclically between the conveying station (111), the gathering station (112), and the flattening station (113). The turntable (11) is provided with a conveying mechanism (5) for conveying the battery cell (6) at the conveying station (111).

6. The omnipolar tab cell flattening device according to claim 5, characterized in that, A support frame (14) is provided on one side of the rotating base (11), and the rotating base (11) is rotatably mounted on the support frame (14); The transmission mechanism (5) includes: A receiving clamp (51) is disposed on the support frame (14), and the receiving clamp (51) receives the wound battery cell (6); and An outward transfer component (52) is located on one side of the support frame (14). The outward transfer component (52) transfers the battery cell (6) received by the receiving clamp (51) to the transfer clamp (12).

7. The omnipolar tab cell flattening device according to claim 6, characterized in that, The receiving clamp (51) is provided with a feeding component (53) on one side for feeding the wound battery cell (6), and the receiving clamp (51) receives the battery cell (6) fed by the feeding component (53).

8. The omnipolar tab cell flattening device according to claim 7, characterized in that, The feeding assembly (53) includes a feeding shaft (531), which is connected to a feeding rotation drive. The shaft is provided with a feeding clamp (532) for holding the battery cell (6). The feeding rotation drive drives the feeding clamp (532) to rotate to the receiving clamp (51) via the shaft.

9. The omnipolar tab cell flattening device according to claim 7, characterized in that, One side of the support frame (14) is provided with a conveyor line (54) for conveying the flattened battery cell (6); The external transfer assembly (52) includes a first transfer clamp (521) and a second transfer clamp (522), wherein the first transfer clamp (521) transfers the battery cell (6) between the receiving clamp (51) and the transfer clamp (12), and the second transfer clamp (522) transfers the battery cell (6) between the transfer clamp (12) and the conveyor line (54).

10. A method for flattening a omnipolar battery cell, characterized in that, The method for flattening a omnipolar battery cell using the omnipolar battery cell flattening device as described in claims 1-9 includes the following steps: Load the battery cell (6) into the transfer clamp (12); The transfer clamp (12) rotates, and the battery cell (6) rotates to the gathering station (112). The gathering seat (21) is pre-pressed to gather the electrode tabs through the forming groove (211). The transfer clamp (12) rotates, the battery cell (6) rotates to the flattening station (113), the flattening seat (32) rotates, and the shaping component rotates to flatten the electrode tabs.

Images