Pole piece misalignment lug lamination equipment and misalignment lamination process

Abstract

The present application relates to a kind of polar piece misregistration tab lamination equipment and misregistration lamination process, including carousel, polar piece supply unit, transfer manipulator and hot-pressing unit;Multiple fixtures with positioning slot are provided on carousel, and have polar piece loading station, transition station, hot-pressing station and discharge station;Polar piece supply unit includes positive polar piece supply mechanism and negative polar piece supply mechanism symmetrically arranged on the two sides of polar piece loading station;Transfer manipulator is arranged above polar piece loading station, including two synchronously movable suction components, suction component includes rotary drive module and discharge suction head, rotary drive module can drive discharge suction head to rotate preset angle to make polar piece misregistration stacking;Hot-pressing unit includes upper hot-pressing mechanism and lower hot-pressing mechanism that can be inserted into positioning slot for double-sided hot-pressing.The present application realizes the automatic alternation of positive and negative polar piece stacking and misregistration arrangement, and makes polar piece group evenly heated by upper and lower synchronous hot-pressing, improves lamination precision and hot-pressing forming quality.

Description

Technical Field

[0001] This invention relates to the field of battery cell processing equipment technology, and in particular to an electrode tab stacking equipment with misaligned electrodes and a misaligned stacking process. Background Technology

[0002] In the production process of lithium battery cells, positive and negative electrode sheets need to be stacked alternately, and the tabs of adjacent electrode sheets need to be staggered at a certain angle to facilitate subsequent welding or packaging processes. At the same time, the staggered arrangement is beneficial to the uniform stress and interlayer bonding of the tab area during hot pressing.

[0003] Currently, the staggered stacking of electrode sheets largely relies on manual operation. Operators must place the positive and negative electrode sheets one by one at a specific angle in a fixture, and then transfer the entire fixture to a hot-pressing machine for hot pressing. This method has the following drawbacks: First, manual stacking makes it difficult to ensure that the staggered angle of each electrode sheet is consistent, and the stacking accuracy is greatly affected by the operator's skill level, resulting in poor product consistency. Second, during the transfer of the stacked electrode sheets from the fixture to the hot-pressing machine, the stacked electrode sheets are prone to interlayer misalignment due to movement or vibration, further affecting the quality of the final battery cell. Existing automated stacking equipment can only achieve simple alignment and stacking of electrode sheets, and it is difficult to accurately control the rotation angle of each electrode sheet to achieve staggered electrode tab stacking, thus failing to meet the automated stacking production requirements of staggered electrode tab battery cells. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide an electrode tab stacking device and a staggered stacking process.

[0005] The present invention adopts the following technical solution:

[0006] An electrode lamination device with misaligned electrode tabs includes: A turntable is provided with multiple fixtures, each fixture having a positioning groove for stacking positive and negative electrode sheets; the turntable has an electrode sheet loading station, a transition station, a hot pressing station, and a discharge station, and the turntable is used to drive the fixtures to circulate between the electrode sheet loading station, the transition station, the hot pressing station, and the discharge station; The electrode feeding unit includes a positive electrode feeding mechanism and a negative electrode feeding mechanism symmetrically arranged on both sides of the electrode feeding station; A transfer robot is positioned above the electrode loading station. The transfer robot includes a first linear drive mechanism, a first lifting drive mechanism, and two suction components. The first linear drive mechanism and the first lifting drive mechanism drive the two suction components to move horizontally and lift synchronously. The two suction components alternately pick up positive and negative electrode sheets and place them in the positioning slot. Each suction component includes a rotary drive module and a discharge suction head located below the rotary drive module. The rotary drive module drives the discharge suction head to rotate by a preset angle so that the picked-up positive or negative electrode sheets are stacked in a staggered manner. The hot pressing unit includes an upper hot pressing mechanism and a lower hot pressing mechanism that are disposed opposite to each other above and below the hot pressing station; the upper hot pressing mechanism and the lower hot pressing mechanism extend into the positioning groove of the fixture respectively to perform double-sided hot pressing; The finished product unloading unit includes a finished product lifting mechanism and a finished product unloading robot that are respectively arranged above and below the unloading station; the finished product lifting mechanism is used to push the finished product out of the positioning groove, and the finished product unloading robot is used to take out the lifted finished product.

[0007] Preferably, the positioning groove includes a body receiving groove, a positive electrode receiving groove, and a negative electrode receiving groove that are connected to each other; the positive electrode receiving groove and the negative electrode receiving groove are symmetrically arranged on both sides of the body receiving groove; the cross-sectional shape of the body receiving groove is circular, and the cross-sectional shape of the positive electrode receiving groove and the negative electrode receiving groove is fan-shaped.

[0008] Preferably, the body receiving groove extends vertically, and the bottom of the positive electrode receiving groove and the negative electrode receiving groove are provided with a support plate.

[0009] Preferably, the positive electrode feeding mechanism includes a positive electrode box, a positive electrode correction component, and a positive electrode picking robot; the positive electrode box is used to store positive electrode sheets, the positive electrode picking robot is used to move the positive electrode sheets from the positive electrode box to the positive electrode correction component, and the positive electrode correction component is used to correct the position of the positive electrode sheets; the negative electrode feeding mechanism includes a negative electrode box, a negative electrode correction component, and a negative electrode picking robot; the negative electrode box is used to store negative electrode sheets, the negative electrode picking robot is used to move the negative electrode sheets from the negative electrode box to the negative electrode correction component, and the negative electrode correction component is used to correct the position of the negative electrode sheets.

[0010] Preferably, the positive electrode correction component and the negative electrode correction component have the same structure. Both the positive electrode correction component and the negative electrode correction component include a support bracket, a correction fixing seat, a correction movable block, and a correction driving component. The correction fixing seat is fixed to the support bracket, the correction movable block is movably connected to the support bracket, and the correction driving component is fixed to the support bracket and is drively connected to the correction movable block. The correction fixing seat is provided with a first calibration groove, and the correction movable block is provided with a second calibration groove. The correction driving component drives the correction movable block to move toward the correction fixing seat, so that the first calibration groove and the second calibration groove are joined to form a calibration groove for correction position.

[0011] Preferably, the positive electrode picking robot and the negative electrode picking robot have the same structure. Both the positive electrode picking robot and the negative electrode picking robot include a second linear drive mechanism, a second lifting drive mechanism, a support frame, and a picking suction head. The picking suction head is fixed on the support frame. The second linear drive mechanism and the second lifting drive mechanism are used to drive the support frame to move horizontally and lift vertically.

[0012] Preferably, the feeding suction head includes a main adsorption part and an electrode adsorption part disposed on one side of the main adsorption part.

[0013] Preferably, the upper hot pressing mechanism includes a connecting frame, a lifting drive module, a lifting block, and a first hot pressing module; the lifting drive module is fixed on the connecting frame, the lifting block is drivenly connected to the lifting drive module, and the first hot pressing module is fixed to the bottom of the lifting block; the lower hot pressing mechanism includes a lifting drive module and a second hot pressing module, and the second hot pressing module is drivenly connected to the lifting drive module.

[0014] Preferably, the first hot pressing module includes a first heat insulation plate, a first heat-conducting block, and a first hot pressing head; the first heat insulation plate is fixed to the bottom of the lifting block, the first heat-conducting block is fixed to the bottom of the first heat insulation plate, and the first hot pressing head is integrally formed on the bottom of the first heat-conducting block; a first heating element is provided inside the first heat-conducting block; the second hot pressing module includes a second heat insulation plate, a second heat-conducting block, and a second hot pressing head; the second heat insulation plate is drively connected to the lifting drive module, the second heat-conducting block is fixed to the top of the second heat insulation plate, and the second hot pressing head is integrally formed on the top of the second heat-conducting block; a second heating element is provided inside the second heat-conducting block.

[0015] A staggered lamination process, based on the aforementioned staggered electrode tab lamination equipment, includes the following steps: S1. Positive electrode sheet feeding: The transfer robot picks up the positive electrode sheet output by the positive electrode sheet feeding mechanism, the rotary drive module drives the feeding suction head to rotate the picked-up positive electrode sheet by a preset angle, and then places the positive electrode sheet into the positioning groove of the fixture; S2. Negative electrode sheet feeding: The transfer robot picks up the negative electrode sheet output by the negative electrode sheet feeding mechanism, the rotary drive module drives the feeding suction head to rotate the picked-up negative electrode sheet by a preset angle, and then places the negative electrode sheet into the positioning groove of the fixture; S3. Alternately cycle steps S1 and S2 to form an electrode group in the positioning groove in which positive and negative electrode sheets are stacked alternately; wherein, the positive and negative electrode tabs of the electrode group are symmetrically distributed in the projection direction; and the positive electrode tabs that are adjacent to each other on the same side are staggered, and the negative electrode tabs that are adjacent to each other on the same side are staggered. S4. Double-sided hot pressing: The turntable rotates the fixture carrying the electrode assembly to the hot pressing station. The upper hot pressing mechanism and the lower hot pressing mechanism extend into the positioning groove respectively to perform double-sided hot pressing on the electrode assembly to form a finished product. S5. Discharge: The turntable rotates the fixture carrying the finished product to the discharge station, and the finished product discharge unit removes the finished product from the positioning slot.

[0016] The beneficial effects of this invention are as follows: The electrode stacking equipment and process involving misaligned tabs of the present invention circulates between the electrode loading station, transition station, hot pressing station, and unloading station via a turntable-driven fixture. Electrode feeding units are symmetrically arranged on both sides of the electrode loading station, and a transfer robot is positioned above the electrode loading station, realizing automated continuous operation of electrode stacking, hot pressing, and finished product unloading. The transfer robot drives two suction components to move synchronously via a first linear drive mechanism and a first lifting drive mechanism. The two suction components alternately pick up positive electrode sheets output from the positive electrode feeding mechanism and negative electrode sheets output from the negative electrode feeding mechanism, placing the picked-up electrode sheets into the positioning slots of the fixture to complete the alternating stacking of positive and negative electrode sheets. The rotation drive module of the suction components drives the unloading suction head to rotate by a preset angle, ensuring that each electrode sheet is stacked in a misaligned posture, guaranteeing the misaligned arrangement of the tabs of adjacent electrode sheets. The upper and lower hot pressing mechanisms of the hot pressing unit extend from above and below the positioning groove of the fixture to perform double-sided hot pressing. The synchronous hot pressing from top to bottom makes the electrode assembly more uniformly heated and the hot pressing forming quality is higher. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the electrode misalignment tab stacking device of the present invention; Figure 2 This is a schematic diagram of the fixture in this invention; Figure 3This is a schematic diagram of the positive electrode correction component in this invention; Figure 4 This is a schematic diagram of the transfer robot in the present invention; Figure 5 This is a schematic diagram of the material suction component in this invention; Figure 6 This is a schematic diagram of the hot-pressing unit in this invention; Figure 7 This is a schematic diagram of the finished product discharge unit in this invention; Figure 8 This is a schematic diagram of the structure of the electrode group corresponding to the electrode tab stacking device of the present invention; Figure 9 This is a schematic diagram of the staggered lamination process of the present invention.

[0018] Numbering on the map: 10-Turntable; 20-Jig; 21-Positioning slot; 22-Body receiving slot; 23-Positive electrode tab receiving slot; 24-Negative electrode tab receiving slot; 25-Pattern; 30-Positive electrode sheet feeding mechanism; 31-Positive electrode material box; 32-Positive electrode correction component; 321-Support bracket; 322-Correction fixing seat; 323-Correction movable block; 324-Correction drive component; 325-First calibration slot; 326-Second calibration slot; 33-Positive electrode picking robot; 331-Second linear drive mechanism; 332-Second lifting drive mechanism; 333-Support frame; 334-Pickup suction head; 40-Negative electrode sheet feeding mechanism; 41-Negative electrode material box; 42-Negative electrode correction component; 43-Negative electrode picking robot; 50-Transfer robot; 51-First linear drive mechanism; Drive mechanism; 52-First lifting drive mechanism; 53-Suction component; 531-Rotation drive module; 532-Discharge suction head; 533-Main body adsorption part; 534-Electrode tab adsorption part; 60-Upper hot pressing mechanism; 61-Connecting frame; 62-Lifting drive module; 63-Lifting block; 64-First hot pressing module; 641-First heat insulation plate; 642-First heat conducting block; 643-First hot pressing head; 70-Lower hot pressing mechanism; 71-Lifting drive module; 72-Second hot pressing module; 721-Second heat insulation plate; 722-Second heat conducting block; 723-Second hot pressing head; 80-Finished product discharge robot; 90-Finished product lifting mechanism; 91-Lifting drive module; 92-Lifting protrusion; 100-Positive electrode sheet; 200-Negative electrode sheet. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "vertical direction," "up," "down," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication 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.

[0022] like Figures 1 to 7 As shown, the electrode lamination device of the present invention includes a turntable 10, a fixture 20, an electrode feeding unit, a transfer robot 50, a hot pressing unit, and a finished product discharge unit. The turntable 10 has an electrode feeding station, a transition station, a hot pressing station, and a discharge station. The turntable 10 can rotate around its own axis, driving the fixture 20 to circulate between the electrode feeding station, the transition station, the hot pressing station, and the discharge station, realizing the material flow between each process. During processing, the electrode feeding unit outputs the positive electrode 100 and the negative electrode 200 to the electrode loading station respectively. The transfer robot 50 alternately picks up the positive electrode 100 and the negative electrode 200 and stacks them in a staggered manner into the positioning groove 21 of the fixture 20 to form an electrode assembly. The turntable 10 rotates the fixture 20 carrying the electrode assembly to the hot pressing station, where the hot pressing unit performs double-sided hot pressing on the electrode assembly to form a finished product. The turntable 10 rotates the fixture 20 carrying the finished product to the unloading station, where the finished product unloading unit removes the finished product.

[0023] Please see Figure 1 and Figure 2The turntable 10 is equipped with multiple fixtures 20, which are evenly distributed around the circumference of the turntable 10, so that each fixture 20 moves synchronously to the next workstation after each rotation of the turntable 10. Each fixture 20 has a positioning groove 21 for stacking positive electrode plates 100 and negative electrode plates 200. The positioning groove 21 includes a connected body receiving groove 22, a positive electrode tab receiving groove 23, and a negative electrode tab receiving groove 24. The positive electrode tab receiving groove 23 and the negative electrode tab receiving groove 24 are symmetrically arranged on both sides of the body receiving groove 22. The body receiving groove 22 has a circular cross-sectional shape to accommodate the circular body of the positive electrode plate 100 and the negative electrode plate 200; the positive electrode tab receiving groove 23 and the negative electrode tab receiving groove 24 have a fan-shaped cross-sectional shape to accommodate the tabs of the positive electrode plate 100 and the negative electrode plate 200. The body receiving groove 22 extends vertically to facilitate double-sided hot pressing. The bottom of the positive electrode tab receiving groove 23 and the negative electrode tab receiving groove 24 is provided with a support plate 25. The support plate 25 is used to support the tabs of the positive electrode 100 and the negative electrode 200 to prevent them from falling off.

[0024] Please see Figure 1 The electrode feeding unit includes a positive electrode feeding mechanism 30 and a negative electrode feeding mechanism 40 symmetrically arranged on both sides of the electrode feeding station.

[0025] The positive electrode feeding mechanism 30 includes a positive electrode cassette 31, a positive electrode correction component 32, and a positive electrode picking robot 33. The positive electrode cassette 31 is used to store the positive electrode 100, and the positive electrode picking robot 33 is used to move the positive electrode 100 from the positive electrode cassette 31 to the positive electrode correction component 32. The positive electrode correction component 32 is used to correct the position of the positive electrode 100. The negative electrode feeding mechanism 40 includes a negative electrode cassette 41, a negative electrode correction component 42, and a negative electrode picking robot 43. The negative electrode cassette 41 is used to store the negative electrode 200, and the negative electrode picking robot 43 is used to move the negative electrode 200 from the negative electrode cassette 41 to the negative electrode correction component 42. The negative electrode correction component 42 is used to correct the position of the negative electrode 200.

[0026] like Figure 3 As shown, the positive electrode correction assembly 32 and the negative electrode correction assembly 42 have the same structure, both including a support bracket 321, a correction fixing seat 322, a correction movable block 323, and a correction drive member 324. The correction fixing seat 322 is fixed to the support bracket 321, the correction movable block 323 is movably connected to the support bracket 321, and the correction drive member 324 is fixed to the support bracket 321 and is drively connected to the correction movable block 323. The correction fixing seat 322 is provided with a first calibration groove 325, and the correction movable block 323 is provided with a second calibration groove 326. The correction drive member 324 drives the correction movable block 323 to move toward the correction fixing seat 322, so that the first calibration groove 325 and the second calibration groove 326 are joined to form a calibration groove for correcting the position of the electrode 100.

[0027] like Figure 4As shown, the positive electrode picking robot 33 and the negative electrode picking robot 43 have the same structure, both including a second linear drive mechanism 331, a second lifting drive mechanism 332, a support frame 333, and a picking suction head 334. The picking suction head 334 is fixed on the support frame 333, and the second linear drive mechanism 331 and the second lifting drive mechanism 332 are used to drive the support frame 333 to move horizontally and lift vertically.

[0028] Please see Figure 1 , Figure 4 and Figure 5 A transfer robot 50 is positioned above the electrode loading station. The transfer robot 50 includes a first linear drive mechanism 51, a first lifting drive mechanism 52, and two suction components 53. Both suction components 53 are mounted on the first lifting drive mechanism 52, which in turn is mounted on the first linear drive mechanism 51. The first linear drive mechanism 51 and the first lifting drive mechanism 52 drive the two suction components 53 to move horizontally and lift synchronously.

[0029] Two suction components 53 are used to alternately absorb the positive electrode 100 output from the positive electrode feeding mechanism 30 and the negative electrode 200 output from the negative electrode feeding mechanism 40, and place the absorbed electrodes into the positioning groove 21 of the fixture 20. The suction component 53 includes a rotary drive module 531 and a discharge suction head 532 located below the rotary drive module 531. The rotary drive module 531 drives the discharge suction head 532 to rotate by a preset angle, so that the absorbed positive electrode 100 or negative electrode 200 are stacked in a staggered manner. Figure 5 As shown, the feeding suction head 532 includes a main body adsorption part 533 and an electrode tab adsorption part 534 disposed on one side of the main body adsorption part 533. When the electrode is transferred, it simultaneously adsorbs the electrode body and the electrode tab to avoid uneven force on the electrode and causing displacement.

[0030] Please see Figure 1 and Figure 6 The hot pressing unit includes an upper hot pressing mechanism 60 and a lower hot pressing mechanism 70, which are respectively disposed above and below the hot pressing station. The upper hot pressing mechanism 60 and the lower hot pressing mechanism 70 extend into the positioning groove 21 of the fixture 20 to perform double-sided hot pressing on the electrode assembly stacked in the positioning groove 21.

[0031] The upper hot pressing mechanism 60 includes a connecting frame 61, a lifting drive module 62, a lifting block 63, and a first hot pressing module 64. The lifting drive module 62 is fixed to the connecting frame 61, the lifting block 63 is connected to the lifting drive module 62, and the first hot pressing module 64 is fixed to the bottom of the lifting block 63. The first hot pressing module 64 includes a first heat insulation plate 641, a first heat conducting block 642, and a first hot pressing head 643. The first heat insulation plate 641 is fixed to the bottom of the lifting block 63, the first heat conducting block 642 is fixed to the bottom of the first heat insulation plate 641, and the first hot pressing head 643 is integrally formed on the bottom of the first heat conducting block 642. The first heat conducting block 642 is provided with a first heating element (not shown in the figure). After being powered on, heat is conducted through the first heat conducting block 642 to the first hot pressing head 643 to hot press the upper surface of the electrode assembly.

[0032] The lower hot pressing mechanism 70 includes a lifting drive module 71 and a second hot pressing module 72, which is drivenly connected to the lifting drive module 71. The second hot pressing module 72 includes a second heat insulation plate 721, a second heat-conducting block 722, and a second hot pressing head 723. The second heat insulation plate 721 is drivenly connected to the lifting drive module 71, the second heat-conducting block 722 is fixed to the top of the second heat insulation plate 721, and the second hot pressing head 723 is integrally formed on the top of the second heat-conducting block 722. A second heating element (not shown in the figure) is provided inside the second heat-conducting block 722. After being energized, heat is conducted through the second heat-conducting block 722 to the second hot pressing head 723, hot pressing the lower surface of the electrode assembly. Simultaneous hot pressing on both the upper and lower sides ensures more uniform heating of the electrode assembly and higher hot pressing quality.

[0033] Please see Figure 1 and Figure 7 The finished product unloading unit includes a finished product unloading robot 80 and a finished product lifting mechanism 90, which are respectively positioned above and below the unloading station. The finished product lifting mechanism 90 includes a lifting drive module 91 and a lifting protrusion 92 fixed on the lifting drive module 91. The lifting drive module 91 drives the lifting protrusion 92 to extend upward into the body receiving groove 22, pushing the finished product out of the positioning groove 21; the finished product unloading robot 80 takes out the lifted finished product and removes it.

[0034] The working principle of the electrode lamination device involved in this invention is as follows: During processing, the positive electrode picking robot 33 takes the positive electrode 100 from the positive electrode box 31 and transfers it to the positive electrode correction component 32 for position correction. After correction, the positive electrode 100 is transferred to the preset picking position. Similarly, the negative electrode picking robot 43 transfers the corrected negative electrode 200 to the preset picking position. The two suction components 53 of the transfer robot 50 alternately pick up the positive electrode 100 and the negative electrode 200. The rotation drive module 531 drives the unloading suction head 532 to rotate the picked-up electrode by a preset angle and place it in the positioning groove 21 of the fixture 20, forming a... Figure 8The diagram shows an electrode assembly with alternating positive and negative electrode plates 100 and misaligned tabs. A turntable 10 rotates a fixture 20 carrying the electrode assembly to a hot-pressing station. An upper hot-pressing mechanism 60 and a lower hot-pressing mechanism 70 extend from above and below into the positioning groove 21 to perform double-sided hot-pressing of the electrode assembly, forming a finished product. The turntable 10 then rotates the fixture 20 carrying the finished product to a discharge station. A finished product lifting mechanism 90 ejects the finished product, and a finished product discharge robot 80 removes it.

[0035] Compared to existing technologies, the electrode stacking equipment with misaligned tabs involved in this invention utilizes a turntable 10 to drive a fixture 20 to circulate among four workstations. A transfer robot 50 alternately picks up positive and negative electrode sheets 200 and stacks them in a misaligned manner. The hot-pressing unit simultaneously performs hot-pressing from top to bottom, achieving automated and continuous operation of electrode stacking, hot-pressing, and finished product discharge. Two suction components 53 alternately pick up positive and negative electrode sheets 200, resulting in high stacking efficiency. A rotary drive module 531 drives the unloading suction head 532 to rotate at a preset angle, ensuring the accuracy of the misaligned tab arrangement. Simultaneous hot-pressing from top to bottom ensures uniform heating of the electrode assembly, resulting in higher hot-pressing quality and significant practical value.

[0036] like Figure 9 As shown, this invention provides a staggered lamination process based on the aforementioned staggered electrode tab lamination equipment, comprising the following steps: S1. Feeding the positive electrode 100: The transfer robot 50 picks up the positive electrode 100 output by the positive electrode feeding mechanism 30, the rotary drive module 531 drives the feeding suction head 532 to rotate the picked-up positive electrode 100 by a preset angle, and then places the positive electrode 100 in the positioning groove 21 of the fixture 20. S2. Feeding of negative electrode sheet 200: The transfer robot 50 picks up the negative electrode sheet 200 output by the negative electrode sheet feeding mechanism 40, the rotary drive module 531 drives the feeding suction head 532 to rotate the picked-up negative electrode sheet 200 by a preset angle, and then places the negative electrode sheet 200 in the positioning groove 21 of the fixture 20. S3. Alternately cycle steps S1 and S2, as follows: Figure 8 As shown, an electrode group in which positive electrode 100 and negative electrode 200 are alternately stacked is formed in the positioning groove 21; wherein, the positive electrode tabs and negative electrode tabs of the electrode group are symmetrically distributed in the projection direction; and the positive electrode tabs that are adjacent vertically on the same side are staggered with each other, and the negative electrode tabs that are adjacent vertically on the same side are staggered with each other. S4. Double-sided hot pressing: The turntable 10 rotates the fixture 20 carrying the electrode assembly to the hot pressing station. The upper hot pressing mechanism 60 and the lower hot pressing mechanism 70 extend into the positioning groove 21 respectively to perform double-sided hot pressing on the electrode assembly to form a finished product. S5. Discharge: The turntable 10 rotates the fixture 20 carrying the finished product to the discharge station, and the finished product discharge unit takes the finished product out of the positioning slot.

[0037] Compared with the prior art, the staggered stacking process involved in this invention uses a transfer robot 50 to alternately pick up the positive electrode 100 and the negative electrode 200, and a rotation drive module 531 to drive the feeding suction head 532 to rotate each electrode by a preset angle and place it in the positioning groove 21 of the fixture 20, forming an electrode group in which the positive electrode 100 and the negative electrode 200 are stacked alternately and the electrode tabs are staggered, thus realizing the automated stacking of staggered electrode tabs.

[0038] The above description merely illustrates preferred technical solutions of the present invention, and while the description is relatively specific and detailed, it should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and the present invention also intends to include these modifications and variations.

Claims

1. A device for stacking electrode tabs with misaligned electrodes, characterized in that, include: A turntable is provided with multiple fixtures, each fixture having a positioning groove for stacking positive and negative electrode sheets; the turntable has an electrode sheet loading station, a transition station, a hot pressing station, and a discharge station, and the turntable is used to drive the fixtures to circulate between the electrode sheet loading station, the transition station, the hot pressing station, and the discharge station; The electrode feeding unit includes a positive electrode feeding mechanism and a negative electrode feeding mechanism symmetrically arranged on both sides of the electrode feeding station; A transfer robot is positioned above the electrode loading station; the transfer robot includes a first linear drive mechanism, a first lifting drive mechanism, and two suction components; the first linear drive mechanism and the first lifting drive mechanism are used to drive the two suction components to move horizontally and lift synchronously; the two suction components are used to alternately pick up positive and negative electrode sheets and place them in the positioning slot; each suction component includes a rotary drive module and a discharge suction head located below the rotary drive module; The rotary drive module drives the feeding head to rotate by a preset angle so that the positive or negative electrode sheets picked up are stacked in a staggered manner. The hot pressing unit includes an upper hot pressing mechanism and a lower hot pressing mechanism that are disposed opposite to each other above and below the hot pressing station; the upper hot pressing mechanism and the lower hot pressing mechanism extend into the positioning groove of the fixture respectively to perform double-sided hot pressing; The finished product unloading unit includes a finished product lifting mechanism and a finished product unloading robot that are respectively arranged above and below the unloading station; the finished product lifting mechanism is used to push the finished product out of the positioning groove, and the finished product unloading robot is used to take out the lifted finished product.

2. The electrode lamination device with misaligned tabs according to claim 1, characterized in that, The positioning groove includes a connected body receiving groove, a positive electrode receiving groove, and a negative electrode receiving groove; the positive electrode receiving groove and the negative electrode receiving groove are symmetrically arranged on both sides of the body receiving groove; the cross-sectional shape of the body receiving groove is circular, and the cross-sectional shape of the positive electrode receiving groove and the negative electrode receiving groove is fan-shaped.

3. The electrode lamination device according to claim 2, characterized in that, The main body receiving groove extends vertically, and the bottom of the positive electrode receiving groove and the negative electrode receiving groove are provided with support plates.

4. The electrode lamination device according to claim 1, characterized in that, The positive electrode feeding mechanism includes a positive electrode box, a positive electrode correction component, and a positive electrode picking robot; the positive electrode box is used to store positive electrode sheets, the positive electrode robot is used to move the positive electrode sheets from the positive electrode box to the positive electrode correction component, and the positive electrode correction component is used to correct the position of the positive electrode sheets; The negative electrode feeding mechanism includes a negative electrode box, a negative electrode correction component, and a negative electrode picking robot; the negative electrode box is used to store negative electrode sheets, the negative electrode robot is used to move the negative electrode sheets from the negative electrode box to the negative electrode correction component, and the negative electrode correction component is used to correct the position of the negative electrode sheets.

5. The electrode lamination device according to claim 4, characterized in that, The positive electrode correction assembly and the negative electrode correction assembly have the same structure. Both the positive electrode correction assembly and the negative electrode correction assembly include a support bracket, a correction fixing seat, a correction movable block, and a correction driving component. The correction fixing seat is fixed to the support bracket, the correction movable block is movably connected to the support bracket, and the correction driving component is fixed to the support bracket and is drively connected to the correction movable block. The correction fixing seat is provided with a first calibration groove, and the correction movable block is provided with a second calibration groove. The correction driving component drives the correction movable block to move toward the correction fixing seat, so that the first calibration groove and the second calibration groove are joined to form a calibration groove for correction position.

6. The electrode lamination device according to claim 4, characterized in that, The positive electrode picking robot and the negative electrode picking robot have the same structure. Both the positive electrode picking robot and the negative electrode picking robot include a second linear drive mechanism, a second lifting drive mechanism, a support frame, and a picking suction head. The picking suction head is fixed on the support frame. The second linear drive mechanism and the second lifting drive mechanism are used to drive the support frame to move horizontally and lift vertically.

7. The electrode lamination device according to claim 1, characterized in that, The feeding suction head includes a main adsorption part and an electrode adsorption part disposed on one side of the main adsorption part.

8. The electrode lamination device according to claim 1, characterized in that, The upper hot pressing mechanism includes a connecting frame, a lifting drive module, a lifting block, and a first hot pressing module; the lifting drive module is fixed on the connecting frame, the lifting block is connected to the lifting drive module in a transmission manner, and the first hot pressing module is fixed to the bottom of the lifting block; The lower hot pressing mechanism includes a lifting drive module and a second hot pressing module, and the second hot pressing module is connected to the lifting drive module in a transmission manner.

9. The electrode lamination device according to claim 8, characterized in that, The first hot pressing module includes a first heat insulation plate, a first heat conducting block, and a first hot pressing head; the first heat insulation plate is fixed to the bottom of the lifting block, the first heat conducting block is fixed to the bottom of the first heat insulation plate, and the first hot pressing head is integrally formed on the bottom of the first heat conducting block; a first heating element is provided inside the first heat conducting block. The second hot pressing module includes a second heat insulation plate, a second heat-conducting block, and a second hot pressing head; the second heat insulation plate is connected to the lifting drive module, the second heat-conducting block is fixed to the top of the second heat insulation plate, and the second hot pressing head is integrally formed on the top of the second heat-conducting block; a second heating element is provided inside the second heat-conducting block.

10. A staggered lamination process, based on the electrode staggered tab lamination equipment according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Positive electrode sheet feeding: The transfer robot picks up the positive electrode sheet output by the positive electrode sheet feeding mechanism, the rotary drive module drives the feeding suction head to rotate the picked-up positive electrode sheet by a preset angle, and then places the positive electrode sheet into the positioning groove of the fixture; S2. Negative electrode sheet feeding: The transfer robot picks up the negative electrode sheet output by the negative electrode sheet feeding mechanism, the rotary drive module drives the feeding suction head to rotate the picked-up negative electrode sheet by a preset angle, and then places the negative electrode sheet into the positioning groove of the fixture; S3. Alternately cycle steps S1 and S2 to form an electrode group in the positioning groove in which positive and negative electrode sheets are stacked alternately; wherein, the positive and negative electrode tabs of the electrode group are symmetrically distributed in the projection direction; and the positive electrode tabs that are adjacent vertically on the same side are staggered with each other, and the negative electrode tabs that are adjacent vertically on the same side are staggered with each other. S4. Double-sided hot pressing: The turntable rotates the fixture carrying the electrode assembly to the hot pressing station. The upper hot pressing mechanism and the lower hot pressing mechanism extend into the positioning groove respectively to perform double-sided hot pressing on the electrode assembly to form a finished product. S5. Discharge: The turntable rotates the fixture carrying the finished product to the discharge station, and the finished product discharge unit removes the finished product from the positioning slot.

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