Thermal composite lamination equipment

Abstract

The utility model belongs to the technical field of battery production, and discloses thermal composite lamination equipment, which comprises a positive and negative pole piece composite assembly, a pole piece carrying correction assembly, a lamination platform assembly, a hot pressing assembly and a rubberizing detection assembly which are sequentially arranged along the flow direction of a production line, the positive and negative pole piece composite assembly comprises a positive pole piece unwinding and cutting mechanism, a negative pole piece unwinding and cutting mechanism, a dust removal mechanism, a first diaphragm unwinding mechanism, a second diaphragm unwinding mechanism, a thermal composite compression roller mechanism and a diaphragm cutting mechanism, and the dust removal mechanism is used for removing dust of the cut positive pole piece and negative pole piece; the thermal compounding compression roller mechanism is used for sequentially superposing the dedusted positive plate and the dedusted negative plate from bottom to top according to the sequence of the first diaphragm, the negative plate, the second diaphragm and the positive plate and carrying out hot-pressing compounding, and the diaphragm cutting mechanism is used for sequentially cutting the first diaphragm and the second diaphragm through laser cutting to form a compound unit plate; and the pole piece carrying deviation rectifying assembly executes deviation rectifying action in the carrying process. According to the arrangement, the production efficiency and the processing quality of the laminated battery cell can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery production technical field especially relates to hot compound lamination equipment. BACKGROUND

[0002] In the manufacturing process of lithium ion battery, the lamination process of the battery cell directly affects the performance, stability and safety of the battery. The traditional Z-shaped lamination method has the following problems, first, the production efficiency is low and the diaphragm is easy to form wrinkles, because the Z-shaped lamination needs the diaphragm to swing back and forth, only one pole piece can be placed each time, which limits the production speed, and the periodic change of the tension of the swinging diaphragm will form wrinkles, which will affect the flatness of the internal structure of the battery cell, and further affect the performance and safety of the battery; second, the pole piece after cutting is directly laminated, and the dust and burrs generated at the edge of the pole piece may enter the internal structure of the battery cell during the lamination process, causing micro-short circuit, local heating and other problems, and even causing safety hazards; third, the cutting heat generated during the cutting process of the diaphragm cutting knife causes the cutting edge to be not smooth, and even damages the diaphragm, and the cutting precision is insufficient, which is easy to produce unqualified parts. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing hot compound lamination equipment, which can solve the problems of low production efficiency and easy formation of wrinkles in the existing Z-shaped lamination, direct lamination of the pole piece after cutting, causing impurities to enter the internal structure of the battery cell, and the diaphragm cutting knife causing the cutting edge to be not smooth, damaging the diaphragm and the cutting precision being insufficient.

[0004] In order to achieve this purpose, the utility model adopts the following technical scheme:

[0005] The utility model provides hot compound lamination equipment, which comprises positive and negative pole piece composite assembly, pole piece carrying and deviation rectifying assembly, lamination platform assembly, hot pressing assembly and rubberizing detection assembly arranged in turn along the flow direction of the production line, the positive and negative pole piece composite assembly comprises positive pole piece unwinding and cutting mechanism, negative pole piece unwinding and cutting mechanism, dust removal mechanism, first diaphragm unwinding mechanism, second diaphragm unwinding mechanism, hot compound pressing roller mechanism and diaphragm cutting mechanism, the dust removal mechanism is used for dust removal of the positive pole piece and the negative pole piece after cutting, the hot compound pressing roller mechanism is used for placing and hot pressing the positive pole piece and the negative pole piece after dust removal from bottom to top in the order of first diaphragm, negative pole piece, second diaphragm and positive pole piece, the diaphragm cutting mechanism cuts the first diaphragm and the second diaphragm in turn by laser cutting to form a composite unit piece, the pole piece carrying and deviation rectifying assembly is used for carrying a plurality of composite unit pieces to the lamination platform of the lamination platform assembly in turn, and can execute deviation rectifying action during the carrying process, the lamination platform assembly is used for laminating a plurality of composite units to form a battery cell, the hot pressing assembly is used for hot pressing the battery cell, and the rubberizing detection assembly is used for packaging the battery cell after hot pressing.

[0006] In one embodiment, the dust removal mechanism includes a first dust removal component and a second dust removal component. The first dust removal component is used to remove dust from both sides of the cut positive electrode sheet, and the second dust removal component is used to remove dust from both sides of the cut negative electrode sheet.

[0007] In one embodiment, the thermal lamination equipment further includes a testing component, which includes a short-circuit testing mechanism and a size detection mechanism. The short-circuit testing mechanism is disposed between the thermal lamination roller mechanism and the diaphragm cutting mechanism, and the size detection mechanism is disposed between the diaphragm cutting mechanism and the electrode transport and correction assembly. The short-circuit testing mechanism is used to perform electrical performance testing on the composite unit wafers, and the size detection mechanism is used to perform size and / or appearance inspection on the composite unit wafers.

[0008] In one embodiment, the thermal composite stacking device further includes a composite unit sheet transfer assembly, which is disposed between the size detection mechanism and the electrode transfer and correction assembly. The composite unit sheet transfer assembly is used to transfer the qualified composite unit sheet to the gripping position of the electrode transfer and correction assembly.

[0009] In one embodiment, the composite unit cell transmission component includes a transmission mechanism, a buffer platform, and a visual correction mechanism. The visual correction mechanism is communicatively connected to the electrode transport and correction component. The transmission mechanism is used to transmit qualified composite unit cells to the buffer platform. The visual correction mechanism takes pictures of the unit cells on the buffer platform to confirm the grasping position and transmits the grasping position information to the electrode transport and correction component.

[0010] In one embodiment, the thermal composite stacking device further includes a defect kicking component, which is disposed between the size detection mechanism and the composite unit sheet transfer component, and is used to kick out composite unit sheets that fail the detection.

[0011] In one embodiment, the electrode handling and correction assembly includes a four-axis robot, a gripping suction cup, and a vision mechanism. The gripping suction cup is connected to the four-axis robot and is used to grip the composite unit sheet. The gripping suction cup has a fitting position. The vision mechanism is communicatively connected to the four-axis robot and is used to compare the positional deviation between the composite unit sheet and the fitting position, and transmit the positional deviation data to the four-axis robot. The four-axis robot adjusts the position of the composite unit sheet according to the positional deviation data and then transmits it to the stacking platform assembly.

[0012] In one embodiment, the positive and negative electrode composite assembly further includes two sets of primary correction mechanisms and two sets of secondary correction mechanisms. One set of the two primary correction mechanisms is disposed before the positive electrode unwinding and cutting mechanism for correcting the position of the entire roll of positive electrode sheets. The other set of the two primary correction mechanisms is disposed before the negative electrode unwinding and cutting mechanism for correcting the position of the entire roll of negative electrode sheets. One set of the two secondary correction mechanisms is disposed between the dust removal mechanism and the thermal composite pressure roller mechanism for correcting the position of the positive electrode sheets after dust removal. The other set of the two secondary correction mechanisms is disposed between the dust removal mechanism and the thermal composite pressure roller mechanism for correcting the position of the negative electrode sheets after dust removal; and / or,

[0013] The production line is symmetrically arranged in two sets, and each set of the production line is respectively equipped with the positive and negative electrode composite assembly, the electrode handling and correction assembly, the stacking platform assembly, the hot pressing assembly, and the adhesive bonding detection assembly.

[0014] In one embodiment, the stacking platform assembly includes a stacking platform, a composite sheet pressing knife, a translation mechanism, and a lifting mechanism. The composite sheet pressing knife is movably disposed on the stacking platform and is used to press down on the composite unit sheets transported by the electrode transport and correction assembly one by one, so that multiple composite unit sheets are stacked sequentially from bottom to top.

[0015] In one embodiment, the stacking platform assembly has four stacking stations. The stacking platform assembly includes four sets of stacking platforms, four sets of composite sheet pressing knives, four sets of translation mechanisms, and four sets of lifting mechanisms. Each of the four stacking stations is provided with one set of stacking platforms, one set of composite sheet pressing knives, one set of translation mechanisms, and one set of lifting mechanisms.

[0016] The beneficial effects of this utility model are:

[0017] The thermal lamination equipment provided by this utility model includes a positive and negative electrode lamination assembly, an electrode handling and correction assembly, a lamination platform assembly, a hot pressing assembly, and an adhesive bonding and detection assembly arranged sequentially along the flow direction of the production line. The positive and negative electrode lamination assembly includes a positive electrode unwinding and cutting mechanism, a negative electrode unwinding and cutting mechanism, a dust removal mechanism, a first diaphragm unwinding mechanism, a second diaphragm unwinding mechanism, a thermal lamination pressure roller mechanism, and a diaphragm cutting mechanism. The positive electrode unwinding and cutting mechanism is used to unwind and cut positive electrode sheets of uniform size, and the negative electrode unwinding and cutting mechanism is used to unwind and cut negative electrode sheets of uniform size. The dust removal mechanism is used to remove dust from the cut positive and negative electrode sheets. The first diaphragm unwinding mechanism is used to unwind the first layer of diaphragm, and the second diaphragm unwinding mechanism is used to unwind the second layer of diaphragm, providing a stable diaphragm supply. The hot-pressing composite roller mechanism is used to stack the dust-removed positive and negative electrode sheets sequentially from bottom to top in the order of first separator, negative electrode sheet, second separator, and positive electrode sheet, and then perform hot-pressing composite bonding. Heat and pressure are applied by the hot-pressing roller to effectively bond the materials between the layers to form a composite unit sheet. The separator cutting mechanism uses laser cutting to sequentially cut the first and second separators to form multiple composite unit sheets of equal width. The electrode sheet handling and correction assembly is used to sequentially transport multiple composite unit sheets to the stacking platform of the stacking platform assembly, and can perform correction actions during the transport process. The stacking platform assembly is used to stack multiple composite units to form a battery cell. The hot-pressing assembly is used to hot-press the battery cell, and the adhesive bonding and detection assembly is used to encapsulate the hot-pressed battery cell. This embodiment of the hot-pressing composite stacking equipment uses a four-layer CELL (separator-negative electrode-separator-positive electrode) for electrode stacking, improving stacking efficiency. During the stacking process, the first and second separators are always transported in one direction. A thermal bonding method adheres the separators to the positive and negative electrode sheets, preventing the separators from swinging back and forth, stabilizing the separator tension, and avoiding wrinkles caused by periodic tension changes. This prevents the impact on the flatness of the internal structure of the cell, improving battery performance and safety. A dust removal mechanism removes dust from the cut positive and negative electrode sheets, reducing dust, burrs, and other impurities carried by the sheets. This prevents impurities from entering the cell during subsequent stacking, thus avoiding safety hazards such as micro-short circuits and localized overheating. The electrode handling and correction assembly performs correction actions during handling, increasing stacking speed. The separator cutting mechanism uses laser cutting technology to cut the first and second separators. Laser cutting technology features high precision and low heat impact, ensuring smooth cuts without damaging the first and second separators, improving the processing quality of the composite unit sheets, and achieving efficient and high-quality production of lithium-ion battery cells. Attached Figure Description

[0018] Figure 1 This is a front structural view of the thermal composite lamination device provided in this embodiment of the utility model;

[0019] Figure 2This is a top view of the thermal composite lamination device provided in this embodiment of the utility model;

[0020] Figure 3 This is a partial structural schematic diagram of the positive and negative electrode composite assembly provided in this embodiment of the utility model;

[0021] Figure 4 This is a partial structural schematic diagram of the thermal composite lamination device provided in this embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the stacked platform assembly provided in this embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram of the process flow of the thermal composite lamination equipment provided in this embodiment of the utility model.

[0024] In the picture:

[0025] 1. Positive and negative electrode composite assembly; 11. Positive electrode unwinding and cutting mechanism; 12. Negative electrode unwinding and cutting mechanism; 13. Dust removal mechanism; 131. First dust removal component; 132. Second dust removal component; 14. First diaphragm unwinding mechanism; 15. Second diaphragm unwinding mechanism; 16. Hot composite pressure roller mechanism; 17. Diaphragm cutting mechanism; 181. Primary correction mechanism; 182. Secondary correction mechanism; 2. Electrode handling and correction assembly; 21. Four-axis robot; 3. Stacking platform assembly; 31. Stacking platform; 32. Composite sheet pressing knife; 33. Translation mechanism; 34. Lifting mechanism; 4. Hot pressing assembly; 5. Adhesive application detection assembly; 61. Short circuit testing mechanism; 62. Dimension detection mechanism; 71. Transmission mechanism; 72. Buffer platform; 73. Visual correction mechanism;

[0026] 100. Stacking station one; 200. Stacking station two; 300. Stacking station three; 400. Stacking station four. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, 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. They are used only for the convenience of describing this utility model 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 this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] like Figures 1 to 5As shown, this embodiment provides a thermal lamination and stacking equipment for processing laminated battery cells. The thermal lamination and stacking equipment includes a positive and negative electrode lamination assembly 1, an electrode handling and correction assembly 2, a stacking platform assembly 3, a hot pressing assembly 4, and an adhesive bonding and detection assembly 5, arranged sequentially along the flow direction of the production line. The positive and negative electrode lamination assembly 1 includes a positive electrode unwinding and cutting mechanism 11, a negative electrode unwinding and cutting mechanism 12, a dust removal mechanism 13, a first diaphragm unwinding mechanism 14, a second diaphragm unwinding mechanism 15, a thermal lamination pressure roller mechanism 16, and a diaphragm cutting mechanism 17. The positive electrode unwinding and cutting mechanism 11 is used to unwind and cut positive electrode sheets of uniform size, and the negative electrode unwinding and cutting mechanism 12 is used to unwind and cut negative electrode sheets of uniform size. The dust removal mechanism 13 is used to remove dust from the cut positive and negative electrode sheets. The first diaphragm unwinding mechanism 14 is used to unwind the first layer of diaphragm, and the second diaphragm unwinding mechanism 15 is used to unwind the second layer of diaphragm, providing a stable diaphragm supply. The hot-pressing roller mechanism 16 is used to stack the dust-removed positive and negative electrode sheets from bottom to top in the order of first diaphragm, negative electrode sheet, second diaphragm, and positive electrode sheet, and then perform hot-pressing composite bonding. Heat and pressure are applied by the hot-pressing roller to effectively bond the materials between the layers to form a composite unit sheet. The diaphragm cutting mechanism 17 uses laser cutting to sequentially cut the first and second diaphragms to form multiple composite unit sheets of equal width. The electrode sheet handling and correction assembly 2 is used to sequentially transport multiple composite unit sheets to the stacking platform 31 of the stacking platform assembly 3, and can perform correction actions during the transport process. The stacking platform assembly 3 is used to stack multiple composite units to form a battery cell. The hot-pressing assembly 4 is used to hot-press the battery cell, and the adhesive bonding detection assembly 5 is used to encapsulate the hot-pressed battery cell.

[0032] The thermal lamination equipment of this embodiment uses a four-layer CELL (separator-negative electrode-separator-positive electrode) for electrode stacking, improving stacking efficiency. During the stacking process, the first and second separators are always unidirectionally transported. The thermal lamination method bonds the separator to the positive and negative electrode sheets, avoiding back-and-forth oscillation of the separator, stabilizing the separator tension, and preventing wrinkles caused by periodic tension changes. This avoids affecting the flatness of the internal structure of the cell, improving battery performance and safety. The dust removal mechanism 13 removes dust from the cut positive and negative electrode sheets, reducing dust, burrs, and other impurities carried by the cut positive and negative electrode sheets, preventing impurities from entering the cell during subsequent stacking processes, thereby avoiding safety hazards such as micro-short circuits and localized overheating. The electrode handling and correction assembly 2 can perform correction actions during the handling process, thereby improving the stacking speed; the diaphragm cutting mechanism 17 cuts the first and second diaphragms using laser cutting technology. Laser cutting technology has the characteristics of high precision and low heat impact, ensuring smooth cuts without damaging the first and second diaphragms, improving the processing quality of composite unit sheets, and realizing efficient and high-quality production of lithium-ion battery cells.

[0033] The positive and negative electrode composite assembly 1 is provided with grippers, which respectively hold the cut positive and negative electrode sheets and send the negative electrode sheet between the first and second separators, with the negative electrode sheet placed on top of the first separator.

[0034] The adhesive tape inspection component 5 encapsulates the hot-pressed battery cells by applying protective tape to ensure the integrity of the cells. It also performs electrical performance and appearance inspections on the final product to ensure that the battery cell quality meets the requirements.

[0035] The dust removal mechanism 13 includes a first dust removal component 131 and a second dust removal component 132. The first dust removal component 131 is used to remove dust and burrs from the edges of the cut positive electrode sheet on both sides. The second dust removal component 132 is used to remove dust and burrs from the edges of the cut negative electrode sheet on both sides. Specifically, the dust removal mechanism 13 is located at the cutting point, and the cut positive and negative electrode sheets are respectively conveyed to the downstream dust removal mechanism 13 by the main drive rollers.

[0036] The first dust removal component 131 includes a first blowing component and a first suction component. The first blowing component blows dust and burrs from both sides and edges of the positive electrode plate, and the first suction component collects the blown-down impurities. Similarly, the second dust removal component 132 includes a second blowing component and a second suction component. The second blowing component blows dust and burrs from both sides and edges of the negative electrode plate, and the second suction component collects the blown-down impurities.

[0037] The thermal lamination equipment also includes a testing component, which comprises a short-circuit testing mechanism 61 (Hi-pot test) and a dimensional inspection mechanism 62. The short-circuit testing mechanism 61 is positioned between the thermal lamination pressure roller mechanism 16 and the diaphragm cutting mechanism 17, while the dimensional inspection mechanism 62 is positioned between the diaphragm cutting mechanism 17 and the electrode handling and correction assembly 2. The short-circuit testing mechanism 61 is used to perform electrical performance testing on the composite unit wafers, and the dimensional inspection mechanism 62 is used to perform dimensional and / or appearance inspection on the composite unit wafers, ensuring the quality of the composite unit wafers and improving the consistency and stability of the battery cells.

[0038] The thermal lamination equipment also includes a composite unit sheet transfer assembly, which is located between the size detection mechanism 62 and the electrode transfer and correction assembly 2. The composite unit sheet transfer assembly is used to transfer the qualified composite unit sheets to the gripping position of the electrode transfer and correction assembly 2.

[0039] Specifically, the composite unit cell transmission assembly includes a transmission mechanism 71, a buffer platform 72, and a visual correction mechanism 73. The visual correction mechanism 73 is communicatively connected to the electrode transport and correction assembly 2. The transmission mechanism 71 is used to transmit the qualified composite unit cells to the buffer platform 72. The visual correction mechanism 73 takes pictures of the unit cells on the buffer platform 72 to confirm the gripping position and transmits the gripping position information to the electrode transport and correction assembly 2, so that the electrode transport and correction assembly 2 can confirm the precise position of the composite unit cells. The transmission mechanism 71 can be a conveyor belt.

[0040] The hot lamination equipment also includes a scrap removal component, which is located between the size inspection mechanism 62 and the lamination unit transfer component. The scrap removal component is used to remove the unqualified lamination units to the NG box to ensure that the lamination units in subsequent processes are qualified.

[0041] The electrode handling and correction assembly 2 includes a four-axis robot 21, a gripping suction cup, and a vision mechanism. The gripping suction cup is connected to the four-axis robot 21 and is used to grip the composite unit electrode. The gripping suction cup has a fitting position, which is set as a four-corner fitting rectangle according to the shape of the electrode. The vision mechanism is connected to the four-axis robot 21 for communication. The vision mechanism takes pictures, compares the positional deviation between the composite unit electrode and the fitting position, and transmits the positional deviation data to the four-axis robot 21. The four-axis robot 21 adjusts the position of the composite unit electrode according to the positional deviation data and then transmits it to the stacking platform assembly 3. Position correction is performed during the handling process, reducing gripping, transferring, and unloading actions, avoiding the accumulation of errors caused by multiple gripping, and improving stacking efficiency and stacking accuracy.

[0042] The positive and negative electrode composite assembly 1 also includes two sets of primary correction mechanisms 181 and two sets of secondary correction mechanisms 182. One set of the two primary correction mechanisms 181 is located before the positive electrode unwinding and cutting mechanism 11 and is used to correct the position of the entire roll of positive electrode sheets. The other set of the two primary correction mechanisms 181 is located before the negative electrode unwinding and cutting mechanism 12 and is used to correct the position of the entire roll of negative electrode sheets. One set of the two secondary correction mechanisms 182 is located between the dust removal mechanism 13 and the hot composite pressure roller mechanism 16 and is used to correct the position of the positive electrode sheets after dust removal, because the blowing and suction airflow of dust removal will affect the positional accuracy of the positive and negative electrode sheets. The other set of the two secondary correction mechanisms 182 is located between the dust removal mechanism 13 and the hot composite pressure roller mechanism 16 and is used to correct the position of the negative electrode sheets after dust removal, thereby improving the positional accuracy of the electrode sheets during the conveying process. The secondary correction mechanism 182 includes a sensor and a movable correction stage. The cut positive and negative electrode sheets enter the correction stage respectively. The sensor detects the position of the positive and negative electrode sheets and corrects the position of the positive and negative electrode sheets by moving the correction stage, thereby improving the positional accuracy of the positive and negative electrode sheets, ensuring the positional accuracy of each electrode sheet, reducing accumulated errors, and improving the stacking accuracy.

[0043] In one embodiment, the positive and negative electrode composite assembly 1 is further provided with a positive electrode tensioning mechanism and a negative electrode tensioning mechanism, respectively, to control the tension of the positive and negative electrode sheets before cutting, thereby further ensuring the stable transport of the electrode sheets and avoiding deviation caused by tension fluctuations.

[0044] The production line is symmetrically set up in two groups. Each group is equipped with a positive and negative electrode composite assembly 1, an electrode handling and correction assembly 2, a stacking platform assembly 3, a hot pressing assembly 4, and an adhesive bonding detection assembly 5, thereby improving production efficiency. Figure 6 The composite A machine and composite B machine are two production lines. Composite A machine and composite B machine process simultaneously, and qualified battery cells are transported to the next workstation by the unloading logistics line.

[0045] The stacking platform assembly 3 includes a stacking platform 31, a composite sheet pressing knife 32, a translation mechanism 33, and a lifting mechanism 34. The composite sheet pressing knife 32 is movably mounted on the stacking platform 31. The composite sheet pressing knife 32 is used to press down on the composite unit sheets transported by the electrode handling and correction assembly 2 one by one, so that multiple composite unit sheets are stacked sequentially from bottom to top, ensuring no interlayer displacement between adjacent composite unit sheets. The translation mechanism 33 is used to drive the composite sheet pressing knife 32 to move horizontally, pressing down on or avoiding the stacked composite unit sheets. The lifting mechanism 34 is used to drive the composite sheet pressing knife 32 to move up and down, adapting to composite unit sheets of different heights.

[0046] The thermal lamination equipment is also equipped with a stacked cell unloading robot assembly, which is used to transport the stacked cells to the hot pressing station, where they are hot-pressed by the hot pressing assembly 4. The hot pressing treatment of the stacked cells by the hot pressing assembly 4 enhances the interlayer adhesion and improves the structural stability of the cells.

[0047] The stacking platform assembly 3 has four stacking stations: stacking station 1 (100), stacking station 2 (200), stacking station 3 (300), and stacking station 4 (400). The stacking platform assembly 3 includes four stacking platforms 31, four composite sheet pressing knives 32, four translation mechanisms 33, and four lifting mechanisms 34. Each of the four stacking stations is equipped with one stacking platform 31, one composite sheet pressing knife 32, one translation mechanism 33, and one lifting mechanism 34, enabling simultaneous stacking of four sets of battery cells. The stacked battery cells are then transported by the battery cell unloading robot assembly to the hot pressing station, where they are hot-pressed by the hot pressing assembly 4. Since the production cycle of the hot pressing station is shorter than that of the stacking station, having four stacking stations reduces the waiting time at the hot pressing station and improves production efficiency.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A thermal composite lamination equipment, characterized in that, The assembly includes a positive and negative electrode composite assembly (1), an electrode handling and correction assembly (2), a stacking platform assembly (3), a hot pressing assembly (4), and an adhesive bonding detection assembly (5), arranged sequentially along the flow direction of the production line. The positive and negative electrode composite assembly (1) includes a positive electrode unwinding and cutting mechanism (11), a negative electrode unwinding and cutting mechanism (12), a dust removal mechanism (13), a first diaphragm unwinding mechanism (14), a second diaphragm unwinding mechanism (15), a hot bonding pressure roller mechanism (16), and a diaphragm cutting mechanism (17). The dust removal mechanism (13) is used to remove dust from the cut positive and negative electrode sheets. The hot bonding pressure roller mechanism (16) is used to remove dust from the positive electrode sheets after dust removal. The electrode sheet and the negative electrode sheet are stacked sequentially from bottom to top in the order of first separator, negative electrode sheet, second separator, and positive electrode sheet and then hot-pressed together. The separator cutting mechanism (17) cuts the first separator and the second separator sequentially by laser cutting to form a composite unit sheet. The electrode sheet handling and correction assembly (2) is used to transport multiple composite unit sheets sequentially to the stacking platform (31) of the stacking platform assembly (3) and can perform correction actions during the transport process. The stacking platform assembly (3) is used to stack multiple composite units to form a battery cell. The hot-pressing assembly (4) is used to hot-press the battery cell. The adhesive bonding detection assembly (5) is used to encapsulate the hot-pressed battery cell.

2. The thermal composite stacking equipment according to claim 1, characterized in that, The dust removal mechanism (13) includes a first dust removal component (131) and a second dust removal component (132). The first dust removal component (131) is used to remove dust from both sides of the cut positive electrode sheet, and the second dust removal component (132) is used to remove dust from both sides of the cut negative electrode sheet.

3. The thermal composite stacking equipment according to claim 1, characterized in that, The thermal composite lamination equipment also includes a testing component, which includes a short-circuit testing mechanism (61) and a size detection mechanism (62). The short-circuit testing mechanism (61) is disposed between the thermal composite pressure roller mechanism (16) and the diaphragm cutting mechanism (17). The size detection mechanism (62) is disposed between the diaphragm cutting mechanism (17) and the electrode transport and correction assembly (2). The short-circuit testing mechanism (61) is used to perform electrical performance testing on the composite unit wafers, and the size detection mechanism (62) is used to perform size and / or appearance inspection on the composite unit wafers.

4. The thermal composite stacking equipment according to claim 3, characterized in that, The thermal composite lamination equipment also includes a composite unit sheet transfer component, which is disposed between the size detection mechanism (62) and the electrode transfer and correction component (2). The composite unit sheet transfer component is used to transfer the qualified composite unit sheet to the gripping position of the electrode transfer and correction component (2).

5. The thermal composite stacking equipment according to claim 4, characterized in that, The composite unit chip transmission component includes a transmission mechanism (71), a buffer platform (72), and a visual correction mechanism (73). The visual correction mechanism (73) is communicatively connected to the electrode transport correction component (2). The transmission mechanism (71) is used to transmit the qualified composite unit chip to the buffer platform (72). The visual correction mechanism (73) takes pictures of the unit chip on the buffer platform (72) to confirm the grasping position and transmits the grasping position information to the electrode transport correction component (2).

6. The thermal composite stacking equipment according to claim 4, characterized in that, The thermal composite lamination equipment also includes a scrap removal component, which is disposed between the size detection mechanism (62) and the composite unit sheet transfer component. The scrap removal component is used to remove composite unit sheets that fail the inspection.

7. The thermal composite lamination equipment according to any one of claims 1-6, characterized in that, The electrode handling and correction assembly (2) includes a four-axis robot (21), a gripping suction cup, and a vision mechanism. The gripping suction cup is connected to the four-axis robot (21) and is used to grip the composite unit sheet. The gripping suction cup has a fitting position. The vision mechanism is communicatively connected to the four-axis robot (21) and is used to compare the positional deviation between the composite unit sheet and the fitting position, and transmit the positional deviation data to the four-axis robot (21). The four-axis robot (21) adjusts the position of the composite unit sheet according to the positional deviation data and then transmits it to the stacking platform assembly (3).

8. The thermal composite lamination equipment according to any one of claims 1-6, characterized in that, The positive and negative electrode composite assembly (1) further includes two sets of primary correction mechanisms (181) and two sets of secondary correction mechanisms (182). One set of the two sets of primary correction mechanisms (181) is located before the positive electrode unwinding and cutting mechanism (11) and is used to correct the position of the entire roll of positive electrode sheets. The other set of the two sets of primary correction mechanisms (181) is located before the negative electrode unwinding and cutting mechanism (12) and is used to correct the position of the entire roll of negative electrode sheets. One set of the two sets of secondary correction mechanisms (182) is located between the dust removal mechanism (13) and the hot composite pressure roller mechanism (16) and is used to correct the position of the positive electrode sheets after dust removal. The other set of the two sets of secondary correction mechanisms (182) is located between the dust removal mechanism (13) and the hot composite pressure roller mechanism (16) and is used to correct the position of the negative electrode sheets after dust removal; and / or, The production line is symmetrically arranged in two sets, and each set of the production line is respectively equipped with the positive and negative electrode composite assembly (1), the electrode handling and correction assembly (2), the stacking platform assembly (3), the hot pressing assembly (4), and the adhesive bonding detection assembly (5).

9. The thermal composite lamination device according to any one of claims 1-6, characterized in that, The stacking platform assembly (3) includes a stacking platform (31), a composite sheet pressing knife (32), a translation mechanism (33), and a lifting mechanism (34). The composite sheet pressing knife (32) is movably disposed on the stacking platform (31). The composite sheet pressing knife (32) is used to press down on the composite unit sheets transported by the electrode transport and correction assembly (2) one by one, so that multiple composite unit sheets are stacked sequentially from bottom to top.

10. The thermal composite stacking device according to claim 9, characterized in that, The stacking platform assembly (3) has four stacking stations. The stacking platform assembly (3) includes four stacking platforms (31), four composite sheet pressing knives (32), four translation mechanisms (33), and four lifting mechanisms (34). Each of the four stacking stations is provided with one stacking platform (31), one composite sheet pressing knives (32), one translation mechanism (33), and one lifting mechanism (34).

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