A lamination device

Abstract

This invention provides a stacking device, including a stacking support section, a stacking operation section, a film cutting section, a diaphragm pressing section, and a feeding gripper. The film cutting section is disposed between the stacking support section and the diaphragm pressing section. The stacking operation section is configured to cyclically stack diaphragms and electrode sheets on the stacking support section to form a battery cell unit. The feeding gripper is configured to remove the battery cell unit from the stacking support section. The film cutting section is configured to cut the diaphragm when the feeding gripper removes the battery cell unit, with the cut end of the diaphragm to be laid by the stacking operation section hanging down into the gap between the stacking support section and the diaphragm pressing section. The diaphragm pressing section is used to press the cut end of the diaphragm to be laid against the side wall of the stacking support section before the next set of battery cell units is stacked by the stacking operation section. By providing the diaphragm pressing section, this invention mechanically presses and fixes the end of the first layer diaphragm of the next battery cell unit to be stacked onto the stacking support section, thereby ensuring the positioning stability of the first layer diaphragm.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing, and more specifically to a stacking device. Background Technology

[0002] A lithium battery cell unit is formed by stacking separators, positive electrode plates, separators, negative electrode plates, and separators in a cyclical manner. After the previous cell unit is stacked, the separator needs to be cut, and before stacking the next cell unit, the separator near the cut end (i.e., the first separator of the next cell to be stacked) is fixed to the side of the stacking table.

[0003] To secure the first-layer separator, the current practice is to install an adsorption plate on the side of the stacked cell support section to position the first-layer separator. However, this adsorption positioning method has poor positioning stability, making it difficult to effectively secure the first-layer separator when stacking cell units in a coating device. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a stacking device, which adopts the following technical solution:

[0005] A stacking device includes a stacking support section, a stacking operation section, a film cutting section, a diaphragm pressing section, and a feeding gripper, wherein:

[0006] The film cutting section is located between the stacked sheet support section and the diaphragm pressing section;

[0007] The stacking operation section is configured to cyclically stack diaphragms and electrodes on the stacking support section to form a cell unit;

[0008] The unloading gripper is configured to remove the stacked battery cell units from the stacking support, and the film cutting part is configured to cut the separator when the unloading gripper removes the battery cell units. The cut end of the separator to be laid in the stacking operation part hangs down into the gap between the stacking support and the separator pressing part.

[0009] The diaphragm pressing part is used to press the cut end of the diaphragm to be laid against the side wall of the stacking support part before stacking the next set of battery cells in the stacking operation part.

[0010] The stacking operation unit first stacks the separator and electrode sheets onto the stacking support unit in a cyclic manner to form a battery cell unit. Next, the unloading grippers remove the stacked battery cell unit from the stacking support unit. Simultaneously, the film cutting unit cuts the separator, separating the battery cell unit from the separator. The separator to be laid near the cut end becomes the first layer separator for the next battery cell to be stacked. Then, the stacking operation unit pulls the cut end of the separator to be laid, causing the cut end to droop into the gap between the stacking support unit and the separator clamping unit. Before the stacking operation unit stacks the next set of battery cell units, the separator clamping unit presses the cut end of the separator against the side wall of the stacking support unit, ensuring that the stacking operation unit can smoothly stack the next battery cell unit. Compared with traditional adsorption positioning methods, the separator clamping unit can significantly improve the positioning stability of the first layer separator, effectively fixing the separator during the stacking operation unit's stacking of battery cell units.

[0011] In some embodiments, the diaphragm pressing part includes a pressing translation mechanism, a mounting plate, and a pressing assembly, wherein: the mounting plate is connected to the drive end of the pressing translation mechanism, and the pressing assembly is mounted on the mounting plate; the pressing translation mechanism is used to drive the pressing assembly to translate toward the stacked support part, so as to drive the pressing assembly to press the cut end of the diaphragm against the side wall of the stacked support part.

[0012] A simple diaphragm pressing part is provided, which drives the pressing assembly to move towards the stacked support part through a pressing translation mechanism, so as to cause the pressing assembly to press the cut end of the diaphragm against the side wall of the stacked support part.

[0013] In some embodiments, the distance between the sidewall of the laminate support portion facing the diaphragm pressing portion and the diaphragm pressing portion gradually decreases from bottom to top. The pressing assembly includes a mounting base and a plurality of pressing blocks elastically mounted on the mounting base. The pressing assembly elastically presses the cut end of the diaphragm against the sidewall of the laminate support portion via the pressing blocks. The end of the pressing block facing the laminate support portion is formed with a pressing tip.

[0014] By providing a clamping tip at the end of the clamping block facing the stacked membrane support, the contact area between the clamping block and the side wall of the stacked membrane support can be reduced. This allows the clamping assembly to move more smoothly upwards along the side wall of the stacked membrane support when the clamping lifting drive mechanism drives the clamping assembly upwards. The distance between the side wall of the stacked membrane support facing the diaphragm clamping part and the diaphragm clamping part gradually decreases from bottom to top. This design ensures that the clamping tip of the clamping block remains pressed against the side wall of the stacked membrane support as it moves upwards along the side wall of the stacked membrane support, following the cut end of the diaphragm.

[0015] In some embodiments, the diaphragm pressing part further includes a pressing lifting drive mechanism, and a pressing translation mechanism is connected to the drive end of the pressing lifting drive mechanism. The pressing lifting drive mechanism is used to drive the pressing assembly to rise via the pressing translation mechanism, so as to drive the pressing assembly to move upward along the side wall of the stacked support part following the cut end of the diaphragm.

[0016] By setting a pressing and lifting drive mechanism, the pressing assembly can move the cut end of the diaphragm upward along the side wall of the stacked support part, ensuring that the cut end of the diaphragm can be pressed by the pressing assembly at the upper side of the stacked support part, and ultimately ensuring that the length of the first layer diaphragm of the cell unit meets the predetermined requirements, that is, approximately equal to the width of the stacked support part.

[0017] In some embodiments, the diaphragm pressing part further includes a pre-pressing component disposed on the mounting plate and located on the side of the pressing component. The pre-pressing component is used to pre-press the diaphragm located on the pressing component onto the pressing component when the diaphragm is cut by the film cutting part. The pre-pressing component includes a pre-pressing drive mechanism and a pressure plate. The pre-pressing drive mechanism is mounted on the mounting plate, and the pressure plate is connected to the drive end of the pre-pressing drive mechanism. The pre-pressing drive mechanism is used to drive the pressure plate to move horizontally and vertically, so as to drive the pressure plate to pre-press the diaphragm onto the pressing component.

[0018] By incorporating a pre-compression assembly, the diaphragm located on the compression assembly is pre-compressed onto the compression assembly when the diaphragm is cut in the film cutting section. The diaphragm located between the compression assembly and the stacking support section is then in a taut state. This ensures that the film cutting section can smoothly cut the diaphragm.

[0019] In some embodiments, the stacked electrode support includes a support lifting mechanism, a first mounting bracket, a support plate, a first pressing mechanism, and a second pressing mechanism, wherein: the first mounting bracket is connected to the drive end of the support lifting mechanism, the support plate is mounted on the first mounting bracket, the support lifting mechanism is used to drive the first mounting bracket to lift and lower to drive the support plate to lift and lower, and the support plate is used to support the diaphragm and electrode; the first pressing mechanism is disposed on the first mounting bracket and located on a first side of the support plate, and the first pressing mechanism is used to press and release the diaphragm and electrode at the first side of the support plate, the first side being the side of the support plate near the diaphragm pressing part; the second pressing mechanism is disposed on the first mounting bracket and located on a second side of the support plate opposite to the first side, and the second pressing mechanism is used to press and release the diaphragm and electrode at the second side of the support plate.

[0020] During the stacking process of electrodes and separators onto the carrier plate, the thickness of the battery cell increases with the number of stacked layers. The carrier plate is raised and lowered by a lifting mechanism, allowing it to support the separators and electrodes stacked by the stacking operation unit at the same stacking height, facilitating the laying of the separators and electrodes and improving laying efficiency. After clamping the separator, the stacking operation unit moves back and forth between the first and second sides of the carrier plate in a Z-shaped motion trajectory. After laying each layer of separator, an electrode is immediately stacked on top of the laid separator. Specifically, when the stacking operation unit pulls the separator towards the first side, the second pressing mechanism presses the separator and electrode at the second side. When the stacking operation unit pulls the separator towards the second side, the first pressing mechanism presses the separator and electrode at the first side.

[0021] In some embodiments, a plurality of clearance grooves are provided on the bearing surface of the carrier plate, and the unloading claws remove the stacked battery cells on the carrier plate through the clearance grooves.

[0022] By setting clearance grooves on the bearing surface of the bearing plate, the unloading claws can smoothly clamp the stacked battery cells on the bearing plate through the clearance grooves and remove the battery cells.

[0023] In some embodiments, the stacked support portion further includes a lifting assembly disposed below the support plate; the lifting assembly includes a lifting cylinder and a support plate, wherein: the lifting cylinder is disposed on the first mounting bracket; the support plate is connected to the drive end of the lifting cylinder, and the support plate is provided with a plurality of support blocks corresponding one-to-one with the clearance grooves, the support blocks being inserted upward into the corresponding clearance grooves; the lifting cylinder is used to drive the support plate to rise and fall, so as to drive each support block to rise and fall within the corresponding clearance groove.

[0024] During the stacking process of the separator and electrode, the lifting cylinder drives the support plate to a high position, making the top surface of the support block flush with the upper surface of the carrier plate. This prevents the electrode and separator from being deformed or indented due to pressure at the clearance groove. When the unloading jaws remove the stacked cell units from the carrier plate, the lifting cylinder drives the support plate to a low position, and the support block leaves the clearance groove, thus avoiding the unloading jaws.

[0025] In some embodiments, the film cutting section includes a second mounting bracket, a cutter, and a cutter lifting mechanism, wherein: the cutter is movably mounted on the second mounting bracket and connected to the drive end of the cutter lifting mechanism; the cutter lifting mechanism is used to drive the cutter to move up and down; when the cutter lifting mechanism drives the cutter to descend to the low clearance position, the cutter enters the gap; when the cutter lifting mechanism drives the cutter to rise to the high position, the cutter extends upward out of the gap to cut the diaphragm.

[0026] By configuring the film-cutting section, it is possible to smoothly cut the diaphragm located above it. In addition, during the process of stacking the electrode and diaphragm to the stacking support by the stacking operation section, and during the process of the pick-up gripper removing the stacked cell unit from the stacking support section, the film-cutting section can retract into the gap to avoid the stacking operation section and the pick-up gripper.

[0027] In some embodiments, the cutting section further includes a heating assembly and a temperature sensor, wherein: the heating assembly is used to heat the cutter, and the heated cutter heats and cuts the diaphragm when it comes into contact with the diaphragm; the temperature sensor is used to detect the temperature of the cutter.

[0028] Heating and cutting the diaphragm with a high-temperature cutter can improve the quality of the cut at the cutting point and prevent the cut from being jagged.

[0029] In some embodiments, the cutting section further includes a cutter limiting assembly, which includes a limiting block and a limiting cylinder, wherein: the limiting block is connected to the bottom of the cutter and a positioning hole is provided on the limiting block; the limiting cylinder is disposed on the second mounting bracket, and when the cutter descends to the clearance low position, the extension rod of the limiting cylinder passes into the positioning hole to lock the cutter.

[0030] When the cutter descends to the clearance low position, the cutter can be locked and positioned at the clearance low position by the cutter limiting component to prevent the cutter from accidentally extending upward and colliding with the stacking operation part and the material handling claw. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the stacking device in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the stacking device without the diaphragm pressing part in an embodiment of the present invention;

[0033] Figure 3 This is a three-dimensional structural diagram of the diaphragm pressing part in an embodiment of the present invention;

[0034] Figure 4 This is a top view of the diaphragm pressing part in an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the disassembled structure of the clamping component in an embodiment of the present invention;

[0036] Figure 6 This is a three-dimensional structural diagram of the clamping block in an embodiment of the present invention;

[0037] Figure 7 This is a side view of the clamping block in an embodiment of the present invention;

[0038] Figure 8 This is a three-dimensional structural diagram of the stacked support portion in an embodiment of the present invention;

[0039] Figure 9 This is a schematic diagram of the front view of the stacked support portion in an embodiment of the present invention;

[0040] Figure 10 This is a three-dimensional structural diagram of the support plate in an embodiment of the present invention;

[0041] Figure 11 This is a side view of the support plate in an embodiment of the present invention;

[0042] Figure 12 This is a three-dimensional structural diagram of the cutting portion in an embodiment of the present invention;

[0043] Figure 13 This is a schematic diagram of the main structure of the cutting section in an embodiment of the present invention;

[0044] Figures 1 to 13 Includes:

[0045] Laminated support section 10:

[0046] Lifting mechanism 11;

[0047] First mounting bracket 12;

[0048] Support plate 13: first side 131, second side 132, inclined side wall 133, elastic connector 134;

[0049] First clamping mechanism 14;

[0050] Second clamping mechanism 15;

[0051] Avoidance groove 17;

[0052] Lifting component 16: Lifting air 161, support plate 362.

[0053] Film cutting department 20:

[0054] Second mounting bracket 21;

[0055] Cutting knife 22;

[0056] Cutting blade lifting mechanism 23;

[0057] Cutting blade limiting assembly 24: limiting cylinder 241, limiting block 242;

[0058] Temperature sensor 25;

[0059] Diaphragm pressing part 30:

[0060] Pressing and lifting drive mechanism 31;

[0061] Pressing and translation mechanism 32;

[0062] Mounting plate 33;

[0063] Clamping assembly 34: mounting base 341, clamping block 342, clamping tip 343;

[0064] Pre-compression assembly 35: Pre-compression drive 351, pressure plate 352. Detailed Implementation

[0065] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0066] To secure the first-layer separator, the current practice is to install an adsorption plate on the side of the stacked cell support section to position the first-layer separator. However, this adsorption positioning method has poor positioning stability, making it difficult to effectively secure the first-layer separator when stacking cell units in a coating device.

[0067] To address the aforementioned problems with existing adsorption positioning methods, this invention provides a stacking device that, after stacking the previous cell unit, can press the end of the first layer diaphragm of the next cell unit to be stacked against the side wall of the stacking support portion.

[0068] like Figure 1 and Figure 2 As shown, the stacking device of the present invention includes a stacking support part 10, a stacking operation part (not shown in the figure), a film cutting part 20, a diaphragm pressing part 30, and a feeding gripper (not shown in the figure), wherein:

[0069] The film cutting section 20 is disposed between the stacked sheet support section 10 and the diaphragm pressing section 20.

[0070] The stacking operation unit is configured to cyclically stack diaphragms and electrodes on the stacking support unit 10 to form a cell unit.

[0071] The unloading gripper is configured to remove the stacked battery cell units from the stacking support 10, and the film cutting part 20 is configured to cut the separator when the unloading gripper removes the battery cell unit. The cut end of the separator to be laid is lowered by the stacking operation part into the gap between the stacking support 10 and the separator pressing part 30.

[0072] The diaphragm pressing part 30 is used to press the cut end of the diaphragm to be laid against the side wall of the stacking support part 10 before stacking the next set of battery cells in the stacking operation part.

[0073] The working process of the stacking device of the present invention is as follows:

[0074] The stacking operation unit cyclically stacks the separator and electrode onto the stacking support unit 10 to form a cell unit.

[0075] Next, the unloading grippers remove the stacked battery cells from the stacking support 10. At the same time, the cutting section 20 cuts the separator, separating the removed battery cells from the separator. At this point, the separator with the cut end, which is supported on the stacking support 10, becomes the first separator for the next battery cell to be stacked.

[0076] Next, the stacking operation unit pulls the cut end of the diaphragm to be laid, so that the cut end of the diaphragm hangs down into the gap between the stacking support part 10 and the diaphragm pressing part 30.

[0077] Before the stacking operation unit stacks the next cell unit, the diaphragm pressing part 30 moves toward the stacking support part 10, thereby pressing the cut end of the diaphragm against the side wall of the stacking support part, thereby ensuring that the stacking operation unit can smoothly stack the next cell unit.

[0078] As can be seen, by setting the diaphragm pressing part, the present invention presses and fixes the end of the first layer diaphragm of the next cell unit to be stacked onto the side wall of the stacking support part 10 by mechanical pressing, thereby ensuring the positioning stability of the first layer diaphragm, that is, when stacking cell units in the stacking operation part, the diaphragm is effectively fixed.

[0079] like Figure 3 and Figure 4 As shown, optionally, the diaphragm pressing part 30 includes a pressing translation mechanism 32, a mounting plate 33, and a pressing assembly 34, wherein: the mounting plate 33 is connected to the drive end of the pressing translation mechanism 32, and the pressing assembly 34 is mounted on the mounting plate.

[0080] During the stacking operation and the unloading gripper taking away the battery cell unit, the clamping assembly 34 is always in a position away from the stacking support part 10.

[0081] After the stacking operation unit pulls the cut end of the diaphragm to be laid into the gap between the stacking support part 10 and the diaphragm pressing part 30, the pressing translation mechanism 32 drives the mounting plate 33 to translate toward the stacking support part 10, which in turn drives the pressing assembly 34 to press the cut end of the diaphragm to be laid onto the side wall of the stacking support part 10.

[0082] Optional, such as Figure 5 and Figure 6As shown, the clamping assembly 34 includes a mounting base 341 and a plurality of clamping blocks 342 elastically mounted on the mounting base 341. The ends of the clamping blocks 342 extend outward from the mounting base 341 and point towards the stacked support portion 10. When the clamping translation mechanism 32 drives the mounting plate 33 to translate toward the stacked support portion 10, the clamping blocks 342 elastically press the cut end of the diaphragm against the side wall of the stacked support portion 10, thereby further improving the clamping effect of the clamping assembly 34 on the cut end of the diaphragm and preventing rigid contact between the clamping assembly 34 and the side wall of the stacked support portion 10 from causing component damage.

[0083] Optionally, the mounting base 341 is provided with a mounting groove, and an elastic connector 344, such as a spring, is provided in the mounting groove. The clamping block 342 is elastically mounted in the mounting groove via the elastic connector 344.

[0084] like Figure 3 and Figure 4 As shown, optionally, the diaphragm pressing part 30 also includes a pressing lifting drive mechanism 31, and a pressing translation mechanism 32 is connected to the drive end of the pressing lifting drive mechanism 31. The pressing lifting drive mechanism 31 is used to drive the pressing assembly 34 to rise via the pressing translation mechanism 32, so as to drive the pressing assembly 34 to move upward along the side wall of the stacked support part 10 following the cut end of the diaphragm.

[0085] By setting the pressing and lifting drive mechanism 31, the pressing assembly 34 can move the cut end of the diaphragm upward along the side wall of the stacked support portion 10, ensuring that the cut end of the diaphragm can be pressed by the pressing assembly 34 at the upper side of the stacked support portion 10, and ultimately ensuring that the length of the first layer diaphragm of the cell unit meets the predetermined requirements, that is, approximately equal to the width of the stacked support portion.

[0086] like Figures 5 to 7 As shown, optionally, the end of the clamping block 342 facing the stacked sheet support portion 10 is formed with a clamping tip 343. This configuration reduces the contact area between the clamping block 342 and the side wall of the stacked sheet support portion 10, and when the clamping lifting drive mechanism 3 drives the clamping assembly 34 to rise, the clamping assembly 34 can move upward along the side wall of the stacked sheet support portion 10 more smoothly following the cut end of the diaphragm.

[0087] Optionally, the diaphragm pressing part 30 also includes a pre-pressing component 35 disposed on the mounting plate 33 and located on the side of the pressing component 34. When the film cutting part 20 cuts the diaphragm, the pre-pressing component 35 is used to pre-press the diaphragm located on the pressing component 30 onto the pressing component 34, so that the diaphragm located between the pressing component 34 and the stacked support part 10 is in a taut state, ultimately ensuring that the film cutting part 10 can more smoothly cut the diaphragm.

[0088] Optionally, the pre-compression assembly 35 includes a pre-compression drive mechanism 351 and a pressure plate 352. The pre-compression drive mechanism 351 is mounted on the mounting plate 33, and the pressure plate 352 is connected to the drive end of the pre-compression drive mechanism 351. The pre-compression drive mechanism 351 is used to drive the pressure plate 352 to move horizontally and vertically, so as to drive the pressure plate 352 to pre-compress the diaphragm onto the compression assembly 34.

[0089] like Figures 8 to 10 As shown, the stacked electrode support 10 includes a support lifting mechanism 11, a first mounting bracket 12, a support plate 13, a first pressing mechanism 14, and a second pressing mechanism 15. The first mounting bracket 12 is connected to the drive end of the support lifting mechanism 11, and the support plate 13 is mounted on the first mounting bracket 12. The support lifting mechanism 11 is used to drive the first mounting bracket 12 to lift and lower, thereby driving the support plate 13 to lift and lower. The support plate 13 is used to support the diaphragm and the electrode.

[0090] During the process of stacking electrodes and separators onto the carrier plate 13, as the number of stacked layers increases, the thickness of the battery cell will continuously increase. By lifting the carrier plate 13 through the carrier lifting mechanism 11, the carrier plate 13 can support the separators and electrodes stacked by the stacking operation unit at the same stacking height, which facilitates the laying of separators and electrodes and can improve laying efficiency.

[0091] A first clamping mechanism 14 is disposed on the first mounting bracket 12 and located on the first side 131 of the support plate 13. The first clamping mechanism 14 is used to clamp and release the diaphragm and electrode at the first side 131 of the support plate 13. The first side 131 is the side of the support plate 13 near the diaphragm clamping part 30. A second clamping mechanism 15 is disposed on the first mounting bracket 12 and located on the second side 132 of the support plate 13 opposite to the first side 131. The second clamping mechanism 15 is used to clamp and release the diaphragm and electrode at the second side 132 of the support plate.

[0092] After clamping the diaphragm, the stacking operation unit moves back and forth between the first side 131 and the second side 132 in a Z-shaped motion trajectory. After each layer of diaphragm is laid, an electrode is stacked on top of the laid diaphragm. Specifically, when the stacking operation unit pulls the diaphragm towards the first side 131, the second pressing mechanism 15 presses the diaphragm and electrode at the second side 132. When the stacking operation unit pulls the diaphragm towards the second side 132, the first pressing mechanism 14 presses the diaphragm and electrode at the first side 131.

[0093] like Figure 10As shown, optionally, the bearing surface of the support plate 13 is provided with a plurality of clearance grooves 17, and the unloading jaws remove the stacked battery cells from the support plate 13 through the clearance grooves 17. For example, the unloading jaws include a pair of upper jaws and lower jaws. When it is necessary to remove the stacked battery cells from the support plate 13, the unloading jaws move as a whole toward the support plate 13, so that the lower jaws penetrate into the clearance grooves 17, and the upper jaws are positioned above the battery cells. By controlling the clamping of the upper jaws and lower jaws, the battery cells can be clamped.

[0094] Optional, such as Figure 8 and Figure 9 As shown, the stacked support portion 10 also includes a lifting assembly 16 disposed below the support plate 13. The lifting assembly 16 includes a lifting cylinder 161 and a support plate 162, wherein: the lifting cylinder 161 is disposed on the first mounting bracket 12. The support plate 162 is connected to the drive end of the lifting cylinder 161, and the support plate 162 is provided with a plurality of support blocks corresponding one-to-one with the clearance grooves 17, and the support blocks are all inserted upward into the corresponding clearance grooves 17. The lifting cylinder 161 is used to drive the support plate 162 to rise and fall, so as to drive each support block to rise and fall within the corresponding clearance groove 17.

[0095] During the stacking process of the diaphragm and electrode, the lifting cylinder 161 drives the support plate 162 to rise to a high position, so that the top surface of the support block is flush with the upper surface of the support plate 13, preventing the electrode and diaphragm from being deformed or indented after being pressed at the clearance groove 16.

[0096] When the unloading gripper removes the stacked battery cells from the support plate 13, the lifting cylinder 161 drives the support plate 162 to descend to a low position, and the support block leaves the clearance groove 17, thereby achieving clearance from the unloading gripper.

[0097] like Figure 11 As shown, optionally, the distance between the sidewall of the support plate 13 facing the diaphragm pressing part 30 and the diaphragm pressing part 30 gradually decreases from bottom to top, that is, the distance between the sidewall of the support plate 13 facing the diaphragm pressing part 30 is... Figure 11 The inclined sidewall 133 is shown. This configuration ensures that the pressing assembly 34 of the diaphragm pressing part 30 remains pressed against the inclined sidewall 133 of the support plate 13 as it moves upward along the cut end of the diaphragm.

[0098] like Figure 12 and Figure 13As shown, the film cutting section 20 includes a second mounting bracket 21, a cutter 22, and a cutter lifting mechanism 23. The cutter 22 is vertically and flexibly mounted on the second mounting bracket 21 and connected to the drive end of the cutter lifting mechanism 23. The blade of the cutter 22 is located at its top. The cutter lifting mechanism 23 drives the cutter 22 to move up and down.

[0099] When the cutter lifting mechanism 23 drives the cutter 22 to descend to the low clearance position, the cutter 22 enters the gap between the stacked sheet support part 10 and the diaphragm pressing part 30.

[0100] When the cutter lifting mechanism 23 drives the cutter 22 to rise to the high position, the cutter 22 extends upward through the gap to contact the diaphragm and cut the diaphragm.

[0101] By configuring the film cutting section 20, it is possible to smoothly cut the diaphragm located above it. In addition, during the stacking operation of the electrode and diaphragm, and when the pick-up gripper removes the cell unit, the film cutting section 20 can retract into the gap to avoid the stacking operation and the pick-up gripper.

[0102] Optionally, the cutter 22 of the film cutting section 20 is a high-temperature cutter. The film cutting section 20 also includes a heating assembly and a temperature sensor 25, wherein: the heating assembly is used to heat the cutter 22, and when the heated cutter 22 contacts the diaphragm, it heats and melts the diaphragm at the contact point to cut the diaphragm. The temperature sensor 25 is used to detect the temperature of the cutter 22, so that the heating assembly can heat the temperature of the cutter 22 to a predetermined value. This prevents the temperature of the cutter 22 from being too low to melt the diaphragm, and prevents the temperature of the cutter 22 from being too high, which would increase the energy consumption of the film cutting section 20.

[0103] Heating the diaphragm with a high-temperature cutter can significantly improve the cut quality and prevent jagged edges. Alternatively, depending on process requirements, the cutter can be used without heating, cutting the diaphragm through its own lifting motion.

[0104] Optionally, the cutting section 20 further includes a cutter limiting assembly 24, which includes a limiting block 242 and a limiting cylinder 241. The limiting block is connected to the bottom of the cutter, and the limiting block 242 has a positioning hole facing the limiting cylinder 241. The limiting cylinder 241 is mounted on the second mounting bracket 21. When the cutter 22 descends to the clearance low position, the telescopic rod of the limiting cylinder 241 passes into the positioning hole on the limiting block 242, thereby locking and positioning the cutter 22 to the clearance low position.

[0105] When the cutter 22 descends to the low avoidance position, the cutter limit component 24 can lock and fix the cutter 22 to prevent the cutter 22 from accidentally extending upward and colliding with the stacking operation part and the picking claw.

[0106] The present invention has been described above in sufficient detail and with certain specificities. Those skilled in the art should understand that the descriptions in the embodiments are merely exemplary, and all changes made without departing from the true spirit and scope of the invention should fall within the protection scope of the invention. The scope of protection claimed by the present invention is defined by the claims, and not by the above descriptions in the embodiments.

Claims

1. A lamination device, characterized by The stacking device includes a stacking support part, a stacking operation part, a film cutting part, a diaphragm pressing part, and a feeding gripper, wherein: The film cutting section is disposed between the stacked sheet support section and the diaphragm pressing section; The stacking operation section is configured to cyclically stack diaphragms and electrodes on the stacking support section to form a cell unit; The feeding gripper is configured to remove the stacked battery cell units from the stacking support portion, and the film cutting portion is configured to cut the separator when the feeding gripper removes the battery cell unit, with the cut end of the separator to be laid by the stacking operation portion hanging down into the gap between the stacking support portion and the separator pressing portion; The diaphragm pressing part is used to press the cut end of the diaphragm to be laid against the side wall of the stacking support part before stacking the next set of battery cells in the stacking operation part; The diaphragm pressing part includes a pressing and translation mechanism, a mounting plate, and a pressing assembly, wherein: The mounting plate is connected to the drive end of the clamping translation mechanism, and the clamping assembly is mounted on the mounting plate; The pressing and translating mechanism is used to drive the pressing assembly to translate toward the stacked support portion, so as to drive the pressing assembly to press the cut end of the diaphragm against the side wall of the stacked support portion; The distance between the sidewall of the stacked sheet bearing portion facing the diaphragm pressing portion and the diaphragm pressing portion gradually decreases from bottom to top; The clamping assembly includes a mounting base and a plurality of clamping blocks elastically mounted on the mounting base. The clamping assembly uses the clamping blocks to elastically press the cut end of the diaphragm against the side wall of the stacked support portion. The end of the clamping block facing the stacked plate bearing portion has a clamping tip.

2. The lamination device of claim 1, wherein The diaphragm pressing part further includes a pressing lifting drive mechanism. The pressing translation mechanism is connected to the drive end of the pressing lifting drive mechanism. The pressing lifting drive mechanism is used to drive the pressing assembly to rise via the pressing translation mechanism, so as to drive the pressing assembly to move upward along the side wall of the stacked support part following the cut end of the diaphragm.

3. The lamination device of claim 1, wherein The diaphragm pressing part further includes a pre-pressing component disposed on the mounting plate and located on the side of the pressing component. The pre-pressing component is used to pre-press the diaphragm located on the pressing component onto the pressing component when the diaphragm is cut by the film cutting part. The pre-compression assembly includes a pre-compression drive mechanism and a pressure plate. The pre-compression drive mechanism is mounted on the mounting plate, and the pressure plate is connected to the drive end of the pre-compression drive mechanism. The pre-compression drive mechanism is used to drive the pressure plate to move horizontally and vertically, so as to drive the pressure plate to pre-compress the diaphragm onto the compression assembly.

4. The lamination apparatus of claim 1, wherein The stacked plate bearing section includes a bearing lifting mechanism, a first mounting bracket, a bearing plate, a first pressing mechanism, and a second pressing mechanism, wherein: The first mounting bracket is connected to the drive end of the bearing lifting mechanism, the bearing plate is mounted on the first mounting bracket, the bearing lifting mechanism is used to drive the first mounting bracket to lift and lower to drive the bearing plate to lift and lower, and the bearing plate is used to support the diaphragm and the electrode sheet; The first clamping mechanism is disposed on the first mounting bracket and located on the first side of the support plate. The first clamping mechanism is used to clamp and release the diaphragm and electrode at the first side of the support plate. The first side is the side of the support plate near the diaphragm clamping part. The second clamping mechanism is disposed on the first mounting bracket and located on the second side of the support plate opposite to the first side. The second clamping mechanism is used to clamp and release the diaphragm and electrode at the second side of the support plate.

5. The lamination device of claim 4, wherein The bearing surface of the bearing plate is provided with several clearance grooves, and the unloading claws remove the stacked battery cell units on the bearing plate through the clearance grooves.

6. The lamination device of claim 5, wherein The stacked support portion also includes a support assembly disposed below the support plate; The lifting assembly includes a lifting cylinder and a support plate, wherein: The lifting cylinder is mounted on the first mounting bracket; The support plate is connected to the drive end of the lifting cylinder. The support plate is provided with a plurality of support blocks that correspond one-to-one with the clearance grooves. The support blocks are inserted upward into the corresponding clearance grooves. The lifting cylinder is used to drive the pallet to rise and fall, so as to move each of the supporting blocks up and down within the corresponding clearance groove.

7. The lamination device of claim 1, wherein The film cutting section includes a second mounting bracket, a cutter, and a cutter lifting mechanism, wherein: The cutter is vertically mounted on the second mounting bracket and connected to the drive end of the cutter lifting mechanism; The cutting blade lifting mechanism is used to drive the cutting blade to rise and fall. When the cutting blade is driven down to the low position, the cutting blade enters the gap. When the cutting blade is driven up to the high position, the cutting blade extends upward out of the gap to cut the diaphragm.

8. The lamination device of claim 7, wherein, The cutting section further includes a heating assembly and a temperature sensor, wherein: The heating component is used to heat the cutter, and when the heated cutter comes into contact with the diaphragm, it heats and cuts the diaphragm. The temperature sensor is used to detect the temperature of the cutter.

9. The lamination apparatus of claim 7, wherein, The cutting section further includes a cutter limiting assembly, which includes a limiting block and a limiting cylinder, wherein: The limiting block is connected to the bottom of the cutter, and the limiting block is provided with a positioning hole; The limiting cylinder is mounted on the second mounting bracket. When the cutter descends to the clearance low position, the telescopic rod of the limiting cylinder passes into the positioning hole to lock the cutter.

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