Cutting assembly, lamination mechanism, and electrode sheet thermal compositing device

Abstract

A cutting assembly, a lamination mechanism, and an electrode sheet thermal compositing device. The cutting assembly comprises at least two cutting blades, the two cutting blades are configured to have a closed state and an open state, and an electrode sheet assembly is located between the two cutting blades. The cutting assembly further comprises a thermal resistance wire which is connected to at least one of the two cutting blades, and used for providing heat to cut blank sections of the electrode sheet assembly. The lamination mechanism comprises at least two lamination platforms arranged side by side, and the cutting assembly is arranged between the lamination platforms. The electrode sheet thermal compositing device comprises the cutting assembly and the lamination mechanism. The blank sections of the electrode sheet assembly are cut by the thermal resistance wire in a melting manner, thereby solving the technical problem of continuous blank section cutting.

Description

Cutting components, lamination mechanisms and pole piece thermal composite equipment

[0001] This application claims priority to the Chinese patent applications filed with the China Patent Office on December 29, 2023, with application number 202323664813.4, and with application number 202420954995.4 filed with the China Patent Office on April 30, 2024. The entire contents of the above applications are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of battery manufacturing equipment, and in particular to a cutting assembly, a lamination mechanism, and a pole piece thermal composite device. Background Art

[0003] Thermal composite lamination is to thermally composite the positive electrode sheet, the negative electrode sheet, and the separator to form a continuous thermal composite unit, and then stack the thermal composite units to form a battery core pack. Two adjacent thermal composite units are connected by a blank section. The blank section is configured to be composed of a separator without positive and negative electrode sheets. During the continuous stacking of the thermal composite units, the blank section between the two adjacent battery core packs needs to be cut off. SUMMARY OF THE INVENTION

[0004] In the related art, since the thickness of the diaphragm is relatively thin, the diaphragm cannot be cut continuously when it is cut using a hardware mold, thereby affecting the continuous progress of the electrode thermal composite process.

[0005] In a first aspect, an embodiment of the present application provides a cutting assembly configured to cut a pole piece assembly, wherein the pole piece assembly includes a plurality of continuous pole piece units and a blank section configured to connect adjacent pole piece units, the cutting assembly comprising:

[0006] At least two cutting knives, the two cutting knives being configured to move toward or away from each other so that the two cutting knives are configured to have a closed state and an open state, and the pole piece assembly is located between the two cutting knives;

[0007] The thermal resistance wire is connected to at least one of the two cutting knives and is configured to provide heat to cut the blank section of the pole piece assembly.

[0008] In a second aspect, an embodiment of the present application provides a lamination mechanism, comprising:

[0009] At least two stacking tables arranged side by side;

[0010] A cutting assembly, the cutting assembly being arranged between the laminating tables, the cutting assembly including the above-mentioned cutting assembly;

[0011] At least one loading assembly is disposed opposite to the lamination table, and the loading assembly can move back and forth on the lamination table.

[0012] In a third aspect, an embodiment of the present application provides a pole piece thermal composite device, which includes the above-mentioned cutting component and a lamination mechanism, and the lamination mechanism is spaced apart from the cutting component; or, the pole piece thermal composite device includes the above-mentioned lamination mechanism. Beneficial effects

[0013] In the cutting assembly provided in the present application, a thermal resistance wire is set on at least one of the first cutting knife and the second cutting knife. When the thermal resistance wire is energized, high-temperature heat is generated. The high-temperature heat is configured to be able to cut the blank section of the electrode assembly in a melting manner, thereby improving the technical problem of continuous cutting of the blank section.

[0014] The stacking mechanism provided in the present application is designed based on the above-mentioned cutting assembly, and its beneficial effects can be found in the beneficial effects of the above-mentioned cutting assembly; further, at least two stacking platforms are arranged side by side, so that after the loading assembly completes stacking on one stacking platform, it can be immediately moved to the other stacking platform for stacking, without waiting for steps such as transferring the core package, and the cutting assembly is arranged between the stacking platforms, so that during the movement of the loading assembly, the diaphragm is cut by the cutting assembly to achieve the purpose of separating the two core packages, thereby optimizing the stacking process and improving the stacking efficiency.

[0015] The electrode thermal composite equipment provided in this application is designed based on the above-mentioned cutting assembly. Its beneficial effects can be found in the beneficial effects of the above-mentioned cutting assembly, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a three-dimensional structural diagram of a pole piece cutting assembly provided in Example 1 of the present application in an open state;

[0017] FIG2 is a three-dimensional structural diagram of the electrode cutting assembly provided in Example 1 of the present application in a closed state;

[0018] FIG3 is a perspective view of the cutting assembly provided in Example 1 of the present application;

[0019] FIG4 is a perspective structural diagram of a first cutter provided in Example 1 of the present application;

[0020] FIG5 is an exploded view of the first cutter provided in Example 1 of the present application;

[0021] FIG6 is a perspective structural diagram of a second cutter provided in Example 1 of the present application;

[0022] FIG7 is a perspective view of a pole piece assembly provided in Example 1 of the present application;

[0023] FIG8 is a perspective view of a pole piece thermal composite device provided in Example 1 of the present application;

[0024] FIG9 is a schematic structural diagram of a lamination mechanism according to Example 2 of the present application;

[0025] FIG10 is a schematic structural diagram of a feeding assembly according to Example 2 of the present application;

[0026] FIG11 is a schematic structural diagram of a lamination table according to Example 2 of the present application;

[0027] FIG12 is an enlarged schematic diagram of area A in FIG11 ;

[0028] FIG13 is an enlarged schematic diagram of area B in FIG11 ;

[0029] FIG14 is a schematic structural diagram of a thermal composite electrode assembly according to Example 2 of the present application;

[0030] Figure Number:

[0031] 100. Electrode thermal recombination equipment; 1. Cutting assembly; 10. First cutter; 11. First cutting blade; 12. Incision; 13. First drive unit; 14. First support base; 20. Second cutter; 21. Second cutting blade; 22. Groove; 23. Second drive unit; 24. Second support base; 30. Thermal resistance wire; 31. Cutting section; 32. Electrical connection section; 321. Positive electrode electrical connection section; 322. Negative electrode electrical connection section; 7. Lamination mechanism; 200. Electrode assembly; 210. Electrode thermal recombination unit; 220. Blank section;

[0032] 33. Driving cylinder; 71. Laminating table; 72. Stop block; 73. Adjusting block; 74. Slot hole; 75. Lifting motor; 4. Loading assembly; 41. Loading frame; 42. Active roller; 43. Driven roller; 8. Linear module; 5. First pressing assembly; 51. Pressing motor; 52. Transmission rod; 53. Cross bar; 54. First pressing plate; 6. Second pressing assembly; 61. Second pressing plate; 62. Pressing cylinder; 63. Pressing unit. Modes for Carrying Out the Invention

[0033] Example 1

[0034] An embodiment of the present application provides a pole piece thermal composite device. As shown in FIG1 , the pole piece thermal composite device 100 includes a thermal composite device (not shown), a cutting assembly 1 , and a lamination mechanism 7 .

[0035] As shown in Figure 2, the electrode assembly 200 includes multiple electrode thermal composite units 210, and two adjacent thermal composite units 210 are connected by a blank section 220. The electrode thermal composite unit 210 includes a positive electrode, a first separator, a negative electrode, and a second separator, and the blank section 220 is configured to be composed only of the separator.

[0036] The thermal composite unit 210 is formed by thermally composite the positive electrode sheet, the negative electrode sheet, and the separator using a thermal composite device. After the blank section 220 in the electrode assembly 200 is cut by the cutting assembly 1, the electrode assembly 200 is formed into multiple groups of electrode thermal composite units 210. Each group of electrode thermal composite units 210 is stacked to form a single battery cell pack.

[0037] Since the blank section 220 is configured to be composed of a diaphragm without positive and negative pole pieces, the thickness of the diaphragm is relatively thin. The use of hardware molds for cutting in related technologies may result in the diaphragm not being able to be cut, thereby affecting the continuous progress of the thermal composite process.

[0038] The embodiments of the present application provide a novel cutting assembly 1 and a pole piece thermal composite device 100 , which can improve the technical problem of continuous cutting of the blank section 220 .

[0039] Referring to Figures 3 to 8, the cutting assembly 1 includes at least two cutting knives arranged opposite to each other and a thermal resistance wire connected to at least one of the two cutting knives. The two cutting knives are configured to move toward or away from each other, so that the two cutting knives are configured to have a closed state and an open state, and the pole piece assembly is located between the two cutting knives. When the two cutting knives are in the closed state, the two cutting knives are configured to clamp the pole piece assembly 200 and cut the blank section 220 in the pole piece assembly 200. When the two cutting knives are in the open state, the gap between the two cutting knives is configured to allow the pole piece assembly 200 to pass through.

[0040] As shown in FIG3 , during the stacking process of the electrode assembly 200, the two cutting blades are in an open state, and the electrode assembly 200 can pass through the gap between the first cutter 10 and the second cutter 20. As shown in FIG4 , when it is necessary to cut the blank section 220 in the electrode assembly 200, the two cutting blades are in a closed state, and the blank section 220 of the electrode assembly 200 is sandwiched between the first cutter 10 and the second cutter 20. The high temperature heat generated by the thermal resistance wire 30 cuts the blank section 220 by high temperature heat melting.

[0041] By installing a thermal resistance wire 30 in at least one of the two cutting blades, the thermal resistance wire 30 generates high-temperature heat when energized, which can fuse the blank section 220 and cut it. The high-temperature hot-melt cutting method ensures that the blank section 220 is quickly cut as soon as it comes into contact with the thermal resistance wire 30, effectively preventing the blank section 220 from being cut continuously.

[0042] In some embodiments, the blank section 220 of the pole piece assembly 200 includes two layers of diaphragms, and the operating temperature of the thermal resistance wire 30 is greater than 180°C.

[0043] The above-mentioned thermal composite electrode unit includes a positive electrode, a first diaphragm, a negative electrode and a second diaphragm stacked in sequence. The blank section 220 is configured to be composed of a first diaphragm and a second diaphragm. The thickness of the single-layer diaphragm is approximately 12 μm. The temperature of the heat that can be generated by the thermal resistance wire 30 after being energized is greater than 180°C. The temperature of the thermal resistance wire 30 is greater than the melting temperature of the diaphragm. Therefore, when the diaphragm contacts the surface of the resistance wire, the thermal resistance wire 30 can quickly melt the diaphragm.

[0044] Further referring to Figures 3 to 7, the two cutting knives include a first cutting knife 11 and a second cutting knife 21, and the first cutting knife 11 is provided with an incision 12 at one end facing the second cutting knife 21. The thermal resistance wire 30 includes a cutting portion 31 and an electrical connection portion 32 connected to each other, and the cutting portion 31 is arranged on the outside of the incision 12 and parallel to the incision 12, and the electrical connection portion 32 is arranged inside the first cutting knife 11.

[0045] The cutting portion 31 of the thermal resistance wire 30 is usually made of alloy materials such as nickel and chromium to form a slender metal wire. Since the strength of the thermal resistance wire 30 itself is relatively weak, during the cutting process, the thermal resistance wire 30 needs to be fixed with the aid of the above-mentioned first cutting knife 11. By setting the cutting portion 31 of the thermal resistance wire 30 at the incision 12 of the first cutting knife 11, during the process of the thermal resistance wire 30 cutting the blank section 220, the cutting portion 31 of the thermal resistance wire 30 abuts against the incision 12 of the first cutting head, so that the thermal resistance wire 30 can be stably maintained on one side of the pole piece assembly 200 and maintain contact with the blank section 220 of the pole piece assembly 200.

[0046] The electrical connection portion 32 of the thermal resistance wire 30 is usually configured as a connecting wire, and the electrical connection portion 32 of the thermal resistance wire 30 is placed inside the first cutting knife 11 to maintain the stability of the thermal resistance wire 30 structure itself.

[0047] The first cutting blade 11 has a first end and a second end that are oppositely arranged, and the incision 12 is arranged at the second end of the first cutting blade 11. The thickness of the first cutting blade 11 gradually becomes thinner from the first end to the second end, and the incision 12 is arranged at the second end of the first cutting blade 11.

[0048] As shown in FIG7 , the electrical connection portion 32 includes a positive electrical connection portion 321 and a negative electrical connection portion 322 . The positive electrical connection portion 321 is provided at one end of the cutting portion 31 , and the negative electrical connection portion 322 is provided at the other end of the cutting portion 31 .

[0049] The first cutting knife 11 is configured as a polyhedron structure, the cutting portion 31 is configured at the incision 12 of the first cutting knife 11, and the cutting portion 31 is configured on the outside of the first cutting knife 11, the thermal resistance wire 30 is fixed to the first cutting knife 11 through the electrical connection portion 32, and the cutting portion 31 is configured as a whole to cut the blank section 220 of the electrode assembly 200, by setting the positive electrode electrical connection portion 321 at one end of the cutting portion 31 and setting the negative electrode electrical connection portion 322 at the other end of the cutting portion 31, the positive electrode electrical connection portion 321 and the negative electrode electrical connection portion 322 are respectively extended to the interior of the first cutting knife 11 for fixation, and the positive electrode electrical connection portion 321 and the negative electrode electrical connection portion 322 are respectively arranged at both ends of the cutting portion 31, which is conducive to maintaining the overall stability of the cutting portion 31, thereby facilitating stable contact between the cutting portion 31 and the blank section 220 of the electrode assembly 200.

[0050] Further referring to FIG. 2 and FIG. 7 , the cutting portion 31 extends in a straight line, and the length L of the cutting portion 31 is greater than the width W of the pole piece assembly 200 ; and / or, the length L of the cutting portion 31 is set to 50 mm to 400 mm.

[0051] The pole piece assembly 200 is configured as a sheet body as a whole. When the first cutting knife 11 and the second cutting knife 21 are in a closed state, the cutting portion 31 is arranged between the first cutting knife 11 and the second cutting knife 21, and the pole piece assembly 200 is between the cutting portion 31 and the second cutting knife 21. The contact between the cutting portion 31 and the pole piece assembly 200 is configured as the entire outer side surface of the cutting portion 31. The cutting portion 31 is configured as a linear extension as a whole, and the length of the cutting portion 31 is set to be greater than the width of the pole piece assembly 200, which is conducive to forming a stable contact between the cutting portion 31 and the blank section 220, so that the cutting portion 31 can quickly cut the blank section 220.

[0052] According to the different width ranges of the electrode assembly 200, in a preferred embodiment, the length of the cutting portion 31 is set to 50 mm to 400 mm. In a specific embodiment, according to the different widths of the electrode assembly 200 to be cut, the cutting portion 31 can be set to 50 mm, 100 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, or a value between any two of the above values ​​or a range between any two of the above values.

[0053] With further reference to FIG. 3 to FIG. 8 , a groove 22 is provided at one end of the second cutting blade 21 facing the first cutting blade 11 , and the groove 22 is configured to accommodate a portion of the cutting portion 31 .

[0054] Since the cutting portion 31 of the thermal resistance wire 30 disposed at the end of the first cutting blade 11 is protruding as a whole relative to the end surface of the first cutting blade 11, a groove 22 is provided at the end of the second cutting blade 21. The groove 22 is used to accommodate a portion of the cutting portion 31, thereby preventing the thermal resistance wire 30 from interfering with the end of the second cutting blade 21 and being damaged. It is understandable that if the end of the second cutting blade 21 that cooperates with the first cutting blade 11 is also provided with a notch, then when the first cutting blade 11 and the second cutting blade 21 are closed, the notch on the second cutting blade 21 will form a hard squeeze on the thermal resistance wire 30 disposed at the notch 12 of the first cutting blade 11, thereby causing the thermal resistance wire 30 to be broken.

[0055] In a preferred embodiment, the depth of the groove 22 is set to 1 mm to 5 mm. In a specific embodiment, the specific depth of the groove 22 can be adjusted according to the outer diameter of the cutting portion 31. Specifically, the depth of the groove 22 can be set to 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, and a value between any two of the above values, or a range between any two of the above values.

[0056] As shown in Figures 3 to 5, the cutting assembly 1 includes two cutters, the first cutting blade 11 is located on one of the two cutters, and the second cutting blade 21 is located on the other of the two cutters. Specifically, the cutting assembly 1 includes a first cutter 10 and a second cutter 20. The first cutter 10 includes a first cutting blade 11, and the second cutter 20 includes a second cutting blade 21. The pole piece assembly 200 is disposed between the first cutter 10 and the second cutter 20.

[0057] In other optional examples, the cutting assembly 1 includes a cutter, which is provided with a hollow inner cavity, and the first cutting knife 11 and the second cutting knife 21 are arranged in the inner cavity of the cutter. The pole piece assembly 200 enters the inner cavity of the cutter through the open end of the cutter and is located between the first cutting knife 11 and the second cutting knife 21.

[0058] Continuing to refer to Figures 3 to 5, the cutter includes a first drive device 13 for driving the first cutting knife 11 and a second drive device 23 for driving the second cutting knife 21. The first drive device 13 and the second drive device 23 are used to synchronously drive the first cutting knife 11 and the second cutting knife 21 to move toward each other or move away from each other, thereby controlling the first cutting knife 11 and the second cutting knife 21 to be in a closed state or an open state.

[0059] When the cutting assembly 1 includes two cutters, the first drive device 13 is located on the first cutter 10, and the second drive device 23 is located on the second cutter 20. When the cutting assembly 1 includes one cutter, the first drive device 13 and the second drive device 23 are located in the same cutter, and the first drive device 13 and the second drive device can be integrated into one body or provided separately.

[0060] The first drive device 13 and the second drive device 23 can be configured as a drive cylinder. The first drive device 13 is connected to the end of the first cutting knife 11 away from the second cutting knife 21, and the second drive device 23 is connected to the end of the second cutting knife 21 away from the first cutting knife 11. When it is necessary to cut the blank section 220 of the pole piece assembly 200, the first drive device 13 drives the first cutting knife 11 to move in a direction close to the second cutting knife 21, and the second drive device 23 synchronously drives the second cutting knife 21 to move in a direction close to the first cutting knife 11. After the blank section 220 of the pole piece assembly 200 is cut, the first drive device 13 drives the first cutting knife 11 to move in a direction away from the second cutting knife 21, and the second drive device 23 synchronously drives the second cutting knife 21 to move in a direction away from the first cutting knife 11.

[0061] Further referring to Figures 3 to 5, the first cutter 10 also includes a first support base 14, and the first driving device 13 and the first cutting knife 11 are fixed on the first support base 14; the second cutter 20 includes a second support base 24, and the second driving device 23 and the second cutting knife 21 are fixed on the second support base 24. The first support base 14 and the second support base 24 are arranged at intervals, and the first cutting knife 11 and the second cutting knife 21 are arranged in the interval between the first support base 14 and the second support base 24.

[0062] When the first drive device 13 and the second drive device 23 drive the first cutting blade 11 and the second cutting blade 21 to move toward or away from each other, the first support seat 14 moves along with the first cutting blade 11, and the second support seat 24 moves along with the second cutting blade 21. Correspondingly, the first cutting blade 11 is fixed to the outside of the first support seat 14, and the second cutting blade 21 is fixed to the outside of the second support seat 24. The first cutting blade 11 and the second cutting blade 21 are both disposed in the gap between the first support seat 14 and the second support seat 24. The minimum gap between the first support seat 14 and the second support seat 24 is configured to accommodate the first cutting blade 11 and the second cutting blade 21.

[0063] Further referring to Figures 3 to 8, the first cutting knife 11 and the second cutting knife 21 are triangular prisms, the width of the first cutting knife 11 decreases in the direction from the first cutting knife 11 to the second cutting knife 21, and the width of the second cutting knife 21 decreases in the direction from the second cutting knife 21 to the first cutting knife 11.

[0064] By setting the first cutting knife 11 and the second cutting knife 21 to a triangular prism shape, while maintaining the overall rigidity of the first cutting knife 11 and the second cutting knife 21, it is beneficial for the end of the first cutting knife 11 pointing to the second cutting knife 21 to form a sharp incision 12, and at the same time, the end of the second cutting knife 21 pointing to the first cutting knife 11 forms a relatively sharp end, which helps to clamp the pole piece assembly 200.

[0065] In other optional examples, the first cutting blade 11 and the second cutting blade 21 may also be configured as other polygonal prisms, such as quadrangular prisms, pentagonal prisms, or hexagonal prisms, etc. Alternatively, the first cutting blade 11 and the second cutting blade 21 may be configured as plate-like structures.

[0066] In the embodiment of the present application, the structure of the cutting assembly 1 is improved, and the thermal resistance wire 30 is provided in at least one of the first cutter 10 and the second cutter 20. The thermal resistance wire 30 generates high-temperature heat when energized. The high-temperature heat is configured to be able to directly cut the blank section 220 of the pole piece assembly 200. Compared with the related art of using a metal mold to physically cut the blank section 220, which will result in continuous cutting, the thermal resistance wire 30 adopts a hot melt cutting method to quickly and effectively cut the blank section 220 of the pole piece assembly 200.

[0067] Furthermore, the electrode thermal composite equipment 100 provided in the embodiment of the present application includes the above-mentioned cutting component 1, and the above-mentioned cutting component 1 is used to quickly and effectively cut the blank section 220 of the electrode component 200, thereby improving the processing speed of the electrode thermal composite equipment 100.

[0068] Example 2

[0069] In the lithium battery manufacturing process, the positive electrode sheets, separators and negative electrode sheets need to be alternately stacked to assemble into battery core packs. The current lithium battery stacking technology routes are mainly divided into four categories: Z-shaped stacking, cutting and stacking, rolling and stacking, and thermal composite stacking. Among them, thermal composite stacking is to thermally composite the positive electrode, negative electrode and separator to form a thermal composite unit, and then stack them. However, the stacking table in the related technology is a single stacking table, that is, after stacking a core pack on the stacking table, the separator needs to be cut first, and then the core pack on the stacking table is transferred to the next process before stacking can be restarted, which affects the stacking efficiency.

[0070] Referring to FIG9 , the present application discloses a lamination mechanism 7, which includes a cutting assembly 1, at least two lamination platforms 71 arranged side by side, and at least one loading assembly 4. In some embodiments, the cutting assembly 1 is arranged between two adjacent lamination platforms 71; the loading assembly 4 is arranged opposite the lamination platforms 71, and the loading assembly 4 is capable of reciprocating motion on the lamination platforms 71. Preferably, by arranging at least two lamination platforms 71 side by side, after the loading assembly 4 completes lamination on one lamination platform 71, the loading assembly 4 can immediately move to the other lamination platform 71 for lamination, without having to wait for steps such as transferring the core package. Furthermore, the cutting assembly 1 is arranged between the lamination platforms 71, so that during the movement of the loading assembly 4, the diaphragm is cut by the cutting assembly 1 to separate the two core packages, thereby optimizing the lamination process and improving the lamination efficiency.

[0071] Optionally, the stacking mechanism 7 may be provided with a plurality of stacking platforms 71. Optionally, the cutting assembly 1 is provided between every two adjacent stacking platforms 71. After the loading assembly 4 completes stacking on one stacking platform 71, the loading assembly 4 may immediately move to the adjacent stacking platform 71 for stacking. Meanwhile, during the movement of the loading assembly 4, the cutting assembly 1 between the two stacking platforms 71 cuts the diaphragm to separate the two core packages, and so on. After the loading assembly 4 completes stacking on the last stacking platform 71, the loading assembly 4 may move in the opposite direction to stack on the penultimate stacking platform 71. The cutting assembly 1 between the last stacking platform 71 and the penultimate stacking platform 71 cuts the diaphragm to separate the two core packages, and the cycle continues, thereby avoiding the influence of steps such as transferring the core packages on the stacking efficiency.

[0072] Optionally, the stacking mechanism 7 may be provided with a plurality of stacking platforms 71. Optionally, every two stacking platforms 71 form a group, and each group of stacking platforms 71 corresponds to one loading assembly 4. After the loading assembly 4 completes stacking on one stacking platform 71, the plurality of loading assemblies 4 may be moved synchronously or individually to another stacking platform 71 in the same group for stacking, and the cutting assembly 1 between the two stacking platforms 71 may cut the diaphragm. Such a cycle may realize the synchronous stacking of multiple core packages and effectively avoid the influence of steps such as transferring the core packages on the stacking efficiency.

[0073] Referring to Figures 9 and 12, in some embodiments, the cutting assembly 1 can be a component such as a knife or saw blade capable of cutting the diaphragm. Preferably, the cutting assembly 1 includes a thermal resistance wire 30, which is configured as an electric thermal resistance wire. The thermal resistance wire 30 is disposed between the lamination platforms 71, and each end of the thermal resistance wire 30 is connected to a drive cylinder 33. That is, the two lamination platforms 71 are symmetrically arranged with the thermal resistance wire 30 as the axis of symmetry. Specifically, when the loading assembly 4 moves from one lamination platform 71 to the other lamination platform 71 for lamination, the drive cylinder 33 drives the thermal resistance wire 30 upward and fuses the diaphragm, thereby improving cutting efficiency. In addition, compared with other cutting tools, the thermal resistance wire 30 is less likely to pose a safety hazard to workers when powered off, effectively ensuring the safety of workers during equipment maintenance. Optionally, the thermal resistance wire 30 can be powered by an external power supply.

[0074] 9 and 10 , in some embodiments, the loading assembly 4 can be a clamp such as a suction cup, a clamping claw, and a manipulator that can stack the thermal composite electrode assembly 200 on the stacking table 71. Optionally, the structure of the thermal composite electrode assembly 200 can be as shown in FIG14 , wherein the negative electrode is arranged between two layers of diaphragms, and the positive electrode is alternately arranged on the outside of the first diaphragm or the second diaphragm. Preferably, the loading assembly 4 includes a loading frame 41, an active roller 42 and a driven roller 43, and the active roller 42 and the driven roller 43 are both rotatably connected to the loading frame 41, and the active roller 42 and the driven roller 43 are arranged parallel to each other so that a loading trough is formed between the active roller 42 and the driven roller 43. Optionally, the thermal composite pole piece assembly 200 is conveyed to the lamination table 71 through the loading trough formed between the active roller 42 and the driven roller 43. Optionally, the driven roller 43 is a hard and smooth roller, and the active roller 42 is a roller with a soft surface and a certain roughness, so that the driven roller 43 can provide sufficient supporting force to the thermal composite pole piece assembly 200, and the active roller 42 can provide sufficient friction force to the thermal composite pole piece assembly 200, thereby clamping the thermal composite pole piece assembly 200 in the loading trough formed between the active roller 42 and the driven roller 43, and can convey the thermal composite pole piece assembly 200 to the lamination table 71. At the same time, the active roller 42 has a soft surface, which can prevent the thermal composite pole piece assembly 200 from being damaged during transportation.

[0075] 9 and 10 , in some embodiments, a linear module 8 is further included, and the loading assembly 4 is connected to the linear module 8 . Optionally, the linear module 8 drives the loading frame 41 to perform a linear reciprocating motion on any of the stacking platforms 71, or to translate from one stacking platform 71 to another stacking platform 71, so that the loading component 4 can be stacked on the stacking platform 71, or moved to another stacking platform 71 to start stacking; optionally, a motor, a belt and a slider can be provided in the linear module 8, wherein the loading frame 41 is fixedly assembled on the slider of the linear module 8. During stacking, the motor drives the slider to perform a linear reciprocating motion through the belt, so that the loading frame 41 follows the slider of the linear module 8 to perform a linear reciprocating motion, thereby driving the active roller 42 and the driven roller 43 to perform a linear reciprocating motion, so that the hot composite electrode assembly 200 transported from the loading trough formed between the active roller 42 and the driven roller 43 to the stacking platform 71 is stacked on the stacking platform 71.

[0076] 9 , 11 , and 13 , in some embodiments, a plurality of stoppers 72 are further included, and the stoppers 72 are assembled on the outer periphery of the lamination platform 71. Optionally, the stoppers 72 can be assembled on the outer periphery of the lamination platform 71 by means of snap fastening, welding, bolting, or other connection methods, thereby defining a lamination area on the lamination platform 71, ensuring the overall alignment of the battery core pack, and preventing poor coating. At the same time, the stoppers 72 on the outer periphery of the lamination platform 71 prevent the thermal composite electrode assembly 200 from sliding off the lamination platform 71.

[0077] Referring to Figures 9, 11, and 13, in some embodiments, the stopper 72 is connected to an adjustment block 73 at one end near the lamination table 71. The adjustment block 73 is provided with a slot 74, and the lamination table 71 is connected to the adjustment block 73 via the slot 74. Optionally, the stopper 72 and the adjustment block 73 are integrally formed, or the stopper 72 is fixedly connected to the adjustment block 73. Optionally, the slot 74 on the adjustment block 73 allows for fine-tuning of the assembly position of the stopper 72 on the lamination table 71, thereby driving the stopper 72 to define the lamination area on the lamination table 71, effectively ensuring the overall alignment of the battery core pack and avoiding poor coating.

[0078] Referring to Figures 9, 11, and 12, in some embodiments, a first pressing assembly 5 is further included, which is arranged on the side of the drive cylinder 33 away from the laminating table 71. The first pressing assembly 5 includes a pressing motor 51, a transmission rod 52, and two first pressing plates 54. The output shaft of the pressing motor 51 is connected to one end of the transmission rod 52, and a cross bar 53 is connected between the other end of the transmission rod 52 and the first pressing plate 54. The first pressing plates 54 are arranged one-to-one opposite to the laminating table 71. Since both ends of the thermal resistance wire 30 are connected to the drive cylinder 33, that is, both ends of the thermal resistance wire 30 are provided with the first pressing assembly 5, optionally, the pressing motor 51 is a rotary motor. The pressing motor 51 drives the transmission rod 52 to rotate so that the two first pressing plates 54 are simultaneously pressed toward the side of the two laminating tables 71 close to the cutting assembly 1, thereby optimizing the number of pressing motors 51 in the pressing assembly and reducing production costs. Optionally, when the thermal composite electrode assembly 200 fails to fall into place on the side of the lamination table 71 close to the cutting assembly 1, the pressing motor 51 drives the transmission rod 52 to rotate so that the first pressing plate 54 is pressed toward the lamination table 71, thereby pressing the thermal composite electrode assembly 200 that fails to fall into place onto the lamination table 71, effectively ensuring that each thermal composite electrode assembly 200 can fall into place and ensuring the overall alignment of the battery core pack.

[0079] Furthermore, after the loading assembly 4 completes lamination on one of the lamination platforms 71, when the loading assembly 4 moves to another lamination platform 71 for lamination, the driving cylinder 33 drives the thermal resistance wire 30 to rise, and at the same time, the pressing motor 51 drives the transmission rod 52 to rotate, so that the two first pressing plates 54 are pressed toward the side of the two lamination platforms 71 close to the cutting assembly 1 at the same time, and drive the diaphragm to abut against the thermal resistance wire 30 for melting, and then the driving cylinder 33 drives the thermal resistance wire 30 to descend, and the two sections of the diaphragm after melting fall into the corresponding lamination platform 71 under the action of the two first pressing plates 54, thereby improving the melting efficiency and avoiding the displacement of the two sections of the diaphragm after melting, thereby ensuring the overall alignment of the battery core pack.

[0080] Referring to Figures 9 and 11, in some embodiments, a second pressing plate 6 is further included. The first pressing plate 5 includes a second pressing plate 61 and a pressing cylinder 62. The second pressing plate 61 is disposed on the side of the lamination table 71 away from the cutting assembly 1, and the output shaft of the pressing cylinder 62 is connected to the second pressing plate 61. Optionally, when a hot composite electrode sheet assembly 200 fails to fall into place on the side of the lamination table 71 away from the cutting assembly 1 and rests on the second pressing plate 61, the pressing cylinder 62 drives the second pressing plate 61 upward to allow the hot composite electrode sheet assembly 200 to fall onto the lamination table 71, effectively ensuring that each hot composite electrode sheet assembly 200 falls into place and ensures the overall alignment of the battery core pack.

[0081] 9 and 11 , in some embodiments, a side of the second pressing plate 61 close to the cutting assembly 1 is protruded outward to form a pressing portion 63 . Optionally, when a plurality of the stacking platforms 71 are provided in the stacking mechanism 7, and the cutting assembly 1 is provided between every two adjacent stacking platforms 71, the second pressing plate 61 only needs to be provided on the first and last stacking platforms 71; optionally, when the thermal composite electrode assembly 200 fails to fall into place on the side of the stacking platform 71 away from the cutting assembly 1 and rests on the second pressing plate 61, the second pressing plate 61 is driven upward by the pressing cylinder 62 to make the thermal composite electrode assembly 200 fall onto the stacking platform 71, and at the same time, the thermal composite electrode assembly 200 is pressed down by the outwardly protruding pressing portion 63 following the second pressing plate 61, so that the thermal composite electrode assembly 200 that fails to fall into place can be better stacked on the thermal composite electrode assembly 200 that has been stacked on the stacking platform 71, thereby further adjusting the overall alignment of the battery core pack.

[0082] 9 and 11 , in some embodiments, a lifting motor 75 is further included, the output shaft of which is connected to the lamination table 71. Optionally, the lifting motor 75 drives the lamination table 71 to move up and down, adjusting the distance between the lamination table 71 and the loading assembly 4 so that the thermal composite electrode assembly 200 can be accurately placed on the lamination table 71.

[0083] 9, 10, 11, 12 and 13, in some embodiments, at least two of the stacking platforms 71 are arranged side by side, and the thermal resistance wire 30 is arranged between the stacking platforms 71, and both ends of the thermal resistance wire 30 are connected to the driving cylinder 33. When the linear module 8 drives the loading assembly 4 from one stacking platform 71 to another stacking platform 71 for stacking, the driving cylinder 33 drives the thermal resistance wire 30 to rise and melt the diaphragm. During stacking, the linear module 8 drives the loading frame 41 to perform a linear reciprocating motion on the stacking platform 71, thereby driving the active roller 42 and the driven roller 43 to perform a linear reciprocating motion, so that the active roller 42 and the driven roller 43 are moved back and forth. The hot composite pole piece assembly 200 is transported to the lamination table 71 by the loading trough formed between the active rollers 42 and the driven rollers 43 and is stacked on the lamination table 71. Optionally, the driven roller 43 is a hard and smooth roller, and the active roller 42 is a roller with a soft surface and a certain roughness, so that the driven roller 43 can provide sufficient supporting force to the hot composite pole piece assembly 200, and the active roller 42 can provide sufficient friction force to the hot composite pole piece assembly 200, thereby clamping the hot composite pole piece assembly 200 in the loading trough formed between the active roller 42 and the driven roller 43, and can transport the hot composite pole piece assembly 200 to the lamination table 71. At the same time, the active roller 42 has a soft surface, which can prevent the hot composite pole piece assembly 200 from being damaged during transportation. Optionally, the two sides in the length direction of the stacking platform 71 are left and right sides, and the two sides in the width direction of the stacking platform 71 are front and back sides. Optionally, the front and back sides of the stacking platform 71 are both equipped with the stop blocks 72. Optionally, the slots 74 on the adjustment blocks 73 are used to fine-tune the assembly position of the stop blocks 72 on the stacking platform 71, thereby driving the stop blocks 72 to limit the stacking area on the stacking platform 71, which can effectively ensure the overall alignment of the battery core pack and avoid poor wrapping. Optionally, the two side ends of the thermal resistance wire 30 are both provided with the first pressing assembly 5. Optionally, the pressing motor 51 is a rotary motor, and the pressing motor 51 drives the transmission rod 52 to rotate so that the two first pressing plates 54 are simultaneously pressed toward the side of the two stacking platforms 71 close to the cutting assembly 1, thereby optimizing the number of pressing motors 51 of the pressing assembly and reducing production costs.Optionally, when the thermal composite electrode assembly 200 fails to fall into place on the side of the lamination table 71 close to the cutting assembly 1, the pressing motor 51 drives the transmission rod 52 to rotate so that the first pressing plate 54 is pressed toward the lamination table 71, thereby pressing the thermal composite electrode assembly 200 that fails to fall into place onto the lamination table 71. Furthermore, after the loading assembly 4 completes lamination on one lamination table 71, the linear module 8 can directly drive the loading assembly 4 to the other lamination table 71 for lamination. At the same time, the pressing motor 51 drives the transmission rod 52 to rotate so that the two first pressing plates 54 are simultaneously pressed toward the side of the two lamination tables 71 close to the cutting assembly 1, driving the diaphragm to abut against the thermal resistance wire 30 for melting, and then the driving cylinder 33 drives the thermal resistance wire 30 to descend, and the two sections of the diaphragm after melting are on the two first pressing plates. 54, it falls into the corresponding lamination platform 71, thereby improving the fusing efficiency and avoiding the displacement of the two sections of the diaphragm after the fusing. Optionally, it also includes a second pressing assembly 6, and the second pressing plate 61 of the second pressing assembly 6 is arranged on the side of the lamination platform 71 away from the cutting assembly 1. The output shaft of the pressing cylinder 62 is connected to the second pressing plate 61. When the thermal composite electrode assembly 200 fails to fall into place on the side of the lamination platform 71 away from the cutting assembly 1 and rests on the second pressing plate 61, the second pressing plate 61 is driven upward by the pressing cylinder 62 to move the second pressing plate 61 so that the thermal composite electrode assembly 200 falls onto the lamination platform 71, effectively ensuring that each thermal composite electrode assembly 200 can fall into place and ensure the overall alignment of the battery core pack. Optionally, the second pressing plate 61 protrudes outward on the side close to the cutting assembly 1 to form a pressing portion 63. Optionally, when the thermal composite electrode assembly 200 fails to fall into place on the side of the stacking table 71 away from the cutting assembly 1 and rests on the second pressure plate 61, the second pressure plate 61 is driven upward by the pressing cylinder 62 to make the thermal composite electrode assembly 200 fall onto the stacking table 71. At the same time, the outwardly protruding pressing portion 63 follows the second pressure plate 61 to press down, pressing the thermal composite electrode assembly 200 downward, so that the thermal composite electrode assembly 200 that fails to fall into place can be better stacked on the thermal composite electrode assembly 200 that has been stacked on the stacking table 71, thereby further adjusting the overall alignment of the battery core pack.

Claims

1. A cutting component (1) configured to cut a pole piece component (200), the pole piece component (200) including a plurality of pole piece units (210) and a plurality of blank segments (220), each of the blank segments (220) being connected between two adjacent pole piece units (210), the pole piece cutting component (1) including: At least two cutting knives (11, 21), the two cutting knives (11, 21) being configured to move in directions approaching or separating from each other so that a closed state and an open state are configured between the two cutting knives (11, 21), and the pole piece component (200) being located between the two cutting knives (11, 21); A thermal resistance wire (30) connected to at least one of the two cutting knives (11, 21) and configured to provide heat to cut the blank segment (220) of the pole piece component (200).

2. The cutting assembly (1) according to claim 1, wherein, The blank segment (220) of the pole piece component (200) includes two layers of separators, and the operating temperature of the thermal resistance wire (30) is greater than 180 °C.

3. The cutting assembly (1) according to claim 1 or 2, wherein, The two cutting knives include a first cutting knife (11) and a second cutting knife (21). An incision (12) is provided at one end of the first cutting knife (11) facing the second cutting knife (21). The thermal resistance wire (30) includes a connected cutting portion (31) and an electrical connection portion (32). The cutting portion (31) is exposed at the incision (12), and the electrical connection portion (32) is arranged inside the first cutting knife (11).

4. The cutting assembly (1) according to claim 3, wherein, The cutting portion (31) is linear, and the length of the cutting portion (31) is greater than the width of the pole piece component (200); and / or, the length of the cutting portion (31) is set to be 50 mm to 400 mm.

5. The cutting assembly (1) according to claim 3, wherein, A groove (22) is provided at one end of the second cutting knife (21) facing the first cutting knife (11), and the groove (22) is configured to accommodate a part of the cutting portion (31).

6. The cutting assembly (1) according to claim 5, wherein, The depth of the groove (22) is set to be 1 mm to 5 mm.

7. The cutting component (1) according to claim 3, wherein, The cutting component (1) includes two cutters (10, 20), the first cutting knife (11) being located on one of the two cutters (10, 20), and the second cutting knife (21) being located on the other of the two cutters (10, 20); or, The cutting component (1) includes a cutter (10, 20) provided with a hollow inner cavity, and the first cutting knife (11) and the second cutting knife (21) are arranged in the inner cavity of the cutter (10, 20).

8. The cutting component (1) according to claim 7, wherein, The cutting devices (10, 20) include a first driving device (13) and a second driving device (23). The first driving device (13) is configured to drive the first cutting knife (11), and the second driving device (23) is configured to drive the second cutting knife (21). The first driving device (13) and the second driving device (23) are configured to synchronously drive the first cutting knife (11) and the second cutting knife (21) to move towards each other or away from each other, thereby controlling the first cutting knife (11) and the second cutting knife (21) to be in a closed state or an open state.

9. The cutting component (1) according to claim 8, wherein, The two cutting devices (10, 20) include a first cutting device (10) and a second cutting device (20). The first cutting device (10) further includes a first support base (14). The first driving device (13) and the first cutting knife (11) are fixed on the first support base (14). The second cutting device (20) includes a second support base (24). The second driving device (23) and the second cutting knife (21) are fixed on the second support base (24). The first support base (14) and the second support base (24) are arranged at intervals. The first cutting knife (11) and the second cutting knife (21) are arranged in the interval between the first support base (14) and the second support base (24).

10. The cutting assembly (1) according to claim 3, wherein, Both the first cutting knife (11) and the second cutting knife (21) are arranged in a triangular prism shape. The width of the first cutting knife (11) decreases in the direction from the first cutting knife (11) towards the second cutting knife (21), and the width of the second cutting knife (21) decreases in the direction from the second cutting knife (21) towards the first cutting knife (11).

11. A lamination mechanism (7) includes: At least two lamination tables (71) arranged side by side; A cutting assembly (1) arranged between the lamination tables (71). The cutting assembly (1) includes the cutting assembly (1) as claimed in claim 1. At least one feeding assembly (4) arranged opposite to the lamination tables (71), and the feeding assembly (4) can move back and forth on the lamination tables (71).

12. The lamination mechanism (7) according to claim 11, wherein, The heating resistance wire (30) is arranged between the lamination tables (71), and both side ends of the heating resistance wire (30) are connected with driving cylinders (33).

13. The lamination mechanism (7) according to claim 12, wherein, It further includes a first pressing plate assembly (5) arranged on the side of the driving cylinder (33) away from the lamination tables (71). The first pressing plate assembly (5) includes a pressing plate motor (51), a transmission rod (52) and two first pressing plates (54). The output shaft of the pressing plate motor (51) is connected to one end of the transmission rod (52). A cross bar (53) is connected between the other end of the transmission rod (52) and the first pressing plate (54), and the second pressing plate (61) is arranged opposite to each lamination table (71).

14. The lamination mechanism (7) according to claim 11, wherein, The feeding component (4) includes a feeding frame (41), a driving roller (42) and a driven roller (43). The driving roller (42) and the driven roller (43) are both rotatably connected to the feeding frame (41), and the driving roller (42) and the driven roller (43) are arranged in parallel with each other, so as to form a feeding groove between the driving roller (42) and the driven roller (43).

15. The lamination mechanism (7) according to claim 14, wherein, It further includes a linear module (8), and the feeding frame (41) is connected to the linear module (8).

16. The lamination mechanism (7) according to any one of claims 11-15, wherein, It further includes a plurality of stoppers (72), and the stoppers (72) are assembled on the outer peripheral side of the lamination table (71).

17. The lamination mechanism (7) according to claim 16, wherein, One end of the stopper (72) close to the lamination table (71) is connected with an adjusting block (73), a slot hole (74) is formed in the adjusting block (73), and the lamination table (71) is connected to the adjusting block (73) through the slot hole (74).

18. The lamination mechanism (7) according to any one of claims 11-15, wherein, It further includes a second pressing component (6), the second pressing component (6) includes a second pressing plate (61) and a pressing cylinder (62), the second pressing plate (61) is arranged on the side of the lamination table (71) away from the cutting component (1), and the output shaft of the pressing cylinder (62) is connected to the second pressing plate (61).

19. The lamination mechanism according to claim 18, wherein, One side of the second pressing plate (61) close to the cutting component (1) bulges outwards to form a pressing part (63).

20. The lamination mechanism (7) according to any one of claims 11-15, wherein, It further includes a lifting motor (75), and the output shaft of the lifting motor (75) is connected to the lamination table (71).

21. A pole piece thermal composite device, the pole piece thermal composite device includes the cutting component (1) according to any one of claims 1-10 and a lamination mechanism (7), the lamination mechanism (7) is arranged at an interval from the cutting component (1); or the pole piece thermal composite device includes the lamination mechanism according to any one of claims 11-20.

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