Thermal compounding device

Abstract

The utility model discloses a thermal compounding device which comprises a compounding roller assembly, the compounding roller assembly comprises two compounding rollers, the surface of at least one compounding roller is provided with a protruding structure, the protruding structure is used for at least conducting thermal compounding on at least part of a diaphragm at the end of a pole piece during rotation, and the protruding structure is arranged in the direction perpendicular to the axis of the compounding roller. The shortest distance formed by the two composite rollers at the protruding structures is a first gap S1, the shortest distance formed by the two composite rollers at the other positions is a second gap S2, and the first gap S1 is smaller than the second gap S2. According to the invention, at least part of the diaphragm at the end part of the pole piece is thermally compounded through the bulge structures, the hot-pressing area of the thermal compounding roller is small, and in the laminated battery cell prepared by the thermal compounding device, the diaphragm and the pole piece are not tightly pressed and attached, so that later electrolyte injection is facilitated, electrolyte infiltration is facilitated, and the overall performance of the battery is improved.

Description

Technical Field

[0001] The present application belongs to the field of battery processing technology, and in particular, relates to a thermal composite device. Background Art

[0002] The hot composite pressing roller mechanism includes two composite rollers. After the two composite rollers are heated, they pressurize the pole piece and diaphragm passing through the middle, thereby achieving the purpose of hot composite. The hot composite roller has a large hot pressing area, and the sides of the diaphragm and the pole piece are completely hot-compounded together. The diaphragm and the pole piece are pressed very tightly, which makes it difficult to inject electrolyte in the later stage and increases the injection time. It also increases the difficulty of electrolyte infiltration and affects the overall performance of the battery. Utility Model Content

[0003] An embodiment of the present application provides a thermal composite device, which thermally composites at least part of the diaphragm around the electrode by arranging a protruding structure on the surface of the composite roller. The hot pressing area of ​​the composite roller is small, and the diaphragm and the electrode are not bonded, thereby achieving the technical effect of facilitating the injection of electrolyte and facilitating the infiltration of the electrolyte.

[0004] The present application embodiment provides a thermal composite device, comprising:

[0005] A composite roller assembly includes two composite rollers, at least one of which has a protruding structure on its surface, which is used to thermally composite at least part of the diaphragm at the end of the pole piece during rotation. Along a direction perpendicular to the axis of the composite roller, the shortest distance formed by the two composite rollers at the protruding structure is a first gap S1, and the shortest distance formed at other positions is a second gap S2, and the first gap S1 is smaller than the second gap S2.

[0006] Optionally, the protrusion structure includes a first protrusion portion, which is axially arranged at one end of the composite roller and extends along the circumference of the composite roller.

[0007] Optionally, the protrusion structure further includes a third protrusion portion, which is axially arranged at the other end of the composite roller and extends along the circumference of the composite roller.

[0008] Optionally, two ends of the first protrusion or two ends of the third protrusion are spaced a certain distance apart.

[0009] Optionally, the protrusion structure further includes a second protrusion portion, the second protrusion portion extends along the axial direction of the composite roller, and the second protrusion portion is located between the first protrusion portion and the third protrusion portion.

[0010] Optionally, one end of the second protrusion extends to the side of the first protrusion and is connected to the first protrusion, and the other end of the second protrusion extends to the side of the third protrusion and is connected to the third protrusion.

[0011] Optionally, the width of the first protrusion is D1, and the width D1 of the first protrusion refers to the distance between two opposite side surfaces of the first protrusion along the axial direction of the composite roller. The width of the second protrusion is D2, and the width D2 of the second protrusion refers to the distance between two opposite side surfaces of the second protrusion extending along the axial direction of the composite roller. The width of the third protrusion is D3, and the width D3 of the third protrusion refers to the distance between two opposite side surfaces of the third protrusion along the axial direction of the composite roller, wherein D1=D3, and / or D2>D1.

[0012] Optionally, the width of the first raised portion is D1, and the width D1 of the first raised portion refers to the distance between two opposite side surfaces of the first raised portion along the axial direction of the composite roller. The width of the second raised portion is D2, and the width D2 of the second raised portion refers to the distance between two opposite side surfaces of the second raised portion extending along the axial direction of the composite roller. The width of the third raised portion is D3, and the width D3 of the third raised portion refers to the distance between two opposite side surfaces of the third raised portion along the axial direction of the composite roller, wherein one of D1, D2 and D3 satisfies one of the following ranges: 2mm≤D1≤5mm, 4mm≤D2≤10mm, 2mm≤D3≤5mm.

[0013] Optionally, the height of the protruding structure is H, where 1 mm ≤ H ≤ 5 mm.

[0014] Optionally, when both composite rollers are provided with protruding structures, a first gap S1 is formed between the protruding structures of the two composite rollers along a direction perpendicular to the axis of the composite roller.

[0015] The thermal composite device provided in the embodiment of the present application includes a thermal composite roller assembly, which includes two composite rollers. The surface of at least one composite roller is provided with a protruding structure. Along the direction perpendicular to the axis of the composite roller, the first gap formed by the two composite rollers at the protruding structure is smaller than the second gap formed at other positions. Only the protruding structure is in contact with the diaphragm, so that at least a part of the diaphragm at the end of the electrode piece is thermally composited through the protruding structure. The hot pressing area of ​​the protruding structure on the thermal composite roller is small. In the stacked battery cell prepared by the thermal composite device, the diaphragm and the electrode piece are not pressed tightly together, which is convenient for the subsequent electrolyte injection, conducive to the infiltration of the electrolyte, and improves the overall performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0017] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0018] Figure 1 This is a three-dimensional schematic diagram of a thermal composite device provided in an embodiment of the present application.

[0019] Figure 2 A side view of a thermal composite device provided in an embodiment of the present application.

[0020] Figure 3 Schematic diagram of a composite monomer prepared by a thermal composite device provided in an embodiment of the present application.

[0021] Figure 4 A partial side view of a thermal composite device provided in an embodiment of the present application.

[0022] Figure 5 for Figure 4 Middle AA section view.

[0023] Figure 6 Another partial side view of the thermal composite device provided in an embodiment of the present application.

[0024] Figure 7 for Figure 6 Middle BB section view.

[0025] Figure 8 for Figure 6 Middle CC section view.

[0026] Fig. 9 This is a labeled diagram of a thermal composite device provided in an embodiment of the present application.

[0027] Fig.10 for Figure 4 Middle DD section view. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0029] See also Figure 1 and Figure 2, a thermal composite device 10 provided in an embodiment of the present application, the thermal composite device 10 includes a composite roller assembly 100, which includes a first composite roller 111 and a second composite roller 112. The first composite roller 111 and the second composite roller 112 are arranged with an interval up and down. The first composite roller 111 is located above the second composite roller 112. A protruding structure 400 is provided on the surface of at least one composite roller 110, such as a protruding structure 400 is provided on the first composite roller 111, or a protruding structure 400 is provided on the second composite roller 112, or a protruding structure 400 is provided on both the first composite roller 111 and the second composite roller 112. Along the direction perpendicular to the axis of the composite roller 110, the shortest distance formed by the two composite rollers 110 at the protruding structure 400 is the first gap S1, and the shortest distance formed at other positions is the second gap S2, and the first gap S1 is smaller than the second gap S2. For example, when the protruding structure 400 is disposed on the first composite roller 111, a first gap S1 is formed between the protruding structure 400 and the second composite roller 112, and a second gap S2 is formed between the first composite roller 111 except for the protruding structure 400 and the second composite roller 112. The protruding structure 400 is used to thermally composite at least a portion of the diaphragm at the end of the pole piece during rotation.

[0030] In the present application examples, see Figure 3 , a composite monomer 20 is prepared by using a thermal composite device 10, and the composite monomer 20 is folded to prepare a laminated battery cell. Among them, the composite monomer 20 includes two layers of diaphragms 21, pole pieces 22 and pole ears 23. The two layers of diaphragms 21 are respectively a first diaphragm and a second diaphragm, and the first diaphragm and the second diaphragm are continuous strip structures. The first diaphragm and the second diaphragm are arranged in parallel. The first diaphragm and the second diaphragm pass between the first composite roller 111 and the second composite roller 112, and the raised structure 400 acts on the diaphragm 21, so that the first diaphragm at at least one end of the pole piece 22 is thermally composited and connected with the second diaphragm to fix the pole piece 22. The hot pressing area of ​​the raised structure 400 is small, and the diaphragm and the pole piece are not pressed tightly together, which is convenient for the later electrolyte injection, conducive to the infiltration of the electrolyte, and improves the overall performance of the battery. The thermal composite device has a simple structure and convenient processing and operation.

[0031] In some embodiments, the thermal composite device 10 further includes a heating component 200 and a driving component 300 .

[0032] In the present application examples, see Figure 1 and Figure 2The heating assembly 200 is connected to at least one composite roller 110, and the heating assembly 200 is used to heat at least one composite roller 110. Exemplarily, the heating assembly 200 is connected to the first composite roller 111, and the heating assembly 200 heats the first composite roller 111; or, the heating assembly 200 is connected to the second composite roller 112, and the heating assembly 200 heats the second composite roller 112; or, the heating assembly 200 is connected to both the first composite roller 111 and the second composite roller 112, and the heating assembly 200 heats both the first composite roller 111 and the second composite roller 112. The heat generated by the heating assembly 200 is transferred to the protruding structure 400, and the protruding structure 400 acts on the diaphragm to achieve thermal bonding of the diaphragm.

[0033] In the present application examples, see Figure 1 and Figure 2 The driving assembly 300 is connected to at least one composite roller 110, and the driving assembly 300 is used to drive the composite roller 110 to rotate. Exemplarily, the driving assembly 300 is connected to the first composite roller 111, and the first composite roller 111 drives the second composite roller 112 to rotate, or the driving assembly 300 is connected to the second composite roller 112, and the second composite roller 112 rotates the first composite roller 111 to rotate, or the driving assembly 300 is connected to both the first composite roller 111 and the second composite roller 112, and the driving assembly 300 drives the first composite roller 111 and the second composite roller 112 to rotate simultaneously. The first composite roller 111 and the second composite roller 112 have the same rotation speed and opposite rotation directions.

[0034] In some embodiments, see Figure 1 , Figure 6 and Figure 7 The protrusion structure 400 includes a first protrusion portion 410 , which is axially disposed at one end of the composite roller 110 and extends along the circumference of the composite roller 110 .

[0035] In the embodiment of the present application, the first protrusion 410 is arranged at a position close to the end of the composite roller 110, and the first protrusion 410 extends in the circumferential direction. As the composite roller 110 rotates, the first protrusion 410 thermally composites the diaphragms 21 on both sides of one end of the pole piece, thereby limiting the position of the pole piece 22 in the diaphragm 21.

[0036] In some embodiments, see Figure 1 , Figure 6 and Figure 7 The protrusion structure 400 includes a first protrusion 410 and a third protrusion 430. The first protrusion 410 is axially disposed at one end of the composite roller 110 and extends along the circumference of the composite roller 110, and the third protrusion 430 is axially disposed at the other end of the composite roller 110 and extends along the circumference of the composite roller 110.

[0037] In the embodiment of the present application, the protruding structure 400 includes a first protruding portion 410 and a third protruding portion 430. As the composite roller 110 rotates, the first protruding portion 410 thermally composites the two layers of diaphragm 21 at one end of the pole piece, and the third protruding portion 430 thermally composites the two layers of diaphragm 21 at the other end of the pole piece, thereby limiting the position of the pole piece between the two layers of diaphragm 21, preventing the pole piece from moving along the width direction of the diaphragm 21, and ensuring the alignment of the stacked battery cell.

[0038] In some embodiments, see Figure 1 , Figure 6 and Figure 7 , two ends of the first protrusion 410 or two ends of the third protrusion 430 are spaced a certain distance apart.

[0039] In the embodiment of the present application, the first protrusion 410 or the third protrusion 430 is a discontinuous circle to avoid the position of the pole ear on the pole piece, avoid thermal composite connection between the diaphragm 21 and the pole ear, facilitate the subsequent electrolyte injection, promote the infiltration of the electrolyte, and improve the overall performance of the battery.

[0040] In some embodiments, see Figure 1 , Figure 6 and Figure 7 , the raised structure 400 includes a first raised portion 410, a second raised portion 420 and a third raised portion 430. The first raised portion 410 and the third raised portion 430 extend along the circumference of the composite roller 110, and the two ends of the first raised portion 410 or the third raised portion 430 are spaced a certain distance apart. To form an opening of the bag-type structure 24, at least part of the structure of the pole ear 23 on the pole piece 22 extends from the opening to the outside of the diaphragm 21. The first raised portion 410 is close to one end of the composite roller 110, and the third raised portion 430 is close to the other end of the composite roller 110. The second raised portion 420 extends along the axis of the composite roller 110, and the second raised portion 420 is located between the first raised portion 410 and the third raised portion 430. The first raised portion 410, the second raised portion 420 and the third raised portion 430 can be continuous linear structures. For example, the raised structure 400 is "I-shaped" when unfolded along the surface of the composite roller 110. The first raised portion 410, the second raised portion 420 and the third raised portion 430 may also be a non-continuous linear structure. For example, a plurality of convex point structures are used. The first raised portion 410, the second raised portion 420 or the third raised portion 430 may include a plurality of pressing lines, and adjacent pressing lines are arranged at intervals, or may include only one pressing line with a certain width. The positions where the first raised portion 410, the second raised portion 420 and the third raised portion 430 are arranged depend on the required size of the composite roller 110 and the size of the processed bag structure 24.

[0041] In the present application examples, see Fig. 9The first protrusion 410 and the third protrusion 430 are used to thermally composite the diaphragms at the ends of the pole pieces, respectively, and the second protrusion 420 is used to thermally composite the diaphragms at the sides of the pole pieces. The protrusion structure 400 thermally composites the first diaphragm at the ends and sides of the pole piece with the second diaphragm to form a bag structure 24. As the diaphragm advances, the protrusion structure 400 processes a plurality of bag structures 24, and the plurality of bag structures 24 are arranged in sequence along the length direction Y. The pole piece is fixed between the first diaphragm and the second diaphragm through the bag structure 24. The probability of short circuits caused by contact between adjacent pole pieces is reduced, and the reliability of the laminated battery cell is improved.

[0042] In some embodiments, see Fig. 9 , the width of the first protrusion 410 is D1, the width of the second protrusion 420 is D2, and the width of the third protrusion 430 is D3. The width D1 of the first protrusion 410 refers to the distance between the two opposite side surfaces of the first protrusion 410 along the axial direction of the composite roller 110. The width D2 of the second protrusion 420 refers to the distance between the two opposite side surfaces of the second protrusion 420 extending along the axial direction of the composite roller 110. The width D3 of the third protrusion 430 refers to the distance between the two opposite side surfaces of the third protrusion 430 along the axial direction of the composite roller 110. Wherein, D1=D3.

[0043] In the embodiment of the present application, the first protrusion 410 and the third protrusion 430 have the same width, and the diaphragms at both ends of the electrode are thermally composited through the first protrusion 410 and the third protrusion 430, and the width of the diaphragm thermal composite connection is the same.

[0044] In other embodiments, the width D1 of the first protrusion 410 is different from the width D3 of the third protrusion 430 , such as D1 < D3 , or D1 > D3 .

[0045] In some embodiments, see Fig. 9 , the width of the first protrusion 410 is D1, and the width of the second protrusion 420 is D2, wherein D2>D1. The width of the diaphragm thermal composite connection at the end of the pole piece is smaller than the width of the diaphragm thermal composite connection at the side of the pole piece. Specifically, the design of the width of the first protrusion 410 and the width of the second protrusion 420 can be comprehensively considered based on the relationship between the size of the pole piece and the size of the diaphragm. In the case of more diaphragm redundancy, the width of the thermal composite connection can be appropriately increased to ensure the connection effect.

[0046] In some embodiments, see Fig. 9, one of D1, D2 and D3 satisfies one of the following ranges: 2mm≤D1≤5mm, 4mm≤D2≤10mm, 2mm≤D3≤5mm. The value of D1 is 2mm, 2.3mm, 2.8mm, 3mm, 3.5mm, 4mm, 4.2mm, 4.7mm, 5mm or other specified values. The value of D2 is 4mm, 4.3mm, 5mm, 5.6mm, 6mm, 6.7mm, 7mm, 7.5mm, 8mm, 8.2mm, 9mm, 9.4mm, 10mm or other specified values. The value of D3 is 2mm, 2.5mm, 3mm, 3.3mm, 3.7mm, 4mm, 4.5mm, 5mm or other specified values.

[0047] In the embodiment of the present application, the width design of the first protrusion 410, the second protrusion 420 and the third protrusion 430 ensures the strength of the thermal composite connection while avoiding a wide width that increases the waste of diaphragm materials and reduces costs.

[0048] In some embodiments, see Fig. 9 , the height of the protruding structure 400 is H, wherein 1mm≤H≤5mm. The value of H is 1mm, 1.6mm, 2mm, 2.5mm, 3mm, 3.3mm, 3.7mm, 4mm, 4.5mm, 5mm or other listed values. The height of the protruding structure 400 refers to the distance between the side of the protruding structure 400 that is away from the axis and the surface of the composite roller 110.

[0049] In the embodiment of the present application, the height design of the protruding structure 400 can meet the requirements of thermal composite connection. The probability of the diaphragm and the pole piece being thermally compositely connected due to the small height of the protruding structure 400 and the area outside the protruding structure 400 on the composite roller 110 being close to the diaphragm is reduced, and the probability of the heat being unable to be transferred to the surface of the protruding structure 400 due to the high height of the protruding structure 400, which affects the thermal composite connection effect, is reduced.

[0050] In some embodiments, see Figure 1 and Figure 2 When both composite rollers 110 are provided with the protruding structures 400, a first gap S1 is formed between the protruding structures of the two composite rollers 110 in a direction perpendicular to the axis of the composite roller 110. For example, the first composite roller 111 is provided with the protruding structure 400, and the second composite roller 112 is provided with the protruding structure 400. The first gap S1 is formed between the protruding structures 400 on the first composite roller 111 and the protruding structures 400 on the second composite roller 112.

[0051] In the embodiment of the present application, the raised structures 400 on the two composite rollers 110 are arranged opposite to each other. When performing a thermal composite operation, the raised structure 400 on the first composite roller 111 and the raised structure 400 on the second composite roller 112 are respectively located on the upper and lower sides of the same position of the diaphragm, and the thermal composite connection effect is good.

[0052] In other embodiments, when both composite rollers 110 are provided with the protruding structure 400, the first composite roller 111 is provided with the protruding structure 400, and a first gap S1 is formed between the protruding structure 400 on the first composite roller 111 and the second composite roller 112; the second composite roller 112 is provided with the protruding structure 400, and a first gap S1 is formed between the protruding structure 400 on the second composite roller 112 and the first composite roller 111. The projection of the protruding structure 400 on the first composite roller 111 on the second composite roller 112 is arranged adjacent to the protruding structure 400 on the second composite roller 112. When performing the thermal composite operation, the thermal composite connection position formed on the diaphragm by the protruding structure 400 on the first composite roller 111 is arranged adjacent to the thermal composite connection position formed on the diaphragm by the protruding structure 400 on the second composite roller 112.

[0053] In some embodiments, see Figure 1 and Figure 2 The composite roller assembly 100 further includes a bracket 140 and a connecting shaft 130. The end of the composite roller 110 is fixedly connected to the connecting shaft 130, and the connecting shaft 130 is rotatably connected to the bracket 140. Exemplarily, the bracket 140 includes a first support block 141, a second support block 142, a third support block 143 and a fourth support block 144. The first support block 141 is arranged at one end of the first composite roller 111, and the second support block 142 is arranged at the other side of the first composite roller 111. The connecting shaft 130 is arranged at both ends of the first composite roller 111, and the connecting shaft 130 is arranged coaxially with the first composite roller 111. The connecting shaft 130 at one end of the first composite roller 111 is inserted into the first support block 141, and the connecting shaft 130 is rotatably connected to the first support block 141. The connecting shaft 130 at the other end of the first composite roller 111 is inserted into the second support block 142, and the connecting shaft 130 is rotatably connected to the second support block 142. The third support block 143 and the fourth support block 144 are respectively arranged at both ends of the second composite roller 112. A connecting shaft 130 is arranged at both ends of the second composite roller 112, and the connecting shaft 130 is arranged coaxially with the second composite roller 112. The connecting shaft 130 at one end of the second composite roller 112 is inserted into the third support block 143, and the connecting shaft 130 is rotatably connected to the third support block 143. The connecting shaft 130 at the other end of the second composite roller 112 is inserted into the fourth support block 144, and the connecting shaft 130 is rotatably connected to the fourth support block 144.

[0054] In the embodiment of the present application, the composite roller 110 is rotatably connected to the bracket 140 via the connecting shaft 130 , and the bracket 140 supports the composite roller 110 , so as to facilitate the installation and disassembly of the composite roller 110 .

[0055] In some embodiments, see Figure 2 , Figure 4 and Figure 5 The heating assembly 200 includes a plurality of heating rods 210, and the heating rods 210 are arranged in the composite roller 110. Eight heating rods 210 are arranged in the composite roller 110, each heating rod 210 extends along the axial direction of the composite roller 110, and the length of the heating rod 210 is substantially the same as the length of the composite roller 110. The plurality of heating rods 210 are arranged at intervals along the circumference of the composite roller 110. The distance between any two adjacent heating rods 210 is the same. All the heating rods 210 are located on the same circumference, and the distance between each heating rod 210 and the surface of the composite roller 110 is the same. When both the first composite roller 111 and the second composite roller 112 generate heat, a plurality of heating rods 210 are arranged in the first composite roller 111, and a plurality of heating rods 210 are arranged in the second composite roller 112.

[0056] In the embodiment of the present application, the composite roller 110 is heated by arranging a plurality of heating rods 210 in the composite roller 110. The plurality of heating rods 210 are arranged at intervals along the circumference of the composite roller 110 to ensure that the temperature at each position of the hot composite roller 110 is the same and the heat is uniform, thereby ensuring the thermal composite effect.

[0057] In some embodiments, see Figure 2 , Figure 4 and Figure 5 The heating assembly 200 further includes a power supply ring 220, which is in a circular ring structure. The power supply ring 220 is sleeved on the connecting shaft 130, and the power supply ring 220 is fixedly connected to the connecting shaft 130. The power supply ring 220 is connected to the end of the heating rod 210 through a wire 230. Exemplarily, two power supply rings 220 are provided, which are respectively provided at the two ends of the composite roller 110, the negative end of the heating rod 210 is connected to one power supply ring 220 through a wire 230, and the positive end of the heating rod 210 is connected to another power supply ring 220 through a wire, and the power supply ring 220 realizes the series connection or parallel connection of multiple heating rods 210.

[0058] In the embodiment of the present application, a power ring 220 is provided on the connecting shaft 130 , the power ring 220 rotates with the connecting shaft 130 , and the power ring 220 is connected to the wire 230 , thereby reducing the probability of the wire 230 being entangled due to the rotation of the composite roller 110 .

[0059] In some embodiments, see Figure 2The driving assembly 300 includes a first motor 310, a connecting shaft 130 is provided at the end of the composite roller 110, and the output end of the first motor 310 is connected to the connecting shaft 130. Exemplarily, the output end of the first motor 310 is connected to the connecting shaft 130 at the end of the first composite roller 111, the first motor 310 drives the first composite roller 111 to rotate, and the first composite roller 111 drives the second composite roller 112 to rotate. Alternatively, the output end of the first motor 310 is connected to the connecting shaft 130 at the end of the second composite roller 112, the first motor 310 drives the second composite roller 112 to rotate, and the second composite roller 112 drives the first composite roller 111 to rotate.

[0060] See also Figure 2 The driving assembly 300 includes two first motors 310, one of which is connected to the connecting shaft 130 at one end of the first composite roller 111, and the other first motor 310 is connected to the connecting shaft 130 at one end of the second composite roller 112. The two motors 310 have the same rotation speed and opposite rotation directions.

[0061] In the embodiment of the present application, the composite roller 110 is driven to rotate by the first motor 310 , which has a simple structure and a high degree of automation.

[0062] In some embodiments, see Figure 2 and Figure 4 The hot composite device further includes a lifting mechanism 500, which is connected to one of the composite rollers 110 and is used to adjust the size of the gap 120 between the two composite rollers 110. Exemplarily, the lifting mechanism 500 is connected to the first composite roller 111, and the lifting mechanism 500 drives the first composite roller 111 to move toward or away from the second composite roller 112 to adjust the gap 120 between the first composite roller 111 and the second composite roller 112.

[0063] In the embodiment of the present application, a lifting mechanism 500 is provided to adjust the size of the gap 120 between the two composite rollers 110 so that the thermal composite device 10 can be used for thermal composite connection of diaphragms of different thicknesses. The adjustment operation is simple and the application range is wide.

[0064] In some embodiments, see Figure 2 , Figure 4 and Figure 5 The lifting mechanism 500 includes a second motor 510 and a screw pair 520 . The screw pair 520 connects the second motor 510 and the connecting shaft 130 . The axis of the screw pair 520 is arranged perpendicular to the axis of the connecting shaft 130 .

[0065] For example, see Figure 2 and Figure 4The lifting mechanism 500 includes two second motors 510 and two screw pairs 520, wherein one screw pair 520 connects one of the second motors 510 and the connecting shaft 130 at one end of the first composite roller 111, and the other screw pair 520 connects the other second motor 510 and the connecting shaft 130 at the other end of the first composite roller 111. The two second motors 510 simultaneously drive the first composite roller 111 to move from both ends of the first composite roller 111. Ensure that the distance between the axis of the first composite roller 111 and the axis of the second composite roller 112 is consistent.

[0066] In the embodiment of the present application, the lifting and lowering of the composite roller 110 is achieved by the second motor 510 and the screw pair 520, which has a simple structure, convenient adjustment operation and high adjustment accuracy.

[0067] In some embodiments, see Figure 2 and Figure 5 The composite roller assembly 100 further includes a connecting block 150 , which is sleeved on the connecting shaft 130 , and one end of the screw pair 520 away from the second motor 510 is connected to the connecting block 150 , and the connecting block 150 is slidably connected to the bracket 140 .

[0068] For example, see Figure 5 and Fig.10 The composite roller assembly 100 includes two connecting blocks 150, namely a first connecting block 151 and a second connecting block 152. The first connecting block 151 is sleeved on the connecting shaft 130 at one end of the first composite roller 111, and the first connecting block 151 is rotatably connected to the connecting shaft 130. The second connecting block 152 is sleeved on the connecting shaft 130 at the other end of the first composite roller 111, and the second connecting block 152 is rotatably connected to the connecting shaft 130. The first connecting block 151 is installed in the first supporting block 141, and the screw pair 520 passes through the first supporting block 141 and is fixedly connected to the first connecting block 151, and the screw pair 520 drives the first connecting block 151 to slide in a direction perpendicular to the connecting shaft 130. The second connecting block 152 is installed in the second supporting block 142, and the screw pair 520 passes through the second supporting block 142 and is fixedly connected to the second connecting block 152, and the screw pair 520 drives the second connecting block 152 to slide in a direction perpendicular to the connecting shaft 130. The connecting shaft 130 at one end of the first composite roller 111 extends out of the first supporting block 141 and is connected to the first motor 310 .

[0069] In the embodiment of the present application, the screw pair 520 of the lifting mechanism 500 is assembled with the bracket 140 through the connecting block 150, and the composite roller assembly 100 is connected to the lifting mechanism 500, which has a compact structure and occupies a small space.

[0070] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0071] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0072] The thermal composite device provided in the embodiment of the present application is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technicians in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A thermal composite device (10), characterized in that: include: A composite roller assembly (100) comprises two composite rollers (110), wherein a surface of at least one of the composite rollers (110) is provided with a protruding structure (400), wherein the protruding structure (400) is used to thermally composite at least a portion of the diaphragm at the end of the pole piece during rotation, wherein along a direction perpendicular to the axis of the composite roller (110), the shortest distance formed by the two composite rollers (110) at the protruding structure (400) is a first gap S1, and the shortest distance formed at other positions is a second gap S2, wherein the first gap S1 is smaller than the second gap S2.

2. The thermal composite device (10) according to claim 1, characterized in that: The protrusion structure (400) comprises a first protrusion portion (410), wherein the first protrusion portion (410) is axially arranged at one end of the composite roller (110) and extends along the circumference of the composite roller (110).

3. The thermal composite device (10) according to claim 2, characterized in that: The protrusion structure (400) further comprises a third protrusion portion (430), wherein the third protrusion portion (430) is axially arranged at the other end of the composite roller (110) and extends along the circumference of the composite roller (110).

4. The thermal composite device (10) according to claim 3, characterized in that: There is a certain distance between two ends of the first protrusion (410) or two ends of the third protrusion (430).

5. The thermal composite device (10) according to claim 3, characterized in that: The protrusion structure (400) further comprises a second protrusion (420), wherein the second protrusion (420) extends along the axial direction of the composite roller (110), and the second protrusion (420) is located between the first protrusion (410) and the third protrusion (430).

6. The thermal composite device (10) according to claim 5, characterized in that: One end of the second protrusion (420) extends to the side of the first protrusion (410) and is connected to the first protrusion (410), and the other end of the second protrusion (420) extends to the side of the third protrusion (430) and is connected to the third protrusion (430).

7. The thermal composite device (10) according to claim 5, characterized in that: The width of the first protrusion (410) is D1, and the width D1 of the first protrusion (410) refers to the distance between the two opposite side surfaces of the first protrusion (410) along the axial direction of the composite roller (110). The width of the second protrusion (420) is D2, and the width D2 of the second protrusion (420) refers to the distance between the two opposite side surfaces of the second protrusion (420) extending along the axial direction of the composite roller (110). The width of the third protrusion (430) is D3, and the width D3 of the third protrusion (430) refers to the distance between the two opposite side surfaces of the third protrusion (430) along the axial direction of the composite roller (110), wherein D1=D3, and / or D2>D1.

8. The thermal composite device (10) according to claim 5, characterized in that: The width of the first protrusion (410) is D1, and the width D1 of the first protrusion (410) refers to the distance between two opposite side surfaces of the first protrusion (410) along the axial direction of the composite roller (110). The width of the second protrusion (420) is D2, and the width D2 of the second protrusion (420) refers to the distance between two opposite side surfaces of the second protrusion (420) extending along the axial direction of the composite roller (110). The width of the third protrusion (430) is D3, and the width D3 of the third protrusion (430) refers to the distance between two opposite side surfaces of the third protrusion (430) along the axial direction of the composite roller (110), wherein one of D1, D2 and D3 satisfies one of the following ranges: 2mm≤D1≤5mm, 4mm≤D2≤10mm, 2mm≤D3≤5mm.

9. The thermal composite device (10) according to any one of claims 1 to 8, characterized in that: The height of the protruding structure (400) is H, wherein 1 mm ≤ H ≤ 5 mm.

10. The thermal composite device (10) according to any one of claims 1 to 8, characterized in that: When both of the two composite rollers (110) are provided with the protruding structure (400), the first gap S1 is formed between the protruding structures (400) of the two composite rollers (110) along a direction perpendicular to the axis of the composite roller (110).

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