Thermal compounding and rolling equipment for pole piece

Abstract

The utility model provides a pole piece thermal compounding rolling device and a using method thereof, the pole piece thermal compounding rolling device comprises two diaphragm feeding mechanisms, a pole piece feeding mechanism and a thermal compounding rolling mechanism, the two diaphragm feeding mechanisms are used for conveying an upper diaphragm and a lower diaphragm to the thermal compounding rolling mechanism, and the two diaphragm feeding mechanisms are used for conveying the upper diaphragm and the lower diaphragm to the thermal compounding rolling mechanism. The pole piece feeding mechanism is used for conveying a battery pole piece to the thermal compounding rolling mechanism, the battery pole piece is located between the upper diaphragm and the lower diaphragm, the pole piece feeding mechanism comprises a supporting part extending in the first direction, and the thermal compounding rolling mechanism is arranged at one end of the supporting part in the first direction; the supporting part is provided with at least two grabbing assemblies, the grabbing assemblies are used for grabbing the battery pole pieces located on the supporting part, and the grabbing assemblies can be close to or away from the thermal compounding rolling mechanism in the first direction. According to the utility model, the non-entering part of the battery pole piece can be positioned after the battery pole piece partially enters the thermal compounding rolling mechanism, so that the relative displacement between the battery pole piece and the diaphragm can be effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an electrode hot composite rolling equipment. Background Technology

[0002] In battery manufacturing, the thermal bonding and rolling of battery electrodes and separators is a critical process affecting battery performance. Current technology typically uses a negative pressure suction plate to feed the battery electrodes to the rolling mechanism. Normally, after the end of the battery electrode enters the rolling mechanism, the negative pressure suction plate ceases to act on the electrode. However, since the battery electrode has a certain length in the direction of entry into the rolling mechanism, and some electrode structures lack restraint, the electrode is susceptible to relative displacement or localized wrinkles between the electrode and separator during high-temperature rolling due to thermal stress and mechanical vibration, affecting product quality. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an electrode hot composite rolling equipment, which can keep the part that has not entered the hot composite rolling mechanism in position after the battery electrode part enters the hot composite rolling mechanism, thereby effectively avoiding relative displacement between the battery electrode and the separator, and ensuring the processing quality of the battery electrode and the separator.

[0004] The embodiments of this utility model are achieved through the following technical solutions:

[0005] A hot-composite pressing device for electrodes includes two separator feeding mechanisms, an electrode feeding mechanism, and a hot-composite pressing mechanism. The two separator feeding mechanisms are used to convey an upper separator and a lower separator to the hot-composite pressing mechanism. The electrode feeding mechanism is used to convey battery electrodes to the hot-composite pressing mechanism. The battery electrodes are located between the upper separator and the lower separator. The movement paths of the battery electrodes, the upper separator, and the lower separator on the hot-composite pressing mechanism are consistent. The electrode feeding mechanism includes a support portion extending along a first direction. The hot-composite pressing mechanism is located at one end of the support portion along the first direction. At least two gripping components are disposed on the support portion. The gripping components are used to grip the battery electrodes on the support portion and are movable relative to the support portion along the first direction to approach or move away from the hot-composite pressing mechanism. Thus, during the process of the battery electrode entering the hot composite rolling mechanism, the electrode feeding mechanism can limit and fix the area of ​​the battery electrode that has not entered the hot composite rolling mechanism for a long time, thereby effectively preventing relative displacement or local wrinkles between the battery electrode and the separator, and ensuring the processing quality.

[0006] According to a preferred embodiment, the support includes a linear module and a support panel arranged longitudinally at intervals, the support panel being located above the linear module and used to support the battery electrode; the linear module is equipped with at least two movers corresponding to at least two gripping components, and the gripping components are mounted on the corresponding movers.

[0007] According to a preferred embodiment, the gripping assembly includes a connecting plate mounted on the mover, the connecting plate having two gripping parts, and a support panel located between the two gripping parts, the gripping parts being used to grip the battery electrode sheet located on the support panel.

[0008] According to a preferred embodiment, the gripping part includes a first driving member, an adapter plate, and a gripper disposed on the connecting plate. The gripper is mounted on the adapter plate. The first driving member is used to drive the adapter plate to move closer to or away from the battery electrode on the support panel along a second direction. The first direction, the second direction, and the longitudinal direction are perpendicular to each other.

[0009] According to a preferred embodiment, a plurality of feeding rollers are mounted on the side of the support panel away from the linear module, and the plurality of feeding rollers are spaced apart along a first direction.

[0010] According to a preferred embodiment, the hot composite rolling mechanism includes a hot roller section and a cold roller section arranged sequentially along the battery electrode conveying direction. The electrode to be pressed, which is composed of the battery electrode, the upper separator, and the lower separator, passes through the hot roller section and the cold roller section in sequence. The inlet end of the hot roller section is provided with a closing roller section for pre-pressing the electrode to be pressed.

[0011] According to a preferred embodiment, the roller merging section includes a first fixed roller and a first movable roller arranged in parallel. The first movable roller can approach or move away from the first fixed roller, and the electrode sheet to be pressed is located between the first fixed roller and the first movable roller. The gap between the first fixed roller and the first movable roller is defined as a first pre-pressing gap. The roller merging section also includes a guide plate assembly disposed downstream of the first pre-pressing gap. The guide plate assembly includes two guide plates arranged opposite to each other. The gap between the two guide plates is defined as a second pre-pressing gap. The width of the portion of the second pre-pressing gap near the first pre-pressing gap gradually decreases in the conveying direction of the electrode sheet to be pressed. The electrode sheet to be pressed passes through the first pre-pressing gap and the second pre-pressing gap in sequence.

[0012] According to a preferred embodiment, the roller section further includes a second fixed roller and a second moving roller arranged in parallel. The second fixed roller is arranged in parallel with the first fixed roller, and the second moving roller can move closer to or further away from the second fixed roller. The electrode sheet to be pressed is located between the second fixed roller and the second moving roller. The gap between the second fixed roller and the second moving roller is defined as a third pre-pressing gap, and the electrode sheet to be pressed passes through the first pre-pressing gap, the second pre-pressing gap and the third pre-pressing gap in sequence.

[0013] According to a preferred embodiment, the hot roller section includes a lower roller frame and an upper roller frame, the upper roller frame being located above the lower roller frame and slidably connected to the lower roller frame; an upper roller adjusting frame is mounted on the lower roller frame, and a third driving member for driving the upper roller frame to move longitudinally is mounted on the upper roller frame; a first upper roller is rotatably mounted on the upper roller frame, and a first lower roller is rotatably mounted on the lower roller frame; a lower adjusting plate is mounted on the lower roller frame, and an upper adjusting plate is mounted on the upper roller frame; a third adjusting block is slidably mounted on the lower adjusting plate; a first adjusting slope is disposed on the third adjusting block; a second adjusting slope adapted to the first adjusting slope is disposed on one side of the upper adjusting plate facing the third adjusting block; the first adjusting slope acts on the second adjusting slope to adjust the height of the upper roller frame in the longitudinal direction.

[0014] According to a preferred embodiment, the first fixed roller and the second fixed roller are at the same height in the longitudinal direction. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A three-dimensional structural schematic diagram of the electrode hot composite roller pressing equipment provided in the embodiments of this utility model;

[0017] Figure 2 A three-dimensional structural schematic diagram of the electrode feeding mechanism provided in an embodiment of this utility model;

[0018] Figure 3 A three-dimensional structural diagram of the gripping component provided in an embodiment of this utility model;

[0019] Figure 4 A schematic diagram of the assembly structure of the second driving member and the gripper provided in an embodiment of this utility model;

[0020] Figure 5A three-dimensional structural schematic diagram of the diaphragm feeding mechanism provided in an embodiment of this utility model;

[0021] Figure 6 A front view schematic diagram of the diaphragm feeding mechanism provided in an embodiment of this utility model;

[0022] Figure 7 A three-dimensional structural schematic diagram of the thermal composite roller pressing mechanism provided in an embodiment of this utility model;

[0023] Figure 8 A three-dimensional structural schematic diagram of the roller assembly provided in an embodiment of this utility model;

[0024] Figure 9 This is a front view structural diagram of the roller assembly provided in an embodiment of the present utility model;

[0025] Figure 10 for Figure 9 Schematic diagram of the cross-sectional structure at section AA;

[0026] Figure 11 for Figure 10 A magnified view of the structure at point B in the middle;

[0027] Figure 12 A three-dimensional structural schematic diagram of the hot roller section provided in an embodiment of this utility model;

[0028] Figure 13 for Figure 12 A magnified view of the structure at point C;

[0029] Figure 14 This is a three-dimensional structural diagram of the cold roller section provided in an embodiment of the present utility model.

[0030] Icons: 1. Diaphragm feeding mechanism; 10. Electrode to be pressed; 11. Upper diaphragm; 12. Lower diaphragm; 13. Longitudinal plate; 14. Unwinding roller; 15. Tension swing roller; 16. Iron removal assembly; 17. Through roller; 2. Electrode feeding mechanism; 21. Support part; 211. Linear module; 2111. Mover; 212. Support panel; 2121. Feeding roller; 22. Gripping assembly; 221. Connecting plate; 222. Gripping part; 2221. First driving component; 2222. Adapter plate; 2223. Second driving component; 2224. Gripper; 22240. Clamping surface; 22241. Connecting block; 22242. Extension plate; 3. Hot composite rolling mechanism; 30. Closing roller part; 300a. First pre-compression gap; 300b. Second pre-compression gap; 300b1. First section; 30 0b2, Second section; 301, First fixed roller; 302, First moving roller; 303, First mounting plate; 3031, First adjusting block; 3032, Second adjusting block; 304, Second fixed roller; 305, Second moving roller; 31, Hot roller section; 311, Lower roller frame; 3111, Guide column; 3112, Lower adjusting plate; 3113, Upper adjusting plate; 31130, Second adjusting slope; 3114, Third adjusting block; 31140, First adjusting slope; 3115, Adjusting screw; 3116, Shaft seat; 312, Upper roller frame; 313, Upper roller adjusting frame; 314, First upper roller; 315, First lower roller; 316, Support plate; 32, Cold roller section; 33, Frame; 34, Guide plate assembly; 341, Guide plate; a, Battery electrode; X, First direction; Y, Second direction. Detailed Implementation

[0031] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0032] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0034] Please refer to Figures 1 to 14A hot-composite rolling device for electrodes includes two separator feeding mechanisms 1, an electrode feeding mechanism 2, and a hot-composite rolling mechanism 3. The two separator feeding mechanisms 1 are used to transport an upper separator 11 and a lower separator 12 to the hot-composite rolling mechanism 3. The electrode feeding mechanism 2 is used to transport a battery electrode a to the hot-composite rolling mechanism 3. The battery electrode a is located between the upper separator 11 and the lower separator 12. The movement paths of the battery electrode a, the upper separator 11, and the lower separator 12 on the hot-composite rolling mechanism 3 are consistent. The electrode feeding mechanism 2 includes a support portion 21 extending along a first direction X. The hot-composite rolling mechanism 3 is located at one end of the support portion 21 along the first direction X. At least two gripping components 22 are arranged on the support portion 21. The gripping components 22 are used to grip the battery electrode a on the support portion 21. The gripping components 22 can move relative to the support portion 21 along the first direction X to approach or move away from the hot-composite rolling mechanism 3. In this embodiment, the direction in which the battery electrode a is fed from the electrode feeding mechanism 2 to the thermal composite rolling mechanism 3 is the first direction X, specifically as follows: Figure 1 and Figure 2As shown, battery electrode a is placed on support 21, and its positioning on support 21 is achieved by gripping and fixing it using gripping component 22. For ease of description, the end of battery electrode a closer to the thermal compounding roller pressing mechanism 3 in the first direction X is defined as the front end, and the other end of battery electrode a in the first direction X is defined as the rear end. When there are two gripping components 22, the gripping component 22 closer to the thermal compounding roller pressing mechanism 3 grips battery electrode a closer to the front end, and the other gripping component 22 grips battery electrode a closer to the rear end. In use, the battery electrode a is first placed on the support 21 and positioned appropriately. Then, the positions of the two gripping components 22 are adjusted. As described above, the gripping component 22 near the front end of the thermal composite rolling mechanism 3 fixes the battery electrode a, while the other gripping component 22 near the rear end of the battery electrode a fixes it. Then, the two gripping components 22 move synchronously along the first direction X toward the thermal composite rolling mechanism 3, so that the front end of the battery electrode a enters the thermal composite rolling mechanism 3 and is rolled and fixed by the rollers of the thermal composite rolling mechanism 3. At this time, the gripping component 22 at the front end of the battery electrode a moves to its limit position and unlocks to release the front end area of ​​the battery electrode a. Meanwhile, the rear end area of ​​the battery electrode a is still gripped and fixed by the other gripping component 22 and moves synchronously along the first direction X toward the thermal composite rolling mechanism 3 until the gripping component 22 moves to its limit position (at this time, most of the area of ​​the battery electrode a in the first direction X has entered the thermal composite rolling mechanism 3 and completed processing). The gripping component 22 then unlocks to release the rear end area of ​​the battery electrode a. Thus, during the process of battery electrode a entering the hot composite rolling mechanism 3, the electrode feeding mechanism 2 can limit and fix the area of ​​battery electrode a that has not entered the hot composite rolling mechanism 3 for a long time, thereby effectively preventing relative displacement or local wrinkles between battery electrode a and separator, and ensuring processing quality.

[0035] like Figure 2 As shown, in this embodiment, preferably, there are five gripping components 22, including a first gripping component 22, a second gripping component 22, a third gripping component 22, a fourth gripping component 22, and a fifth gripping component 22 arranged sequentially. The first gripping component 22 is positioned close to the thermal composite rolling mechanism 3. In use, the first gripping component 22 grips the front end region of the battery electrode a, the fifth gripping component 22 grips the rear end region of the battery electrode a, and the second, third, and fourth gripping components 22 are evenly distributed between the first and fifth gripping components 22 and correspondingly grip and fix the battery electrode a in the first direction X. During use, the five gripping components 22 move synchronously to drive the battery electrode a towards the thermal composite rolling mechanism 3. As the battery electrode a continuously enters the thermal composite rolling mechanism 3, the first to fifth gripping components 22 unlock and release the battery electrode a one by one.

[0036] In another embodiment, the number of gripping components 22 can be adaptively set according to the length of the battery electrode a in the first direction X, and is not limited to five or two in this embodiment. It is understood that when the length of the battery electrode a in the first direction X is large, the number of gripping components 22 is large, and when the length of the battery electrode a in the first direction X is small, the number of gripping components 22 is small.

[0037] like Figure 2 As shown, the support portion 21 includes a linear module 211 and a support panel 212 arranged longitudinally at intervals. The support panel 212 is located above the linear module 211 and is used to support the battery electrode a. The linear module 211 is equipped with at least two movers 2111, each corresponding to at least two gripping components 22. The gripping components 22 are mounted on the corresponding movers 2111. In this embodiment, there are five movers 2111, which are mounted on the linear module 211 and driven by the linear module 211 to move in the first direction X or the opposite direction of the first direction X. Specifically, the movers 2111 are located between the linear module 211 and the support panel 212, that is, the gripping components 22 mounted on the movers 211 are located between the linear module 211 and the support panel 212, and the gripping components 22 are driven by the linear module 211 driving the movers 2111.

[0038] like Figure 3 As shown, the gripping assembly 22 includes a connecting plate 221 mounted on the mover 2111. Two gripping parts 222 are disposed on the connecting plate 221, and a support panel 212 is located between the two gripping parts 222. The gripping parts 222 are used to grip the battery electrode a on the support panel 212. In this embodiment, the first direction X, the second direction Y, and the longitudinal direction are mutually perpendicular. The connecting plate 221 extends along the second direction Y, and its middle portion is connected to the mover 2111. The end of the connecting plate 221 in the second direction Y extends out of the gap between the linear module 211 and the support panel 212, so that the gripping parts 222 mounted on the connecting plate 221 can grip the battery electrode a on the support panel 212.

[0039] Furthermore, the gripping unit 222 includes a first driving member 2221 disposed on the connecting plate 221, an adapter plate 2222, and a gripper 2224. The gripper 2224 is mounted on the adapter plate 2222, and the first driving member 2221 is used to drive the adapter plate 2222 to move closer to or away from the battery electrode a on the support panel 212 along the second direction Y. Figure 3As shown, the first driving member 2221 is a cylinder or an electric cylinder. The gripping plate is slidably mounted on the first driving member 2221. The free end of the piston rod of the first driving member 2221 is connected to the adapter plate 2222. The axial direction of the piston rod of the first driving member 2221 is parallel to the second direction Y. A vertical plate is mounted on the adapter plate 2222. A second driving member 2223 for driving the gripper 2224 is mounted on the vertical plate. The gripper 2224 is mounted on the adapter plate 2222 via the second driving member 2223 and the vertical plate. Optionally, the second driving member 2223 is a finger cylinder to drive the gripper 2224 to grip or unlock the battery electrode a. In this embodiment, the adapter plate 2222 can move along the second direction Y so that the two gripping parts 222 of the same gripping assembly 22 can be adjusted to their relative positions in the second direction Y, thereby enabling the electrode feeding mechanism 2 to adapt to the feeding of battery electrodes a of different specifications.

[0040] like Figure 4 As shown, the gripper 2224 includes an extension plate 22242 of the connecting block 22241 connected to it. The connecting block 22241 is assembled to the second driving member 2223, and the extension plate 22242 extends along the first direction X. In this embodiment, there are two grippers 2224, which are mirror-mounted on the finger cylinder and driven by it to open and close. In use, the battery electrode a is located between the two grippers 2224. The structural design of extending along the first direction X allows the grippers 2224 to clamp and fix the battery electrode a more effectively in the first direction X, improving the reliability of the grippers 2224 in fixing the battery electrode a.

[0041] The two extension plates 22242 have clamping surfaces 22240 on their adjacent sides, and these clamping surfaces 22240 are planar. It should be noted that when the grippers 2224 close to clamp the battery electrode a, the clamping surfaces 22240 of the two grippers 2224 are parallel. This ensures that the clamping surfaces 22240 have a larger contact area with the battery electrode a, improving reliability.

[0042] In another embodiment, the clamping surface 22240 is a cylindrical surface (not shown in the figure) protruding towards another extension plate 22242, and the generatrix of the cylindrical surface is parallel to the second direction Y. In this way, the manufacturing and assembly precision requirements of the gripper 2224 can be appropriately reduced. When the gripper 2224 closes to clamp the battery electrode a, the corresponding clamping surfaces 22240 of the two extension plates 22242 abut against each other.

[0043] like Figure 2As shown, a plurality of feeding rollers 2121 are mounted on the side of the support panel 212 away from the linear module 211, and the plurality of feeding rollers 2121 are spaced apart along the first direction X. In this embodiment, the axial direction of the feeding rollers 2121 is parallel to the second direction Y, and the feeding rollers 2121 are rotatably mounted on the support panel 212. The feeding rollers 2121 can reduce the friction between the battery electrode a and the support panel 212, and reduce the risk of damage to the battery electrode a during the feeding process.

[0044] Optionally, a support plane is provided between two adjacent feeding rollers 2121 on the support panel 212, and the feeding rollers 2121 are slightly higher than the support plane in the longitudinal direction. Optionally, the height difference between the highest point of the feeding rollers 2121 in the longitudinal direction and the support plane is 0.5mm-1mm.

[0045] like Figure 1 , Figure 5 and Figure 6 As shown, the diaphragm feeding mechanism 1 providing the upper diaphragm 11 and the lower diaphragm 12 is the same. Here, the diaphragm feeding mechanism 1 providing the upper diaphragm 11 is used as an example for explanation. The diaphragm feeding mechanism 1 includes a longitudinal plate 13. Along the diaphragm conveying path, an unwinding roller 14, a tension swing roller 15, and a dust removal and iron removal assembly 16 are sequentially arranged on the longitudinal plate 13. The unwinding roller 14 is used to assemble the diaphragm roll, the tension swing roller 15 is used to adjust the tension of the upper diaphragm 11, and the dust removal and iron removal assembly 16 is used to remove dust or iron filings adhering to the upper diaphragm 11 to ensure the diaphragm is clean. In this embodiment, there are at least two unwinding rollers 14. The longitudinal plate 13 is also equipped with a diaphragm splicing assembly for splicing the upper diaphragms 11 on the two unwinding rollers 14 to achieve uninterrupted production and ensure production efficiency.

[0046] In this embodiment, the tension swing roller 15, the dust removal and iron removal component 16, and the diaphragm belt connecting component can be any existing tension swing roller 15, dust removal and iron removal component 16, and diaphragm belt connecting component, which are existing technologies and will not be described in detail here.

[0047] Furthermore, at least one guide roller 17 is provided between the unwinding roller 14 and the tension swing roller 15, as well as between the tension swing roller 15 and the dust and iron removal equipment. The guide roller 17 is used to change the travel path of the upper diaphragm 11, and can be specifically set as needed, without limitation here.

[0048] like Figure 7As shown, the hot composite rolling mechanism 3 includes a hot roller section 31 and a cold roller section 32 arranged sequentially along the conveying direction of the battery electrode a. The electrode 10 to be pressed, composed of the battery electrode a, the upper separator 11, and the lower separator 12, passes sequentially through the hot roller section 31 and the cold roller section 32. A closing roller section 30 is arranged at the inlet end of the hot roller section 31 for pre-pressing the electrode 10 to be pressed. In this embodiment, the conveying direction of the battery electrode a is parallel to the first direction X. The battery electrode a and the upper and lower separators are partially fused together by the hot roller section 31 and then rapidly cooled and solidified by the cold roller section 32. After the pre-pressing of the battery electrode a and the upper and lower separators (i.e., the electrode 10 to be pressed) by the roller section 30, the state of the electrode 10 to be pressed can be stabilized so that it enters the hot roller section 31 with a stable structure. At the same time, the air between the separator and the battery electrode a can be eliminated by the pre-pressing method, which improves the adhesion between the separator and the battery electrode a. This allows the separator and the battery electrode a to enter the hot roller section 31 for rolling in a nearly parallel posture, reducing the wrap angle of the separator on the rollers of the hot roller section 31, avoiding premature heating of the separator, and helping to ensure the processing quality.

[0049] like Figures 8 to 11 As shown, the roller merging section 30 includes a first fixed roller 301 and a first moving roller 302 arranged in parallel. The first moving roller 302 can approach or move away from the first fixed roller 301. The electrode sheet 10 to be pressed is located between the first fixed roller 301 and the first moving roller 302. The gap between the first fixed roller 301 and the first moving roller 302 is defined as the first pre-pressing gap 300a. The roller merging section 30 also includes a guide plate assembly 34 disposed downstream of the first pre-pressing gap 300a. The guide plate assembly 34 includes two guide plates 341 arranged opposite to each other. The gap between the two guide plates 341 is defined as the second pre-pressing gap 300b. The width of the portion of the second pre-pressing gap 300b near the first pre-pressing gap 300a gradually decreases in the conveying direction of the electrode sheet 10 to be pressed. The electrode sheet 10 to be pressed passes through the first pre-pressing gap 300a and the second pre-pressing gap 300b in sequence. Figure 7 As shown, the hot composite roller pressing mechanism 3 also includes a frame 33, with the hot roller section 31 and the cold roller section 32 both disposed on the frame 33, and the combining roller section 30 mounted on the frame 33 or the hot roller section 31.

[0050] In this embodiment, preferably, the roller-closing section 30 is disposed on the hot roller section 31. Specifically, the roller-closing section 30 further includes two opposing first mounting plates 303, a first fixed roller 301 rotatably mounted between the two first mounting plates 303, a first adjusting block 3031 slidably mounted on the first mounting plate 303 along the longitudinal direction via a slide rail slider assembly, a first moving roller 302 rotatably mounted on the first adjusting block 3031, and a cylinder for driving the movement of the first adjusting block 3031 is assembled on the first mounting plate 303. In use, the electrode sheet 10 to be pressed is initially shaped through the first pre-pressing gap 300a to reduce the gap between the separator and the battery electrode sheet a, and then enters the second pre-pressing gap 300b from the larger end for further shaping.

[0051] like Figure 11 As shown, the second pre-compression gap 300b includes a first segment 300b1 and a second segment 300b2 that are interconnected. The first segment 300b1 is positioned close to the first pre-compression gap 300a, meaning that the width of the first segment 300b1 gradually decreases in the conveying direction of the electrode sheet 10 to be compressed. The width of the second segment 300b2 is less than or equal to the minimum width of the first segment 300b1. This arrangement facilitates the electrode sheet 10, after being shaped by the first pre-compression gap 300a, to smoothly pass through the first segment 300b1 and enter the second segment 300b2 for further shaping.

[0052] Furthermore, such as Figure 10 and Figure 11 As shown, the roller assembly 30 also includes a second fixed roller 304 and a second movable roller 305 arranged in parallel. The second fixed roller 304 is arranged parallel to the first fixed roller 301, and the second movable roller 305 can move closer to or further away from the second fixed roller 304. The electrode sheet 10 to be pressed is located between the second fixed roller 304 and the second movable roller 305. The gap between the second fixed roller 304 and the second movable roller 305 is defined as the third pre-pressing gap. The electrode sheet 10 to be pressed passes through the first pre-pressing gap 300a, the second pre-pressing gap 300b, and the third pre-pressing gap in sequence. In this embodiment, the second fixed roller 304 is rotatably mounted on the first mounting plate 303. A second adjusting block 3032 is slidably mounted on the first mounting plate 303 along the longitudinal direction via a slide rail slider assembly. The second movable roller 305 is rotatably mounted on the second adjusting block 3032. A cylinder for driving the movement of the second adjusting block 3032 is assembled on the first mounting plate 303. In this way, the adjustment of the third pre-pressing gap can be realized. In this embodiment, a motor is configured on the first mounting plate 303 to drive the second fixed roller 304 to rotate, so as to cooperate with the second moving roller 305 to drive the electrode sheet 10 to be pressed into the hot roller section 31.

[0053] Optionally, during the conveying of the electrode sheet 10 to be pressed, the second pre-pressing gap 300b is greater than or equal to the third pre-pressing gap.

[0054] Optionally, the first fixed roller 301 and the second fixed roller 304 are at the same height in the longitudinal direction, so that the electrode sheet 10 to be pressed travels horizontally.

[0055] like Figure 12 and Figure 13As shown, the hot roller section 31 includes a lower roller frame 311 and an upper roller frame 312. The upper roller frame 312 is located above the lower roller frame 311 and is slidably connected to the lower roller frame 311. An upper roller adjusting frame 313 is mounted on the lower roller frame 311, and a third driving member for driving the upper roller frame 312 to move longitudinally is mounted on the upper roller frame 313. A first upper roller 314 is rotatably mounted on the upper roller frame 312, and a first lower roller 315 is rotatably mounted on the lower roller frame 311. A lower adjusting plate 3 is mounted on the lower roller frame 311. 112. An upper adjusting plate 3113 is mounted on the upper roller frame 312. A third adjusting block 3114 is slidably mounted on the lower adjusting plate 3112. A first adjusting slope 31140 is provided on the third adjusting block 3114. A second adjusting slope 31130 adapted to the first adjusting slope 31140 is provided on one side of the upper adjusting plate 3113 facing the third adjusting block 3114. The first adjusting slope 31140 acts on the second adjusting slope 31130 to adjust the height of the upper roller frame 312 in the longitudinal direction.

[0056] In this embodiment, the lower roller frame 311 is equipped with a guide post 3111 extending longitudinally, and the upper roller frame 312 is provided with a guide hole (not shown in the figure) corresponding to the guide post 3111. The guide post 3111 is slidably embedded in the guide hole. The third driving component is a cylinder or an electric cylinder, which drives the upper roller frame 312 to move the first upper roller 314 longitudinally closer to or further away from the first lower roller 315, thereby adjusting the gap between the first upper roller 314 and the first lower roller 315. Based on this, the first adjusting inclined surface 31140 cooperates with the second adjusting inclined surface 31130 to fine-tune the gap size between the first upper roller 314 and the first lower roller 315 to achieve the corresponding processing accuracy.

[0057] In this embodiment, a bearing seat 3116 is mounted on the lower roller frame 311, and an adjusting screw 3115 is rotatably mounted on the bearing seat 3116. The adjusting screw 3115 passes through the third adjusting block 3114 and is threadedly connected to it.

[0058] Optionally, the first mounting plate 303 is detachably mounted to the upper roller adjusting frame 313 by screws or bolts.

[0059] like Figure 12 As shown, a support plate 316 is mounted on the upper roller adjusting frame 313 or the lower roller frame 311. The support plate 316 is used to support the electrode sheet 10 to be pressed in the longitudinal direction.

[0060] In this embodiment, optionally, the cold roller section 32 and the hot roller section 31 have the same structure, such as... Figure 14 As shown, it will not be elaborated further here.

[0061] like Figure 7As shown, the lower roller frame 311 is slidably mounted on the frame 33 via a slide rail slider assembly, and is driven by a screw mounted on the frame 33 to adjust the spatial position of the hot roller section 31 or the cold roller section 32 on the frame 33.

[0062] In this embodiment, a method for using an electrode hot composite rolling mill is also provided, which is applied to the aforementioned electrode hot composite rolling mill, and includes the following steps:

[0063] S1: Unwind the upper diaphragm 11 and the lower diaphragm 12 and feed them into the hot composite roller pressing mechanism 3;

[0064] S2: The battery electrode a is placed in the support 21, and the battery electrode a is gripped and positioned by at least two gripping components 22 provided in the support 21. The at least two gripping components 22 are evenly distributed at equal intervals in the area of ​​the battery electrode a along the first direction X.

[0065] S3: At least two gripping components 22 move synchronously toward the thermal composite rolling mechanism 3 to transfer the battery electrode a. As the battery electrode a gradually enters the thermal composite rolling mechanism 3, at least two gripping components 22, starting from the gripping component 22 closest to the thermal composite rolling mechanism 3, sequentially release the gripping and positioning of the battery electrode a.

[0066] Thus, during the process of battery electrode a entering the hot composite rolling mechanism 3, the electrode feeding mechanism 2 can limit and fix the area of ​​battery electrode a that has not entered the hot composite rolling mechanism 3 for a long time, thereby effectively preventing relative displacement or local wrinkles between battery electrode a and separator, and ensuring processing quality.

[0067] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A pole piece hot compaction roll apparatus characterized by, The application relates to a battery electrode piece feeding device, which comprises two diaphragm feeding mechanisms, an electrode piece feeding mechanism and a hot-combining roller pressing mechanism, wherein the two diaphragm feeding mechanisms are used for feeding upper and lower diaphragms to the hot-combining roller pressing mechanism, the electrode piece feeding mechanism is used for feeding a battery electrode piece to the hot-combining roller pressing mechanism, the battery electrode piece is between the upper and lower diaphragms, and the movement paths of the battery electrode piece, the upper diaphragm and the lower diaphragm on the hot-combining roller pressing mechanism are consistent. The electrode piece feeding mechanism comprises a support part extending along a first direction, and the hot-combining roller pressing mechanism is arranged at one end of the support part along the first direction. At least two grabbing components are arranged on the support part, the grabbing components are used for grabbing the battery electrode piece on the support part, and the grabbing components can move relative to the support part along the first direction to approach or move away from the hot-combining roller pressing mechanism.

2. The pole piece hot compaction roll apparatus of claim 1, wherein The support part comprises a linear module and a support panel arranged at intervals along a longitudinal direction, the support panel is above the linear module, and the support panel is used for carrying the battery electrode piece. At least two movers corresponding to the at least two grabbing components are arranged on the linear module, and the grabbing components are mounted on the corresponding movers.

3. The pole piece hot compaction roll apparatus of claim 2, wherein The grabbing component comprises a connecting plate mounted on the mover, two grabbing parts are arranged on the connecting plate, the support panel is between the two grabbing parts, and the grabbing parts are used for grabbing the battery electrode piece on the support panel.

4. The pole piece hot compaction roll apparatus of claim 3, wherein The grabbing part comprises a first driving element arranged on the connecting plate, an adapter plate and a clamping jaw, the clamping jaw is mounted on the adapter plate, and the first driving element is used for driving the adapter plate to approach or move away from the battery electrode piece on the support panel along a second direction. The first direction, the second direction and the longitudinal direction are perpendicular to each other in pairs.

5. The pole piece hot compaction roll apparatus of claim 2 wherein, A plurality of feeding rollers are arranged on one side of the support panel away from the linear module and at intervals along the first direction.

6. The pole piece hot compaction roll apparatus of claim 1 wherein, The hot-combining roller pressing mechanism comprises a hot roller part and a cold roller part arranged in sequence along a battery electrode piece conveying direction, and a to-be-pressed electrode piece formed by the battery electrode piece, the upper diaphragm and the lower diaphragm sequentially passes through the hot roller part and the cold roller part. An assembling roller part is arranged at an inlet end of the hot roller part and used for pre-pressing the to-be-pressed electrode piece.

7. The pole piece hot compaction roll apparatus of claim 6 wherein, The assembling roller part comprises a first fixed roller and a first movable roller arranged in parallel, the first movable roller can approach or move away from the first fixed roller, and the to-be-pressed electrode piece is between the first fixed roller and the first movable roller. The gap between the first fixed roller and the first movable roller is defined as a first pre-pressing gap. The assembling roller part further comprises a guide plate assembly arranged on the downstream side of the first pre-pressing gap, the guide plate assembly comprises two guide plates arranged oppositely, the gap between the two guide plates is defined as a second pre-pressing gap, and the width of the second pre-pressing gap close to the first pre-pressing gap gradually decreases in the conveying direction of the to-be-pressed electrode piece. The to-be-pressed electrode piece sequentially passes through the first pre-pressing gap and the second pre-pressing gap.

8. The pole piece hot compaction roll apparatus of claim 7 wherein, The combined roller part further comprises a second fixed roller and a second movable roller arranged in parallel, the second fixed roller is arranged in parallel with the first fixed roller, and the second movable roller can move close to or away from the second fixed roller, and the to-be-pressed pole piece is arranged between the second fixed roller and the second movable roller. The gap between the second fixed roller and the second movable roller is defined as a third pre-pressing gap, and the to-be-pressed pole piece sequentially passes through the first pre-pressing gap, the second pre-pressing gap and the third pre-pressing gap.

9. The pole piece hot compaction roll apparatus of claim 8 wherein, The hot roller part comprises a lower roller frame and an upper roller frame, the upper roller frame is arranged above the lower roller frame, and the upper roller frame is in sliding connection with the lower roller frame. The lower roller frame is provided with an upper roller adjusting frame, the upper roller adjusting frame is provided with a third driving member for driving the upper roller frame to move longitudinally, the upper roller frame is rotatably provided with a first upper roller, and the lower roller frame is rotatably provided with a first lower roller. The lower roller frame is provided with a lower adjusting plate, the upper roller frame is provided with an upper adjusting plate, the lower adjusting plate is slidably provided with a third adjusting block, the third adjusting block is provided with a first adjusting inclined surface, and the side surface of the upper adjusting plate facing the third adjusting block is provided with a second adjusting inclined surface matched with the first adjusting inclined surface, and the first adjusting inclined surface acts on the second adjusting inclined surface to adjust the height of the upper roller frame in the longitudinal direction.

10. The pole piece hot compaction roll apparatus of claim 8 wherein, The first fixed roller and the second fixed roller are equal in height in the longitudinal direction.

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