Pole piece thermal compounding rolling equipment and use method thereof

Abstract

The invention provides pole piece thermal compounding rolling equipment and a using method thereof.The pole piece thermal compounding rolling equipment 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 invention, 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 relative displacement between the battery pole piece and a diaphragm can be effectively avoided.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a pole piece hot composite rolling device and a use method thereof. Background Art

[0002] In the battery production process, hot composite rolling of battery pole pieces and diaphragms is a key process that affects battery performance. In the prior art, a negative pressure suction plate is usually used to adsorb the battery pole pieces and feed them to the rolling mechanism. Normally, after the end of the battery pole piece enters the rolling mechanism, the negative pressure suction plate no longer acts on the battery pole piece. However, the battery pole piece has a certain length in the direction of entering the rolling mechanism. In the case that some battery pole piece structures lack limiters, the battery pole piece is easily affected by thermal stress and mechanical vibration during the high-temperature rolling process, resulting in relative displacement or local wrinkles between the battery pole piece and the diaphragm, which affects product quality. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a pole piece hot composite rolling equipment, which can keep the non-entered part of the battery pole piece in position after the part enters the hot composite rolling mechanism, thereby effectively avoiding relative displacement between the battery pole piece and the diaphragm, and ensuring the processing quality of the battery pole piece and the diaphragm.

[0004] Another object of the present invention is to provide a method for using a pole piece hot composite rolling device, which can effectively prevent relative displacement or local wrinkles between the battery pole piece and the diaphragm, thereby ensuring the processing quality.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] A pole piece hot composite rolling device comprises two diaphragm feeding mechanisms, a pole piece feeding mechanism and a hot composite rolling mechanism, wherein the two diaphragm feeding mechanisms are used to convey an upper diaphragm and a lower diaphragm to the hot composite rolling mechanism, and the pole piece feeding mechanism is used to convey a battery pole piece to the hot composite rolling mechanism, wherein the battery pole piece is located between an upper diaphragm and a lower diaphragm, and the movement paths of the battery pole piece, the upper diaphragm and the lower diaphragm on the hot composite rolling mechanism are consistent, wherein: the pole piece feeding mechanism comprises a support portion extending along a first direction, and the hot composite rolling mechanism is arranged at one end of the support portion along the first direction; at least two gripping assemblies are arranged on the support portion, and the gripping assemblies are used to grip the battery pole piece on the support portion, and the gripping assemblies can move relative to the support portion along the first direction to approach or move away from the hot composite rolling mechanism. In this way, during the process of the battery pole piece entering the hot composite rolling mechanism for processing, the pole piece feeding mechanism can limit and fix the area of ​​the battery pole piece that has not entered the hot composite rolling mechanism for a long time, thereby effectively preventing relative displacement or local wrinkles between the battery pole piece and the diaphragm, and ensuring the processing quality.

[0007] According to a preferred embodiment, the support portion includes a linear module and a support panel arranged along the longitudinal interval, the support panel is above the linear module, and the support panel is used to support the battery electrode; the linear module is equipped with at least two movers corresponding to at least two grasping components, and the grasping components are installed on the corresponding movers.

[0008] According to a preferred embodiment, the grabbing assembly includes a connecting plate mounted on the mover, two grabbing parts are arranged on the connecting plate, the supporting panel is located between the two grabbing parts, and the grabbing parts are used to grab the battery pole pieces on the supporting panel.

[0009] According to a preferred embodiment, the grasping portion includes a first driving member, an adapter plate and a clamping claw arranged on the connecting plate, the clamping claw is installed on the adapter plate, and the first driving member is used to drive the adapter plate to approach or move away from the battery pole piece on the supporting panel along a second direction; the first direction, the second direction and the longitudinal direction are perpendicular to each other.

[0010] According to a preferred embodiment, a side of the support panel away from the linear module is equipped with a plurality of feed rollers, and the plurality of feed rollers are spaced apart along the first direction.

[0011] According to a preferred embodiment, the hot composite rolling mechanism includes a hot roller portion and a cold roller portion which are arranged in sequence along the conveying direction of the battery electrode sheet, and the electrode sheet to be pressed consisting of the battery electrode sheet, the upper diaphragm and the lower diaphragm passes through the hot roller portion and the cold roller portion in sequence; the inlet end of the hot roller portion is provided with a closing roller portion for pre-pressing the electrode sheet to be pressed.

[0012] According to a preferred embodiment, the roller-closing 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 the first pre-pressing gap; the roller-closing section also includes a guide plate assembly arranged on the downstream side of the first pre-pressing gap, the guide plate assembly includes two guide plates arranged opposite to each other, and the gap between the two guide plates is defined as the 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 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.

[0013] According to a preferred embodiment, the roller-closing portion also includes 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, the second movable roller can approach or move away from the second fixed roller, and the electrode sheet to be pressed is located 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 the 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.

[0014] According to a preferred embodiment, the hot roller portion includes a lower roller frame and an upper roller frame, the upper roller frame is located above the lower roller frame, and the upper roller frame is slidably connected to the lower roller frame; the lower roller frame is equipped with an upper roller adjustment frame, and the upper roller adjustment frame is equipped with a third driving member for driving the upper roller frame to move in the longitudinal direction, the upper roller frame is rotatably installed with a first upper roller, and the lower roller frame is rotatably installed with a first lower roller; the lower roller frame is equipped with a lower adjusting plate, the upper roller frame is equipped with an upper adjusting plate, and the lower adjusting plate is slidably installed with a third adjusting block, the third adjusting block is provided with a first adjusting inclined surface, and a side surface of the upper adjusting plate facing the third adjusting block is provided with a second adjusting inclined surface adapted to 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.

[0015] A method for using a pole piece hot composite rolling device, which is applied to the aforementioned pole piece hot composite rolling device, comprises the following steps: unwinding the upper diaphragm and the lower diaphragm and feeding them into a hot composite rolling mechanism; placing the battery pole piece on a support portion, and grasping and positioning the battery pole piece by at least two grasping assemblies arranged on the support portion, wherein the at least two grasping assemblies are evenly spaced within the region of the battery pole piece along a first direction; at least two grasping assemblies synchronously move toward the hot composite rolling mechanism to transport the battery pole piece, and as the battery pole piece gradually enters the hot composite rolling mechanism, at least two grasping assemblies, starting from the grasping assembly closest to the hot composite rolling mechanism, sequentially release the grasping and positioning of the battery pole piece. In the process of the battery pole piece entering the hot composite rolling mechanism for processing, the pole piece feeding mechanism can limit and fix the area of ​​the battery pole piece that has not entered the hot composite rolling mechanism for a long time, thereby effectively preventing the relative displacement or local wrinkles between the battery pole piece and the diaphragm, and ensuring the processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a pole piece hot composite rolling press device provided in an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the three-dimensional structure of a pole piece feeding mechanism provided in an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of the three-dimensional structure of a grabbing assembly provided in an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of the assembly structure of the second driving member and the clamping jaws provided in an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of the three-dimensional structure of a diaphragm feeding mechanism provided in an embodiment of the present invention;

[0022] Figure 6 A schematic diagram of the front view of the diaphragm feeding mechanism provided in an embodiment of the present invention;

[0023] Figure 7 A schematic diagram of the three-dimensional structure of a hot composite rolling mechanism provided in an embodiment of the present invention;

[0024] Figure 8A schematic diagram of the three-dimensional structure of a roller closing portion provided in an embodiment of the present invention;

[0025] Fig. 9 A schematic front view of the structure of a roller closing portion provided in an embodiment of the present invention;

[0026] Fig.10 for Fig. 9 Schematic diagram of the cross-sectional structure of the AA section;

[0027] Fig.11 for Fig.10 A partial enlarged schematic diagram of the structure at B in the middle;

[0028] Fig.12 A schematic diagram of the three-dimensional structure of a hot roller portion provided in an embodiment of the present invention;

[0029] Fig.13 for Fig.12 A partial enlarged schematic diagram of the structure at C in the middle;

[0030] Fig.14 A schematic diagram of the three-dimensional structure of a cold roller portion provided in an embodiment of the present invention.

[0031] Icons: 1. Diaphragm feeding mechanism; 10. Pole piece to be pressed; 11. Upper diaphragm; 12. Lower diaphragm; 13. Longitudinal plate; 14. Unwinding roller; 15. Tension swing roller; 16. Iron removal assembly; 17. Over roller; 2. Pole piece feeding mechanism; 21. Support part; 211. Linear module; 2111. Mover; 212. Support panel; 2121. Feeding roller; 22. Grasping assembly; 221. Connecting plate; 222. Grasping part; 2221. First driving member; 2222. Adapter plate; 2223. Second driving member; 2224. Clamping claw; 22240. Clamping surface; 22241. Connecting block; 22242. Extension plate; 3. Hot composite rolling mechanism; 30. Rolling part; 300a. First pre-pressing gap; 300b. Second pre-pressing gap; 300b1. First section; 30 0b2, second section; 301, first fixed roller; 302, first movable roller; 303, first mounting plate; 3031, first adjusting block; 3032, second adjusting block; 304, second fixed roller; 305, second movable roller; 31, hot roller section; 311, lower roller frame; 3111, guide column; 3112, lower adjusting plate; 3113, upper adjusting plate; 31130, second adjusting inclined plane; 3114, third adjusting block; 31140, first adjusting inclined plane; 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 DESCRIPTION

[0032] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0035] Please refer to Figures 1 to 14 , a pole piece hot composite rolling device, comprising two diaphragm feeding mechanisms 1, a pole piece feeding mechanism 2 and a hot composite rolling mechanism 3, the two diaphragm feeding mechanisms 1 are used to convey the upper diaphragm 11 and the lower diaphragm 12 to the hot composite rolling mechanism 3, the pole piece feeding mechanism 2 is used to convey the battery pole piece a to the hot composite rolling mechanism 3, the battery pole piece a is between the upper diaphragm 11 and the lower diaphragm 12, and the movement paths of the battery pole piece a, the upper diaphragm 11 and the lower diaphragm 12 on the hot composite rolling mechanism 3 are consistent, wherein: the pole piece feeding mechanism 2 includes a support portion 21 extending along a first direction X, and the hot composite rolling mechanism 3 is arranged at one end of the support portion 21 along the first direction X; at least two grasping components 22 are arranged on the support portion 21, the grasping components 22 are used to grasp the battery pole piece a on the support portion 21, and the grasping 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 transported to the hot composite rolling mechanism 3 through the electrode feeding mechanism 2 is the first direction X. Figure 1 and Figure 2As shown, the battery electrode sheet a is placed on the support part 21, and the battery electrode sheet a is positioned on the support part 21 by being grasped and fixed by the grasping assembly 22. For the convenience of description, the end of the battery electrode sheet a close to the hot composite rolling mechanism 3 in the first direction X is defined as the front end, and the other end of the battery electrode sheet a in the first direction X is defined as the rear end. When the number of the grasping assemblies 22 is two, the grasping position of the grasping assembly 22 close to the hot composite rolling mechanism 3 for the battery electrode sheet a is close to the front end, and the grasping position of the other grasping assembly 22 for the battery electrode sheet a is close to the rear end. When in use, first place the battery electrode sheet a on the support portion 21 and in an appropriate position, then adjust the positions of the two grasping components 22, in the aforementioned form, that is, the grasping component 22 close to the hot composite rolling mechanism 3 is close to the front end to fix the battery electrode sheet a, and the other grasping component 22 is close to the rear end of the battery electrode sheet a to fix the battery electrode sheet a, then the two grasping components 22 are synchronously moved along the first direction X toward the hot composite rolling mechanism 3 so that the front end of the battery electrode sheet a enters the hot composite rolling mechanism 3 and is rolled and fixed by the rollers of the hot composite rolling mechanism 3, at this time, the grasping component 22 at the front end of the battery electrode sheet a moves to the extreme position and is unlocked to release the front end area of ​​the battery electrode sheet a, while the rear end area of ​​the battery electrode sheet a is still grasped and fixed by another grasping component 22 and synchronously moves along the first direction X toward the hot composite rolling mechanism 3, until the grasping component 22 moves to the extreme position (at this time, most of the area of ​​the battery electrode sheet a in the first direction X has entered the hot composite rolling mechanism 3 to complete the processing), and the grasping component 22 is unlocked to release the rear end area of ​​the battery electrode sheet a. In this way, during the process of the battery pole piece a entering the hot composite rolling mechanism 3 for processing, the pole piece feeding mechanism 2 can limit and fix the area of ​​the battery pole piece a that has not entered the hot composite rolling mechanism 3 for a long time, thereby effectively preventing relative displacement or local wrinkles between the battery pole piece a and the diaphragm, thereby ensuring the processing quality.

[0036] 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 which are sequentially arranged, wherein the first gripping component 22 is arranged close to the hot composite rolling mechanism 3. When in use, the first gripping component 22 grabs the front end area of ​​the battery electrode sheet a, the fifth gripping component 22 grabs the rear end area of ​​the battery electrode sheet a, the second gripping component 22, the third gripping component 22 and the fourth gripping component 22 are evenly distributed between the first gripping component 22 and the fifth gripping component 22 and correspondingly grab and fix each area of ​​the battery electrode sheet a in the first direction X. When in use, the five gripping components 22 move synchronously to drive the battery electrode sheet a to move toward the hot composite rolling mechanism 3. As the battery electrode sheet a continuously enters the hot composite rolling mechanism 3, the first gripping component 22 to the fifth gripping component 22 are unlocked and released one by one.

[0037] In other embodiments, the number of the 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 the present embodiment. It can be understood that when the length of the battery electrode a in the first direction X is large, the number of the gripping components 22 is large, and when the length of the battery electrode a in the first direction X is small, the number of the gripping components 22 is small.

[0038] like Figure 2 As shown, the support portion 21 includes a linear module 211 and a support panel 212 arranged at intervals in the longitudinal direction. The support panel 212 is located above the linear module 211, and the support panel 212 is used to carry the battery electrode a; the linear module 211 is equipped with at least two movers 2111 corresponding to at least two grab assemblies 22, and the grab assemblies 22 are installed on the corresponding movers 2111. In this embodiment, there are five movers 2111, which are assembled on the linear module 211 and driven by the linear module 211 to move along 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 grab assemblies 22 assembled on the movers 2111 are located between the linear module 211 and the support panel 212, and the grab assemblies 22 are driven by the linear module 211 driving the movers 2111.

[0039] like Figure 3 As shown, the grab assembly 22 includes a connecting plate 221 mounted on the mover 2111, and two grabbing parts 222 are arranged on the connecting plate 221. The support panel 212 is located between the two grabbing parts 222, and the grabbing part 222 is used to grab the battery pole piece a on the support panel 212. In this embodiment, the first direction X, the second direction Y and the longitudinal direction are perpendicular to each other. The connecting plate 221 is extended along the second direction Y, the middle part of the connecting plate 221 is connected to the mover 2111, and 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 grabbing part 222 assembled on the connecting plate 221 can grab the battery pole piece a on the support panel 212.

[0040] Furthermore, the gripping portion 222 includes a first driving member 2221, an adapter plate 2222 and a clamp 2224 provided on the connecting plate 221, the clamp 2224 is installed on the adapter plate 2222, and the first driving member 2221 is used to drive the adapter plate 2222 to approach or move away from the battery electrode a on the supporting panel 212 along the second direction Y. Figure 3As shown, the first driving member 2221 is a cylinder or an electric cylinder, the grab plate is slidably assembled 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, and the axial direction of the piston rod of the first driving member 2221 is parallel to the second direction Y. The adapter plate 2222 is equipped with a vertical plate, and the vertical plate is equipped with a second driving member 2223 for driving the clamping claw 2224, and the clamping claw 2224 is assembled on the adapter plate 2222 through the second driving member 2223 and the vertical plate. Optionally, the second driving member 2223 is a finger cylinder to drive the clamping claw 2224 to clamp or unlock the battery electrode a. In this embodiment, the adapter plate 2222 can move along the second direction Y, so that the two grasping parts 222 of the same grasping assembly 2 can adjust the relative position in the second direction Y, so that the electrode feeding mechanism 2 can adapt to the feeding of battery electrodes a of different specifications.

[0041] like Figure 4 As shown, the clamping jaw 2224 includes an extension plate 22242 of a connecting block 22241 connected to each other, the connecting block 22241 is assembled to the second driving member 2223, and the extension plate 22242 is extended along the first direction X. In this embodiment, there are two clamping jaws 2224, which are mirror-imaged on the finger cylinder and driven by the finger cylinder to open and close. When in use, the battery electrode a is located between the two clamping jaws 2224. The structural design extending along the first direction X enables the clamping jaw 2224 to clamp and fix the battery electrode a more in the first direction X, thereby improving the reliability of the clamping jaw 2224 fixing the battery electrode a.

[0042] The two extension plates 22242 are provided with a clamping surface 22240 on one side close to each other, and the clamping surface 22240 is a plane. It should be noted that when the clamping jaws 2224 are closed to clamp the battery pole piece a, the clamping surfaces 22240 of the two clamping jaws 2224 are parallel. This ensures that the clamping surface 22240 has a larger contact area with the battery pole piece a, thereby improving reliability.

[0043] In another embodiment, the clamping surface 22240 is a cylindrical surface (not shown in the figure) protruding toward the other extension plate 22242, and the generatrix of the cylindrical surface is parallel to the second direction Y. In this way, the manufacturing and assembly accuracy requirements for the clamping jaws 2224 can be appropriately reduced, and when the clamping jaws 2224 are closed to clamp the battery electrode a, the clamping surfaces 22240 corresponding to the two extension plates 22242 abut against each other.

[0044] like Figure 2As shown, a side of the support panel 212 away from the linear module 211 is equipped with a plurality of feed rollers 2121, and the plurality of feed rollers 2121 are arranged at intervals along the first direction X. In this embodiment, the axial direction of the feed roller 2121 is parallel to the second direction Y, and the feed roller 2121 is rotatably mounted on the support panel 212. The feed roller 2121 can reduce the friction between the battery electrode a and the support panel 212, thereby reducing the risk of damage to the battery electrode a during the loading process.

[0045] Optionally, a support plane is arranged between two adjacent feed rollers 2121 on the support panel 212, and in the longitudinal direction, the feed roller 2121 is slightly higher than the support plane. Optionally, the height difference between the highest point of the feed roller 2121 in the longitudinal direction and the support plane is 0.5mm-1mm.

[0046] 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 consistent, and the diaphragm feeding mechanism 1 providing the upper diaphragm 11 is taken as an example for explanation. The diaphragm feeding mechanism 1 includes a longitudinal plate 13, and a discharge roller 14, a tension swing roller 15 and a dust removal and iron removal assembly 16 are sequentially arranged on the longitudinal plate 13 along the diaphragm conveying path. The discharge 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 impurities or iron filings impurities attached to the upper diaphragm 11 to ensure the cleanliness of the diaphragm. In this embodiment, there are at least two discharge rollers 14, and the longitudinal plate 13 is also equipped with a diaphragm joint assembly for joining the upper diaphragms 11 on the two discharge rollers 14 to achieve uninterrupted production and ensure production efficiency.

[0047] In this embodiment, the tension swing roller 15, the dust and iron removal assembly 16 and the diaphragm belt assembly can be any existing tension swing roller 15, the dust and iron removal assembly 16 and the diaphragm belt assembly, which are existing technologies and will not be described in detail here.

[0048] Further, at least one roller 17 is arranged between the unwinding roller 14 and the tension swing roller 15, and between the tension swing roller 15 and the dust and iron removal. The roller 17 is used to change the travel route of the upper diaphragm 11, and can be specifically arranged according to needs, and is not limited here.

[0049] like Figure 7As shown, the hot composite rolling mechanism 3 includes a hot roller part 31 and a cold roller part 32 arranged in sequence along the conveying direction of the battery electrode sheet a. The electrode sheet 10 to be pressed, which is composed of the battery electrode sheet a, the upper diaphragm 11 and the lower diaphragm 12, passes through the hot roller part 31 and the cold roller part 32 in sequence; the inlet end of the hot roller part 31 is provided with a closing roller part 30 for pre-pressing the electrode sheet 10 to be pressed. In this embodiment, the conveying direction of the battery electrode sheet a is parallel to the first direction X. The battery electrode sheet a and the upper and lower diaphragms are partially melted and connected by the hot roller part 31, and then quickly cooled and solidified by the cold roller part 32. After the closing roller section 30 pre-presses the battery pole piece a and the upper and lower diaphragms, that is, the pole piece 10 to be pressed, it can stabilize the state of the pole piece 10 to be pressed so that it enters the hot roller section 31 with a stable structure. At the same time, it can remove the air between the diaphragm and the battery pole piece a by pre-pressing, thereby improving the degree of fit between the diaphragm and the battery pole piece a, so that the diaphragm and the battery pole piece a enter the hot roller section 31 in a nearly parallel posture for rolling, reducing the wrap angle of the diaphragm on the roller of the hot roller section 31, avoiding premature heating of the diaphragm, and helping to ensure processing quality.

[0050] like Figures 8 to 11 As shown, the roller-closing section 30 includes a first fixed roller 301 and a first movable roller 302 arranged in parallel, the first movable roller 302 can approach or move away from the first fixed roller 301, and the electrode sheet 10 to be pressed is between the first fixed roller 301 and the first movable roller 302; the gap between the first fixed roller 301 and the first movable roller 302 is defined as the first pre-pressing gap 300a; the roller-closing section 30 also includes a guide plate assembly 34 arranged on the downstream side of the first pre-pressing gap 300a, the guide plate assembly 34 includes two guide plates 341 arranged opposite to each other, and the gap between the two guide plates 341 is defined as the second pre-pressing gap 300b, and the width of the second pre-pressing gap 300b close to 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. As shown Figure 7 As shown, the hot composite rolling mechanism 3 further includes a frame 33 , the hot roller portion 31 and the cold roller portion 32 are both arranged on the frame 33 , and the composite roller portion 30 is installed on the frame 33 or the hot roller portion 31 .

[0051] In this embodiment, preferably, the roller unit 30 is arranged on the hot roller unit 31. Specifically, the roller unit 30 further includes two first mounting plates 303 arranged opposite to each other, the first fixed roller 301 is rotatably mounted between the two first mounting plates 303, a first adjusting block 3031 is slidably mounted on the first mounting plate 303 along the longitudinal direction through a slide rail slider assembly, the first movable roller 302 is rotatably mounted on the first adjusting block 3031, and a cylinder for driving the first adjusting block 3031 to move is mounted on the first mounting plate 303. When 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 diaphragm and the battery electrode sheet a, and then enters the second pre-pressing gap 300b from the large end of the second pre-pressing gap 300b for further shaping.

[0052] like Fig.11 As shown, the second pre-pressing gap 300b includes a first section 300b1 and a second section 300b2 that are interconnected, wherein the first section 300b1 is arranged close to the first pre-pressing gap 300a, that is, the width of the first section 300b1 gradually decreases in the conveying direction of the electrode sheet 10 to be pressed, and the width of the second section 300b2 is less than or equal to the minimum width of the first section 300b1. Such an arrangement facilitates the electrode sheet 10 to be pressed that has been shaped through the first pre-pressing gap 300a to smoothly pass through the first section 300b1 and enter the second section 300b2 for further shaping.

[0053] Furthermore, if Fig.10 and Fig.11 As shown, the roller-closing part 30 also includes a second fixed roller 304 and a second movable roller 305 arranged in parallel. The second fixed roller 304 is arranged in parallel with the first fixed roller 301. The second movable roller 305 can approach or move away from the second fixed roller 304. The electrode sheet 10 to be pressed is 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. The second adjustment block 3032 is slidably mounted on the first mounting plate 303 through the slide rail slider assembly in the longitudinal direction. The second movable roller 305 is rotatably mounted on the second adjustment block 3032. The first mounting plate 303 is equipped with a cylinder for driving the second adjustment block 3032 to move. In this way, the adjustment of the third pre-pressing gap can be achieved. In this embodiment, a motor is disposed on the first mounting plate 303 for driving the second fixed roller 304 to rotate, so as to cooperate with the second movable roller 305 to drive the electrode sheet 10 to be pressed into the hot roller portion 31 .

[0054] Optionally, during the conveying process 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.

[0055] 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 moves horizontally.

[0056] like Fig.12 and Fig.13As shown, the hot roller part 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 the upper roller frame 312 is slidably connected to the lower roller frame 311; the lower roller frame 311 is equipped with an upper roller adjustment frame 313, and the upper roller adjustment frame 313 is equipped with a third driving member for driving the upper roller frame 312 to move longitudinally, the upper roller frame 312 is rotatably equipped with a first upper roller 314, and the lower roller frame 311 is rotatably equipped with a first lower roller 315; the lower roller frame 311 is equipped with a lower adjustment plate 313. 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 arranged on the third adjusting block 3114, a second adjusting slope 31130 adapted to the first adjusting slope 31140 is arranged on a side of the upper adjusting plate 3113 facing the third adjusting block 3114, and the first adjusting slope 31140 acts on the second adjusting slope 31130 to adjust the longitudinal height of the upper roller frame 312.

[0057] In this embodiment, the lower roller frame 311 is equipped with a guide column 3111 extending in the longitudinal direction, and the upper roller frame 312 is provided with a guide hole (not shown in the figure) corresponding to the guide column 3111, and the guide column 3111 is slidably embedded in the guide hole. The third driving member is a cylinder or an electric cylinder, which drives the upper roller frame 312 to drive the first upper roller 314 to move closer to or away from the first lower roller 315 in the longitudinal direction, so as to adjust the gap between the first upper roller 314 and the first lower roller 315. On this basis, the first adjustment bevel 31140 cooperates with the second adjustment bevel 31130 to achieve fine adjustment of the gap size between the first upper roller 314 and the first lower roller 315 to achieve the corresponding processing accuracy.

[0058] In this embodiment, the lower roller frame 311 is equipped with a shaft seat 3116, and an adjusting screw 3115 is rotatably mounted on the shaft seat 3116. The adjusting screw 3115 passes through the third adjusting block 3114 and is threadedly connected thereto.

[0059] Optionally, the first mounting plate 303 is detachably mounted on the upper roller adjustment frame 313 by screws or bolts.

[0060] like Fig.12 As shown, a support plate 316 is mounted on the upper roller adjustment frame 313 or the lower roller frame 311 , and the support plate 316 is used to support the electrode sheet 10 to be pressed in the longitudinal direction.

[0061] In this embodiment, optionally, the cold roller part 32 has the same structure as the hot roller part 31. Fig.14 As shown, no further description is given here.

[0062] like Figure 7As shown, the lower roller frame 311 is slidably installed on the frame 33 through a slide rail slider assembly, and is driven by a screw rod set on the frame 33 to adjust the spatial position of the hot roller part 31 or the cold roller part 32 on the frame 33.

[0063] In this embodiment, a method for using the pole piece hot composite rolling device is also provided, which is applied to the aforementioned pole piece hot composite rolling device, and includes the following steps:

[0064] S1: unwinding the upper diaphragm 11 and the lower diaphragm 12 and feeding them into the hot composite rolling mechanism 3;

[0065] S2: placing the battery electrode piece a on the support part 21, and grabbing and positioning the battery electrode piece a by at least two grabbing components 22 arranged on the support part 21, wherein the at least two grabbing components 22 are evenly distributed in an area of ​​the battery electrode piece a along the first direction X;

[0066] S3: At least two grasping assemblies 22 move synchronously toward the hot composite rolling mechanism 3 to transport the battery electrode a, and as the battery electrode a gradually enters the hot composite rolling mechanism 3, at least two grasping assemblies 22, starting from the grasping assembly 22 closest to the hot composite rolling mechanism 3, release the grasping positioning of the battery electrode a in turn.

[0067] In this way, during the process of the battery pole piece a entering the hot composite rolling mechanism 3 for processing, the pole piece feeding mechanism 2 can limit and fix the area of ​​the battery pole piece a that has not entered the hot composite rolling mechanism 3 for a long time, thereby effectively preventing relative displacement or local wrinkles between the battery pole piece a and the diaphragm, thereby ensuring the processing quality.

[0068] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A pole piece hot composite rolling equipment, characterized in that: It includes two diaphragm feeding mechanisms, a pole piece feeding mechanism and a hot composite rolling mechanism. The two diaphragm feeding mechanisms are used to transport the upper diaphragm and the lower diaphragm to the hot composite rolling mechanism. The pole piece feeding mechanism is used to transport the battery pole piece to the hot composite rolling mechanism. The battery pole piece is between the upper diaphragm and the lower diaphragm. The movement paths of the battery pole piece, the upper diaphragm and the lower diaphragm on the hot composite rolling mechanism are consistent, wherein: The pole piece feeding mechanism comprises a support portion extending along a first direction, and the hot composite rolling mechanism is arranged at an end portion of the support portion along the first direction; At least two gripping assemblies are arranged on the support portion, and the gripping assemblies are used to grip the battery pole pieces on the support portion. The gripping assemblies can move relative to the support portion along the first direction to approach or move away from the hot composite rolling mechanism.

2. The pole piece hot composite rolling equipment according to claim 1, characterized in that: The support portion includes a linear module and a support panel arranged at intervals in the longitudinal direction, wherein the support panel is located above the linear module and is used to carry the battery electrode sheet; The linear module is equipped with at least two movers corresponding to at least two grabbing components one by one, and the grabbing components are installed on the corresponding movers.

3. The pole piece hot composite rolling equipment according to claim 2, characterized in that: The grabbing assembly includes a connecting plate mounted on the mover, two grabbing parts are arranged on the connecting plate, the supporting panel is located between the two grabbing parts, and the grabbing parts are used to grab the battery pole piece located on the supporting panel.

4. The pole piece hot composite rolling equipment according to claim 3, characterized in that: The grabbing portion includes a first driving member, an adapter plate and a clamping claw arranged on the connecting plate, the clamping claw is installed on the adapter plate, and the first driving member is used to drive the adapter plate to approach or move away from the battery electrode sheet on the supporting panel along the second direction; The first direction, the second direction and the longitudinal direction are perpendicular to each other.

5. The pole piece hot composite rolling equipment according to claim 2, characterized in that: A side of the support panel away from the linear module is equipped with a plurality of feeding rollers, and the plurality of feeding rollers are arranged at intervals along a first direction.

6. The pole piece hot composite rolling equipment according to claim 1, characterized in that: The hot composite rolling mechanism comprises a hot roller part and a cold roller part which are arranged in sequence along the conveying direction of the battery pole piece, and the pole piece to be pressed consisting of the battery pole piece, the upper diaphragm and the lower diaphragm passes through the hot roller part and the cold roller part in sequence; The inlet end of the hot roller part is provided with a closing roller part for pre-pressing the electrode sheet to be pressed.

7. The pole piece hot composite rolling equipment according to claim 6, characterized in that: The roller closing 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 electrode sheet to be pressed is located between the first fixed roller and the first movable roller; defining a gap between the first fixed roller and the first movable roller as a first pre-pressing gap; The closing roller section further comprises a guide plate assembly arranged at the downstream side of the first pre-pressing gap, the guide plate assembly comprises two guide plates arranged opposite to each other, 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 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.

8. The pole piece hot composite rolling equipment according to claim 7, characterized in that: The roller closure unit further comprises a second fixed roller and a second movable roller arranged in parallel, wherein the second fixed roller is arranged in parallel with the first fixed roller, the second movable roller can approach or move away from the second fixed roller, and the electrode sheet to be pressed is located between the second fixed roller and the second movable roller; The gap between the second fixed roller and the second moving roller is defined as the 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.

9. The pole piece hot composite rolling equipment according to claim 8, characterized in that: The hot roller unit comprises a lower roller frame and an upper roller frame, wherein the upper roller frame is located above the lower roller frame and is slidably connected to the lower roller frame; The lower roller frame is equipped with an upper roller adjustment frame, and the upper roller adjustment frame is equipped with a third driving member for driving the upper roller frame to move longitudinally. The upper roller frame is rotatably mounted with a first upper roller, and the lower roller frame is rotatably mounted with a first lower roller; The lower roller frame is equipped with a lower adjustment plate, the upper roller frame is equipped with an upper adjustment plate, the lower adjustment plate is slidably equipped with a third adjustment block, the third adjustment block is provided with a first adjustment slope, and the side of the upper adjustment plate facing the third adjustment block is provided with a second adjustment slope adapted to the first adjustment slope, the first adjustment slope acts on the second adjustment slope to adjust the longitudinal height of the upper roller frame.

10. A method for using a pole piece hot composite rolling press device, applied to the pole piece hot composite rolling press device as claimed in any one of claims 1 to 9, characterized in that: The steps include: Unwinding the upper diaphragm and the lower diaphragm and sending them into the hot composite rolling mechanism; Placing a battery electrode sheet on a support portion, and grasping and positioning the battery electrode sheet by at least two grasping assemblies arranged on the support portion, wherein the at least two grasping assemblies are evenly distributed at equal distances within a region of the battery electrode sheet along a first direction; At least two grasping assemblies move synchronously toward the hot composite rolling mechanism to transport the battery pole sheet, and as the battery pole sheet gradually enters the hot composite rolling mechanism, at least two grasping assemblies, starting from the grasping assembly closest to the hot composite rolling mechanism, release the grasping positioning of the battery pole sheet in sequence.

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