Pole piece cutting device, pole piece production device and battery production line

Abstract

The utility model relates to the technical field of battery production equipment, in particular to a pole piece cutting device, a pole piece production device and a battery production line. The pole piece cutting device comprises a cutting platform, a feeding mechanism and a cutting mechanism. The feeding mechanism comprises a discharging roller and a collecting structure arranged on the upstream of the discharging roller, and the discharging roller is arranged close to the upper surface of the cutting platform. The cutting mechanism is arranged above the cutting platform and located at the downstream position of the feeding mechanism, and the cutting mechanism is suitable for cutting the pole piece material belt. The feeding mechanism can convey a pole piece material belt to the cutting platform, and after the cutting mechanism cuts the last pole piece, the collecting structure drives the pole piece material belt to move along the upstream of the discharging roller, so that the pole piece material belt protrudes towards the protruding end of the feeding mechanism, and tailings are recycled. Therefore, the pole piece cutting device not only can feed materials, but also can collect the materials, so that the production efficiency is improved, and the occupied space is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production equipment, and in particular to a pole piece cutting device, a pole piece making device and a battery production line. Background Art

[0002] The production of battery pole pieces is one of the important processes in battery production and processing. Usually, the pole piece material strip is cut by a pole piece cutting device to obtain the required pole piece.

[0003] The existing pole piece cutting device generally includes a processing table, a cutting mechanism and a feeding mechanism, etc. The feeding mechanism transports the pole piece strip to the processing table, and then a laser of the cutting mechanism cuts the pole piece strip into multiple pole pieces, and another laser cuts the pole ears. Since the two lasers cannot overlap in space, there are blank stations in the pole piece cutting process, which in turn generates cutting tails, which are then returned to the processing table by the recycling mechanism. The feeding and tailing are completed by the cooperation of the feeding mechanism and the recycling mechanism, which is inefficient and occupies a large space. Utility Model Content

[0004] In view of this, the utility model provides a pole piece cutting device to solve the problem that the existing pole piece cutting device needs to cooperate with two different mechanisms to complete feeding and finishing, resulting in low production efficiency and large space occupation.

[0005] In order to achieve the above objectives, the following technical solutions are provided:

[0006] The pole piece cutting device comprises:

[0007] Cutting platform;

[0008] The feeding mechanism comprises a feeding roller and a receiving structure arranged upstream of the feeding roller, wherein the feeding roller is arranged close to the upper surface of the cutting platform;

[0009] A cutting mechanism, arranged above the cutting platform and located downstream of the feeding mechanism, the cutting mechanism being suitable for cutting the pole piece strip;

[0010] Among them, after the cutting mechanism cuts the last pole piece, the material collection structure is suitable for driving the pole piece material strip to move upstream of the unwinding roller to recycle the pole piece material strip that protrudes from the unwinding roller.

[0011] Optionally, the material receiving structure includes:

[0012] Main drive roller, which is arranged upstream of the unwinding roller and can rotate forward or reverse;

[0013] The first pressing roller is movably arranged above the main driving roller, and the first pressing roller moves close to or away from the main driving roller to press the pole piece strip onto the main driving roller.

[0014] Optionally, the material receiving structure further includes a linear drive member and a mounting seat, the first pressing roller is rotatably disposed on the mounting seat, and the mounting seat is connected to the output end of the linear drive member.

[0015] Optionally, the feeding mechanism further includes a feeding rack, which includes a bottom plate and two side plates respectively arranged on both sides of the bottom plate, and the main driving roller and the unwinding roller are both rotatably arranged on the two side plates.

[0016] Optionally, the feeding rack also includes a support plate, which is arranged below the unloading roller and is suitable for supporting the electrode material strip. A running gap is formed between the unloading roller and the support plate, and the running gap is located downstream of the base plate. After the cutting mechanism cuts the last electrode sheet, the material collecting structure makes the end of the electrode material strip flush with the front edge of the support plate or located on the inner side of the front edge of the support plate.

[0017] Optionally, a material clamping notch is provided on the front side of the support plate.

[0018] Optionally, the feeding mechanism further comprises a detection element, which is arranged downstream of the discharge roller and close to the discharge roller.

[0019] Optionally, the feeding mechanism further includes a tension structure, which is arranged upstream of the unwinding roller, and includes:

[0020] Two transmission rollers, the two transmission rollers are arranged at an interval, and the pole piece strip is transmitted on the upper surfaces of the two transmission rollers;

[0021] The second pressing roller is arranged between the two driving rollers and is located above the pole piece strip. The second pressing roller is movably arranged in the up-down direction to press the pole piece strip.

[0022] Optionally, the tension structure further includes a torsion spring, one end of which is fixedly arranged, and the other end of which is connected to the second pressure roller, so that the torsion spring applies a force toward the pole piece strip to the second pressure roller.

[0023] Optionally, the feeding mechanism further comprises a buffer structure, which is arranged upstream of the unloading roller, and the buffer structure is suitable for buffering the tail of the pole piece strip recovered by the unloading roller.

[0024] Optionally, the cutting platform and the feeding mechanism can move relative to each other, and the electrode cutting device further comprises a clamping mechanism, which is arranged above the cutting platform. During the relative movement of the cutting platform and the feeding mechanism, the clamping mechanism and the feeding mechanism have a first position in which they are in a material receiving state after being close to each other, and a second position in which they are in a material spreading state after being away from each other;

[0025] The clamping mechanism has a clamping state and a loosening state. Before the clamping mechanism moves to the first position relative to the feeding mechanism, the clamping mechanism first switches to the loosening state. After the clamping mechanism moves to the first position relative to the feeding mechanism, the clamping mechanism is in the clamping state and fixes the pole piece strip on the cutting platform. During the process of the clamping mechanism moving to the second position relative to the feeding mechanism, the clamping mechanism maintains the clamping state.

[0026] Optionally, the pole piece cutting device further comprises a fixed table, the cutting platform is reciprocatingly slidably arranged on the fixed table, the cutting platform has a first position and a second position on the fixed table, and the feeding mechanism is fixedly arranged above the fixed table;

[0027] When the cutting platform is in the first position, the clamping mechanism is in a clamping state and is located in front of and close to the feeding mechanism. During the process of the cutting platform sliding from the first position to the second position, the clamping mechanism maintains the clamping state, the pole piece strip is pulled out from the feeding mechanism and moves synchronously with the cutting platform. When the cutting platform moves to the second position, the clamping mechanism is located at the second position.

[0028] Optionally, the pole piece cutting device further comprises a fixed table, the cutting platform is fixedly arranged on the fixed table, the feeding mechanism is reciprocatingly slidably arranged on the fixed table, and the feeding mechanism has a first position and a second position on the fixed table;

[0029] When the feeding mechanism moves from the second position to the first position, the feeding mechanism drives the pole piece material strip to the first position, and the clamping mechanism switches from the loose material state to the clamping material state to clamp the pole piece material strip. Then, during the process of the feeding mechanism retreating to the second position, the clamping mechanism maintains the clamping material state, and the pole piece material strip is pulled out from the feeding mechanism. After the feeding mechanism moves to the second position, the feeding mechanism is in the laying state, and lays the pole piece material strip on the cutting platform.

[0030] Optionally, the cutting mechanism is movably disposed above the fixed table;

[0031] After the cutting platform moves from the first position to the second position, the cutting mechanism moves along the conveying direction of the pole piece strip and cuts the pole piece strip into a plurality of pole pieces.

[0032] Optionally, the cutting mechanism is movably disposed above the fixed table;

[0033] Among them, when the feeding mechanism retreats to the first position, the cutting mechanism moves above the cutting platform along the conveying direction of the pole piece strip and cuts the pole piece strip into a plurality of pole pieces.

[0034] Optionally, the cutting mechanism is fixedly arranged above the fixed platform;

[0035] In the process of the cutting platform moving from the first position to the second position, the cutting platform drives the pole piece strip through the cutting mechanism, and the cutting mechanism cuts the pole piece strip into a plurality of pole pieces.

[0036] A pole piece making device comprises the pole piece cutting device mentioned above.

[0037] A battery production line comprises the above-mentioned electrode sheet making device.

[0038] The beneficial effects of the utility model are:

[0039] The pole piece cutting device provided by the utility model conveys the pole piece material strip through a feeding mechanism. In addition, the feeding mechanism also includes a receiving structure, which can drive the pole piece material strip to move upstream of the unwinding roller. Then, after the cutting mechanism cuts the last pole piece, the receiving structure will recycle the pole piece material strip that partially protrudes from the unwinding roller. It can be seen that the pole piece cutting device can realize both feeding and tail material collection, which can improve the overall production efficiency, reduce the number of devices required for processing pole pieces, and reduce the occupied space. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A schematic diagram of the structure of the pole piece cutting device provided by the utility model;

[0042] Figure 2 for Figure 1 A magnified view of part A;

[0043] Figure 3 Another structural schematic diagram of the pole piece cutting device provided by the utility model;

[0044] Figure 4 for Figure 3 A magnified view of part B;

[0045] Figure 5 for Figure 3 A partial enlarged rear view of part B in the middle;

[0046] Figure 6 It is a structural schematic diagram of a part of the cutting platform;

[0047] Figure 7 is a schematic structural diagram of a pole piece cutting device according to the second embodiment of the present invention;

[0048] Figure 8 for Figure 6 Enlarged view of part C;

[0049] Fig. 9 for Figure 6 A magnified view of part D in the middle;

[0050] Fig.10 It is a schematic diagram of the coordination process between the feeding mechanism and the clamping mechanism.

[0051] Reference numerals:

[0052] 1. Cutting platform; 11. Adsorption hole;

[0053] 2. Feeding mechanism; 21. Feeding roller; 22. Main driving roller; 23. First pressing roller; 24. Linear driving member; 25. Mounting seat; 26. Feeding rack; 261. Bottom plate; 262. Side plate; 263. Support plate; 264. Material clamping notch; 27. Tension structure; 271. Transmission roller; 272. Second pressing roller; 273. Torsion spring;

[0054] 3. Cutting mechanism;

[0055] 4. Fixed table;

[0056] 5. Material clamping mechanism. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0058] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0060] In the description of the present invention, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, 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 of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0061] Embodiment 1:

[0062] like Figure 1 and Figure 3 As shown, this embodiment provides a pole piece cutting device, which includes a cutting platform 1, a feeding mechanism 2 and a cutting mechanism 3. Figure 2 and Figure 4 As shown, the feeding mechanism 2 includes a discharge roller 21 and a receiving structure arranged upstream of the discharge roller 21, and the discharge roller 21 is arranged close to the upper surface of the cutting platform 1. The cutting mechanism 3 is arranged above the cutting platform 1 and located downstream of the feeding mechanism 2, and the cutting mechanism 3 is suitable for cutting the pole piece strip. Among them, the feeding mechanism 2 can convey the pole piece strip to the cutting platform 1, and after the cutting mechanism 3 cuts the last pole piece, the receiving structure is suitable for driving the pole piece strip to move along the upstream of the discharge roller 21 to recover the pole piece strip that partially protrudes from the discharge roller 21. In addition, the feeding mechanism 2 can convey the pole piece strip to the cutting platform 1.

[0063] In the electrode cutting device of this embodiment, the feeding mechanism 2 can convey the electrode material strip to the cutting platform 1 to cut the electrode material strip. In addition, the collecting structure can drive the electrode material strip to move upstream of the discharge roller 21, and then, after the cutting mechanism 3 cuts the last electrode, the collecting structure will recover the electrode material strip that partially protrudes from the discharge roller 21. It can be seen that the electrode cutting device can realize both feeding and collecting tail materials, which can improve the overall production efficiency, reduce the number of devices required for processing the electrode, and reduce the occupied space.

[0064] Further, the material collection structure includes a main drive roller 22 and a first pressure roller 23. The main drive roller 22 is arranged upstream of the unloading roller 21, and the main drive roller 22 can rotate forward or reverse. The first pressure roller 23 is movably arranged above the main drive roller 22, and the first pressure roller 23 moves close to or away from the main drive roller 22 to press the pole piece strip on the main drive roller 22. When the main drive roller 22 rotates forward, the pole piece strip can be transferred to the downstream of the unloading roller 21 to transfer the pole piece strip to the cutting platform 1. After the cutting mechanism 3 cuts the pole piece, the main drive roller 22 reverses and drives the unloading roller 21 to reverse, thereby recovering the pole piece strip that partially protrudes from the unloading roller 21. During the recovery process, the first pressure roller 23 presses the pole piece strip on the main drive roller 22. When the main drive roller 22 rotates, the first pressure roller 23 also rotates under the drive of the main drive roller 22, thereby realizing the pulling force on the pole piece strip.

[0065] In addition, the main drive roller 22 can also only drive the pole piece material belt to be transferred upstream of the unwinding roller 21 to recover the tail material. When the feeding mechanism 2 unwinds the material, the pole piece material belt is driven by other drive rollers to be transferred downstream of the unwinding roller 21. At this time, the main drive roller 22 only serves as a passing roller (the main drive roller 22 does not provide driving force), and the pole piece material belt is finally transferred to the cutting platform 1 through the main drive roller 22 and the unwinding roller 21.

[0066] Specifically, the main driving roller 22 is driven by a servo motor, which can rotate forward and reverse and has the advantages of fast dynamic response and high stability.

[0067] Preferably, the output end of the servo motor is connected to a reducer to increase the torque and reduce the inertia of the servo motor output.

[0068] Furthermore, in order to enable the first pressure roller 23 to both rotate and move closer to or away from the main drive roller 22, the feeding mechanism 2 also includes a linear drive member 24 and a mounting seat 25. The first pressure roller 23 is rotatably disposed on the mounting seat 25, and the mounting seat 25 is connected to the output end of the linear drive member 24.

[0069] Specifically, the linear drive member 24 is a cylinder, which has the advantages of compact structure, small size and high control accuracy.

[0070] Furthermore, the material receiving structure also includes a feeding rack 26, which includes a bottom plate 261 and two side plates 262 respectively arranged on both sides of the bottom plate 261, and the bottom plate 261 is connected to the side plates 262 on both sides of the opposite sides along the transmission direction of the pole piece material strip, and the main drive roller 22 and the unwinding roller 21 are both rotatably arranged on the two side plates 262. The pole piece material strip can move on the bottom plate 261 between the main drive roller 22 and the unwinding roller 21, and a transmission channel is formed between the two side plates 262 to prevent the pole piece material strip from being offset during the transmission process. Specifically, the bottom plate 261 of this embodiment is tilted, and the height of the upper surface of the bottom plate 261 gradually decreases along the transmission direction of the pole piece material strip to facilitate the transmission of the pole piece material strip.

[0071] Furthermore, if Figure 4 As shown, the feeding rack 26 also includes a support plate 263, which is arranged below the unloading roller 21 and is suitable for supporting the pole piece strip. A running gap is formed between the unloading roller 21 and the support plate 263, and the running gap is located at the downstream position of the bottom plate 261. The pole piece strip moves through the running gap to prevent the pole piece strip from being offset. After the cutting mechanism 3 cuts the last pole piece, the material collection structure makes the protruding end of the pole piece strip flush with the front edge of the support plate 263 or located on the inner side of the front edge of the support plate 263, so that the unloading roller 21 can recycle the tail material.

[0072] Furthermore, a clamping notch 264 is provided on the front side of the support plate 263 , and the clamping notch 264 faces the clamping mechanism 5 and can cooperate with the clamping mechanism 5 so that the clamping mechanism 5 can clamp the end of the pole piece strip from the clamping notch 264 .

[0073] Furthermore, the feeding mechanism 2 further includes a detection element, which is arranged downstream of the unloading roller 21 and close to the unloading roller 21. The detection element can detect the accuracy of the position of the pole piece strip when unloading and collecting, to prevent unloading failure and failure to recover tailings, and to prevent excessive recovery of tailings, so that the tailings are completely immersed in the clamping notch 264, resulting in failure to unload the next time.

[0074] Specifically, the detection element is a positioning optical fiber sensor, which has the advantages of small size and high sensitivity.

[0075] Furthermore, if Figure 5 As shown, the feeding mechanism 2 also includes a tension structure 27, which is arranged upstream of the unloading roller 21, and the tension structure 27 includes two transmission rollers 271 and a second pressure roller 272. The two transmission rollers 271 are arranged at intervals, and the pole piece material belt is driven on the upper surface of the two transmission rollers 271. The second pressure roller 272 is arranged between the two transmission rollers 271 and above the pole piece material belt, and the second pressure roller 272 is movably arranged in the up and down directions to press the pole piece material belt. The pole piece material belt will fluctuate during the movement, and the tension structure 27 provides tension for the pole piece material belt, which can make the pole piece material belt more stable during the movement.

[0076] Furthermore, in order to enable the second pressure roller 272 to press the pole piece strip, the tension structure 27 also includes a torsion spring 273, one end of which is fixedly arranged and the other end of the torsion spring 273 is connected to the second pressure roller 272, so that the torsion spring 273 applies a force toward the pole piece strip to the second pressure roller 272.

[0077] Furthermore, the feeding mechanism 2 further includes a buffer structure, which is arranged upstream of the discharge roller 21 and is suitable for buffering the tailings of the pole piece strip recovered by the discharge roller 21. The recovered tailings are finally stored in the buffer structure to improve the recovery efficiency of the tailings.

[0078] Furthermore, the cutting platform 1 and the feeding mechanism 2 can move relative to each other, which can be understood as one of the cutting platform 1 and the feeding mechanism 2 is fixed and the other is moving; or the cutting platform 1 and the feeding mechanism 2 are both moving. The electrode cutting device also includes a clamping mechanism 5, which is arranged above the cutting platform 1. The clamping mechanism 5 has the same motion state as the cutting platform 1. During the relative movement of the cutting platform 1 and the feeding mechanism 2, the clamping mechanism 5 and the feeding mechanism 2 have a first position in which they are in a material receiving state and a second position in which they are in a material spreading state. The clamping mechanism 5 has a clamping state and a loosening state. Before the clamping mechanism 5 moves to the first position relative to the feeding mechanism 2, the clamping mechanism 5 first switches to the loosening state. After the clamping mechanism 5 moves to the first position relative to the feeding mechanism 2, the clamping mechanism 5 is in a clamping state and fixes the electrode material strip on the cutting platform 1. At this time, the clamping mechanism 5 completes the material receiving. During the movement of the clamping mechanism 5 to the second position relative to the feeding mechanism 2, the clamping mechanism 5 maintains the clamping state.

[0079] During the feeding process of the feeding mechanism 2 onto the cutting platform 1, before the clamping mechanism 5 moves to the first position relative to the feeding mechanism 2, the clamping mechanism 5 is in a loose state, and then the feeding mechanism 2 conveys the pole piece strip into the clamping mechanism 5. Next, after the clamping mechanism 5 continues to move relative to the feeding mechanism 2 until the first position, the clamping mechanism 5 is in a clamping state at this time to fix the pole piece strip on the cutting platform 1, and the clamping mechanism 5 completes the material connection at this time. Finally, during the process of the clamping mechanism 5 driving the pole piece strip to move to the second position relative to the feeding mechanism 2, the clamping mechanism 5 maintains the clamping state to extract the pole piece strip from the feeding mechanism 2 and lay it on the cutting platform 1. After the clamping mechanism 5 drives the pole piece strip to move to the second position relative to the feeding mechanism 2, the pole piece strip is completely laid on the cutting platform 1. It can be seen that the electrode cutting device of this embodiment can realize the automatic clamping and loosening of the clamping mechanism 5 and lay the electrode strip on the cutting platform 1 only through the relative movement between the cutting platform 1 and the feeding mechanism 2, thereby saving the operation time of laying the electrode strip on the processing table and greatly improving the production efficiency.

[0080] Furthermore, the electrode sheet cutting device further comprises a fixed platform 4, on which the cutting platform 1 is reciprocatingly slidably arranged, the cutting platform 1 has the above-mentioned first position and the above-mentioned second position on the fixed platform 4, and the feeding mechanism 2 is fixedly arranged above the fixed platform 4. Figure 1 and Figure 2As shown, when the cutting platform 1 is in the first position, the clamping mechanism 5 is in the clamping state and is located in front of the feeding mechanism 2 and close to the feeding mechanism 2. During the process of the cutting platform 1 sliding from the first position to the second position, the clamping mechanism 5 maintains the clamping state, and the pole piece strip is drawn out from the feeding mechanism 2 and moves synchronously with the cutting platform 1. Figure 3 and Figure 4 As shown, before the cutting platform 1 moves to the second position, the clamping mechanism 5 can be switched from the clamping state to the loosening state. Before the cutting platform 1 moves to the second position, the clamping mechanism 5 is located at the second position and in the loosening state, so as to facilitate the removal of the cut pole piece. In this scheme, the feeding mechanism 2 is fixedly arranged, and then the cutting platform 1 moves between the first position and the second position to realize the automatic clamping and feeding of the clamping mechanism 5, and then the pole piece strip is laid on the cutting platform 1.

[0081] Furthermore, the cutting mechanism 3 is movably arranged above the fixing platform 4. After the cutting platform 1 moves from the first position to the second position, the cutting mechanism 3 moves along the conveying direction of the pole piece strip and cuts the pole piece strip into a plurality of pole pieces. By making the cutting mechanism 3 movable, the cutting mechanism 3 can cut the pole piece strip more conveniently and efficiently.

[0082] This embodiment also provides another implementation of the cutting mechanism 3, that is, the cutting mechanism 3 is fixedly arranged above the fixing platform 4. In the process of the cutting platform 1 moving from the first position to the second position, the cutting platform 1 drives the pole piece strip through the cutting mechanism 3, and the cutting mechanism 3 cuts the pole piece strip into a plurality of pole pieces. This solution allows the cutting mechanism 3 to be fixedly arranged, and the cutting platform 1 has completed the cutting of the pole piece strip after moving from the first position to the second position, making the cutting operation more efficient.

[0083] Furthermore, if Figure 6 As shown, the cutting platform 1 is provided with a plurality of adsorption holes 11, which are suitable for adsorbing the electrode strip. A vacuum cavity is provided in the cutting platform 1, which is connected to the plurality of adsorption holes 11. The vacuum cavity is also connected to an external vacuum pump, and the vacuum pump generates negative pressure in the vacuum cavity, so that the plurality of adsorption holes 11 adsorb the electrode strip on the cutting platform 1. When the cutting platform 1 moves from the first position to the second position, the cutting platform 1 drives the electrode strip through the cutting mechanism 3. After the cutting mechanism 3 cuts the first electrode, the clamping mechanism 5 cannot continue to pull the electrode strip behind to move, but the electrode strip behind the first electrode is adsorbed on the cutting platform 1 by the plurality of adsorption holes 11, and then the cutting platform 1 drives the strip to move together through the adsorption force of the adsorption holes 11. In addition, during the process of the cutting mechanism 3 cutting the electrode strip, the adsorption holes 11 on the cutting platform 1 continuously adsorb the electrode strip to prevent the electrode strip from deflecting under the action of the cutting force.

[0084] Specifically, the cutting mechanism 3 includes a laser, which emits laser to cut the pole piece strip, and laser cutting is more efficient and accurate.

[0085] Embodiment 2:

[0086] The structure of the pole piece cutting device of the second embodiment of the present invention is basically the same as that of the first embodiment. The difference between the second embodiment and the first embodiment is that the cutting platform 1 of the second embodiment is fixedly arranged on the fixed table 4, and the feeding mechanism 2 can be reciprocatingly slidably arranged on the fixed table 4.

[0087] Specifically, if Figure 7 As shown, the cutting platform 1 is fixedly arranged on the fixed platform 4, and the feeding mechanism 2 is reciprocatingly slidably arranged on the fixed platform 4. The feeding mechanism 2 has the above-mentioned first position and the above-mentioned second position on the fixed platform 4. Fig. 9 and Fig.10 As shown, when the feeding mechanism 2 moves from the second position to the first position (i.e. Fig.10 The clamping mechanism 5 drives the electrode strip to the first position, and the clamping mechanism 5 switches from the loose state to the clamping state to clamp the electrode strip. The clamping mechanism 5 is in the clamping state and is located in front of the feeding mechanism 2, and clamps the electrode strip delivered by the feeding mechanism 2. Figure 8 and Fig.10 As shown, when the feeding mechanism 2 retreats to the second position, the clamping mechanism 5 maintains the clamping state, and the pole piece strip is drawn out from the feeding mechanism 2. After the feeding mechanism 2 moves to the second position, the feeding mechanism 2 is in the laying state, and at this time, all the pole piece strips are laid on the cutting platform 1.

[0088] This solution allows the cutting platform 1 to be fixedly arranged, and the feeding mechanism 2 to be reciprocatingly slidably arranged on the fixed platform 4, thereby realizing the relative movement between the cutting platform 1 and the feeding mechanism 2, thereby realizing that the feeding mechanism 2 automatically conveys the electrode sheet material strip to the cutting platform 1, and lays the electrode sheet material strip on the cutting platform 1. The volume of the feeding mechanism 2 is smaller than that of the cutting platform 1, and the movement of the feeding mechanism 2 is more flexible, and it does not occupy a large space due to its own movement.

[0089] Furthermore, the cutting mechanism 3 is movably arranged above the fixed platform 4. Among them, when the feeding mechanism 2 retreats to the second position, the cutting mechanism 3 moves along the conveying direction of the pole piece strip above the cutting platform 1, and cuts the pole piece strip into a plurality of pole pieces. In the process of cutting the pole piece strip by the cutting mechanism 3, the adsorption holes 11 on the cutting platform 1 continuously adsorb the pole piece strip to prevent the pole piece strip from shifting under the action of the cutting force. Under the premise that the cutting platform 1 is fixedly arranged, this solution makes it more convenient and efficient for the cutting mechanism 3 to cut the pole piece strip through the movable arrangement of the cutting mechanism 3.

[0090] It should be noted that Figure 7 Two feeding mechanisms 2 are shown in the figure, which is a schematic diagram of a feeding mechanism 2 being in two positions, wherein the feeding mechanism 2 at the rear side is in the first position, and the feeding mechanism 2 at the front side is in the second position. Figure 7 Two cutting mechanisms 3 are shown, which schematically illustrate two extreme positions of a cutting mechanism 3 during the cutting process. Figure 7 The content shown should not be understood as that there are two cutting mechanisms 3 and two feeding mechanisms 2 on the fixing table 4 .

[0091] The utility model also provides a pole piece manufacturing device, which comprises the pole piece cutting device mentioned above.

[0092] The utility model also provides a battery production line, which comprises the above-mentioned pole piece making device.

[0093] Note that in the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0094] The above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A pole piece cutting device, characterized in that: include: Cutting platform (1); A feeding mechanism (2), comprising a feeding roller (21) and a material receiving structure arranged upstream of the feeding roller (21), wherein the feeding roller (21) is arranged close to the upper surface of the cutting platform (1); A cutting mechanism (3) is arranged above the cutting platform (1) and located downstream of the feeding mechanism (2), and the cutting mechanism (3) is suitable for cutting the pole piece strip; Wherein, after the cutting mechanism (3) has cut the last pole piece, the material collection structure is suitable for driving the pole piece strip to move upstream of the unwinding roller (21) so as to recover the portion of the pole piece strip protruding from the unwinding roller (21).

2. The pole piece cutting device according to claim 1, characterized in that: The material receiving structure comprises: A main driving roller (22), the main driving roller (22) being arranged upstream of the unwinding roller (21), and the main driving roller (22) being capable of forward or reverse rotation; The first pressing roller (23) is movably arranged above the main driving roller (22), and the first pressing roller (23) moves closer to or away from the main driving roller (22) to press the pole piece strip onto the main driving roller (22).

3. The pole piece cutting device according to claim 2, characterized in that: The material receiving structure further comprises a linear drive member (24) and a mounting seat (25), the first pressing roller (23) is rotatably disposed on the mounting seat (25), and the mounting seat (25) is connected to the output end of the linear drive member (24).

4. The pole piece cutting device according to claim 2, characterized in that: The feeding mechanism (2) further comprises a feeding rack (26), wherein the feeding rack (26) comprises a bottom plate (261) and two side plates (262) respectively arranged on both sides of the bottom plate (261), and the main driving roller (22) and the unwinding roller (21) are both rotatably arranged on the two side plates (262).

5. The pole piece cutting device according to claim 4, characterized in that: The feeding rack also includes a support plate (263), which is arranged below the unloading roller (21) and is suitable for supporting the pole piece strip. A strip running gap is formed between the unloading roller (21) and the support plate (263), and the strip running gap is located downstream of the bottom plate (261). After the cutting mechanism (3) cuts the last pole piece, the material receiving structure makes the end of the pole piece strip flush with the front edge of the support plate (263) or located on the inner side of the front edge of the support plate (263).

6. The pole piece cutting device according to claim 5, characterized in that: A material clamping notch (264) is provided on the front side of the support plate (263).

7. The pole piece cutting device according to any one of claims 1 to 6, characterized in that: The feeding mechanism (2) further comprises a detection element, which is arranged downstream of the discharge roller (21) and close to the discharge roller (21).

8. The pole piece cutting device according to any one of claims 1 to 6, characterized in that: The feeding mechanism (2) further comprises a tension structure (27), wherein the tension structure (27) is arranged upstream of the unwinding roller (21), and the tension structure (27) comprises: Two transmission rollers (271), the two transmission rollers (271) are arranged at an interval, and the pole piece strip is transmitted on the upper surfaces of the two transmission rollers (271); The second pressing roller (272) is arranged between the two driving rollers (271) and is located above the pole piece strip. The second pressing roller (272) is movably arranged in the up and down directions to press the pole piece strip.

9. The pole piece cutting device according to claim 8, characterized in that: The tension structure (27) further comprises a torsion spring (273), one end of which is fixedly arranged, and the other end of which is connected to the second pressure roller (272), so that the torsion spring (273) applies a force toward the pole piece strip to the second pressure roller (272).

10. The pole piece cutting device according to any one of claims 1 to 6, characterized in that: The feeding mechanism (2) further comprises a buffer structure, which is arranged upstream of the unwinding roller (21), and is suitable for buffering the tail of the pole piece strip recovered by the unwinding roller (21).

11. The pole piece cutting device according to any one of claims 1 to 6, characterized in that: The cutting platform (1) and the feeding mechanism (2) are relatively movable, and the electrode cutting device further comprises a clamping mechanism (5), wherein the clamping mechanism (5) is arranged above the cutting platform (1), and during the relative movement of the cutting platform (1) and the feeding mechanism (2), the clamping mechanism (5) and the feeding mechanism (2) have a first position in which they are in a material receiving state after being close to each other, and a second position in which they are in a material spreading state after being away from each other; The clamping mechanism (5) has a clamping state and a loosening state. Before the clamping mechanism (5) moves to the first position relative to the feeding mechanism (2), the clamping mechanism (5) first switches to the loosening state. After the clamping mechanism (5) moves to the first position relative to the feeding mechanism (2), the clamping mechanism (5) is in the clamping state and fixes the electrode strip on the cutting platform (1). When the clamping mechanism (5) moves to the second position relative to the feeding mechanism (2), the clamping mechanism (5) maintains the clamping state.

12. The pole piece cutting device according to claim 11, characterized in that: It also comprises a fixed platform (4), the cutting platform (1) is arranged on the fixed platform (4) in a reciprocatingly slidable manner, the cutting platform (1) has the first position and the second position on the fixed platform (4), and the feeding mechanism (2) is fixedly arranged above the fixed platform (4); When the cutting platform (1) is in the first position, the clamping mechanism (5) is in the clamping state and is located in front of the feeding mechanism (2) and close to the feeding mechanism (2); during the process of the cutting platform (1) sliding from the first position to the second position, the clamping mechanism (5) maintains the clamping state, the pole piece strip is drawn out from the feeding mechanism (2) and moves synchronously with the cutting platform (1); when the cutting platform (1) moves to the second position, the clamping mechanism (5) is located at the second position.

13. The pole piece cutting device according to claim 11, characterized in that: It also comprises a fixed platform (4), the cutting platform (1) is fixedly arranged on the fixed platform (4), the feeding mechanism (2) is reciprocatingly slidably arranged on the fixed platform (4), and the feeding mechanism (2) has the first position and the second position on the fixed platform (4); When the feeding mechanism (2) moves from the second position to the first position, the feeding mechanism (2) drives the pole piece strip to the first position, and the clamping mechanism (5) switches from the loose state to the clamping state to clamp the pole piece strip. Then, during the process of the feeding mechanism (2) retreating to the second position, the clamping mechanism (5) maintains the clamping state, and the pole piece strip is drawn out from the feeding mechanism (2). After the feeding mechanism (2) moves to the second position, the feeding mechanism (2) is in the laying state, and lays the pole piece strip on the cutting platform (1).

14. The pole piece cutting device according to claim 12, characterized in that: The cutting mechanism (3) is movably arranged above the fixed platform (4); Wherein, after the cutting platform (1) moves from the first position to the second position, the cutting mechanism (3) moves along the conveying direction of the pole piece strip and cuts the pole piece strip into a plurality of pole pieces.

15. The pole piece cutting device according to claim 13, characterized in that: The cutting mechanism (3) is movably arranged above the fixed platform (4); Wherein, when the feeding mechanism (2) retracts to the first position, the cutting mechanism (3) moves above the cutting platform (1) along the conveying direction of the pole piece strip and cuts the pole piece strip into a plurality of pole pieces.

16. The pole piece cutting device according to claim 12, characterized in that: The cutting mechanism (3) is fixedly arranged above the fixing platform (4); In the process of the cutting platform (1) moving from the first position to the second position, the cutting platform (1) drives the pole piece strip to pass through the cutting mechanism (3), and the cutting mechanism (3) cuts the pole piece strip into a plurality of pole pieces.

17. The pole piece making device is characterized in that: It comprises the pole piece cutting device as described in any one of claims 1-16.

18. Battery production line, characterized in that, Including the pole piece making device as described in claim 17.

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