Pole piece cutting device

Abstract

The utility model relates to the technical field of batteries, and discloses a pole piece cutting device which comprises a driving assembly, an upper cutting assembly and a lower cutting assembly, the upper cutting assembly comprises a cutting upper die, a first pressing ring and a first elastic piece, and the cutting upper die is arranged on the driving assembly; the first pressing ring is arranged on the cutting upper die in a sleeving mode and elastically connected with the cutting upper die through a first elastic piece. The driving assembly is used for driving the upper cutting assembly to move in the direction close to the pole piece, when the first pressing ring abuts against the pole piece, the driving assembly continues to drive the upper cutting assembly to move, the first pressing ring is subjected to resistance to enable the first elastic piece to be compressed, and therefore the first pressing ring keeps abutting against the pole piece till the cutting upper die abuts against the pole piece. The lower cutting assembly comprises a cutting lower die, the driving assembly drives the cutting upper die to be close to the cutting lower die, so that the pole piece can be clamped between the cutting upper die and the cutting lower die, and the pole piece can be cut through cooperation of the cutting upper die and the cutting lower die. The pole piece cutting device has small damage to the pole piece and can improve the accuracy of a test result.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a pole piece cutting device. Background Art

[0002] With the wide application of lithium batteries, batteries produced from different process materials will experience different degrees of energy decline or safety problems when used in different environments. To analyze the reasons for the energy decline or safety problems, it is necessary to conduct failure analysis and detection on the batteries, so as to improve the process and enhance the battery performance. Before the failure analysis and detection, the batteries need to be disassembled, and the pole pieces after disassembly need to be processed.

[0003] According to different failure analysis and detection items, the processing methods of the pole pieces before detection are also different. When conducting reverse capacity analysis and detection, it is necessary to remove the battery materials with single-sided coating to completely expose the foil part, but there should be no rupture or crack in the foil. At present, most of the pole piece processing methods are manual, with low processing efficiency and easy damage to the pole pieces during processing, which affects the accuracy of the test results.

[0004] Therefore, there is an urgent need for a pole piece cutting device to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a pole piece cutting device, which can cut the pole pieces, has a high degree of automation, high processing efficiency, small damage to the pole pieces, and can improve the accuracy of battery test results.

[0006] As such a concept, the technical solution adopted by the utility model is as follows:

[0007] Provide a pole piece cutting device, characterized in that it includes a cutting mechanism, the cutting mechanism includes a driving component, an upper cutting component and a lower cutting component, the upper cutting component includes a cutting upper die, a first pressing ring and a first elastic member, the cutting upper die is arranged on the driving component, the first pressing ring is sleeved on the cutting upper die and elastically connected with the cutting upper die through the first elastic member; the lower cutting component includes a cutting lower die.

[0008] The driving component is used to drive the upper cutting component to move towards the direction close to the pole piece. When the first pressing ring abuts against the pole piece, the driving component continues to drive the upper cutting component to move, and the first pressing ring is subjected to resistance to compress the first elastic member, so that the first pressing ring keeps abutting against the pole piece until the cutting upper die abuts against the pole piece; under the drive of the driving component, the cutting upper die cooperates with the cutting lower die to cut the pole piece.

[0009] Optionally, the first elastic member includes an elastic element and a guide pin. The elastic element is sleeved on the guide pin, and two ends of the elastic element respectively abut against the first pressing ring and the cutting upper die.

[0010] The first end of the guide pin is connected to the first pressing ring, the second end of the guide pin is slidably connected to the cutting upper die, and the movement of the first pressing ring in the vertical direction can drive the guide pin to move relative to the cutting upper die.

[0011] Optionally, a stepped hole penetrating through both ends is provided on the cutting upper die. The second end is slidably disposed in the stepped hole, and the second end can abut against the stepped surface of the stepped hole. The stepped surface is used to limit the movement of the second end in the vertical direction towards the side of the first pressing ring.

[0012] Optionally, the cutting upper die includes a first section and a second section. An installation step is formed between the first section and the second section. The stepped hole is provided on the installation step and penetrates through the second section. The first pressing ring is sleeved outside the first section, and an installation hole is provided on the first pressing ring. The first end is connected in the installation hole.

[0013] Optionally, there is a gap between the first pressing ring and the cutting upper die in the radial direction of the cutting upper die to form an annular avoidance groove, and the annular avoidance groove is used to avoid the cutting lower die.

[0014] Optionally, the upper cutting assembly further includes a first guide ring and an upper die base. One end of the upper die base is connected to the first output shaft of the driving assembly, the other end of the upper die base is connected to the cutting upper die, the first guide ring is disposed on the driving assembly, the first guide ring is coaxially arranged with the upper die base and sleeved outside the upper die base, and the first guide ring is used to limit the upper die base to move only in the vertical direction.

[0015] Optionally, the driving assembly includes a first support frame and a cutting driving member. The cutting driving member is disposed on the first support frame, the cutting upper die is connected to the first output shaft of the cutting driving member, and the cutting driving member is used to drive the cutting upper die to move in the vertical direction; the first guide ring is disposed on the first support frame.

[0016] Optionally, the lower cutting assembly further includes a lower die base. The cutting lower die is disposed on the lower die base. A first material collecting hole is penetrated through the cutting lower die, and a second material collecting hole is penetrated through the lower die base. The first material collecting hole and the second material collecting hole are communicated.

[0017] Optionally, the cutting mechanism further includes a material receiving box, which is arranged below the lower cutting assembly and is used for collecting the pole pieces falling from the first material receiving hole and the second material receiving hole.

[0018] Optionally, the pole piece cutting device further includes a moving platform for supporting the pole piece. The cutting lower die is arranged below the cutting upper die, and the moving platform is located between the cutting upper die and the cutting lower die. Driven by the driving component, the cutting upper die can press at least part of the moving platform to move towards the cutting lower die side, so that the pole piece abuts against the cutting lower die.

[0019] The beneficial effects of the present utility model are as follows:

[0020] The pole piece cutting device proposed by the present utility model includes a cutting mechanism, which includes a driving component, an upper cutting assembly and a lower cutting assembly. The upper cutting assembly includes a cutting upper die, a first pressing ring and a first elastic member. The cutting upper die is arranged on the driving component, and the first pressing ring is sleeved on the cutting upper die and is elastically connected to the cutting upper die through the first elastic member. The driving component is used to drive the upper cutting assembly to move towards the pole piece. When the first pressing ring abuts against the pole piece, the driving component continues to drive the upper cutting assembly to move. The first pressing ring is subjected to resistance to compress the first elastic member, so that the first pressing ring remains in contact with the pole piece until the cutting upper die abuts against the pole piece. The lower cutting assembly includes a cutting lower die. The driving component drives the cutting upper die to approach the cutting lower die, so that the pole piece can be clamped between the cutting upper die and the cutting lower die, and the two cooperate to cut the pole piece. When the cutting mechanism cuts the pole piece, the elastic connection between the cutting upper die and the first pressing ring can avoid damaging the pole piece when the first pressing ring presses against the pole piece. Moreover, the cutting upper die and the cutting lower die cut the pole piece under the condition that the first pressing ring presses the pole piece, which can avoid the movement of the pole piece during the cutting process and ensure the cutting effect. The pole piece cutting device can be used to cut the sliced pieces that have been subjected to single-sided powder removal. The cut part of the pole piece can be used for reverse capacity analysis detection or other project analysis detections. It has a high degree of automation, high processing efficiency, and little damage to the pole piece, which can improve the accuracy of the test results of battery failure analysis. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the cutting mechanism provided by an embodiment of the present utility model;

[0022] Figure 2 is a cross-sectional view of the cutting mechanism provided by an embodiment of the present utility model;

[0023] Figure 3 is an exploded schematic structural diagram of the moving platform provided by an embodiment of the present utility model.

[0024] In the figure:

[0025] 1. Cutting mechanism; 11. Driving assembly; 111. First support frame; 112. Cutting driving member; 12. Upper cutting assembly; 121. Upper cutting die; 122. First pressing ring; 1221. Annular avoidance groove; 123. First elastic member; 1231. Elastic element; 1232. Guide pin; 124. First guide ring; 125. Upper die holder; 13. Lower cutting assembly; 131. Lower cutting die; 1311. First material collecting hole; 132. Lower die holder; 1321. Second material collecting hole;

[0026] 2. Moving platform; 21. Support plate; 211. Supporting groove; 212. Limit pin; 213. First through hole; 22. Mounting plate; 221. Second through hole; 222. Limit hole; 223. Activity groove; 23. Elastic support member;

[0027] 100. Pole piece. Specific embodiments

[0028] To make the technical problems solved by the present utility model, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the present utility model will be further described below with reference to the drawings and through specific embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all of them.

[0029] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above and over", and "on the top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below and under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature is at a lower horizontal height than the second feature.

[0031] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0032] The technical solution of the present utility model will be further described below in conjunction with the drawings and through specific embodiments.

[0033] As Figures 1 to 3 shown, this embodiment provides a pole piece cutting device, which includes a cutting mechanism 1. The cutting mechanism 1 includes a driving component 11, an upper cutting component 12 and a lower cutting component 13. The upper cutting component 12 includes a cutting upper die 121, a first pressing ring 122 and a first elastic member 123. The cutting upper die 121 is arranged on the driving component 11. The first pressing ring 122 is sleeved on the cutting upper die 121 and is elastically connected to the cutting upper die 121 through the first elastic member 123. The driving component 11 is used to drive the upper cutting component 12 to move towards the pole piece 100. When the first pressing ring 122 abuts against the pole piece 100, the driving component 11 continues to drive the upper cutting component 12 to move. The first pressing ring 122 is subjected to resistance to compress the first elastic member 123, so that the first pressing ring 122 remains in contact with the pole piece 100 until the cutting upper die 121 abuts against the pole piece 100. The lower cutting component 13 includes a cutting lower die 131. The driving component 11 drives the cutting upper die 121 to approach the cutting lower die 131, so that the pole piece 100 can be clamped between the cutting upper die 121 and the cutting lower die 131, and the two cooperate to cut the pole piece 100. When the cutting mechanism 1 cuts the pole piece 100, the elastic connection between the cutting upper die 121 and the first pressing ring 122 can avoid damaging the pole piece 100 when the first pressing ring 122 presses against the pole piece 100. Moreover, the cutting upper die 121 and the cutting lower die 131 cut the pole piece 100 under the condition that the first pressing ring 122 presses the pole piece 100, which can avoid the movement of the pole piece 100 during the cutting process and ensure the cutting effect.

[0034] It should be noted that the pole piece 100 includes a foil and active material layers coated on both sides of the foil. The active material powder (referred to as powder for short) is obtained by removing the active material layer on the surface of the foil. The pole piece cutting device provided in this embodiment can be used to cut the sliced pieces that have been subjected to single-sided powder removal to obtain circular single-sided pole pieces 100 as test samples to meet reverse capacity analysis testing or other projects. It has a high degree of automation, little damage to the pole piece 100, and can improve the accuracy of test results.

[0035] Optionally, the first elastic member 123 includes an elastic element 1231 and a guide pin 1232. The elastic element 1231 is sleeved on the guide pin 1232, and both ends of the elastic element 1231 respectively abut against the first pressure ring 122 and the cutting upper die 121. The first end of the guide pin 1232 is connected to the first pressure ring 122, and the second end of the guide pin 1232 is slidably connected to the cutting upper die 121. When the first pressure ring 122 moves in the vertical direction, it can drive the guide pin 1232 to move relative to the cutting upper die 121. When the first pressure ring 122 does not abut against the pole piece 100, the force exerted by the elastic element 1231 on the first pressure ring 122 and the cutting upper die 121 keeps a distance between the first pressure ring 122 and the cutting upper die 121 in the vertical direction. When the first pressure ring 122 abuts against the pole piece 100, the reaction force exerted by the pole piece 100 on the first pressure ring 122 causes the first pressure ring 122 to approach the cutting upper die 121 in the vertical direction. Since the first end of the guide pin 1232 is connected to the first pressure ring 122, when the first pressure ring 122 moves, it will drive the guide pin 1232 to move relative to the cutting upper die 121, that is, the distance between the cutting upper die 121 and the first pressure ring 122 in the vertical direction gradually decreases until the cutting upper die 121 also abuts against the pole piece 100.

[0036] In this embodiment, the sliding connection between the cutting upper die 121 and the guide pin 1232 is realized by a stepped hole provided on the cutting upper die 121, as Figure 2 shown. Both ends of the stepped hole are penetrated. When the guide pin 1232 slides through the stepped hole, the second end can abut against the stepped surface of the stepped hole, and this stepped surface is used to limit the guide pin 1232 from continuing to move towards the first pressure ring 122 side in the vertical direction. Specifically in implementation, the first end of the guide pin 1232 is integrally connected to the first pressure ring 122 by threading. When the guide pin 1232 moves away from the cutting upper die 121 side in the vertical direction, the guide pin 1232 can avoid the second end from disengaging from the stepped hole by abutting the second end against the stepped surface. When it is necessary to release the connection between the first pressure ring 122 and the cutting upper die 121, the threaded connection between the guide pin 1232 and the first pressure ring 122 can be released first, and then the guide pin 1232 can be taken out of the stepped hole from the end of the stepped hole away from the first pressure ring 122.

[0037] In this embodiment, the cutting upper die 121 includes a first section and a second section. The outer diameter of the first section is smaller than that of the second section. An installation step is formed between the first section and the second section. The stepped hole is provided on the installation step and penetrates the second section. The first pressure ring 122 is sleeved on the first section. An installation hole is provided on the first pressure ring 122, and an internal thread is provided in the installation hole. The first end of the guide pin 1232 penetrates through the installation hole to be threadedly connected to the first pressure ring 122. Optionally, one end of the elastic element 1231 penetrates through the installation hole, and the other end abuts against the installation step.

[0038] During specific implementation, when the cutting upper die 121 and the cutting lower die 131 cooperate to cut the pole piece 100, in order to avoid interference between the first pressing ring 122 and the cutting lower die 131 in terms of position, there is a gap between the first pressing ring 122 and the cutting upper die 121 in the radial direction of the cutting upper die 121 to form an annular avoidance groove 1221. When a part of the cutting upper die 121 penetrates into the first material receiving hole 1311, the annular side wall of the cutting lower die 131 extends into the annular avoidance groove 1221.

[0039] Optionally, the upper cutting assembly 12 further includes a first guiding ring 124 and an upper die base 125. One end of the upper die base 125 is connected to the first output shaft of the driving assembly 11, and the other end of the upper die base 125 is connected to the cutting upper die 121. The first guiding ring 124 is arranged on the driving assembly 11. The first guiding ring 124 is coaxially arranged with the upper die base 125 and penetrates through the upper die base 125. The first guiding ring 124 is used to limit the upper die base 125 to move only along the axial direction of the first guiding ring 124, and the axial direction of the first guiding ring 124 is the vertical direction. In this embodiment, a first annular outer edge is arranged at the end of the first guiding ring 124 away from the pole piece 100, and a first mounting hole is arranged on the first annular outer edge. Fixing parts such as fastening bolts can pass through the first mounting hole and be connected to the driving assembly 11 to realize the detachable connection between the first guiding ring 124 and the driving assembly 11.

[0040] Optionally, as Figure 1 shown, the driving assembly 11 includes a first support frame 111 and a cutting driving part 112. The cutting driving part 112 is arranged on the first support frame 111. The cutting upper die 121 is connected to the first output shaft of the cutting driving part 112. The cutting driving part 112 is used to drive the cutting upper die 121 to move in the vertical direction. The first guiding ring 124 is arranged on the first support frame 111. During specific implementation, the cutting driving part 112 is a driving cylinder. The driving cylinder is arranged above the first support frame 111, and the first output shaft of the driving cylinder passes through the first support frame 111 and is connected to the cutting upper die 121 located below the first support frame 111. In this embodiment, the first support frame 111 is of a U-shaped structure. The U-shaped structure includes two side parts and a top part located above the two side parts. The driving cylinder is fixed on the top part, and the cutting upper die 121 is located between the two side parts.

[0041] Optionally, as Figure 2As shown in the figure, the lower cutting assembly 13 further includes a lower die base 132. The cutting lower die 131 is disposed on the lower die base 132. A first material receiving hole 1311 is formed through the cutting lower die 131, and a second material receiving hole 1321 is formed through the lower die base 132. The first material receiving hole 1311 and the second material receiving hole 1321 are communicated. In a specific implementation, when the cutting upper die 121 cooperates with the cutting lower die 131 to cut the pole piece 100, the cut-off part of the pole piece 100 can be separated from between the cutting upper die 121 and the cutting lower die 131 through the first material receiving hole 1311 and the second material receiving hole 1321, without the need for manual sheet taking.

[0042] Further, as Figure 3 shown in the figure, the pole piece cutting device further includes a moving platform 2. The moving platform 2 includes a support plate 21, an elastic support member 23, and a mounting plate 22. The mounting plate 22 is connected to the support plate 21 through the elastic support member 23. The support plate 21 has a first surface and a second surface oppositely arranged in the vertical direction. The first surface is used to support the pole piece 100. A limit pin 212 is provided on the second surface. An activity groove 223 is provided on the mounting plate 22. A limit hole 222 is provided on the bottom wall of the activity groove 223. The support plate 21 is slidably disposed in the activity groove 223. The elastic support member 23 is sleeved on the limit pin 212. One end of the elastic support member 23 abuts against the support plate 21, and the other end abuts against the limit hole 222. When the upper cutting assembly 12 is not in contact with the pole piece 100, the limit pin 212 is inserted into the limit hole 222, and one end of the elastic support member 23 abuts against the support plate 21, and the other end abuts against the bottom wall of the limit hole 222, so as to maintain a distance between the limit pin 212 and the bottom of the limit hole 222. When the upper cutting assembly 12 abuts against the pole piece 100, the force applied by the upper cutting assembly 12 to the pole piece 100 will be transmitted to the support plate 21. At this time, the support plate 21 further squeezes the elastic support member 23, so that the limit pin 212 further moves toward the bottom wall of the limit hole 222, so that the support plate 21 can contact the bottom wall of the activity groove 223. The elastic connection between the mounting plate 22 and the support plate 21 can avoid damaging the pole piece 100 when the upper cutting assembly 12 abuts against the pole piece 100.

[0043] Optionally, a support groove 211 is provided on the support plate 21. The support groove 211 is used to place the pole piece 100 to prevent the pole piece 100 from moving during the pressing process, resulting in the deviation of the position to be cut on the pole piece 100.

[0044] Optionally, a first through hole 213 is provided through the groove wall of the carrier slot 211, and a second through hole 221 is provided through the groove wall of the movable slot 223. The second through hole 221 is used to avoid the cutting lower die 131, that is, when the moving platform 2 is located above the cutting lower die 131, the cutting lower die 131 passes through the second through hole 221. When the moving platform 2 is located below the cutting upper die 121, the cutting upper die 121 can move downward to abut against the pole piece 100, so that the support plate 21 supporting the pole piece 100 compresses the elastic support member 23, thereby causing the support plate 21 to move toward the side of the cutting lower die 131 until the cutting lower die 131 passes through the first through hole 213 and abuts against the lower surface of the pole piece 100, so that the pole piece 100 is clamped between the cutting upper die 121 and the cutting lower die 131, thereby realizing partial cutting of the pole piece 100, and the cut-off pole piece 100 can fall from the inside of the cutting lower die 131 through the first material receiving hole 1311 for easy collection.

[0045] In this embodiment, the part of the bottom wall of the movable slot 223 of the mounting plate 22 where the second through hole 221 is not provided is located below the top end of the cutting lower die 131, which enables the top end of the cutting lower die 131 to be located in the first through hole 213 when the support plate 21 abuts against the bottom wall of the movable slot 223. Preferably, when the cutting lower die 131 abuts against the pole piece 100, the top end of the cutting lower die 131 is flush with the bottom surface of the carrier slot 211, so that the pole piece 100 can be placed flat in the carrier slot 211.

[0046] Optionally, the pole piece cutting device further includes a support platform, and the moving platform 2 is slidably arranged on the support platform and is located above the cutting lower die 131.

[0047] Optionally, the pole piece cutting device further includes a material receiving box, and the material receiving box is located below the support platform and corresponds to the lower cutting assembly 13. The material receiving box is used to collect the pole pieces 100 falling from the first material receiving hole 1311 and the second material receiving hole 1321. A third material receiving hole is provided on the support platform. When the cutting upper die 121 and the cutting lower die 131 cut the pole piece 100, the cut-off pole piece 100 can sequentially pass through the first material receiving hole 1311 of the cutting lower die 131, the second material receiving hole 1321 of the lower die base 132, and the third material receiving hole of the support platform and fall into the material receiving box.

[0048] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. The pole piece cutting device is characterized in that, It includes a cutting mechanism (1), and the cutting mechanism (1) includes a driving component (11), an upper cutting component (12) and a lower cutting component (13). The upper cutting component (12) includes a cutting upper die (121), a first pressing ring (122) and a first elastic member (123). The cutting upper die (121) is arranged on the driving component (11). The first pressing ring (122) is sleeved on the cutting upper die (121) and is elastically connected to the cutting upper die (121) through the first elastic member (123). The lower cutting component (13) includes a cutting lower die (131). The driving component (11) is used to drive the upper cutting component (12) to move towards the direction close to the pole piece (100). When the first pressing ring (122) abuts against the pole piece (100), the driving component (11) continues to drive the upper cutting component (12) to move. The first pressing ring (122) is subjected to resistance to compress the first elastic member (123), so that the first pressing ring (122) keeps abutting against the pole piece (100) until the cutting upper die (121) abuts against the pole piece (100). Driven by the driving component (11), the cutting upper die (121) cooperates with the cutting lower die (131) to cut the pole piece (100).

2. The pole piece cutting device according to claim 1, wherein The first elastic member (123) includes an elastic element (1231) and a guide pin (1232). The elastic element (1231) is sleeved on the guide pin (1232), and two ends of the elastic element (1231) respectively abut against the first pressing ring (122) and the cutting upper die (121). The first end of the guide pin (1232) is connected to the first pressing ring (122), and the second end of the guide pin (1232) is slidably connected to the cutting upper die (121). The movement of the first pressing ring (122) in the vertical direction can drive the guide pin (1232) to move relative to the cutting upper die (121).

3. The pole piece cutting device according to claim 2, wherein, A stepped hole with both ends penetrating is arranged on the cutting upper die (121). The second end slidably penetrates into the stepped hole, and the second end can abut against the stepped surface of the stepped hole. The stepped surface is used to limit the movement of the second end in the vertical direction towards the side of the first pressing ring (122).

4. The pole piece cutting device according to claim 3, characterized in that, The cutting upper die (121) includes a first section and a second section. An installation step is formed between the first section and the second section. The stepped hole is arranged on the installation step and penetrates through the second section. The first pressing ring (122) is sleeved outside the first section, and an installation hole is arranged on the first pressing ring (122). The first end is connected in the installation hole.

5. The pole piece cutting device according to claim 1, characterized in that, The first pressing ring (122) and the cutting upper die (121) have a gap in the radial direction of the cutting upper die (121) to form an annular avoidance groove (1221). The cutting lower die (131) is used to be avoided in the annular avoidance groove (1221).

6. The pole piece cutting device according to claim 1, characterized in that, The upper cutting assembly (12) further includes a first guide ring (124) and an upper die holder (125). One end of the upper die holder (125) is connected to the first output shaft of the driving assembly (11), and the other end of the upper die holder (125) is connected to the cutting upper die (121). The first guide ring (124) is arranged on the driving assembly (11). The first guide ring (124) is coaxially arranged with the upper die holder (125) and sleeved outside the upper die holder (125). The first guide ring (124) is used to limit the upper die holder (125) to move only in the vertical direction.

7. The pole piece cutting device according to claim 6, wherein, The driving assembly (11) includes a first support frame (111) and a cutting driving member (112). The cutting driving member (112) is arranged on the first support frame (111). The cutting upper die (121) is connected to the first output shaft of the cutting driving member (112). The cutting driving member (112) is used to drive the cutting upper die (121) to move in the vertical direction; the first guide ring (124) is arranged on the first support frame (111).

8. The pole piece cutting device according to claim 1, characterized in that, The lower cutting assembly (13) further includes a lower die holder (132). The cutting lower die (131) is arranged on the lower die holder (132). A first material receiving hole (1311) is formed through the cutting lower die (131). A second material receiving hole (1321) is formed through the lower die holder (132). The first material receiving hole (1311) is communicated with the second material receiving hole (1321).

9. The pole piece cutting device according to claim 8, wherein, The cutting mechanism (1) further includes a material receiving box. The material receiving box is arranged below the lower cutting assembly (13). The material receiving box is used to collect the pole pieces (100) falling from the first material receiving hole (1311) and the second material receiving hole (1321).

10. The pole piece cutting device according to any one of claims 1 to 9, characterized in that, The pole piece cutting device further includes a moving platform (2). The moving platform (2) is used to support the pole piece (100). The cutting lower die (131) is arranged below the cutting upper die (121). The moving platform (2) is located between the cutting upper die (121) and the cutting lower die (131). Driven by the driving assembly (11), the cutting upper die (121) can press at least part of the moving platform (2) to move towards the cutting lower die (131) side, so that the pole piece (100) abuts against the cutting lower die (131).

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