Pole piece powder removing device

Abstract

The utility model relates to the technical field of batteries, and discloses a pole piece powder removing device which comprises a powder removing mechanism, the powder removing mechanism comprises a vertical moving assembly and a powder removing assembly, the powder removing assembly comprises a powder removing brush, a first pressing ring and a first elastic piece, and the powder removing brush is arranged on the vertical moving assembly; the first pressing ring is elastically connected with the vertical moving assembly through a first elastic piece and arranged outside the powder removing brush in a sleeving mode, the vertical moving assembly is used for driving the powder removing assembly to move in the direction close to the pole piece, when the first pressing ring abuts against the pole piece, the vertical moving assembly continues to drive the powder removing assembly to move, and the first pressing ring is subjected to resistance to enable the first elastic piece to be compressed; and the powder removing brush abuts against the pole piece. The first pressing ring is elastically connected with the vertical moving assembly, the pole piece can be prevented from being damaged when pressed, the powder removing brush removes powder on the pole piece in the first pressing ring, the pole piece can be prevented from moving, all removed powder can be left in the first pressing ring, collection is convenient, the ICP detection requirement is met, and the accuracy of the test result of battery failure analysis is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a device for removing powder from electrode sheets. 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 disassembled electrode sheets need to be processed.

[0003] According to different failure analysis and detection items, the processing methods of the electrode sheets before detection are also different. When conducting ICP (Inductively Coupled Plasma) detection, it is necessary to extract the battery material powder on the electrode sheets for detection. At present, most of the processing of the powder materials on the electrode sheets is manual, with low processing efficiency and the electrode sheets are easily damaged during processing, affecting the accuracy of the test results.

[0004] Therefore, there is an urgent need for a device for removing powder from electrode sheets to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a device for removing powder from electrode sheets, which can remove powder from the electrode sheets, has a high degree of automation, causes little damage to the electrode sheets, and can improve the accuracy of the test results of battery failure analysis.

[0006] With the above concept, the technical solution adopted by the utility model is as follows:

[0007] Provide a device for removing powder from electrode sheets, including a powder removal mechanism. The powder removal mechanism includes a vertical movement component and a powder removal component. The powder removal component includes a powder removal brush, a first pressing ring, and a first elastic member. The powder removal brush is arranged on the vertical movement component. The first pressing ring is elastically connected to the vertical movement component through the first elastic member and sleeved outside the powder removal brush;

[0008] The vertical movement component is used to drive the powder removal component to move towards the electrode sheet. When the first pressing ring abuts against the electrode sheet, the vertical movement component continues to drive the powder removal component to move. The first pressing ring is subjected to resistance, causing the first elastic member to compress, so that the first pressing ring remains in contact with the electrode sheet until the powder removal brush abuts against the electrode sheet;

[0009] The powder removal brush is used to remove powder from the electrode sheet.

[0010] Optionally, the powder removing assembly further includes a first guiding ring, which is arranged on the vertical moving assembly. The first pressing ring is coaxially arranged with the first guiding ring and penetrates through the first guiding ring. The first guiding ring is used to limit the first pressing ring to move only along the axial direction of the first guiding ring, and the axial direction of the first guiding ring is consistent with the moving direction of the powder removing assembly.

[0011] Optionally, the powder removing mechanism further includes a dust suction assembly, which is arranged on the vertical moving assembly and connected to the powder removing assembly. The dust suction assembly is used to collect the powder formed during powder removal.

[0012] Optionally, the dust suction assembly includes a dust suction pipe, a collection box, a vacuum pipe and a vacuum valve. One end of the dust suction pipe is connected to the first guiding ring, and the other end is connected to the collection box. One end of the vacuum pipe is connected to the collection box, and the other end is used to be connected to a vacuum pumping device. The vacuum valve is arranged on the vacuum pipe.

[0013] Optionally, a first aggregate hole is arranged on the side wall of the first guiding ring, and a second aggregate hole is arranged on the side wall of the first pressing ring. The second aggregate hole is communicated with the first aggregate hole. The dust suction pipe is communicated with the first aggregate hole and is located outside the first guiding ring. The dust suction pipe is used to suck the powder inside the first pressing ring.

[0014] Optionally, air holes are further arranged on the bottom side wall of the first pressing ring. When the first pressing ring abuts against the pole piece to form a closed cavity, the air holes are used to communicate the closed cavity with the external environment.

[0015] Optionally, the vertical moving assembly includes a first support frame, a vertical moving driving member and a mounting frame. The vertical moving driving member is arranged on the first support frame. The mounting frame is connected to the output shaft of the vertical moving driving member. The powder removing assembly is arranged on the mounting frame. The vertical moving driving member is used to drive the powder removing assembly to move in the vertical direction.

[0016] Optionally, the powder removing brush is arranged on the mounting frame, and two ends of the first elastic member respectively abut against the first pressing ring and the mounting frame.

[0017] Optionally, the powder removing brush includes a brush body and a rotation driving member. The rotation driving member is arranged on the vertical moving assembly. The brush body is arranged at the output end of the rotation driving member. The rotation driving member is used to drive the brush body to rotate.

[0018] Optionally, the pole piece dust removing device further includes a moving platform for supporting the pole piece. The dust removing mechanism further includes a support member disposed below the dust brush. The moving platform is located between the dust brush and the support member. Driven by the vertical movement assembly, the dust brush can press against at least a part of the moving platform and move towards the support member, so that the pole piece abuts against the support member.

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

[0020] The pole piece dust removing device proposed by the present utility model includes a dust removing mechanism, which includes a vertical movement assembly and a dust removing assembly. The dust removing assembly includes a dust brush, a first pressing ring and a first elastic member. The dust brush is disposed on the vertical movement assembly. The first pressing ring is elastically connected to the vertical movement assembly through the first elastic member and sleeved outside the dust brush. The vertical movement assembly is used to drive the dust removing assembly to move towards the pole piece. When the first pressing ring abuts against the pole piece, the vertical movement assembly continues to drive the dust removing assembly to move. The first pressing ring is subjected to resistance, causing the first elastic member to compress, so that the first pressing ring moves away from the pole piece until the dust brush abuts against the pole piece. The dust brush is used for removing dust from the pole piece. When the dust removing assembly presses against the pole piece, the elastic connection between the first pressing ring and the vertical movement assembly can prevent the pole piece from being damaged when pressed. The dust brush removes dust from the pole piece while the first pressing ring presses the pole piece, which can not only prevent the pole piece from moving during the dust removal process, but also keep all the removed powder in the first pressing ring, facilitating collection to meet the needs of ICP detection and improving the accuracy of the test results of battery failure analysis. Description of the Drawings

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

[0022] Figure 2 is a cross-sectional view of the dust removing 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. Dust removing mechanism; 11. Vertical movement assembly; 111. First support frame; 112. Vertical movement driving member; 113. Mounting frame; 12. Dust removing assembly; 121. Dust brush; 1211. Brush body; 1212. Rotation driving member; 122. First pressing ring; 1221. Second aggregate hole; 1222. Air hole; 123. First elastic member; 124. First guiding ring; 1241. First aggregate hole; 13. Support member; 14. Dust suction assembly; 141. Dust suction pipe; 142. Collection box; 143. Vacuum pipe; 144. Vacuum valve;

[0026] 2. Mobile platform; 21. Pallet; 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; 100. Pole piece. Detailed implementation manner

[0027] 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 implementation manners. 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 sake of convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all of them.

[0028] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should 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 communication inside two elements or the interaction relationship between two elements. 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 situations.

[0029] 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 the", and "on the" second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the", and "under the" second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0030] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and 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, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for differentiation in description and do not have special meanings.

[0031] The technical solutions of the present utility model will be further described below with reference to the drawings and through specific implementation manners.

[0032] As shown Figures 1 to 3 in the figure, this embodiment provides a powder removing device for a pole piece, which includes a powder removing mechanism 1. The powder removing mechanism 1 includes a vertical moving component 11 and a powder removing component 12. The powder removing component 12 includes a powder removing brush 121, a first pressing ring 122 and a first elastic member 123. The powder removing brush 121 is arranged on the vertical moving component 11. The first pressing ring 122 is elastically connected to the vertical moving component 11 through the first elastic member 123 and sleeved outside the powder removing brush 121. The vertical moving component 11 is used to drive the powder removing component 12 to move towards the pole piece 100. When the powder removing component 12 contacts the pole piece 100, the first pressing ring 122 contacts the pole piece 100 first. Since the first pressing ring 122 is elastically connected to the vertical moving component 11, when the first pressing ring 122 abuts against the pole piece 100, if the vertical moving component 11 continues to drive the powder removing component 12 to move, the first pressing ring 122 is resisted, causing the first elastic member 123 to be compressed, so that the powder removing brush 121 continues to move towards the pole piece 100 until the powder removing brush 121 abuts against the pole piece 100. The powder removing brush 121 is used to remove powder from the pole piece 100. When the powder removing component 12 presses against the pole piece 100, the elastic connection between the first pressing ring 122 and the vertical moving component 11 can prevent the pole piece 100 from being damaged when pressed. And the powder removing brush 121 removes powder from the pole piece 100 when the first pressing ring 122 presses the pole piece 100, which can not only prevent the pole piece 100 from moving during the powder removing process, but also leave all the removed powder in the first pressing ring 122, facilitating collection to meet the needs of ICP detection.

[0033] It should be noted that the pole piece 100 includes a foil and active material layers coated on both sides of the foil. Powder removing means removing the active material layer on the surface of the foil to obtain active material powder (abbreviated as powder). In this embodiment, the pre-treatment method of the pole piece is to use the powder removing device for the pole piece to remove the local active material layer on one side of the current collector. When removing powder, powder will be formed, and for the pole piece with the foil partially exposed on one side, the powder formed during powder removing is used as a detection sample to meet the needs of ICP detection or other projects.

[0034] Optionally, the dust removal assembly 12 further includes a first guiding ring 124. The first guiding ring 124 is disposed on the vertical moving assembly 11. The first pressing ring 122 is coaxially arranged with the first guiding ring 124 and passes through the first guiding ring 124. The first guiding ring 124 is used to limit the first pressing ring 122 to move only along the axial direction of the first guiding ring 124, and the axial direction of the first guiding ring 124 is consistent with the moving direction of the dust removal assembly 12. In this embodiment, the first elastic member 123 is a spring. An installation groove is provided at one end of the first pressing ring 122 away from the pole piece 100. One end of the spring is fixed in the installation groove, and the other end is connected to the vertical moving assembly 11, that is, both ends of the first elastic member 123 are respectively abutted against the first pressing ring 122 and the vertical moving assembly 11. There are at least two groups of springs, and the two groups of springs are symmetrically arranged in the radial direction of the first pressing ring 122 to ensure the stable connection between the first pressing ring 122 and the vertical moving assembly 11. In this embodiment, a first annular outer edge is provided at one end of the first guiding ring 124 away from the pole piece 100, and a first installation hole is provided on the first annular outer edge. Fixing members such as fastening bolts can be used to pass through the first installation hole and be connected to the vertical moving assembly 11 to realize the detachable connection between the first guiding ring 124 and the vertical moving assembly 11.

[0035] Optionally, the dust removal mechanism 1 further includes a dust suction assembly 14. The dust suction assembly 14 is disposed on the vertical moving assembly 11 and is connected to the dust removal assembly 12. The dust suction assembly 14 is used to collect the powder formed during dust removal to realize the collection of the powder for ICP detection, and the removed powder is all sucked away, which can also avoid the influence of the powder on the next operation of the pole piece 100.

[0036] Preferably, the dust suction assembly 14 includes a dust suction pipe 141, a collection box 142, a vacuum pipe 143, and a vacuum valve 144 connected in sequence. One end of the dust suction pipe 141 is connected to the first guiding ring 124, and the other end is connected to the collection box 142. One end of the vacuum pipe 143 is connected to the collection box 142, and the other end is used to be connected to a vacuum pumping device. The vacuum valve 144 is disposed on the vacuum pipe 143. When it is necessary to collect the powder in the first pressing ring 122, the vacuum pumping device can be turned on and the vacuum valve 144 can be opened. The gas in the first pressing ring 122 is sucked through the vacuum pipe 143 and the dust suction pipe 141, so that the gas entrains the powder and is sucked into the collection box 142 through the dust suction pipe 141 to complete the collection of the powder.

[0037] When performing ICP detection, it is necessary to manually disconnect the connection between the collection box 142, the dust suction pipe 141, and the vacuum pipe 143 to remove the collection box 142 and perform failure analysis and detection on the powder of the battery electrodes collected inside. To avoid affecting the next electrode processing, there are multiple collection boxes 142 that can be used alternately. At the same time, the top cover and bottom cover of the collection box 142 are both simple threaded sealing covers, which are convenient for disassembly, cleaning, ultrasonic cleaning, and drying. At the same time, the cylinder body of the collection box 142 is made of transparent PVC material, and the powder collection situation during the operation of the electrode processing equipment can be directly observed.

[0038] Optionally, a first aggregate hole 1241 is further provided on the side wall of the first guide ring 124, a second aggregate hole 1221 is provided on the side wall of the first pressing ring 122, the second aggregate hole 1221 communicates with the first aggregate hole 1241, and the dust suction pipe 141 communicates with the first aggregate hole 1241 and is located outside the first guide ring 124. The dust suction pipe 141 is used to suck the powder inside the first pressing ring 122. In specific implementation, the first pressing ring 122 is used to press and fix the electrode 100, and then the powder brush 121 inside the first pressing ring 122 is used to remove the powder coated on the electrode 100, so that the removed powder on the electrode 100 is all located inside the first pressing ring 122. At this time, the dust suction assembly 14 is used to suck the powder inside the first pressing ring 122, and the powder can be sucked away through the first aggregate hole 1241 and the second aggregate hole 1221.

[0039] Preferably, an air hole 1222 is further provided on the bottom side wall of the first pressing ring 122. The air hole 1222 communicates with the second aggregate hole 1221 and is located on the side of the second aggregate hole 1221 close to the electrode 100. When the first pressing ring 122 abuts against the electrode 100, a closed cavity is formed between the first pressing ring 122 and the electrode 100, and the closed cavity communicates with the second aggregate hole 1221. The air hole 1222 is used to communicate the closed cavity with the external environment. When the vacuum device and the vacuum valve 144 are opened to suck the powder inside the first pressing ring 122, the gas in the external environment can enter the closed cavity through the air hole 1222, so that the powder in the closed cavity can be continuously sucked away.

[0040] Optionally, the vertical movement assembly 11 includes a first support frame 111, a vertical movement driving member 112, and a mounting frame 113. The vertical movement driving member 112 is arranged on the first support frame 111, the mounting frame 113 is connected to the output shaft of the vertical movement driving member 112, and the powder removal assembly 12 is arranged on the mounting frame 113. The vertical movement driving member 112 is used to drive the powder removal assembly 12 to move in the vertical direction.

[0041] Preferably, the first guide ring 124 is arranged on the mounting frame 113. The two ends of the first elastic member 123 respectively abut against the first pressing ring 122 and the mounting frame 113, and the powder brush 121 is arranged on the mounting frame 113.

[0042] Optionally, in addition to the dust removal brush 121 including a brush body 1211 and a rotary driving member 1212, the rotary driving member 1212 is arranged on the mounting bracket 113 of the vertical moving assembly 11, the brush body 1211 is arranged at the output end of the rotary driving member 1212, and the rotary driving member 1212 is used to drive the brush body 1211 to rotate. During specific implementation, the rotary driving member 1212 can be set with a fixed duration for single operation. After the dust removal brush 121 performs dust removal on the pole piece 100 for a fixed duration, it is defaulted that the dust removal operation of the pole piece 100 ends.

[0043] Furthermore, the pole piece dust removal device further includes a control device. A position sensor is arranged on the vertical moving assembly 11, and the position sensor is used to detect the position of the dust removal brush 121. The control device, the position sensor, the vertical moving driving member 112 and the rotary driving member 1212 are signal-connected. During specific implementation, during the process of the dust removal assembly 12 approaching the pole piece 100, the dust removal brush 121 will move upward in the vertical direction, and the position sensor is used to detect whether the dust removal brush 121 has moved to a preset position. When the position sensor detects that the brush body 1211 of the dust removal brush 121 has moved to the preset position, the position sensor will send a first signal to the control device. After receiving the first signal, the control device will control the vertical moving driving member 112 to stop working and the rotary driving member 1212 to start working. After the rotary driving member 1212 works for a fixed duration, it will stop working. After receiving the second signal that the rotary driving member 1212 stops working, the control device will control the vertical moving driving member 112 to drive the dust removal assembly 12 away from the pole piece 100.

[0044] Even further, the pole piece dust removal device further includes a moving platform 2, and the pallet 21 is used to support the pole piece 100. The moving platform 2 includes a pallet 21 and an elastic support member 23, and the elastic support member 23 is used to support the pallet 21 and enable the pallet 21 to move in the vertical direction. When the dust removal assembly 12 presses against the pole piece 100, since the pallet 21 is supported by the elastic support member 23, when the pressing force received by the pole piece 100 is transmitted to the pallet 21, the pallet 21 will further compress the elastic support member 23. The pallet 21 can provide further buffering when the pole piece 100 is pressed, so as to effectively avoid damage to the pole piece 100 when it is pressed.

[0045] Optionally, a receiving groove 211 is arranged on the pallet 21, and the receiving 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 dusted on the pole piece 100.

[0046] Optionally, the mobile platform 2 further includes a mounting plate 22. The pallet 21 has a first surface and a second surface oppositely arranged in the vertical direction. The first surface is used to support the electrode plate 100, and a limit pin 212 is arranged on the second surface. An activity slot 223 is arranged on the mounting plate 22, and a limit hole 222 is arranged on the bottom wall of the activity slot 223. The pallet 21 is slidably arranged in the activity slot 223. The elastic support member 23 is sleeved on the limit pin 212. One end of the elastic support member 23 abuts against the pallet 21, and the other end abuts against the limit hole 222. When the powder removing assembly 12 is not in contact with the electrode plate 100, the limit pin 212 is inserted into the limit hole 222, and one end of the elastic support member 23 abuts against the pallet 21, and the other end abuts against the bottom wall of the limit hole 222, so as to keep a distance between the limit pin 212 and the bottom of the limit hole 222. When the powder removing assembly 12 abuts against the electrode plate 100, the force applied by the powder removing assembly 12 to the electrode plate 100 will be transmitted to the pallet 21. At this time, the pallet 21 further presses the elastic support member 23, so that the limit pin 212 further moves towards the bottom wall of the limit hole 222, enabling the pallet 21 to contact the bottom wall of the activity slot 223. The elastic connection between the mounting plate 22 and the pallet 21 can avoid damaging the electrode plate 100 when the powder removing assembly 12 abuts against the electrode plate 100.

[0047] Optionally, the powder removing mechanism 1 further includes a support member 13. The support member 13 is arranged below the powder removing brush 121. The mobile platform 2 is located between the powder removing brush 121 and the support member 13. The support member 13 can extend into the mobile platform 2, and the powder removing brush 121 can press the electrode plate 100 against the support member 13. Specifically in implementation, the powder removing mechanism 1 further includes a support guide rail. The mobile platform 2 is slidably arranged on the support guide rail to be located above the support member 13. When the mobile platform 2 is located below the powder removing brush 121, the support member 13 passes through the second through hole 221 and is located below the first through hole 213, and the powder removing brush 121 can press at least part of the electrode plate 100 to move the pallet 21 towards the support member 13 side, so that the support member 13 can pass through the first through hole 213 again, and the lower surface of the electrode plate 100 abuts against the support member 13. In this way, the support member 13 can support the part of the electrode plate 100 located in the first through hole 213, avoiding the part of the electrode plate 100 located in the first through hole 213 from being bent when pressed by the powder removing brush 121, and ensuring that the electrode plate 100 is not damaged during the powder removing process.

[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 electrode sheet dust removal device is characterized in that, It includes a powder removing mechanism (1), and the powder removing mechanism (1) includes a vertical movement component (11) and a powder removing component (12). The powder removing component (12) includes a powder removing brush (121), a first pressing ring (122) and a first elastic member (123). The powder removing brush (121) is arranged on the vertical movement component (11). The first pressing ring (122) is elastically connected to the vertical movement component (11) through the first elastic member (123) and sleeved outside the powder removing brush (121). The vertical movement component (11) is used to drive the powder removing component (12) to move towards the pole piece (100). When the first pressing ring (122) abuts against the pole piece (100), the vertical movement component (11) continues to drive the powder removing 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 abutment with the pole piece (100) until the powder removing brush (121) abuts against the pole piece (100). The powder removing brush (121) is used to remove powder from the pole piece (100).

2. The dust removing device for the pole piece according to claim 1, wherein, The powder removing component (12) further includes a first guiding ring (124). The first guiding ring (124) is arranged on the vertical movement component (11). The first pressing ring (122) is coaxially arranged with the first guiding ring (124) and penetrates through the first guiding ring (124). The first guiding ring (124) is used to limit the first pressing ring (122) to move only along the axial direction of the first guiding ring (124), and the axial direction of the first guiding ring (124) is consistent with the moving direction of the powder removing component (12).

3. The electrode sheet dust removal device according to claim 2, wherein The powder removing mechanism (1) further includes a dust suction component (14). The dust suction component (14) is arranged on the vertical movement component (11) and connected to the powder removing component (12). The dust suction component (14) is used to collect the powder formed during powder removal.

4. The electrode sheet dust removal device according to claim 3, characterized in that, The dust suction component (14) includes a dust suction pipe (141), a collection box (142), a vacuum pipe (143) and a vacuum valve (144). One end of the dust suction pipe (141) is connected to the first guiding ring (124), and the other end is connected to the collection box (142). One end of the vacuum pipe (143) is connected to the collection box (142), and the other end is used to be connected to a vacuum pumping device. The vacuum valve (144) is arranged on the vacuum pipe (143).

5. The electrode sheet dust removal device according to claim 4, wherein, A first aggregate hole (1241) is arranged on the side wall of the first guiding ring (124), and a second aggregate hole (1221) is arranged on the side wall of the first pressing ring (122). The second aggregate hole (1221) is communicated with the first aggregate hole (1241). The dust suction pipe (141) is communicated with the first aggregate hole (1241) and is located outside the first guiding ring (124). The dust suction pipe (141) is used to suck the powder inside the first pressing ring (122).

6. The electrode sheet dust removal device according to claim 5, characterized in that, The bottom side wall of the first pressing ring (122) is further provided with air holes (1222). When the first pressing ring (122) abuts against the electrode sheet (100) to enclose a closed cavity, the air holes (1222) are used to communicate the closed cavity with the external environment.

7. The dust removal device for the electrode sheet according to any one of claims 1 to 6, characterized in that, The vertical movement assembly (11) includes a first support frame (111), a vertical movement driving member (112) and a mounting frame (113). The vertical movement driving member (112) is arranged on the first support frame (111), the mounting frame (113) is connected to the output shaft of the vertical movement driving member (112), the dust removing assembly (12) is arranged on the mounting frame (113), and the vertical movement driving member (112) is used to drive the dust removing assembly (12) to move in the vertical direction.

8. The dust removal device for the pole piece according to claim 7, wherein, The dust removing brush (121) is arranged on the mounting frame (113), and two ends of the first elastic member (123) respectively abut against the first pressing ring (122) and the mounting frame (113).

9. The dust removing device for the electrode sheet according to any one of claims 1 to 6, characterized in that, The dust removing brush (121) includes a brush body (1211) and a rotation driving member (1212). The rotation driving member (1212) is arranged on the vertical movement assembly (11), the brush body (1211) is arranged at the output end of the rotation driving member (1212), and the rotation driving member (1212) is used to drive the brush body (1211) to rotate.

10. The dust removing device for the electrode sheet according to any one of claims 1 to 6, characterized in that, The electrode sheet dust removing device further includes a moving platform (2). The moving platform (2) is used to support the electrode sheet (100). The dust removing mechanism (1) further includes a support member (13). The support member (13) is arranged below the dust removing brush (121). The moving platform (2) is located between the dust removing brush (121) and the support member (13). Driven by the vertical movement assembly (11), the dust removing brush (121) can press at least part of the moving platform (2) to move towards the support member (13) side, so that the electrode sheet (100) abuts against the support member (13).

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