A pole piece cutting device

Abstract

The present application discloses a pole piece cutting device, which includes a pole piece feeding part, a pole piece slitting part and a pole piece punching part, wherein: the pole piece feeding part is used to release the pole piece in the coil, and the pole piece includes a metal layer and a dressing layer disposed at intervals on the metal layer; the pole piece slitting part is located behind the pole piece feeding part and is configured to slit the pole piece along the conveying direction of the pole piece; the pole piece punching part includes a first punching mechanism and a positioning mechanism, the positioning mechanism is configured to position the position information of the area to be punched of the pole piece, and the first punching mechanism punches the pole piece on the area to be punched according to the position information to form pole tabs. The present application provides a pole piece with a dressing layer at intervals, slits this kind of pole piece along the conveying direction of the pole piece through the pole piece slitting part, and punches out pole tabs through the pole piece punching part, so that multiple standard pole pieces can be cut at the same time, improving the cutting efficiency of the pole piece, thereby improving the production efficiency of the pole piece.

Description

Technical Field

[0001] The present invention relates to a sheet making machine in lithium battery production equipment, and more particularly to a pole piece cutting device. Background Art

[0002] During the production process of the sheet making machine, it is necessary to cut a roll of pole pieces into individual pole pieces, and then cut the ear tabs and V-corners from the individual pole pieces.

[0003] The cutting direction of the traditional sheet making machine is perpendicular to the conveying direction of the pole piece. The pole piece is conveyed in a step-by-step manner. Each time, a single pole piece is cut out first, then an ear tab is cut from one end of this pole piece, and then the V-corner is cut. This method results in low production efficiency of the pole piece due to the low cutting efficiency of the pole piece. Summary of the Invention

[0004] The present invention aims at the problem of low production efficiency of existing pole pieces and provides a pole piece cutting device that can improve the cutting efficiency of pole pieces.

[0005] The object of the present invention is achieved by the following technical solutions:

[0006] The present invention provides a pole piece cutting device, including a pole piece feeding part, a pole piece slitting part, and a pole piece punching part. Among them: the pole piece feeding part includes a pole piece unwinding mechanism configured to release the pole piece from the material roll. The pole piece includes a metal layer and a dressing layer disposed at intervals on the metal layer. Each section of the dressing layer includes dressing layers symmetrically disposed on the upper and lower surfaces of the metal layer. The length of each section of the dressing layer is the length of a standard pole piece, and the length direction of each section of the dressing layer is the same as the conveying direction of the pole piece; the pole piece slitting part is located at the subsequent working station of the pole piece feeding part. The pole piece slitting part includes at least one cutting knife configured to slit the pole piece along the conveying direction of the pole piece; the pole piece punching part includes a first punching mechanism and a positioning mechanism. The positioning mechanism is configured to position the position information of the area to be punched on the pole piece. The first punching mechanism punches the pole piece in the area to be punched according to the position information to form an ear tab. The area to be punched on the pole piece is located at the metal layer where the dressing layer is not laid.

[0007] By providing a pole piece with spaced dressing layers, this pole piece is slit along the conveying direction of the pole piece by the pole piece slitting part, and the ear tab is punched out by the pole piece punching part. At the same time, multiple standard pole pieces can be cut, improving the cutting efficiency of the pole piece and thus the production efficiency of the pole piece.

[0008] Optionally, the pole piece punching part further includes a second punching mechanism configured to punch a V-corner on the pole piece. The second punching mechanism punches the pole piece in the area to be punched according to the position information to form a V-corner.

[0009] By setting up the second punching mechanism to punch a V-angle on the pole piece, it meets the process requirements and improves the competitiveness of the equipment.

[0010] Optionally, the pole piece punching part further includes a first adjustment mechanism. The first punching mechanism is fixedly installed on the first adjustment mechanism, and the first adjustment mechanism is configured to drive the first punching mechanism to move in the first horizontal direction and / or the second horizontal direction according to the position information; and / or, the pole piece punching part further includes a second adjustment mechanism. The second punching mechanism is fixedly installed on the second adjustment mechanism, and the second adjustment mechanism is configured to drive the second punching mechanism to move in the first horizontal direction and / or the second horizontal direction according to the position information; wherein, the first horizontal direction and the second horizontal direction are perpendicular to each other.

[0011] By setting up the first adjustment mechanism to adjust the position of the first punching mechanism and the second adjustment mechanism to adjust the position of the second punching mechanism, the punching accuracy of the pole piece punching part for the pole piece is improved.

[0012] Optionally, the pole piece slitting part is arranged at the subsequent process of the pole piece punching part. The pole piece punching part is configured to punch the pole piece into a pole piece group with at least two pole tabs; the pole piece slitting part is configured to slit the pole piece group into at least two pole pieces with a standard width.

[0013] First, the pole piece punching part punches the pole piece into a pole piece group with at least two pole tabs, and then the pole piece slitting part slits the pole piece group into at least two pole pieces with a standard width, which improves the pole piece cutting efficiency.

[0014] Optionally, the pole piece slitting part is arranged at the previous process of the pole piece punching part. The pole piece slitting part is configured to slit the pole piece into at least two groups of parallel pole piece strips; the pole piece punching part is configured to punch the pole piece strips into pole pieces with a standard length with pole tabs.

[0015] First, the pole piece slitting part slits the pole piece into at least two groups of parallel pole piece strips, and then the pole piece punching part punches the pole piece strips into pole pieces with a standard length with pole tabs, which improves the pole piece cutting efficiency.

[0016] Optionally, the pole piece punching part is configured to be at least two groups. The pole piece cutting device further includes a shunting part. The shunting part is arranged between the pole piece slitting part and the pole piece punching part, and the shunting part is configured to shunt and convey the pole piece strips obtained by the pole piece slitting part to at least two groups of pole piece punching parts for punching treatment.

[0017] By setting up the shunting part to shunt and convey the pole piece strips to at least two groups of pole piece punching parts for punching treatment, the production efficiency is improved.

[0018] Optionally, the first punching mechanism includes a first lifting component and a first punching plate. The movable end of the first lifting component is fixedly connected to the first punching plate, and the first lifting component is configured to drive the first punching plate to move up and down. At least two groups of first knife grooves corresponding to the tabs are arranged on the first punching plate.

[0019] By providing at least two groups of first knife grooves corresponding to the tabs, the function of simultaneously punching out multiple tabs is realized, improving the efficiency of pole piece cutting.

[0020] Optionally, the second punching mechanism includes a second lifting component and a second punching plate. The movable end of the second lifting component is fixedly connected to the second punching plate, and the second lifting component is configured to drive the second punching plate to move up and down. At least three groups of second knife grooves corresponding to the V-shaped corners are arranged on the second punching plate.

[0021] By providing at least three groups of second knife grooves corresponding to the V-shaped corners, the function of simultaneously punching out multiple V-shaped corners is realized, improving the efficiency of pole piece cutting.

[0022] Optionally, there are at least two cutting knives in the pole piece slitting section, and the distance between adjacent two cutting knives is configured to be the width of a standard pole piece.

[0023] By providing at least two cutting knives and setting the distance between adjacent two cutting knives to be the width of a standard pole piece, it is ensured that the widths of the cut pole pieces are consistent and the efficiency of pole piece cutting is improved.

[0024] Optionally, the pole piece slitting section further includes a pressing mechanism. The pressing mechanism includes an upper pressing component and a lower pressing component symmetrically arranged. Both the upper pressing component and the lower pressing component are provided with slots for the cutting knives to pass through, and the upper pressing component and the lower pressing component are configured to press and convey the pole piece.

[0025] By means of the pressing mechanism provided with slots for the cutting knives to pass through, the pole piece is pressed and conveyed during the process of the cutting knives slitting the pole piece, ensuring the accuracy and stability of pole piece slitting.

[0026] Optionally, the pole piece feeding section further includes a tension control mechanism and a pole piece buffer mechanism. The tension control mechanism is configured to adjust the tension of the pole piece during conveying; the pole piece buffer mechanism is configured to buffer the pole piece to keep the pole piece under a certain tension.

[0027] By providing the tension control mechanism and the pole piece buffer mechanism, the stability and continuity of pole piece conveying are improved.

[0028] Optionally, the pole piece cutting device further includes an edge detection section. The edge detection section is arranged at the back of the pole piece slitting section and is configured to continuously detect the edges of the pole pieces after being slit by the pole piece slitting section.

[0029] By setting up an edge detection unit, the slitting quality of the electrode sheet is detected in real time, the occurrence of rework is reduced, and the cutting quality of the electrode sheet is improved.

[0030] It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present invention and used together with the specification to explain the principles of the present invention.

[0032] Figure 1 It is a schematic three-dimensional structure diagram of an electrode sheet cutting device in the present invention.

[0033] Figure 2 For Figure 1 the structure diagram of the electrode sheet provided by the electrode sheet feeding part in

[0034] Figure 3 For Figure 1 the schematic diagram of the slitting position of the electrode sheet by the electrode sheet slitting part in

[0035] Figure 4 For Figure 1 the schematic diagram of the punching position and punching shape of the electrode sheet by the electrode sheet punching part in

[0036] Figure 5 For Figure 4 the schematic diagram of the shape of the V-angle in

[0037] Figure 6 It is a schematic three-dimensional structure diagram of an electrode sheet cutting device in another embodiment of the present invention.

[0038] Figures 1 to 6 In DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The following will describe in detail the exemplary embodiments, which are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0040] In view of the problem of low production efficiency of existing electrode sheets, the present application provides an electrode sheet cutting device that can improve the cutting efficiency of electrode sheets. The following will be combined with Figures 1 to 6 to illustrate the structure of the electrode sheet cutting device by way of example.

[0041] As an alternative implementation, as Figures 1 to 5 shown, the electrode sheet 10 in the electrode sheet reel includes a metal layer 12 and a dressing layer 11 disposed at intervals on the metal layer 12. Each section of the dressing layer 11 includes a dressing layer 11 symmetrically disposed on the upper and lower surfaces of the metal layer 12. The length of each section of the dressing layer 11 is the length of a standard electrode sheet, and the length direction of each section of the dressing layer 11 is the same as the conveying direction of the electrode sheet 10.

[0042] The present invention provides an electrode sheet cutting device for cutting the electrode sheet 10 in the electrode sheet reel to finally form an electrode sheet with a standard length with an electrode tab 14.

[0043] The electrode sheet cutting device includes an electrode sheet feeding part 20, an electrode sheet slitting part 30 and an electrode sheet punching part 40.

[0044] The electrode sheet feeding part 20 includes an electrode sheet unwinding mechanism 21, and the electrode sheet unwinding mechanism 21 is configured to release the electrode sheet 10 in the reel.

[0045] The electrode sheet slitting part 30 is located at the subsequent working station of the electrode sheet feeding part 20. The electrode sheet slitting part 30 includes at least one cutting knife, and the cutting knife is configured to slit the electrode sheet 10 along the conveying track 13 in the conveying direction of the electrode sheet 10.

[0046] The electrode sheet punching part 40 includes a first punching mechanism 41 and a positioning mechanism 43. The positioning mechanism 43 is configured to position the position information of the area to be punched on the electrode sheet 10. The first punching mechanism 41 punches the electrode sheet 10 in the area to be punched according to the position information to form an electrode tab 14. The area to be punched on the electrode sheet 10 is located at the metal layer 12 where the dressing layer is not laid. As Figure 4 shown, when the first punching mechanism 41 punches, it may cut a part of the dressing layer 11 around the metal layer 12.

[0047] As an implementable implementation, the electrode sheet punching part 40 further includes a second punching mechanism 42. The second punching mechanism 42 is configured to punch a V-angle 15 on the electrode sheet 10. The second punching mechanism 42 punches the electrode sheet 10 in the area to be punched according to the position information provided by the positioning mechanism 43 to form a V-angle 15. As Figure 4As shown, the punching positions of the first punching mechanism 41 and the second punching mechanism 42 are both located on the metal layer 12 of the pole piece 10. The second punching mechanism 42 first punches out the V-shaped corners 15, and then the first punching mechanism 41 punches out the tabs 14 while punching the pole piece into pole pieces of standard length. The positions of the V-shaped corners 15 are located at the four diagonals of each standard pole piece, and the positions of the tabs 16 are near the midline of one of the short sides of each standard pole piece.

[0048] Optionally, the pole piece punching part 40 further includes a first adjustment mechanism. The first punching mechanism 41 is fixedly installed on the first adjustment mechanism, and the first adjustment mechanism is configured to drive the first punching mechanism 41 to move in the first horizontal direction and / or the second horizontal direction according to the position information, wherein the first horizontal direction and the second horizontal direction are perpendicular to each other. Optionally, the first adjustment mechanism drives the first punching mechanism to adjust the position in the front-back, left-right directions through a motor.

[0049] Optionally, the pole piece punching part 40 further includes a second adjustment mechanism. The second punching mechanism 42 is fixedly installed on the second adjustment mechanism, and the second adjustment mechanism is configured to drive the second punching mechanism 42 to move in the first horizontal direction and / or the second horizontal direction according to the position information, wherein the first horizontal direction and the second horizontal direction are perpendicular to each other. Optionally, the second adjustment mechanism drives the first punching mechanism 41 to adjust the position in the front-back, left-right directions through a driving motor. Of course, the first adjustment mechanism and the second adjustment mechanism can be set simultaneously or selectively.

[0050] Optionally, the first punching mechanism 41 includes a first lifting assembly and a first punching plate. The movable end of the first lifting assembly is fixedly connected to the first punching plate, and the first lifting assembly is configured to drive the first punching plate to move up and down; at least two groups of first knife grooves corresponding to the tabs 14 are arranged on the first punching plate. By setting at least two groups of first knife grooves corresponding to the tabs, the function of punching out multiple tabs simultaneously is realized, improving the efficiency of pole piece cutting. Taking the example of setting 8 groups of first knife grooves on the first punching plate, when the first punching plate of the first punching mechanism 41 makes one punch, 8 tabs 14 can be simultaneously formed on 8 pole pieces 10, greatly improving the efficiency of pole piece cutting.

[0051] Optionally, the second punching mechanism 42 includes a second lifting assembly and a second punching plate. The movable end of the second lifting assembly is fixedly connected to the second punching plate, and the second lifting assembly is configured to drive the second punching plate to move up and down; at least three groups of second knife grooves corresponding to the V-shaped corners 15 are arranged on the second punching plate. Taking the example of setting 9 groups of second knife grooves on the second punching plate, when the second punching plate of the second punching mechanism 42 makes one punch, 9 V-shaped corners 15 can be simultaneously formed on the pole piece 10, so that V-shaped corners 15 can be formed at two adjacent corners of 8 pole pieces, greatly improving the efficiency of pole piece cutting.

[0052] As an achievable implementation manner, the pole piece slitting section 30 is arranged after the pole piece punching section 40. The pole piece punching section 40 is configured to punch the pole piece 10 into a pole piece group with at least two tabs; the width of the pole piece group is the width of at least two standard pole pieces. The pole piece slitting section 30 is configured to slit the pole piece group into at least two standard-width pole pieces. Taking the setting of 7 cutting knives as an example, the distance between each two cutting knives is the width of one standard pole piece. Of course, the number of cutting knives can also be set to 2, 3, 4, 5, 6... 15, which will not be elaborated one by one here. After the pole piece 10 is punched by the pole piece punching section, a pole piece group composed of 8 standard-width battery cells arranged side by side is formed, and then the pole piece slitting section 30 simultaneously slits the pole piece group into 8 standard pole pieces.

[0053] As an achievable implementation manner, the pole piece slitting section 30 is arranged before the pole piece punching section 40. The pole piece slitting section 30 is configured to slit the pole piece 10 into at least two groups of parallel pole piece strips; the pole piece punching section 40 is configured to punch the pole piece strips into pole pieces with the standard length and tabs 14. Taking the setting of 7 cutting knives as an example, the distance between each two cutting knives is the width of one standard pole piece. The pole piece slitting section 30 can simultaneously slit the pole piece 10 into 8 groups of pole piece strips along the conveying track 13, so the width of the pole piece strips is the width of one standard pole piece. Of course, the number of cutting knives can also be set to 2, 3, 4, 5, 6... 15, which will not be elaborated one by one here. After the pole piece strips are punched by the second punching mechanism 42, a V angle 15 is generated. At this time, the pole piece strips are still continuous. The pole piece strips are then punched by the first punching mechanism 41 to generate tabs 16 and the pole piece strips are cut off, and 8 standard pole pieces with tabs 16 are formed in one punching.

[0054] As an implementable embodiment, the pole piece cutting section 30 further includes a pressing mechanism. The pressing mechanism includes an upper pressing assembly and a lower pressing assembly that are symmetrically arranged. Both the upper pressing assembly and the lower pressing assembly are configured with slots for the cutting knife to pass through. The upper pressing assembly and the lower pressing assembly are configured to press and convey the pole piece 10. Optionally, both the upper pressing assembly and the lower pressing assembly are composed of a belt and a driving motor. The pole piece 10 is pressed by the belt, and then the driving motor drives the belt to rotate, thereby driving the pole piece 10 to be conveyed backward. During the conveying process, the cutting knife cuts the pole piece 10 in the slot. Optionally, the cutting knife can be circular or horizontal in shape. When a circular turntable-shaped cutting knife is selected for the cutting knife, a rotating motor can be set to drive the cutting knife to rotate, improving the cutting quality and efficiency. Specifically, multiple cutting knives are fixedly installed on the rotating rod, and the rotating motor drives the rotating rod to rotate, achieving the effect of driving multiple cutting knives to rotate simultaneously. Optionally, the cutting knife can be connected to a cutting knife lifting cylinder or a cutting knife lifting motor. When cutting is required, it drives the cutting knife to move into the slot to cut the pole piece 10. When the cutting is completed, it drives the cutting knife to rise away from the pole piece 10, which is both safe and protects the subsequent pole piece 10.

[0055] As an implementable embodiment, the pole piece feeding section 20 further includes a tension control mechanism 22 and a pole piece buffering mechanism 23. The tension control mechanism 22 is configured to adjust the tension of the pole piece 10 during the conveying process; the pole piece buffering mechanism 23 is configured to buffer the pole piece 10 and keep the pole piece 10 under a certain tension. By setting the tension control mechanism 22 and the pole piece buffering mechanism 23, the stability and continuity of the conveying of the pole piece 10 are improved. Optionally, the tension control mechanism can be set with a tension control motor with a tension sensor. The tension of the pole piece 10 is detected in real time through the tension sensor, and the tension control motor is controlled to drive the roller group to rotate, realizing the function of adjusting the pole piece tension in real time. Optionally, the pole piece buffering mechanism can be set with a movable pulley group. When the sensor detects that the movable pulley moves to the loading position, the pole piece unwinding mechanism 21 is controlled to feed. When the sensor detects that the movable pulley moves to the stop position, the pole piece unwinding mechanism 21 is controlled to stop feeding.

[0056] As a feasible implementation, the electrode cutting device also includes an edge detection unit 50, which is arranged at the back of the electrode cutting unit 30, and the edge detection unit 50 is configured to continuously detect the edge of the electrode after the electrode cutting unit 30 cuts. By setting the edge detection unit 50, the quality of the electrode cutting is detected in real time, the occurrence of rework is reduced, and the cutting quality of the electrode is improved. Optionally, the edge detection unit can be a camera module, which detects the cutting conditions at both ends of the electrode width direction by taking pictures with a camera, mainly burr detection. If the burr is detected to be substandard, the back-end is controlled to automatically discharge the corresponding NG electrode. By analyzing the frequency and position of NG electrode, the quality of the cutter can also be checked. When there are many NG electrode, the control machine alarm is notified to notify the operator to check the status of the cutter.

[0057] like Figure 6 As shown, in another embodiment of the present application, the pole piece punching section 40 is configured into at least two groups, and the pole piece cutting device further includes a shunt section 60, which is arranged between the pole piece cutting section 30 and the pole piece punching section 40, and the shunt section 60 is configured to shunt and transport the pole piece strips obtained by the pole piece cutting section 30 to at least two groups of pole piece punching sections 40 for punching processing. By setting the shunt section 60, the pole piece strips are shunt and transported to at least two groups of pole piece punching sections 40 for punching processing, thereby improving production efficiency. Taking two groups of pole piece punching sections 40 and 8 groups of pole piece strips as an example, the shunt section 60 is used to divide the 8 groups of pole piece strips into two teams, each team consists of 4 groups of pole piece strips, and each team is provided with a group of pole piece punching sections 40 in the back, and each group of pole piece punching sections 40 punches 4 groups of pole piece strips at the same time, thereby improving production efficiency.

[0058] The present invention has been described in sufficient detail with certain particularity. It should be understood by those skilled in the art that the description in the embodiments is merely exemplary, and all changes made without departing from the true spirit and scope of the present invention should fall within the scope of protection of the present invention. The scope of protection claimed by the present invention is defined by the claims, rather than by the above description in the embodiments.

Claims

1. A pole piece cutting device, characterized in that, The polar plate cutting device includes a polar plate feeding part, a polar plate slitting part and a polar plate punching part, wherein: The polar plate feeding part includes a polar plate uncoiling mechanism configured to release the polar plate from the material roll. The polar plate includes a metal layer and a dressing layer disposed at intervals on the metal layer. Each dressing layer includes dressing layers symmetrically disposed on the upper and lower surfaces of the metal layer. The length of each dressing layer is the length of a standard polar plate, and the length direction of each dressing layer is the same as the conveying direction of the polar plate; The polar plate slitting part is located at the post-station of the polar plate feeding part. The polar plate slitting part includes at least one cutting knife configured to slit the polar plate along the conveying direction of the polar plate; The polar plate punching part includes a first punching mechanism and a positioning mechanism. The positioning mechanism is configured to position the position information of the area to be punched on the polar plate. The first punching mechanism punches the polar plate in the area to be punched according to the position information to form a tab. The area to be punched on the polar plate is located at the metal layer where the dressing layer is not laid; The polar plate punching part further includes a second punching mechanism configured to punch a V-angle on the polar plate. The second punching mechanism punches the polar plate in the area to be punched according to the position information to form a V-angle; The first punching mechanism includes a first lifting assembly and a first punching plate. The movable end of the first lifting assembly is fixedly connected to the first punching plate. The first lifting assembly is configured to drive the first punching plate to move up and down. At least two groups of first knife grooves corresponding to the tabs are arranged on the first punching plate; The second punching mechanism includes a second lifting assembly and a second punching plate. The movable end of the second lifting assembly is fixedly connected to the second punching plate. The second lifting assembly is configured to drive the second punching plate to move up and down. At least three groups of second knife grooves corresponding to the V-angles are arranged on the second punching plate; 2. The pole piece cutting device according to claim 1, characterized in that, The polar plate punching part further includes a first adjustment mechanism. The first punching mechanism is fixedly installed on the first adjustment mechanism. The first adjustment mechanism is configured to drive the first punching mechanism to move in the first horizontal direction and / or the second horizontal direction according to the position information; and / or, The polar plate punching part further includes a second adjustment mechanism. The second punching mechanism is fixedly installed on the second adjustment mechanism. The second adjustment mechanism is configured to drive the second punching mechanism to move in the first horizontal direction and / or the second horizontal direction according to the position information; Wherein, the first horizontal direction and the second horizontal direction are perpendicular to each other.

3. The pole piece cutting device according to claim 1, characterized in that, The polar plate slitting part is arranged at the post-station of the polar plate punching part. The polar plate punching part is configured to punch the polar plate into a polar plate group with at least two tabs. The polar plate slitting part is configured to slit the polar plate group into at least two standard-width polar plates.

4. The pole piece cutting device according to claim 1, characterized in that, The pole piece slitting section is arranged in the front process of the pole piece punching section, and the pole piece slitting section is configured to slit the pole piece into at least two groups of mutually parallel pole piece strips; the pole piece punching section is configured to punch the pole piece strips into pole pieces with tabs and of a standard length.

5. The pole piece cutting device according to claim 4, wherein The pole piece punching section is configured to be at least two groups, and the pole piece cutting device further includes a shunting section. The shunting section is arranged between the pole piece slitting section and the pole piece punching section, and the shunting section is configured to shunt and convey the pole piece strips obtained by slitting in the pole piece slitting section to the at least two groups of pole piece punching sections for punching processing.

6. The pole piece cutting device according to claim 1, characterized in that, The cutting knives of the pole piece slitting section are at least two, and the distance between two adjacent cutting knives is configured to be the width of a standard pole piece.

7. The pole piece cutting device according to claim 1, characterized in that, The pole piece slitting section further includes a pressing mechanism. The pressing mechanism includes an upper pressing component and a lower pressing component which are symmetrically arranged. Both the upper pressing component and the lower pressing component are configured with slots for the cutting knives to pass through, and the upper pressing component and the lower pressing component are configured to press and convey the pole piece.

8. The pole piece cutting device according to claim 1, wherein, The pole piece feeding section further includes a tension control mechanism and a pole piece buffer mechanism. The tension control mechanism is configured to adjust the tension of the pole piece during conveying; the pole piece buffer mechanism is configured to buffer the pole piece to keep the pole piece under a certain tension.

9. The pole piece cutting device according to claim 1, wherein, The pole piece cutting device further includes an edge detection section. The edge detection section is arranged in the subsequent process of the pole piece slitting section, and the edge detection section is configured to continuously detect the edges of the pole pieces after slitting in the pole piece slitting section.

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