Pole piece lithium supplementing system
By setting up a mask strip to cover the tab area in the electrode replenishment system, the problem of the tab being covered during the electrode replenishment process is solved, enabling continuous replenishment of multiple electrodes, improving product yield and production efficiency, and reducing costs.
Patent Information
- Application Number
- CN202520090084.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-01-15
AI Technical Summary
Existing electrode replenishment systems are prone to causing the tab area to be covered by lithium ions, resulting in electrode scrap and reduced product yield. Furthermore, they can only replenish lithium on a single electrode, which is time-consuming, labor-intensive, and reduces production efficiency.
Design an electrode lithium replenishment system, including an unwinding chamber, a process vacuum chamber, and a rewinding chamber. It is equipped with a coating cold roller and a mask transport assembly. The mask strip covers the tab area, enabling continuous evaporation of lithium metal on multiple electrode sheets, avoiding tab area coverage and improving production efficiency.
This effectively prevents lithium ions from covering the tab area, improves product yield, enables simultaneous lithium replenishment of multiple electrodes, saves costs, and improves production efficiency.
Smart Images
Figure CN223815745U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to lithium ion battery technical field especially relates to a pole piece lithium supplement system. BACKGROUND
[0002] In recent years, with the popularity of lithium ion batteries, consumers also put forward higher requirements on the performance of lithium ion batteries. The negative electrode lithium supplement technology of lithium ion battery is an important means to improve the energy density and cycle life of lithium ion battery.
[0003] The pole piece lithium supplement system in the prior art is easy to cause the tab area to be covered by lithium ions during the lithium supplement process of the pole piece, thereby causing the pole piece to be scrapped, reducing the product yield and increasing the cost. At the same time, the existing pole piece lithium supplement system can only supplement lithium to a single pole piece, which is time-consuming and laborious and reduces the production efficiency.
[0004] Therefore, it is urgent to design a pole piece lithium supplement system to solve the above technical problems. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a pole piece lithium supplement system, which can improve the product yield, improve the production efficiency and save the cost.
[0006] To achieve this purpose, the utility model adopts the following technical scheme:
[0007] The utility model provides a pole piece lithium supplement system, which is characterized by comprising unwinding chamber, process vacuum chamber and winding chamber which are sequentially arranged along the transmission direction of the pole piece.
[0008] The unwinding chamber is provided with an unwinding roller, the process vacuum chamber is provided with a coated cold roller, and the winding chamber is provided with a winding roller, and the pole piece is sequentially wound on the unwinding roller, the coated cold roller and the winding roller.
[0009] The process vacuum chamber is also provided with a coating source and a mask transmission assembly, and the coating source is configured to evaporate lithium.
[0010] The mask transmission assembly comprises a mask belt and a first transmission roller system, and the first transmission roller system is drivingly connected with the mask belt to place part of the mask belt between the coating source and the pole piece wound on the coated cold roller, and the mask belt is configured to shield the tab area on the pole piece.
[0011] As an optional technical scheme of the pole piece lithium supplement system, the mask belt is provided in plurality, the pole piece has a plurality of tab areas, and the mask belt is provided in one-to-one correspondence with the tab areas.
[0012] As an optional technical scheme of the lithium supplement system of the pole piece, the area of the mask belt is the same as the area of the pole lug region.
[0013] As an optional technical scheme of the lithium supplement system of the pole piece, the first transmission roller system is provided with a plurality of limiting grooves, the limiting grooves are provided in one-to-one correspondence with the mask belt, and part of the mask belt is arranged in the limiting groove.
[0014] As an optional technical scheme of the lithium supplement system of the pole piece, the coating source is located directly below the coating cold roller, and a coating area is formed between the coating source and part of the coating cold roller, and part of the mask belt is located in the coating area.
[0015] As an optional technical scheme of the lithium supplement system of the pole piece, the coating source is provided in a plurality of forms, and the plurality of coating sources are arranged at equal intervals.
[0016] As an optional technical scheme of the lithium supplement system of the pole piece, the coating source is an evaporation boat or a high-frequency induction crucible.
[0017] As an optional technical scheme of the lithium supplement system of the pole piece, a first channel is arranged in the unwinding chamber, a second channel is arranged in the winding chamber, the unwinding chamber is communicated with the process vacuum chamber through the first channel, the winding chamber is communicated with the process vacuum chamber through the second channel, the pole piece on the unwinding roller is wound on the coating cold roller through the first channel, and the pole piece after lithium supplement is wound on the winding roller through the second channel.
[0018] As an optional technical scheme of the lithium supplement system of the pole piece, a first valve is arranged in the unwinding chamber, and the first valve is in sliding connection with the inner wall of the unwinding chamber; a second valve is arranged in the winding chamber, and the second valve is in sliding connection with the inner wall of the winding chamber.
[0019] The first valve is configured to block the first channel, so that the unwinding chamber is isolated from the process vacuum chamber; and the second valve is configured to block the second channel, so that the winding chamber is isolated from the process vacuum chamber.
[0020] As an optional technical scheme of the lithium supplement system of the pole piece, the coating cold roller is provided in two forms, and a plurality of turning rollers are further arranged in the process vacuum chamber, and the turning rollers are configured to turn the pole piece.
[0021] The beneficial effects of the utility model at least include:
[0022] The utility model provides a kind of pole piece lithium supplement system, the pole piece lithium supplement system includes unwinding chamber, process vacuum chamber and winding chamber sequentially arranged along the transmission direction of pole piece. Unwinding chamber is provided with unwinding roller, process vacuum chamber is provided with plated cold roll, winding chamber is provided with winding roller, and pole piece is sequentially arranged on unwinding roller, plated cold roll and winding roller. Process vacuum chamber is provided with coating source and mask transmission assembly, and coating source is configured as evaporation lithium. Mask transmission assembly includes mask belt and first transmission roller system, and first transmission roller system is drivenly connected with mask belt, to place part of mask belt between coating source and pole piece arranged on plated cold roll, and mask belt is configured to shield pole lug area on pole piece.
[0023] Above, by the transmission of first transmission roller system to mask belt, so that mask belt can shield pole lug area on pole piece arranged on plated cold roll, so that in the process of coating, lithium ion evaporated by coating source can be effectively avoided to cover pole lug area, to ensure the safety of pole lug area, improve product yield. Pole piece is sequentially arranged on unwinding roller, plated cold roll and winding roller, and it can be understood that unwinding roller, plated cold roll and winding roller are driven by conventional motor, and in the process of pole piece transmission, mask transmission assembly synchronously transmits mask belt, so that mask belt can shield every pole lug area on pole piece, and coating source continuously evaporates lithium ion, so that the purpose of continuous evaporation of lithium metal on pole piece is realized, so that the pole piece lithium supplement system can be used for lithium supplement to multiple pole pieces, save time and effort, improve production efficiency and save cost. BRIEF DESCRIPTION OF DRAWINGS
[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the contents of the embodiments of the utility model and these drawings without creative labor for those skilled in the art.
[0025] Figure 1 It is the structure schematic view of pole piece lithium supplement system provided by the embodiments of the utility model;
[0026] Figure 2 It is the structure schematic view of first transmission roller system provided by the embodiments of the utility model;
[0027] Figure 3 It is the structure schematic view of mask belt provided by the embodiments of the utility model;
[0028] Figure 4 It is the structure schematic view of pole piece after lithium supplement provided by the embodiments of the utility model.
[0029] Reference numerals
[0030] 10, pole piece; 11, tab area;
[0031] 100, unwinding chamber; 110, unwinding roller; 120, first passage; 130, first valve;
[0032] 200, process vacuum chamber; 210, coating cold roller; 220, coating source; 230, second transmission roller system;
[0033] 300, winding chamber; 310, winding roller; 320, second passage; 330, second valve;
[0034] 400, mask transmission assembly; 410, mask strip; 420, first transmission roller system; 4201, limiting groove; 500, deflection roller. DETAILED DESCRIPTION
[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.
[0036] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.
[0037] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0038] In the description of the utility model, it needs to be explained that, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two.
[0039] In the description of the utility model, it also needs to be explained that, unless otherwise specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0040] In the utility model, unless otherwise specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0041] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.
[0042] The embodiment provides a kind of lithium supplement system of pole piece, which can improve production efficiency, save cost.
[0043] As Figures 1-4As shown, the lithium supplement system for the pole piece mainly includes a unwinding chamber 100, a process vacuum chamber 200 and a winding chamber 300 arranged in sequence along the transmission direction of the pole piece 10. The unwinding chamber 100 is provided with a unwinding roller 110, the process vacuum chamber 200 is provided with a coated cold roller 210, and the winding chamber 300 is provided with a winding roller 310. The pole piece 10 is wound on the unwinding roller 110, the coated cold roller 210 and the winding roller 310 in sequence. The process vacuum chamber 200 is provided with a coating source 220 and a mask transmission assembly 400. The coating source 220 is configured to evaporate lithium. The mask transmission assembly 400 includes a mask strip 410 and a first transmission roller system 420. The first transmission roller system 420 is drivingly connected with the mask strip 410 to place part of the mask strip 410 between the coating source 220 and the pole piece 10 wound on the coated cold roller 210. The mask strip 410 is configured to shield the tab area 11 on the pole piece 10.
[0044] Based on the above design, in the present embodiment, the mask strip 410 is transmitted by the first transmission roller system 420, so that the mask strip 410 can shield the tab area 11 on the pole piece 10 wound on the coated cold roller 210. In this way, during the coating process, the lithium ions evaporated by the coating source 220 can be effectively prevented from covering the tab area 11, ensuring the safety of the tab area 11 and improving the product yield. The pole piece 10 is wound on the unwinding roller 110, the coated cold roller 210 and the winding roller 310 in sequence. During the transmission of the pole piece 10, the mask transmission assembly 400 synchronously transmits the mask strip 410, so that the mask strip 410 can shield each tab area 11 on the pole piece 10. The coating source 220 continuously evaporates lithium ions. In this way, the purpose of continuously evaporating lithium metal on the pole piece 10 is achieved. Therefore, the lithium supplement system for the pole piece can be used for supplementing lithium for multiple pole pieces, saving time and effort, improving production efficiency and saving cost.
[0045] It should be noted that, Figure 2 the arrow direction in the above figure is the transmission direction of the first transmission roller system 420, Figure 3 the arrow direction in the above figure is the transmission direction of the mask strip 410, Figure 4 the arrow direction in the above figure is the transmission direction of the pole piece 10, and the transmission direction of the pole piece 10 is consistent with the transmission direction of the mask strip 410.
[0046] As shown in the above figure, Figure 1As shown, in the embodiment, a second transmission roller system 230 is further arranged in the process vacuum chamber 200, and is used for transmitting the pole piece 10, so as to improve the transmission efficiency of the pole piece 10. The first transmission roller system 420 and the second transmission roller system 230 in the embodiment are independently operated, and are driven by independent driving devices, and have the same linear speed. For example, the driving device can be a motor.
[0047] In some optional embodiments, the first transmission roller system 420 comprises at least one driving roller driven by a motor, and the mask belt 410 is arranged on the first transmission roller system 420 to realize the driving effect of the first transmission roller system 420 on the mask belt 410. The unwinding roller 110, the plated cold roller 210 and the winding roller 310 in the second transmission roller system 230 are used as driving rollers to realize the driving effect of the second transmission roller system 230 on the pole piece 10.
[0048] It can be understood that the first transmission roller system 420 and the second transmission roller system 230 in the embodiment can be provided in multiple numbers to improve the stability and transmission efficiency of the transmission of the pole piece 10 and the mask belt 410.
[0049] It can be understood that, Figure 4 The pole piece 10 after lithium supplement, Figure 4 The black area in the figure is the active material layer (lithium) to be evaporated, and the blank area between the two adjacent active material layers is the tab area 11. In the process of evaporating lithium supplement, the mask belt 410 shields the blank area to avoid the blank area being covered by lithium and causing the pole piece 10 to be scrapped. In addition, Figure 4 The figure shows four pole pieces, and of course, the operator can also set five pole pieces, six pole pieces, seven pole pieces, etc. according to actual needs, which will not be described here.
[0050] It should be noted that the pole piece 10 in the embodiment can be a negative pole piece.
[0051] As Figures 2-4 shown, the mask belt 410 in the embodiment is provided in multiple numbers, the pole piece 10 has multiple tab areas 11, the mask belt 410 is arranged in one-to-one correspondence with the tab areas 11, and the area of the mask belt 410 is the same as that of the tab area 11. In this way, each mask belt 410 can shield the corresponding tab area 11 during the lithium supplement process, improving the safety and product yield. At the same time, multiple pole pieces can be supplemented with lithium, improving the work efficiency and saving the cost.
[0052] As Figure 2As shown, a plurality of limiting grooves 4201 are arranged on the first transmission roller system 420 in the embodiment, and the limiting grooves 4201 are arranged one-to-one with the mask belt 410, and part of the mask belt 410 is arranged in the limiting groove 4201. By arranging the limiting groove 4201 on the first transmission roller system 420, the mask belt 410 can be limited during transmission, so that the relative positions of the plurality of mask belts 410 can be kept unchanged, the accuracy of the first transmission roller system 420 in transmitting the mask belt 410 is improved, the phenomenon of the mask belt 410 deviating is avoided, and it is ensured that the mask belt 410 can completely shield the tab area 11, and the product yield is improved.
[0053] As shown, Figure 1 The film coating source 220 in the embodiment is located directly below the film coating cold roller 210, and a film coating area is formed between the film coating source 220 and part of the film coating cold roller 210, and part of the mask belt 410 is located in the film coating area. In this way, lithium ions evaporated by the film coating source 220 can be attached to the pole piece 10 in time, reducing the phenomenon of lithium ions drifting to the process vacuum chamber 200 and being attached to the inner wall of the process vacuum chamber 200, and improving the efficiency of lithium supplement.
[0054] Optionally, the film coating source 220 in the embodiment is arranged in a plurality of forms, and the plurality of film coating sources 220 are arranged at equal intervals, thereby improving the uniformity of the lithium supplement of the pole piece 10. For example, the number of the film coating source 220 can be set according to the width of the pole piece 10, and the width of the pole piece 10 can be set to be between 30 mm and 1500 mm.
[0055] Optionally, the distance between the film coating source 220 and the film coating cold roller 210 in the embodiment is set to be between 200 mm and 500 mm, which can ensure the uniformity of the film coating (lithium metal evaporation) and maximize the film coating efficiency.
[0056] Optionally, the film coating source 220 in the embodiment can be an evaporation boat evaporation, a high-frequency induction crucible evaporation or other evaporation methods. The film coating source 220 belongs to the prior art in the field, and the specific structure and working principle thereof will not be described herein.
[0057] As shown, Figure 1As shown, in the present embodiment, the unwinding chamber 100 is provided with a first channel 120, and the winding chamber 300 is provided with a second channel 320. The unwinding chamber 100 is communicated with the process vacuum chamber 200 through the first channel 120, and the winding chamber 300 is communicated with the process vacuum chamber 200 through the second channel 320. The pole piece 10 on the unwinding roller 110 passes through the first channel 120 and is wound on the coating cold roller 210, and the pole piece 10 after lithium supplement passes through the second channel 320 and is wound on the winding roller 310. The first valve 130 is arranged in the unwinding chamber 100 and is in sliding connection with the inner wall of the unwinding chamber 100. The second valve 330 is arranged in the winding chamber 300 and is in sliding connection with the inner wall of the winding chamber 300. The first valve 130 is configured to block the first channel 120, so as to isolate the unwinding chamber 100 from the process vacuum chamber 200. The second valve 330 is configured to block the second channel 320, so as to isolate the winding chamber 300 from the process vacuum chamber 200.
[0058] Optionally, the first valve 130 and the second valve 330 in the present embodiment are both in driving connection with the respective driving cylinders, so as to control the lifting movement of the first valve 130 and the second valve 330.
[0059] Optionally, the positions of the unwinding chamber 100 and the winding chamber 300 relative to the process vacuum chamber 200 can be flexibly adjusted according to actual needs.
[0060] After the vacuum coating lithium supplement work is completed, the driving cylinders control the first valve 130 and the second valve 330 to move, so as to isolate the process vacuum chamber 200 from the unwinding chamber 100 and the winding chamber 300. At this time, the operator can separately break the vacuum of the unwinding chamber 100 and the winding chamber 300. After the vacuum breaking is completed, the pole piece 10 in the unwinding chamber 100 is cut by a blade at a position about 20 cm away from the first valve 130 (for new winding connection). At this time, the process vacuum chamber 200 is maintained in a high vacuum state. Similarly, the operator can break the vacuum of the winding chamber 300, then take out the winding roller 310, and replace the new winding roller 310. When the winding roller 310 is replaced with a new winding and the unwinding roller 110 completes the connection work, the operator only needs to vacuum the unwinding chamber 100 and the winding chamber 300. When the vacuum degree reaches the requirement, the first valve 130 and the second valve 330 are opened, and the first transmission roller system 420 and the second transmission roller system 230 are started, so as to perform the next vacuum coating lithium supplement work, thereby saving time and improving work efficiency without the need for secondary vacuumization of the process vacuum chamber 200.
[0061] As shown in FIG. 4, the first transmission roller system 420 is arranged in the process vacuum chamber 200 and is in driving connection with the first transmission motor 430. The second transmission roller system 230 is arranged in the process vacuum chamber 200 and is in driving connection with the second transmission motor 240. Figure 1As shown, optionally, in this embodiment, the coating cold roller 210 can be configured as two, and a plurality of guiding rollers 500 are also provided in the process vacuum chamber 200. The guiding rollers 500 are configured to turn the electrode 10, thereby realizing lithium replenishment on both sides of the electrode 10. The guiding rollers 500 turn the electrode 10, so that the electrode 10 (after passing through the first coating cold roller 210) Figure 1 The A-side of the intermediate electrode 10 (which has already undergone lithium plating) can be flipped over to facilitate lithium plating on the other side of the electrode 10. Figure 1 The B-side of the intermediate electrode 10 is replenished with lithium; at the same time, the guide roller 500 can also change the transmission direction of the electrode 10 and improve the transmission efficiency of the electrode 10.
[0062] Of course, operators can also set up a coating cold roller 210 to achieve single-sided lithium replenishment of the electrode 10.
[0063] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
[0064] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
Claims
1. A lithium supplement system for an electrode tab, characterized by, The winding-off chamber (100), the process vacuum chamber (200) and the winding chamber (300) are sequentially arranged along the transmission direction of the pole piece (10); The winding-off chamber (100) is provided with a winding-off roller (110), the process vacuum chamber (200) is provided with a coating cold roller (210), and the winding chamber (300) is provided with a winding roller (310); the pole piece (10) is sequentially arranged on the winding-off roller (110), the coating cold roller (210) and the winding roller (310); The process vacuum chamber (200) is further provided with a coating source (220) and a mask transmission assembly (400), and the coating source (220) is configured to evaporate lithium; The mask transmission assembly (400) includes a mask belt (410) and a first transmission roller system (420), and the first transmission roller system (420) is drivingly connected with the mask belt (410) to place part of the mask belt (410) between the coating source (220) and the pole piece (10) arranged on the coating cold roller (210), and the mask belt (410) is configured to shield the tab area (11) on the pole piece (10).
2. The lithium supplement system for pole piece according to claim 1, characterized in that, The mask belt (410) is provided in a plurality of forms, the pole piece (10) has a plurality of tab areas (11), and the mask belt (410) is provided in one-to-one correspondence with the tab areas (11).
3. The lithium supplement system for pole piece according to claim 2, characterized in that, The area of the mask belt (410) is the same as the area of the tab area (11).
4. The lithium supplement system for pole piece of claim 2, wherein, The first transmission roller system (420) is provided with a plurality of limiting grooves (4201), and the limiting grooves (4201) are provided in one-to-one correspondence with the mask belt (410), and part of the mask belt (410) is arranged in the limiting grooves (4201).
5. The lithium supplement system for pole piece of claim 1, wherein, The coating source (220) is located directly below the coating cold roller (210), and a coating area is formed between the coating source (220) and part of the coating cold roller (210), and part of the mask belt (410) is located in the coating area.
6. The lithium supplement system for pole piece of claim 1, wherein, The coating source (220) is provided in a plurality of forms, and the plurality of coating sources (220) are arranged at equal intervals.
7. The lithium supplement system for pole piece according to claim 6, characterized in that, The coating source (220) is an evaporation boat or a high-frequency induction crucible.
8. The lithium supplement system for pole piece of claim 1, wherein, The winding-off chamber (100) is provided with a first channel (120), and the winding chamber (300) is provided with a second channel (320); the winding-off chamber (100) is communicated with the process vacuum chamber (200) through the first channel (120), and the winding chamber (300) is communicated with the process vacuum chamber (200) through the second channel (320); the pole piece (10) on the winding-off roller (110) passes through the first channel (120) to be arranged on the coating cold roller (210), and the pole piece (10) after lithium supplementation passes through the second channel (320) to be arranged on the winding roller (310).
9. The lithium supplement system for pole piece according to claim 8, characterized in that, The unwinding chamber (100) is provided with a first valve (130) which is in sliding connection with the inner wall of the unwinding chamber (100); the winding chamber (300) is provided with a second valve (330) which is in sliding connection with the inner wall of the winding chamber (300); The first valve (130) is configured to block the first channel (120) to isolate the unwinding chamber (100) from the process vacuum chamber (200); the second valve (330) is configured to block the second channel (320) to isolate the winding chamber (300) from the process vacuum chamber (200).
10. The lithium supplement system for pole piece of any one of claims 1-9, wherein, The coating cold roller (210) is provided in two, and the process vacuum chamber (200) is further provided with a plurality of turning rollers (500), and the turning rollers (500) are configured to turn the pole piece (10).