Lithium supplementing equipment

Abstract

The utility model provides lithium supplementing equipment, which relates to the technical field of lithium battery production equipment and comprises a lithium strip conveying device, a pole piece conveying device and a release agent coating device, the lithium strip conveying device comprises a first feeding mechanism, a second feeding mechanism, a first transferring mechanism and a second transferring mechanism, the first feeding mechanism conveys a lithium strip to the first transferring mechanism, the second feeding mechanism conveys the lithium strip to the second transferring mechanism, and the first transferring mechanism and the second transferring mechanism are oppositely arranged to form a first material passing gap; the pole piece conveying device is arranged corresponding to the first material passing gap, so that the pole piece passes through the first material passing gap; the release agent coating device comprises a first coating mechanism and a second coating mechanism which are located between the first feeding mechanism and the first transferring mechanism, and the second coating mechanism is located between the second feeding mechanism and the second transferring mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production equipment, in particular to a lithium replenishing device. Background Art

[0002] With the rapid development of the new energy vehicle market, the performance requirements for lithium-ion batteries are becoming more and more stringent. Solving the problem of battery life anxiety is imminent. Improving the energy density and cycle life of lithium-ion batteries has become the current research focus. At present, silicon negative electrode materials have high capacity and safety, which is better than graphite negative electrode materials. They are also abundant in reserves and have excellent fast charging performance. They are the most promising next-generation high-energy density lithium battery negative electrode materials. However, the disadvantage of silicon negative electrode is low initial efficiency. The solid electrolyte membrane (SE I membrane) formed during the first charge and discharge process consumes a large amount of active lithium. In addition, side reactions will occur during the cycle process, continuously consuming active lithium and thus shortening the cycle life of the battery. Therefore, replenishing lithium to the electrode is an effective means to improve the energy density and cycle life of lithium-ion batteries.

[0003] At present, lithium replenishment technologies mainly include positive electrode replenishment and negative electrode replenishment. Among them, lithium foil replenishment technology in negative electrode replenishment has advantages in safety, cost and efficiency. Most of the existing lithium replenishment equipment transfers the lithium strip to the carrier film first during the lithium replenishment process, and then transfers it to the surface of the pole piece to complete the pole piece lithium replenishment. However, this method not only has a low lithium replenishment efficiency, but also the carrier film cannot be reused, resulting in a high lithium replenishment cost.

[0004] Therefore, there is an urgent need to provide a lithium supplement device to solve the problems existing in the prior art to a certain extent. Utility Model Content

[0005] The utility model aims to provide a lithium replenishing device to solve the problem that lithium replenishing requires a carrier film, which not only has low efficiency but also cannot be reused, resulting in high lithium replenishing cost.

[0006] The utility model provides a lithium replenishing device, comprising a lithium belt conveying device, a pole piece conveying device and a release agent coating device; the lithium belt conveying device comprises a first feeding mechanism, a second feeding mechanism, a first transfer mechanism and a second transfer mechanism, the first feeding mechanism conveys the lithium belt to the first transfer mechanism, the second feeding mechanism conveys the lithium belt to the second transfer mechanism, the first transfer mechanism and the second transfer mechanism are arranged relative to each other to form a first feeding gap; the pole piece conveying device is arranged corresponding to the first feeding gap, so that the pole piece passes through the first feeding gap; the release agent coating device comprises a first coating mechanism and a second coating mechanism, the first coating mechanism is located between the first feeding mechanism and the first transfer mechanism, and the second coating mechanism is located between the second feeding mechanism and the second transfer mechanism.

[0007] Among them, the first feeding mechanism and the second feeding mechanism both include an unwinding box and a lithium strip unwinding roller; the lithium strip unwinding roller is arranged in the unwinding box, the lithium strip is wound on the lithium strip unwinding roller, the unwinding box is formed with a discharge port, and the lithium strip is fed out of the unwinding box through the discharge port.

[0008] Specifically, support rollers are provided between the first feeding mechanism and the first transfer mechanism and between the second feeding mechanism and the second transfer mechanism, and the lithium strip is fed out from the discharge port and transferred to the first transfer mechanism and the second transfer mechanism through the support rollers.

[0009] Furthermore, the lithium replenishing equipment provided by the utility model also includes a cutting mechanism, which is located between the lithium strip unwinding roller and the supporting roller and is used to cut the lithium strip.

[0010] Furthermore, the cutting mechanism includes a first driving member and two cutting members, the two cutting members are relatively arranged on both sides of the lithium belt to form a cutting gap, and the first driving member can drive the two cutting members to move towards or away from each other.

[0011] Among them, the first transfer mechanism and the second transfer mechanism both include a calendering roller and a transfer roller, a second feeding gap is formed between the calendering roller and the transfer roller, and the calendering roller presses the lithium strip onto the transfer roller; the transfer roller of the first transfer mechanism and the transfer roller of the second transfer mechanism are arranged relative to each other to form the first feeding gap, and the transfer roller presses the attached lithium strip onto the electrode.

[0012] Specifically, the rotation speed of the transfer roller is not less than the rotation speed of the calendering roller.

[0013] Furthermore, the electrode sheet conveying device comprises an electrode sheet unwinding roller and a winding roller, and the electrode sheet unwinding roller conveys the electrode sheet to the winding roller.

[0014] Among them, the first coating mechanism and the second coating mechanism both include a feeding member, a transfer roller and a coating roller; the release agent is contained in the feeding member, and a portion of the transfer roller is immersed in the feeding member and in contact with the release agent; the coating rollers are arranged opposite to each other and form a coating gap, and the lithium strip passes through the coating gap to be coated with the release agent.

[0015] Specifically, the first coating mechanism and the second coating mechanism further include a scraper assembly, the scraper assembly includes a scraper plate and a second driving member, the scraper plates are arranged in a one-to-one correspondence with the transfer rollers, and the second driving member can drive the scraper plates to move toward or away from the transfer roller.

[0016] Compared with the prior art, the lithium replenishment equipment provided by the utility model has the following advantages:

[0017] The lithium replenishing equipment provided by the utility model comprises a lithium belt conveying device, a pole piece conveying device and a release agent coating device; the lithium belt conveying device comprises a first feeding mechanism, a second feeding mechanism, a first transfer mechanism and a second transfer mechanism, the first feeding mechanism conveys the lithium belt to the first transfer mechanism, the second feeding mechanism conveys the lithium belt to the second transfer mechanism, the first transfer mechanism and the second transfer mechanism are arranged relatively to form a first feeding gap, the pole piece conveying device is arranged corresponding to the first feeding gap, so that the pole piece passes through the first feeding gap; the release agent coating device comprises a first coating mechanism and a second coating mechanism, the first coating mechanism is located between the first feeding mechanism and the first transfer mechanism, and the second coating mechanism is located between the second feeding mechanism and the second transfer mechanism.

[0018] From this analysis, it can be seen that the lithium tape can be conveyed by the first feeding mechanism, the first transfer mechanism, the second feeding mechanism and the second transfer mechanism included in the lithium tape conveying device. Since the first transfer mechanism and the second transfer mechanism in the present application are relatively arranged to form a first feeding gap, the electrode conveying device is arranged corresponding to the first feeding gap, so that the electrode can pass through the first feeding gap. Therefore, in fact, the lithium tape conveying device in the present application can simultaneously convey two sets of lithium tapes, so that lithium tapes can be attached to both the front and back sides of the electrode.

[0019] In actual operation, the first feeding mechanism and the second feeding mechanism transport the lithium ribbon to the corresponding first transfer mechanism and the second transfer mechanism, and the lithium ribbon can be pressed onto the electrode through the first feeding gap, thereby completing the lithium replenishment operation.

[0020] Furthermore, since the release agent coating device in the present application includes a first coating mechanism and a second coating mechanism, and the first coating mechanism is located between the first feeding mechanism and the first transfer mechanism, and the second coating mechanism is located between the second feeding mechanism and the second transfer mechanism, the lithium tape conveyed from the first feeding mechanism to the first transfer mechanism can pass through the first coating mechanism, and the lithium tape conveyed from the second feeding mechanism to the second transfer mechanism can pass through the second coating mechanism, so that the release agent can be coated on the lithium tape, and then the lithium tape can be smoothly separated from the first transfer mechanism and the second transfer mechanism and pressed on the electrode, thereby avoiding the problem of uneven lithium replenishment of the electrode due to the lithium tape sticking to the first transfer mechanism and the second transfer mechanism.

[0021] It can be understood that, by using the lithium replenishment equipment provided by the present application, since the first coating mechanism and the second coating mechanism are further used to coat the release agent on the lithium strip, the lithium strip can be smoothly pressed onto the electrode, thereby eliminating the need for a carrier film, greatly reducing the cost of lithium replenishment, and the lithium strip can be directly attached to the electrode without multiple transfers, thereby improving the efficiency of lithium replenishment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the overall structure of the lithium replenishment device provided in an embodiment of the utility model.

[0024] In the figure: 1-unwinding box; 2-lithium strip unwinding roller; 3-cutting mechanism; 4-support roller; 5-scraper plate; 6-coating roller; 7-transfer roller; 8-feeding member; 9-calendering roller; 10-transfer roller; 11-electrode sheet unwinding roller; 12-winding roller. DETAILED DESCRIPTION

[0025] 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 clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. 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 application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0026] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply 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 on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0030] For ease of description, spatial relative terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the drawings. Such spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings.

[0031] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0032] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0033] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be considered that the combination of such technical solutions does not exist and is not within the scope of protection required by the present application.

[0034] like Figure 1As shown, the utility model provides a lithium replenishing device, including a lithium belt conveying device, a pole piece conveying device and a release agent coating device; the lithium belt conveying device includes a first feeding mechanism, a second feeding mechanism, a first transfer mechanism and a second transfer mechanism, the first feeding mechanism conveys the lithium belt to the first transfer mechanism, the second feeding mechanism conveys the lithium belt to the second transfer mechanism, the first transfer mechanism and the second transfer mechanism are arranged relative to each other to form a first feeding gap, the pole piece conveying device is arranged corresponding to the first feeding gap, so that the pole piece passes through the first feeding gap; the release agent coating device includes a first coating mechanism and a second coating mechanism, the first coating mechanism is located between the first feeding mechanism and the first transfer mechanism, and the second coating mechanism is located between the second feeding mechanism and the second transfer mechanism.

[0035] Compared with the prior art, the lithium replenishment equipment provided by the utility model has the following advantages:

[0036] The lithium replenishing equipment provided by the utility model can realize the conveyance of lithium tapes through the first feeding mechanism, the first transfer mechanism, the second feeding mechanism and the second transfer mechanism included in the lithium tape conveying device. Since the first transfer mechanism and the second transfer mechanism in the present application are relatively arranged to form a first feeding gap, the electrode conveying device is arranged corresponding to the first feeding gap, so that the electrode can pass through the first feeding gap. Therefore, in fact, the lithium tape conveying device in the present application can simultaneously convey two sets of lithium tapes, so that the lithium tapes can be attached to both the front and back sides of the electrode.

[0037] In actual operation, the first feeding mechanism and the second feeding mechanism transport the lithium ribbon to the corresponding first transfer mechanism and the second transfer mechanism, and the lithium ribbon can be pressed onto the electrode through the first feeding gap, thereby completing the lithium replenishment operation.

[0038] Furthermore, since the release agent coating device in the present application includes a first coating mechanism and a second coating mechanism, and the first coating mechanism is located between the first feeding mechanism and the first transfer mechanism, and the second coating mechanism is located between the second feeding mechanism and the second transfer mechanism, the lithium tape conveyed from the first feeding mechanism to the first transfer mechanism can pass through the first coating mechanism, and the lithium tape conveyed from the second feeding mechanism to the second transfer mechanism can pass through the second coating mechanism, so that the release agent can be coated on the lithium tape, and then the lithium tape can be smoothly separated from the first transfer mechanism and the second transfer mechanism and pressed on the electrode, thereby avoiding the problem of uneven lithium replenishment of the electrode due to the lithium tape sticking to the first transfer mechanism and the second transfer mechanism.

[0039] It can be understood that, by using the lithium replenishment equipment provided by the present application, since the first coating mechanism and the second coating mechanism are further used to coat the release agent on the lithium strip, the lithium strip can be smoothly pressed onto the electrode, thereby eliminating the need for a carrier film, greatly reducing the cost of lithium replenishment, and the lithium strip can be directly attached to the electrode without multiple transfers, thereby improving the efficiency of lithium replenishment.

[0040] Alternatively, if Figure 1 As shown, the first feeding mechanism and the second feeding mechanism in the present application both include an unwinding box 1 and a lithium strip unwinding roller 2; the lithium strip unwinding roller 2 is arranged in the unwinding box 1, the lithium strip is wound on the lithium strip unwinding roller 2, the unwinding box 1 is formed with a discharge port, and the lithium strip is fed out of the unwinding box 1 from the discharge port.

[0041] It can be understood that the lithium ribbon unwinding roller 2 in the present application is connected to a driving structure, and the driving structure can be a motor, and the motor can be used to rotate the lithium ribbon unwinding roller 2, thereby releasing the lithium ribbon.

[0042] Accordingly, since the unwinding box 1 in the present application is formed with a discharge port, the output of the lithium strip can be achieved.

[0043] Preferably, the unwinding box 1 in the present application is made of fireproof and high-temperature resistant materials. Since metallic lithium is an active metal, it is easy to react with water in the air to produce hydrogen, release a large amount of heat and then burn and explode. Therefore, in order to ensure the safety of the lithium replenishment process, the present application first controls the ambient dew point temperature during the lithium replenishment process to be less than minus 50°C. At the same time, by placing the lithium strip unwinding roller 2 in the unwinding box 1, and the unwinding box 1 is made of fireproof and high-temperature resistant materials, once the lithium strip burns, the flame can be controlled in the unwinding box 1 in the initial stage to avoid affecting other equipment and improve the stability and safety of the overall equipment operation.

[0044] Alternatively, if Figure 1 As shown, support rollers 4 are provided between the first feeding mechanism and the first transfer mechanism and between the second feeding mechanism and the second transfer mechanism in the present application. The lithium strip is fed out from the discharge port and transferred to the first transfer mechanism and the second transfer mechanism through the support rollers 4.

[0045] By arranging support rollers 4 between the first feeding mechanism and the first transfer mechanism and between the second feeding mechanism and the second transfer mechanism, the transported lithium belt can be supported. On the one hand, the stable transmission of the lithium belt can be ensured. On the other hand, by arranging the support rollers 4, the setting positions of the first feeding mechanism and the second feeding mechanism can be made more flexible, thereby improving the degree of integration with the environment.

[0046] Alternatively, if Figure 1 As shown, the lithium replenishing device provided by the utility model further includes a cutting mechanism 3, which is located between the lithium strip unwinding roller 2 and the supporting roller 4 and is used to cut the lithium strip.

[0047] When the lithium ribbon catches fire, in order to prevent the flame from being transmitted and burned along the lithium ribbon, a cutting mechanism 3 is provided between the support roller 4 and the lithium ribbon unwinding roller 2. When the lithium ribbon catches fire, the lithium ribbon is directly cut before reaching the support roller 4, thereby preventing the flame from extending further and improving the safety of the overall equipment operation.

[0048] Preferably, if Figure 1 As shown, the cutting mechanism 3 in the present application includes a first driving member and two cutting members, the two cutting members are relatively arranged on both sides of the lithium belt to form a cutting gap, and the first driving member can drive the two cutting members to move towards or away from each other.

[0049] The two cutting components in the present application may adopt cutting blades, the first driving components may also be respectively arranged corresponding to the cutting blades, and the first driving components may adopt a telescopic structure such as an oil cylinder or a pneumatic cylinder.

[0050] In the normal operation stage, the two cutting blades are arranged at intervals to allow the lithium belt to pass smoothly. When the lithium belt needs to be cut, the two first driving components can drive the two cutting blades to move towards each other until the lithium belt is cut. After the burning of the lithium belt is controlled, the two cutting blades can be driven to move away from each other until they return to the initial position and the lithium belt conveying operation continues.

[0051] Alternatively, if Figure 1 As shown, the first transfer mechanism and the second transfer mechanism in the present application both include a calendering roller 9 and a transfer roller 10, a second feed gap is formed between the calendering roller 9 and the transfer roller 10, and the calendering roller 9 presses the lithium ribbon onto the transfer roller 10; the transfer roller 10 of the first transfer mechanism and the transfer roller 10 of the second transfer mechanism are arranged relative to each other to form the first feed gap, and the transfer roller 10 presses the attached lithium ribbon onto the electrode.

[0052] like Figure 1 As shown, the two transfer rollers 10 in the present application are arranged relative to each other to form a first feeding gap, and the distance between the two transfer rollers 10 is adjustable, that is, the two transfer rollers 10 can be driven to rotate by a motor to realize the transfer of the lithium strip to the electrode sheet, and the driving motors of the two transfer rollers 10 can also be connected to a transverse driving mechanism, which can be an oil cylinder or an air cylinder, so that the distance between the two transfer rollers 10 can be adjusted, and then the size of the first feeding gap can be adjusted, so that the lithium strip can be smoothly pressed onto the electrode sheet.

[0053] The present application provides a calendering roller 9, which can cooperate with the transfer roller 10 to form a second feeding gap. The lithium strip entering the second feeding gap can be calendered or attached to the transfer roller 10 to achieve transfer toward the electrode.

[0054] It can be understood that the calendering roller 9 in the present application can also be driven to rotate by a motor and is also connected to a transverse driving mechanism to achieve the purpose of moving the calendering roller 9 toward the transfer roller 10. By adjusting the size of the second feeding gap, the calendering thickness of the lithium belt can be adjusted according to demand to ensure the lithium replenishment effect.

[0055] Preferably, the rotation speed of the transfer roller 10 in the present application is not less than the rotation speed of the calendering roller 9 , so that the lithium ribbon can be stably separated from the transfer roller 10 and pressed onto the electrode sheet.

[0056] It should be noted that the release force of the calendering roller 9 in the present application is smaller than the release force of the transfer roller 10. Since the smaller the release force, the easier it is for the lithium ribbon to be released, making the release force of the calendering roller 9 smaller can prevent the lithium ribbon from sticking to the calendering roller 9. The way to achieve a smaller release force of the calendering roller 9 is to adjust the release force by controlling the amount of oil applied.

[0057] It should be further explained here that the rotation speed ratio of the transfer roller 10 and the calendering roller 9 in the present application is between 1.0 and 2.0.

[0058] Alternatively, if Figure 1 As shown, the electrode sheet conveying device in the present application includes an electrode sheet unwinding roller 11 and a winding roller 12 , and the electrode sheet unwinding roller 11 conveys the electrode sheet to the winding roller 12 .

[0059] The pole piece unwinding roller 11 and winding roller 12 in the present application can also be driven to rotate by a driving motor, so as to realize the release and recovery of the pole piece.

[0060] Alternatively, if Figure 1 As shown, the first coating mechanism and the second coating mechanism in the present application both include a feeding member 8, a transfer roller 7 and a coating roller 6; the release agent is contained in the feeding member 8, and a portion of the transfer roller 7 is immersed in the feeding member 8 and in contact with the release agent; the coating roller 6 is relatively arranged to form a coating gap, and the lithium strip passes through the coating gap to be coated with the release agent.

[0061] like Figure 1 As shown, in the present application, there are two feeding members 8, transfer rollers 7 and coating rollers 6 in the first coating mechanism and the second coating mechanism, and the two coating rollers 6 are arranged opposite to each other to form a coating gap in the present application. The lithium strip can obtain the release agent on the coating roller 6 through the coating gap, so that it can be better separated from the transfer roller 10 during the transfer to the electrode sheet. Correspondingly, since there are two coating rollers 6, there are two transfer rollers 7 and feeding members 8, so that the release agent is coated on both sides of the lithium strip to ensure the smooth transfer of the lithium strip.

[0062] It can be understood that the transfer roller 7 and the coating roller 6 in the present application can both be driven by a motor, and the transfer roller 7 in the present application is in contact with the coating roller 6. Since part of the transfer roller 7 is immersed in the feeding member 8, the release agent in the feeding member 8 can be transferred to the coating roller 6 through the transfer roller 7 and finally adhered to the lithium strip.

[0063] Alternatively, if Figure 1 As shown, the first coating mechanism and the second coating mechanism in the present application also include a scraper assembly, the scraper assembly includes a scraper plate 5 and a second driving member, the scraper plate 5 is arranged in a one-to-one correspondence with the transfer roller 7, and the second driving member can drive the scraper plate 5 to move toward or away from the transfer roller 7.

[0064] By setting a scraper plate 5 and driving the scraper plate 5 to move toward or away from the transfer roller 7 through a second driving member, the amount of release agent dipped onto the transfer roller 7 can be controlled, and the scraper plate 5 can also make the release agent evenly adhere to the transfer roller 7, thereby ensuring the uniformity of the release agent adhered to the lithium belt to a certain extent.

[0065] It should be noted here that the outer surface of the transfer roller 7 in the present application is not a smooth surface, but has numerous tiny holes, so that the release agent in the feeding member 8 can be fully obtained and the release agent can be stably present on the outer surface of the transfer roller 7 to achieve the coating of the release agent.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lithium supplementation device, characterized in that: It includes a lithium belt conveying device, a pole piece conveying device and a release agent coating device; The lithium belt conveying device comprises a first feeding mechanism, a second feeding mechanism, a first transfer mechanism and a second transfer mechanism, wherein the first feeding mechanism conveys the lithium belt to the first transfer mechanism, and the second feeding mechanism conveys the lithium belt to the second transfer mechanism, and the first transfer mechanism and the second transfer mechanism are arranged opposite to each other to form a first material transfer gap; The electrode piece conveying device is arranged corresponding to the first material feeding gap, so that the electrode piece passes through the first material feeding gap; The release agent coating device comprises a first coating mechanism and a second coating mechanism, wherein the first coating mechanism is located between the first feeding mechanism and the first transfer mechanism, and the second coating mechanism is located between the second feeding mechanism and the second transfer mechanism.

2. The lithium replenishment device according to claim 1, characterized in that: The first feeding mechanism and the second feeding mechanism both include an unwinding box and a lithium tape unwinding roller; The lithium tape unwinding roller is arranged in the unwinding box, the lithium tape is wound on the lithium tape unwinding roller, the unwinding box is formed with a discharge port, and the lithium tape is sent out of the unwinding box through the discharge port.

3. The lithium replenishing device according to claim 2, characterized in that: Support rollers are provided between the first feeding mechanism and the first transfer mechanism and between the second feeding mechanism and the second transfer mechanism. The lithium strip is fed out from the discharge port and transferred to the first transfer mechanism and the second transfer mechanism through the support rollers.

4. The lithium replenishing device according to claim 3, characterized in that: It also includes a cutting mechanism, which is located between the lithium strip unwinding roller and the supporting roller and is used for cutting the lithium strip.

5. The lithium replenishing device according to claim 4, characterized in that: The cutting mechanism comprises a first driving member and two cutting members, the two cutting members are arranged oppositely on both sides of the lithium belt to form a cutting gap, and the first driving member can drive the two cutting members to move towards or away from each other.

6. The lithium replenishment device according to claim 1, characterized in that: The first transfer mechanism and the second transfer mechanism both include a calendering roller and a transfer roller, a second material transfer gap is formed between the calendering roller and the transfer roller, and the calendering roller presses the lithium strip onto the transfer roller; The transfer roller of the first transfer mechanism and the transfer roller of the second transfer mechanism are arranged opposite to each other to form the first material transfer gap, and the transfer roller presses the attached lithium ribbon onto the electrode.

7. The lithium replenishing device according to claim 6, characterized in that: The rotation speed of the transfer roller is not less than the rotation speed of the calendering roller.

8. The lithium replenishment device according to claim 1, characterized in that: The pole piece conveying device comprises a pole piece unwinding roller and a winding roller, and the pole piece unwinding roller conveys the pole piece to the winding roller.

9. The lithium replenishment device according to claim 1, characterized in that: The first coating mechanism and the second coating mechanism each include a feeding member, a transfer roller and a coating roller; The release agent is contained in the feeding member, and a portion of the transfer roller is immersed in the feeding member and in contact with the release agent; The coating rollers are arranged opposite to each other to form a coating gap, and the lithium strip passes through the coating gap to be coated with the release agent.

10. The lithium replenishment device according to claim 9, characterized in that: The first coating mechanism and the second coating mechanism further include a scraper assembly, the scraper assembly includes a scraper plate and a second driving member, the scraper plates are arranged in a one-to-one correspondence with the transfer rollers, and the second driving member can drive the scraper plates to move toward or away from the transfer rollers.

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