Splicing apparatus and electrode plate lithium-supplementing system

Abstract

A splicing apparatus and an electrode plate lithium-supplementing system. The splicing apparatus comprises a splicing assembly and a controller, wherein the controller is electrically connected to the splicing assembly and is configured to control the splicing assembly to connect a tail end portion of a first lithium strip with a start end portion of a second lithium strip, the first lithium strip and the second lithium strip both having a start end portion and a tail end portion. In this way, when a lithium strip is replaced, a controller is used to control a splicing assembly, and the splicing assembly connects a tail end portion of a first lithium strip and a start end portion of a second lithium strip into a whole, so that the problems in the prior art of great operation difficulty and time consuming in a manual mode are solved.

Description

Splicing device and electrode lithium replenishment system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311643513X, filed on November 30, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of lithium batteries, and in particular to a splicing device and a pole piece lithium replenishing system. Background Art

[0004] During the rolling process, the lithium replenishment winding equipment (LPD machine, also known as the pole piece lithium replenishment system) can roll the pole piece and lithium ribbon along the thickness direction of the pole piece (or the thickness direction of the lithium ribbon) into a whole. This whole is used in lithium batteries to replenish the lithium ions consumed in the lithium battery. When the old lithium ribbon is used up, the old lithium ribbon is removed and replaced with a new lithium ribbon, so that the new lithium ribbon and pole piece are rolled into a whole. The operation is difficult and time-consuming (i.e., the operation time is long).

[0005] Summary of the Invention

[0006] The main technical problem solved by this application is to provide a splicing device and a pole piece lithium replenishing system to solve the problem that temporary connection of new lithium belts and old lithium belts by manual means is difficult and time-consuming.

[0007] To address the aforementioned technical issues, the first technical solution adopted in this application is to provide a splicing device comprising a splicing assembly and a controller, the controller being electrically connected to the splicing assembly and configured to control the splicing assembly to connect the end of a first lithium ribbon to the beginning of a second lithium ribbon; wherein both the first and second lithium ribbons have a beginning and an end. Thus, when replacing the lithium ribbons, the controller controls the splicing assembly to connect the end of the first lithium ribbon to the beginning of the second lithium ribbon into a single unit (i.e., there is no disconnected portion between the two). This solves the problem of manual operation being difficult and time-consuming in the related art.

[0008] In some embodiments, the splicing assembly includes a pressing mechanism or a welding mechanism configured to press and connect the end of the first lithium ribbon to the beginning of the second lithium ribbon. The welding mechanism is configured to weld the end of the first lithium ribbon to the beginning of the second lithium ribbon. The first lithium ribbon and the second lithium ribbon are connected by welding or pressing.

[0009] In some embodiments, the splicing assembly includes a pressing mechanism comprising a base and a pressing mechanism electrically connected to a controller. The controller is configured to control the pressing mechanism to move toward or away from the base. Thus, the end of the first lithium ribbon and the beginning of the second lithium ribbon are placed on the base, and the controller controls the pressing mechanism to move toward the base. The pressing mechanism and the base cooperate to press and connect the end of the first lithium ribbon with the beginning of the second lithium ribbon.

[0010] In some embodiments, the pressing mechanism further includes a first protective film and / or a second protective film. The first protective film is disposed on at least a portion of a surface of the base proximate to the pressing mechanism. The second protective film is disposed on a surface of the pressing mechanism proximate to the base. The first protective film can reduce damage to the first and second lithium ribbons caused by the base (e.g., surface scratches, bruises, etc.); the second protective film can reduce damage to the first and second lithium ribbons caused by the pressing mechanism (e.g., surface scratches, bruises, etc.).

[0011] In some embodiments, the splicing device further includes a first limiting mechanism electrically connected to the controller; the first limiting mechanism is configured to move to a path where the pressing mechanism approaches the base, or to move away from the path where the pressing mechanism approaches the base; wherein the controller is configured to, in response to receiving a connection start signal, control the first limiting mechanism to move away from the path where the pressing mechanism approaches the base; and, in response to receiving a connection completion signal, control the first limiting mechanism to move to a path where the pressing mechanism approaches the base. In this way, in response to receiving the connection completion signal, the controller controls the first limiting mechanism to be positioned in the path where the pressing mechanism approaches the base, such that the first limiting mechanism can obstruct movement of the pressing mechanism toward the base, thereby preventing the splicing assembly from connecting the first lithium ribbon to the second lithium ribbon. This can avoid the problem of accidentally triggering the splicing assembly due to a contact, which could cause a safety incident. In response to receiving the connection start signal, the controller controls the first limiting mechanism to move away from the path where the pressing mechanism approaches the base, allowing the splicing assembly to move toward the base, thereby connecting the first lithium ribbon to the second lithium ribbon.

[0012] In some embodiments, the splicing device further comprises a shell and a cover, the shell having an operation port, and an inlet and an outlet arranged opposite to each other; the operation port is configured to expose the end portion of the first lithium ribbon and the beginning portion of the second lithium ribbon; when the splicing device is spliced, the end portion of the first lithium ribbon passes through the outlet and is located inside the shell; the beginning portion of the second lithium ribbon passes through the inlet and is located inside the shell; at least part of the splicing assembly is disposed inside the shell. The cover is movably disposed on the shell and is configured to seal or expose the operation port. The provided shell and cover can play a protective role. The operation port facilitates operations by the staff, such as aligning the first and second lithium ribbons; or removing the connecting portion on the first lithium ribbon.

[0013] In some embodiments, the splicing device further includes a locking mechanism electrically connected to the controller; the locking mechanism is configured to lock the cover to the housing. The controller is configured to, in response to the locking mechanism locking the cover to the housing, control the splicing assembly to connect the end of the first lithium ribbon to the beginning of the second lithium ribbon or to restore control of the splicing assembly. Thus, when the locking mechanism is locked, the cover seals the operating port of the housing, allowing the controller to control the splicing assembly, thereby preventing the splicing device from accidentally injuring a worker. When the locking mechanism is unlocked, the cover can rotate, exposing the operating port.

[0014] In some embodiments, the splicing device further includes at least one switch electrically connected to a controller. The controller is configured to control the splicing assembly to connect the end of the first lithium ribbon to the beginning of the second lithium ribbon in response to changes in the states of all switches. This allows the controller to initiate operation of the splicing assembly when the states of all switches change simultaneously. The provision of at least one switch allows for safer operation of the splicing device by the operator.

[0015] In some embodiments, at least one switch is provided in two positions, and the distance between the two switches is greater than 30 cm. This allows two hands to trigger both switches simultaneously to change their states, thereby preventing accidental triggering of a switch and the resulting safety incident.

[0016] In some embodiments, the splicing device further includes a first detection mechanism, an alarm mechanism, and an anti-extrusion member; the first detection mechanism and the alarm mechanism are both electrically connected to a controller; wherein the controller is configured to, in response to the first detection mechanism not detecting that the anti-extrusion member is in a preset position, control the alarm mechanism to sound an alarm; and, in response to detecting that the anti-extrusion member is in a preset position, control the alarm mechanism to stop sounding an alarm. In this way, the coordination of the first detection mechanism, the alarm mechanism, and the anti-extrusion member provides the splicing device with an additional layer of protection, thereby reducing safety incidents caused by accidental contact triggering the splicing device.

[0017] In some embodiments, the splicing device further includes a first fixing mechanism and / or a second fixing mechanism. The first fixing mechanism is configured to restrict movement of the end portion of the first lithium ribbon. The second fixing mechanism is configured to restrict movement of the beginning portion of the second lithium ribbon. In this way, the first fixing mechanism reduces the shaking of the first lithium ribbon, thereby facilitating the splicing of the first and second lithium ribbons. The second fixing mechanism reduces the shaking of the second lithium ribbon, thereby facilitating the splicing of the first and second lithium ribbons.

[0018] In some embodiments, the splicing device includes a first fixing mechanism; the splicing device also includes: a second detection mechanism, the second detection mechanism and the first fixing mechanism are both electrically connected to a controller; the controller is configured to send a stop lithium replenishment signal in response to the second detection mechanism detecting that the first lithium ribbon roll is exhausted, and control the first fixing mechanism to limit the movement of the end portion of the first lithium ribbon. The second detection mechanism can prevent the first lithium ribbon from being exhausted (i.e., the first lithium ribbon and the electrode are completely spliced ​​together), so that the end portion of the first lithium ribbon can be located in the housing, thereby facilitating the splicing of the first lithium ribbon and the second lithium ribbon, thereby resolving the problem of being unable to splice the first lithium ribbon and the second lithium ribbon.

[0019] In some embodiments, the splicing device includes a second fixing mechanism; the splicing device also includes a third detection mechanism, wherein both the third detection mechanism and the second fixing mechanism are electrically connected to a controller; the controller is configured to control the second fixing mechanism to restrict movement of the beginning of the second lithium ribbon in response to the third detection mechanism detecting that the end of the first lithium ribbon is aligned with the beginning of the second lithium ribbon. The third detection mechanism can detect the alignment of the first and second lithium ribbons, thereby resolving the time-consuming manual alignment issue, thereby reducing the alignment time of the first and second lithium ribbons, facilitating the splicing of the first and second lithium ribbons, and improving the efficiency of the splicing of the first and second lithium ribbons.

[0020] In some embodiments, the splicing device further includes: a fourth detection mechanism electrically connected to the controller; the controller is configured to control the first and second fixing mechanisms to release restrictions in response to the fourth detection mechanism detecting that the connection between the end of the first lithium ribbon and the beginning of the second lithium ribbon is complete. The fourth detection mechanism can detect the completion of the connection between the end of the first lithium ribbon and the beginning of the second lithium ribbon, thereby resolving the time-consuming issue of manually observing the completion of the connection between the first and second lithium ribbons. After the first and second fixing mechanisms have reached the restrictions, the first and second lithium ribbons can be rolled together with the electrode sheet.

[0021] In some embodiments, the splicing device further includes a rolling device configured to flatten the end of the first lithium ribbon and / or the beginning of the second lithium ribbon. The rolling device can flatten the lithium ribbons to facilitate alignment and connection of the first and second lithium ribbons.

[0022] In some embodiments, the splicing device further includes a cutting device configured to cut off the portion of the end of the first lithium ribbon to which the connector is attached. The cutting device is used to cut off the portion of the end of the first lithium ribbon to which the connector is attached to prevent the portion from being rolled with the electrode sheet before use in the lithium battery.

[0023] In order to solve the above technical problems, the second technical solution provided by this application is: to provide a pole piece lithium replenishment system, which includes a lithium strip unwinding mechanism, a pole piece unwinding mechanism, a rolling mechanism and a splicing device. The lithium strip unwinding mechanism is configured to replaceably install the first lithium strip or the second lithium strip; the first lithium strip and the second lithium strip both have a starting end and an ending end. The pole piece unwinding mechanism is configured to install the pole piece. The rolling mechanism is configured to squeeze and connect the pole piece and the lithium strip released by the lithium strip unwinding mechanism along the thickness direction of the pole piece. The above-mentioned splicing device is configured to connect the ending end of the first lithium strip with the starting end of the second lithium strip; wherein, the splicing device is located on the path of the released lithium strip from the lithium strip unwinding mechanism to the rolling mechanism. In this way, the provided splicing device can speed up the splicing speed of the first lithium strip and the second lithium strip, thereby improving the splicing efficiency of the lithium strip and the pole piece.

[0024] In some embodiments, the electrode lithium replenishment system further includes a control circuit electrically connected to the controller of the splicing device, the electrode unwinding mechanism, the lithium strip unwinding mechanism, and the rolling mechanism; the control circuit is configured to, in response to receiving a start lithium replenishment signal from the controller, control the electrode unwinding mechanism, the lithium strip unwinding mechanism, and the rolling mechanism to start and coordinate their operation simultaneously; and is further configured to, in response to receiving a stop lithium replenishment signal from the controller, control the electrode unwinding mechanism, the lithium strip unwinding mechanism, and the rolling mechanism to stop operating simultaneously. The provided control circuit can improve the degree of automation of the electrode lithium replenishment system, thereby accelerating the rolling of the electrode and lithium strip.

[0025] In some embodiments, the end of the first lithium ribbon overlaps the beginning of the second lithium ribbon; the overlap is 6 mm to 10 mm along the length of the first lithium ribbon. This allows for a more secure connection between the first and second lithium ribbons while minimizing the space occupied by the first and second lithium ribbons. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] FIG1 is a schematic structural diagram of a splicing device provided by the present application;

[0029] FIG2 is a schematic structural diagram of another splicing device provided by the present application;

[0030] FIG3 is a physical diagram of connecting a first lithium ribbon and a second lithium ribbon using another splicing device of the present application;

[0031] FIG4 is a schematic structural diagram of another splicing device provided by the present application;

[0032] FIG5 is a cross-sectional view of FIG4;

[0033] FIG6 is a schematic structural diagram of another splicing device provided by the present application;

[0034] FIG7 is a front view of FIG6;

[0035] FIG8 is a left side view of FIG6;

[0036] FIG9 is a functional module diagram of a splicing device provided by the present application;

[0037] FIG10 is a functional module diagram of another splicing device provided by the present application;

[0038] FIG11 is a schematic structural diagram of the electrode lithium replenishment system provided in this application;

[0039] FIG12 is a functional module diagram of the electrode lithium replenishment system provided in FIG11 .

[0040] In the figure: 1. splicing device; 10. controller; 111. rolling device; 112. cutting device; 12. splicing assembly; 12a. welding mechanism; 12b. extrusion mechanism; 121. base; 122. pressing mechanism; 123. first fixing mechanism; 124. second fixing mechanism; 125. second protective film; 126. first protective film; 13. shell; 131. operation port; 132. inlet; 133. outlet; 14. cover; 15. locking mechanism; 16. switch; 17. alarm mechanism; 18. first limiting mechanism; 191. first detection mechanism; 192. second detection mechanism; 193. third detection mechanism; 194. fourth detection mechanism; 2. first lithium strip; 3. second lithium strip; 4. lithium strip unwinding mechanism; 5. electrode unwinding mechanism; 6. rolling mechanism; 7. control circuit. DETAILED DESCRIPTION

[0041] The following describes the embodiments of the present application in detail with reference to the accompanying drawings.

[0042] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0043] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0044] The terms "first," "second," and "third" in this application are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of such features. In the description of this application, "multiple" means at least two, for example, two, three, etc., unless otherwise specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative positional relationship, movement, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications also change accordingly. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products, or devices.

[0045] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0046] In the related art, during the rolling process of the lithium replenishment winding equipment (abbreviated as LPD machine, also known as the pole piece lithium replenishment system), the pole piece and the lithium strip can be rolled into a whole along the thickness direction of the pole piece (or the thickness direction of the lithium strip), and the whole is used in the lithium battery to replenish the lithium ions consumed in the lithium battery. When the old lithium strip is used up, the old lithium strip is removed and replaced with a new lithium strip, so that the new lithium strip and the pole piece are rolled into a whole. However, the new lithium strip is temporarily connected to the old lithium strip by manual means, and then rolled with the pole piece; this makes the operation difficult and time-consuming (i.e., the operation time is long).

[0047] In order to solve the problem of difficult and time-consuming manual temporary connection of a new lithium ribbon and an old lithium ribbon, an embodiment of the present disclosure provides a splicing device. Referring to Figures 1 to 10, the splicing device may include a splicing assembly 12 and a controller 10. The controller 10 is electrically connected to the splicing assembly 12, and the controller 10 is configured to control the splicing assembly 12 to connect the end portion of the first lithium ribbon 2 with the beginning portion of the second lithium ribbon 3; wherein the first lithium ribbon 2 and the second lithium ribbon 3 both have a beginning portion and an end portion. In this way, when replacing the lithium ribbon, the controller 10 is used to control the splicing assembly 12, and the splicing assembly 12 connects the end portion of the first lithium ribbon 2 with the beginning portion of the second lithium ribbon 3 into a whole (that is, there is no disconnected part between the two); thereby solving the problem of difficult and time-consuming manual operation in the related art. wherein the first lithium ribbon 2 can be understood as an old lithium ribbon, and the second lithium ribbon 3 can be understood as a new lithium ribbon.

[0048] In addition, after the first lithium ribbon 2 and the second lithium ribbon 3 are connected through the splicing device, the first lithium ribbon 2 and the second lithium ribbon 3 can be connected into a whole (that is, there is no disconnected part between the two); when the whole is rolled with the electrode, the lithium ribbon can be rolled on the surface of the electrode, thereby overcoming the unconnected part (that is, not completely connected, there is a gap) of the first lithium ribbon 2 and the second lithium ribbon 3; and then, when the connected lithium ribbon is rolled with the electrode, the lithium ribbon can be rolled on the surface of the electrode; then, when the electrode is used in a lithium battery, the lithium battery can ionize more lithium ions during the charging and discharging process.

[0049] Exemplarily, the lithium ribbon may have an upper surface and a lower surface relative to each other, and a starting side surface and a finishing side surface. The starting side surface is located between the upper surface and the lower surface and is connected to the upper surface and the lower surface. The finishing side surface is located between the upper surface and the lower surface and is connected to the upper surface and the lower surface. The finishing portion of the lithium ribbon (e.g., the first lithium ribbon 2, and the second lithium ribbon 3) can be understood as the finishing side surface (or finishing face) of the lithium ribbon. The finishing portion of the lithium ribbon can also be understood as the portion of the upper surface and the lower surface of the lithium ribbon that is close to the finishing side surface (or finishing face). The starting portion of the lithium ribbon (e.g., the first lithium ribbon 2, and the second lithium ribbon 3) can be understood with reference to the relevant description of the finishing portion of the lithium ribbon described above.

[0050] The splicing assembly 12 connects the end portion of the first lithium strip 2 with the beginning portion of the second lithium strip 3. It can be understood that the splicing assembly 12 as shown in Figure 1 connects the end side of the first lithium strip 2 with the beginning side of the second lithium strip 3; it can also be understood that the splicing assembly 12 as shown in Figure 2 connects the upper surface (or lower surface) of the first lithium strip 2 close to the end side with the lower surface (or upper surface) of the second lithium strip 3 close to the beginning side.

[0051] Exemplarily, the controller 10 can be a central processing unit (CPU), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0052] In some examples, the splicing device further includes a power supply electrically connected to the splicing assembly 12 and the controller 10. The power supply may also be electrically connected to the electronic devices of the splicing device described below. In other examples, the splicing assembly 12, the controller 10, and the electronic devices in the splicing device may also be electrically connected to the power supply of the electrode lithium replenishment system described below.

[0053] In some embodiments, referring to Figures 1 and 2 , the splicing assembly 12 includes a welding mechanism 12a or a pressing mechanism 12b. The welding mechanism 12a is configured to weld the end of the first lithium ribbon 2 to the beginning of the second lithium ribbon 3. The pressing mechanism 12b is configured to press the end of the first lithium ribbon 2 to the beginning of the second lithium ribbon 3. In this way, the first lithium ribbon 2 and the second lithium ribbon 3 are connected by welding or pressing.

[0054] Exemplarily, the splicing assembly 12 may be a structure capable of connecting the first lithium ribbon 2 with the second lithium ribbon 3 .

[0055] In some examples, referring to FIG. 1 , the splicing assembly 12 may be a welding mechanism 12a, such as an ultrasonic welding mechanism 12a, a laser welding mechanism 12a, or the like. The welding mechanism 12a welds the end of the first lithium ribbon 2 to the beginning of the second lithium ribbon 3. For example, the welding mechanism 12a can weld the end surface (or end side surface) of the first lithium ribbon 2 to the beginning surface (or beginning side surface) of the second lithium ribbon 3, thereby welding the side surfaces of the two. For another example, the welding mechanism 12a can weld the upper surface (or lower surface) of the overlapping first lithium ribbon 2 to the lower surface (or upper surface) of the second lithium ribbon 3, thereby welding the surfaces of the two. During welding, lithium (e.g., liquid lithium, solid lithium, molten lithium, etc.) can be added between the first and second lithium ribbons 2, 3, to improve the strength of the first and second lithium ribbons 2, 3, without damaging them.

[0056] In other examples, referring to FIG2 , the splicing assembly 12 may be a pressing mechanism 12b. The pressing mechanism 12b squeezes and connects the end of the first lithium ribbon 2 with the beginning of the second lithium ribbon 3. For example, the pressing mechanism 12b generates a pressure of 1000 kg to 2000 kg (e.g., 1000 kg, 1100 kg, 1200 kg, 1300 kg, 1400 kg, 1500 kg, 1600 kg, 1800 kg, 2000 kg, etc.) to squeeze the upper surface (or lower surface) of the overlapping first lithium ribbon 2 and the lower surface (or upper surface) of the second lithium ribbon 3 into a connected integral body, as shown in FIG3 . The pressing mechanism 12b is described in detail below.

[0057] In some embodiments, referring to FIG2 , the splicing assembly 12 includes an extrusion mechanism 12b. The extrusion mechanism 12b includes a base 121 and a pressing mechanism 122. The pressing mechanism 122 is electrically connected to the controller 10. The controller 10 is configured to control the pressing mechanism 122 to move closer to or away from the base 121. In this way, the end portion of the first lithium ribbon 2 and the beginning portion of the second lithium ribbon 3 are placed on the base 121, and the controller 10 controls the pressing mechanism 122 to move toward the base 121. The pressing mechanism 122 and the base 121 cooperate to squeeze and connect the end portion of the first lithium ribbon 2 and the beginning portion of the second lithium ribbon 3.

[0058] Exemplarily, the pressing mechanism 122 may include a structure of electrical components. In some examples, the pressing mechanism 122 may include a telescopic mechanism and a pressing member; the pressing member is fixed to the telescopic end of the telescopic mechanism; when the telescopic mechanism is extended or retracted, it can drive the pressing member to move toward the side closer to the base 121 or away from the base 121; the pressing member cooperates with the base 121 to squeeze and connect the end of the first lithium strip 2 with the beginning of the second lithium strip 3. The pressing member has a first surface, which is the surface of the extrusion member closest to the base 121 and is parallel to the plane of the base 121. For example, the extrusion member can be a rectangular parallelepiped, a cube (such as an S-shaped rectangular parallelepiped as shown in Figure 7), etc. The telescopic mechanism can be a pneumatic telescopic mechanism, a hydraulic telescopic mechanism, an electric push rod, a ring-shaped telescopic structure as shown in Figure 7, etc. The telescopic mechanism is connected to the controller 10, so that the controller 10 can control the telescopic mechanism to extend or retract.

[0059] For example, the base 121 has a facing area, and the pressing mechanism 122 faces the facing area. In this way, the end of the first lithium ribbon 2 and the beginning of the second lithium ribbon 3 are placed in the facing area of ​​the base 121. Through the controller 10, the pressing mechanism 122 can squeeze and connect the end of the first lithium ribbon 2 and the beginning of the second lithium ribbon 3.

[0060] In some embodiments, referring again to FIG2 , the pressing mechanism 12b further includes a first protective film 126 and / or a second protective film 125. The first protective film 126 is disposed on at least a portion of a side surface of the base 121 that is adjacent to the pressing mechanism 122. The second protective film 125 is disposed on a side surface of the pressing mechanism 122 that is adjacent to the base 121.

[0061] The first protective film 126 provided can reduce the damage (such as surface scratches, crushing, etc.) caused by the base 121 to the first lithium strip 2 and the second lithium strip 3; the second protective film 125 provided can reduce the damage (such as surface scratches, crushing, etc.) caused by the pressing mechanism 122 to the first lithium strip 2 and the second lithium strip 3.

[0062] In some examples, the material of the first protective film 126 can be resin, rubber, or the like; the resin can be a thermoplastic polyester, such as polyethylene terephthalate (PET). The material of the second protective film 125 can be resin, rubber, or the like; the resin can be a thermoplastic polyester, such as polyethylene terephthalate (PET).

[0063] Exemplarily, the squeezing mechanism 12b further includes a first protective film 126. The first protective film 126 is disposed on at least a portion of a side surface of the base 121 close to the pressing mechanism 122. For example, the first protective film 126 is disposed on the area directly facing the base 121; for another example, the first protective film 126 is disposed on the area directly facing the base 121 and outside the area directly facing the base 121. As another example, the squeezing mechanism 12b further includes a second protective film 125. The second protective film 125 is disposed on a side surface of the pressing mechanism 122 close to the base 121. As another example, the squeezing mechanism 12b further includes a first protective film 126 and a second protective film 125. The first protective film 126 is disposed on at least a portion of a side surface of the base 121 close to the pressing mechanism 122. The second protective film 125 is disposed on a side surface of the pressing mechanism 122 close to the base 121.

[0064] In some embodiments, the splicing device further includes a first limiting mechanism 18. The first limiting mechanism 18 is electrically connected to the controller 10 and is configured to be located on the path of the pressing mechanism 122 approaching the base 121, or to be away from the path of the pressing mechanism 122 approaching the base 121. The controller 10 is configured to, in response to receiving a connection start signal, control the first limiting mechanism 18 to move away from the path of the pressing mechanism 122 approaching the base 121; and, in response to receiving a connection completion signal, control the first limiting mechanism 18 to move to the path of the pressing mechanism 122 approaching the base 121. In this way, in response to receiving the connection completion signal, the controller 10 controls the first limiting mechanism 18 to be located on the path of the pressing mechanism 122 approaching the base 121, so that the first limiting mechanism 18 can hinder the movement of the pressing mechanism 122 toward the base 121, thereby preventing the splicing assembly 12 from connecting the first lithium ribbon 2 to the second lithium ribbon 3. This can prevent accidental contact that could trigger the splicing assembly 12 and cause a safety incident. In response to receiving the connection start signal, the controller 10 controls the first limiting mechanism 18 to move away from the pressing mechanism 122 toward the base 121 , so that the splicing assembly 12 can move toward the base 121 , thereby connecting the first lithium ribbon 2 with the second lithium ribbon 3 .

[0065] The first limiting mechanism 18 may be a telescopic mechanism, which may be a hydraulic telescopic mechanism, a pneumatic telescopic mechanism, an electric push rod, or the like.

[0066] The connection start signal may be a signal received by the controller 10 when the cover 14 and the housing 13 are locked, as described below, or a signal received by the controller 10 when the anti-extrusion member is located in a preset position, as described below. The connection completion signal may be a signal received by the controller 10 when the cover 14 and the housing 13 are unlocked, as described below, or a signal received by the controller 10 when the anti-extrusion member is not located in a preset position, as described below.

[0067] In some embodiments, referring to Figures 4 to 8 , the splicing device further includes a shell 13 and a cover 14. The shell 13 has an operating port 131, as well as an inlet 132 and an outlet 133 disposed opposite each other. The operating port 131 is configured to expose the end of the first lithium ribbon 2 and the beginning of the second lithium ribbon 3. When the splicing device is splicing, the end of the first lithium ribbon 2 passes through the outlet 133 and is located within the shell 13; the beginning of the second lithium ribbon 3 passes through the inlet 132 and is located within the shell 13. The splicing assembly 12 is disposed within the shell 13. The cover 14 is movably disposed on the shell 13 and is configured to cover or expose the operating port 131. In this way, the shell 13 and cover 14 can serve as a protective function. The operating port 131 facilitates operations by the operator, such as aligning the first lithium ribbon 2 and the second lithium ribbon 3; or removing the connection portion on the first lithium ribbon 2.

[0068] For example, referring to Figures 4 and 5, the housing 13 may include opposing bottom and top panels, opposing first and second side panels, and opposing third and fourth side panels; the first, second, third, and fourth side panels are all located on the bottom and top panels and connected to both panels. The operating port 131 may be located on the top panel or the third side panel, and the inlet 132 and outlet 133 may be located on the first and second side panels, respectively.

[0069] As another example, referring to Figures 6 to 8, the shell 13 may include a first frame and a second frame relative to each other, and a top plate and a bottom frame relative to each other; the first frame and the second frame are fixed to the bottom frame, and the top plate is fixed to the first frame and the second frame. The splicing assembly 12 is fixed to the side of the top plate close to the bottom frame, for example, the base 121 is fixed in the bottom frame, and the pressing mechanism 122 is fixed to the side of the top plate close to the bottom frame. At this time, the cavity portions of the first frame and the second frame can be referred to as the inlet 132 and the outlet 133. The space between the first frame and the second frame can be referred to as the operating port 131. The cover body 14 can be rotatably disposed on the first frame and the second frame, so that the cover body 14 can seal the space between the first frame and the second frame.

[0070] The operation port 131 is configured to expose the end of the first lithium ribbon 2 and the beginning of the second lithium ribbon 3. It can be understood that the end of the first lithium ribbon 2 and the beginning of the second lithium ribbon 3 can be seen and operated through the operation port 131. The cover 14 is movably mounted on the housing 13; for example, the cover 14 is rotatably mounted on the housing 13 (e.g., the top plate) via a hinge or a rotating shaft. Opening the cover 14 exposes the operation port 131; closing the cover 14 covers the operation port 131.

[0071] In some examples, for example, the mounting portion of the welding mechanism 12a can be disposed outside the housing 13, and the welding portion of the welding mechanism 12a is located inside the housing 13. In another example, both the mounting portion and the welding portion of the welding mechanism 12a can be disposed inside the housing 13. The welding portion is used to weld the first lithium ribbon 2 and the second lithium ribbon 3. In other examples, for example, the base 121 of the extrusion mechanism 12b can be disposed inside the housing 13 (or bottom plate). In another example, the base 121 can be part of the housing 13 (e.g., bottom plate). The telescopic mechanism of the pressing mechanism 122 is disposed inside the housing 13, and the pressing member is located inside the housing 13.

[0072] When the splicing device is splicing, the end of the first lithium ribbon 2 passes through the outlet 133 and is located inside the shell 13; the beginning of the second lithium ribbon 3 passes through the inlet 132 and is located inside the shell 13. It can be understood that during normal use, the first lithium ribbon 2 passes through the inlet 132 and the outlet 133 at the same time, and is rolled into a whole with the electrode. When the first lithium ribbon 2 is almost used up (i.e., the end of the first lithium ribbon 2 passes through the inlet 132 from outside the shell 13 and is located inside the shell 13, at this time the end of the first lithium ribbon 2 is located in the shell 13 and the movement of the first lithium ribbon 2 is stopped), the beginning of the second lithium ribbon 3 is passed from outside the shell 13 through the inlet 132 and into the shell 13.

[0073] In some embodiments, referring to FIG9 , the splicing device further includes a locking mechanism 15 , which is electrically connected to the controller 10 ; the locking mechanism 15 is configured to lock the cover 14 to the housing 13 . The controller 10 is configured to, in response to the locking mechanism 15 locking the cover 14 to the housing 13 , control the splicing assembly 12 to connect the end of the first lithium ribbon 2 to the beginning of the second lithium ribbon 3 or to restore the control function of the splicing assembly 12 . In this way, when the locking mechanism 15 is locked, the cover 14 seals the operating port 131 of the housing 13 , and the controller 10 will control the splicing assembly 12 , thereby preventing the splicing device from accidentally injuring a worker. When the locking mechanism 15 is not locked, the cover 14 can rotate to expose the operating port 131 .

[0074] Exemplarily, the controller 10 is further configured to control the splicing assembly 12 to stop moving or cut off the control function of the splicing assembly 12 in response to the locking mechanism 15 not locking the cover 14 and the shell 13. In this way, when the locking mechanism 15 is not locked, the splicing assembly 12 does not move, thereby not causing damage such as pressing to the operator, thereby protecting the operator. For the sake of simplicity, the control of the splicing assembly 12 to start moving in this article can be understood as controlling the splicing assembly 12 to connect the end portion of the first lithium strip 2 with the beginning portion of the second lithium strip 3. The control of the splicing assembly 12 to stop moving in this article, for example, controls the splicing assembly 12 to disconnect the end portion of the first lithium strip 2 from the beginning portion of the second lithium strip 3.

[0075] The locking mechanism 15 can be a safety lock, a smart lock (such as a smart electronic lock, a smart IoT lock, an optical smart lock, etc.), etc.

[0076] The controller 10 is configured to lock the cover 14 and the shell 13 in response to the locking mechanism 15, and control the splicing assembly 12 to connect the end of the first lithium strip 2 with the beginning of the second lithium strip 3; it can be understood that when the locking mechanism 15 is locked, a corresponding locking signal is generated and transmitted to the controller 10, and the controller 10 controls the splicing assembly 12 to start action according to the locking signal.

[0077] Exemplarily, the locking mechanism 15 may include a first lock body, a sensor, a trigger plate, and a second lock body. The sensor is disposed on the first lock body and is connected to the controller 10; the trigger plate is disposed on the second lock body; the first lock body is mounted on the housing 13, and the second lock body is mounted on the cover 14. When the first and second lock bodies are locked, the sensor and trigger plate cooperate to generate a corresponding first sensing signal, which is transmitted to the controller 10. The controller 10 controls the splicing assembly 12 to start operation based on the first sensing signal. When the first and second lock bodies are not locked, the sensor and trigger plate separate, causing the sensor to generate a corresponding second sensing signal, which is transmitted to the controller 10. The controller 10 controls the splicing assembly 12 to stop operation based on the second sensing signal.

[0078] In some examples, the inductor can be a coil and the trigger plate can be an iron core. The combination of the inductor and the trigger plate can be understood as inserting an iron core into the coil, thereby enhancing the coil's magnetism and increasing the current. The first induced signal can be a magnetic signal (or a current signal). Separating the inductor and trigger plate weakens the coil's magnetism and reduces the current. The second induced signal can be a magnetic signal (or a current signal).

[0079] The controller 10 is configured to lock the cover 14 to the housing 13 in response to the locking mechanism 15, thereby restoring the control function of the splicing assembly 12. It can be understood that the locking mechanism 15 has the function of locking the housing 13 and the cover 14, and also has the function of disconnecting or connecting the splicing assembly 12 and the controller 10. That is, when the locking mechanism 15 is locked, the locking mechanism 15 also connects the splicing assembly 12 and the controller 10, so that the controller 10 can restore the ability to control the splicing assembly 12.

[0080] The locking mechanism is locked, and a corresponding locking signal is generated and transmitted to the controller 10 . The controller 10 controls the splicing assembly 12 to start the action or restore the control function.

[0081] Exemplarily, the locking mechanism 15 may include a first lock body, a sensor, a trigger plate, and a second lock body; the sensor is disposed on the first lock body; the sensor is connected to the controller 10 and to the splicing assembly 12 (i.e., the controller 10, the sensor, and the splicing assembly 12 are connected in series); the trigger plate is disposed on the second lock body; the first lock body is mounted on the housing 13, and the second lock body is mounted on the cover 14; when the first lock body and the second lock body are locked, the sensor cooperates with the trigger plate, causing the sensor to connect the controller 10 to the splicing assembly 12, thereby allowing the controller 10 to regain control of the splicing assembly 12. When the first lock body and the second lock body are unlocked, the sensor plate and the trigger plate separate, causing the sensor to disconnect the controller 10 from the splicing assembly 12, thereby causing the controller 10 to lose control of the splicing assembly 12.

[0082] In some examples, the sensor can be a trigger switch 16. The sensor works in conjunction with the trigger plate, which can be understood as the trigger plate pressing the trigger switch 16, turning the trigger switch 16 on, thereby connecting the circuit between the controller 10 and the splicing assembly 12, and thus restoring the controller 10's ability to control the splicing assembly 12. When the sensor plate separates from the trigger plate, the trigger switch 16 returns to the closed state due to its own elastic force, thereby disconnecting the circuit between the controller 10 and the splicing assembly 12, and the controller 10 loses its ability to control the splicing assembly 12.

[0083] In other examples, the sensor may be at least one switch 16 described below. Only when the states of all switches 16 are changed will the controller 10 resume the control function of the splicing assembly 12.

[0084] In some embodiments, referring again to FIG. 9 , the splicing device further includes at least one (e.g., one, or more) switch 16 , which is electrically connected to the controller 10 . The controller 10 is configured to control the splicing assembly 12 to connect the end of the first lithium ribbon 2 to the beginning of the second lithium ribbon 3 in response to a change in the state of all switches 16 . Thus, when the states of all switches 16 change simultaneously, the controller 10 controls the splicing assembly 12 to initiate operation. The provision of at least one switch 16 allows the operator to operate the splicing device more safely.

[0085] All switches 16 change state, generate corresponding state change signals, and transmit them to the controller 10. The controller 10 controls the splicing assembly 12 to start action.

[0086] Exemplarily, the switch 16 can be a switch 16 capable of sending a signal, and the switch 16 can be a trigger switch 16 (also referred to as a tactile switch 16). The switch 16 is connected to the controller 10 and is not connected to the splicing assembly 12. When all the switches 16 are pressed to trigger, the states of all the switches 16 change, corresponding trigger signals are generated, and all the trigger signals are sent to the controller 10. The controller 10 controls the splicing assembly 12 to start action based on all the received trigger signals. When any switch 16 is released, the released switch 16 returns to its initial state, generates a corresponding initial signal, and sends it to the controller 10; the controller 10 controls the splicing assembly 12 to stop action based on at least one received initial signal.

[0087] As another example, the switch 16 can be a switch capable of disconnecting or connecting a function, such as a knife switch or circuit breaker. The switch 16 is connected to the controller 10 and is also electrically connected to the splicing assembly 12; that is, the controller 10, at least one switch 16, and the splicing assembly 12 are connected in series. When all switches 16 are closed, the circuit between the controller 10 and the splicing assembly 12 is completed, allowing the controller 10 to control the splicing assembly 12 to begin operation. When at least one switch 16 is open, the circuit between the controller 10 and the splicing assembly 12 is disconnected, causing the controller 10 to lose control of the splicing assembly 12 and the splicing assembly 12 to cease operation.

[0088] In some embodiments, the at least one switch 16 is provided in two positions, and the distance between the two switches 16 is greater than or equal to 30 cm (for example, the distance between the two switches 16 can be 30 cm, 40 cm, 50 cm, 60 cm, 70 cm, 80 cm, 90 cm, 100 cm, 150 cm, 200 cm, etc.). In this manner, the two switches 16 require simultaneous activation by two hands to change their states, thereby preventing accidental activation of one switch 16 and the resulting safety incident.

[0089] In some embodiments, referring again to FIG9 , the splicing device further includes a first detection mechanism 191, an alarm mechanism 17, and an anti-extrusion member; both the first detection mechanism 191 and the alarm mechanism 17 are electrically connected to the controller 10; the controller 10 is configured to, in response to the first detection mechanism 191 not detecting that the anti-extrusion member is in the preset position, control the alarm mechanism 17 to sound an alarm; and in response to detecting that the anti-extrusion member is in the preset position, control the alarm mechanism 17 to stop sounding the alarm. In this way, the coordination of the first detection mechanism 191, the alarm mechanism 17, and the anti-extrusion member provides the splicing device with an additional layer of protection, thereby reducing safety incidents caused by accidental contact.

[0090] The alarm mechanism 17 can be at least one of a text alarm (such as a display screen), a voice alarm (such as a speaker), and a signal light alarm. For example, when the alarm mechanism 17 is a text alarm, the text alarm issues a prompt text, etc. For example, when the alarm mechanism 17 is a voice alarm, the voice alarm issues a prompt voice, etc. The preset position can be understood as the position where the anti-detection member is placed; for example, the preset position can be a part in the above-mentioned housing 13, or a part in the base 121. The anti-extrusion member can be detected by the first detection mechanism 191. The first detection mechanism 191 can be a sensor (such as an infrared sensor), a camera, a barcode scanner, etc. The anti-extrusion member is located at the preset position, the first detection mechanism 191 detects the anti-extrusion member, generates a corresponding first detection signal, and transmits it to the controller 10, and the controller 10 controls the splicing assembly 12 to start action. For example, when the first detection mechanism 191 is a barcode scanner, a barcode is provided on the corresponding anti-extrusion member, and the barcode scanner can scan the barcode to produce a corresponding barcode signal (first detection signal), and transmit it to the controller 10, and the controller 10 controls the alarm mechanism 17 to stop the alarm. For example, when the first detection mechanism 191 is a camera, the camera can take a picture of the anti-extrusion part, generate a corresponding picture signal (first detection signal), and transmit it to the controller 10, and the controller 10 controls the alarm mechanism 17 to stop the alarm.

[0091] In one possible implementation, the splicing device may include a locking mechanism, a first limiting mechanism 18, at least one switch 16, and an anti-extrusion member. The splicing device may have a quadruple protection function, thereby making the splicing device safer. The quadruple protection function may be: the anti-extrusion member is located at a preset position, the first detection mechanism 191 detects the anti-extrusion member, generates a corresponding first detection signal, and transmits it to the controller 10, and the controller 10 controls the alarm mechanism 17 to stop the alarm; the locking mechanism locks, generates a corresponding locking signal, and transmits it to the controller 10; the first limiting mechanism 18 moves away from the pressing mechanism 122 to a path close to the base 121, generates a corresponding departure signal, and transmits it to the controller 10; all switches 16 change state, generate corresponding state change signals, and transmit them to the controller 10. The controller 10 controls the splicing assembly 12 to start action based on the locking signal, departure signal, and state change signal received in sequence.

[0092] In some embodiments, as shown in FIG10 , the splicing device further includes a first fixing mechanism 123 and / or a second fixing mechanism 124. The first fixing mechanism 123 is configured to restrict movement of the end of the first lithium ribbon 2; the second fixing mechanism 124 is configured to restrict movement of the beginning of the second lithium ribbon 3. In this way, the first fixing mechanism 123 reduces the wobbling of the first lithium ribbon 2, thereby facilitating the splicing of the first and second lithium ribbons 2, 3. The second fixing mechanism 124 reduces the wobbling of the second lithium ribbon 3, thereby facilitating the splicing of the first and second lithium ribbons 2, 3.

[0093] The first fixing mechanism 123 can be a telescopic mechanism, a holding mechanism, a magnetic mechanism, or the like. For example, the telescopic mechanism can press the end of the first lithium ribbon 2 against the base 121. Another example is a holding mechanism that can hold the end of the first lithium ribbon 2 in place. The second fixing mechanism 124 can be a telescopic mechanism, a holding mechanism, a magnetic mechanism, or the like. In some examples, the first fixing mechanism 123 and the second fixing mechanism 124 can be the same mechanism, for example, both telescopic mechanisms or both holding mechanisms.

[0094] Exemplarily, the splicing device further includes a first fixing mechanism 123, which is configured to limit the movement of the end portion of the first lithium ribbon 2. Exemplarily, the splicing device further includes a second fixing mechanism 124, which is configured to limit the movement of the beginning portion of the second lithium ribbon 3. Exemplarily, the splicing device further includes a first fixing mechanism 123 and a second fixing mechanism 124, wherein the first fixing mechanism 123 is configured to limit the movement of the end portion of the first lithium ribbon 2; and the second fixing mechanism 124 is configured to limit the movement of the beginning portion of the second lithium ribbon 3.

[0095] In some examples, the first fixing mechanism 123 can be installed in the housing 13 and directly opposite the base 121. In this way, the first fixing mechanism 123 can be used to fix the first lithium ribbon 2 to the base 121. The second fixing mechanism 124 can be installed in the housing 13 and directly opposite the base 121. In this way, the second fixing mechanism 124 can be used to fix the second lithium ribbon 3 to the base 121.

[0096] In some embodiments, referring to FIG10 , the splicing device includes a first fixing mechanism 123; the splicing device also includes a second detection mechanism 192, and the second detection mechanism 192 and the first fixing mechanism 123 are both electrically connected to the controller 10; the controller 10 is configured to send a stop lithium replenishment signal in response to the second detection mechanism 192 detecting that the first lithium ribbon 2 is exhausted, and control the first fixing mechanism 123 to limit the movement of the end portion of the first lithium ribbon 2. The second detection mechanism 192 can prevent the first lithium ribbon 2 from being exhausted (i.e., the first lithium ribbon 2 and the electrode are all spliced ​​together), so that the end portion of the first lithium ribbon 2 can be located in the housing 13, thereby facilitating the splicing of the first lithium ribbon 2 and the second lithium ribbon 3, thereby solving the problem of being unable to splice the first lithium ribbon 2 and the second lithium ribbon 3.

[0097] The second detection mechanism 192 is configured to detect whether the first lithium ribbon 2 is exhausted. The second detection mechanism 192 can be a sensor (e.g., an infrared sensor), a camera, a barcode scanner, etc. For example, if the second detection mechanism 192 is a camera, the camera captures a photo of the end of the first lithium ribbon 2, generates corresponding photo information of the end of the first lithium ribbon 2, and transmits it to the controller 10. The controller 10 then controls the first securing mechanism 123 to secure the end of the first lithium ribbon 2. For another example, if the second detection mechanism 192 is a barcode scanner, the end of the first lithium ribbon 2 is provided with a barcode. The barcode scanner scans the barcode on the end of the first lithium ribbon 2, generates a corresponding barcode signal, and transmits it to the controller 10. The controller 10 then controls the first securing mechanism 123 to secure the end of the first lithium ribbon 2.

[0098] Sending a stop lithium replenishment signal can stop the operation of the electrode lithium replenishment system described below, thereby avoiding the problem that the rolling mechanism 6 will continue to drive the first lithium strip 2 to move.

[0099] In some embodiments, referring again to FIG. 10 , the splicing device includes a second fixing mechanism 124; the splicing device also includes a third detection mechanism 193, and both the third detection mechanism 193 and the second fixing mechanism 124 are electrically connected to the controller 10. The controller 10 is configured to control the second fixing mechanism 124 to restrict movement of the beginning of the second lithium ribbon 3 in response to the third detection mechanism 193 detecting that the end of the first lithium ribbon 2 is aligned with the beginning of the second lithium ribbon 3. The third detection mechanism 193 can detect the alignment of the first lithium ribbon 2 and the second lithium ribbon 3, thereby resolving the time-consuming manual alignment issue, thereby reducing the alignment time of the first lithium ribbon 2 and the second lithium ribbon 3, facilitating the splicing of the first lithium ribbon 2 and the second lithium ribbon 3, and improving the splicing efficiency of the first lithium ribbon 2 and the second lithium ribbon 3.

[0100] The third detection mechanism 193 is configured to detect whether the end of the first lithium ribbon 2 is aligned with the beginning of the second lithium ribbon 3. The third detection mechanism 193 can be a sensor (e.g., an infrared sensor), a camera, or the like. For example, if the third detection mechanism 193 is a camera, when the camera captures the alignment of the end of the first lithium ribbon 2 and the beginning of the second lithium ribbon 3, it generates a corresponding alignment image signal and transmits it to the controller 10. The controller 10 then controls the second fixing mechanism 124 to fix the beginning of the second lithium ribbon 3.

[0101] When the distance between the side surface of the first lithium ribbon 2 and the side surface of the second lithium ribbon 3 along the width direction of the first lithium ribbon 2 is between -1 mm and 1 mm, it can be understood that the first lithium ribbon 2 and the second lithium ribbon 3 are aligned.

[0102] In some embodiments, referring again to FIG. 10 , the splicing device further includes a fourth detection mechanism 194 electrically connected to the controller 10 ; the controller 10 is configured to control the first fixing mechanism 123 and the second fixing mechanism 124 to release the restrictions in response to the fourth detection mechanism 194 detecting that the connection between the end of the first lithium ribbon 2 and the beginning of the second lithium ribbon 3 is complete. The fourth detection mechanism 194 can detect the completion of the connection between the end of the first lithium ribbon 2 and the beginning of the second lithium ribbon 3 , thereby resolving the time-consuming issue of manually observing the completion of the connection between the first lithium ribbon 2 and the second lithium ribbon 3 ; after the first fixing mechanism 123 and the second fixing mechanism 124 contact the restrictions, the entire first and second lithium ribbons 2 and 3 can be rolled together with the electrode.

[0103] The fourth detection mechanism 194 is configured to detect whether the end of the first lithium ribbon 2 and the beginning of the second lithium ribbon 3 are connected. The fourth detection mechanism 194 can be a sensor (e.g., an infrared sensor), a camera, or the like. For example, if the fourth detection mechanism 194 is a camera, when the camera captures the connection between the end of the first lithium ribbon 2 and the beginning of the second lithium ribbon 3, it generates a corresponding photo signal indicating the connection is complete and transmits it to the controller 10. The controller 10 then controls the first fixing mechanism 123 and the second fixing mechanism 124 to release the connection.

[0104] Exemplarily, the controller 10 also sends a lithium replenishment start signal, so that the control circuit 7 described below controls the electrode lithium replenishment system to start working according to the received lithium replenishment start signal.

[0105] In some embodiments, referring to FIG5 , the splicing device further includes a rolling device 111 configured to flatten the end of the first lithium ribbon 2 and / or the beginning of the second lithium ribbon 3. The rolling device 111 can be used to flatten the lithium ribbons, thereby facilitating alignment and connection of the first lithium ribbon 2 and the second lithium ribbon 3.

[0106] The rolling device 111 may include a roller and a pushing mechanism for pushing the roller. For example, the pushing mechanism is mounted on the housing 13 and can push the roller so that the roller can flatten the lithium ribbon.

[0107] Exemplarily, the splicing device further includes a rolling device 111, which is configured to flatten the end portion of the first lithium ribbon 2. Exemplarily, the splicing device further includes a rolling device 111, which is configured to flatten the beginning portion of the second lithium ribbon 3. Exemplarily, the splicing device further includes a rolling device 111, which is configured to flatten the end portion of the first lithium ribbon 2 and the beginning portion of the second lithium ribbon 3.

[0108] In some embodiments, referring again to FIG5 , the splicing device further includes a cutting device 112 configured to cut off the portion of the end portion of the first lithium ribbon 2 to which the connecting portion is attached. The cutting device 112 is used to cut off the portion of the end portion of the first lithium ribbon 2 to which the connecting portion is attached to prevent the portion from being rolled with the electrode sheet and then used in the lithium battery.

[0109] The cutting device 112 can be a blade, such as a pair of scissors or a hot melt knife. The cutting device 112 can be mounted within the housing 13. The connecting portion can be adhesive tape, double-sided tape, or the like. The connecting portion is used to temporarily attach the ends of the lithium ribbon to form a loop, allowing the lithium ribbon to be rolled into a roll. This facilitates installation on the lithium ribbon unwinding mechanism 4 described below. When the lithium ribbon is nearly exhausted, the loop separates, and the connecting portion is located at the end of the lithium ribbon.

[0110] The embodiments of the present disclosure also provide a pole piece lithium replenishment system. Referring to Figures 11 and 12, the pole piece lithium replenishment system includes a lithium strip unwinding mechanism 4, a pole piece unwinding mechanism 5, a rolling mechanism 6, and a splicing device 1. The lithium strip unwinding mechanism 4 is configured to interchangeably install a first lithium strip 2 or a second lithium strip 3; the first lithium strip 2 and the second lithium strip 3 each have a starting end and an ending end; the pole piece unwinding mechanism 5 is configured to install the pole piece; the rolling mechanism 6 is configured to squeeze and connect the pole piece with the lithium strip released by the lithium strip unwinding mechanism 4 along the thickness direction of the pole piece; the splicing device 1 is configured to connect the ending end of the first lithium strip 2 with the starting end of the second lithium strip 3; wherein the splicing device 1 is located on the path of the released lithium strip from the lithium strip unwinding mechanism 4 to the rolling mechanism 6. In this way, the splicing device 1 can speed up the splicing speed of the first lithium strip 2 and the second lithium strip 3, thereby improving the splicing efficiency of the lithium strip and the pole piece.

[0111] The lithium ribbon unwinding mechanism 4 may include a first rotating shaft. Both the first lithium ribbon 2 and the second lithium ribbon 3 may be rolled lithium ribbons; the rolled lithium ribbons are mounted on the first rotating shaft to facilitate the release of the lithium ribbons. The lithium ribbon unwinding mechanism 4 is configured to interchangeably mount the first lithium ribbon 2 or the second lithium ribbon 3. It can be understood that when the first lithium ribbon 2 is nearly exhausted, the first lithium ribbon 2 is removed from the lithium ribbon unwinding mechanism 4, wherein the end portion of the first lithium ribbon 2 can be unwound and the connecting portion removed; and the second lithium ribbon 3 is mounted on the lithium ribbon unwinding mechanism 4.

[0112] The pole piece unwinding mechanism 5 may include a second rotating shaft, and the pole piece may be a rolled pole piece; the rolled pole piece may be installed on the pole piece unwinding mechanism 5 .

[0113] The rolling mechanism 6 may include a pair of rollers that rotate in opposite directions. The electrode sheet and the released lithium ribbon pass between the rollers, so that the rollers squeeze the electrode sheet and the released lithium ribbon along the thickness direction of the electrode sheet to form a whole. This whole can be used in a lithium battery. Thus, during the charging and discharging process of the lithium battery, the lithium ribbon can replenish the consumed lithium ions.

[0114] The splicing device 1 is located on the path of the released lithium ribbon from the lithium ribbon unwinding mechanism 4 to the rolling mechanism 6. For example, the splicing device 1 is located between the lithium ribbon unwinding mechanism 4 and the rolling mechanism 6. The released lithium ribbon can be understood as the first lithium ribbon 2, the second lithium ribbon 3, or the overlapping portion of the first lithium ribbon 2 and the second lithium ribbon 3.

[0115] In some examples, the electrode lithium replenishment system further includes a workbench, and the splicing device 1, the electrode unwinding mechanism 5, the lithium strip unwinding mechanism 4 and the rolling mechanism 6 are all installed on the workbench.

[0116] In some embodiments, the electrode lithium replenishment system further includes a control circuit 7, which is electrically connected to the controller 10 of the splicing device 1, the electrode unwinding mechanism 5, the lithium strip unwinding mechanism 4, and the rolling mechanism 6; the control circuit 7 is configured to control the electrode unwinding mechanism 5, the lithium strip unwinding mechanism 4, and the rolling mechanism 6 to start and coordinate in response to receiving a start lithium replenishment signal from the controller 10. The control circuit 7 is also configured to control the electrode unwinding mechanism 5, the lithium strip unwinding mechanism 4, and the rolling mechanism 6 to stop working in response to receiving a stop lithium replenishment signal from the controller 10. The set control circuit 7 can improve the degree of automation of the electrode lithium replenishment system, thereby speeding up the rolling of the electrode and the lithium strip.

[0117] The electrode unwinding mechanism 5 may include a first motor connected to a first rotating shaft and capable of driving the first rotating shaft to rotate. The lithium strip unwinding mechanism 4 may include a second motor connected to a second rotating shaft and capable of driving the second rotating shaft to rotate. The rolling mechanism 6 may include a third motor connected to the dual rollers and capable of driving the dual rollers to rotate. The first, second, and third motors are all electrically connected to a control circuit 7.

[0118] The control circuit 7 may be at least one of a central processing unit (CPU), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, and discrete hardware components. The control circuit 7 may also include other electronic components.

[0119] In some examples, the electrode lithium replenishment system further includes a power supply, and the control circuit 7, the splicing device 1, the electrode unwinding mechanism 5, the lithium strip unwinding mechanism 4 and the rolling mechanism 6 are all electrically connected to the power supply.

[0120] In some embodiments, the end of the first lithium ribbon 2 overlaps the beginning of the second lithium ribbon 3; along the length of the first lithium ribbon 2, the overlap is 6 mm to 10 mm (e.g., 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc.). This allows for a more secure connection between the first and second lithium ribbons 2, 3 while occupying less space.

[0121] The above description is only an implementation method of the present application and does not limit the scope of patent protection of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of the present application.

Claims

1. A splicing device, wherein: include: Splicing components; as well as, The controller is electrically connected to the splicing assembly and is configured to control the splicing assembly to connect the end portion of the first lithium ribbon with the beginning portion of the second lithium ribbon; wherein the first lithium ribbon and the second lithium ribbon both have a beginning portion and an end portion.

2. The splicing device according to claim 1, wherein: The splicing assembly comprises: A pressing mechanism is configured to press and connect the end portion of the first lithium strip with the beginning portion of the second lithium strip; or, The welding mechanism is configured to connect the end portion of the first lithium ribbon to the beginning portion of the second lithium ribbon by welding.

3. The splicing device according to claim 2, wherein: The splicing assembly includes an extrusion mechanism, and the extrusion mechanism includes: a base; and, A pressing mechanism, electrically connected to the controller; Wherein, the controller is configured to control the pressing mechanism to move closer to or away from the base.

4. The splicing device according to claim 3, wherein: The extrusion mechanism also includes: A first protective film is disposed on at least a portion of a surface of a side of the base close to the pressing mechanism; and / or, The second protective film is arranged on a surface of one side of the pressing mechanism close to the base.

5. The splicing device according to claim 3 or 4, wherein: The splicing device also includes: a first limiting mechanism electrically connected to the controller; the first limiting mechanism being configured to move to a path where the pressing mechanism approaches the base, or to move away from a path where the pressing mechanism approaches the base; Wherein, the controller is configured to, in response to receiving a connection start signal, control the first limiting mechanism to move away from the path of the pressing mechanism approaching the base; and, in response to receiving a connection completion signal, control the first limiting mechanism to move to the path of the pressing mechanism approaching the base.

6. The splicing device according to any one of claims 1 to 5, wherein: The splicing device also includes: A shell having an operation port, and an inlet and an outlet arranged opposite to each other; the operation port is configured to expose the end of the first lithium strip and the beginning of the second lithium strip; when the splicing device is splicing, the end of the first lithium strip passes through the outlet and is located in the shell; the beginning of the second lithium strip passes through the inlet and is located in the shell; at least part of the splicing assembly is arranged in the shell; and, The cover body is movably arranged on the shell body and is configured to cover or expose the operation port.

7. The splicing device according to claim 6, wherein: The splicing device also includes: A locking mechanism electrically connected to the controller; the locking mechanism is configured to lock the cover body with the housing; The controller is configured to, in response to the locking mechanism locking the cover body with the shell, control the splicing assembly to connect the end of the first lithium belt with the beginning of the second lithium belt or restore the control function of the splicing assembly.

8. The splicing device according to any one of claims 1 to 7, wherein: The splicing device also includes: at least one switch electrically connected to the controller; The controller is configured to control the splicing assembly to connect the end portion of the first lithium ribbon with the beginning portion of the second lithium ribbon in response to a change in the state of all the switches.

9. The splicing device according to claim 8, wherein: The number of the at least one switch is two, and the distance between the two switches is greater than 30 cm.

10. The splicing device according to any one of claims 1 to 9, wherein: The splicing device further comprises: a first detection mechanism, an alarm mechanism and an anti-extrusion member; the first detection mechanism and the alarm mechanism are both electrically connected to the controller; Wherein, the controller is configured to, in response to the first detection mechanism not detecting that the anti-extrusion member is located at the preset position, control the alarm mechanism to sound an alarm; and in response to detecting that the anti-extrusion member is located at the preset position, control the alarm mechanism to stop sounding the alarm.

11. The splicing device according to any one of claims 1 to 10, wherein: The splicing device also includes: a first fixing mechanism, configured to limit movement of the end portion of the first lithium ribbon; and / or The second fixing mechanism is configured to restrict movement of the leading end portion of the second lithium ribbon.

12. The splicing device according to claim 11, wherein: The splicing device includes the first fixing mechanism; the splicing device also includes: A second detection mechanism, wherein the second detection mechanism and the first fixing mechanism are both electrically connected to the controller; the controller is configured to send a stop lithium replenishment signal in response to the second detection mechanism detecting that the first lithium ribbon roll is exhausted, and control the first fixing mechanism to limit the movement of the end portion of the first lithium ribbon.

13. The splicing device according to claim 12, wherein: The splicing device includes the second fixing mechanism; the splicing device also includes: a third detection mechanism, wherein the third detection mechanism and the second fixing mechanism are both electrically connected to the controller; and the controller is configured to control the second fixing mechanism to limit the movement of the starting end of the second lithium belt in response to the third detection mechanism detecting that the end of the first lithium belt is aligned with the starting end of the second lithium belt.

14. The splicing device according to claim 13, wherein: The splicing device also includes: A fourth detection mechanism is electrically connected to the controller; the controller is configured to control the first fixing mechanism and the second fixing mechanism to release restrictions in response to the fourth detection mechanism detecting that the connection between the end portion of the first lithium belt and the beginning portion of the second lithium belt is completed.

15. The splicing device according to any one of claims 1 to 14, wherein: The splicing device also includes: The rolling device is configured to flatten the end portion of the first lithium ribbon and / or the beginning portion of the second lithium ribbon.

16. The splicing device according to any one of claims 1 to 15, wherein: The splicing device also includes: The cutting device is configured to cut off a portion of the end portion of the first lithium ribbon to which the connecting portion is attached.

17. A lithium replenishing system for an electrode, wherein: include: A lithium ribbon unwinding mechanism, configured to replaceably install the first lithium ribbon or the second lithium ribbon; The first lithium strip and the second lithium strip each have a starting end and an ending end; A pole piece unwinding mechanism, configured to install the pole piece; A rolling mechanism is configured to squeeze and connect the pole piece and the lithium strip released by the lithium strip unwinding mechanism along the thickness direction of the pole piece; and The splicing device according to any one of claims 1 to 16, configured to connect the end portion of the first lithium strip to the beginning portion of the second lithium strip; wherein the splicing device is located between the released lithium strip from the lithium strip unwinding mechanism to the rolling mechanism on the path.

18. The electrode lithium replenishment system according to claim 17, wherein: Also includes: A control circuit, electrically connected to the controller of the splicing device, the electrode unwinding mechanism, the lithium strip unwinding mechanism and the rolling mechanism; The control circuit is configured to, in response to receiving a start lithium replenishment signal from the controller, control the pole piece unwinding mechanism, the lithium strip unwinding mechanism and the rolling mechanism to start and coordinate their work synchronously; and is also configured to, in response to receiving a stop lithium replenishment signal from the controller, control the pole piece unwinding mechanism, the lithium strip unwinding mechanism and the rolling mechanism to stop working synchronously.

19. The electrode lithium replenishment system according to claim 17 or 18, wherein: There is an overlapping portion between the end of the first lithium strip and the beginning of the second lithium strip; along the length direction of the first lithium strip, the size of the overlapping portion is 6 mm to 10 mm.

Images