A composite tape manufacturing apparatus

Abstract

The utility model discloses a kind of composite material belt preparation devices, it is related to battery production equipment field.The composite material belt preparation device includes copper foil unwinding wheel, material belt winding wheel, composite counter roller and lithium foil processing mechanism, copper foil unwinding wheel is used to release copper foil;Lithium foil processing mechanism includes lithium foil unwinding wheel, cutting knife, conveyer belt, manipulator, first release film unwinding wheel and first release film winding wheel, cutting knife is used to cut lithium foil into lithium sheet by lithium foil unwinding wheel release;Conveyer belt is used to carry and transport lithium sheet, first release film unwinding wheel is used to release release film, first release film winding wheel is used to release after and pass through the release film of composite counter roller and wind;Manipulator is used to move lithium sheet on conveyer belt to release film, composite counter roller is used to form composite material belt by composite lithium sheet on release film on copper foil, material belt winding wheel is used to wind composite material belt.The equipment cost of composite material belt preparation device provided by the utility model is lower, and production efficiency is higher.

Description

Technical Field

[0001] This utility model relates to the field of battery production equipment, and more specifically, to a composite strip preparation device. Background Technology

[0002] Currently, some lithium-ion batteries on the market use a composite material of metallic lithium and copper foil current collector as the battery negative electrode.

[0003] The composite equipment used to prepare this type of lithium-ion battery mainly involves composite processing of continuous lithium foil and copper foil. After the composite is completed, the negative electrode strip is cut according to the battery specifications. This process has problems such as high equipment cost and low production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a composite strip preparation device that can reduce equipment costs and improve production efficiency.

[0005] The embodiments of this utility model provide a technical solution:

[0006] A composite strip preparation apparatus includes a copper foil unwinding wheel, a strip winding wheel, a composite roller, and a lithium foil processing mechanism, wherein the copper foil unwinding wheel is used to unwind copper foil.

[0007] The lithium foil processing mechanism includes a lithium foil unwinding wheel, a cutter, a conveyor belt, a robotic arm, a first release film unwinding wheel, and a first release film take-up wheel. The cutter is used to cut the lithium foil unwinding from the lithium foil unwinding wheel into lithium sheets.

[0008] The conveyor belt is used to carry and transport the lithium sheet, the first release film unwinding roller is used to unwind the release film, and the first release film winding roller is used to wind up the release film that has been unwound and passed through the composite rollers.

[0009] The robotic arm is used to transfer the lithium sheet on the conveyor belt to the release film, the composite roller is used to composite the lithium sheet on the release film onto the copper foil to form a composite strip, and the strip take-up wheel is used to take up the composite strip.

[0010] In an optional embodiment, the lithium foil processing mechanism further includes a feeding module, which is arranged sequentially with the cutter between the lithium foil unwinding wheel and the conveyor belt. The feeding module is used to convey the unwound lithium foil to the conveyor belt.

[0011] In an optional embodiment, the lithium foil processing mechanism further includes a first guide roller disposed between the feeding module and the lithium foil unwinding roller.

[0012] In an optional embodiment, the lithium foil processing mechanism further includes a first tension roller disposed between the feeding module and the cutter.

[0013] In an optional embodiment, the surface of the conveyor belt has a first adsorption hole for adsorbing or releasing the lithium sheet.

[0014] In an optional embodiment, the robotic arm has a second adsorption hole for adsorbing or releasing the lithium sheet.

[0015] In an optional embodiment, the lithium foil processing mechanism further includes a lubrication module for spraying lubricant onto the cutter.

[0016] In an optional embodiment, the composite strip preparation device further includes a second tension roller, which is disposed between the copper foil unwinding roller and the composite roller pair.

[0017] In an optional embodiment, the composite strip preparation device further includes a second guide roller, which is disposed between the composite rollers and the strip take-up roller.

[0018] In an optional embodiment, there are two lithium foil processing mechanisms, which are arranged opposite to each other on both sides of the composite roller, and the two lithium foil processing mechanisms are respectively used to provide lithium sheets to opposite sides of the copper foil.

[0019] Compared to existing technologies, the composite strip preparation device provided by this utility model, in practical applications, involves a copper foil unwinding device unwinding copper foil, which then passes through composite rollers. The first release film unwinding wheel and the first release film winding wheel of the lithium foil processing mechanism perform unwinding and winding of the release film, which remains in a closed state after passing through the composite rollers. The lithium foil unwinding wheel unwinds lithium foil, and a cutter cuts the unwinding lithium foil into lithium sheets according to battery specifications. A conveyor belt transports the cut lithium sheets, and a robotic arm transfers the lithium sheets from the conveyor belt to the side of the release film closest to the copper foil. Under the action of the composite rollers, the lithium sheets on the release film are rolled and laminated onto the copper foil to obtain a composite strip. The strip winding wheel then winds up the composite strip. As can be seen, this composite strip preparation device cuts the lithium foil before laminating it, enabling intermittent lamination of the lithium foil according to demand, avoiding the high equipment cost and low production efficiency problems associated with traditional continuous lamination devices. Therefore, the beneficial effects of the composite strip preparation device provided by this utility model include lower equipment cost and higher production efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and therefore should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without any creative effort.

[0021] Figure 1 A schematic diagram of the composite strip preparation device provided in an embodiment of this utility model.

[0022] Icons: 100-Composite strip preparation device; 110-Copper foil unwinding roller; 120-Strip winding roller; 130-Composite rollers; 140-Lithium foil processing mechanism; 141-Lithium foil unwinding roller; 142-Cutter; 143-Conveyor belt; 144-Robot arm; 145-First release film unwinding roller; 146-First release film winding roller; 147-Feeding module; 148-First guide roller; 149-First tension roller; 1491-Second release film winding roller; 150-Second tension roller; 160-Second guide roller. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0030] Example

[0031] Please see Figure 1 , Figure 1 The diagram shown is a structural schematic of the composite strip preparation device 100 provided in this embodiment.

[0032] The composite strip preparation apparatus 100 provided in this embodiment includes a copper foil unwinding roller 110, a strip winding roller 120, a composite roller 130, and a lithium foil processing mechanism 140. The copper foil unwinding roller 110 is used to unwind copper foil. The lithium foil processing mechanism 140 can intermittently supply lithium sheets to the composite roller 130. The composite roller 130 can roll and composite the lithium sheets intermittently supplied by the lithium foil processing mechanism 140 onto the unwound copper foil to obtain a composite strip. The strip winding roller 120 can wind up the composite strip.

[0033] Specifically, the lithium foil processing mechanism 140 includes a lithium foil unwinding roller 141, a cutter 142, a conveyor belt 143, a robot arm 144, a first release film unwinding roller 145, and a first release film winding roller 146. The cutter 142 is used to cut the lithium foil unwound by the lithium foil unwinding roller 141 into lithium sheets. The conveyor belt 143 is used to carry and transport the lithium sheets. The first release film unwinding roller 145 is used to unwind the release film, and the first release film winding roller 146 is used to wind up the release film after it has been unwound and passed through the composite roller 130. The robot arm 144 is used to transfer the lithium sheets on the conveyor belt 143 onto the release film, and the composite roller 130 is used to laminate the lithium sheets on the release film onto the copper foil to form a composite strip.

[0034] Understandably, the lithium foil unwinding wheel 141 is used to unwind continuous lithium foil, and the cutter 142 mechanism cuts the unwound lithium foil into lithium sheets of the required size according to the battery specifications.

[0035] The conveyor belt 143 continuously transports the cut lithium sheets. The robot arm 144, as needed, transfers the lithium sheets on the conveyor belt 143 to the release film between the first release film unwinding roller 145 and the first release film winding roller 146, and places them on the side of the region of the release film corresponding to the input end of the composite roller 130 close to the copper foil.

[0036] During the operation of the composite roller 130, the copper foil and release film pass together between the two rollers of the composite roller 130, and the lithium sheet on the release film is pressed and laminated onto the copper foil. In this process, the release film serves to support the lithium sheet, preventing displacement or deflection during lamination and preventing adhesion between the lithium sheet and the composite roller 130, thus ensuring the lamination effect. In this embodiment, one of the two rollers constituting the composite roller 130 is a steel roller, and the other is a resin roller.

[0037] In order to achieve precise control of the lithium foil size, in this embodiment, the lithium foil processing mechanism 140 further includes a feeding module 147. The feeding module 147 and the cutter 142 are arranged sequentially between the lithium foil unwinding roller 141 and the conveyor belt 143. The feeding module 147 is used to transport the unwound lithium foil to the conveyor belt 143.

[0038] In practical applications, the feeding module 147 can feed lithium foil of a specific length to the conveyor belt 143. The cutter 142 cuts the lithium foil between the conveyor belt 143 and the feeding module 147 to obtain lithium sheets that meet the size requirements. The lithium sheets are carried by the conveyor belt 143 and conveyed in a set direction. The feeding module 147 can be a mechanism with clamping and displacement functions. It can clamp the unwound end of the lithium foil and move close to the conveyor belt 143 so that the unwound end of the lithium foil reaches the conveyor belt 143.

[0039] In this embodiment, the conveyor belt 143 has vacuum adsorption capability and its surface has a first adsorption hole for adsorbing or releasing lithium sheets. It can be understood that after the feeding module 147 conveys one end of the unwound lithium foil to the surface of the conveyor belt 143, the conveyor belt 143 adsorbs and fixes the lithium foil through the first adsorption hole. Then, the cutter 142 cuts the lithium foil to obtain lithium sheets, which move in a set direction under the drive of the conveyor belt 143.

[0040] Similarly, in this embodiment, the robotic arm 144 has vacuum adsorption capability and a second adsorption hole. When the robotic arm 144 needs to transfer the lithium sheet from the conveyor belt 143 to the release film, the first adsorption hole on the conveyor belt 143 releases the lithium sheet, and the robotic arm 144 adsorbs and fixes the lithium sheet through the second adsorption hole. After the adsorption and fixation of the lithium sheet is completed, the robotic arm 144 transports the lithium sheet to the centrifugal membrane, and then releases the lithium sheet, so that the lithium sheet is supported by the side of the release film closer to the copper foil.

[0041] In this embodiment, the lithium sheet is transported and carried by the conveyor belt 143 with vacuum adsorption capability and the robot arm 144, which can ensure that the lithium sheet is stable in the transfer process, thereby completing the composite in the state required by the process and obtaining a better composite effect.

[0042] To ensure that the unwound lithium foil is conveyed to the feeding module 147 and cut by the cutter 142 in a stable state, in this embodiment, the lithium foil processing mechanism 140 further includes a first guide roller 148 and a first tension roller 149. The first guide roller 148 is disposed between the feeding module 147 and the lithium foil unwinding wheel 141, and plays a role in supporting the lithium foil. The first tension roller 149 is disposed between the feeding module 147 and the cutter 142, and plays a role in tensioning the lithium foil to ensure the cutting effect of the cutter 142.

[0043] Because lithium foil has extremely high flexibility and adhesion, especially when processing ultra-thin lithium foil with a thickness of less than 100 micrometers, it is very easy to adhere to the mold or cutter 142, resulting in uneven cuts, defective products, and contamination or even sintering of the surface of the mold or cutter 142, affecting continuous production.

[0044] To address this issue, in this embodiment, the lithium foil processing mechanism 140 further includes a lubrication module. The lubrication module is used to spray lubricant onto the cutter 142, which can prevent the lithium foil from adhering to the surface of the cutter 142, thereby achieving better cutting results, ensuring product quality consistency, and enabling the cutting of lithium foil with a thickness as low as 20 micrometers.

[0045] It should be noted that the lubrication module can be arranged independently of the cutter 142, or it can be a part of the structure integrated into the cutter 142.

[0046] The composite strip preparation device 100 provided in this embodiment also includes a second tension roller 150 and a second guide roller 160. The second tension roller 150 is disposed between the copper foil unwinding roller 110 and the composite roller 130, and the second guide roller 160 is disposed between the composite roller 130 and the strip winding roller 120.

[0047] The second tension roller 150 can adjust the tension of the unwound copper foil, ensuring that the copper foil passes through the composite roller 130 in a stable state, thereby achieving a perfect composite effect. The second guide roller 160 supports the composite strip between the composite roller 130 and the strip take-up roller 120, ensuring the winding effect of the composite strip.

[0048] It should be noted that in this embodiment, there are two lithium foil processing mechanisms 140. The two lithium foil processing mechanisms 140 are arranged opposite to each other on both sides of the composite roller 130. The two lithium foil processing mechanisms 140 are respectively used to provide lithium sheets to the opposite sides of the copper foil.

[0049] In addition, in this embodiment, the lithium foil processing mechanism 140 also includes a second release film winding wheel 1491, which is used to wind up the release film that has been peeled off from the lithium foil at the lithium foil unwinding wheel 141.

[0050] In practical applications, depending on actual production needs, only one lithium foil processing unit 140 can operate while the other remains stationary, to intermittently laminate lithium sheets onto one side of the copper foil surface. Alternatively, both lithium foil processing units 140 can operate to intermittently laminate lithium sheets onto both sides of the copper foil surface.

[0051] In summary, the composite strip preparation device 100 provided in this embodiment cuts lithium foil before laminating it, realizing intermittent lamination of lithium foil according to demand. It has the characteristics of lower equipment cost, higher production efficiency and more flexible application scenarios.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A composite strip preparation device, characterized in that, It includes a copper foil unwinding roller (110), a strip winding roller (120), a composite roller (130), and a lithium foil processing mechanism (140), wherein the copper foil unwinding roller (110) is used to unwind copper foil; The lithium foil processing mechanism (140) includes a lithium foil unwinding wheel (141), a cutter (142), a conveyor belt (143), a robot (144), a first release film unwinding wheel (145), and a first release film winding wheel (146). The cutter (142) is used to cut the lithium foil unwinding from the lithium foil unwinding wheel (141) into lithium sheets. The conveyor belt (143) is used to carry and transport the lithium sheet, the first release film unwinding roller (145) is used to unwind the release film, and the first release film winding roller (146) is used to wind up the release film after it has been unwound and passed through the composite roller (130). The robotic arm (144) is used to transfer the lithium sheet on the conveyor belt (143) to the release film, the composite roller (130) is used to composite the lithium sheet on the release film onto the copper foil to form a composite strip, and the strip take-up roller (120) is used to take up the composite strip.

2. The composite strip preparation apparatus according to claim 1, characterized in that, The lithium foil processing mechanism (140) further includes a feeding module (147), which and the cutter (142) are arranged sequentially between the lithium foil unwinding wheel (141) and the conveyor belt (143). The feeding module (147) is used to transport the unwound lithium foil to the conveyor belt (143).

3. The composite strip preparation apparatus according to claim 2, characterized in that, The lithium foil processing mechanism (140) further includes a first feed roller (148), which is disposed between the feeding module (147) and the lithium foil unwinding roller (141).

4. The composite strip preparation apparatus according to claim 2, characterized in that, The lithium foil processing mechanism (140) further includes a first tension roller (149), which is disposed between the feeding module (147) and the cutter (142).

5. The composite strip preparation apparatus according to claim 1, characterized in that, The surface of the conveyor belt (143) has a first adsorption hole, which is used to adsorb or release the lithium sheet.

6. The composite strip preparation apparatus according to claim 1, characterized in that, The robotic arm (144) has a second adsorption hole for adsorbing or releasing the lithium sheet.

7. The composite strip preparation apparatus according to claim 1, characterized in that, The lithium foil processing mechanism (140) also includes a lubrication module for spraying lubricant onto the cutter (142).

8. The composite strip preparation apparatus according to claim 1, characterized in that, The composite strip preparation device (100) further includes a second tension roller (150), which is disposed between the copper foil unwinding roller (110) and the composite roller (130).

9. The composite strip preparation apparatus according to claim 1, characterized in that, The composite strip preparation device (100) further includes a second guide roller (160), which is disposed between the composite roller (130) and the strip take-up roller (120).

10. The composite strip preparation apparatus according to claim 1, characterized in that, The number of lithium foil processing mechanisms (140) is two, and the two lithium foil processing mechanisms (140) are arranged opposite to each other on both sides of the composite roller (130). The two lithium foil processing mechanisms (140) are respectively used to provide lithium sheets to the opposite sides of the copper foil.

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