Improved lithium ion battery pole piece die-cutting machine

Abstract

The utility model discloses an improved lithium ion battery pole piece die-cutting machine, and belongs to the field of lithium ion battery pole piece die-cutting equipment. The die-cutting machine comprises the rolling device, the die-cutting device and the winding device, the film covering mechanism is arranged in the rolling device, and the electrode slice stripping mechanism is arranged in the winding device, so that a layer of protective film belt is attached to an electrode coating in front of the die-cutting device, the electrode coating is prevented from being touched in the die-cutting process, and the die-cutting efficiency is improved through the electrode slice stripping mechanism after die-cutting. According to the die cutting device, the cut electrode plate can be automatically stripped from the film belt, the phenomenon of powder falling of the electrode plate in the die cutting process is avoided, the battery manufacturing efficiency and safety are improved, and meanwhile pollution to the environment is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of equipment for die-cutting lithium-ion battery electrodes, and particularly relates to an improved die-cutting machine for lithium-ion battery electrodes. Background Technology

[0002] In existing technologies, when die-cutting electrodes using a die-cutting machine, the large cutting force causes the blade to squeeze the edge of the electrode, resulting in dust falling off the edge. This not only affects the performance of the battery cell, but also pollutes the environment due to the dust. Utility Model Content

[0003] To address the problems existing in the prior art, the main objective of this utility model is to provide an improved lithium-ion battery electrode die-cutting machine, which aims to solve the problem of powder shedding from the electrode edges in the prior art and improve the efficiency and safety of battery manufacturing.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An improved lithium-ion battery electrode die-cutting machine includes a rolling device, a die-cutting device, and a winding device. The rolling device is used to attach an electrode coating onto a conductive base tape. The rolling device is provided with a coating mechanism, which includes an unwinding roller and a coating roller assembly. The coating roller assembly is located at the end of the coating mechanism and receives the conductive base tape and the film tape with the electrode coating attached, and attaches the film tape to one side of the electrode coating.

[0006] The die-cutting device is located in front of the coating mechanism. The die-cutting device includes a punching mechanism, which includes an upper die and a lower die. The lower die is fixedly mounted on the die-cutting device, and the upper die is reciprocated relative to the lower die on the die-cutting device. The upper die and / or the lower die are provided with an electrode sheet shaped die core.

[0007] The winding device is located behind the die-cutting device. The winding device includes a waste material winding mechanism and an electrode sheet peeling mechanism. The waste material winding mechanism is used to wind up the conductive base tape waste after punching. The electrode sheet peeling mechanism is located behind the waste material winding mechanism and is used to wind the film tape and separate the electrode sheet from the wound film tape.

[0008] Preferably, the electrode stripping mechanism is a label peeling machine.

[0009] Preferably, the electrode stripping mechanism includes a guide rod, a top plate, and a winding wheel. The guide rod is used to guide the film strip covered with electrode sheets, the top plate is used to push the inner side of the film strip and separate the electrode sheets, and the winding wheel is used to pull the film strip.

[0010] Preferably, the electrode stripping mechanism further includes a tension control device, which adjusts the position of the guide rod.

[0011] Preferably, the winding device further includes a stacking platform disposed behind the top plate for collecting electrode sheets.

[0012] Preferably, the die-cutting device feeds the material with the conductive base tape facing the upper die.

[0013] Preferably, the end of the rolling device further includes a flipping roller assembly.

[0014] Preferably, the die-cutting device further includes a controller that can adjust the stamping pressure of the upper and lower dies.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This utility model of a die-cutting machine includes a roller pressing device, a die-cutting device, and a winding device. By setting a film coating mechanism in the roller pressing device and an electrode sheet peeling mechanism in the winding device, a protective film is attached to the electrode coating in front of the die-cutting device to prevent the die-cutting from touching the electrode coating. After die-cutting, the electrode sheet peeling mechanism can automatically peel the cut electrode sheet from the film, thereby avoiding the phenomenon of electrode sheet powder falling off during the die-cutting process, improving the efficiency and safety of battery manufacturing, and reducing environmental pollution.

[0017] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of the die-cutting machine according to an embodiment of the present invention.

[0019] Figure 2 A schematic diagram of the structure of the roller pressing device according to an embodiment of the present invention.

[0020] Figure 3 A schematic diagram of the processing function of the roller pressing device according to an embodiment of the present invention.

[0021] Figure 4 A schematic diagram of the die-cutting apparatus according to an embodiment of the present invention.

[0022] Figure 5 A schematic diagram of the processing function of the die-cutting device according to an embodiment of the present invention.

[0023] Figure 6 A schematic diagram of the structure of the winding device according to an embodiment of the present invention.

[0024] Figure 7A schematic diagram of the processing function of the winding device according to an embodiment of the present invention.

[0025] Reference numerals: 10, Roller pressing device; 20, Die-cutting device; 21, Upper die; 22, Lower die; 30, Rewinding device; 31, Residual material rewinding mechanism; 32, Stacking platform; 40, Coating mechanism; 41, Unwinding roller; 42, Coating roller assembly; 50, Electrode sheet peeling mechanism; 51, Guide light rod; 52, Top plate; 53, Rewinding roller; 91, Electrode coating; 92, Conductive base tape; 93, Film tape; 94, Electrode sheet; 95, Conductive base tape residue. Detailed Implementation

[0026] To better illustrate the purpose, technical solution, and advantages of this utility model, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0027] like Figures 1 to 7 As shown, an improved lithium-ion battery electrode die-cutting machine according to an embodiment of the present invention includes a roller pressing device 10, a die-cutting device 20, and a winding device 30. The roller pressing device 10 is used to attach an electrode coating 91 to a conductive base tape 92. The roller pressing device 10 is provided with a coating mechanism 40, which includes an unwinding roller 41 and a coating roller assembly 42. The coating roller assembly 42 is located at the end of the coating mechanism 40 and receives the conductive base tape 92 with the electrode coating 91 attached and a film tape 93, attaching the film tape 93 to one side of the electrode coating 91. The die-cutting device 20 is located in front of the coating mechanism 40 and includes a punching mechanism. The punching mechanism includes an upper die 21 and a lower die 22. The lower die 22 is fixedly disposed on the die-cutting device 20, and the upper die 21 is reciprocatingly disposed on the die-cutting device 20 relative to the lower die 22. The upper die 21 is provided with an electrode sheet shaped die core. The winding device 30 is located behind the die-cutting device 20. The winding device 30 includes a waste material 95 winding mechanism 31 and an electrode sheet peeling mechanism 50. The waste material 95 winding mechanism 31 is used to wind the punched conductive base tape 92 waste material 95. The electrode sheet peeling mechanism 50 is located behind the waste material 95 winding mechanism 31 and is used to wind the film tape 93 and separate the electrode sheet 94 from the wound film tape 93.

[0028] refer to Figures 2 to 7 In use, the film strip 93 can be made using a PET mold. PET molds have good adhesion and toughness, allowing them to adhere not only to the electrode coating 91 but also to prevent them from being cut by a die-cutting machine. The film strip 93 is placed on the unwinding roller 41, and the coating roller assembly 42 receives the conductive base strip 92 with the electrode coating 91 attached and the film strip 93, so that the film strip 93 covers the electrode coating 91. (See figure) Figure 3 Below is the film strip 93, in the middle is the electrode coating 91, and above is the conductive base strip 92. At the die-cutting device 20, the upper die 21 has a die shaped like an electrode sheet, which punches towards the back side of the conductive base strip 92, causing the conductive base strip 92 and the electrode coating 91 to be punched into electrode sheet shapes, while retaining the film strip 93. During die-cutting, due to the coating mechanism 40, the electrode coating 91 is attached to the protective film strip 93, preventing coating dust from falling off. At the winding device 30, on one hand, the waste material 95 winding mechanism 31 winds up the waste material 95 of the conductive base strip 92 with the electrode coating 91 attached; on the other hand, the electrode sheet peeling mechanism 50 completely peels off the punched electrode sheet 94, thereby protecting the coating of the electrode sheet 94.

[0029] In this specific embodiment, the electrode sheet peeling mechanism 50 is a label peeling machine. The punched electrode sheet 94 is similar to a label and can be peeled using a label peeling machine.

[0030] Specifically, in this embodiment, the electrode stripping mechanism 50 includes a guide rod 51, a top plate 52, and a take-up roller 53. The guide rod 51 guides the film strip 93 covered with electrode sheets 94. The top plate 52 pushes the inner side of the film strip 93 and separates the electrode sheets 94. The take-up roller 53 pulls the film strip 93. The electrode stripping mechanism 50, with its top plate 52 and take-up roller 53, allows the film strip 93 to retract backward while the electrode sheets 94 continue to move forward, thus achieving stripping.

[0031] Specifically, in this embodiment, the electrode stripping mechanism 50 further includes a tension control device. The tension control device adjusts the position of the guide rod 51 to adjust the tension, which is suitable for electrode sheets 94 of different shapes and sets different tensions.

[0032] Specifically, in this embodiment, the winding device 30 further includes a stacking platform 32, which is disposed behind the top plate 52 for collecting the electrode sheet 94, so that the stripped electrode sheet 94 can be collected.

[0033] Specifically, in this embodiment, the die-cutting device 20 feeds the conductive base strip 92 towards the upper die 21. The die-cutting device 20 also includes a controller that can adjust the stamping pressure of the upper die 21 and the lower die 22. The die-cutting device 20 cuts from the conductive base strip 92 side, and can control the force to cut only the conductive base strip 92 and the electrode coating 91, without cutting the PET film strip 93.

[0034] In this embodiment, the end of the rolling device 10 also includes a flipping roller assembly. The film coating mechanism 40 attaches the film strip 93 to the electrode coating 91. The flipping roller assembly can flip the material and feed it into the die-cutting device 20 with the electrode base strip facing upward (i.e. towards the upper mold 21).

[0035] The above embodiments mainly describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An improved lithium-ion battery electrode die-cutting machine, comprising a rolling device (10), a die-cutting device (20), and a winding device (30), characterized in that: The roller pressing device (10) is used to attach the electrode coating to the conductive base tape. The roller pressing device (10) is provided with a coating mechanism (40). The coating mechanism (40) includes an unwinding roller (41) and a coating roller assembly (42). The coating roller assembly (42) is located at the end of the coating mechanism (40) and receives the conductive base tape and film tape with the electrode coating attached, and attaches the film tape to one side of the electrode coating. The die-cutting device (20) is located in front of the coating mechanism (40). The die-cutting device (20) includes a punching mechanism, which includes an upper die (21) and a lower die (22). The lower die (22) is fixedly disposed on the die-cutting device (20), and the upper die (21) is disposed on the die-cutting device (20) in a reciprocating motion relative to the lower die (22). The upper die (21) and / or the lower die (22) are provided with an electrode sheet shaped mold core. The winding device (30) is located behind the die-cutting device (20). The winding device (30) includes a waste material winding mechanism (31) and an electrode sheet peeling mechanism (50). The waste material winding mechanism (31) is used to wind the conductive base tape waste after punching. The electrode sheet peeling mechanism (50) is located behind the waste material winding mechanism (31) and is used to wind the film tape and separate the electrode sheet from the wound film tape.

2. The improved lithium-ion battery electrode die-cutting machine according to claim 1, characterized in that, The electrode stripping mechanism (50) is a label stripper.

3. An improved lithium-ion battery electrode die-cutting machine according to claim 2, characterized in that, The electrode stripping mechanism (50) includes a guide rod (51), a top plate (52), and a winding wheel (53). The guide rod (51) is used to guide the film strip covered with electrode sheets. The top plate (52) is used to push the inner side of the film strip and separate the electrode sheets. The winding wheel (53) is used to pull the film strip.

4. An improved lithium-ion battery electrode die-cutting machine according to claim 3, characterized in that, The electrode stripping mechanism (50) also includes a tension control device that adjusts the position of the guide rod (51).

5. An improved lithium-ion battery electrode die-cutting machine according to claim 3, characterized in that, The winding device (30) also includes a stacking platform (32) located behind the top plate (52) for collecting electrode sheets.

6. An improved lithium-ion battery electrode die-cutting machine according to claim 1, characterized in that, The die-cutting device (20) feeds the material with the conductive baseband facing the upper die (21).

7. An improved lithium-ion battery electrode die-cutting machine according to claim 5, characterized in that, The end of the roller pressing device (10) also includes a turning roller assembly.

8. An improved lithium-ion battery electrode die-cutting machine according to claim 1, characterized in that, The die-cutting device (20) also includes a controller that can adjust the stamping pressure of the upper die (21) and the lower die (22).

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