Lithium-ion battery positive and negative electrode sheet double-sided printer

Abstract

We provide double-sided printers for positive and negative electrode sheets for lithium-ion batteries. [Solution] A lithium ion battery positive electrode sheet / negative electrode sheet double-sided printer 1 in which a metal foil reel 2, a sheet bonding roller set 3, a lifting nozzle assembly 4, a sheet pulling roller set 5 and a cutter assembly 6 are arranged in this order, the metal foil reel is arranged to take up a pre-printed board 7 as a metal foil, the sheet bonding roller set is arranged to roll and guide the pre-printed board, the lifting nozzle assembly includes two lifting nozzles 40 arranged opposite each other, the two lifting nozzles are respectively arranged on both sides of the pre-printed board, the lifting nozzles have a lifting mechanism 41 and a linear jet head 42, the lifting mechanism is connected to the linear jet head and arranged to raise and lower the linear jet head, and the nozzle of the linear jet head is arranged facing the pre-printed board.

Description

[Technical field]

[0001] This invention relates to the technical field of lithium ion battery production, in particular to a double-sided printer for positive and negative electrode sheets of lithium ion batteries. [Background technology]

[0002] Existing lithium-ion battery production technology is already very mature and widespread, and even has excess production capacity. According to market application needs, the types of lithium-ion batteries have expanded from the early metal shell cylindrical batteries to the current square shell batteries and soft-pack batteries. Soft-pack batteries are further divided into normal batteries with tabs on one side and so-called "blade" batteries with tabs on both sides. The internal structure of the battery has also evolved from the early winding method to the current stacking method. Stacked batteries are more suitable for the application scenario of instantaneous high-current charging and discharging. However, the existing lithium-ion stacked batteries have problems in the production and processing of lithium-ion battery positive and negative electrode sheets, such as too complicated procedures, poor control accuracy of the coating of positive and negative electrode materials, large equipment investment, and high production costs.

[0003] Given this situation, there is a great need to further streamline the additive manufacturing process. Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention aims to provide a double-sided printer for positive and negative electrode sheets of lithium ion batteries to solve the problems existing in the prior art, reduce equipment investment, reduce production costs, optimize production procedures, and improve product performance. [Means for solving the problem]

[0005] To achieve the above objectives, the present invention provides the following solutions:

[0006] The present invention provides a lithium ion battery positive electrode sheet / negative electrode sheet double-sided printer, which includes a metal foil reel, a sheet bonding roller set, a lifting nozzle assembly, a sheet tension roller set, and a cutter assembly, which are arranged in this order. The metal foil reel is arranged to wind up a pre-printed substrate as a metal foil, the sheet bonding roller set is arranged to roll and guide the pre-printed substrate, the lifting nozzle assembly includes two lifting nozzles arranged opposite each other, the two lifting nozzles are arranged on both sides of the pre-printed substrate, the lifting nozzles include a lifting mechanism and a linear spray head, the lifting mechanism is connected to the linear spray head and arranged to lift and lower the linear spray head, the nozzle of the linear spray head is a linear nozzle arranged facing the pre-printed substrate and arranged to spray and print a positive electrode slurry or a negative electrode slurry on the surface of the pre-printed substrate in a linear shape, the sheet tension roller set is arranged to roll, heat, and guide the printed substrate, and the cutter assembly is arranged to cut the printed substrate.

[0007] In one embodiment, the sheet bonding roller set includes two sheet bonding rollers arranged in parallel, and the pre-printed board passes between the two sheet bonding rollers.

[0008] In one embodiment, the sheet tensioning roller set includes two sheet tensioning rollers arranged in parallel, and the sheet tensioning rollers are arranged in parallel with the sheet bonding roller, and the printed substrate passes between the two sheet tensioning rollers.

[0009] In one embodiment, the linear jetting head is positioned perpendicular to the pre-printed substrate.

[0010] In one embodiment, the lift mechanism is a motorized lift rod.

[0011] In one embodiment, the cutter assembly includes two cutters positioned opposite one another.

[0012] In one embodiment, the surface layer of the sheet pulling roller has an electric heating film embedded therein. Effect of the Invention

[0013] Compared with the prior art, the present invention achieves the following technical advantages: The lithium-ion battery positive and negative electrode sheet double-sided printer provided by this invention directly replaces the existing two huge positive and negative electrode material coating machines, large rolling machines, tens of meters of channel dryers, large slitting machines and other equipment, reducing equipment investment and production costs. It uses a linear spray head with 3D printing technology to spray and print the positive or negative electrode slurry, making full use of the advantages of 3D printing technology, improving the control accuracy of positive and negative electrode material coating, optimizing production procedures, and contributing to improving product performance. [Brief description of the drawings]

[0014] In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the accompanying drawings that need to be used in the embodiments. Obviously, the drawings in the following description are only several embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative efforts.

[0015] [Figure 1] Schematic diagram of the positive and negative electrode sheets of a lithium-ion battery. [Diagram 2] 1 is a schematic diagram showing the structure of a lithium ion battery positive electrode sheet / negative electrode sheet double-sided printer according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The technical solutions in the embodiments of the present invention will be described below clearly and completely with reference to the accompanying drawings in the embodiments of the present invention. It is clear that the described embodiments are only some embodiments of the present invention, and are not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present invention.

[0017] The purpose of this invention is to provide a lithium ion battery positive electrode sheet and negative electrode sheet double-sided printer to solve the problems existing in the prior art, reduce equipment investment, reduce production costs, optimize production procedures, and improve product performance.

[0018] In order to make the above objectives, features and advantages of the present invention clearer and easier to understand, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0019] As shown in FIG. 2, this embodiment provides a lithium ion battery positive electrode sheet / negative electrode sheet double-sided printer 1 in which a metal foil reel 2, a sheet bonding roller set 3, a lifting nozzle assembly 4, a sheet pulling roller set 5, and a cutter assembly 6 are sequentially arranged. The metal foil reel 2 is arranged to wind up a metal foil pre-printed board 7, the sheet bonding roller set 3 is arranged to roll and guide the pre-printed board 7, the lifting nozzle assembly 4 includes two lifting nozzles 40 arranged opposite each other, the two lifting nozzles 40 are respectively arranged on both sides of the pre-printed board 7, the lifting nozzle 40 includes a lifting mechanism 41 and a linear jet head 42, the lifting mechanism 41 is connected to the linear jet head 42 and arranged to lift and lower the linear jet head 42, the nozzle of the linear jet head 42 is arranged facing the pre-printed board 7, and is a linear nozzle arranged to spray and print the positive electrode slurry or the negative electrode slurry on the surface of the pre-printed board 7 in a line. The sheet pulling roller set 5 has an electric heating film embedded in its surface layer and is arranged to roll, heat and guide the printed substrate, and the cutter assembly 6 is arranged to cut the printed substrate.

[0020] In this embodiment, the sheet bonding roller set 3 includes two sheet bonding rollers 30 arranged in parallel, and the pre-printed substrate 7 passes between the two sheet bonding rollers 30. The sheet tension roller set 5 includes two sheet tension rollers 50 arranged in parallel, and the sheet tension rollers 50 are arranged in parallel with the sheet bonding rollers 30, and the printed substrate passes between the two sheet tension rollers 50.

[0021] In this embodiment, the linear jetting head 42 is disposed perpendicular to the pre-printed board 7, improving print quality.

[0022] In this embodiment, the lifting mechanism 41 is an electric lifting rod, which has a simple structure and is easy to control.

[0023] In this embodiment, the cutter assembly 6 includes two cutters 60 positioned opposite each other and configured to cut the printed substrate into lithium ion battery positive or negative electrode sheets 8 (as shown in FIG. 1).

[0024] In use, the metal foil reel 2 firmly holds a copper foil roll or aluminum foil roll with a width of 125 mm and a thickness of 20 μm, the sheet bonding roller 30 uses the adhesion effect of its surface layer to finally clean the substrate, the sheet pulling roller 50 simultaneously completes uniform rolling and heating / dehumidification, the linear spray head 42 directly sprays the pre-prepared positive electrode slurry or negative electrode slurry on both sides of the metal foil substrate in a line shape, forming a spray coating layer 9 of positive electrode or negative electrode material on the surface of the metal foil substrate, and the two electric lifting rods drive the two linear spray heads 42 to move up and down continuously and uniformly according to a preset speed, and the cutter 60 cuts the sprayed finished product in a shearing manner to form a lithium ion battery positive electrode sheet or negative electrode sheet 8 (shown in FIG. 1).

[0025] The lithium-ion battery positive and negative electrode sheet double-sided printer provided by this invention directly replaces the existing two huge positive and negative electrode material coating machines, large rolling machines, channel dryers with tens of meters, large slitting machines and other equipment, reducing equipment investment and production costs. It uses the linear spray head 42 with 3D printing technology to spray and print the positive electrode slurry or negative electrode slurry, making full use of the advantages of 3D printing technology, improving the control accuracy of the positive and negative electrode material coating, optimizing the production procedures, and contributing to improving product performance.

[0026] In the present invention, specific examples are used to explain the principle and embodiment of the present invention, and the above description of the examples is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, changes will occur in specific embodiments and application scope. In summary, the contents of this specification should not be understood as limiting the present invention. [Explanation of symbols]

[0027] 1-Lithium ion battery positive and negative electrode sheet double-sided printer 2-Metal Foil Reels 3-Sheet Bonding Roller Set 30-Sheet Bonding Roller 4-Lifting nozzle assembly 40-Lifting nozzle 41-Lifting mechanism 42-Linear injection head 5-Sheet Pulling Roller Set 50-Sheet tension roller 6-Cutter Assembly 60-Cutter 7-Pre-printed circuit board 8- Lithium ion battery positive or negative electrode sheet 9-Spray coating layer of positive or negative electrode material

Claims

1. A lithium ion battery positive electrode sheet / negative electrode sheet double-sided printer, comprising a metal foil reel, a sheet bonding roller set, a lifting nozzle assembly, a sheet tension roller set, and a cutter assembly, which are arranged in this order, the metal foil reel being arranged to wind up a pre-printed board as a metal foil, the sheet bonding roller set being arranged to roll and guide the pre-printed board, the lifting nozzle assembly including two lifting nozzles arranged opposite to each other, the two lifting nozzles being arranged on both sides of the pre-printed board, and the lifting nozzles being linearly connected to a lifting mechanism. a nozzle of the linear jet head that is arranged facing the preprinted board and that is arranged to spray and print the positive electrode slurry or the negative electrode slurry in a line onto the surface of the preprinted board; the sheet pulling roller set is arranged to roll, heat, and guide the printed board; and the cutter assembly is arranged to cut the printed board.

2. The lithium ion battery positive electrode sheet / negative electrode sheet double-sided printer according to claim 1, characterized in that the sheet bonding roller set includes two sheet bonding rollers arranged in parallel, and the preprinted board passes between the two sheet bonding rollers.

3. The lithium ion battery positive electrode sheet / negative electrode sheet double-sided printer according to claim 2, characterized in that the sheet pulling roller set includes two sheet pulling rollers arranged in parallel, the sheet pulling rollers are arranged in parallel with the sheet bonding roller, and the printed substrate passes between the two sheet pulling rollers.

4. The positive electrode sheet and negative electrode sheet double-sided printer for lithium ion batteries according to claim 1 , wherein the linear ejection head is disposed perpendicular to the pre-printed board.

5. 2. The lithium ion battery positive electrode sheet / negative electrode sheet double-sided printer according to claim 1, wherein the lifting mechanism is an electric lifting rod.

6. The lithium ion battery positive electrode sheet / negative electrode sheet double-sided printer according to claim 1 , wherein the cutter assembly includes two cutters arranged opposite each other.

7. 2. The lithium ion battery positive electrode sheet / negative electrode sheet double-sided printer according to claim 1, wherein an electric heating film is embedded in the surface layer of the sheet pulling roller.

Images