Diaphragm static electricity removing mechanism in lithium ion battery winding process

Abstract

The utility model relates to a diaphragm destaticizing mechanism in a lithium ion battery winding process, which comprises a grounding wire and a plurality of spray points, one end of the grounding wire is electrically connected with a high-voltage power supply, and the other end of the grounding wire is grounded; the plurality of spray points are respectively connected with the high-voltage power supply; the plurality of spray points are respectively arranged on the diaphragm roll and fully cover the diaphragm roll in the width direction and vertically point to the diaphragm roll; the diaphragm roll is wound on the diaphragm roller; the static electricity eliminating device has the advantages of being reasonable in structure, convenient to assemble, and capable of neutralizing and rapidly eliminating static electricity.

Description

Technical Field

[0001] This utility model belongs to the field of lithium-ion battery technology, specifically relating to a separator static elimination mechanism for the winding process of lithium-ion batteries. Background Technology

[0002] During the winding process, the positive electrode, negative electrode, and separator are wound together using the winding needle mechanism of a winding machine. Adjacent positive and negative electrode sheets are isolated by the separator to prevent short circuits. The separator must ensure that there is no physical contact or short circuit between the positive and negative electrodes, and that the negative electrode sheet is completely covered in both the horizontal and vertical directions. The capacity, cycle life, and operating voltage of a lithium-ion battery are all affected by the separator. However, during winding, the separator generates static electricity through friction as it passes over the roller surface. This static electricity can attract dust, which is then drawn into the cell and, through insulation testing, can cause the separator to break down, resulting in short circuits between the positive and negative electrodes or affecting voltage drop. Static electricity can also cause the separator to adhere to the winding needle surface, making core pulling difficult. Furthermore, static electricity can cause wrinkles inside the separator, affecting electrical performance. Therefore, it is essential to provide a static electricity eliminator for the separator during the lithium-ion battery winding process that is structurally sound, easy to assemble, neutralizes static electricity, and quickly eliminates static electricity. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a lithium-ion battery winding process separator static elimination mechanism that is structurally reasonable, easy to assemble, neutralizes static electricity, and quickly eliminates static electricity.

[0004] The purpose of this utility model is achieved as follows: a separator static elimination mechanism for the winding process of a lithium-ion battery, comprising a grounding wire and multiple discharge needles, wherein one end of the grounding wire is electrically connected to a high-voltage power supply and the other end is grounded; the multiple discharge needles are respectively connected to the high-voltage power supply; the multiple discharge needles are respectively mounted on the separator roll, and are perpendicularly pointing to the separator roll in the width direction; the separator roll is wound on a separator roller.

[0005] The multiple discharge needles are disposed on one side of the diaphragm roll or on both sides of the diaphragm roll respectively.

[0006] Multiple discharge needles located on the same side of the diaphragm roll are arranged at intervals along the conveying direction of the diaphragm roll to form an antistatic strip.

[0007] The discharge needles are all pointed vertically towards the diaphragm roll.

[0008] The distance between the tip of the discharge needle and the surface of the diaphragm roll is set to 20-100mm.

[0009] The antistatic strip, composed of multiple discharge needles, has an antistatic length of 50-300 mm in the width direction.

[0010] The spacing between adjacent discharge needles is 10-20 mm.

[0011] The operating voltage of the high-voltage power supply is 3KV-6KV.

[0012] The beneficial effects of this utility model are as follows: This utility model is a diaphragm static elimination mechanism for the winding process of lithium-ion batteries, used to neutralize the static electricity on the surface of the diaphragm roll, thereby eliminating static electricity. In use, this utility model applies voltage to multiple discharge needles through a high-voltage power supply, causing corona discharge at the tip of the discharge needles. This ionizes and decomposes the air around the discharge needles, generating positive and negative ions. These positive and negative ions neutralize the static electricity on the diaphragm roll, thus eliminating the static electricity on the diaphragm roll. Moreover, the multiple discharge needles are arranged on one side of the diaphragm roll or on both sides of the diaphragm roll, which can accelerate the elimination of static electricity on the diaphragm roll. The static elimination band of this utility model can be adjusted by adjusting the number of discharge needles, the spacing between adjacent discharge needles, and the distance between the discharge needles and the diaphragm roll, thereby accelerating the elimination of static electricity. This utility model has the advantages of reasonable structure, convenient assembly, neutralization of static electricity, and rapid elimination of static electricity. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram illustrating the application of this utility model.

[0015] In the diagram: 1. Grounding wire; 2. High voltage power supply; 3. Discharge needle; 4. Diaphragm roll; 5. Diaphragm roller. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings. Example

[0017] like Figure 1 As shown, a separator static elimination mechanism for the winding process of a lithium-ion battery includes a grounding wire 1 and multiple discharge needles 3. One end of the grounding wire 1 is electrically connected to a high-voltage power supply 2, and the other end is grounded. The multiple discharge needles 3 are respectively connected to the high-voltage power supply 2. The multiple discharge needles 3 are respectively installed on the separator roll 4, and are perpendicular to the separator roll 4 in the width direction. The separator roll 4 is wound on a separator roller 5.

[0018] The multiple discharge needles 3 are all disposed on one side of the diaphragm roll 4 or on both sides of the diaphragm roll 4 respectively.

[0019] Multiple discharge needles 3 located on the same side of the diaphragm roll 4 are arranged at intervals along the conveying direction of the diaphragm roll 4 to form an antistatic strip.

[0020] The discharge needles 3 are all perpendicularly pointed to the diaphragm roll 4.

[0021] In this embodiment, the present invention applies voltage to the discharge needle 3 through a high-voltage power supply 2, causing corona discharge at the tip of the discharge needle 3. This ionizes and decomposes the air around the discharge needle 3, generating positive and negative ions. Since the discharge needles 3 are all perpendicularly pointed to the diaphragm roll 4, the positive and negative ions neutralize the static electricity of the statically charged diaphragm roll 4, thereby eliminating the static electricity on the diaphragm roll 4. Furthermore, the fact that multiple discharge needles 3 are arranged on one side of the diaphragm roll 4 or on both sides of the diaphragm roll 4 can accelerate the elimination of static electricity on the diaphragm roll 4. The static elimination band can be adjusted by changing the number of discharge needles 3, the spacing between adjacent discharge needles 3, and the distance between the discharge needles 3 and the diaphragm roll 4, thereby accelerating the elimination of static electricity. In summary, the present invention has the advantages of simple structure, convenient assembly, and fast static elimination.

[0022] The distance between the tip of the discharge needle 3 and the surface of the diaphragm roll 4 is set to 20-100mm.

[0023] The antistatic strip composed of multiple discharge needles 3 has an antistatic length of 50-300mm in the width direction.

[0024] In this embodiment, the distance between the tip of the discharge needle 3 and the diaphragm roll 4 is 20-100mm to better and faster eliminate static electricity on the diaphragm; the distance between the discharge needle 3 and the diaphragm roll 4 can be adjusted according to actual process requirements; the length of the antistatic strip is set to 50-300mm to better and faster eliminate static electricity on the diaphragm roll 4.

[0025] The spacing between adjacent discharge needles 3 is 10-20 mm.

[0026] In this embodiment, the spacing between adjacent discharge needles 3 is 10-20mm, which is convenient to match the range of corona discharge generated at the front end of the discharge needle 3, so as to eliminate static electricity on the diaphragm better and faster.

[0027] This invention relates to a static eliminator mechanism for the separator during the winding process of a lithium-ion battery. It neutralizes static electricity on the surface of the separator roll 4, achieving the purpose of eliminating static electricity. In use, this invention applies voltage to multiple discharge needles 3 via a high-voltage power supply 2, causing corona discharge at the tip of the needles 3. This ionizes and decomposes the air around the needles 3, generating positive and negative ions. These ions neutralize the static electricity on the separator roll 4, thereby eliminating static electricity. Furthermore, the multiple discharge needles 3 are positioned on one side of the separator roll 4 or on both sides, which accelerates the elimination of static electricity. The static eliminator band of this invention can be adjusted by changing the number of discharge needles 3, the spacing between adjacent discharge needles 3, and the distance between the discharge needles 3 and the separator roll 4, thereby accelerating the elimination of static electricity. This invention has the advantages of reasonable structure, convenient assembly, static neutralization, and rapid static elimination. Example

[0028] like Figures 1-2 As shown, a separator static elimination mechanism for the winding process of a lithium-ion battery includes a grounding wire 1 and multiple discharge needles 3. One end of the grounding wire 1 is electrically connected to a high-voltage power supply 2, and the other end is grounded. The multiple discharge needles 3 are respectively connected to the high-voltage power supply 2. The multiple discharge needles 3 are respectively installed on the separator roll 4, and are perpendicular to the separator roll 4 in the width direction. The separator roll 4 is wound on a separator roller 5.

[0029] The multiple discharge needles 3 are all disposed on one side of the diaphragm roll 4 or on both sides of the diaphragm roll 4 respectively.

[0030] Multiple discharge needles 3 located on the same side of the diaphragm roll 4 are arranged at intervals along the conveying direction of the diaphragm roll 4 to form an antistatic strip.

[0031] The discharge needles 3 are all perpendicularly pointed to the diaphragm roll 4.

[0032] The distance between the tip of the discharge needle 3 and the surface of the diaphragm roll 4 is set to 20-100mm.

[0033] The antistatic strip composed of multiple discharge needles 3 has an antistatic length of 50-300mm in the width direction.

[0034] The spacing between adjacent discharge needles 3 is 10-20 mm.

[0035] The operating voltage of the high-voltage power supply 2 is 3KV-6KV.

[0036] In this embodiment, the spacing between adjacent discharge needles 3 is 10-20mm, which is convenient to match the range of corona discharge generated at the front end of the discharge needle 3, so as to eliminate static electricity on the diaphragm better and faster; in specific use, the working voltage of the high voltage power supply is 3KV-6KV, the static discharge speed is less than or equal to 0.05s, and the ion balance is ±10V.

[0037] In this embodiment, when using it specifically, refer to Figure 2 When the winding machine starts working, the diaphragm roll 4 begins to unwind. After the diaphragm is transmitted by the diaphragm roller 5, it is destaticated by the static elimination device of this utility model.

[0038] This invention relates to a static eliminator mechanism for the separator during the winding process of a lithium-ion battery. It neutralizes static electricity on the surface of the separator roll 4, achieving the purpose of eliminating static electricity. In use, this invention applies voltage to multiple discharge needles 3 via a high-voltage power supply 2, causing corona discharge at the tip of the needles 3. This ionizes and decomposes the air around the needles 3, generating positive and negative ions. These ions neutralize the static electricity on the separator roll 4, thereby eliminating static electricity. Furthermore, the multiple discharge needles 3 are positioned on one side of the separator roll 4 or on both sides, which accelerates the elimination of static electricity. The static eliminator band of this invention can be adjusted by changing the number of discharge needles 3, the spacing between adjacent discharge needles 3, and the distance between the discharge needles 3 and the separator roll 4, thereby accelerating the elimination of static electricity. This invention has the advantages of reasonable structure, convenient assembly, static neutralization, and rapid static elimination.

Claims

1. A separator static elimination mechanism for the winding process of a lithium-ion battery, comprising a grounding wire and multiple discharge needles, characterized in that: One end of the grounding wire is electrically connected to the high-voltage power supply, and the other end is grounded; multiple discharge needles are respectively connected to the high-voltage power supply; multiple discharge needles are respectively installed on the diaphragm roll, and the width direction fully covers and points perpendicularly to the diaphragm roll; the diaphragm roll is wound on the diaphragm roller; multiple discharge needles are all set on one side of the diaphragm roll or respectively set on both sides of the diaphragm roll; multiple discharge needles located on the same side of the diaphragm roll are arranged at intervals along the conveying direction of the diaphragm roll and form an antistatic belt; the distance between the tip of the discharge needle and the surface of the diaphragm roll is set to 20-100mm; the operating voltage of the high-voltage power supply is 3KV-6KV.

2. The electrostatic discharge mechanism for the separator during the winding process of a lithium-ion battery according to claim 1, characterized in that: The discharge needles are all pointed vertically towards the diaphragm roll.

3. The electrostatic discharge mechanism for the separator during the winding process of a lithium-ion battery according to claim 1, characterized in that: The antistatic strip, composed of multiple discharge needles, has an antistatic length of 50-300 mm in the width direction.

4. The electrostatic discharge mechanism for the separator during the winding process of a lithium-ion battery according to claim 1, characterized in that: The spacing between adjacent discharge needles is 10-20 mm.

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