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Vacuum baking method for electrode roll

A baking method and electrode roll technology, applied in electrode manufacturing, electrode heat treatment, drying and other directions, can solve the problems of vacuum rate pole roll dislocation and other problems

Inactive Publication Date: 2021-05-04
昆山聚创新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the problems existing in the prior art, the object of the present invention is a vacuum baking method for electrode coils. To solve the above problems, the present invention improves the vacuum in the cavity by adding a proportional valve control to the vacuum suction pipeline of the existing baking cavity. Excessive vacuum rate leads to the misalignment of pole rolls; controlling the tension of pole rolls avoids the problem of misalignment and breakage of pole rolls after baking, and significantly improves the yield rate of pole roll drying

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  • Vacuum baking method for electrode roll

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Experimental program
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Effect test

Embodiment 1

[0045] This embodiment provides a vacuum baking method for a positive electrode roll, the vacuum baking method includes: placing the rolled electrode roll in a vacuum baking device for baking;

[0046] The vacuum baking device includes a vacuuming device 1 and a drying chamber 5 connected in sequence, such as figure 1 shown;

[0047] The vacuum equipment 1 is connected to the drying chamber 5 through a pipeline 2;

[0048] The drying chamber 5 is also connected with a nitrogen gas pipeline 4;

[0049] A control proportional valve 3 is provided at the interface between the pipeline 2 and the drying chamber 5;

[0050] The drying chamber 5 is provided with a pole core heating device 8, and the inner wall of the drying chamber is provided with an air hole 6, and the air hole 6 is used for ventilation or exhaust; the diameter of the air extraction pipe 2 is 170 mm;

[0051] When the electrode roll 7 is a positive roll, the tension in the winding is 100N, and a touch roller is a...

Embodiment 2

[0054] This embodiment provides a vacuum baking method for a positive electrode roll, the vacuum baking method includes: placing the rolled electrode roll in a vacuum baking device for baking;

[0055] The vacuum baking device includes a vacuum device and a drying chamber connected in sequence;

[0056] The vacuuming equipment and the drying chamber are connected through pipelines;

[0057] The drying chamber is also connected with a nitrogen pipeline;

[0058] A control proportional valve is provided on the pipeline and at the interface of the drying chamber;

[0059] The drying chamber is provided with pole reel heating equipment, and the inner wall of the drying chamber is provided with air holes, and the air holes are used for ventilation or exhaust; the diameter of the exhaust pipe is 200mm;

[0060] When the electrode roll is a positive roll, the tension in the winding is 120N, and a touch roller is arranged above the winding roller in the winding;

[0061] After dryi...

Embodiment 3

[0063] This embodiment provides a vacuum baking method for a negative electrode roll, the vacuum baking method includes: placing the rolled electrode roll in a vacuum baking device for baking;

[0064] The vacuum baking device includes a vacuum device and a drying chamber connected in sequence;

[0065] The vacuuming equipment and the drying chamber are connected through pipelines;

[0066] The drying chamber is also connected with a nitrogen pipeline;

[0067] A control proportional valve is provided on the pipeline and at the interface of the drying chamber;

[0068] The drying chamber is provided with pole reel heating equipment, and the inner wall of the drying chamber is provided with air holes, and the air holes are used for ventilation or exhaust; the diameter of the exhaust pipe is 150mm;

[0069] When the electrode roll is a negative electrode roll, the tension in the winding is 80N, the taper tension in the winding is controlled at 30%, and a touch roller is arrang...

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Abstract

The invention relates to a vacuum baking method for an electrode roll. The vacuum baking method comprises the steps that the electrode roll obtained after rolling and slitting is placed in a vacuum baking device to be baked; the vacuum baking device comprises vacuum pumping equipment and a drying cavity which are connected in sequence; the drying cavity is further connected to a nitrogen feeding pipeline; a control proportional valve is arranged at a joint of an exhaust pipe and the drying cavity; and the winding tension of the electrode roll ranges from 80 N to 120 N, and a touch roller is arranged above the winding roller in the winding process. According to the baking method provided by the invention, the problems of dislocation and breakage of the electrode roll in the vacuum process are solved by arranging the vacuum proportional valve, adjusting the tension of the electrode roll and increasing the touch roller, secondary damage of the electrode roll in the drying process is avoided, and the drying yield of the electrode roll is remarkably improved.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a vacuum baking method for electrode rolls. Background technique [0002] Lithium batteries refer to batteries containing lithium (including metal lithium, lithium alloys, lithium ions, and lithium polymers) in the electrochemical system. Lithium-ion batteries have many advantages such as high energy density, long cycle life, and low self-discharge rate. With the increasing demand in the field of power and energy storage, the lithium battery industry has developed rapidly in recent years. According to the shape of lithium batteries, they can be roughly divided into three categories: cylindrical, square shell, and flexible packaging; flexible packaging lithium batteries have obvious advantages in energy density, and the current single cells are also developing in the direction of large capacity and high rate. It will be more in line with the requirements for mobile power in field...

Claims

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Application Information

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IPC IPC(8): F26B5/04F26B9/06F26B21/14F26B23/04H01M4/04
CPCF26B5/04F26B9/06F26B21/14F26B23/04H01M4/0471Y02E60/10
Inventor 黎帆张明杰常柯
Owner 昆山聚创新能源科技有限公司