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Drying method and drying device for pole pieces in pole piece plating process of lithium battery

A battery pole piece and drying device technology, which is applied to the surface coating liquid device, coating, pretreatment surface, etc., can solve the problems of high energy consumption and low heating efficiency, so as to reduce radiant heat energy and reduce energy consumption. Consumption, the effect of reducing energy consumption

Inactive Publication Date: 2015-12-16
RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of low heating efficiency and high energy consumption of the above-mentioned existing pole piece heating methods, the present invention provides a pole piece heating method using high-frequency induction and medium-frequency induction heating

Method used

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  • Drying method and drying device for pole pieces in pole piece plating process of lithium battery
  • Drying method and drying device for pole pieces in pole piece plating process of lithium battery
  • Drying method and drying device for pole pieces in pole piece plating process of lithium battery

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Example 1: Single-sided intermittent coating and drying (aqueous solvent, pole piece heating temperature range: 70-90°C)

[0025] Such as figure 1 As shown, the battery pole piece coated with electrode slurry intermittently on one side uses a roller to pass through the induction heating coil loaded with medium-frequency or high-frequency alternating current, thereby loading an alternating electromagnetic field on the pole piece. The metal foil of the pole piece is heated rapidly, and the temperature rises to the required drying temperature in a short time. A photoelectric sensor to determine whether an area of ​​paste or blank foil passes through the temperature measuring cell. When the infrared measurement probe installed in the induction heating coil detects that the temperature of the metal foil on the uncoated surface reaches or exceeds the upper limit of the temperature set above, the infrared temperature controller outputs a control signal to the control box (con...

Embodiment 2

[0026] Embodiment 2: double-sided intermittent coating and drying (solvent is the pole piece of NMP solvent: 120~150 ℃)

[0027] as in figure 2 In the embodiment of double-sided intermittent coating induction heating and drying shown, the pole piece coated with electrode slurry on both sides passes through the induction heating coil loaded with medium-frequency or high-frequency alternating current, thereby applying an alternating electromagnetic field to the pole piece. The metal foil of the pole piece is heated rapidly, and the temperature rises to the required working temperature in a short time. A photoelectric sensor is provided, and when the photoelectric sensor detects that the slurry coating layer runs to the induction heating coil, the control box receives the temperature measurement control signal from the infrared temperature measuring probe. When the photoelectric sensor senses that the metal foil that is not coated with the electrode slurry runs to the induction...

Embodiment 3

[0028] Embodiment 3: Continuous coating and drying on one side (the pole piece whose solvent is NMP solvent: 120~150° C.)

[0029] as in image 3 In the example of single-side continuous coating induction heating and drying shown in , the pole piece coated with electrode slurry on the first side passes through the induction heating coil loaded with medium-frequency or high-frequency alternating current, thereby loading an alternating electromagnetic field on the pole piece . The metal foil of the pole piece is heated rapidly, and the temperature rises to the required working temperature in a short time. When the photoelectric sensor senses that the slurry coating layer runs to the induction heating coil, the control box receives the temperature measurement control signal from the infrared temperature measuring probe. When the infrared temperature probe detects that the temperature of the metal foil reaches or exceeds the set temperature upper limit, the infrared temperature ...

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Abstract

The invention relates to a new pole piece heating drying manner in a pole piece plating process of a lithium battery in a lithium ion power battery production process. According to the driving method and the driving device, electrode slurry plating on the pole pieces is finished through an induction heating coil on which intermediate-frequency AC power or high-frequency AC power is applied. The heating drying manner belongs to self-induction heating of a metal material. Heating of circulation air or heating to an overhigh temperature is not required, and therefore the drying device does not radiate a large amount of heat to an external environment, thereby realizing high heat efficiency. Furthermore energy consumption in a heating process and a cooling process for a large amount of circulation air is greatly reduced. Additionally, energy consumption in eliminating a solvent which is carried in the circulation air is reduced. The heating manner makes an overall thermal efficiency higher than 90%. Because a metal foil self-induction heating is adopted, the slurry which is plated on a substrate is dried from inside to outside, and micro channels which improve battery performance can be formed in the coated material.

Description

technical field [0001] The invention relates to a new processing method in the coating process of lithium-ion power battery pole pieces, in particular to a new pole piece heating and drying method. Background technique [0002] In the current lithium-ion power battery production industry, the pole piece heating method usually adopted is: 1. The heating resistor directly heats and dries the circulating air, and then the circulating air heats the pole piece; 2. Heating the heat transfer oil, which is heated and dried by the heat transfer oil Circulating air, and then heat the pole piece by dry circulating air; 3. Heat the dry circulating air by high-temperature steam, and then heat the pole piece by dry circulating air. These heating methods all heat the pole pieces by the hot circulating air after heating a large amount of circulating air. This heating process releases a large amount of heat energy to the thermal radiation of the space environment, making the overall energy ...

Claims

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Application Information

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IPC IPC(8): B05D3/02B05D3/04
Inventor 张海舰巴振川张重德雷向利
Owner RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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