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 h

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
Comparison scheme
Effect test

Example Embodiment

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

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

Example Embodiment

[0026] Example 2: Double-sided intermittent coating and drying (Pole piece with NMP solvent: 120~150℃)

[0027] As in figure 2 In the double-sided intermittent coating induction heating drying embodiment, the pole piece coated with electrode paste on both sides passes through an induction heating coil loaded with intermediate frequency or high-frequency alternating current, thereby loading an alternating electromagnetic field on the pole piece. The pole piece metal foil is heated rapidly, and the temperature rises to the required working condition temperature in a short time. Equipped with a photoelectric sensor, 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 of the infrared temperature probe. When the photoelectric sensor senses that the metal foil that is not coated with electrode paste runs to the induction heating coil, the control box does not accept t...

Example Embodiment

[0028] Example 3: Single-sided continuous coating and drying (Pole piece with NMP solvent: 120~150℃)

[0029] As in image 3 The single-sided continuous coating induction heating drying example shown in the first side of the pole piece coated with electrode paste passes through an induction heating coil loaded with medium frequency or high frequency alternating current, thereby loading an alternating electromagnetic field on the pole piece . The pole piece metal foil is heated rapidly, and the temperature rises to the required working condition 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 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 controller outputs a control signal to the co...

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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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