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Lithium battery coating method

A coating method and technology for lithium batteries, which are applied to battery electrodes, devices for coating liquids on surfaces, coatings, etc., can solve the problems of a narrow range of active material specifications and a gradual increase in the width of the active material layer, and reduce defects. ratio, the effect of reducing the width defect rate, and reducing the coating tolerance

Active Publication Date: 2022-01-25
UNITED AUTO BATTERY CO LTD
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AI Technical Summary

Problems solved by technology

[0002] At present, battery capacity is gradually pursuing excellent design, squeezing out redundant space, and increasing the amount of effective active materials. Among them, the width of the cathode active material layer is gradually becoming smaller, and the specification range of the active material is becoming narrower, resulting in poor width of the active material layer. Gradually increase

Method used

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  • Lithium battery coating method

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Embodiment Construction

[0013] In order to make the content of the present invention more clearly understood, the present invention will be further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0014] like figure 1 As shown, a lithium battery coating method, the steps of the method contain:

[0015] When the first active material layer 2 is coated on the A side of the substrate layer 1, the first deviation correction device uses the first deviation correction reference line 3 as the tape travel centerline to correct the deviation of the base tape; wherein, the first deviation correction reference line 3 is the centerline of the substrate layer 1;

[0016] When the second active material layer 4 is coated on the B side of the substrate layer 1, the base tape coated with the first active material layer 2 is transported by the second deviation correction device with the second deviation correction reference line 5 as the central line of the...

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Abstract

The invention discloses a coating method for a lithium battery. The steps of the method include: when coating a first active material layer on the A side of a substrate layer, using a first deviation correction device to take the first deviation correction reference line as the center line of the tape Correct the deviation of the tape running of the base tape, wherein the first deviation correction reference line is the center line of the base material layer; Correcting the tape running of the base tape coated with the first active material layer for the tape running center line, wherein the second deviation correcting reference line is the center line of the first active material layer. The invention can improve the end-face alignment of active materials on both sides of the substrate layer, reduce coating tolerances, improve the process capability of the cathode edge ceramic width, reduce the defective rate, and improve the safety performance of lithium battery products.

Description

technical field [0001] The invention relates to a lithium battery coating method. Background technique [0002] At present, battery capacity is gradually pursuing excellent design, squeezing out redundant space, and increasing the amount of effective active materials. Among them, the width of the cathode active material layer is gradually becoming smaller, and the specification range of the active material is becoming narrower, resulting in poor width of the active material layer. Gradually increase. There are many factors affecting the poor width of the active material layer, such as excessive coating film width, A / B surface misalignment, insufficient die-cutting deviation correction ability, etc. Among them, the A / B surface misalignment accounts for more than 50% of the defective ratio, which needs to be improved urgently. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/139B05C13/02
CPCH01M4/0435H01M4/139B05C13/02Y02E60/10
Inventor 骆昌胜毕汉戎
Owner UNITED AUTO BATTERY CO LTD
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