Insulating tape for new energy battery and preparation method of insulating tape

By combining modified polyimide resin with epoxy resin E-51 crosslinking and modified nano-silica, the problems of high temperature resistance and electrolyte corrosion of new energy tapes have been solved, achieving high safety and long life insulation performance, making them suitable for new energy batteries.

CN120865805AActive Publication Date: 2025-10-31SUZHOU K-HIRAGAWA ELECTRONIC TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202511392472.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-26
Publication Date
2025-10-31
Estimated Expiration
2045-09-26

AI Technical Summary

Technical Problem

Traditional new energy tapes have poor high-temperature resistance, weak resistance to electrolyte corrosion, and insufficient insulation performance, which cannot meet the high safety and long life requirements of power batteries.

Method used

A high-density three-dimensional network molecular structure is formed by crosslinking modified polyimide resin with epoxy resin E-51, combined with pretreated glass fiber cloth and modified nano silica. The use of silane coupling agent KH-550 and triethylenetetramine ensures that the fiber cloth is tightly bonded to the resin matrix. A dense physical barrier layer is formed through multi-step modification of modified nano silica, which improves insulation and mechanical properties.

Benefits of technology

It maintains a stable insulation structure under extreme operating conditions, avoids the risk of short circuits, and retains insulation performance and mechanical strength even after long-term immersion in electrolyte, thereby improving the overall service life and safety of the battery.

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Abstract

The invention discloses an insulating tape for a new energy battery and a preparation method of the insulating tape, and relates to the technical field of new energy battery assemblies. The insulating tape for the new energy battery is prepared by coating pretreated glass fiber cloth with a coating, the coating is prepared from the following raw materials in parts by weight: 15 to 20 parts of modified polyimide resin, 2 to 4 parts of epoxy resin E-51, 71 to 77 parts of an ethanol / butanone mixed solvent, 3 to 5 parts of modified nano silicon dioxide, 0.2 to 0.4 part of a silane coupling agent KH-550, 0.1 to 0.3 part of polydimethylsiloxane, 0.1 to 0.2 part of paraffin-based mineral oil and 0.3 to 0.5 part of triethylene tetramine. The glass fiber cloth pretreatment material comprises deionized water and a 5%-8% sodium hydroxide solution. The insulating adhesive tape for the new energy battery contains the modified polyimide resin, so that the high temperature resistance and electrolyte resistance of the adhesive tape can be enhanced, the insulativity is improved, and the modified nano silicon dioxide is good in dispersity. The preparation process is fine, the glass fiber cloth is fully pretreated, the preparation process is standard, and the use requirements of new energy batteries can be met.
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