Aluminum-plastic film structure for secondary rechargeable soft package battery

Abstract

The invention discloses an aluminum-plastic film structure for a secondary rechargeable soft package battery. The structure comprises an aluminum layer (1) provided with an anti-corrosion layer on each of an upper surface and a lower surface; an outer protective layer (3) and an insulation inner layer are respectively adhered on two anticorrosion layers (2); the insulation inner layer comprises a first insulation layer (4) adhered on the lower surface of the anticorrosion layer (2) at the lower side of the aluminum layer (1), and a second insulation layer (5) adhered on the lower surface of the first insulation layer, wherein the first insulation layer (4) is one of a PET layer, a PI layer and a PBT layer, and the second insulation layer (5) is one of a CPP layer, a PP layer, an EAA layer and a PE layer. The structure disclosed by the invention has higher security performance, and is convenient for stamping processing.

Description

technical field [0001] The invention relates to an aluminum-plastic film structure, in particular to an aluminum-plastic film structure used for secondary charging soft pack batteries. Background technique [0002] As we all know, a good aluminum-plastic film can keep the soft pack battery in a closed working environment during the use of the battery, prevent external moisture from entering the inside of the battery cell, destroy the battery reaction balance, and cause it to lose battery performance, thereby protecting the battery cell. Safety protection. However, in real life, the incidents of battery burning and harming the human body have occurred frequently. Part of the reason for the occurrence of such burning battery burning incidents is that the insulation of the aluminum-plastic film is low, and a micro-short circuit is formed between the negative electrode of the battery cell and the aluminum layer to corrode the aluminum. layer, causing the electro-fluid to flow o...

AI Technical Summary

Problems solved by technology

However, in real life, the incidents of battery burning and harming the human body have occurred frequently. Part of the reason for the occurrence of such burning battery burning incidents is that the insulation of the aluminum-plastic film is low, and a micro-short circuit is formed between the negative electrode of the battery cell and the aluminum layer to corrode the aluminum. layer, causing the electro-fluid to flow out and corrode the circuit, causing a short circuit

Considering that the aluminum-plastic film needs to be stamped during battery processing, blindly increasing the thickness of the insulating layer of the aluminum-plastic film will lead to a decrease in its deep-drawing ability and greatly increase the processing difficulty

Images