An aluminum-plastic film, a preparation method thereof, a battery, a battery pack, and an electrical device
By introducing flame-retardant polymers and inorganic fibers into aluminum-plastic films to form a dense cross-linked network structure, the insufficient flame-retardant performance and creep problems of aluminum-plastic films are solved, thereby improving the safety and reliability of solid-state batteries.
Patent Information
- Authority / Receiving Office
- CN Β· China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BYD CO LTD
- Filing Date
- 2026-01-19
- Publication Date
- 2026-06-02
AI Technical Summary
Existing aluminum-plastic films have poor flame retardant properties and are prone to creep under long-term pressure, which can lead to a reduction in the thickness of the insulation layer, posing a short circuit risk. Furthermore, they can become flammable materials during thermal runaway, exacerbating the thermal runaway process and failing to meet the high safety requirements of solid-state batteries.
A composite adhesive layer containing flame-retardant polymer is used. The flame-retardant polymer is composed of a matrix resin and phosphorus-containing epoxy structural units, forming a dense cross-linked network structure. Combined with inorganic fibers, it improves mechanical strength and flame-retardant properties and prevents flame retardant migration.
It significantly improves the mechanical strength and flame retardant properties of aluminum-plastic film, enhances the safety protection capability of battery cell packaging materials under thermal runaway conditions, and ensures mechanical reliability during long-term service.
Smart Images
Figure CN122136531A_ABST