Preparation method and application of lithium ion battery diaphragm with heat absorption performance
By using a mixture of hexagonal magnesium hydroxide and boehmite in lithium-ion battery separators and optimizing the coating process, the shortcomings of lithium-ion battery separators in thermal management are solved, and efficient thermal conductivity and heat absorption performance and battery safety are improved.
Patent Information
- Application Number
- CN202511046110.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-29
- Publication Date
- 2025-09-12
AI Technical Summary
Existing lithium-ion battery separators lack thermal management capabilities and are unable to cope with battery thermal runaway. In addition, coating technology has problems such as insufficient heat absorption performance, high cost, and poor stability, which affect the safety and reliability of the battery.
A mixture of hexagonal flaky magnesium hydroxide and boehmite is used as filler. By optimizing the coating process, a lithium-ion battery separator with heat absorption properties is prepared. Combined with a specific proportion of binder and wetting agent, a stable coating structure is formed, which improves the thermal conductivity, heat absorption and mechanical strength of the separator.
It achieves efficient heat conduction and heat absorption effects of lithium-ion battery separators, delays the occurrence of thermal runaway, improves battery energy density and safety, reduces the temperature gradient inside the battery, and avoids aging and performance degradation of electrode materials.