Zakaj uporabljati nikelj v bateriji

Nickel is a metal with important industrial value. Its melting point is 1453℃, boiling point is 3075℃, and specific gravity is 8.8g/cm ³. It has excellent corrosion resistance, is not easy to oxidize in the air, and can remain stable even when heated to 700~800℃. At the same Čas, ima dobro varljivost . Te značilnosti se široko uporabljajo v baterijskih paketih.

Učinkovitost varjenja in povezave kot prehodni sloj za heterogene materiale je nikelj primeren za zapletene scenarije povezave v bateriji:
1. bakrena aluminijasta povezava: ultrasonic welding requires horizontal tension>=1500N, vertical tension>=500N, and residual welding area>=1/3. Nickel can alleviate the melting point difference between copper (1083℃) and aluminum (660℃) and reduce brittle intermetallic compounds.
2. Aluminijasta nikelj povezava: The vertical tensile force per unit width is required to be>=3n/mm for polymer diffusion welding. The compatibility of nickel can offset the difference in thermal expansion between aluminum (23.1 × 10 ⁻⁶/℃) and nickel (13.3 × 10 ⁻⁶/℃) to avoid loose connection.
3. Zdravljenje z avtobusom:Izhodni vodni vrstici sprejmejo električno nikljevo oblogo ali nikljevo oblogo (slednja je bolj enakomerna, vendar so stroški visoki), zmanjšanje varilnih pore in razpok ter izboljšanje trdnosti povezave .

With the core characteristics of "strong corrosion resistance, excellent weldability and stable mechanical properties", nickel and nickel alloys have become the ideal protection and connection materials for copper and aluminum bars in battery packs, as well as the key components for voltage acquisition. The application of nickel sheet mainly solves the problems of dissimilar metal connection and corrosion protection, so as to ensure the safety and performance stabilnost baterije .