| 摘要 |
The soldering connector according to the present invention, which electrically connects a plurality of unit cells to each other, comprises a lead-free alloy including tin (Sn) and copper (Cu). According to the present invention, when a secondary battery overheats due to the malfunction thereof, electrical connection between unit cells comprised in a battery module rapidly disconnects under a relatively low temperature and current range, thereby ensuring the safety of the secondary battery.
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