| 摘要 |
PROBLEM TO BE SOLVED: To safely release the accumulated energy by overcharge by adding a monomer for generating a conductive material by polymerization in an electrolyte in overcharge, and automatically internally discharging it when the battery voltage exceeds a maximum operating pressure. SOLUTION: To an electrolyte is mixed a monomer additive for generating a conductive polymer by polymerization at a battery voltage exceeding a maximum operating voltage and generating an internal short-circuit in the battery. The quantity of the monomer additive must be sufficient for the generated polymer to actually crosslink both a positive electrode and a negative electrode to short-circuit the battery. A quantity of the monomer additive less than 5 wt.% is sufficient for the mixture of the electrolyte with the monomer additive. As the monomer additive, an aromatic additive can be used. Biphenyl is particularly suitable for a lithium ion type battery having an operating voltage within 4 V, and it is mixed in about 2-3% to the electrolyte mixture. |
