Patents Assigned to NEC Moli Energy (Canada) Ltd.
  • Polymerizable aromatic additives for overcharge protection in non-aqueous rechargeable lithium batteries
    Patent number: 5879834
    Abstract: Non-aqueous rechargeable lithium batteries can be protected against overcharge abuse by incorporating small amounts of suitable aromatic additives into the electrolyte. The additives are electrochemically polymerized at abnormally high voltages, thereby increasing the internal resistance of the battery and thus protecting it. Aromatic additives such as biphenyl, 3-chlorothiophene, and furan are particularly suitable for certain lithium ion batteries. The additives need not and may preferably not polymerize during overtemperature abuse.
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: March 9, 1999
    Assignee: NEC Moli Energy (Canada) Ltd.
    Inventor: Huanyu Mao