Abstract: The different electrolyte formula effects on self-discharge properties of the nickel-metal hydride batteries in earlier and later periods are stadied.At the same time,the capacity-keeping rate of the battery with different electrolyte formula at different temperatures are researched.The results show that the capacity-keeping rate of the nickel-metal hydride battery has upward trend with the increase of the proportion of NaOH,and the capacity-keeping rate in the earlier period is higher than that...

Key words: nickel hydrogen battery； electrolyte； the earlier period self-discharge； the later period self-discharge； capacity-keeping rate；