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Driving method of electrochemical device

  • US 9,787,126 B2
  • Filed: 02/05/2014
  • Issued: 10/10/2017
  • Est. Priority Date: 02/08/2013
  • Status: Active Grant
First Claim
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1. A driving method of an electrochemical device comprising the step of:

  • after the electrochemical device comprising a battery is used and capacity of the battery is reduced by 10% or more from an initial value, supplying reverse pulse current to the battery multiple times during charge to make a capacity reduction less than 5% of the initial value,wherein a period during which the reverse pulse current flows is longer than or equal to 3 seconds and shorter than or equal to 30 seconds,wherein the battery comprises a positive electrode, a negative electrode, a separator, and an electrolyte solution,wherein the separator has a plurality of minute holes serving as paths through which lithium ions move between a pair of electrodes during charge and discharge,wherein a hole in the separator is clogged by lithium deposits after the electrochemical device comprising a battery is used and capacity of the battery is reduced by 10% or more from an initial value, andwherein the charge current is constant during two the reverse pulse currents.

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