NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY CHARGING METHOD, ELECTRONIC DEVICE, BATTERY PACK, AND CHARGING DEVICE

摘要

It is possible to rapidly charge a non-aqueous electrolyte secondary battery having a heat-resistant layer between a negative electrode and a positive electrode. Provided is a method for charging the non-aqueous electrolyte secondary battery having a heat-resistant layer between the negative electrode and the positive electrode. The method includes: a step of performing a pulse charge on the secondary battery; a step of detecting a voltage change amount accompanying the change of the concentration polarization of the non-aqueous electrolyte as a polarization voltage; and a step of terminating the pulse charge when the polarization voltage exceeds a predetermined threshold value. Thus, it is possible to rapidly charge the non-aqueous electrolyte secondary battery having the heat-resistant layer between the negative electrode and the positive electrode without causing excessive charge.