METHOD FOR CHARGING LITHIUM SECONDARY BATTERY AT LOW TEMPERATURE

摘要

The present invention relates to a low temperature charging method of a lithium secondary battery. The present invention charges the lithium secondary battery until the charging C-rate of the battery is 10% in a CV section in a low temperature CC-CV charging method at a temperature lower than 0. The C-rate of the battery is less than 0.4 C. the charging method of the present invention minimizes the generation of lithium alloys in a graphite based negative electrode at low temperatures, and minimizes the charging time.