Method for warming up the battery using battery warm up device

摘要

The battery preheating method according to the present invention comprises: a first step of measuring the temperature of each part cell using the temperature sensor; A second step in which the battery management system determines whether there is a pre-heating required part cell out of a preset reference temperature among each part cell; A third step in which the battery management system determines whether the charging rate of the auxiliary battery is greater than or equal to a reference value when there is a pre-heating required part cell in the second step; A fourth step in which the battery management system sets the auxiliary battery as a preheating power when the charging rate of the auxiliary battery is greater than or equal to a reference value in the third step; A fifth step in which the battery management system sets the preheating order of the parts cells that require preheating in the order of high temperature; A sixth step of preheating the highest-priority part cell having the highest temperature among the plurality of pre-heating required part cells by using a set preheating power source; A seventh step in which the battery management system determines whether the temperature of the pre-heated part cell is higher than a reference temperature; An eighth step in which the battery management system stops preheating of the part cells when the temperature of the part cells being preheated in the seventh step is higher than a reference value; A ninth step of determining whether the temperature of all the part cells is higher than a reference temperature using the temperature sensor; And a step 10 in which the battery management system stops all preheating processes when the temperatures of all the part cells in the ninth step are greater than or equal to a reference temperature.