The embodiment of the invention discloses a battery temperature
estimation value optimization method, which is applied to a battery
temperature measurement instrument, and comprises the following steps: carrying out fixed-point collection on a
voltage difference value of a
battery cell according to a preset temperature
estimation value optimization strategy until a preset
battery cell voltage difference threshold value is reached, and obtaining
battery cell temperature change information of the battery
cell in the process of carrying out fixed-point collection on the
voltage difference value, calculating an
internal resistance value and an actual voltage value of the battery
cell according to a temperature
estimation optimization strategy; calculating to obtain a corresponding actual resistance value by using an actual resistance operation
algorithm and based on the
internal resistance value, the actual voltage value, the reference voltage value and the pull-up resistance value in the calculation result; and calculating according to a preset ratio relation between the actual resistance value and the actual
operating temperature of the battery
cell to obtain a current battery cell temperature value, and generating corresponding battery cell temperature estimation value optimization information. The method can adapt to
temperature measurement of the battery under different working currents, and it is ensured that the temperature of the battery can be effectively monitored under various working conditions.