| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a remaining battery capacitance calculation apparatus capable of more accurately calculating a remaining capacitance while taking into account a difference of a self-charging amount based on a difference of cell temperatures inside a battery. <P>SOLUTION: The remaining battery capacitance calculation apparatus includes a high temperature side temperature sensor 91U disposed at a position where a high temperature is forecasted inside a battery 36, and a low temperature side temperature sensor 91L disposed at a position where a low temperature is forecasted inside the battery 36. A value obtained by subtracting a minimum self-discharging amount SHmin derived on the basis of an output of the low temperature side temperature sensor 91L from a maximum self-discharging amount SHmax derived on the basis of an output of the high temperature side temperature sensor 91U is calculated as a present value Ft of a capacitance deviation amount of the battery 36, and a capacitance deviation subtraction amount F that is an integration value of the present value Ft of the capacitance deviation amount and a last value F0 of the capacitance deviation amount calculated in the last remaining capacitance calculation is used as a subtraction element from a full charging capacitance A. A self-discharging amount map 206m is provided for deriving the present value Ft of the capacitance deviation amount on the basis of both the temperature sensor outputs and a value of a battery charging rate. <P>COPYRIGHT: (C)2012,JPO&INPIT |
