Patent ID: 8428804

Claim:
An in-vehicle charge and discharge control apparatus in a vehicle having a battery to supply an electric power to an electronic apparatus in the vehicle, the battery accumulating an electric power which a motor in the vehicle generates by regeneration during deceleration of the vehicle, the in-vehicle charge and discharge control apparatus comprising: a battery temperature control device to execute a cooling control when a battery temperature is equal to or greater than a battery upper limit temperature, the cooling control executing a battery restriction strengthening control which reduces in the battery a maximum of an input and output power to the electronic apparatus; an estimate device to estimate a temperature increase of the battery in an estimate road range, which the vehicle is estimated to travel, based on an estimate of energy acquirable by regeneration in the estimate road range; a temperature designation device to designate as a special value of the battery upper limit temperature a temperature obtained by subtracting the temperature increase from a default value of the battery upper limit temperature; a road range designation device to designate a road range just prior to the estimate road range as a battery upper limit temperature reduction road range; and a change device to cause the battery temperature control device to execute a battery upper limit temperature changeover control that changes a value of the battery upper limit temperature from the default value to the special value in cases that the vehicle is running the battery upper limit temperature reduction road range, and returns the value of the battery upper limit temperature from the special value to the default value in cases that the vehicle completes traveling of the battery upper limit temperature reduction road range and enters the estimate road range.