In-vehicle charge and discharge control apparatus and partial control apparatus

• US 20110066310A1
• Filed: 08/31/2010
• Published: 03/17/2011
• Est. Priority Date: 09/11/2009
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Yamada, Kazunao, Mizuno, Yusuke, Sakai, Tadashi
• Granted Patent: US 8,428,804 B2
• Time in Patent Office: Days
• US Class Current: 701/22
• CPC Class Codes: B60L 1/00 Supplying electric power to auxiliary equipment of vehicles circuit arrangements for charging batteries H02J7/00
• CPC Class Codes: B60L 7/16 for vehicles comprising converters between the power source and the motor

Abstract

A temperature increase of a battery of a vehicle in a schedule effect road range is estimated based on an estimate of energy acquirable by regeneration in the schedule effect road range of the vehicle. A special value of the battery upper limit temperature is designated which is obtained by subtracting the temperature increase from a default value of the battery upper limit temperature. A battery upper limit temperature reduction road range is designated which is located just prior to the schedule effect road range. While the vehicle runs the battery upper limit temperature reduction road range, the battery upper limit temperature is set at the special value by being switched from the default value. When the vehicle completes running the battery upper limit temperature reduction road range and starts running the schedule effect road range, the battery upper limit temperature is returned to the default value from the special value.

Claims

1. 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 section configured 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 section configured 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 section configured 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 section configured to designate a road range just prior to the estimate road range as a battery upper limit temperature reduction road range; and

a change section configured to cause the battery temperature control section 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.

2. The in-vehicle charge and discharge control apparatus according to claim 1, further comprising:

a schedule preparation section configured to previously designate a control index value about a charge and discharge of the battery with respect to each of a plurality of index designation road divisions, which the estimate road range is divided into, under a premise that the cooling control is not executed in the estimate road range; and

a charge and discharge control section configured to

determine a delivery and reception amount of a requested electric power based on (i) a present requested driving power of the vehicle and (ii) a control index value corresponding to a present position of the vehicle out of control index values designated by the schedule preparation section in cases that the vehicle is running the estimate road range, and

control the motor as the electronic apparatus so as to satisfy the determined delivery and reception amount of the requested electric power.

3. The in-vehicle charge and discharge control apparatus according to claim 1, further comprising:

a determination section configured to make a determination as to whether a first case enables the battery to accumulate more energy than a second case,

the first case where during running of the battery upper limit temperature reduction road range, the battery upper limit temperature is set at the special value by being changed from the default value,

the second case where during running of the battery upper limit temperature reduction road range, the battery upper limit temperature reduction is set to the default value by not being changed to the special value,

the change section being further configured to cause the battery temperature control section to execute the battery upper limit temperature changeover control based on an affirmative result of the determination made by the determination section.

4. The in-vehicle charge and discharge control apparatus according to claim 2, further comprising:

a determination section configured to make a determination as to whether a first case enables the battery to accumulate more energy than a second case,

the first case where during running of the battery upper limit temperature reduction road range, the battery upper limit temperature is set at the special value by being changed from the default value,

the second case where during running of the battery upper limit temperature reduction road range, the battery upper limit temperature reduction is set to the default value by not being changed to the special value; and

a prohibition section configured to prohibit the schedule preparation section from designating the control index values in the estimate road range based on a negative result of the determination made by the determination section.

5. The in-vehicle charge and discharge control apparatus according to claim 1, wherein

the change section causes the battery temperature control section to execute the battery upper limit temperature changeover control in cases that the battery temperature in a travel history of the estimate road range is equal to or greater than the default value of the battery upper limit temperature.

6. A partial control apparatus included in the in-vehicle charge and discharge control apparatus according to claim 1, the apparatus comprising:

the estimate section;

the temperature designation section;

the road range designation section; and

the change section.