Vehicle power source device

Patent metadata

Field	Value
Publication number	US-9856847-B2
Application number	US-201615223824-A
Country	US
Kind code	B2
Filing date	Jul 29, 2016
Priority date	Jul 31, 2015
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

A vehicle power source device includes a first group that includes a first battery and a first load group which is connected with the first battery, a second group that includes a second battery or includes the second battery and a second load group which is connected with the second battery, a third group that includes a starting device which starts an internal combustion engine and a capacitor, a first switch that is provided between the first group and the second group, a second switch that is provided between the second group and the third group, a third switch that is provided between the first group and the third group, and a control unit that performs control to turn the first switch off, the second switch off, and the third switch on in a case where the internal combustion engine is started.

First claim

What is claimed is:

1. A vehicle power source device comprising:
an electrical circuit and components which comprise,
a first group that comprises a first battery and a first load group which is connected with the first battery,
a second group that comprises a second battery or comprises the second battery and a second load group which is connected with the second battery,
a third group that comprises a starting device which starts an internal combustion engine of a vehicle and a capacitor,
a first switch that is provided between the first group and the second group to connect or disconnect these groups,
a second switch that is provided between the second group and the third group to connect or disconnect these groups, and
a third switch that is provided between the first group and the third group to connect or disconnect these groups; and

a controller configured to cause the starting device to start the internal combustion engine and configured to, when the starting device starts the internal combustion engine, perform the following control to: (i) turn the first switch off, thereby disconnecting the first group and the second group; (ii) turn the second switch off, thereby disconnecting the second group and the third group; and (iii) turn the third switch on, thereby connecting the first group and the third group.

2. The vehicle power source device according to claim 1 ,
wherein the second load group comprises an in-vehicle apparatus which requires a longer period of time to be activated than the first load group, an in-vehicle apparatus which is required for a driving operation of the vehicle, or a processor that controls the in-vehicle apparatus required for the driving operation.

3. The vehicle power source device according to claim 1 , further comprising:
a fourth switch that is provided between the second battery and the second load group to connect or disconnect the second battery and the second load group; and
a fifth switch that is provided between the capacitor and the starting device to connect or disconnect the capacitor and the starting device,
wherein the controller is further configured to temporarily stop the internal combustion engine and later restart the internal combustion engine in accordance with a predetermined condition, the controller being configured to, when the internal combustion engine is restarted, perform the following control to: turn the first switch on; the second switch off; the third switch off; the fourth switch on, thereby connecting the second battery and the second load group; and the fifth switch on, thereby connecting the capacitor and the starting device.

4. The vehicle power source device according to claim 3 ,
wherein the controller performs control to turn the first switch on, the second switch on, the third switch off, the fourth switch on, and the fifth switch when the internal combustion engine is being temporarily stopped.

5. The vehicle power source device according to claim 3 ,
wherein the controller is further configured to cause a generator of the vehicle to output regenerative power and to, when the generator outputs the regenerative power, perform the following control to turn the first switch on, the second switch on, the third switch off, the fourth switch on, and the fifth switch on.

6. The vehicle power source device according to claim 3 ,
wherein the controller is further configured to start or stop the internal combustion engine upon receiving a signal from an ignition switch of the vehicle and configured to, upon receiving the signal from the ignition switch to stop the internal combustion engine, perform the following control to turn the first switch on, the second switch on, the third switch off, the fourth switch on, and the fifth switch on.

7. The vehicle power source device according to claim 3 ,
wherein the controller performs the following control to turn the first switch on, the second switch on, the third switch off, the fourth switch on, and the fifth switch off, when the capacitor is being charged.

8. The vehicle power source device according to claim 3 ,
wherein the controller is further configured to detect abnormality of the capacitor and to, when it detects the abnormality of the capacitor, perform the following control to turn the first switch on, the second switch on, the third switch off, the fourth switch on, and the fifth switch off.

9. The vehicle power source device according to claim 3 ,
wherein the controller is further configured to defect abnormality of the second battery and to, when it detects the abnormality of the second battery, perform the following control to turn the first switch on, the second switch on, the third switch off, the fourth switch off, and the fifth switch on.

10. The vehicle power source device according to claim 1 , further comprising:
a fourth switch that is provided between the second battery and the first and second switches to connect or disconnect the second battery and the first and second switches,
wherein the controller is further configured to temporarily stop the internal combustion engine and later restart the internal combustion engine in accordance with a predetermined condition, the controller being configured to, when the internal combustion engine is restarted, perform the following control to turn the first switch on, the second switch off, the third switch off, and the fourth switch on.

11. The vehicle power source device according to claim 1 ,
wherein the controller performs the following control to turn the first switch on, the second switch on, the third switch off, and the fourth switch when the internal combustion engine is being temporarily stopped.

12. The vehicle power source device according to claim 1 ,
wherein the controller is further configured to cause a generator of the vehicle to output regenerative power and to, when the generator outputs the regenerative power, perform the following control to turn the first switch on, the second switch on, the third switch off, and the fourth switch on.

13. The vehicle power source device according to claim 1 ,
wherein the controller is further configured to start or stop the internal combustion engine upon receiving a signal from an ignition switch of the vehicle and configured to, upon receiving the signal from the ignition switch to stop the internal combustion engine, perform the following control to turn the first switch on, the second switch on, the third switch off, and the fourth switch on.

14. The vehicle power source device according to claim 1 ,
wherein the controller performs the following control to turn the first switch on, the second switch on, and the third switch off when the capacitor is being charged.

Assignees

• Honda Motor Co Ltd

Inventors

• Sekiguchi Satoshi

Classifications

• F02N11/0866 Primary

  comprising several power sources, e.g. battery and capacitor or two batteries · CPC title

• F02N2011/0885

  Capacitors, e.g. for additional power supply · CPC title

• F02N11/0822

  related to action of the driver · CPC title

• F02N2200/102

  Brake pedal position · CPC title

• F02N2200/101

  Accelerator pedal position · CPC title