Vehicle electric power supply apparatus

A power supply device and power supply technology, which is applied to electrical devices, vehicle energy storage, vehicle components, etc., can solve the problem of inability to ensure and properly determine the generator to start the engine, etc., to prevent insufficient power supply and prevent output voltage from reducing. Effect

Active Publication Date: 2015-01-14
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, according to the vehicle power supply device of the prior art described above, when the output voltage of the auxiliary power supply falls below a predetermined value, and the voltage required to start the engine cannot be ensured by the generator, the switch is turned off and the main power supply is directly connected to the power supply. generator power
However, only judging whether the output voltage of the auxiliary power supply detected by the voltage sensor is lower than a predetermined value cannot actually properly judge whether or not the engine can be started by the generator, and there is a possibility of unnecessary direct power supply from the main power supply to the generator.

Method used

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  • Vehicle electric power supply apparatus
  • Vehicle electric power supply apparatus

Examples

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Embodiment Construction

[0037] Hereinafter, a power supply device for a vehicle according to an embodiment of the present invention will be described with reference to the drawings.

[0038]The vehicle power supply device 10 of the present embodiment is, for example, figure 1 It is mounted on the vehicle 1 as shown. The vehicle power supply device 10 includes at least a capacitor 11 (second power supply) as a rechargeable battery, a storage battery 12 (first power supply), a DC-DC converter 13, a controller 14 (control unit, idling stop unit), and a contactor 15 ( switch) and contactor relay 16 (switching part).

[0039] Vehicle 1 includes vehicle power supply unit 10, FI-ECU 17 (idling stop unit), starter solenoid switch (STMGSW) 18, starter relay 19, starter motor (STM) 20 (second electric load, electric motor), generator ( ACG) 21, internal combustion engine 22, electric load 23 (first electric load), ignition switch (IGSW) 24, first voltage sensor 25 (voltage detection section), second voltage ...

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PUM

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Abstract

A control unit (14) of a vehicle electric power supply apparatus (10) controls an opening and closing unit (16) to set a switch (15) to an OFF state and a voltage detection unit (26, 25) to detect an output voltage (VB) of a first power source (12) and an output voltage (VC) of a second power source (11) when a second electric load (20) is to be driven, and the control unit inhibits driving of the second electric load when the absolute value of the difference between the output voltage of the first power source and the output voltage of the second power source detected by the voltage detection unit is a predetermined first threshold value or less over a predetermined length of time.

Description

technical field [0001] The present invention relates to a power supply device for a vehicle. Background technique [0002] Conventionally, a power supply device for a vehicle is known, wherein a DC-DC converter is connected between a main power supply connected to an electric load and a sub power supply connected to a generator for starting an engine, and a power supply is provided between the main power supply and the sub power supply. switch (for example, refer to Japanese Patent Application Laid-Open No. 2010-195336). [0003] According to the power supply device for a vehicle of the prior art described above, it is preferable to prevent unexpected charging and discharging between the main power supply and the sub power supply by detecting whether or not there is an ON failure in which the switch is fixed in the on state. [0004] In addition, according to the vehicle power supply device of the prior art described above, when the output voltage of the auxiliary power sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00H01M10/48
CPCF02N11/0866B60L7/10B60R16/03B60L11/1868B60L58/20F02N11/04F02N11/0814F02N11/0825F02N11/0844F02N11/0848F02N11/087F02N11/108F02N2011/0874F02N2011/0885F02N2011/0888F02N2200/022F02N2200/063Y02T10/40Y02T10/70
Inventor 关口聪
Owner HONDA MOTOR CO LTD
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