Unlock instant, AI-driven research and patent intelligence for your innovation.

Power supply device for vehicle

A technology of power supply device and vehicle power supply, which is applied to vehicle components, current collectors, electric vehicles, etc., can solve the problems of inability to reduce base current and increased power consumption of vehicle power supply devices.

Inactive Publication Date: 2009-04-08
PIONEER CORP
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] However, if such a design is carried out, then it is nothing more than designing the resistance Ra which is only provided for driving the car-mounted electronic equipment with less power consumption such as car-mounted clocks and watches to be able to drive car-mounted audio equipment, etc., for example, during the standby period. load, so the base current Ia cannot be reduced during the normal standby period other than the transient period, resulting in a problem that the power consumption of the vehicle power supply itself increases.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Power supply device for vehicle
  • Power supply device for vehicle
  • Power supply device for vehicle

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0033] First, refer to image 3 The configuration of the first embodiment will be described.

[0034] This vehicle power supply device 100 is formed of a so-called discrete circuit, and is provided in, for example, a vehicle power supply (vehicle battery) 200 that outputs a battery voltage VB of 12V, and a plurality of components such as a vehicle radio, a vehicle audio equipment, and a vehicle clock that operate at 5V, for example. Between the in-vehicle electronic equipment (hereinafter referred to as “load”) 300 .

[0035] In addition, although not shown, wiring is connected between each load 300 and the output of the control transistor Qy so that when the ACC switch (auxiliary switch) is turned off by the ignition key, the output voltage Vo of the control transistor Qy described later Only the car clocks and the like that need to be kept in normal operation among the plurality of loads 300 are supplied, and when the ACC switch is turned on, in addition to the car clocks a...

no. 2 Embodiment approach

[0065] Below, refer to image 3 (b) The configuration of the second embodiment will be described. In addition, in image 3 In (b), use the same notation to denote and image 3 (a) The same or equivalent parts.

[0066] exist image 3 In (b), the vehicle power supply device 100 is configured to image 3 The vehicle power supply unit shown in (a) is provided with a charging circuit composed of a diode D and a capacitor C.

[0067] That is, the cathode and the anode of the diode D are respectively connected to the input terminal of the current value detection unit 400 and the positive terminal of the vehicle power supply 200, and the capacitor C is connected between the cathode of the diode D and the negative terminal (ground terminal) GND of the vehicle power supply 200, and the This constitutes a charging circuit.

[0068] Next, the operation of vehicle power supply device 100 having such a configuration will be described.

[0069] First, regardless of whether the ACC sw...

Embodiment 1

[0087] Below, refer to Figure 4 (a) Description image 3 A more specific example of the first embodiment shown in (a). Figure 4 (a) is a circuit diagram showing the structure of the vehicle power supply device of this embodiment, and the same symbols are used to denote and image 3 The same or equivalent part of the vehicle power supply unit in (a).

[0088] exist Figure 4 (a), with image 3 (a) The vehicle power supply device 100 of the present embodiment, which is provided between the vehicle power supply 200 outputting a battery voltage VB of 12V, for example, and a plurality of loads 300 operating at 5V, for example, is described in comparison with the vehicle power supply device of (a). The fixed resistors Rx and Ry of a predetermined resistance value connected in series between the collector of the control transistor Qy and the vehicle power supply 200 form the current value detection part 400, and the first switch part 600 is formed by the PNP transistor Q600. T...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A power device for the vehicle is connected with a control transistor (Qy) via a detection part of current value (400) between a vehicle power supply (200) and a load (300). The power device supplies base current (Ia) to the base of the control transistor (Qy) by an resistance (Ra). A current supply (500) and a first switch (600) are connected in series between the control transistor (Qy) and the vehicle power supply (200). A second switch (700) is connected between a connection point (P1) of the vehicle power supply (200) and the first switch (600) and the connection point (P2) of the control transistor (Qy) and the detection part of current value (400). During the reserve time of driving the load (300) of low power consumption, only the base current (Ia) is used to move the control transistor (Qy), which reduces the power consumption. When the load (300) of great power consumption is driven, the detection part of current value (400) detects the increase of the current flowing from the vehicle power supply (200) to the control transistor (Qy) to make the switch (600) and the switch (700) conductible.

Description

technical field [0001] The present invention relates to a vehicle power supply device for operating vehicle-mounted electronic equipment. Background technique [0002] As a conventional technique, it is known that there are figure 1 (a)(b) and figure 2 (a) A power supply device for a vehicle having the configuration shown in (b). [0003] figure 1 The shown conventional vehicle power supply device 10 is composed of a three-terminal regulator (3-terminal regulator) 40 provided in, for example, a vehicle power supply (vehicle battery) 20 that outputs a battery voltage VB of 12V, and a For example, between a car radio operating at 5V and a plurality of car electronic devices (hereinafter referred to as “loads”) 30 such as car audio equipment and car clocks. [0004] Here, the on-vehicle power supply 20 is connected to a power distribution line so that when the ignition switch SIG is turned on by the ignition key, electric power is also supplied to the starter motor M for s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B60L1/00B60R16/03G05F1/56
Inventor 井上隆男
Owner PIONEER CORP