JPH11105647A - Vehicular power feed equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide vehicular power feed equipment that delivers power with reliability through suppression of heat caused by a power-line switch means set in a power line and of its resultant deterioration in quality. SOLUTION: A vehicular power feed equipment 10 uses a power-line switch means 13, which is constituted of a first contact part 14 connected to a battery 11, a second contact part 15 connected to loads 12A to 12X, and a slide part 17 made of a conductive member adapted to slide between these first and second contact parts 14 and 15 so as to connect or disconnect them to or from each other at its connection or disconnection position depending on pressure applied. The power feed to the loads 12A to 12X is controlled through control of the pressure applied to the slide part 17 to hold the total power feed system 10 free from heat by the switch means 13 and reliable in power delivery.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for a vehicle, in which a power supply unit and each load are connected by a power supply line, and a power supply line switching means provided on the power supply line is opened and closed to control each load. The present invention is suitably applied to a vehicle power supply device adapted to appropriately supply power.

[0002]

2. Description of the Related Art FIG. 2 shows a conventional vehicle power supply of this type. In the power supply line switching means 1, an electromagnetic relay 2 is used as the power supply line switching means. That is, in the vehicle power supply device 1, the fusible link 5 and the electromagnetic relay 2 are provided on the power supply line L1 connecting the battery 3 and the load 4, and the switch 6 is controlled by a predetermined control unit (not shown). Is turned on to energize the coil 2A to move the connecting plate 2B in the contact direction, thereby supplying the power of the battery 3 to the load 4.

[0003]

However, in the vehicle power supply device using the electromagnetic relay 2 as described above, since a large amount of heat is generated from the coil 2A, for example, the power supply line L1 having a wire harness configuration is not provided. There is a drawback that heat adversely affects the reliability of connection with the electromagnetic relay 2 and the like. That is, since the wire harness is formed by an electric wire made of a conductive member and an insulating coating layer made of vinyl chloride or the like and covering the electric wire, when the heat of the electromagnetic relay 2 reaches the insulating coating layer, the heat is applied to the electromagnetic relay. The insulating coating layer in the vicinity of 2 is deteriorated, and the reliability of the connection is reduced.

When an abnormal current such as an intermittent short (rare short) flows through the power line L1, unlike the case where the power line L1 is completely short (dead short), the fusible link 5 does not blow, so that the electromagnetic relay Therefore, a large stress is applied as compared with the case where a normal current flows through the second connection plate 2B, and there is a problem that the electromagnetic relay 2 is deteriorated.

The present invention has been made in consideration of the above points, and a vehicle capable of supplying a highly reliable power supply by reducing heat generation and deterioration thereof from a power supply line opening / closing means provided on a power supply line. It proposes a power supply device for use.

[0006]

According to a first aspect of the present invention, there is provided a power supply device for a vehicle, comprising: a power supply unit such as a battery or an alternator; Each of the loads 12A to 12X is connected to the power line L1.
By controlling the opening and closing of the power supply line opening / closing means 13 provided on the power supply line L1.
In the vehicle power supply device 10 adapted to appropriately supply power to the 12X, the first contact portion 14 connected to the power supply portion 11, the second contact portion 15 connected to the loads 12A to 12X, It is a conductive member slidably provided on the first and second contact portions 14 and 15, and brings the first and second contact portions 14 and 15 into a connected state according to the applied pressure. Power line opening / closing means 13 having a sliding portion 17 that slides between a connection position and a blocking position to be in a blocking state;
Pressure generating means 19 for generating a predetermined atmospheric pressure or oil pressure, and pressure applying means 23A, 23 for applying the pressure generated by the pressure generating means 19 to the sliding portion 17 of the power line opening / closing means 13.
B, and control means 24 to 26 for controlling the pressure applied by the pressure applying means 23A and 23B.

In the above configuration, the power line opening / closing means 13
Is performed by the pressure applied to the sliding portion 17 of the power supply line opening / closing means 13, so that there is no heat generation as in the coil of the conventional electromagnetic relay, and the problem due to heat can be avoided. In addition, since the opening / closing operation of the power supply line opening / closing means 13 does not depend on the battery, it can be reliably operated even when the battery voltage drops. Thus,
Power supply with high reliability can be performed.

According to a second aspect of the present invention, there is provided a power supply device for a vehicle, comprising:
A pressure generating unit, such as a piston of an engine or a pressurizing unit for driving an air suspension, mounted on a vehicle in advance is used.

As a result, it is not necessary to newly provide a pressure generating means, so that the operation of claim 1 can be realized with a simple configuration.

According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the vehicle power supply apparatus further stores the pressure generated by the pressure generating means. The pressure tank 22 is provided, and the pressure accumulated in the pressure tank 22 is applied to the sliding portion 17 of the power supply line opening / closing means 13 by the pressure applying means 23B.

As a result, since the pressure necessary for driving the sliding portion 17 is always accumulated in the pressure tank 22, even if the operation of the pressure generating means 19 is stopped, the opening and closing operation of the power supply line opening and closing means 13 is performed. Can be done. Thus, a more reliable power supply can be performed.

According to a fourth aspect of the present invention, there is provided a power supply device for a vehicle according to the present invention, wherein an abnormal current flows through the power supply line L1 in addition to any one of the first to third aspects. Abnormal current detecting means for detecting that the sliding part 17 is in the cut-off position when abnormal current is detected by the abnormal current detecting means. did.

In the above configuration, when an abnormal current due to a rare short circuit or the like of the power supply line L1 flows through the power supply line L1,
This is detected by the abnormal current detection means, and the control means 24
As a result, the power supply line opening / closing means 13 is turned off by the steps 26 to 26 so that no current flows through the power supply line L1. As a result, further deterioration of the power supply line L1 is avoided. Incidentally, if an abnormal current due to a rare short circuit continues to flow through the power supply line L1, the insulating film of the power supply line L1 generates heat and the power supply line L1 is deteriorated.

According to a fifth aspect of the present invention, there is provided a vehicle power supply device comprising: a temperature detecting device for detecting a temperature of a power supply line; Detecting means is provided, and the control means 24 to 26 are adapted to control the pressure so that the sliding portion 17 is at the shut-off position when the temperature detecting means detects a temperature equal to or higher than a predetermined value.

In the above configuration, when an abnormal current due to a rare short circuit or the like of the power supply line L1 flows through the power supply line L1 and the insulating film of the power supply line L1 generates heat, this is detected by the temperature detecting means. When the temperature exceeds a predetermined value, the power supply line opening / closing means 13 is controlled by the control means 24-26.
Is cut off, and no current flows through the power supply line L1. As a result, further deterioration of the power supply line L1 is avoided.

According to a sixth aspect of the present invention, there is provided a vehicle power supply device according to the present invention, wherein the first or second contact portion is further provided in addition to any one of the first to fourth aspects.
4 and 15 are provided with temperature detecting means 27, and the control means 24 to 26 are arranged so that when the temperature detecting means 27 detects a temperature equal to or higher than a predetermined value, the sliding portion 17 is in the shut-off position. The pressure was controlled.

In the above configuration, when an abnormal current flows through the power supply line L1 due to a rare short circuit or the like of the power supply line L1, the temperatures of the first and second contact portions 14, 15 increase. The temperature rise of the first or second contact portion 14, 15 is detected by the temperature detecting means 27, and when the detected temperature becomes equal to or higher than a predetermined value, the power supply line opening / closing means 13 is controlled by the control means 24-26.
Is cut off, and no current flows through the power supply line L1. As a result, further deterioration of the power supply line L1 is avoided. Further, since the temperature of the first or second contact portion 14 or 15 is detected, the temperature detection area can be smaller than that in the case where the temperature of the power supply line L1 is detected, and the configuration can be simplified. Can be

According to a seventh aspect of the present invention, there is provided a power supply device for a vehicle, wherein a temperature fuse is used as the temperature detecting means.

As a result, the control means 24 to 26 can easily detect the presence or absence of the blow of the thermal fuse 27 and easily carry out the power supply line L.
1 can detect whether an abnormal current caused by a rare short circuit or the like is flowing.

According to a further aspect of the present invention, there is provided a power supply device for a vehicle, comprising: a collision detecting means for detecting a collision of a vehicle; The control means 24 to 26 control the pressure so that when the collision detection means 28 detects a collision, the sliding portion 17 is in the blocking position.

In the above configuration, power supply to the loads 12A to 12X can be stopped by setting the power supply line opening / closing means 13 to an open state with almost no current flow at the time of a vehicle collision.
The ignition by the leaked gasoline can be effectively avoided.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 10 denotes a vehicle power supply device as a whole, which includes a battery 11 and loads 12A to 12X.
A power line opening / closing means 13 for appropriately supplying power to the loads 12A to 12X by setting the power line L1 in a closed state or an open state is provided on the power line L1 connecting the power lines L1 and L2.

The power line opening / closing means 13 has a first contact portion 14 connected to the battery 11 and a second contact portion 15 connected to the load 12. First and second contact portions 1
Reference numerals 4 and 15 are both annular conductive members, and are fixed in the pressure introducing pipe 16 at a predetermined interval.

The power line opening / closing means 13 includes first and second power lines.
And a sliding portion 17 made of a cylindrical conductive member that slides in the center holes of the contact portions 14 and 15. The sliding portion 17 is connected to the first and second contact portions 14 and 15 as shown in the drawing according to the pressure applied to the pressure introducing pipe 16 and is connected to the first and second contact portions 14 and 15 as shown in FIG. Sliding between position. In this embodiment, when a negative pressure is applied to the pressure introducing pipe 16, the sliding portion 17 slides in the direction of arrow a, and the first and second contact portions 14, 15 are opened. (Interrupted state).

Here, in the power supply device 10 for a vehicle, the piston 19 of the engine 18 is used as a pressure generating means for generating a negative pressure applied in the pressure introducing pipe 16. That is, in a vehicle, the piston 19 is generally used.
The negative pressure is generated by the vertical movement of the throttle valve and the throttle valve 20, so that the negative pressure is used effectively in the vehicle power supply device 10.

The vehicle power supply device 10 connects the negative pressure outlet pipe 21 provided as an additional component and the negative pressure tank 22 with a drain hose 23A, and once supplies the negative pressure generated by the piston 19 to the negative pressure tank 22. accumulate. Here, in the case of the embodiment, a master bag generally mounted on a vehicle is used as the negative pressure tank 22 so that the brake can be operated several times even when the engine 18 is stopped.

As described above, in the power supply device 10 for a vehicle, the pressure necessary for driving the sliding portion 17 is always stored in the negative pressure tank 22. Will no longer occur,
The power supply line switching means 13 can be opened and closed.

The negative pressure tank 22 is connected to a valve 24 via a drain hose 23B as a pressure applying means. The valve 24 is driven to open and close by a solenoid 25. That is, when the control unit 26 turns on the transistor Tr to flow a current through the solenoid 25, the valve 24 opens. On the other hand, when the control unit 26 turns off the transistor Tr and no current flows through the solenoid 25, the valve 2 opens.
4 is closed.

Here, a temperature fuse 27 is attached to the second contact portion 15 as temperature detecting means. The thermal fuse 27 has a fusing characteristic such that when a rare short circuit or the like occurs in the power supply line L1 and the temperature of the second contact portion 15 rises, the second fuse 15 is effectively blown.

The control unit 26 detects the presence or absence of a disconnection of the thermal fuse 27 based on the current flowing through the thermal fuse 27,
When the disconnection of the thermal fuse 27 is detected, the transistor Tr is turned on to open the valve 24. Control unit 2
An acceleration signal from an acceleration sensor 28 serving as a collision detecting means is input to 6, and when an acceleration signal indicating a collision is input, the transistor Tr is turned on to open the valve 24.

In the above configuration, when the power supply line L1 is damaged and a dead short or a rare short occurs with the body of the vehicle, the temperature of the second contact portion 15 increases. At this time, the temperature of the thermal fuse 27 also rises with the rise of the temperature of the second contact portion 15, and when the temperature reaches a temperature corresponding to a rare short-circuit, the thermal fuse 27 is blown.

When the control unit 26 detects that the thermal fuse 27 has blown, it turns on the transistor Tr to activate the solenoid 25 and open the valve 24. When the valve 24 is opened, a negative pressure is applied to the pressure introducing pipe 16, whereby the sliding portion 17 is drawn from the connection position shown in the drawing to the cutoff position shown by the arrow a.

As a result, the first contact portion 14 and the second contact portion 15 become non-conductive, the power supply to the loads 12A to 12X is cut off, and the power line L1 further deteriorates due to a rare short circuit or the like. Is avoided.

When an acceleration signal indicating a collision is input, the control unit 26 opens the valve 24 to make the first contact part 14 and the second contact part 15 non-conductive so that the loads 12A-1
By shutting off the power supply to the 2X, the ignition of the leaked gasoline can be effectively avoided at the time of a vehicle collision.

Thus, according to the above configuration, the power line opening / closing means 13 is connected to the first contact portion 1 connected to the battery 11.
4 and second contact portion 1 connected to loads 12A to 12X
5 and a conductive member slidably provided on the first and second contact portions 14 and 15 to connect the first and second contact portions 14 and 15 in accordance with the applied pressure. The power supply to the loads 12 </ b> A to 12 </ b> X is controlled by controlling the pressure applied to the sliding portion 17. By controlling the supply, the power line switching means 1
The vehicle power supply device 10 which does not generate heat from the power supply 3 and can supply highly reliable power can be realized.

Since the piston 19 of the engine 18 is used as the pressure generating means, it is not necessary to newly provide a pressure generating means, so that the power supply line opening / closing means 13 can be favorably operated with a simple configuration. become.

Further, the negative pressure tank 22 is provided and the sliding portion 17 is always provided.
By accumulating the pressure necessary to drive the power supply, the power line opening / closing means 13 can be opened / closed even when the engine 18 is stopped, and a more reliable power supply is performed. Will be able to do it.

Further, the temperature fuse 27 and the acceleration sensor 2
8 to detect whether or not a rare short circuit or the like has occurred in the power line L1 and to detect a collision of the vehicle, and to control the opening of the power line opening / closing means 13 when the rare short circuit or the collision is detected. By stopping the power supply to the loads 12A to 12X, it is possible to realize the vehicle power supply device 10 capable of preventing the further deterioration of the power supply line L1 and the vehicle fire upon collision.

In the above-described embodiment, the case where the piston 19 of the engine 18 is used as the pressure generating means and the sliding portion 17 is driven by the negative pressure generated by the piston 19 has been described. It is also possible to use a device that generates a positive pressure, such as an air suspension driving pressurizing unit, and drive the sliding unit 17 by the positive pressure. Further, the sliding portion 17 may be driven by hydraulic pressure.

In the above-described embodiment, the case where the temperature fuse 27 is used as the temperature detecting means for detecting the temperature of the second contact portion 15 has been described. However, the present invention is not limited to this. For example, a thermistor or the like may be used, and any device that can detect the temperature may be used. In the above embodiment,
Although the case where the temperature of the second contact portion 15 is detected has been described, the same effect as that described above can be obtained by detecting the temperature of the first contact portion 14, and the temperature of the power supply line L1 can be further reduced. A power supply line abnormality such as a rare short may be detected by detection.

The present invention further relates to the first or second contact portion 1.
This is not limited to the case where the temperature of the power supply line L1 is detected by detecting the temperature of the power supply line L4, 15 or the power supply line L1. Even if a means is provided and the power supply line opening / closing means 13 is controlled to open and close in accordance with the detection result, further deterioration of the power supply line L1 can be prevented as in the case described above. In this case, for example, a Hall element or a magnetic element may be provided near the power supply line L1 as the abnormal current detecting means, and the control unit 26 may monitor the electromotive force generated from these elements.

[0043]

As described above, according to the present invention, there is provided a power supply apparatus for a vehicle which is adapted to supply power appropriately to each load by opening and closing a power line opening / closing means provided on a power line. The power line opening / closing means includes a first contact portion connected to a battery, a second contact portion connected to a load, and a conductive member slidably provided on the first and second contact portions. And a sliding portion that slides between a connection position where the first and second contact portions are connected to each other and a blocking position where the first and second contact portions are disconnected according to the applied pressure,
By controlling the pressure applied to the sliding portion to control the supply of power to the load, there is no heat from the power supply line opening / closing means, and a highly reliable power supply can be performed. Power supply device can be realized.

[Brief description of the drawings]

FIG. 1 is a schematic connection diagram illustrating a configuration of a vehicle power supply device according to the present invention.

FIG. 2 is a schematic connection diagram illustrating a configuration of a conventional vehicle power supply device.

[Explanation of symbols]

Reference Signs List 10 Vehicle power supply device 11 Battery (power supply unit) 12A to 12X Load 13 Power supply line opening / closing means 14 First contact part 15 Second contact part 17 Sliding Unit 18 Engine 19 Piston (pressure generating means) 22 Negative pressure tank (pressure tank) 23A, 23B Drain hose (pressure applying means) 24 Valve (control means) 25 Solenoid (control) Means) 26 Control part (Control means) 27 Thermal fuse (Temperature detecting means) 28 Acceleration sensor (Collision detecting means)

Claims (8)

[Claims] A power supply unit such as a battery or an alternator and each load are connected by a power supply line, and a power supply line opening / closing means provided on the power supply line is controlled to open and close so that power is appropriately supplied to each load. A first contact portion connected to the power supply portion, a second contact portion connected to the load, and slidable on the first and second contact portions. And a sliding portion that slides between a connection position where the first and second contact portions are connected and a blocking position where the first and second contact portions are disconnected according to the applied pressure. A power supply line opening / closing unit having a predetermined pressure or a hydraulic pressure; a pressure application unit configured to apply a pressure generated by the pressure generation unit to the sliding portion of the power supply line opening / closing unit; The pressure applying means applies The vehicle power supply apparatus characterized by comprising a control means for controlling the force. 2. The pressure generating unit according to claim 1, wherein a pressure generating unit mounted on a vehicle in advance, such as an engine piston or an air suspension driving pressurizing unit, is used as the pressure generating unit. Power supply for vehicles. 3. A pressure tank for accumulating pressure generated by said pressure generating means, wherein said pressure applying means applies the pressure accumulated in said pressure tank to said sliding portion of said power line opening / closing means. The power supply device for a vehicle according to claim 1 or 2, wherein: 4. An abnormal current detecting means for detecting that an abnormal current is flowing in the power supply line, wherein the control means is configured to: when the abnormal current is detected by the abnormal current detecting means, The power supply device for a vehicle according to any one of claims 1 to 3, wherein the pressure is controlled so as to be in the shutoff position. 5. A temperature detecting device for detecting a temperature of the power supply line, wherein the control portion sets the sliding portion to the cutoff position when a temperature equal to or higher than a predetermined value is detected by the temperature detecting device. The power supply device for a vehicle according to any one of claims 1 to 4, wherein the pressure is controlled as described above. 6. A temperature detecting device for detecting a temperature of the first or second contact portion, wherein the control device is configured to detect the temperature of the sliding portion when the temperature detecting device detects a temperature equal to or higher than a predetermined value. The power supply device for a vehicle according to any one of claims 1 to 4, wherein the pressure is controlled such that the pressure reaches the shut-off position. 7. The power supply device for a vehicle according to claim 6, wherein said temperature detecting means is a thermal fuse. 8. A collision detecting means for detecting a collision of the vehicle, wherein the control means controls the pressure so that the sliding portion is in the blocking position when the collision is detected by the collision detecting means. The power supply device for a vehicle according to any one of claims 1 to 3, wherein: