JP2001069673A - Power supply for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To omit a harness for connection between a fuse relay box and a battery by placing an electric circuit unit at the upper part of a battery fixing means and connecting only the positive-pole terminal of the battery to the electric circuit unit. SOLUTION: To secure a battery 123 on a vehicle body, a frame 118 is put over the top of the battery 123, and the battery is installed on the vehicle body with stays 121 and 122 and tightened with nuts 119 and 120. A fuse relay box 103 of an electric circuit units fastened to and secured on the upper part of the frame 118 as a battery fixing means by a means such as an adhesive. A booster cable is connected only to the positive-pole terminal of the battery 123, and an insulating protective cover 107 is secured detachably on the fuse relay box 103 so as to cover the positive-pole terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a power supply device for supplying power to an electric load of an automobile, and more particularly to a structure of a fuse relay box which is mounted on a battery in a stacked manner.

[0002]

2. Description of the Related Art A vehicle electrical load (for example, a headlamp or a starter motor) receives power from a battery or an alternator of a vehicle, and power supply to the load and power cutoff are controlled by a relay and a semiconductor switching element. . Further, a fuse is usually provided between the battery and the load in order to prevent the electric wire from being overheated due to the short circuit failure of the electric load or the short circuit accident of the vehicle wiring. Relays and fuses are mounted together in a fuse / relay box, and the fuse / relay box is usually installed near a battery.

In order to reduce the size of the fuse / relay box, Japanese Patent Application Laid-Open No. H10-264740 discloses a configuration in which a housing surrounding a battery and a fuse / relay box are integrally formed to reduce the size of the fuse / relay box. Suggest a way. Further, a battery reverse connection prevention structure for preventing the destruction of the electronic device when the battery is reverse connected is also proposed.

[0004]

In the above-mentioned invention, since the battery and the fuse / relay box are integrated, the engine is started by supplying power from outside the vehicle when the battery is discharged due to forgetting to turn off the electric load. There is a lack of consideration for jumper start to make the jumper start impossible.

[0005] Further, even in the same vehicle type, the battery size may be different due to a difference in cold district specifications and destinations (Japan and the United States, etc.). Had to set a fuse and relay box.

SUMMARY OF THE INVENTION It is, therefore, an object of the present invention to provide a fuse relay box which is mounted on a vehicle battery in a stacked manner. The fuse relay box can be jumpered and can be configured independently of the size of the battery. It is an object of the present invention to provide a possible vehicle power supply device.

[0007]

SUMMARY OF THE INVENTION A stay for mounting a battery on a vehicle body is screwed to a frame mounted on the upper portion of the battery, and a fuse / relay box is fixed to the frame. By preparing a frame for each battery size and combining standardized fuse relay boxes, a fuse relay box independent of the battery size can be constructed.

The electrical connection between the battery and the fuse / relay box is configured as follows. A bolt and nut type terminal is fixed to the battery (+) terminal in advance, and a stud bolt is provided at a portion opposite to the bolt and nut type terminal. Fasten line tabs together. A bolt and nut type terminal is fixed to the battery (-) terminal in advance, and a stud bolt is provided at the opposite portion of the bolt and nut type terminal, and a ground wire tab is fastened to the stud bolt together. The battery (+) terminal is insulated from the body by an insulating protective cover fixed to the fuse / relay box housing.

At the time of jumper start, by removing the protection battery (+) terminal member, it becomes possible to connect a booster cable to the battery (+) terminal.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a bird's-eye view of the structure of the vehicle power supply device of the present invention. The battery 123 has a (+) terminal 124 and a (−) terminal 125. In order to fix the battery 123 to a vehicle body (not shown), the frame 118 is covered from above the battery 123 and the stays 121 and 1 are fixed.
Attach it to the vehicle body at 22 and tighten with nuts 119 and 120. The battery 123 has a terminal 1 on the (+) terminal side.
08 and the terminal 113 are fixed to the (-) terminal side, respectively. The terminal 108 has a bolt 109 and a nut 1
The terminal 113 is fixed by tightening the bolt 114 and the nut 115. Terminal 108
The power supply line 112 to the starter motor and the fuse
A stud bolt for fixing a bus bar (described in FIG. 2) inside the relay box is provided, and after passing the power supply line and the bus bar through the stud bolt,
Fastened and fixed by a nut 111. Terminal 122
Is provided with a stud bolt for fixing the ground wire 117, and after passing the ground wire through the stud bolt, is fastened and fixed by the nut 116.

The fuse / relay box 103 is fixed to the frame 118. As the fixing method, a snap fit or an adhesive can be used, but other fixing methods may be used. An insulation protection cover 107 that is detachably fixed to the fuse / relay box 103 is provided to maintain insulation between the battery (+) terminal and the body (vehicle body). At the time of jumper start, remove the cover and connect the booster cable to the battery (+) terminal. In the present embodiment, fuses 104a, 104b, 104
c, 104d, 104e and relays 102a, 102
b and 102c are mounted. Vehicle harnesses 1050 and 1 connected to fuse / relay box 103
051 is connected via connectors 105a and 105b, respectively. In this embodiment, the connector is set on the opposite side of the battery terminal, but the location of the connector is not particularly limited. A cover 101 for physically protecting the relay and the fuse is attached to the fuse / relay box 103.

FIG. 2 shows the fuse / relay box 1 shown in FIG.
03 shows a cross-sectional view. The detailed structure of the fuse / relay box 103 will be described with reference to FIG.

The cover 201 is provided to protect the fuse 204 and the relays 202 and 203.
The fuse / relay box 103 has a vertically divided structure, and includes an upper case 205 and a lower case 206. The lower case 206 also serves as a housing for a connector on the vehicle harness side, and connector terminals 216 and 218 protrude. Relay 2
02, 203 and the terminal of the fuse 204 are female-female terminals 2071, 2081, 209, 210, respectively.
211 and 212 are connected to the metal fret 214. The connector terminals 216 and 218
A metal fret is formed in the fuse / relay box. In this embodiment, the insulating members 213, 215, and 21 are provided.
7 has a three-layer structure. One of the metal frets is connected to a battery (+) terminal 228 as a power feeding metal fret 220. The connection of the metal frets in each layer follows the internal circuit of the fuse / relay box (described in FIG. 3). This configuration is common to junction boxes using metal frets.

A terminal 230 fixed to the (+) terminal 228 of the battery 229 is connected to the power supply metal fret 220.
And the starter power supply line 225 are fastened and fixed. The starter power supply line 225 is connected to the stud bolt of the terminal 230.
Is fixed with a nut 223, and the power supply metal fret 220 is further fixed with a nut 221 and a washer 222.

A fuse / relay box lower case 206 is mounted on a frame 227 for fixing the battery 229 to the vehicle body.
Is fixed. The cover 219 has a structure that can be detached when the jumper starts.

FIG. 3 shows an example of the internal circuit configuration of the fuse / relay box of this embodiment. The fuse / relay box 301 includes connectors 302 and 3 for the vehicle harness.
03 is provided. The connector 302 is connected to the relay 30
The switch side (ie, load connection side) lines of 9 and 310 are connected. Fuses 304 and 305 are provided for each of the relay systems, respectively, to realize harness protection in the event of a load short circuit and a ground fault. Applications for such relays include ignition relays, starter relays,
There are accessory relays. Also, the coil control signal of the relay 309 or 310 is similarly connected to the connector 302. The connector 303 is connected to a line on the switch side (that is, a load connection side) of the relay 311 and a line (non-switch power supply line) that is always supplied with power through the fuses 307 and 308. A fuse 306 is provided downstream of the relay 311 to realize harness protection in the event of a load short circuit and a ground fault. Applications of the non-switch power supply line include, for example, a memory backup power supply of a control unit and radio station selection data.
The coil control signal of the relay 311 is also connected to the connector 303 in the same manner. The power supply side line of the relay and the non-switch power supply line are collectively connected to the (+) terminal 313 of the battery 312, and the power is supplied collectively. Apart from the above, the (+) terminal 313 of the battery 312
, And a ground line 316 is independently connected to a (−) terminal 314 of the battery 312. This is because the inrush current and the steady current of the starter are excessively large compared to other electric loads, and there is no appropriate overcurrent cutoff element.

As described above, according to the present invention, the fuse
Since the harness connecting the relay box and the battery can be omitted, and the relay box can be installed on the battery, a compact and space-saving design can be achieved.

[0018]

As described above, according to the present invention,
The harness connecting the fuse / relay box and the battery can be omitted, and the relay box installation space can be saved. Further, it is expected that a fuse / relay box which can perform a jumper start and does not depend on the size of the battery can be realized.

[Brief description of the drawings]

FIG. 1 is a structural overhead view of a vehicle power supply device according to the present invention.

FIG. 2 is a sectional view of a fuse / relay box according to the present invention.

FIG. 3 is an internal circuit configuration diagram of a fuse / relay box according to the present invention.

[Explanation of symbols]

101: cover, 102a: relay, 103: fuse / relay box, 104a: fuse, 105a: connector, 107: insulating protective cover, 108: terminal, 10
9 bolts, 110 nuts, 111 nuts, 112
... power supply line, 118 ... frame, 119 ... nut, 1
21: stay, 123: battery, 124: battery terminal.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) F02N 11/08 F02N 11/08 L H02G 3/16 H02G 3/16 Z

Claims (2)

[Claims] 1. A power supply device for supplying power to an electric load of an automobile, wherein a battery fixing means for fixing a battery to a vehicle body and an electric circuit unit having a fuse and a power supply relay are integrated and separable. A power supply device for a vehicle, wherein the electric circuit unit is arranged above the battery fixing means, and only a positive terminal of a battery is connected to the electric circuit unit. 2. The power supply device for a vehicle according to claim 1, wherein a connection terminal is attached to a battery positive terminal, and a power supply line for supplying power to a starter motor and the power supply to the electric circuit unit are connected to the connection terminal. And the vehicle body short-circuit protection insulating means at the portion having the positive potential including the connection terminal is provided, and the vehicle body short-circuit protection insulating means is detachable. A power supply device for a vehicle, wherein a protective insulating means is removed to execute a jumper start.