JPH0923589A - Auxiliary power supply for accessory - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically control a plurality of accessory circuits in an auxiliary power supply. SOLUTION: An auxiliary power supply 1 for accessory is connected to a mobile battery 3 via a cigarette lighter socket 2. A control unit 4 of the auxiliary power supply 1 is provided with an intermittent control means by means of a voltage supervisory circuit. This intermittent control means compares a battery voltage with the preset value to cut off an accessory circuit in the sequence of a third accessory circuit 7, a second accessory circuit 6 and a first accessory circuit 5 in order to realize automatic reset with elimination of the cause of cut-off condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary power supply device for a vehicle accessory.

[0002]

2. Description of the Related Art An auxiliary power supply device for an accessory, which has a plurality of accessory circuits and is used by connecting to an on-vehicle battery through a vehicle cigarette lighter socket, is known.

This auxiliary power supply for accessories is provided with a battery level meter to prevent the battery from running out, and the accessory is used while checking the level meter.

Further, when the power consumption exceeds a set value, the fuse is short-circuited to protect the battery and the harness.

[0005]

However, the conventional one is troublesome because the level meter must be constantly monitored when the accessory is used. Further, if the fuse is short-circuited, all the accessories cannot be used all at once, which is inconvenient. The present invention solves such a problem.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 is an auxiliary power supply device for an accessory, which comprises a plurality of accessory circuits for connecting an accessory, and which is an on-vehicle battery. It is characterized by further comprising: an interruption control means for connecting and disconnecting the accessory circuit in a predetermined order by comparing the voltage of 1 to a predetermined set value.

According to a second aspect of the present invention, in an accessory auxiliary power supply device that is equipped with a plurality of accessory circuits for connecting accessories and is connected to an in-vehicle battery, the total power consumption of the accessory circuits is set to a preset value. It is characterized in that it is provided with an interruption control means for interrupting the accessory circuits in a predetermined order by comparison.

[0008]

1 is a block diagram of an accessory auxiliary power supply device, which is connected to an on-vehicle battery 3 via a cigarette lighter socket 2 provided in a vehicle. A control unit 4 and a plurality (three in this example) of first to third accessory circuits 5, 6, 7 are provided.

The first to third accessory circuits 5, 6, and 7 are respectively provided with relays 8, 9, 10 and first, second, and third relays.
Accessory sockets 11, 12, 13 are provided.

The first accessory socket 11, which is one of the accessory sockets, is a dedicated cigarette lighter socket on the auxiliary power supply 1 side.

The first to third accessory circuits 5, 6, and 7 are given priorities of interruption, and the third accessory socket 1
3, the second accessory socket 12, and the first accessory socket 11 are shut off in this order.

Further, the first to third accessory circuits 5,
An indicator 14 having an indicator lamp is provided in the control unit 4 to display the intermittent state of 6 and 7.

The control unit 4 is composed of a microcomputer and compares the preset value with a preset value to intermittently connect and disconnect the relays 8, 9 and 10.
It has a built-in intermittent control means for disconnecting or connecting each accessory circuit.

There are two types of on / off control means, one for controlling based on the voltage of the on-vehicle battery by the voltage monitoring circuit and one for controlling based on the total power consumption by the current monitoring circuit.

FIG. 2 is a flow chart showing the intermittent control of the first to third accessory circuits 5, 6, and 7 by the intermittent control means using the voltage monitoring circuit in the control unit 4.

In this figure, when a switch common to each circuit provided in the accessory auxiliary power supply device 1 is turned on (S1), if the battery voltage V1 detected with the circuit connected is below a set value. (S2), the intermittent control means opens the relay 10 to shut off the third accessory circuit 7 (S3).

If the changed battery voltage V2 still does not return to the set value and remains below the set value (S4), the relay 9 is further opened to shut off the second accessory circuit 6 (S5).

As a result, the battery voltage V3 after change is also changed.
If is still less than or equal to the set value (S6), the relay 8 is opened to shut off the first accessory circuit 5, and eventually all circuits detected in the state where the circuits are connected are shut off (S7).

After that, when the battery voltage V4 is recovered to be equal to or higher than the set value (S8), the relay 8 is closed to return all the accessory circuits to the energized state (S9), and the process is repeated from S2.

If the battery voltage V1 is higher than the set value, all accessory circuits are turned on (S2). Similarly, if the battery voltage V2 is higher than the set value, the first and second accessory circuits 5 and 6 are connected. Keeps energized (S
4).

If the battery voltage V3 is higher than the set value, only the first accessory circuit 5 is energized (S
6).

As described above, when the intermittent control means using the voltage monitoring circuit is used, the level meter is released from the constant monitoring, which improves the usability.

Further, it is convenient because the system is automatically shut down according to the priority order and automatically recovers if the cause disappears even after the shutoff.

Further, since the cigar lighter circuit is designed to be energized with the highest priority, even if it is connected to the vehicle cigar lighter socket, the cigar lighter can be used as little as possible.

FIG. 3 is a flow chart showing the intermittent control based on the total power consumption of the first to third accessory circuits 5, 6, 7 by the continuous control means using the current monitoring circuit.

When a switch common to all accessory circuits is turned on (S10), the auxiliary power supply current A1 corresponding to the total power consumption detected in the connection state of all accessory circuits is compared with a preset set value, and If it becomes above, the 3rd accessory circuit 7 will be cut off (S11).

If the changed auxiliary power supply current A2 is greater than or equal to the set value (S13), the second accessory circuit 6 is cut off (S13).
14) As a result, if the changed auxiliary power supply current A3 remains equal to or higher than the set value (S15), the first accessory circuit 5 is cut off and all circuits are cut off (S16).

Auxiliary power supply current A4 by the subsequent check
If is restored to the set value or less (S17), all the accessory circuits 5 are returned to the energized state (S18), and thereafter the control is repeated from S11.

When A1 is smaller than the set value, all circuits are energized (S11). Similarly, when A2 is smaller than the set value, the first and second accessory circuits 5 and 6 are energized (S11). S13), if A3 is smaller than the set value, only the first accessory circuit 5 is energized (S1
5).

As described above, according to the continuation control means using the current monitoring circuit, unlike the interruption by the fuse, all accessory circuits are not interrupted all at once, but are interrupted according to the priority order, and even after interruption, the cause is It is convenient because if it disappears, it will be automatically restored.

Moreover, since the interruption or the energization is controlled based on the total power consumption of the auxiliary power supply device 1, the vehicle-mounted battery 3
Not only can the harness and the auxiliary power supply 1 be protected.

The invention of the present application is not limited to the above-described embodiment, but can be variously applied. For example, the accessory circuit provided in the auxiliary power supply device can be any number of 2 or 4 or more.

[0033]

According to the first aspect of the present invention, in the accessory auxiliary power supply device, the intermittent control means for connecting and disconnecting the accessory circuit in the predetermined order by comparing the voltage of the on-vehicle battery with the predetermined set value. Since the intermittent control means using the voltage monitoring circuit is provided, it is not necessary to constantly monitor the level meter, which improves usability.

Further, it is convenient because the system is automatically shut down according to the priority order, and is automatically restored if the cause disappears even after the shutoff.

Further, according to the second aspect of the present invention, the accessory power supply device for the accessory is connected to the accessory circuit in a predetermined order by comparing the total power consumption of the entire accessory circuit with a predetermined set value. Since the on-off control means is provided, in addition to the above effects, all accessory circuits are convenient because they are not interrupted all at once unlike the conventional interruption by a fuse.

Moreover, since the interruption or energization is controlled based on the total power consumption of the auxiliary power supply device, not only the on-vehicle battery but also the harness and the auxiliary power supply device can be protected.

[Brief description of drawings]

FIG. 1 is a block diagram of an auxiliary power supply device.

FIG. 2 is a flowchart showing intermittent control using a voltage monitoring circuit.

FIG. 3 is a flowchart showing intermittent control based on total power consumption.

[Explanation of symbols]

1: auxiliary power supply device, 2: vehicle-side cigarette lighter socket, 3: vehicle-mounted battery, 4: control unit,
5: first accessory circuit, 6: second accessory circuit,
7: Third accessory circuit, 8: Relay, 9: Relay, 1
0: relay, 11: first accessory socket (for cigarette lighter only), 12: second accessory socket, 13: third accessory socket

Claims (2)

[Claims] 1. In an accessory auxiliary power supply device that is provided with a plurality of accessory circuits for connecting an accessory and is connected to an in-vehicle battery, the voltage of the in-vehicle battery is compared with a predetermined set value in a predetermined order. An auxiliary power supply device for an accessory, comprising an intermittent control means for connecting and disconnecting the accessory circuit. 2. In an accessory auxiliary power supply device which is provided with a plurality of accessory circuits for connecting an accessory and which is connected to a vehicle-mounted battery, the total power consumption of the entire accessory circuit is predetermined by comparing it with a predetermined set value. An auxiliary power supply device for an accessory, comprising an on / off control means for connecting / disconnecting the accessory circuit in the order in which they are provided.