JP2011024402A - On-vehicle power supply apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle power supply apparatus which efficiently charges an exclusive system battery through combinational use of generation by a solar panel and generation by a travelling vehicle so as to supply stable power to an external load other than the vehicle. <P>SOLUTION: The on-vehicle power supply apparatus includes a solar panel mounted on the vehicle, an exclusive system battery, a system controller controlling the charging of the battery from the solar panel, and a travelling charge control circuit for controlling the charging of the exclusive system battery from a vehicle alternator. Both a first charge circuit including the solar panel and a second charge circuit including the alternator and travelling charge control circuit are preferably connected in parallel with the exclusive system battery. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an in-vehicle power supply device for using an electrical load on or near a vehicle.

  Conventionally, for example, in highway construction or accident display vehicles, if the vehicle's own battery is used as the power source of the display device, the engine must always be started, and the battery capacity is limited. There was a point. In addition, when a dedicated battery is used separately from the vehicle battery, it is necessary to always know the state of charge, and there is a problem that if the battery is used up, it cannot be used any more. Further, when a dedicated generator is used for a display device, there is a problem that the generator itself is large and cannot be applied to a small vehicle.

  On the other hand, a method for charging a battery with power generated by a solar panel is already known, and several methods have been proposed for vehicles as well as a method for directly using power generated by a solar panel.

  For example, Patent Document 1 discloses a system in which a solar panel is installed on the roof of a vehicle and the vehicle battery is charged with power generated by the solar panel. However, the present invention is mainly intended to supplementarily charge a battery of a vehicle using an electric motor such as a hybrid vehicle, and is not intended to use a load other than the vehicle.

  Patent Document 2 discloses a technique for directly driving a ventilation fan by power generation of a solar panel provided on the roof of a vehicle. In this technique, charging is not intended and a battery is not used, so that the ventilation fan is driven by the weather.

  Further, Patent Document 3 discloses a technique for driving a fuel cell device using power generation by a solar panel. This technique also shows a means for charging the battery with the power generated by the solar panel, but this is only for the purpose of supplying auxiliary power for driving the fuel cell device, and for the external load it is a fuel. Batteries are the only source of power.

JP 2009-506742 A JP 2004-82948 A JP 2001-35503 A

  The present invention has been made in view of the above problems, and in order to supply stable power to an external load other than the vehicle, the power generation by the solar panel and the power generation by the running vehicle are used in combination. It is an object of the present invention to provide an in-vehicle power supply device that can efficiently charge a system-dedicated battery.

  In order to solve the above problems, an in-vehicle power supply device according to the present invention includes a solar panel installed in a vehicle, a system-dedicated battery, a system controller that controls charging from the solar panel to the battery, and an alternator of the vehicle. It is characterized by comprising a running charge control circuit for controlling charging to the system dedicated battery.

  The solar panel, the first charging circuit including the system controller, and the alternator and the second charging circuit including the driving charge control circuit are preferably connected in parallel to the system dedicated battery.

  In addition, it is preferable that the running-time charging control circuit has a function of turning on / off charging of the system-dedicated battery from the alternator.

  Further, the running charge control circuit includes at least a timer, a diode, a relay, and a switch, and has a function of turning on the charging circuit for the system-dedicated battery after a predetermined time from when the vehicle starter switch is turned on. More preferably.

  In the in-vehicle power supply device according to the present invention, the system dedicated battery can be charged by using both the power generation by the solar panel and the power generation by the alternator while the vehicle is running. It is possible to maintain. In particular, in the case of a display vehicle such as construction, it is necessary to travel a certain distance in order to travel from the base to the construction site. If necessary, charging using a commercial AC power supply is also possible, so that reliability as a power supply can be improved. Further, in the in-vehicle power supply device according to the present invention, since a timer is used as a circuit for supplying the power generated by the alternator of the vehicle to the system-dedicated battery, a complicated circuit and expensive parts are unnecessary, and the control circuit Can be manufactured at low cost.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The configuration of the in-vehicle power supply device according to the present invention is shown in FIG. As shown in FIG. 1, in the present invention, a system-dedicated battery is connected to a first charging circuit including a solar panel and a system controller. The system controller controls charging of the power from the solar panel to the dedicated battery, and also controls the system dedicated battery not to be overcharged. This solar panel can be installed on the roof of the vehicle or on the rear cargo bed if necessary. This solar panel can be selected from commercially available products according to performance and size. The system dedicated battery is also connected to the second charging circuit on the other hand. The second charging circuit includes an alternator for charging a vehicle battery included in a normal vehicle, a driving charge control circuit, and a vehicle battery. The driving charge control circuit controls on / off charging of the system dedicated battery. can do. As the system controller, a commercially available solar panel can be used.

  With the above-described configuration, the on-vehicle power supply device according to the present invention can always charge the system-dedicated battery by the solar panel during the daytime with sunlight regardless of whether the vehicle is running or stopped. On the other hand, the traveling charge control circuit turns on the route to the system-dedicated battery after a certain time from when the vehicle starter switch is turned on. Thereby, in the case of normal driving during the day, the system-dedicated battery is charged.

  FIG. 2 shows an embodiment of the traveling charge control circuit. One terminal of the timer 2 (for example, DC 24V) of this circuit is connected to the ignition terminal 1 of the vehicle, and the other terminal is connected to the relay 3 (for example, DC 24V). This relay is connected to the electromagnetic switch 4 (for example, DC24V, 250A). One terminal of the electromagnetic switch 4 is connected to the alternator 6 of the vehicle, and the other terminal is connected to the terminal 5 of the system dedicated battery. With this configuration, when the starter switch of the vehicle is turned on, the timer 2 is started, and the relay 3 is turned on after a predetermined time. As a result, the electromagnetic switch 4 is closed, and charging from the alternator 6 to the system dedicated battery 5 becomes possible. In this circuit, the timer was used because when the vehicle starter switch was turned on, if the charging circuit for the system dedicated battery was connected, the alternator was overloaded, so the time was delayed to the vehicle battery. This is because the charging of the system-dedicated battery is started after the charging current decreases. The set time of the timer is preferably 3 to 5 minutes. It is to be noted that this traveling charge control circuit is merely an example, and it goes without saying that many modifications can be made without departing from the spirit of the present invention.

  Although not specifically shown in the above embodiment, it is of course possible to connect charging means from a commercial AC 100V outlet to the system controller.

  As described above, the on-vehicle power supply device according to the present invention can charge the system-dedicated battery using both the power generation by the solar panel and the power generation by the alternator while the vehicle is running. It is possible to maintain the level stably. In particular, in the case of a display vehicle such as construction, it is necessary to travel a certain distance in order to travel from the base to the construction site. Further, in the in-vehicle power supply device according to the present invention, since a timer is used as a circuit for supplying the power generated by the alternator of the vehicle to the system-dedicated battery, a complicated circuit and expensive parts are unnecessary, and the control circuit Can be manufactured at low cost.

It is explanatory drawing which shows the structure of the vehicle-mounted power supply device by this invention. It is a circuit diagram which shows the Example of the charging control circuit at the time of driving | running | working used for the vehicle-mounted power supply device by this invention.

1 Starter Switch 2 Timer 3 Relay 4 Electromagnetic Switch 5 Battery Terminal for System 6 Alternator 7 Battery for Vehicle

Claims (4)

A solar panel installed in a vehicle; a system-dedicated battery; a system controller that controls charging from the solar panel to the battery; and a running charge control circuit that controls charging from the alternator of the vehicle to the system-dedicated battery; An in-vehicle power supply device comprising: The solar panel, a first charging circuit including the system controller, and an alternator and a second charging circuit including the driving charge control circuit are connected in parallel to the system dedicated battery. The in-vehicle power supply device according to claim 1. The on-vehicle power supply device according to claim 1, wherein the running charge control circuit has a function of turning on / off charging of the system-dedicated battery from the alternator. The driving charge control circuit comprises at least a timer, a diode, a relay, and a switch, and has a function of turning on the charging circuit for the system-dedicated battery after a predetermined time from when the starter switch of the vehicle is turned on. The in-vehicle power supply device according to any one of claims 1 to 3.

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