JPS63249434A - Backup electric source structure for vehicle electronic equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is applicable to a backup power supply for in-vehicle electronic equipment. Regarding IS construction, especially backup power supply for in-vehicle electronic equipment that requires continuous power supply (111 construction).

<Conventional technology> Conventionally, in-vehicle electronics that require a continuous supply of power such as G31[+;'l Hli, etc.] have been replaced with the main electric 1 (11,
Since power is no longer supplied to the circuit of this electronic device:z;, a relatively quick and small backup battery is installed in the internal circuit of the device.3゜As this type of circuit, for example, Fig. 2 shows a so-called driving information device 1 connected to various ranges 5 installed in various parts of the vehicle to display information such as fuel consumption, mileage, remaining fuel amount, etc. inside the vehicle. It has been done.

In this driving information device 1, there is a battery C as a back-up power source, which may be a lithium battery C.
10 It is provided from the time the alarm device 1 is assembled. This battery 2 forms an independent circuit within the driving information device 1, and if power is not supplied from the cylindrical battery 4, power is supplied to the power supply circuit 6 instead. .

However, if a relatively long period of time elapses between the time the circuit in the device is assembled and the time when the coupler 3 is connected for actual use, the battery 2, that is, the backup power source, may become depleted. . Therefore, after connecting the coupler 3, when the main power source is removed for replacement, for example, when the car battery 4 is struck, data stored in the memory in the device circuit may be lost.

Problems to be Solved by the Invention In view of the problems of the prior art, the main object of the present invention is to provide an on-vehicle electronic I/O system that requires continuous power supply. The purpose of the present invention is to provide a backup power structure for vehicles and logging equipment that will reliably supply backup power when the main power supply means is removed for replacement or the like.

<Means to Solve the Problems> According to the present invention, the object is to provide a backup power supply structure for automobiles and electronic devices having a main power source and a backup power source, which includes the main power source and the At least a portion of a first circuit that electrically connects the in-vehicle electronic device and at least a portion of a second circuit that electrically connects the backup power source and the in-vehicle electronic device are connected to the in-vehicle electronic device. both the circuit parts formed outside and the in-vehicle electronic I
This is achieved by providing a backup power supply structure for in-vehicle electronic equipment, characterized in that both the circuits are completed by connecting the A and A devices via a detachable coupler.

<Operation> With this arrangement, backup power is not supplied until the coupler is connected to the in-vehicle electronic equipment, and the backup power supply becomes effective from the point where continuous power supply is actually required.

<Embodiments> Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a vehicle running information l) device 11 for displaying fuel consumption, mileage, fuel consumption, etc. in the conductor of a train, an on-board battery 14, and various sensors 9-15. The block diagram is not shown.

Signal lines from various sensors 15 such as a medium speed sensor or a fuel remaining sensor are connected to an input circuit 18 via a contact 21 of a coupler 13, and from the input circuit to a CPU 17 having a memory circuit inside. ing. The CPU 17 is connected to a display 20 via a display driver 19. Here, the coupler 13 consists of a pair of fitting portions provided on the driving information device 11 side and the outside side, which are electrically connected by fitting each other.

The vehicle battery 14 is connected to the power supply circuit 16 via the contact 24 of the coupler 13 and the diode D1, and the power supply circuit 16 is connected to the display 12 via the CPU 17, the input circuit 18, and the display driver 19, and is also connected to the power supply circuit 16. is supplied. Denga 1 Doro 16, CPU 17,
The input circuit 18 and the driver 19 are connected to the contacts 22 of the coupler 13.
It is grounded to the external vehicle body etc. via the Power supply circuit 16
is also connected to the positive side of a battery 12 as a backup power source, which may be a lithium battery, via a diode D2. The negative electrode side of this battery 12 is connected to the contact 2 of the coupler 13.
The other end of the external connection 26 is grounded to the vehicle body similarly to the power supply circuit 16 and the like described above.

Here, the voltage of the battery 12 is even lower than the voltage of the vehicle battery 14! Therefore, no current flows from the battery 12 while power is being supplied from the vehicle-mounted battery 14 to the driving information device eX 11.

In a vehicle equipped with such a driving information device 11, assemble the vehicle, mount the battery 14, and connect the coupler 13.
Until the pair of 1-joint parts are fitted together, that is, contact 2
1 to 24 are connected and the driving information device 11 becomes actually usable, signals from the various hinges 15 and power from the vehicle battery 14 are not supplied to the device. In addition, the negative terminal of the battery 12 (some of the connections 2G on both sides are exposed to the outside, so the negative terminal side of the battery 12 is not grounded and no backup power is supplied. Therefore, the actual connection inside the CPU 17 By the time it becomes necessary to store data in the memory, the battery 12 can be fully depleted before the vehicle is shipped, and after starting to use the driving information device 11, When the power supply from the battery 14 stops, for example when the in-vehicle battery 14 is removed for replacement, backup power is preferably supplied, so data in the memory in the CPU 17 will not be lost. It's fleeting.

<Effects of the Invention> As described above, according to the present invention, in an electronic device having a main power source and a backup power source, it is possible to prevent the power source from being exhausted until the backup power source is actually required. Since the data inside the device is reliably backed up even when the main power supply is removed, ease of removal and reliability of in-vehicle electronic devices are improved, and the effect is extremely large.

[Brief explanation of drawings]

FIG. 1 is a diagram schematically showing an electronic equipment circuit equipped with a backup power supply (1) according to the present invention. It is a block diagram showing a light fixture circuit. 1... Traveling information charge '+i'j 2... Battery 3.
・・Kabura 4・・Car 4-fold battery 5・・・・
Various sensors 9 6...Power supply circuit 7...CPU
11... Running foil + 'Lu%% loading 12...
Battery 13...Cover 14...Car battery 7
15... Various sensors 91 (5... Power supply circuit
17...CPU18...Input circuit 19...Display driver 20...Display 21-24...Contact 2G・
・External connection

Claims (2)

[Claims] (1) A backup power supply structure for an in-vehicle electronic device having a main power source and a backup power source, wherein at least a part of a first circuit that electrically connects the main power source and the in-vehicle electronic device, and the backup power source At least a part of a second circuit that electrically connects a power source and the on-board electronic device is formed outside the on-board electronic device, and both circuit portions formed outside and the on-board electronic device are connected to each other. A backup power supply structure for in-vehicle electronic equipment, characterized in that both circuits are completed by being connected via a detachable coupler. (2) The in-vehicle electronic device according to claim 1, wherein the backup power source is built in the in-vehicle electronic device, and the main power source is provided outside the in-vehicle electronic device. backup power structure.