JPH064060Y2 - Automotive power supply - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention is, for example, an automobile used to supply a starting device with a changed power supply voltage when starting the engine of the automobile. The present invention relates to a power supply device for use.

(Prior Art) Conventionally, for example, an automotive power supply device of a power supply voltage switching system as described above is known to be used in a large diesel vehicle. This power supply device connects two batteries in series to increase the power supply voltage at the time of starting the engine of a heavy-duty diesel vehicle used particularly in cold regions, and operates the starter or preheater with the power supply with the increased voltage. It was done like this.

FIG. 3 illustrates an example of the above-mentioned power supply voltage switching type automobile power supply device.

That is, the power supply device for an automobile shown in the figure has two movable contacts 104, 10 assembled with two 12-volt specification batteries 101, 102 and one solenoid 103.
5, 106 and fixed contacts 107, 108, 109, 1
And a switching mechanism 111 provided with 10.

Then, by operating the starter switch SW ′ to the start ST side, the solenoid 103 is excited to bring the movable contact 106 into contact with the fixed contact 110 and the movable contact 105 into contact with the fixed contact 109, so that the movable contact 10
4 separates from the fixed contact 107. Therefore, the battery 10
1 and the battery 102 are connected in series via a fixed contact 110 and a movable contact 106, and a voltage of 24 V is supplied to the starter S via a connection between the movable contact 105 and the fixed contact 109.

When the starter switch SW 'is switched from the start ST side to the ignition IG side, the solenoid 1
03 is de-excited and each movable contact 104, 105, 10
6, the movable contact 104 contacts the fixed contact 107, the movable contact 105 separates from the fixed contact 109 and contacts the fixed contact 108, and the movable contact 106 separates from the fixed contact 110. A parallel circuit with 102 is formed so as to supply a voltage of 12 V to another electric circuit (not shown).

(Problems to be Solved by the Invention) However, in the above-described conventional vehicle power supply device, the vehicle power supply has a structure in which the three movable contacts 104, 105, 106 are driven by one solenoid 103. There is a problem in that the size of the entire device becomes large, and the degree of freedom of the mounting location in the vehicle is low. Also,
At the time of supplying the 24V power supply voltage to the starter S, the movable contact 105 is provided in order to prevent a dead short.
Is required to come into contact with the fixed contact 110 after the movable contact 106 is separated from the fixed contact 108. In order to reliably perform this switching, sequence adjustment accuracy between the contacts is required, and the adjustment work is complicated. There was also the problem that

(Object of the Invention) Therefore, the present invention was conceived in order to solve the above-mentioned conventional problems, and it is possible to increase the degree of freedom of a mounting place in a vehicle and perform a reliable switching. It is intended to provide a power supply device for use.

[Structure of the Invention] (Means for Solving the Problems) In the structure of the present invention for achieving the above object, one end is grounded and the other end is connected to a load for 12 volts.
A first battery having a 2 volt supply voltage; a second battery having a 12 volt supply voltage; a first contact connected to the other end of the first battery; and one end of the second battery. A first exciter including a connected second contact and a first exciting coil that opens and closes between the first contact and the second contact and closes the first and second contacts when not excited. A switching mechanism, a third contact connected to the other end of the second battery, and a fourth contact connected to the one end of the first battery,
A second switching mechanism including a second exciting coil that opens and closes between the third contact and the fourth contact and closes between the third and fourth contacts when not excited; A fifth contact connected to the other end of the battery, a sixth contact connected to the other end of the second battery, opening and closing between the fifth contact and the sixth contact, and de-excitation A third switching mechanism, which sometimes includes a third exciting coil that opens between the fifth and sixth contacts, and the third exciting coil is delayed from the first exciting coil to be excited, and the third exciting coil is excited. And a control mechanism for delaying the first exciting coil from the exciting coil and deactivating the first exciting coil.

FIG. 1 is a diagram showing a basic configuration of an automobile power supply device according to the present invention. An automobile power supply device 1 shown in the drawing has one end grounded and the other end connected to a 12-volt load. A first battery 2 having a supply voltage, 12
A second battery 3 having a volt supply voltage and the first battery
A first contact 10 connected to the other end of the battery 2 of
A second contact 11 connected to one end of the second battery 3
And opening and closing between the first contact 10 and the second contact 11 and deactivating the first and second contacts 10 and 11
A first switching mechanism 4 including a first exciting coil 12 that closes the space, and a third switching mechanism 4 connected to the other end of the second battery 3.
Contact point 13, a fourth contact point 14 connected to the one end of the first battery 2, the third contact point 13 and a fourth contact point
Second switching mechanism 5 having a second exciting coil 15 that opens and closes the contacts 14 of FIG. 1 and closes the third and fourth contacts 13 and 14 when not excited, and the first battery. The fifth contact 16 connected to the other end of 2, the sixth contact 17 connected to the other end of the second battery 3, and the opening and closing between the fifth contact 16 and the sixth contact 17 A third switching mechanism 6 including a third exciting coil 18 that opens and closes between the fifth and sixth contacts 16 and 17 when performing and non-exciting.
And the third exciting coil 18 is delayed from the first exciting coil 12 to be excited, and the third exciting coil 1
And a control mechanism 7 for delaying the first exciting coil 12 from 8 to make it non-excited.

In the automobile power supply device 1 having such a basic configuration, a starter (not shown) is provided on the starting side (starter switch S
When W'is operated to the ON side), the switching mechanism operates in the order of the first switching mechanism 4, the second switching mechanism 5, and the third switching mechanism 6 in response to the signal from the control mechanism 7. The first battery 2 and the second battery 3 are connected in series to supply a high voltage of 24 volts. That is, a 24-volt power supply is supplied to a starter motor (not shown).

Next, when the starter is operated to the non-starting side (starter switch SW ′ is OFF side), the signal from the control mechanism 7 causes the third switching mechanism 6, the second switching mechanism 5, and the first switching mechanism 4 to operate. The respective switching mechanisms are restored in order, the first battery 2 and the second battery 3 are connected in parallel, and a normal voltage of 12 volts is supplied.

(Embodiment) An automobile power supply device according to an embodiment of the present invention will be described below with reference to FIG.

That is, the power supply device 1 for an automobile has a first battery 2 having a 12-volt supply voltage whose one end is grounded and the other end is connected to a load for 12-volt, and a 12-volt like the first battery 2. A second battery 3 having a supply voltage and a first battery connected to the other end of the first battery 2.
The contact 10 of the second battery 3, the second contact 11 connected to one end of the second battery 3, and the first contact 10 and the second contact 11 are opened and closed and the first and second contacts are deenergized. First exciting coil 12 that closes the contacts 10 and 11 of the
In this embodiment, a first switching mechanism 4 which is a relay and a third switching device connected to the other end of the second battery 3 are provided.
Contact point 13, a fourth contact point 14 connected to the one end of the first battery 2, the third contact point 13 and a fourth contact point
The second switching mechanism, which is a relay in this embodiment, is provided with a second exciting coil 15 that opens and closes the contacts 14 of FIG. 1 and closes the third and fourth contacts 13 and 14 when not excited. 5, a fifth contact 16 connected to the other end of the first battery 2, a sixth contact 17 connected to the other end of the second battery 3, a fifth contact 16 and In this embodiment, a third relay, which is a relay, is provided which opens and closes the sixth contact 17 and opens between the fifth and sixth contacts 16 and 17 when de-energized. A switching mechanism 6 and a control mechanism for delaying the third exciting coil 18 from the first exciting coil 12 to be excited and delaying the first exciting coil 12 from the third exciting coil 18 to be non-excited. 7 and 7.

The control mechanism 7 includes a fixed contact 32, a movable contact 31, and an exciting coil 30 which are connected to the first exciting coil 12.
Relay RL2, a relay RL3 having a fixed contact 35, a fixed contact 44, a movable contact 34 and an exciting coil 33 which are connected to the second exciting coil 15 via a diode D9, and the third exciting coil 18 A relay RL4 having a fixed contact 38, a movable contact 37 and an exciting coil 36 connected to the fixed contact 4 connected to the exciting coil 42 of the starter relay 8 via an external terminal CL1.
1, a relay R having a movable contact 40 and an exciting coil 9
L5 and a relay RL1 connected to the fixed contact 31 of the relay RL2 via a diode D11.

The external terminal B ₂ of the control mechanism 7 is connected to the fixed terminal 43 of the relay RL1, and is also connected to the resistor R4, the base of the transistor TR2, and the resistor R5 via the Zener diode ZD. The collector of the transistor TR2 is grounded via the capacitor C4.

The external terminal ST of the control mechanism 7 is connected to the resistor R1, the other end of the capacitor C1 whose one end is grounded, and the diode D1. Here, the external terminal ST is divided into two parts, one of which is the relay RL3.
Is connected to the fixed terminal 44. The other is connected to the other end of the capacitor C2 whose one end is grounded, the resistor R2, the other end of the resistor R3 whose one end is grounded, and the base of the transistor TR1, and the collector of the transistor TR1.
One end is connected to the other end of the capacitor C3 whose ground is connected to the exciting coil 30 of the relay RL. Then, this connection end is connected to the fixed terminal 35 of the relay RL3 via the diode D20.

The external terminal ST is connected to the resistor R6, the other end of the resistor R7 whose one end is grounded, and the base of the transistor TR3. The external terminal ST is connected to the collector of the transistor TR3 and the other end of the capacitor C5 whose one end is grounded. , And is connected to the exciting coil 33 of the relay RL3. This connection end is connected to the transistor TR2 via the diode D4.
The diode D13 is connected to the
Is connected to one end of the exciting coil 39 of the relay RL5.

Further, the external terminal ST is connected to the other end of the exciting coil 39 of the relay RL5, and is also connected to one end of the exciting coil 36 of the relay RL4 via the diode D8 and the diode D6. A diode D7 connected to the external connection terminal CL1 is connected to a connection point between D8 and the diode D6.

The external terminal CL1 is connected to the fixed terminal 41 of the relay RL5, connected to the base of the transistor TR4 via the resistor R8, and further grounded via the resistor R9. The collector of the transistor TR4 is connected to one end of the exciting coil 39 of the relay RL5.

Next, the operation of the vehicle power supply device 1 according to the above embodiment will be described.

First, when the starter switch SW ′ is turned on, a voltage is applied to the base of the transistor TR1 via the resistor R1, the diode D1, and the resistor R2, and the transistor TR1 is turned on.
1 is turned on, the exciting coil 30 of the relay RL2 is energized and excited through the diode D10, and the relay R1
The second movable contact 31 and fixed contact 32 are closed. As a result, power is supplied to the exciting coil 12 of the first switching mechanism 4 via the external terminal BL1 of the control mechanism 7,
When excited, the first switching mechanism 4 operates.

When the starter switch SW 'is turned on, as described above, the transistor TR1 is turned on, and at the same time, a voltage is applied to the base of the transistor TR3 via the resistor R6 and the transistor TR3 is also turned on, so that the relay RL3.
The exciting coil 33 is excited to bring the movable contact 34 of the relay RL3 into contact with the fixed contact 35. As a result, the external terminal AL2 of the control mechanism 7 is grounded, whereby the exciting coil 15 of the second switching mechanism 5 is excited and the second
The switching mechanism 5 is activated.

Further, by turning on the starter switch SW ′, at the same time as turning on the transistors TR1 and TR3,
The exciting coil 36 of the relay RL4 is excited via the diodes D8 and D6, and the movable contact 37 of the relay RL4 is closed with the fixed contact 38. As a result, the external terminal DL2 of the control mechanism 7 is grounded, the exciting coil 18 of the third switching mechanism 6 is excited, and the third switching mechanism 6 operates.

In other words, by turning on the starter switch SW ',
The contact 1 of the first switching mechanism 4 is controlled by each control of the control mechanism 7.
0 and the contact 19 are brought into contact with each other, and the contact 1 of the second switching mechanism 5
4 and the contact 20 are brought into contact with each other, and the contact 1 of the third switching mechanism 6
6 and the contact 17 are brought into contact with each other, and the respective switching mechanisms described above are sequentially operated to bring the first battery 2 and the second battery 3 into a serial connection state, and the control mechanism 7 is set to a voltage of 24 volts. Is generated at the external terminal B2.

Then, when 24 V is generated at the external terminal B2, the transistor TR2 is turned ON via the Zener diode ZD (Zener voltage specification of 18 V), and the relay RL3 is in the operation memory state via the diode D13 and the diode D4. Becomes That is, while the 24-volt power source is generated at the external terminal B2 of the control mechanism 7, the first switching mechanism 4 and the second switching mechanism 5 are kept in the operating state, and the 24-volt power source is supplied to the starter motor. The starter motor can be rotated.

Further, here, the diode D13 is grounded,
As a result, the exciting coil 39 of the relay RL5 is excited, the contact 40 and the contact 41 of the relay RL5 are closed, and turned on by applying power to the base of the transistor TR4 via the resistor R8. Therefore, the relay RL5 is in the operation memory state. Then, power is applied to the diode D7, the exciting coil 36 of the relay RL4 is excited, and the movable contact 37 of the relay RL4 is excited.
And the fixed contact 38 are closed.

Next, starter switch SW 'is turned off from ON operation.
When switched to the operation, the transistor TR1 is turned off, the transistor TR3 is also turned off, and the diode D8 is not energized, but the transistor TR2 is turned on through the Zener diode ZD and the diode D4 is grounded. , Relay RL3 is held,
The second switching mechanism 5 enters the holding state via the diode D9.

Then, in the relay RL5, the power supply of the exciting coil 39 is turned off.
By doing so, the movable contact 40 and the fixed contact 41 of the relay RL5 are opened, and the potential of the external terminal CL1 of the control mechanism 7 disappears.

Further, when the exciting coil 36 of the relay RL4 is also turned off, the movable contact 37 and the fixed contact 38 of the relay RL4 are opened, and the third switching mechanism 6 connected to the external terminal DL2 of the control mechanism 7 is opened. The exciting coil 18 is de-excited and the third switching mechanism 6 returns.

Here, the capacitor C4 is OFF, the exciting coil 33 of the relay RL3 is in the non-excited state via the diode D4, the movable contact 34 of the relay RL3 is restored, and thus the excitation of the second switching mechanism 5 is performed. Coil 15
Becomes a non-excitation state, and the second switching mechanism 5 returns.

That is, the external terminal DL2 of the control mechanism 7 is connected to the relay RL.
5 and the relay RL4 are both turned off after returning, and the external terminal AL2 of the control mechanism 7 is turned off after the relay RL3 is returned via the diode D5.

Then, after the relay RL3 returns, the condenser C2
With the delayed discharge of, the relay RL2 also recovers, the excitation relay 12 of the first switching mechanism 4 becomes non-excited, and the first switching mechanism 4 also recovers.

That is, by this, the signal of the control mechanism 7 sequentially controls the first switching mechanism 4, the second switching mechanism 5, and the third switching mechanism 6 to supply power to the starter motor from 12 volts to 24 volts. After switching to and supplying power to the bolt, the third switching mechanism 6, the second switching mechanism 5, and the first switching mechanism 4 can be turned off in this order to return the 24 volt power source to 12 volts, and dead shoot. In order to prevent this, there is no need to perform complicated sequence adjustment as in the past.

[Effects of the Invention] As described above, according to the power supply device for an automobile of the present invention, the first battery having the 12-volt supply voltage, one end of which is grounded and the other end of which is connected to the 12-volt load. A second battery having a 12 volt supply voltage; a first contact connected to the other end of the first battery; a second contact connected to one end of the second battery; A first switching mechanism including a first exciting coil for opening and closing the first contact and the second contact and closing the first and second contacts when not excited; A third contact connected to the other end of the battery, a fourth contact connected to the one end of the first battery, and opening and closing between the third contact and the fourth contact and de-excited. Sometimes a second closing between the third and fourth contacts
A second switching mechanism including an exciting coil, a fifth contact connected to the other end of the first battery, and a sixth contact connected to the other end of the second battery. , The fifth
A third switching mechanism including a third exciting coil that opens and closes between the first contact and the sixth contact and opens between the fifth and sixth contacts when not excited; And a control mechanism for delaying the third exciting coil from the exciting coil and exciting the third exciting coil, and delaying the first exciting coil from the third exciting coil to de-excite the vehicle. This has an excellent effect that the degree of freedom of the mounting place can be dramatically increased as compared with the conventional one and that the power can be switched surely.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a basic configuration of an automobile power supply device according to the present invention, FIG. 2 is a circuit diagram showing an automobile power supply device according to an embodiment of the present invention, and FIG. It is a circuit diagram which shows the conventional power supply device for motor vehicles. DESCRIPTION OF SYMBOLS 1 ... Automotive power supply device, 2 ... 1st battery, 3 ... 2nd battery, 4 ... 1st switching mechanism, 5 ... 2nd switching mechanism, 6 ... 3rd switching mechanism, 7 ... Control mechanism, 10 ... 1st contact, 11 ... 2nd contact, 12 ... 1st exciting coil, 13 ... 3rd contact, 14 ... 4th contact, 15 ... 2nd exciting coil, 16 ... 5th contact , 17 ... sixth contact, 18 ... third exciting coil.

Front page continuation (72) Inventor Katsuhiko Saito 1-chome, Ii-chome, Ageo City, Saitama Prefecture Nissan Diesel Industry Co., Ltd. (72) Yuichi Tanji 1-chome, Ageo-shi, Saitama Prefecture Nissan Diesel Industry Co. (72) Inventor Katsushi Kato 1760, Higashimatano-cho, Totsuka-ku, Yokohama, Kanagawa Prefecture Automotive Electric Industry Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A first battery having a 12 volt supply voltage having one end grounded and the other end connected to a 12 volt load; a second battery having a 12 volt supply voltage; and the first battery. A first contact connected to the other end of the battery, a second contact connected to one end of the second battery, the first contact and the second contact are opened and closed, and are deenergized. A first switching mechanism including a first exciting coil that closes between the first and second contacts, a third contact connected to the other end of the second battery, and a first contact of the first battery. A fourth contact connected to the one end,
A second switching mechanism including a second exciting coil that opens and closes between the third contact and the fourth contact and closes between the third and fourth contacts when not excited; A fifth contact connected to the other end of the battery, a sixth contact connected to the other end of the second battery, and opening and closing between the fifth contact and the sixth contact and at the time of non-excitation A third switching mechanism including a third exciting coil that opens between the fifth and sixth contacts, and the third exciting coil is delayed from the first exciting coil to be excited and the third exciting coil is excited. A power supply device for an automobile, comprising: a control mechanism that delays the first excitation coil from the excitation coil to deactivate the first excitation coil.