JPH02262857A - Feeder of car facsimile - Google Patents

Abstract

PURPOSE:To prevent the power of a main power source battery and a secondary battery from being excessively discharged by charging the auxiliary secondary battery with the current fed from the main power source battery while a car main power source switch is closed and stopping charging the auxiliary secondary battery when said switch opens. CONSTITUTION:While a car main power source switch Ig is closed, connection controllers 100 and 80 connect a power source connector 10 between a feeder PSL and a main power source battery +Bm and charge controllers 70 and 50 make a charging connection from the battery +Bm to an auxiliary secondary battery ABA. Therefore, a facsimile is fed with power from the battery +Bm and the battery ABA is charged. The battery +Bm is charged by an alternator. When the switch Ig opens, the controllers 70 and 50 cut the charging connection from the battery +Bm to the battery ABA, therefore, no power is consumed by the charge of the auxiliary secondary battery. The connection between the battery ABA and the facsimile is automatically cut a specific time after, therefore, the consumption of the power of the battery ABA when a car is not used for a long time is prevented.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a power supply device for an on-vehicle facsimile, and in particular,
A power supply battery (main power supply battery) that supplies power to the starter when the engine starts, and also supplies power to various electrical devices on the vehicle when the ignition key switch is in the ignition position (ignition switch on) or in the accessory position (accessory switch on). The present invention relates to a power supply device for supplying power to a facsimile machine mounted on a vehicle, which is also mounted on the vehicle.

(Prior art) Japanese Utility Model Application No. 60-144730 discloses that an auxiliary secondary battery is mounted on a vehicle, and when the ignition switch is on, power is supplied from the main power battery to the electrical equipment on the vehicle, and the ignition switch is turned on. A power supply device for a vehicle is disclosed in which power is supplied from an auxiliary secondary battery when the auxiliary secondary battery is off, and the auxiliary secondary battery is constantly charged via a charging circuit.

Japanese Utility Model Application No. 62-14455 discloses that the specific gravity of the electrolyte of the main power battery is detected, and if the specific gravity of the electrolyte of the main power battery exceeds a set value when the ignition switch is off (engine stopped), the main battery is activated. An on-vehicle power protection circuit is disclosed that isolates a power source battery from an on-vehicle load.

Japanese Utility Model Publication No. 62-61566 discloses a single-wire connection between a voltage detection circuit block for detecting the voltage of a main power battery and a facsimile operation control circuit block.

[Problem to be solved by the invention]

As mentioned above, when the ignition switch is on,
It has been announced that power will be supplied from the main power battery to the electrical equipment on the vehicle, and that power will be supplied from the auxiliary secondary battery when the ignition switch is off, and that a facsimile machine will be installed on the vehicle. The fax machine above has the ignition switch turned on (
When the engine is running), power is supplied to the facsimile from the main power battery, and when the ignition switch is off (engine stopped), power is supplied from the auxiliary secondary battery, and this auxiliary secondary battery is connected to the main power battery via a charging circuit. It is inferred that it is easy to think of charging from.

However, in such a vehicle facsimile power supply device, when the ignition switch is off,
For example, when receiving a facsimile and the amount of electricity in the secondary battery becomes low, the secondary battery is charged using the main power battery.
The voltage of the main power battery drops while the ignition switch is off.

Therefore, it is expected that the engine will not start even if the ignition key switch is turned to the engine start position. The addition of a secondary battery merely increases the capacity of the storage battery on the vehicle, and if there is a large amount of facsimile reception (reception while the ignition key switch is off), there is a problem of consumption of the main power battery. If you follow the teaching of the above-mentioned Japanese Utility Model Publication No. 62-74455 and cut off the main power battery from the facsimile and the secondary battery when the main power battery is exhausted to a certain extent, the main power battery is protected, but the secondary battery Batteries are not protected.

An object of the present invention is to prevent the main power battery from being consumed and also to prevent the secondary battery from being excessively consumed.

[Structure of the invention]

(Means for Solving the Problem 1) The first invention of the present application includes an auxiliary secondary battery (ABA); a power supply line (PSL) to an on-board facsimile (FAX);
On-vehicle main power battery (+8m) and auxiliary secondary battery (AB
A) Power supply connection means (10) selectively connected to A); charging connection from the on-vehicle main power battery (+Bm) to the auxiliary secondary battery (ABA) during the period when the on-vehicle main power switch (Ig) is closed; charging control means (70, 50); and, while the on-vehicle main power switch (Ig) is closed, the power supply connection means (10) is connected between the power supply line (PSL) and the on-vehicle main power battery (+8 m); The main power switch on the vehicle (
Ig) is switched from closed (H) to open (L), the power supply connection means (10) is connected from the power supply line (PSL) to the auxiliary secondary battery (AB
A), and after a predetermined time after the switching, the power supply connection means (10) is connected to the power supply line (PSL) - on-vehicle main power battery (+Bm) quantity valve connection and the power supply line (psL).
- Connection control means (100, 80) defined for connection of the auxiliary secondary battery (ABA) quantity valve;

Note that symbols in parentheses indicate corresponding elements or corresponding potentials in the later-described embodiments shown in the drawings.

(Means for Solving Problem 2) The second invention of the present application is to connect an auxiliary secondary battery (ABA); a power supply line (PSL) to an on-board facsimile (FAX);
On-vehicle main power battery (+8m) and auxiliary secondary battery (AB
Power supply connection means (10) selectively connected to A); connects the charging connection from the main power battery (+8m) on the vehicle to the auxiliary secondary battery (ABA) during the period when the main power switch (Ig) on the vehicle is closed; Charging control means (70, 50) to perform: Absence reception instruction means (83, 84, 88); and power supply connection means (10) while the main power switch (Ig) on the vehicle is closed.
, power supply line (PSL) - main power battery on vehicle (+8m
), and when the main power switch (Ig) on the vehicle is switched from closed to open, the power supply connection means (10) is connected to the power supply line (P
SL) and the auxiliary secondary battery (ABA), and when the absence reception instruction means (83, 84° 88) does not instruct the absence reception, the power supply connection means (10 ), power supply line (PST) - on-vehicle main power battery (+ Bflll) quantity valve connection and power supply line (PSL)
- When the auxiliary secondary battery (ABA) amount valve is connected and the absentee reception instruction means (83, 84, 88) instructs the absentee reception, the setting condition (accessory switch Ace on or auxiliary secondary battery voltage drop) The power supply connection means (10) is connected between the power supply line (PSL) and the auxiliary secondary battery (ABA) until
), and when the set conditions are met, the power supply connection means (10) is connected to the power supply line (PSL) - onboard main power battery (+ BIll) quantity valve connection and the power supply line (PSL).
- Equipped with connection control means (100, 90, 80) i determined for connection of the auxiliary secondary battery (+Bm) quantity valve.

(Operation 1) According to the first invention of the present application, the main power switch on the vehicle (
Ig) is closed (engine is running), the connection control means (
100, 80) connects the power supply connection means (lO) to the power supply line (P
SL) - the on-vehicle main power battery (+B+++) is connected, and the charging control means (70, 50) connects the on-vehicle main power battery (+Bm) to the auxiliary secondary battery (ABA) for charging. While the main power switch (Ig) is closed, the facsimile receives power from the main power battery (+8 m), and the auxiliary secondary battery (ABA) is charged.

The main power battery (+8m) is charged with the power generated by the alternator.

When the power switch (Ig) is opened (engine stops).

The charging control means (70, 50) cuts off the charging connection from the main power battery (+Bm) on the vehicle to the auxiliary secondary battery (ABA), thereby reducing the consumption of the main power battery (+Bm) due to charging of the auxiliary secondary battery. disappears. In addition, connection control means (1
00,80) connects the power supply connection means (10) to the power supply line (p
sL) and the auxiliary secondary battery (ABA), and after a predetermined time, the power supply connection means (10) is connected to the power supply line (psL) and the auxiliary secondary battery (ABA).
t) - Main power supply battery (+8m) on the vehicle connection and power supply line (PSL) - Auxiliary secondary battery (ABA) connection, so while the main power switch (Ig) is open (engine is running) , the main power battery (+8m) does not supply power to the facsimile machine or the auxiliary secondary battery (ABS), so there is no drop in battery voltage.

Therefore, for a predetermined period of time after the main power switch (Ig) is switched from closed (engine running) to open (engine stopped), the auxiliary secondary battery (ABA) is
For example, when the main power switch (Ig) is opened (engine stopped), even if a facsimile is being sent or received, it will not be interrupted, and if the driver is in or near the vehicle. It is possible to receive a facsimile when the driver is parked (parked or alighted from the vehicle), and when the driver learns of a facsimile transmission or reception, the driver closes the main power switch (Ig) again and waits for the facsimile communication to end. On the other hand, problems such as interruptions and missing one aircraft are solved. After a predetermined period of time, the auxiliary secondary battery (ABA) is also automatically disconnected from the facsimile, thereby preventing the auxiliary secondary battery from being exhausted when the driver is not in the vehicle for a long time.

(Effect 2) According to the second invention of the present application, in addition to the requirements of the first invention, the absence reception instruction means (83, 84, 88) is provided, and the connection control means (100, 90) is provided. , 80), when the absentee reception instruction means (83, 84, 88) instructs absentee reception, while the main power switch (Ig) is open,
Since the power supply connection means (10) is set to connect between the power supply line (PSL) and the auxiliary secondary battery (ABA) until the setting condition (accessory switch Acc ON or auxiliary secondary battery voltage drop) is established, automatic facsimile reception is possible. It is done.

When the driver plans to receive a facsimile transmission while away from the vehicle, the driver uses the absent reception instruction means (83, 84).
, 88) is set for answering. In this case, the auxiliary secondary battery (ABA) supplies power to the facsimile until the set conditions are met.

According to the second invention, in addition to the effects of the first invention, the driver can set facsimile answering under his/her own control, so that it is easy to use.

Other objects and features of the invention of this application will become clear from the following description of embodiments with reference to one drawing.

(Embodiment) FIG. 1 shows an embodiment common to the first and second inventions. A power supply connection circuit 10 is interposed between a main power input terminal MBT to which a positive pole of an on-vehicle main power battery (not shown) is connected, and a power supply line PSL. The power supply line PSL is connected to the telephone device via the current value detection resistor 21 of the current monitoring circuit 20.

It is connected to a power output terminal OUT to which a facsimile FAX and an on-vehicle wireless communication mobile device (not shown) are connected.

An auxiliary power supply line ABL is connected to an auxiliary power input terminal APT to which an auxiliary battery ABA added according to the present invention is connected via a fuse for overcurrent protection.

Power supply connection circuit 10: The power supply connection circuit 10 connects the main power supply line MBL to the main power input terminal MBT and the main power supply relay 13 and the power supply line PSL.
It includes a switching relay 11 that selectively connects the main power supply fiMBL and the auxiliary power supply line ABL.

When the transistor 14 is on (conducting), the relay 13 is closed, and when the transistor 12 is off, the relay 11 is MBL/
It is a PSL connection, but when turned on, it switches to an ABL/PSL connection. On/off of transistors 14 and 12;
The relationship with the power supply that supplies power to the power supply line PSL is as shown in Table 1 below.

The base of transistor 14 has an accessory switch input terminal AC connected to the closed accessory switch when the ignition key switch is in the accessory position (engine stopped) or the ignition position (engine running).
When a voltage of T is applied and the accessory switch is closed (
When the engine is stopped or running), a positive voltage is applied to the base of the transistor 14, and the transistor 14 is turned on.

When the ignition key switch is not in either the accessory position or the ignition position, the potential at terminal ACT is at the equipment ground level and transistor 14 is off.

An absence reception instruction circuit 80 is connected to the base of the transistor 12.
The output signal (■) is applied, and when it is H, the transistor 12 is on, and when it is L, it is off.

Current monitoring circuit 20: The current monitoring circuit 20 monitors the current value flowing through the power supply line PSL, that is, the current flowing through the telephone and facsimile FAX (hereinafter referred to as facsimile load current). A voltage proportional to the current value appears between both terminals of the resistor 21, and the amplifier 22 supplies a current at a level proportional to the potential on the high voltage side (10 side) of the resistor 21, and the amplifier 23 applies the current to the low voltage side (FAX side) of the resistor 21.
A current with a level proportional to the potential of the differential amplifier 24 is applied to the positive input terminal (+) and the reverse polarity input terminal (-
), and the differential amplifier 24 provides the comparator 25 with a voltage at a level proportional to the voltage drop (current value) across the resistor 21. The comparator 25 is at a low level L (facsimile load current: large) when the voltage drop (fli current value) 25 is equal to or higher than the first set value (IOA) given by the constant voltage circuit 26K, and is less than the first set value. At this time, a signal (■) of high level H (facsimile load current: small) is applied to one input terminal of the AND gate 70. When this signal (■) is L (facsimile load current: large), the output AO3 of the AND gate 70 is L, and the charging circuit 50 stops charging.

Another differential amplifier 26 generates a voltage representing the voltage drop across resistor 21 (facsimile load current). The polarity of the voltage generated by this is opposite to the polarity of the voltage generated by the differential amplifier 24, and is applied to the inverting input terminal of the negative phase input terminal (-) of the comparator 94 of the comparison circuit 2. When the voltage drop across the resistor 21 (facsimile load current) is equal to or higher than the second setting value of the comparator circuit 2 (two types: high value when the accessory switch is on and low value when the accessory switch is off), the output of the comparator 94 is The flip-flops (83, 84) of the answer reception instruction circuit 80 are reset and are in a state where they do not instruct answer reception (the output of 84 is L). As a result of the addition of the output of the circuit 94, the output AO8 is L, and the charging circuit 50 stops charging.

Timer circuit 100: When the ignition key switch is turned to the accessory position or the ignition position (accessory switch on or ignition switch on), the capacitor 10
1 is charged through the diode 102 and the capacitor 1
01 is charged to about the voltage of the accessory power line. At this time, the output of the comparator 106 is H. When the ignition key switch is turned to the power off position,
When the ignition switch and the accessory switch are turned off, the capacitor 101 is connected to the capacitor 101-F.
ETI 04-Equipment Earth-Resistor 103-Capacitor 1
The discharge starts in the loop of 01, and the output of the comparator 106 becomes
The signal is inverted from H to L after a predetermined time T corresponding to the time constant determined by the values of the capacitor 101 and the resistor 103. Note that the flip-flops (83, 84) of the absence reception instruction circuit 80
is set (absence reception instruction state), the output of the Nant gate 83 is L, and as a result, the positive phase input terminal of the comparator 106 is tied to the equipment ground level, and the output of the comparator 106 is L. Therefore, the output of the timer circuit 100 (output of the comparator 106) is connected to the flip-flop (8
3, 84) is set.

To summarize, the timer circuit 100 outputs H while the accessory switch is on. After the accessory switch is turned off, L is output after TL, but if the flip-flops (83, 84) are set during T, the output becomes L from that point on.

Absence reception instruction circuit 80: While the accessory switch is on (Acc=H), the transistor 87 is on, one input terminal of the Nant gate 81 is connected, and the other input terminal is connected to the output of the timer circuit 100. Therefore, the output of the Nant gate 81 is H while the accessory switch is on (the output of the Nant gate 82 is L).

When the accessory switch is turned off, the relay 15 of the power supply connection circuit 10 is turned off, one input terminal of the Nantes gate 81 of the absence reception instruction circuit 80 becomes H, and the output of the Nantes gate 81 becomes L (Nantes gate 82 The output of
: Relay 11 connects to PSL/ABL: Auxiliary battery AB
From A to PSL supply fl), then after Tt H(
Nant gate 82 output is L: Relay 11 is PSL/M
BL connection: Since relay 13 is off, no power is supplied to the PSL), but the flip-flop (
83, 84) is set, from that point on the output of the Nantes gate 81 becomes H (the output of the Nantes gate 82 becomes L:P).
(no power supplied to SL). However, when the flip-flops (83, 84) are set, the output of the Nant gate 84 becomes H, which causes the output signal of the circuit 80 (
■) maintains H and relay 11 continues to turn on, so
When the flip-flops (83, 84) are set, the PSL/ABL connection (power supply from the auxiliary battery ABL to the PSL) continues while the flip-flops (83, 84) are in the set state. When the flip-flops (83, 84) are not set during Tt.

When Tt has elapsed, the relay 11 is turned off and the power supply line PSL is not supplied with power from either the main power battery (+B m) or the auxiliary battery ABA.

Note that when the output of the comparator 94 of the comparison circuit 90 is L (the facsimile load current is equal to or higher than the second set value), or when it becomes L, one input terminal of the Nant gate 81 is L, so the output of the Nant gate 81 is is H (the output of Nantes gate 82 is L), the relay 11 is off, and the power supply line PSL is connected to the main power battery (+8m) and the auxiliary battery ABA.
There is no power supply from either.

When the output of the Nant gate 81 is L (within Tt after the accessory switch is turned off; since the accessory switch is off, the transistor 87 is off, and the input terminal of the Nant gate 83 via the resistor is H). When the reception instruction switch 88 is momentarily closed, the output of the Nantes gate 84 becomes H, which causes the output of the Nantes gate 83 to become L.
Therefore, the output of the Nant gate 84 is maintained at H (
Set: Absence reception instruction status). When the output of the Nantes gate 84 becomes H, the output signal (■) of the absence reception instruction circuit 80
is H, so the relay 11 is connected to PSL/ABL, and the output of the Nant gate 84 is H, so the transistor 85
is turned on, and the light emitting diode 86 lights up, indicating that an absentee reception is instructed. Accessory switch is on (A
When ce=H), the transistor 87 turns on and one input terminal of the Nant gate 83 becomes L, the output of the Nant gate 83 is inverted from L to H, and the Nant gate 84
The output of is inverted from H to L (reset), the transistor 85 is turned off, the light emitting diode 86 is turned off, and the output signal (■) is changed to L, and the relay 11 is set to PSL.
/MBL connection.

When the flip-flops (83, 84) are set (the output of the Nantes gate 83 becomes L), the timer circuit 100
Since the positive phase input terminal of the comparator 106 becomes L, the output of the timer circuit 100 becomes L, the output of the Nandt gate 81 becomes H, and the output of the Nandt gate 82 becomes L.

Charging circuit 50: When the output AO3 of the AND gate 70 is H, the transistor 55 is on and the light emitting diode 56 lights up to indicate that the charging circuit is on. By turning on the transistor 55,
An on-potential (equipment ground) is applied to the bases of transistors 51 and 53 for charging current control via resistors. When the transistors 51 and 53 are turned on, current flows from the power supply line PSL to the auxiliary supply ffi line ABL, and the auxiliary battery A
BA is charged, but if the charging current is large, the conductivity of transistors 52, 54 becomes high, and transistors 51, .
The base potential of transistor 53 is raised to lower the conductivity of transistors 51 and 53. Thereby, the charging current is suppressed to a predetermined level or less.

AND gate 70: The inputs of the AND gate 70 are the output of the comparator 25 of the current monitoring circuit 20 (L when the facsimile load current is equal to or higher than the first set value), and the output of the comparator 61 of the main battery voltage monitoring circuit 60. (L when voltage element Ba+ of the main power battery is equal to or lower than the third set value).

The output voltage of the ignition switch (L when the ignition switch is off), the output of the comparator 94 of the comparator circuit 2 (
(L when the facsimile load current is higher than the second set value) and the output of the comparator 41 of the comparison circuit 40 (L when the voltage of the main power battery +Bm is lower than the voltage of the auxiliary battery ABA)
, are applied, and when all of these signals are H, the AND gate 70 outputs H which instructs the output AO3 to "charge on".

When even one of the five types of signals is L, the output AO5 is used to instruct "charging off".

That is, first, the ignition switch is off (I
g = L (engine is stopped), charging circuit 50 is off and auxiliary battery ABA is not charged. Main power battery (+8m) consumption is prevented.

Second, even if the ignition switch is on (Ig=H; engine is running), the auxiliary battery ABA is not charged when the facsimile load current is equal to or higher than the first set value (the output of the comparator 25 is L). , overload of the main power battery (+B Peng) and alternator (that is, the engine) is prevented when the load is large.

Third, even if the ignition switch is on (Ig=H; engine running), the main power battery voltage terminal B
- is below the third set value (the output of the comparator 61 is L), the auxiliary battery ABA is not charged, and over-discharge of the main power battery when the voltage of the main power battery is low is prevented.

Fourth, even if the ignition switch is on (Ig=H; engine is running), when the voltage of the main power battery (+8m) is lower than the voltage of the auxiliary battery ABA (the output of the comparator 41 is L), .

Charging is not possible and the charging circuit is turned off.

Fifth, even if the ignition switch is on (Ig=H; engine is running), when the facsimile load current is equal to or higher than the second set value, the auxiliary battery ABA is not charged. overload is prevented.

Comparison circuit 40: Compares the voltage (auxiliary voltage) of the auxiliary power supply line ABL (auxiliary battery ABA) with the voltage of the power supply line PSL,
When the voltage of SL is below the auxiliary voltage, an L signal is given to the AND gate 70, and when it exceeds the auxiliary voltage, an H signal is given to the AND gate 70. The output of the comparison circuit 40 is only for turning on/off the charging circuit 50, and the first condition for turning on the charging circuit 50 is that the ignition switch is on (Ig=H: engine is running), so the comparison The problem with the output of the circuit 40 is that Ig=
Only when H. However, when Ig=H,
The accessory switch is also on (Acc=H), which turns on relay 13 of the power supply connection circuit IO, and relay 1
1 is the PSL/ABL connection, so at this time, the voltage element Ba+ of the main power battery is applied to the power supply line PSL.

Therefore, when the voltage +Bm of the main power battery exceeds the voltage of the auxiliary battery ABA, the output of the comparator circuit 40 is H. When 10B- is less than the voltage of the auxiliary battery ABA, the output of the comparator circuit 40 is L and the charging circuit 50
Turn off.

Main battery voltage monitoring circuit 60: The output of this circuit 60 is also I
This is only when g=H, and at this time, the voltage of the power supply line PSL is +B+s. Therefore, the monitoring circuit 60 is +8w
If (voltage of power supply line PSL) is equal to or higher than the third set value, H is output. If it is less than the third set value, L is output and the charging circuit 50 is turned off.

Comparison circuit 90: The voltage of the potentiometer 92 is applied to the positive phase input terminal of the comparator 94, and the output (facsimile load current) of the differential amplifier 26 of the current monitoring circuit 20 is applied to the negative phase input terminal. When the accessory switch is on (Acc=H), the transistor 95 is on and the transistor 96 is on, so the potentiometer 92 has a resistor 91.
Since current flows from the auxiliary power supply line ABL not only through the transistor 96 but also through the transistor 96, the voltage of the potentiometer 92 is high (the second setting value is high), but when the accessory switch is off (when the engine is stopped), the voltage of the transistor 95. 96 is off and the voltage across potentiometer 92 is low (second setting is low), so these voltages are
Voltage of auxiliary power supply line ABL (voltage of auxiliary battery ABA)
It also depends on the voltage of the auxiliary battery ABA.
As a result, when the accessory switch is on (the ignition switch is off or on; when it is on, the engine is running and the charging circuit 50 may be on, but when it is off, the engine is stopped and the charging circuit 50 is on). is off), the facsimile load current and the high value of the second set value (
(This also depends on the auxiliary battery voltage), when the facsimile load current is relatively high and the auxiliary battery voltage is relatively low, the output of the comparator 94 goes low, and the AND gate Applying L to 70, charging circuit 5
0 is turned off (meaningful when the ignition switch is on), and L is applied to one input terminal of the Nantes gate 81 of the answering reception instruction circuit 80 to make its output H, and the output signal (■) is Set to L and relay 11 to P S L/MB
L connection (auxiliary battery ABL to power supply line PSL
power supply to the main power supply battery and supply power to the power supply line PSL from the main power battery).

This is significant in preventing over-discharge of the auxiliary battery ABA and supplying power to the facsimile from the main battery when the ignition switch is off (charging circuit 50 off; engine is stopped).

When the accessory switch is off (the ignition switch is also off: the engine is stopped and the charging circuit 50 is off), the correlation between the facsimile load current and the low value of the second set value (which also depends on the auxiliary battery voltage) Correspondingly, when the facsimile load current is too large compared to the auxiliary battery voltage, the output of the comparator 94 becomes L, and L is applied to one input terminal of the Nant gate 81 of the absentee reception instruction circuit 80 to output the output. is set to H, the output signal (■) is set to L, and the relay 11 is connected to PSL/MBL (auxiliary battery ABL
(cutting off the power supply from the power supply line PSL to the power supply line PSL). That is, in this case, the accessory switch is off and the relay 13 is off, so the power supply line PSL is cut off from both the auxiliary power supply line ABL (auxiliary battery ABA) and the main power battery. This occurs during a predetermined time Tt after the accessory switch is switched from on to off, or when the flip-flops (83, 84) of the absence reception instruction circuit 80 are set, that is, when the relay 13 is off and the relay 11
is connected to PSL/ABL and is intended to prevent over-discharge of the auxiliary battery ABA when or when power is being supplied from the auxiliary battery ABA to the power supply line PSL.

Next, the operation of the power supply device shown in FIG. 1 in response to the driver's operation of the ignition key switch will be described.

(1) The engine key is removed from the key cylinder, and
If a long period of time has elapsed in the state where the answering reception instruction circuit 80 does not instruct answering (the flip-flops 83 and 84 are in the reset state and the output of the Nant gate 84 is L) (
Parked): Both the ignition switch and accessory switch are off (I g = L, Acc = L
), and since the timer circuit 100 has timed out, its output is L, and the output signal (■) of the answering reception instruction circuit 80 is output, and the relay 11 outputs P S L/MB L.
However, since Acc=L, the relay 13 is off, and as a result, the power supply line PSL is cut off from the auxiliary power supply line ABL (auxiliary battery ABA), and the main power supply battery (+
8m), and there is virtually no discharge of the main power battery and auxiliary battery.

(2) State where the engine key is inserted into the key cylinder, turned to the start position, and then placed in the ignition position (engine running): The engine is running, and the ignition switch and accessory switch are both on (Ig = Ht Acc =H), the relay 13 is turned on and the main power supply line MBL is connected to the main power supply battery (+8m).

Although the output of the comparator 106 of the timer circuit 100 is H,
In the absence reception instruction circuit 80, the transistor 87 is on, so that the output of the Nant gate 81 is H and the output of the Nant gate 82 is H, and the flip-flops (83, 84) are reset by Acc=H. Since the output of the Nant gate 84 is L, the output signal (2) of the circuit 80 is generated, and the relay 11 is connected to PSL/MBL. Therefore, the main power battery (
+8m) supplies power.

Since Ig=H, H is added to the resistor input terminal of the AND gate 70, so the main power battery voltage +Bm is higher than the third setting value (output of 61=H), and the facsimile load current is the first setting value. (output of 25 is H), the voltage of auxiliary battery ABA is below +8 layer (output of 41 is H), and the facsimile load current is less than the high value of the second setting value (9
4 output is H: the facsimile load current is relatively low compared to the auxiliary battery voltage), the output AO3 of the AND gate 70 is H and the charging circuit 50 is on. The auxiliary battery ABA is charged from the main power batch υ. Even one of the above conditions does not hold (L
), AOS goes low, charging circuit 50 is turned off, and charging of auxiliary battery ABA is interrupted.

(3) State where the engine key is returned to the accessory position and rotated: The ignition switch is off (Ig = L), the accessory switch is on (Acc), and since Ig = L, this causes the output AO5 of the AND gate 70 to be Since it is set to L, the charging circuit 50 is off and the auxiliary battery ABA is not charged.

Since the relay 13 is on and the output signal ■ of the absence reception instruction circuit 80 is L, the relay 11 is connected to PSL/ABL, and the power supply line PSL is connected to the main power battery (+B■).
supplies power.

(4) State where the engine key is removed from the key cylinder: The ignition switch is off (Ig=L), the accessory switch is also off (Acc=L), and the transistor 14 of the power supply connection circuit 10 is turned off. Acc=
It is off at L, and the relay 13 is off. That is, the main power battery (+8 m) is cut off from the main power supply line MBL. Charging circuit 50 is off and auxiliary battery ABA is not charged.

The timer circuit 100 stops charging the capacitor 101 when the accessory switch changes from on to off, and the capacitor 101 starts discharging a predetermined time Tt after switching from on to off.

The output of the timer circuit 100 changes from H to L.

During the period T until the output of the timer circuit 100 changes from H to L (output of the timer circuit 100 = H), the transistor 87 of the absence reception instruction circuit 80 is turned off, the output of the Nant gate 81 is output, and the Nant gate 81 is turned off. The output is H, the transistor 12 is on, and the relay 11 is connected to PSL/ABL (power is supplied from the auxiliary battery ABA to the power supply line ABL).

Even in this state, if the facsimile load current exceeds the low second set value (the facsimile load current is too large compared to the auxiliary battery voltage), the output of the comparator 94 changes from H to L and the Nant gate The output of 81 changes to H, the output of Nantes gate 82 changes to L, the output ■ of the absence reception instruction circuit 80 changes to L, and the relay 11 changes to PSL/MBL.
connection (from auxiliary battery ABA to power supply line PSL)
), and relay 13 is off, so
Power is no longer supplied to the power supply line PSL.

When the Tt has elapsed, the output of the timer circuit 100 becomes L, so the output of the Nantes gate 82 becomes L, and the relay 11 switches to PSL/MBL connection (power is not supplied from the auxiliary battery ABA to the power supply line PSL). Since the relay 13 is off, power is no longer supplied to the power supply line PSL.

Then, the above-mentioned state (1) is reached.

Note that if the absence reception instruction switch 88 is momentarily closed before the Tt elapses, at this time the Nantes gate 8
Since the output of 1 is L, this is added to one input terminal of the Nant gate 84, and the output of the Nant gate 84 changes from L to H.
(the flip-flop is in the set state, that is, the absent reception instruction state), the transistor 85 is turned on, the light emitting diode 86 is lit, and the output signal ■ is maintained at H, so the relay 11 is connected to PSL/ABL. is maintained, and the auxiliary battery ABA supplies power to the power supply line PSL. In this state, when the engine key is later inserted into the key cylinder and turned to the 7-point position (accessory switch on), the transistor 87 is turned on and L is applied to one input terminal of the Nant gate 83. When the output of the gate 83 becomes H, it is reset (to a state where there is no instruction to receive an absentee call).

When the facsimile load current exceeds the low value of the second set value (the facsimile load current is too large compared to the auxiliary battery voltage) in the above-mentioned set state (absence reception instruction state), the output of the comparator 94 changes from H to H. The output of the Nantes gate 81 changes to H, the output of the Nantes gate 82 changes to L, the output ■ of the absence reception instruction circuit 80 changes to L, and the relay 11 switches to PSL/MBL connection (auxiliary battery A
The power supply from BA to the power supply line PSL is stopped), and relay 1
3 is off, power is no longer supplied to the power supply line PSL.

〔Effect of the invention〕

As described above, according to the first invention of the present application, while the on-vehicle main power switch (Ig) is closed (engine is running), the connection control means (100, 80) connects the power supply connection means (10).
Supply t'lt line (PSL) - Vehicle main power battery (+B
■) connection, and the charging control means (70, 50)
From the main power battery (+8m) on the vehicle surface to the auxiliary secondary battery (A
Since the charging connection is made to the main power switch (I
g) is closed, the fax machine is powered by the main battery (+8
m), and the auxiliary secondary battery (ABA) is charged. The main power battery (+Bm) is charged with the power generated by the alternator.

When the power switch (Ig) is opened (engine stops).

Since the charging control means (70, 50) cuts off the charging connection from the main power battery (+BI11) on the vehicle to the auxiliary secondary battery (ABA), the main power battery (+8m) is no longer consumed by charging the auxiliary secondary battery. . In addition, connection control means (1
00,80) connects the power supply connection means (10) to the power supply line (P
SL) - auxiliary secondary battery (ABA) connection, and after a predetermined time (Tt), connect the power supply connection means (10) to the power supply line (PSL) - on-vehicle main power battery (+Bm) connection and Power feed line (PSL) - Auxiliary secondary battery (ABA)
The main power switch (Ig) is open (
During engine operation), the main power battery (+Bm) does not supply power to the facsimile machine and the auxiliary secondary battery (ABS), and there is no drop in battery voltage.

Therefore, for a predetermined time (Tt) after the main power switch (Ig) is switched from closed (engine running) to open (engine stopped), the auxiliary secondary battery (ABA) supplies power to the facsimile (FAX). For example, the main power switch (
Ig) is opened (engine stopped), even if a facsimile is being sent or received, it will not be interrupted, and facsimile reception is possible when the driver is in or near the vehicle, and the facsimile When the driver learns of transmission or reception, the driver closes the main power switch (Ig) again and waits for the facsimile communication to end. The problem will be improved. After a predetermined period of time (T), the auxiliary secondary battery (ABA) is also automatically cut off from the facsimile, so if the driver does not ride for a long time
Next battery consumption is prevented.

According to the second invention of the present application, in addition to the requirements of the first invention, the absence reception instruction means (83, 84, 88) is provided, and the connection control means (100, 90, 80) is provided. , when the absentee reception instruction means (83, 84, 88) instructs absentee reception, while the main power switch (Ig) is open,
Since the power supply connection means (10) is set to connect between the power supply line (PSL) and the auxiliary secondary battery (ABA) until the setting condition (accessory switch Ace on or auxiliary secondary battery voltage drop) is established, automatic facsimile reception is possible. It is done.

When the driver plans to receive a facsimile transmission while away from the vehicle, the driver uses the absentee reception instruction means (83, 84).
, 88) is set to receive an answering call. In this case, the auxiliary secondary battery (ABA) supplies power to the facsimile until the setting conditions are met.

According to the second invention, in addition to the effects of the first invention, the driver can set facsimile answering under his/her own control, so that it is easy to use.

[Brief explanation of drawings]

FIG. 1 is an electrical circuit diagram showing the configuration of an embodiment of the invention of the present application. ABA: Auxiliary battery (auxiliary secondary battery) FAX: Facsimile (vehicle facsimile) PSL: Power supply line (
Power supply line) 00th: Power output terminal MBT e Main power input terminal +Bm: Main power main power battery voltage
: Main power feed line ABL : Auxiliary power feed line APT
: Auxiliary power input terminal 10: Power supply connection circuit (power supply connection means) IGT: Ignition switch input terminal
: Ignition switch output voltage ACT : Accessory switch input terminal Ace : Accessory switch output voltage 20 : Current monitoring circuit
40: Comparison circuit 50: Charging circuit 60
: Main battery voltage monitoring circuit 70: AND gate (5
0, 70: Charging control means) 80: Absence reception instruction circuit
83, 84: NAND gate 88: Absence reception instruction switch (83, 84, 88: Absence reception instruction means) 90:
Comparison circuit 100: timer circuit (100, 80: connection control means;
100, 90.80: connection control means)

Claims (2)

[Claims] (1) Auxiliary secondary battery; Power supply connection means for selectively connecting the power supply line to the on-vehicle facsimile to the on-vehicle main power battery and the auxiliary secondary battery; Charging control means for connecting the upper main power supply battery to the auxiliary secondary battery; and, while the vehicle main power switch is closed, the power supply connection means;
The connection is established between the power supply line and the main power supply battery on the vehicle, and when the main power switch on the vehicle is switched from closed to open, the power supply connection means is determined to be the connection between the power supply line and the auxiliary secondary battery, and a predetermined period of time is established from the switching. A power supply device for an on-vehicle facsimile, comprising: connection control means that later determines that the power supply connection means is disconnected between the power supply line and the on-vehicle main power battery and between the power supply line and the auxiliary secondary battery. (2) Auxiliary secondary battery; Power supply connection means for selectively connecting the power supply line to the on-vehicle facsimile to the on-vehicle main power battery and the auxiliary secondary battery; Charging control means for connecting charging from the upper main power battery to the auxiliary secondary battery; Absence reception instruction means; and, while the on-vehicle main power switch is closed, the power supply connecting means;
The connection between the power supply line and the main power supply battery on the vehicle is set, and when the main power switch on the vehicle is switched from closed to open, the power supply connection means is set to the connection between the power supply line and the auxiliary secondary battery, and the absence reception instruction means If you have not instructed to receive an answer when you are away, the power supply connection means is set to disconnect between the power supply line and the main power battery on the vehicle and between the power supply line and the auxiliary secondary battery after a predetermined period of time after the switching. When the reception instructing means instructs to receive an answering request, the power supply connection means is set to the connection between the power supply line and the auxiliary secondary battery until the setting condition is satisfied, and when the setting condition is satisfied, the power supply connection means , the feed line - on-vehicle main power battery valve open connection and the feed line - auxiliary 2
A power supply device for an on-vehicle facsimile, comprising: connection control means that determines that the battery is disconnected;