Electricity: battery or capacitor charging or discharging – Battery or cell discharging – Regulated discharging
Reexamination Certificate
2002-02-25
2003-09-16
Tso, Edward H. (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell discharging
Regulated discharging
Reexamination Certificate
active
06621249
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a battery charge and discharge system and, more particularly, to a battery charge and discharge system of an apparatus on which an auxiliary battery is mounted.
BACKGROUND ART
As an apparatus having an auxiliary battery mounted thereon, which charges and discharges the auxiliary battery, a vehicle security system is exemplified.
FIG. 7
is a block diagram schematically showing the principal part of a conventional security system. A master
1
A as a security device side comprises a microcomputer
1
a
to perform various types of control. Connected to input terminals of the microcomputer
1
a
are an ignition switch
2
to detect whether the position of an ignition key is ON or OFF, a key insert switch
3
to detect whether or not the ignition key is inserted into a key cylinder of an engine, a door courtesy switch
4
to detect whether doors are open or closed, a lock position switch
5
to detect whether the doors are locked or unlocked, and an intrusion detecting means
6
to detect unfair intrusion into a car.
The microcomputer
1
a
of the master
1
A and a microcomputer
2
a
of a slave
2
A are connected through a communication line
9
. A siren, for example, as the slave side has the microcomputer
2
a
to perform various types of control. An alarm generating circuit
11
is connected to an output terminal of the microcomputer
2
a
. The alarm generating circuit
11
sounds an alarm based on a detected signal from the intrusion detecting means
6
. An ignition detecting circuit
12
is connected to an input terminal of the microcomputer
2
a
, and an ignition key switch
13
is connected through a signal wiring
14
to the ignition detecting circuit
12
. One end of an auxiliary battery
15
is connected to the microcomputer
2
a
in order to inform the charge state, while to the other end thereof, a main battery
7
is connected through a switch circuit
16
and a feeder line
8
. The main battery
7
is connected through the feeder line
8
to both the microcomputer
1
a
of the master
1
A and the microcomputer
2
a
of the slave
2
A.
Charging of the auxiliary battery
15
mounted on the siren as the slave
2
A in the above construction has been conducted as follows.
In the slave
2
A, an ON/OFF signal of the ignition key switch
13
is captured through the signal wiring
14
by the ignition detecting circuit
12
, which then outputs the detected signal to the microcomputer
2
a
. When the ignition key switch
13
is judged to be ON, the microcomputer
2
a
judges the engine to be in action and sends a signal for making the switch circuit
16
, comprising a switching element such as a transistor, ON to the switch circuit
16
in order to charge the auxiliary battery
15
. When the switch circuit
16
becomes ON, the charge of the auxiliary battery
15
is carried out by the main battery
7
through the feeder line
8
.
On the other hand, when the ignition key switch
13
is judged to be OFF, the microcomputer
2
a
does not judge the engine to be in action and sends a signal for making the switch circuit
16
OFF to the switch circuit
16
in order to inhibit the charge of the auxiliary battery
15
. When the switch circuit
16
becomes OFF, the charge of the auxiliary battery
15
by the main battery
7
through the feeder line
8
is inhibited. As described above, the charging of the auxiliary battery
15
has been performed based on the ON/OFF state of the ignition key switch
13
directly detected by the slave
2
A.
In the above-described conventional battery charge and discharge system, the signal wiring
14
for capturing the ON/OFF signal from the ignition key switch
13
on the slave side is required. In addition, the slave side is required to have the detecting circuit
12
for detecting the ON/OFF state of the ignition key switch
13
. Therefore, the count of components constituting the slave is large, resulting in a high cost.
DISCLOSURE OF INVENTION
The present invention was developed in order to solve the above problem, and it is an object of the present invention to provide a battery charge and discharge system, wherein instead of making a slave directly judge the permission/inhibition of charging of an auxiliary battery mounted on the slave, the charging of the auxiliary battery is carried out through the use of a communication means between a master and the slave, so that the count of components such as a signal wiring and a detecting circuit can be reduced, leading to a reduction in cost.
In order to achieve the above object, a battery charge and discharge system (
1
) according to the present invention is characterized by a battery charge and discharge system controlling the charge and discharge of an auxiliary battery installed separately from a main battery, wherein a master and a slave with the auxiliary battery mounted thereon are communicably connected, the system comprising a first judging means to judge whether or not the master is in sleep mode, a charge inhibit means to inhibit the charging of the auxiliary battery of the slave when the first judging means judges the master to be in sleep mode, and a charge permit means to permit the charging of the auxiliary battery of the slave when the first judging means does not judge the master to be in sleep mode.
Using the above battery charge and discharge system (
1
), the slave can control the permission/inhibition of the charging of the auxiliary battery based on the judgment of whether or not the master is in sleep mode. Therefore, a signal wiring and a signal detecting circuit component for detecting signals, conventionally required for directly judging the state of an ignition key switch on the slave side, become needless, so that the count of components constituting the system can be decreased, resulting in a cost reduction.
A battery charge and discharge system (
2
) according to the present invention is characterized by a battery charge and discharge system controlling the charge and discharge of an auxiliary battery installed separately from a main battery, wherein a master and a slave with the auxiliary battery mounted thereon are communicably connected, the system comprising a second judging means to judge whether or not the sleep conditions of the master are satisfied, a charge inhibit means to inhibit the charging of the auxiliary battery of the slave when the second judging means judges the sleep conditions of the master to be satisfied, and a charge permit means to permit the charging of the auxiliary battery of the slave when the second judging means does not judge the sleep conditions of the master to be satisfied.
Using the above battery charge and discharge system (
2
), the slave can control the permission/inhibition of the charging of the auxiliary battery based on the judgment of whether or not the sleep conditions of the master are satisfied. Therefore, a signal wiring and a signal detecting circuit component for detecting signals, conventionally required for directly judging the state of an ignition key switch on the slave side, become needless, so that the count of components constituting the system can be decreased, resulting in a cost reduction. Moreover, the charge can be inhibited at an earlier timing before the master goes into sleep mode, and at the wake-up time of the master, the charging of the auxiliary battery is not permitted until an operation condition such as an event occurs. As a result, the power consumption of the main battery can be reduced.
A battery charge and discharge system (
3
) according to the present invention is characterized by a battery charge and discharge system controlling the charge and discharge of an auxiliary battery installed separately from a main battery, wherein a master and multiple nodes are connected through a communication line, and the master and a slave with the auxiliary battery mounted thereon are communicably connected, the system comprising a third judging means to judge whether or not at least one of the nodes is in sleep mode, a charge inhibit means to inhibit the chargin
Fujitsu Ten Limited
Tso Edward H.
Wenderoth , Lind & Ponack, L.L.P.
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