JP3489438B2 - Battery pack - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power pack containing a (continuous control) power supply device for supplying power to mobile phones, portable radios and the like used in explosion-proof areas such as chemical plants and power plants. Regarding

[0002]

2. Description of the Prior Art FIG. 9 is a circuit diagram of a collector output DC type constant voltage power supply circuit as a conventional stabilized power supply device disclosed in Japanese Patent Laid-Open No. 55-78314. In this power supply circuit, an unstabilized power supply circuit 101 such as an AC rectifier circuit and a load 1
The control transistor 103 is connected to the collector 10
3c is connected to the load 102 side.

Further, an error amplification transistor 104 for controlling the control transistor 103 is provided, and the collector 10
4c is the base 103b circuit of the control transistor 103, the emitter 104e is grounded via the resistor 105,
The base 104b is connected to the voltage dividing point of the voltage dividing resistor 107 for dividing the output voltage via the small resistance 106 for protection.

A constant voltage diode 108 for generating a reference voltage is connected between the emitter 104e circuit of the error amplification transistor 104 and the collector 103c circuit of the control transistor 103.

Further, between the base 104b circuit of the error amplifying transistor 104 and the collector 103c circuit of the controlling transistor 103, that is, the output circuit, a diode having a polarity such that it conducts when this output circuit is shorted to ground. 116 are connected.

Further, a ripple removing capacitor 109 is provided between the base 104b circuit of the error amplifying transistor 104 and the ground. Incidentally, 110 and 111 are smoothing capacitors, and 112 is a starting resistor.

Further, as a means for preventing the control transistor 103 from being destroyed when the output is short-circuited, the diode 116 forms a discharge path for the capacitor 109, and the collector 103c circuit of the control transistor 103 is connected to the line 1.
When it is short-circuited to the ground as shown by 13, the charge stored in the capacitor 109 until then is transferred to the diode 11
Discharge through 6.

In this way, the base 104b circuit of the error amplifying transistor 104 is grounded via the diode 116, and the error amplifying transistor 104 is cut off, whereby the control transistor 103 is also cut off and the collector current does not flow, and the output Protects the entire circuit from short circuits.

[0009]

The conventional power supply device having the above structure has the following problems. (1) The DC type constant voltage power supply circuit requires the diode 116 in order to prevent the control transistor 103 from being broken due to a short circuit on the output side, resulting in an increase in the number of parts.

(2) Further, protection of the control transistor 103 when an abnormal load close to a short circuit immediately before the diode 116 is turned on is connected to the output side is not considered.

(3) In addition, due to the increase in voltage on the input side,
The protection against the destruction of the control transistor 103 due to the increase of the output current and the collector loss with the increase of the base current of the control transistor 103 and the similar destruction due to the temperature change is not considered.

The present invention has been made in order to solve the above problems, and can protect the device by preventing element destruction due to a short circuit or an abnormal load, automatically performing a stabilizing operation, and reducing the size of the device. An object of the present invention is to provide a power pack having a power supply device capable of realizing the above.

[0013]

A battery pack according to the present invention is provided.
Is removably connected to the mobile phone,
A pond pack, comprising a rechargeable battery circuit and the portable phone
The output terminal electrically connected to the speaker and the battery circuit
The battery output output from the
The voltage control output circuit that outputs to the output terminal and the reference voltage
Reference voltage generating circuit for generating the reference voltage and the output
The control signal is output based on the battery output output to the terminal.
Voltage control signal generation circuit that generates the
And an operation control for controlling the operation of the voltage control signal generating circuit.
Control circuit and input signal from the outside of the battery pack.
And a control terminal for controlling the operation control circuit.
Whether or not voltage is applied to the control terminals from outside the battery pack
Of the battery output from the battery circuit to the output terminal
The output is shut off and the output terminal is opened.
Prevent the discharge of the battery circuit.

A battery circuit, a voltage control output circuit, a reference voltage generation circuit, a voltage control signal generation circuit, and an operation control circuit are integrated into a unit, and a plurality of these units are connected in series between the battery circuit and the output terminal. The plurality of operation control circuits are connected and the input signal is input from the same control terminal.

The voltage control output circuit is a parallel connection body of a first resistor and a pnp type bipolar transistor, and one end side of the first resistor is in the emitter region of the pnp type bipolar transistor, and The other end side of the resistor is connected to the collector region of the pnp-type bipolar transistor, and the voltage control signal generating circuit is a connection body of the first npn-type bipolar transistor and the second to fourth resistors. , The emitter region of the first npn-type bipolar transistor is on one end side of the second resistor, and the base region of the first npn-type bipolar transistor is on one end side of the third and fourth resistors, respectively. The reference voltage generating circuit is a Zener diode connected to the cathode side of the Zener diode. The collector region of the p-type bipolar transistors are respectively connected to the anode side of the Zener diode to the emitter region of said first npn type bipolar transistor, further, the first n
The collector region of the pn-type bipolar transistor is set to p
The emitter region of the first npn-type bipolar transistor is connected to the base region of the np-type bipolar transistor, and the emitter region of the pnp-type bipolar transistor is connected to each other, and the other end side of the third resistor is connected to the pnp-type bipolar transistor.
Is connected to the collector region of the second npn-type bipolar transistor, the operation control circuit is a connection body of the second npn-type bipolar transistor and the fifth resistor, and the collector region of the second npn-type bipolar transistor is The other end of the second resistor is connected to the second npn.
The base region of the bipolar transistor is connected to the control terminal via the fifth resistor.

The feedback circuit comprises a sixth resistor having one end connected to the emitter region of the pnp bipolar transistor and the other end connected to the emitter region of the first npn bipolar transistor.

Further, one end is connected to the emitter region of the pnp bipolar transistor and the other end is connected to the collector region of the pnp bipolar transistor.
A light emitting diode is provided which lights up when the p-bipolar transistor is off.

A temperature compensating element for compensating the temperature of the current amplification factor change due to heat of the pnp bipolar transistor is connected in series to the second resistor, and the temperature compensating element is connected to the feedback circuit.

The voltage control signal generating circuit is predetermined by the voltage control output circuit based on the comparison between the reference voltage and the battery output when the output terminal is short-circuited or a low load is connected to the output terminal. The control signal that causes the battery output below the specified output to be output to the output terminal is generated.

Further, the voltage control signal generation circuit generates a control signal for instantaneously bringing the output current and the output voltage of the battery output from the voltage control output circuit to zero or close to zero.

Further, the voltage control signal generation circuit generates a control signal for causing the voltage control output circuit to output a battery output higher than a predetermined output to the output terminal when the output terminal is opened.

Further, a feedback circuit for reducing the fluctuation of the battery output from the voltage control output circuit and keeping it at a constant value when the battery output becomes larger than a predetermined voltage is provided with the voltage control output circuit and the voltage control circuit. Provided between the control signal generating circuit.

Furthermore, a backflow prevention circuit is provided between the charging terminal for charging the battery circuit and the battery circuit,
The battery circuit and the backflow prevention circuit are integrated into a first unit, and the voltage control output circuit, the voltage control signal generation circuit, the reference voltage generation circuit, the feedback circuit, and the operation control circuit are integrated into a second unit. As a unit,
The first unit and the second unit are detachable.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. FIG. 1 is a circuit configuration diagram of the continuous control type power supply device shown in the first embodiment. The power supply device shown in FIG. 1 is a battery pack body 1
Housed inside. The battery pack body 1 can be freely carried,
In the explosion-proof area, it can be freely attached and detached as a battery pack that will be the power source for mobile phones and portable radios.

That is, when the battery in the battery pack is discharged to a level below the required output voltage, it can be easily replaced with another battery pack that has been charged as a spare battery.

As shown in FIG. 1, the battery pack body 1 is provided with a continuous control type power supply unit 4, a backflow prevention circuit 6, and a battery circuit 7 which constitute a continuous control type power supply device.

The battery pack body 1 also has a charging terminal 2
a, 2b, output terminals 3a, 3b, and control terminal 14 are provided. The output terminal of the continuous control type power supply unit 4 is connected to the output terminals 3a and 3b of the battery pack body 1 and shared.

The backflow prevention circuit 6 includes a backflow prevention diode D.
It consists of 1. The anode region of the backflow prevention diode D1 is connected to the charging input terminal 2a, and the cathode region thereof is connected to the input terminal 5a.

The battery circuit 7 can be charged and discharged by inputting a DC power supply voltage, and is composed of a plurality of batteries BT connected in series.

The anode side of the battery BT is connected to the cathode region of the backflow prevention diode D1 of the backflow prevention circuit 6 and the input terminal 5a, and the cathode side is connected to the charging input terminal 2b and the input terminal 5.
b respectively. The input terminal 5b is connected to the ground potential.

The continuous control type power supply unit 4 includes a voltage control output circuit 9 and a voltage comparison control circuit (voltage control signal generating circuit) 1.
0, a reference voltage generation circuit 11, a feedback circuit 12, and an operation control circuit 13.

The voltage control output circuit 9 can control and output the battery output discharged from the battery circuit 7 based on a control signal described later, and includes a pnp type bipolar transistor TR1 and a start bias resistor R1.

The emitter region of the bipolar transistor TR1 is connected to the input terminal 5a, the collector region is connected to the output terminal 3a, and the base region is connected to the voltage comparison control circuit 10.
Connected to.

The start bias resistor R1 has one end connected to the emitter region of the bipolar transistor TR1 and the other end connected to the collector region of the bipolar transistor TR1.

The voltage comparison control circuit 10 outputs the output terminal 3 based on the comparison between the battery output output from the voltage control output circuit 9 and the reference voltage output from the reference voltage generation circuit 11.
When the load 8 in the normal region is connected to a, the voltage control output circuit 9 causes the output terminal 3a to output a constant battery output equal to or higher than a predetermined output, and when the output terminal 3a is short-circuited or output. When an abnormal load is connected to the terminal 3a, the voltage control output circuit 9 generates a control signal for outputting a constant battery output below a predetermined output to the output terminal 3a. A bipolar transistor TR2, output voltage detection resistors R3 and R4, and an output current setting resistor R2 are provided.

The collector region of the bipolar transistor TR2 is connected to the base region of the bipolar transistor TR1 of the voltage control output circuit 9, and the emitter region thereof is one end side of the output current setting resistor R2, the reference voltage generating circuit 11 and the feedback circuit 12. And the base region is connected to one end side of each of the output voltage detecting resistors R3 and R4.

The other end of the output voltage detecting resistor R3 is connected to the collector region of the bipolar transistor TR1 of the voltage control output circuit 9 and the output terminal 3a. The other end of the output voltage detecting resistor R4 is connected to the ground potential. The other end of the output current setting resistor R2 is connected to the operation control circuit 13.

The reference voltage generation circuit 11 generates a reference voltage and outputs it to the voltage comparison control circuit 10, and includes a Zener diode D2 which generates the reference voltage.

The cathode region of the Zener diode D2 is a bipolar transistor TR of the voltage control output circuit 9.
1 is connected to the collector region, and the anode region is connected to the emitter region of the bipolar transistor TR2 of the voltage comparison control circuit 10 and one end side of the output current setting resistor R2.

The feedback circuit 12 reduces the fluctuation of the battery output and controls it to a constant value when the battery output fluctuates more than a predetermined voltage, and includes a resistor R5.

One end of the resistor R5 is connected to the voltage control output circuit 9
Is connected to the emitter region of the bipolar transistor TR1 and one end of the start bias resistor R1 and is connected to the resistor R5.
The other end side of the base region of the bipolar transistor TR1 of the voltage control output circuit 9, the anode region of the Zener diode D2 of the reference voltage generation circuit 11, the emitter region of the bipolar transistor TR2 of the voltage comparison control circuit 10, and the output current setting resistor. Each is connected to one end of R2.

The operation control circuit 13 has, for example, the output terminal 3
It is possible to reduce the power consumed by this power supply device when the load 8 is not connected to a, and is provided with an npn-type bipolar transistor TR3 that performs a switch operation and a resistor R7.

The collector region of the bipolar transistor TR3 has an output current setting resistor R of the voltage comparison control circuit 10.
2 is connected to the other end side, the emitter region is connected to the ground potential, and the base region is connected to one end side of the resistor R7. The other end of the resistor R7 is connected to the control terminal 14.

A load 8 is connected between the output terminals 3a and 3b of the battery pack body 1 as a continuous control type power supply device having the above circuit configuration.

In FIG. 1, reference numeral I indicates a load 8 from the output terminal 3a.
Is the output current flowing through. Reference symbol V indicates output terminals 3a and 3b
It is the output voltage generated between and. The output current I and the output voltage V are both battery outputs output from the battery pack body 1.

FIG. 2 shows the output terminal 3a of the battery pack body 1,
FIG. 3 is a current-voltage output characteristic diagram of a battery output output from 3b.

In FIG. 2, the horizontal axis represents the output current (A) and the vertical axis represents the output voltage (V). The battery output 15 changes depending on the size of the load 8 connected to the output terminals 3a and 3b of the battery pack body 1, and also changes depending on the remaining battery capacity of the battery BT of the battery circuit 7 incorporated in the battery pack body 1. .

The point A on the battery output 15 is the output terminal 3a,
3b shows a position where the load 8 is not connected. Point B is
The intersection of the required voltage required for the battery output supplied from the battery pack body 1 and the battery output 15 is shown. The range from point A to point B is a normal load region in which an output voltage higher than the required voltage can be obtained even if the load 8 changes.

Point C on the battery output 15 indicates the position of the yield point. The point D is an approximation of a point where the output current and the output voltage are infinite from the yield point C, passing through the yield point C, and becoming almost zero.

At point D, the bipolar transistor TR1 of the voltage control output circuit 9 is controlled to the OFF state and the output terminal 3
The position where the battery output is not output is shown in a. Point C to point D
The range up to is a short circuit or low load region where the output terminals 3a and 3b are short-circuited or a low load (abnormal load) is connected.

In the continuous control type power supply device configured as described above, when a normal load (appropriate load) is connected between the output terminals 3a and 3b of the battery pack body 1, the charging terminals 2a and 2b are connected to each other. When the battery BT of the battery circuit 7 is charged, a normal bias is applied to the voltage comparison control circuit 10.

That is, first, the battery output (output voltage V) output from the voltage control output circuit 9 to the output terminal 3a is detected by the voltage comparison control circuit 10, and the detected battery output and the reference voltage generation circuit 11 are generated. The voltage comparison control circuit 10 compares the generated reference voltage.

As will be described later, in this case, the change in the output voltage V is caused by the output voltage detecting resistor R of the voltage comparison control circuit 10.
At 2 and R3, it is detected as a change in the battery output.

While the bipolar transistor TR2 of the voltage comparison control circuit 10 is applied with the forward bias with respect to the reference voltage, the bipolar transistor TR2 is turned on.
Operation can be maintained.

Therefore, a base current flows as a control signal to the bipolar transistor TR1 of the voltage control output circuit 9 and a forward bias is applied, and the ON operation of the bipolar transistor TR1 can be maintained. A battery output (output current I) corresponding to 8 can be output.

When the normal (appropriate) load 8 is thus connected between the output terminals 3a and 3b, the battery output 15 is in the normal load region (between points A and B) as shown in FIG. )
It is within the range, and a voltage higher than the required voltage can be secured.

On the other hand, the output terminal 3a of the battery pack body 1,
When a short circuit occurs between 3b or when an extremely low additional load (abnormal load) 8 is connected between the output terminals 3a and 3b, the battery output (output voltage V output from the voltage control output circuit 9 to the output terminal 3a). ) Is reduced.

This battery output is detected by the voltage comparison control circuit 10 as described above, and the detected battery output and the reference voltage generated by the reference voltage generation circuit 11 are compared by the voltage comparison control circuit 10.

As will be described later, in this case, the change in the output voltage V is caused by the output voltage detecting resistor R of the voltage comparison control circuit 10.
At 2 and R3, it is detected as a change in the battery output.

When the base voltage of the bipolar transistor TR2 of the voltage comparison control circuit 10 reaches a state where it becomes substantially equal to this reference voltage, the bipolar transistor TR2.
The base current of 2 hardly flows, and the bipolar transistor TR2 is turned off.

Therefore, the base current as a control signal does not flow in the bipolar transistor TR1 of the voltage control output circuit 9, and the bipolar transistor TR1 is turned off, so that the battery output (output voltage V) is output from the voltage control output circuit 9. No output is made and a battery output (output voltage V) cannot be obtained from the output terminal 3a.

In this case, as shown in FIG. 2, the battery output 1
5 is in the range of the short circuit or the low load region, the output current I and the output voltage V are both substantially zero, and this state is maintained.

Further, when the short-circuited state between the output terminals 3a and 3b is released, or when the low load 8 is removed from between the output terminals 3a and 3b and the normal load 8 is connected between the output terminals 3a and 3b. , Can be automatically restored to normal operation.

Therefore, when the load 8 is removed from between the output terminals 3a and 3b, both the current and the voltage instantly become as close to zero as possible, and the state is maintained.
By removing the, it is possible to instantly return to the state in which the required battery output can be obtained.

The detailed circuit operation of the continuous control type power supply device configured as described above will be further described with reference to FIGS. 1 and 2. However, the control terminal 14 is in a state in which a positive voltage is applied and the operation control circuit 13 is turned on.

(1) Charging Operation to Battery BT First, in this continuous control type power supply device, DC power is input from the charging terminals 2a and 2b of the battery pack body 1, and the backflow prevention diode of the backflow prevention circuit 6 is supplied. The battery BT of the battery circuit 7 is charged via D1. The electric power charged in the battery BT is the input terminal 5 of the continuous control type power supply unit 4.
It is applied between a and 5b.

(2) Operation when the load 8 is not connected between the output terminals 3a and 3b When the load 8 is not connected between the output terminals 3a and 3b of the battery pack body 1, input is made to the input terminal 5a. The generated power is output to the output terminal 3a via the start bias resistor R1 of the voltage control output circuit 9.

Since the load 8 is not connected between the output terminals 3a and 3b, in this case, the output voltage detecting resistors R3 and R2 of the voltage comparison control circuit 10, the base region and the emitter region of the bipolar transistor TR2, and the reference voltage. A small amount of current flows to the ground potential through each of the cathode region and the anode region of the Zener diode D2 of the generation circuit 11.

As a result, the bipolar transistor TR2 of the voltage comparison control circuit 10 is turned on, the bipolar transistor TR1 of the voltage control output circuit 9 is turned on, and the output current at the position of the point A of the battery output 15 as shown in FIG. I and the output voltage V are obtained.

The maximum value of the output voltage V in this case is
It is determined by the ratio between the Zener voltage of the Zener diode D2 of the reference voltage generating circuit 11 and the output voltage detecting resistors R3 and R4.

(3) Operation when load 8 in the normal load region is connected between output terminals 3a and 3b Battery pack body 1
When a load 8 in a normal load area (area between points A and B) is connected between the output terminals 3a and 3b of the input terminal 5a,
The power applied between 5b is output to the output terminal 3a via the emitter region and collector region of the bipolar transistor TR1 of the voltage control output circuit 9.

In this case, the output current I of the battery output is determined by the current in the base region of the bipolar transistor TR1 of the voltage control output circuit 9 determined by the output voltage detecting resistor R2.

That is, when the maximum value of the output current I is the current amplification factor times that of the bipolar transistor TR1, and the output current due to the load is within the range of the current amplification factor times the current in the base region of the bipolar transistor TR1, As shown in FIG. 2, the output current I and the output voltage V of the battery output 15 in the range from the point A to the point B are obtained.

(4) Operation when the load 8 connected between the output terminals 3a and 3b has a value lower than the normal load region (a low load is connected) The output terminals 3a and 3b of the battery pack body 1 When the load 8 connected in between has a value lower than that in the normal load region (a low load is connected), the output current I changes to the voltage control output circuit 9
Exceeds the current setting value of the bipolar transistor TR1 of
A voltage drop occurs between the emitter region and the collector region of the bipolar transistor TR1 and the output voltage V becomes low.

In this case, the change in the output voltage V is detected by the output voltage detecting resistors R3 and R2 of the voltage comparison control circuit 10 as a change in the battery output, and the voltage comparison control circuit 10 is detected.
Zener diode D of the reference voltage generation circuit 11 at
Compared with a Zener voltage of 2.

Then, it is always higher than the Zener voltage of the Zener diode D2, that is, the load 8 is in the normal load region (points A to
Area between points B), abnormal load area (area between points C and D)
To be monitored.

(5) Operation when the load 8 connected between the output terminals 3a and 3b becomes a low load or a state close to a short circuit Furthermore, the load connected between the output terminals 3a and 3b of the battery pack body 1 When 8 is in a state of low load or close to a short circuit, the output voltage V between the output terminals 3a and 3b becomes substantially zero and the output current I also becomes substantially zero.

This change in the battery output is detected as a change in the battery output by the output voltage detecting resistors R3 and R2 of the voltage comparison control circuit 10 in the same manner as described above, and the voltage comparison control circuit 10 causes the Zener of the reference voltage generation circuit 11 to change. It is compared with the Zener voltage of the diode D2.

When the detected change in the battery output is equal to or lower than the Zener voltage of the Zener diode D2, the base current of the bipolar transistor TR2 of the voltage comparison control circuit 10 becomes close to zero and the bipolar transistor TR2 becomes
2 is turned off.

Therefore, since the base current as the control signal does not flow in the bipolar transistor TR1 of the voltage control output circuit 9 and the bipolar transistor TR1 is turned off, the voltage control output circuit 9 does not output the battery output, The output voltage V between the terminals 3a and 3b becomes zero or near zero, and the output current I also becomes zero or near zero.

That is, in the current-voltage characteristic of the battery output output from the voltage control output circuit 9, the voltage gradually decreases as the current increases above the required battery output, and both the current and the voltage instantaneously decrease below the required battery output. Is maintained at or near zero.

This change in the battery output corresponds to the battery output 1 in FIG.
There is a rapid change from point C to point D on 5.

When a low load between the output terminals 3a and 3b or a state close to a short circuit is resolved, or when a normal load is connected between the output terminals 3a and 3b, normal operation in the normal load region described above is performed. It can be restored automatically.

That is, the low load between the output terminals 3a and 3b or a state close to a short circuit is resolved, a normal load is connected, the stabilization operation is automatically restored, and maintenance is simplified.

In this way, when the output terminals 3a and 3b of the continuous control type power supply device are short-circuited or the output terminals 3a and 3b are short-circuited.
If an abnormally low load is connected between b, output terminal 3a
An abnormal output current does not flow, and the output voltage V between the output terminals 3a and 3b becomes zero or near zero, so that the output power (output power P = output current I × output voltage V) also becomes zero or near zero. .

Therefore, it is possible to avoid a short circuit such as damage due to overheating of the load 8 and element destruction due to an abnormal load, and to avoid damage to the continuous control type power supply device itself.

Further, with such a simple circuit structure, the device can be made compact.

Although the backflow prevention circuit 6, the battery circuit 7 and the continuous control type power supply unit 4 are incorporated in the battery pack body 1 in the first embodiment, the continuous control type power supply device has been described. Backflow prevention circuit 6 and battery circuit 7
It is possible to configure the continuous control type power supply device of the present invention by configuring the battery circuit device as a battery circuit unit and combining the battery circuit unit with the continuous control type power supply unit 4 so as to be detachable from each other.

In this case, maintenance can be easily performed by adopting a structure in which they can be attached to and removed from each other.

As described above, according to the first embodiment, first, the battery output output from the voltage control output circuit 9 of the continuous control type power supply device to the output terminals 3a and 3b and the reference voltage of the reference voltage generating circuit 11 are output. And are compared.

Next, when the output terminals 3a and 3b are short-circuited or when an abnormally low load is connected between the output terminals 3a and 3b, the battery output and the reference voltage generating circuit 11 which change due to the short-circuiting or the abnormal load. Is compared with the reference voltage of (1) in the voltage control comparison circuit 10, and the compared voltage difference can be fed back to the voltage control output circuit 9 as a control voltage via the feedback circuit 12.

The voltage control output circuit 9 controls the battery output on the basis of the control voltage, and the output terminal 3a outputs a reduced battery output below the required battery output.

Therefore, firstly, the load 8 connected between the output terminals 3a and 3b does not become overheated, so that the load 8 connected between the continuous control type power supply device and the output terminals 3a and 3b is damaged. The destruction can be prevented, and both the continuous control type power supply device and the load 8 can be protected.

Secondly, since the voltage control output circuit 9 can automatically control the battery output by the control voltage generated in the voltage comparison control circuit 10 based on the battery output according to the change in the battery output, A continuous control type power supply device with high control accuracy can be realized.

When the output terminals 3a and 3b are short-circuited or an abnormally low load is connected between the output terminals 3a and 3b, almost no current flows between the output terminals 3a and 3b, and the voltage is low. Since it does not occur, overheating of the circuit, especially the voltage control output circuit 9, can be prevented, and both the continuous control type power supply device and the load 8 can be protected.

When the load 8 between the output terminals 3a and 3b is opened, the output can be automatically restored, and the output terminal 3
To facilitate the recovery work in the event of an accident such as a short circuit between a and 3b.

From the control terminal 14 to the operation control circuit 13
Depending on the presence or absence of a signal input (application of a positive voltage) to the output terminals 3a and 3b, the output of the continuous control type power supply unit is forcibly cut off regardless of the open state of the load 8 and self-consumption current Of the load 8 between the output terminals 3a and 3b can be controlled.
The battery circuit can be prevented from being discharged when the battery is opened.

Further, the battery circuit 7, the voltage control output circuit 9,
The reference voltage generation circuit 11, the voltage comparison control circuit 10, the feedback circuit 12, and the operation control circuit 13 are integrally housed as a battery pack 1 so that the battery pack 1 can be carried, so that the power supply device can be downsized.

Embodiment 2. FIG. 3 is a circuit configuration diagram of the continuous control type power supply device shown in the second embodiment. In the continuous control type power supply device shown in FIG. 3, the voltage comparison control circuit 10 includes a temperature compensation element T having a positive temperature characteristic.

One end of the temperature compensating element T is the emitter region of the bipolar transistor TR2, and the reference voltage generating circuit 11 is provided.
Zener diode D2 anode region, feedback circuit 1
Each of the two resistors R5 is connected to the other end side thereof, and the other end side thereof is connected to the collector region of the bipolar transistor TR3 of the operation control circuit 13.

In the continuous control type power supply device having such a configuration, in the temperature compensating element T, the change of the current amplification factor due to the temperature of the bipolar transistor TR1 of the voltage control output circuit 9 is suppressed. That is, there is an effect that a stable output current I can be obtained with respect to a change in temperature.

As described above, according to the second embodiment, n
The emitter region of the pn-type bipolar transistor TR2 and the output voltage detecting resistor R2 connected to the reference voltage generating circuit 11 and the feedback circuit 12 are positively temperature-compensated for a change in current amplification factor due to heat of the pnp-type bipolar transistor TR1. The temperature compensating element T having the temperature characteristic of is connected.

As a result, the temperature compensating element T can perform temperature compensation of the current amplification factor in the pnp type bipolar transistor TR1 of the voltage control output circuit 9, so that a constant battery output can be obtained without being affected by temperature changes. To be

Third embodiment. FIG. 4 is a circuit configuration diagram of the continuous control type power supply device shown in the third embodiment. The continuous control type power supply device shown in FIG. 4 includes a bimetal switch (polyswitch) S in the battery circuit 7.

The bimetal switch S is electrically connected in series between a plurality of battery circuits BT connected in series in the battery circuit 7.

In the continuous control type power supply device having such a configuration, in the bimetal switch S, when the temperature of the battery circuit 7 rises above a certain temperature, the battery BT is cut off and the battery circuit 7 is charged. The discharge operation is stopped, and the abnormal temperature rise of the battery circuit 7 can be prevented.

On the contrary, in the bimetal switch S, when the temperature of the battery circuit 7 is lower than a specific temperature, the connection between the batteries BT is automatically restored, and the charging operation and the discharging operation of the battery circuit 7 are performed. Both recover.

That is, the bimetal switch S has an effect of preventing damage to the battery circuit 7 during abnormal charging and damage due to abnormal overheating of the voltage control output circuit 9, the load 8 and the like.

As described above, according to the third embodiment, the battery circuit 7 is composed of a plurality of batteries BT connected in series, and the battery circuit 7 is kept at a specific temperature between the plurality of batteries BT of the battery circuit 7. A bimetal switch (poly switch) S is provided which can disconnect the connection between the batteries BT when the temperature rises and restore the connection between the batteries when the temperature drops to a specific temperature.

As a result, the bimetal switch (poly switch) S can prevent an abnormal temperature rise of the battery circuit 7, and when a specific temperature is reached, the current flowing to the power supply device and the battery output flowing to the load are both cut off. it can. Therefore, the continuous control type power supply and the load 8 can be prevented from being damaged by abnormal overheating.

Fourth Embodiment FIG. 5 is a circuit configuration diagram of the continuous control power supply device shown in the fourth embodiment. The continuous control type power supply device shown in FIG. 5 includes not only the backflow prevention circuit 6 between the charging output terminal 2a and the battery circuit 7, but also the backflow prevention circuit 16 between the output terminal 3a and the battery circuit 7. Equipped with.

The backflow prevention circuit 16 similarly includes a backflow prevention diode D3, the cathode region of which is connected to the battery circuit 7, and the anode region of which is connected to the output terminal 3a.

In the continuous control type power supply device configured as described above, in the backflow prevention circuit 6, the charging input terminals 2a, 2b are provided.
From this, the battery circuit 7 can be charged, and in addition, in the backflow prevention circuit 16, the battery circuit 7 can be charged from the output terminal 3a.

That is, in the continuous control type power supply circuit shown in FIG. 5, there is an effect that charging can be performed from both the charging input terminals 2a and 2b and the output terminal 3a.

The battery output from the voltage control output circuit 9 is output to the output terminal 3a as in the case of the continuous control type power supply device described in the above-mentioned embodiment.

As described above, according to the fourth embodiment, the backflow prevention circuit 16 is provided between the battery circuit 7 and the output terminal 3a.
By providing the backflow prevention circuit 6 capable of charging the battery circuit 7 between the battery circuit 7 and the charging terminal 2a, the battery circuit 7 is charged from two or more terminals of the output terminal 3a or the charging terminal 2a. Therefore, the battery circuit can be protected from an electrical short circuit of a plurality of charging terminals.

Embodiment 5. FIG. 6 is a circuit configuration diagram of the continuous control type power supply device shown in the fifth embodiment. The continuous control power supply device shown in FIG. 6 includes a voltage adjustment diode D4 in the reference voltage generation circuit 11.

The cathode region of the voltage adjusting diode D4 is the anode region of the Zener diode D2, and the cathode region is the bipolar transistor T of the voltage comparison control circuit 10.
It is connected to the emitter region of R2 and one end of the output current setting resistor R2.

In FIG. 6, the voltage adjusting diode D4 is used.
However, a plurality of them can be connected in series if necessary.

In the continuous control type power supply device having such a configuration, the voltage adjusting diode D4 usually has a threshold voltage (about 0.6 V in the case of Si semiconductor). The reference voltage can be adjusted. When the voltage adjusting diode D4 is connected in series, the reference voltage is determined by the sum of the threshold voltages.

That is, there is an effect that the reference voltage can be finely adjusted by the sum of the combination with the diode other than the voltage of the Zener diode.

As described above, according to the fifth embodiment, reference voltage generating circuit 11 controls the reference voltage based on the sum of the threshold voltages of a plurality of diodes connected in series. The reference voltage generated by can be adjusted.

Sixth Embodiment FIG. 7 is a circuit configuration diagram of the continuous control power supply device shown in the sixth embodiment. In the continuous control power supply device shown in FIG. 7, the display circuit 17 is mounted on the battery pack body 1. The display circuit 17 comprises a light emitting diode D5 and a resistor R6 of a display.

The cathode region of the light emitting diode is connected to the collector region of the bipolar transistor TR1 of the voltage control output circuit 9, and the anode region is connected to one end of the resistor R6. The other end of the resistor R5 is connected to the emitter region of the bipolar transistor TR1.

In the continuous control type power supply device configured as described above, the load 8 in the display circuit 17 becomes a low load or a state close to a short circuit, and when the bipolar transistor TR1 in the abnormal load region is OFF, the emitter region and the collector region are in the OFF state. It lights up with the voltage generated between them.

As described above, according to the sixth embodiment, by lighting the display circuit 17, it is possible to display the state of the continuous control type power supply device, for example, the cutoff state.

Seventh Embodiment FIG. 8 is a circuit configuration diagram of the continuous control power supply device shown in the seventh embodiment. The continuous control power supply device shown in FIG. 8 includes a plurality (two stages in FIG. 8) of backflow prevention circuits 6 connected in series, and a plurality of (two stages in FIG. 8) voltage control circuits 9 connected in series. Prepare

The continuous control type power supply device thus configured has the effect of improving redundancy.

The present invention is not limited to the embodiment described above. For example, in the present invention, the same effect can be obtained by combining the continuous control type power supply devices described in the first to seventh embodiments.

[0130]

According to the present invention, a continuous control type power supply which prevents overheating of an element due to a short circuit or an abnormal load, protects the device, automatically performs a stabilizing operation, and realizes miniaturization of the device. A power pack having a circuit can be provided.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a continuous control type power supply device shown in a first embodiment.

FIG. 2 is a current-voltage characteristic diagram of a continuous control type power supply device.

FIG. 3 is a circuit configuration diagram of a continuous control type power supply device shown in a second embodiment.

FIG. 4 is a circuit configuration diagram of a continuous control type power supply device shown in a third embodiment.

FIG. 5 is a circuit configuration diagram of a continuous control type power supply device shown in a fourth embodiment.

FIG. 6 is a circuit configuration diagram of a continuous control type power supply device shown in a fifth embodiment.

FIG. 7 is a circuit configuration diagram of a continuous control type power supply device according to a sixth embodiment.

FIG. 8 is a circuit configuration diagram of a continuous control type power supply device shown in a seventh embodiment.

FIG. 9 is a circuit configuration diagram of a conventional stabilized power supply device.

[Explanation of symbols]

1 Battery pack body, 2a, 2b Charging terminals, 3a, 3
b output terminal, 4 continuous control type power supply unit, 5a, 5
b input terminal, 6 backflow prevention circuit, 7 battery circuit, 8
Load, 9 voltage control output circuit, 10 voltage comparison control circuit (voltage control signal generation circuit), 11 reference voltage generation circuit, 12 feedback circuit, 13 operation control circuit, 14 control terminal, 16 backflow prevention circuit, BT battery, D1, D3
Backflow prevention diode, D2 Zener diode, D
4 Voltage adjustment diode, D5 light emitting diode, R
1 Start bias resistance, R2 output current setting resistance, R3, R4 output voltage detection resistance, R5-R6 resistance, S bimetal switch (poly switch), T temperature compensation element, TR1 pnp type bipolar transistor, TR2, TR3 npn type Bipolar transistor.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-9-230950 (JP, A) JP-A-5-299123 (JP, A) Actually open Sho-56-19813 (JP, U) Actual-open Sho-51- 89130 (JP, U) Actual development Sho 54-92337 (JP, U) Actual public Sho 46-31085 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) G05F 1 / 445,1 / 56,1 / 613,1 / 618 H02J 7/00-7/12 H02J 7/34-7/36 H02J 9/00-11/00

Claims (11)

(57) [Claims] 1. A mobile phone which is detachably connected to a mobile phone.
A flexible battery pack, a rechargeable battery circuit, an output terminal electrically connected to the mobile phone , and a battery output output from the battery circuit based on a control signal to control the output terminal. A voltage control output circuit that outputs a control signal, a reference voltage generation circuit that generates a reference voltage, and a voltage control signal generation circuit that generates the control signal based on the reference voltage and the battery output output to the output terminal. An operation control circuit for controlling the operation of the voltage control signal generation circuit based on an input signal; and a control terminal for inputting the input signal from outside the battery pack , the operation control circuit
Is a voltage applied from the outside of the battery pack to the control terminal.
By nothing, the battery from the battery circuit to the output terminal
The output is controlled to shut off and the output terminal is opened.
A battery pack for preventing discharge of the battery circuit during operation . 2. A battery circuit, a voltage control output circuit, a reference voltage generation circuit, a voltage control signal generation circuit, and an operation control circuit are integrated into a unit, and a plurality of the units are connected in series between the battery circuit and the output terminal. The battery pack according to claim 1 , wherein the battery pack is connected and a plurality of operation control circuits receives the input signal from the same control terminal. 3. The voltage control output circuit includes a first resistor and a pn.
A parallel connection body with a p-type bipolar transistor,
One end of the first resistor is connected to the emitter region of the pnp-type bipolar transistor, and the other end of the first resistor is connected to the collector region of the pnp-type bipolar transistor. A connection body of one npn-type bipolar transistor and second to fourth resistors, wherein an emitter region of the first npn-type bipolar transistor is located at one end side of the second resistor and is connected to the first npn-type transistor. The base region of the bipolar transistor is connected to one end of each of the third and fourth resistors, and the reference voltage generating circuit is a Zener diode, and the cathode side of the Zener diode is the pnp-type bipolar transistor. The anode side of the Zener diode to the collector region of the first npn-type bipolar transistor. Are respectively connected to the emitter region of the over La transistors, further, the collector region of said first npn type bipolar transistor in the base region of the pnp bipolar transistor, the first n
The emitter region of the pn-type bipolar transistor is defined as p
each of which is connected to the emitter region of the np type bipolar transistor, and the other end side of the third resistor is connected to the collector region of the pnp type bipolar transistor,
The operation control circuit is a connection body of a second npn-type bipolar transistor and a fifth resistor,
A collector region of the pn-type bipolar transistor is connected to the other end side of the second resistor, and a base region of the second npn-type bipolar transistor is connected to the control terminal via the fifth resistor. The battery pack according to claim 1 or 2 . 4. A feedback circuit comprising a sixth resistor having one end connected to the emitter region of the pnp bipolar transistor and the other end connected to the emitter region of the first npn bipolar transistor. The battery pack according to claim 3 . 5. A light emitting diode having one end connected to an emitter region of the pnp bipolar transistor and the other end connected to a collector region of the pnp bipolar transistor, the light emitting diode being turned on when the pnp bipolar transistor is off. The battery pack according to claim 3 or 4 . 6. A temperature compensating element for temperature compensating for a current amplification factor change due to heat of a pnp type bipolar transistor is connected in series to the second resistor, and the temperature compensating element is connected to the feedback circuit. The battery pack according to claim 4 , wherein 7. The voltage control signal generation circuit is predetermined from the voltage control output circuit based on a comparison between a reference voltage and a battery output when the output terminal is short-circuited or a low load is connected to the output terminal. The battery pack according to any one of claims 1 to 7 , wherein the battery pack outputs a control signal for outputting a battery output equal to or lower than the output to an output terminal. 8. A voltage control signal generating circuit according to claim, characterized in that for generating a control signal for closer the output current and the output voltage of the battery output from the voltage control output circuit to zero or zero instantaneously 1-7 The battery pack according to any one of 1. 9. The voltage control signal generation circuit generates a control signal that causes the voltage control output circuit to output a battery output higher than a predetermined output to the output terminal when the output terminal is opened. the battery pack according to any one of claims 1 to 8,. 10. A feedback circuit for reducing the fluctuation of the battery output from the voltage control output circuit to a constant value when the battery output becomes larger than a predetermined voltage, the voltage control output circuit and the voltage the battery pack according to any one of claims 1 to 9, characterized in that provided between the control signal generating circuit. 11. A backflow prevention circuit is provided between a charging terminal for charging the battery circuit and the battery circuit, the battery circuit and the backflow prevention circuit are integrated into a first unit, and the voltage control output is provided. A circuit, the voltage control signal generating circuit, the reference voltage generating circuit, the feedback circuit, and the operation control circuit are integrated into a second unit, and the first unit and the second unit are detachable. Item 10. The battery pack according to Item 10 .