JP2759768B2 - Small electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION The present invention relates to a charging circuit for a secondary battery.
Small electrical equipment, especially for detecting battery terminal voltage.
The present invention relates to a device for controlling the amount of charge by taking out. [0002] 2. Description of the Related Art Conventionally, this kind of charge amount control is used for a secondary battery.
The terminal voltage rises with charging,
Utilizing the fact that the terminal voltage decreases when approaching
When the peak voltage of the slave voltage or the voltage drops further by the specified voltage
It is common to detect the points and control the amount of charge.
Was. [0003] SUMMARY OF THE INVENTION However, this kind of
Rechargeable battery reaches its original full charge voltage after repeated charging
May not. Also, if the charging environment temperature is high,
Preset due to low drag and therefore low terminal voltage
May not be able to detect sufficient upper limit and not perform sufficient control
was there. In response to such inconveniences, the terminal voltage detection method
In addition to the steps, timer means are provided to detect the upper limit voltage.
If not, stop charging by timer
Also disclosed are those disclosed in, for example, Japanese Patent Application Laid-Open No. 62-1001.
No. 39). However, limited by this timer means
Since the charging time is constant, batteries that are almost fully charged
If charging is performed under conditions where it is difficult to detect
The charge amount control by the timer means works, possibly overcharging
There was a problem. [0004] The present invention has been made in view of the above problems.
Therefore, the charge amount is integrated in parallel with the detection of the terminal voltage.
In advance, the integrated value can be set without the terminal voltage reaching the upper limit.
When the charge reaches the fixed value, the charge
Charging that can prevent overcharging due to voltage detection failure
To provide small electrical equipment with means
You. [0005] SUMMARY OF THE INVENTION A small electric device according to the present invention.
The device has a secondary battery as shown in FIG.
Means for integrating the amount of charge for battery 6, and terminal for secondary battery 6
Means for detecting the voltage, and the detecting means presetElectricPressure
When a value is detectedFirstPerform charging regulation operationThe detection means
Before detecting the set voltage value,
Performs the second charging regulation operation when the value reaches the set value.Charge control
Means. In addition,First charge regulation action
Work is aboveFor accumulation meansThe charge is more regulated
On chargingIt is characterized by that. Note that the above-described charge control means performsSecond
The charging regulation operation is defined as trickle charging.Preferably. [0007] With this configuration, the secondary battery 6 can be charged easily.
, The charge amount is accumulated and stored in the accumulation means. here
so,Before the integrating means reaches the set value, the detecting means
When a value is detectedAnd the charging control means operates to
DoFirst charge regulationIn actionenter. This first charging regulation action
The charge of the crop is regulated by the accumulation means.What is done
Yes, after additional charge is performed by a predetermined amount,
finish.Conversely, before the detecting means detects the set voltage value
When the integrating means reaches the set value, the charging control means
The second charging regulation operation is started. [0008] According to the present invention, as described above, the terminal of the secondary battery 6 is provided.
In addition to the means of detecting the charging regulation time using the voltage change
A means for integrating the amount of charge of the secondary battery 6 is provided.
When the timing of power regulation is detected,
Charge amountcontrolConfigured to enter the regulated charging operation
Therefore, the battery voltage rise curve shows the environmental temperature and battery life.
Even if it changes, accurate full charge control is enabled. [0009] DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is an example in which the present invention is applied to an electric shaver.
The device will be described based on, but not limited to, only charging
Various small electric machines equipped with secondary battery charging means, including
Of course, it can be carried out in a vessel in substantially the same manner. An electric shaver 1 embodying the present invention is shown in FIG.
The outer blade 2 is detachably mounted on the upper part of the main body case 3 as shown in FIG.
Attach and slide the inner blade 4 inside the outer blade 2
Arrange freely. Furthermore, the inside of the main body case 3
A motor 5 for reciprocatingly driving the blade 4, and a rotary drive
A secondary battery 6 for supplying power for operation, and
Various controls such as charging control or motor rotation control
Is stored. In addition, of body case 3
A slide at the center of the front to regulate the timing of energizing the motor 5
A switch knob 9 of the type switch 8 is provided.
Whether the rotation of the motor 5 can be controlled below the step 9
Control display consisting of two light emitting diodes for displaying
Display corresponding to the charging / discharging state of the battery 10 and the secondary battery 6
Battery capacity indicator 11 consisting of six light emitting diodes
And are arranged. Furthermore, the lower end of the body case 3 has a tip
Power cord 13 with power plug 12
In addition to charging the secondary battery 6,
The motor 5 can be directly driven. FIG. 3 shows a case in which the main body case 3 is incorporated.
FIG. 2 is a block diagram schematically showing the entire electronic circuit 7,
100-240 V AC supplied from the commercial AC power supply 14
Inverter circuit 15 for converting a flowing voltage to a predetermined charging voltage
A power supply unit 16 for supplying power to the entire electronic circuit 7,
A rotation control unit 17 for controlling the rotation state of the motor 5;
A detector 18 for constantly detecting the operating state of the razor 1;
Based on various detection signals extracted from the detection unit 18
Output control of the inverter circuit 15 and the rechargeable battery 6
A central control unit 19 for controlling the display of the current capacity,
Control signal input from the detector 18 or the central controller 19
Output control that forcibly stops the oscillation of the inverter circuit 15
And the control unit 20. The power supply unit 16 is a power source capable of charging and discharging a plurality of times.
Main power supply with a secondary battery 6 such as a nickel-cadmium battery
Source 21 and the output voltage from the inverter circuit 15
The motor 5 and the electronic circuit
Power is supplied to the road 7. The motor 5 is connected to a main power supply 21 via a switch 8.
Power is supplied from the side and the rotation detection circuit 23 and
Of rotation control unit 17 including rotation and rotation control circuit 24
And the battery voltage fluctuation or the load applied to the motor 5
Approximately constant motor speed can be maintained regardless of
I am trying to. The central control unit 19 has a RAM 25 or R
A so-called integrated configuration of various peripheral circuits such as OM26
"One chip type microprocessor" is used,
It operates in synchronization with the input of the clock signal,
Various buses 29 are connected between the central processing unit 27 and the I / O device 28.
And the detection information output from the detection unit 18 is
Capable of capturing via an input port on the I / O device 28
In addition, such information is used as control data,
6 The control operation according to the program stored in
Inverter circuit 15 and indicator 10.1 from power port
1 to output a control signal. The detecting section 18 includes an AC input detecting circuit 30
The commercial AC power supply 14 is connected to the inverter circuit 15
The motor power supply detection circuit 31 determines whether or not the motor
It detects whether switch 8 is turned on or not, and
This is used as basic information for determining the operation mode of the razor 1. Further, the auxiliary power supply 22 is
Detects the output voltage Vs from the device and keeps the voltage Vs constant
By controlling the inverter circuit 15 to perform
Between 100-240V of commercial power supply voltage
Nevertheless, the output from the inverter circuit 15 is almost constant
Can be maintained. The rotation abnormality detection circuit 33 controls the motor 5
Motor 5 remains locked even though power is supplied
Is detected, and in such a case, the inverter circuit 15
Stop forcibly, and raise the temperature of inverter circuit 15
To prevent damage. Further, a load amount detection circuit 34 supplies the motor 5 with
The amount of current consumed by the motor
While the battery capacity display is relatively corrected, the upper limit voltage detection circuit 35
And the lower limit voltage detection circuit 36
Detects that the terminal voltage Vm has reached the upper limit or lower limit
Then, the value indicated on the battery capacity display 11 is absolutely supplemented by such detection.
I am trying to correct it. It should be noted that the secondary output detection circuit 32 and the rotation
The normal detection circuit 33 controls the output control unit 20 to output the detection signal.
Control signals S1 and S2, and the inverter circuit 15
Although direct control is performed, the central control unit 19
As a detection signal, the inverter control signal is sent through the central control unit 19.
It is also possible to control the output of the road 15 indirectly.
You. Referring to the electric circuit diagrams shown in FIGS.
Next, each configuration in FIG. 3 schematically shown above will be described more specifically.
Will be described. [0021] [Inverter circuit] The inverter circuit 15 is as shown in FIG.
And a diode bridge 37 and a filter 38.
A rectifier circuit 39 is provided on the input side,
Commercial AC power input via detachable power plug 12
14 is subjected to full-wave rectification by the rectifier circuit 39, and then the temperature fuse 4
0 is applied to the inverter circuit 15. The inverter circuit 15 is an output transistor
41, a primary coil 42 and the primary coil 4
Occurs when transistor 41 is off because it is connected to both ends of
And the shock absorber 43 that absorbs the shock voltage
Both have a feedback section 44 between the base and the emitter. Further
On the same core as the primary coil 42, the feedback coil 45, the output
The coil 46 and the tertiary coil 47 are wound. The feedback section 44 outputs one end of a feedback coil 45.
The feedback coil 45 is connected to the base end of the force transistor 41.
Between the other end of the transistor and the emitter of the output transistor 41
Connected to the output transistor 41.
Connect a diode 49 in the reverse direction between the mitter and base,
Emitter end to the positive side of secondary battery 6 via resistor 50
Connected. Further, the feedback coil 45 and the capacitor 48
At the connection point, the output voltage from the rectifier circuit 39 is connected to the resistor 51
The voltage divided at 52 can be applied via a resistor 53
I have. With the above configuration, the inverter circuit 15
A voltage is generated at both ends of the resistor 52 at the same time as the voltage is applied.
The charging of the capacitor 48 is started by the applied voltage. Con
As the voltage between both ends of the capacitor 48 rises, the output transistor 41
Of the transistor 41
Current flows through the primary coil 42 connected to the collector end of the
At first, the voltage of the feedback coil 45 is increased due to the increase of the current.
Occurs. This voltage is the base energy of transistor 41.
When the transistor 41 is turned on
At the same time, the capacitor 48 is rapidly charged in the opposite direction.
You. Here, the primary current is stabilized and the feedback coil
When the voltage between both ends of the capacitor 45 decreases, the charge
Current through diode 49 in the opposite direction
Flows, and the voltage across the diode 49 becomes a blocking voltage.
The output transistor 41 is rapidly turned off. Output transition
After the star 41 is turned off, the voltage output from the feedback coil 45 is
Selectively connected to the base end by voltage and diode 54
The capacitor 55 was rapidly discharged by the resistor 55.
And the voltage across the resistor 52 is again
Applied to the capacitor 48 to charge the capacitor 48 in the positive direction.
Then, the above on / off operation is repeated. A series of operations in the inverter circuit 15 described above
Of the primary coil when the output transistor 41 is turned on during the operation of
The energy stored on the side of the output transistor 4
The power is selectively extracted from the power supply unit 16 during the off period of one. [0027] [Power Supply Unit] The power supply unit 16 includes a main power supply 21 and an auxiliary power supply 22.
Consists of The main power supply 21 is arranged at the output end of the output coil 46.
The diversion diode 56 and the secondary battery 6 are connected.
Therefore, when the inverter circuit 15 is stopped, the secondary battery 6
When the inverter circuit 15 is operating, the output coil 46
These outputs are added to extract the voltage Vm.
Always enable operation. On the other hand, the auxiliary power supply 22
Rectifier diode 57 and large-capacity smoothing capacitor on the power side
The inverter circuit 15
The auxiliary voltage Vs is output only during operation, and
Supply drive power to each electronic circuit for controlling the circuit 15
I do. The tertiary coil 47 is connected to the output coil described above.
By setting the number of turns several times larger than
Output voltage higher than that of the
Although the inverter circuit 15 is operating from the power supply 22,
Because the inverter circuit 15 is sufficiently controlled
When the output from the inverter circuit 15 decreases
It is necessary and sufficient to drive and control various circuits
An auxiliary voltage Vs of an appropriate magnitude can be taken out. [0030] [Output control unit] The output control unit 20 includes the inverter circuit 15
Terminal and switch of output transistor 41 constituting
The collector end of the transistor 59 is connected to a diode 6
0 and the emitter end is grounded.
The secondary output detection circuit 32, the rotation abnormality detection circuit
“H” from any one of 33 or the central control unit 19
The level control signals S1, S2, and S3 pass through the OR circuit 61.
At the same time as input to the base end of transistor 59
And the output transistor 41 of the inverter circuit 15
Operation of the inverter circuit 15 by grounding the base end of the
To stop. [0031] [Rotation control unit] As shown in FIG.
Is stopped, but the switch contact 8a is turned on.
And operates in conjunction with the rotation axis of the motor 5.
A rotation detection circuit 23 for detecting movement, and a detected rotation speed
The motor applied voltage is controlled in accordance with
And a rotation control circuit 24 for making it substantially constant. The rotation detecting circuit 23 detects the movement of the motor rotating shaft.
Consisting of a light emitting diode and a phototransistor
The detection is performed using the photo interrupter 62 and the rotation of the motor 5 is detected.
A signal having a frequency corresponding to the rotation speed is generated. This signal
Further, it is input to the filter circuit 63, and
Only the AC signal of the corresponding frequency component is selectively shaped
The signal is sent to the circuit 64. The waveform shaping circuit 64 includes a comparator 65
Output signal from the filter circuit 63 to the negative input terminal of
Signal on the other hand, the secondary battery voltage Vm
Is applied by resistors 66 and 67 and a reference voltage is output.
The power end is connected to a secondary battery 6 via a resistor 68.
Connect the anode 69 and make positive feedback with the resistor 70
From both ends of the diode 69.
Rectangular waveform whose peak value is regulated by the forward voltage of mode 69
Is output to the rotation control circuit 24. The rotation control circuit 24 determines the rotation speed of the motor 5
The input signal of the frequency corresponding to
After converting to a detection signal of the magnitude corresponding to the wave number,
Compared to the reference voltage at 72, a gap occurs between the two.
And a control signal corresponding to the deviation value
Send to The motor control circuit 73 is connected to Darlington.
Circuit for supplying current to the motor 5
The transistor 74 is interposed in accordance with a control signal.
And the collector voltage of the transistor 74
By controlling the voltage drop between the emitters,
Increase or decrease the applied voltage to determine the magnitude of the load applied to the motor 5.
Or regardless of the level of the terminal voltage Vm of the secondary battery 6
A rotation speed control for maintaining a substantially constant rotation speed is performed. [0034] [Detection Unit] The AC input detection circuit 30 is arranged as shown in FIG.
Connected in parallel with the inverter circuit 15 on the output side of the flow circuit 39.
Power plug 12 is inserted into the outlet and
Whether the sled 1 is in the use mode of the commercial AC power supply 14
To detect whether the central control unit 19
The main power supply via the transistor 121 connected to the output port
Although an “H” level voltage is applied from the source 21,
When the AC power supply 14 is input, the
The rectified full-wave rectified voltage is divided by resistors 75 and 76 and
The voltage generated at both ends of the resistor 76 when a force is applied to the transistor 7
7 is turned on and grounded, so that the central control unit 19
An "L" level detection signal Sa is sent. The secondary output detection circuit 32 is provided as shown in FIG.
And connected to the output side of the auxiliary power supply 22,
Output voltage Vs of auxiliary power supply 22 is divided by resistors 78 and 79
As a result, the flow from the inverter circuit 15 to the secondary battery 6
The average value of the pulsed charging voltage output
For example, a detection voltage having a changing value is extracted. Moreover
Voltage and reference voltage using forward voltage of diode 80
Are compared by a comparator 81 using an OP amplifier, and
Output control from comparator 81 when output voltage exceeds reference voltage
The control signal S1 is sent to the
By stopping the oscillation intermittently, the commercial AC power 14
If the voltage value of the
Power output from the data circuit 15 to the secondary battery 6 side
Control the output of the inverter circuit 15 so that
Do. It should be noted that while the inverter circuit 15 is operated,
When the motor 5 is driven, the above-described detection voltage decreases.
On the other hand, the reference voltage maintains a substantially constant value. Therefore,
The switch contact 8a for energizing the motor 5 is turned on and the motor
5 and a parallel resistor 82 for generating a detection voltage.
Is turned off at the switch contact 8b, and the detection voltage is increased to perform the detection.
The output voltage value is corrected, and
Regardless of the magnitude of the load current, the
The output power can be maintained substantially constant. In addition, detection voltage generation
Connect the capacitor 83 in parallel with the raw resistor 79 and peak
Suppress the voltage, delay the time when control starts
Control error as small as possible. Furthermore, reference voltage generation
Thermistor 84 is connected in series with the diode 80 for
The current flowing through the diode 80 in response to the
Fine adjustment is performed to stabilize the reference voltage. As shown in FIG.
Connected to the output side of the rotation detection circuit 23,
When the road 15 is operating and the switch 8 is turned on,
Although the power is supplied to the power supply 5, for example, a secondary battery
When the motor 5 fails to start due to insufficient capacity of the motor 6
And sends a control signal S2 to the output control unit 20 to
The circuit 15 is forcibly stopped, and the inverter circuit 15
To prevent an excessive current from flowing through the motor 5. That is, the output voltage Vm of the main power supply 21 is switched
The collector of the transistor 85 is connected via the switch contact 8a.
The voltage is applied between the emitters and the rotation detection circuit 23
Is applied to the base end, so that the motor 5
Of the secondary battery voltage Vm in accordance with the rotation of
And a rectangular wave signal is taken out at the collector end. this
The signal is further smoothed by a rectifier circuit 86 and
The output voltage Vs from the auxiliary power supply 22
Is applied to the output control unit 20 and the transistor 87
The input side of the output control unit 20 is turned on by the transistor 87 when turned on.
Grounding is possible. With this configuration, the inverter circuit 15
While not operating, the output voltage Vs from the auxiliary power supply 22
While the motor 5 is rotating normally, the transistor 87
Are turned on and the control signal S2 to the output control unit 20
, The inverter circuit 15 operates normally.
to continue. However, even when the inverter circuit 15 is operating,
If the rotation of the motor 5 is locked,
Output voltage Vs from the secondary output detection circuit 3
2 controls the output from the inverter circuit 15 to increase.
Control, a large current from the inverter circuit 15 to the motor 5
Transistor 87 is turned off and the auxiliary power
The output voltage Vs from the source 22 is sent to the output control unit 20 as a control signal.
Apply as S2 and forcibly stop inverter circuit 15
To prevent the inverter circuit 15 from being damaged by overload.
Prevent naturally. The load amount detection circuit 34 includes a motor control circuit 7
3 is applied to the motor 5
Utilizing the fact that it increases or decreases according to the magnitude of the applied load
To detect the power consumption of the motor 5 in two stages, large and small.
As shown in FIG. 5, the base voltage is
The value obtained by dividing the voltage divided by the resistors 89 and 90 and the secondary battery voltage Vm
Comparator using OP amplifier with value divided by 91 and 92
"H" or "H" or "H"
An “L” level detection signal Sc is sent to the central control unit 19. The upper limit voltage detection circuit 35 is provided as shown in FIG.
And resistors 93 and 94 for voltage division connected in parallel with the main power supply 21
Then, a value proportional to the change in the terminal voltage Vm of the secondary battery 6 is detected.
An output voltage is taken out from both ends of the resistor 94. The resistor 94
A transistor that is turned on by the output voltage Vs from the auxiliary power supply 22
95 are connected in series, and the inverter circuit 15 operates.
Only during operation, the transistor 95 turns on and outputs the detection voltage.
Power to save power,
A detection signal corresponding to the operation timing is output. The detection voltage is further compared by using an OP amplifier.
And the reference voltage formed by the diode 97 in the detector 96.
And the terminal voltage of the secondary battery 6 is set in advance.
It is detected that the fully charged state is approaching beyond the upper limit voltage.
Output terminal is inverted from “L” to “H” level,
Signal to the transistor 98 connected to the input port of the
Signal and turn on the transistor 98 to switch the input port
When the detection signal Sh is sent to the ground, the secondary battery 6
The central control unit 19 is notified of the arrival. The lower limit voltage detecting circuit 36 is provided with a switch contact 8
Operates only during the motor drive period in conjunction with the ON operation of c
The terminal voltage Vm of the secondary battery 6 is
・ Divided by 100 and take out detection voltage, diode 1
01 and the comparator 102
Although the “H” level detection signal is output, the voltage is
When the voltage falls below the set lower limit voltage, it changes to "L" level,
The detection signal Sb is sent to the central control unit 19 and the end of the
Notifies that the slave voltage Vm has fallen below the lower limit voltage. When discharging, the ambient temperature of the secondary battery 6 rises.
When it rises, the apparent output voltage from the secondary battery 6 decreases
The detection voltage and reference voltage also drop, but the detection voltage
While the reference voltage is exponential
To decline. Therefore, bases that tend to decrease more than necessary
Thermistor 1 in series with diode 101 for generating a reference voltage
03 and the diode 101 and the
And raise the temperature of each divided voltage ratio in thermistor 103
The same trend as before, and diode 1
03 to increase the value of the reference voltage itself.
I am trying to correct it. The motor power supply detection circuit 31 includes a switch knob
9 to inform the central control unit 19 of the operation status.
Therefore, in this embodiment, as shown in FIG.
The output voltage Vm is set to the thermistor 103 of the lower limit voltage detection circuit 36.
And the input of the central control unit 19 through the diode 101
Always apply the voltage to the port, and operate the switch knob 9
By grounding the input port with the switch contact 8c,
A detection signal that changes from “H” to “L” level at the port
Ss, and sends the energization time to the motor 5 to the central control unit 19.
Inform. [0046] [Central control unit] FIGS. 7 and 8 show the central control unit shown in FIG.
Control by a program stored in the ROM 26 of the unit 19
FIG. 9 is a flowchart showing an outline of the control procedure, and FIG.
During control by the internal
Diagram showing the correspondence relationship of counters configured in a pseudo manner
In the following, the configuration of the central control unit 19 will be described with reference to FIGS.
explain. The central control unit 19 has a basic configuration as shown in FIG.
The circuit configuration is simple, the mode of use of the shaver 1 and
Every time the detection condition changes during this mode.
The circuit configuration by changing the
Substantially changeable for each mode and detection condition in each mode
By using the same circuit, multiple different
Mode control processing.
Output every 15 msec from msec timer 104
Each signal of the I / O device 28 shown in FIG.
The detection signal is read into the central processing unit 27 from the
The current use mode is determined from the signal value and the counter value
After performing predetermined mode processing such as initialization,
A series of processes such as multiplication of are performed. That is, the output of the 15 ms timer 104
The end is connected to the 1 second counter 105, and the 1 second counter
Each time one second elapses after 105 counts over,
A signal is sent to the counter 106. The mode counter 106 is used to charge the rechargeable battery 6.
Power, motor 5 AC drive, and battery drive modes.
First and second counters 107 and 108 to be used, and standby
Standby mode counter 109 used in mode
And reset the counter value every time the mode is changed
At the same time, during each mode, the first
And the second mode counters 107 and 108
Depending on the mode of use, the rate of increase or decrease
It is possible to calculate the total pond capacity. That is, a series of operations performed every 15 milliseconds
During step processing, one mode uniquely determined by the detection conditions
Only the code counter becomes active and the corresponding counter
Countdown processing is performed on the
Clock counter 106 finishes counting the predetermined value and becomes zero.
Then, a signal is sent to the next main counter 110 and
Then, the initial counter value of the corresponding mode is set again. The main counter 110 is incremented by 128.
This is a down counter, and the
Value as it is, and in charging mode
Count value is up-counted and in other modes
The following display cow
And the count value of the main counter 110
To determine the current battery capacity, regardless of the mode change.
Give continuity to the display operation on the pond capacity indicator 11
I am doing it. The main counter 110 counts a predetermined number.
Every time it counts up, the display counter 111
Sends a down signal and changes the value of the display counter 111.
You. The display counter 111 has a 4-bit shift
The configuration is almost equivalent to a register.
Green light emitting diode 11a for 100 to 40% display
To 11d and the main counter 110
By shifting the bit every time a signal is input
Increase or decrease the number of light emitting diodes to be lit, and
Battery capacity up to 20% can be displayed step by step at 20% intervals
ing. Note that the count value of the display counter 111 is zero.
40% to 100% of the light emitting diodes 11a to 11
When all of d are turned off, the red 20% and 0% display
The light emitting diodes 11e and 11f are turned on and off. Next, an outline of the circuit operation described above is shown in FIG.
And the program shown in FIG. Central control
With the main power supply 21 connected to the unit 19, the reset signal Sr
Is applied, a reset is applied at the same time,
After initialization in step 1, 15msec timer 1
04 is started (step 2). The timer 104
During the execution of the program, the timer keeps running,
An interrupt signal is generated every time
When an interrupt occurs, a series of steps described below are performed.
After executing the step, return to step 3 and generate the next interrupt.
Wait to be born. When an interrupt is generated in step 3, FIG.
Through the corresponding input port of the I / O device 28 shown in
Detection signal Sa and AC signal output from AC input detection circuit 30
Signal Ss output from the motor and power supply detection circuit 31
Are read (Step 4), and Steps 5 to
In step 7, charging is performed according to the presence or absence of Sa and Ss input.
Divided into four modes: electricity, AC drive, battery drive and standby
The mode is changed to the previous
When it is confirmed that it is different from the time when the
Make settings corresponding to the mode. For example, if there is an AC input and the switch 8
Is turned off, the main power is supplied from the inverter circuit 15.
Charge only toward the secondary battery 6 of the power source 21.
Mode, so that in step 21
Settings, that is, output requirements for the inverter circuit 15
Request and set the main counter 110 in the up direction
Then, a request to turn off the rotation control display 10 is issued, while the battery capacity is
Display of the quantity indicator 11 corresponding to the value of the display counter 111
Make a request. Further, in step 22, the I / O device 28
The detection signal Sh of the upper limit voltage detection circuit 35 is read, and the secondary
That the terminal voltage Vm of the battery 6 has not reached the upper limit voltage;
If confirmed, the first mode counter 10
7 is set to the octal counter, and the main counter is set every 8 seconds.
By making 110 up processing possible, 8 × 128
= Emission table of battery capacity indicator 11 every time 1024 seconds elapse
The reading is increased by one. Contrary to the above, in step 22 the upper limit voltage is
When it is detected that the battery has reached, the secondary battery 6 is almost fully charged.
Since it is determined that the state is close, step 24
Light up all 40-80% of light emitting diodes
Issue a request to indicate that the
Set the mode counter 108 to a quaternary counter and
The count value of the counter 110 is set to zero. This
As a result, additional charge is performed for about 8 minutes after reaching the upper limit voltage.
After a while, the main counter 110 counts over.
Then, a display of 100% charge is made. It should be noted that once the upper limit voltage has been reached,
When it is issued, a flag is set and the display counter 111
When the battery capacity display is 100%, the above upper limit voltage
Do not perform the reloading process of. By such processing, the example
For example, if charging is interrupted during charging due to a power outage, etc.
The terminal voltage may fall below the upper limit voltage without reducing the amount.
However, even in such a case, when charging is resumed,
Without resetting the in-counter 110
The count value of the counter 110 is saved and
Operation is performed continuously starting from the count value at the time of charging interruption.
Therefore, overcharging is prevented beforehand. Next, if there is an input from the commercial AC power supply 14 and
If power is supplied to the motor 5, the motor 5
In the “AC drive mode” driven by using the power supply 14
Therefore, in step 25, common settings for the AC drive mode,
That is, an output request to the inverter circuit 15 is issued.
The main counter 110 is set in the down direction,
Lighting request of the operation control display 10 and the battery capacity display 11
Put out. Further, in step 26, an AC drive mode is entered.
It is determined whether 15 minutes have passed continuously since
If “YES”, move to the battery drive mode described later and
The inverter circuit 15 is stopped for 30 minutes, and the inverter circuit 1 is turned off.
5 prevents overheating. However, the determination in step 26 is "NO".
Then, in step 27, the load amount is detected from the I / O device 28.
The detection signal Sc of the road 34 is read, and the
If the current consumption is smaller than the reference value, the first mode is
Set the counter 107 to hexadecimal,
In step 29, the second mode counter 108 is set to decimal.
Set the current reduction rate of the main counter 110
Correct in proportion to. Next, there is no AC input and the switch 8 is turned off.
Motor 5 is driven by the secondary battery 6
Step 30
The setting common to the battery operation mode, that is, the main counter
The rotation control display 10
Then, a lighting request of the battery capacity indicator 11 is issued. Further, in step 31, the same as the AC drive mode is performed.
The detection signal Sc of the load amount detection circuit 34 is read in
If the current consumption of the motor 5 is small, the first mode is
Mode counter 107 to quaternary mode
Signal from the counter 106.
Set to ternary in step 33 and set the main counter 110
Increase the rate of decrease and make settings corresponding to the battery operation mode.
U. Next, there is no AC input and the motor is driven.
In the “standby mode” that is not set,
Stops the lighting request for the display, and further sets the main counter 1
10 is set to the down side, and at step 35
Standby mode count 109 count value increased to 16000
set. As described above, a predetermined mode set operation is performed.
After that, the detection processing of the lower limit voltage is performed in step 12.
Be done. With this process, the
When the limit voltage is detected, the main counter 110 and the display
Display counter 111 is set to a predetermined value, and the battery capacity is set.
The displayed value is absolutely corrected with the lower limit as described later. Next, at step 13, the one-second counter 105 is set.
Counts down and the 1 second counter 105 counts down.
When the bar is clicked, the mode is detected in step 14
Count down the designated mode counter 106
You. In step 15, the power of the mode counter 106 is
When the countover is determined, the main counter 110
Is counted up or down (step 16).
At step 17, the count value of the main counter 110 becomes zero.
Or 128 has been reached,
At step 18, the display counter 111 is counted up or
Goes down. Thereafter, at step 19, the display 10.1
1 and whether the display counter 111
The display corresponding to the value is performed.
Output processing to the data circuit 15 and a series of processing ends.
You do it. Next, based on FIG. 10 to FIG.
Lighting status of indicators 10 and 11 for each mode, inverter control
Changes in the signal So and the count value of the main counter 110
Is specifically described. First, in the charging mode, the charging amount is 20%.
Until the battery reaches 100% charge, as shown in FIG.
15ms for about 60ms for the secondary battery 6
1 based on the control signal So whose duty ratio to stop is 4/5
C charging is performed. That is, as shown in FIG.
During which the “H” level control signal So is output
Means that the transistor 121 is turned on and the AC input detection
Since the transistor 77 on the path 30 is also on, the control signal
The signal S3 maintains the “L” level, and the inverter circuit 15
Normal oscillation operation is performed, but the control signal So is at the “L” level.
, The transistor 121 is turned off and the main power
16 controls the output voltage Vm as the control signal S3.
Sent to the section 20 to stop the inverter circuit 15 for 15 ms.
80 when the inverter circuit 15 is operated for the entire period.
At 1% output, the secondary battery 6 is charged by 1C. [0072] Such 1C charging takes about 16 minutes to charge 20%.
This corresponds to an increase in the amount of electricity, and as a result, the solid line in FIG.
As shown, the number of light-emitting diodes is not one every 16 minutes
One is raised. The current capacity of the secondary battery 6 is determined by the light emitting
Iodine lighting position, ie, the counter of display counter 111
And the count value of the main counter 110
However, the battery capacity itself is calculated based on the charging time.
Charge / discharge over a long period of time
The error of returning is inevitable. So when charging
The terminal voltage Vm of the secondary battery 6 is set in advance.
If it is detected that the upper limit voltage value has been exceeded,
Absolutely correct the charge amount. That is, charging is continued, for example, 60% charging.
Is displayed at time t1 at which the upper limit voltage is not detected.
As a result, the display of 40 to 80% is immediately displayed as indicated by the solid line.
Lights up and counts the main counter 110
The value is set to 0, and the mode counter 106 is set to the first mode.
From the mode counter 107 to the second mode counter 108
To double the advance rate of the main counter 110,
About 8 minutes, half of the time until the counter of the main counter 110
The default value is set to count 128, and an additional 8 minutes
Charge the battery. With such a configuration, a light emitting die of 80% display
From when the Aether is turned on until the 100% display is turned on
Of the main counter 110 is also 128.
The interval between each 20% display is 1 of the main counter 110.
Battery capacity calculation during charge / discharge
Can be performed continuously through the
Always display 80% for a predetermined time before displaying 00%
It is set as follows. After the additional charge is completed, at time t2
Lighting display by 100% light emitting diode 10a is performed.
At the same time, the count value of the main counter 110 is reset again.
And then invert the inverter control signal So to
Ration ratio is reduced to 1/5 and trickle charging by 0.25C
Enter the electricity. At this time, the main counter 110 is half of 128
Stop counting up with a count value of 64 / min.
By waiting for the change of use mode while maintaining the value,
Shift from 100% charge display state to drive mode of motor 5
100% display, 40-80% display time
About 100% of the time, and 100% display will last longer than necessary
To prevent users from feeling uncomfortable
You. It should be noted that charging and discharging of the secondary battery 6 were performed many times.
Repeatedly, when the terminal voltage Vm of the secondary battery 6 is fully charged
May not reach the upper limit voltage. Such a place
In this case, the absolute
10 (a) 100% light emitting die
Until time t3 when the Aether 10a lights up, only time is reference
After performing 1C charging with
I have to. Next, the motor switch is kept in the above-mentioned charged state.
When the switch 8 is turned on, the apparatus enters the AC drive mode.
In this mode, the charging mode is larger than the charging mode described above.
Power, the duty ratio of the control signal So is set to 1
And always operate the inverter circuit 15 for charging.
15 minutes or more while a larger current can be supplied to the load side
When the motor is driven continuously, the inverter circuit 15
Inverter circuit 15 for 30 minutes for safety
Prevent overheating. The display in this mode indicates that the motor is empty.
In the case where the load amount is small, for example, when turning, the solid line in FIG.
If the load is large every 32 minutes, as shown by
As shown by the line, lower the lighting position by 20% every 20 minutes
Go down to the 20% position, the 0% and 20% tables
Flashes the indicator. However, actually, when the motor 5 is stopped,
After entering the charging mode and charging,
In the current drive mode, most of the consumed current
Supplied from the inverter circuit 15 to the secondary battery 6 itself.
Since the amount of current consumed by the battery is extremely small,
The small percentage is smaller than the above graph and the lower limit voltage is not detected.
Battery capacity does not decrease until the
No correction is made. Next, in the battery drive mode, the current consumption
Are supplied from the secondary battery 6, so that
As shown by the solid line in FIG.
Minutes, and for heavy loads, set as short as 6 minutes, as indicated by the dashed line.
Have been. Further, in this mode, at time t4, the 40% capacity is increased.
The main counter 110 stops counting at the same time
Stop and detect the lower limit voltage while keeping the count value at zero
Until the lower limit voltage is detected,
Perform lower limit correction. At time t5, the lower limit detection state is entered.
, The correction process is not performed immediately,
The voltage confirmation process is started. That is, when the motor is driven
The fluctuation of the secondary battery terminal voltage at
The malfunction of detecting the lower limit voltage occurs even though the capacity is sufficient.
Cheap. Therefore, in this embodiment, detection of the lower limit voltage and
At the same time, the 10-second counter 112 shown in FIG.
The counter 112 counts 10 seconds and continues for 10 seconds
When it is confirmed that the lower limit voltage has been detected, the next lower limit voltage is detected.
Move on to the pressure correction process. For example, the detection of the lower limit voltage is determined at time t6.
Then, the count value for 20 seconds is stored in the main counter 110.
Set and count down this value.
40% display for the first time when it is confirmed that has become zero
Is turned off, the 20% display blinks, and FIG.
The display on the rotation control display 10 is stopped as shown in FIG.
Display that the rotation control of the
Set 128 in the main counter 110 and count
Continue down and count down when the count value reaches zero
Stop and save this value. Further, at the time of 60% display at time t8,
The lower limit voltage while displaying the stable operation state.
If is detected, the display should immediately shift to the 20% display.
After waiting for the above-described lower-limit voltage confirmation for 10 seconds,
40% display from t9 for a predetermined time, for example, about 20 seconds
And then move to the 20% display. That is, in any case,
After passing through the 40% display, which is the previous display of the warning state
By setting to shift to warning by 20% display
Warning when the battery capacity is sufficient
The user's embarrassment by moving to
You. Note that once the lower limit voltage is detected, the flag
And read the lower limit voltage again unless the battery goes through the charging mode.
I do not get stuck. When the lower limit voltage is detected, the battery capacity
Even if it is extremely low, once the motor 5
Stop, the terminal voltage Vm self-recovers and rises,
This is because the limit voltage may be exceeded. Also 40% display
The display time of is also the usable time after detecting the lower limit voltage
It is needless to say that the present invention can be appropriately changed and implemented in response to the above. Next, leave the electric shaver 1 without using it.
The secondary battery 6 itself will self-discharge
And always supply power to the internal electronic circuit 7
Therefore, the capacity of the secondary battery 6 is constantly decreasing.
Therefore, the display on the display units 10 and 11 is for power saving.
, But as shown in FIGS. 13A and 13B,
Inside the central control unit 19, the counter of the main counter 110 is
Continue the battery down process and keep the current capacity of the secondary battery 6 constant.
I remember. However, the terminal voltage Vm of the secondary battery 6
Is below the lower limit voltage, and the operation of the central control unit 19 is guaranteed
If the voltage falls below the specified voltage, the circuit operation stops completely.
The above stored values are also lost. Start charging in this state
Then, the circuit itself resumes the operation, but the step of FIG.
Since the initial setting that should be performed in step 1 is not performed,
The displayed value is in an undefined state. The reset circuit 113 shown in FIG.
In this case, the reset signal Sr is sent to the central control unit 19.
Light emitting diodes 11e for displaying 0% and 20%.
11f blinks and the counter value of the main counter 110
Is reset to the initial state of 0, and the secondary battery
An oscillation circuit 114 that self-oscillates by applying a voltage from
When the terminal voltage Vm of the secondary battery 6 exceeds a predetermined value, the oscillation circuit
A switching circuit 115 for stopping the oscillation operation of 114;
Consists of The oscillation circuit 114 has two transistors 1
This is a multivibrator using the 16/117,
By applying the voltage Vm from the power supply 21,
The registers 116 and 117 alternately turn on and off
A rectangular reset signal is applied to the reset terminal of the central control unit 19.
Sr can be continuously applied. The switching circuit 115 is connected to the main power supply 21.
The output voltage Vm is divided by the resistors 118 and 119 and the divided voltage
The transistor 120 is turned on and off by the voltage, and
Transistor 1 of the oscillation circuit 114 between the collector and the emitter
17 is bypassed. With this configuration, the secondary battery 6 discharges
Therefore, the terminal voltage Vm is low, so that the transistor 120 is turned off.
When charging is started in the off state, first, the oscillation circuit 1
14 starts an oscillating operation and generates a rectangular reset signal S
r is sent to the central control unit 19 to continue the reset operation. At this point, charging has progressed, and the output power of
The voltage Vm increases and the turn-on voltage of the transistor 120 increases.
, The voltage applied to the oscillation circuit 114 gradually increases.
As a result, the oscillation circuit 114 stops and resets.
The input of the signal Sr to the central control unit 19 stops, and
The control unit 19 performs the above operation from step 1 shown in FIG.
It starts. Note that the test signal St is input at the time of reset.
If so, enter test mode. These modes are
Check the charge amount display operation using the counter described in a short time.
9 and, specifically, FIG.
Bypass the 1 second counter 105 shown in
Counter operation of counter directly by output signal of timer 104
Do the work. For example, select the charging mode during the test mode.
If you choose, 15ms x 8 x 128 = 16 seconds,
A charge check for 20% is performed in about 16 seconds.
You.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a basic configuration of the present invention. FIG. 2 is a partially cutaway front view showing an external shape. FIG. 3 is a block diagram schematically showing an overall configuration of an electronic circuit. FIG. 4 is an electric circuit diagram specifically showing a configuration of a power supply part in FIG. FIG. 5 is an electric circuit diagram specifically showing a configuration of a motor control portion in FIG. FIG. 6 is an electric circuit diagram specifically showing a configuration of a central control portion in FIG. FIG. 7 is a flowchart illustrating a processing procedure according to a program in a central control unit. FIG. 8 is a flowchart showing details of a mode setting portion in FIG. 7; FIG. 9 is a block diagram showing a configuration corresponding to each procedure shown in FIGS. 7 and 8; FIG. 10 is an explanatory diagram showing an operation corresponding to the configuration of the charging mode in FIG. 8; FIG. 11 is an explanatory diagram showing an operation corresponding to the configuration of the AC drive mode in FIG. 8; FIG. 12 is an explanatory diagram showing an operation corresponding to the configuration of the battery drive mode in FIG. 8; FIG. 13 is an explanatory diagram showing an operation corresponding to the configuration of the standby mode in FIG. 8; [Description of Signs] 5 Motor 6 Secondary battery 7 Electronic circuit 8 Switch 10 Rotation control display 11 Battery capacity display 14 Commercial AC power supply 15 Inverter circuit 16 Power supply unit 17 Rotation control unit 18 Detection unit 19 Central control unit 20 Output control Unit 21 main power supply 22 auxiliary power supply 30 AC input detection circuit 31 motor power supply detection circuit 32 secondary output detection circuit 33 rotation abnormality detection circuit 34 load amount detection circuit 35 upper limit voltage detection circuit 36 lower limit voltage detection circuit 46 output coil 47 tertiary coil

Claims (1)

(57) [Claims] Means for integrating the amount of charge of the secondary battery (6), means a first charging the detecting means detects the preset voltage values for detecting a terminal voltage of the secondary battery (6) <br / > electrostatic restricting operation to have the line, before the detection means detects a setting voltage value
When the integrated value in the integrating means reaches the set value, the second
And a row intends charging control means charging regulation operation of the first charging regulation operation described above is Yoriso above integration means
Compact electric apparatus that amount of charge is characterized by charging der Rukoto follow is restricted. 2. The second charge regulating operation performed by the charge control means described above is
2. The small electric device according to claim 1, wherein the electric device is trickle charging .