JP2000125480A - Power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To charge one battery while discharging (feeding power to) another by providing a plurality of batteries that can be charged and be separately discharged, a charging battery selection means that selects a battery to be charged, and a charging means for charging the selected battery by a commercial power supply. SOLUTION: At a charging part 105, the voltage of L104 is converted into an appropriate voltage for charging battery parts 1 and 2 of a charging-type battery with charging/discharging characteristics, and a charge voltage L105 is outputted. Relays 106 and 107 are changed by a CPU part 118 for selecting, thus applying the charge voltage L105 to one of the battery parts 1 and 2 for performing charging operation, or preventing the charge voltage from being applied to the battery parts 1 and 2. Also, a relay 108 supplies one of output L107A of the battery part 1 and output L107B of the battery part 2 to a terminal 109B. According to the CPU part 118, either of output L108 of one of the battery parts 1 and 2 and the L104 from a commercial power supply can be selected by the relay 109.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device suitable for an image forming apparatus in which a commercial power supply and a secondary battery are used in combination as power supply means.

[0002]

2. Description of the Related Art In a conventional image forming apparatus, AC 100 V from a commercial power supply line is supplied to a DC power supply unit in the apparatus, and converted into a DC voltage required by a load and control units in the apparatus. Had supplied. Also, for a fixing heater requiring a large amount of power, energization control of AC 100 V from a commercial power supply line by a heater ON / OFF control element such as an SSR (solid state relay) may be performed in some cases.

As an application example of a small portable image forming apparatus, a copying machine equipped with a rechargeable battery in the apparatus has been proposed for use outdoors. For example, in normal use, AC100V from commercial power line
Is connected to a DC power supply unit in the copying machine to perform a copying operation. When the copying operation is not performed, the rechargeable battery in the device is charged. For example, when the battery is used outdoors, even if the AC 100 V cable is cut, the copying is performed by the power of the rechargeable battery in the device. It enables operation.

[0004]

In recent years, in a situation where environmentally friendly products such as energy saving have been demanded, not only the copying performance of the apparatus but also any limited energy resources can be effectively used. Whether a product is a product is also an important technical theme.

Under such circumstances, an image forming apparatus which can be used only when a commercial power supply is connected as described above is usually used.
Even when the apparatus is in the standby state, the fixing heater is energized, and the amount of power consumed during standby is enormous. In addition, since it is considered that the usage rate during the daytime is high in many cases, considerable power consumption is required even when the power supply situation is imminent.

Accordingly, by making full use of the nighttime power, fully charging the rechargeable battery in the apparatus at night, and performing the image forming operation using the charged power during the daytime. Thus, effective use of energy resources will be possible. As an application example of the rechargeable battery, an example such as a portable copying machine having a built-in rechargeable battery as described above can be found, but for the purpose of emphasizing portability, it is not necessarily used as a full-scale image forming apparatus. Some aspects are not suitable for use.

[0007] That is, the user must sequentially specify whether to use a rechargeable battery or a commercial power supply, and the rechargeable battery is sufficiently discharged to drop to an appropriate discharge end voltage. It is necessary to start the charging operation from the beginning, and performing the charging operation indiscriminately without appropriately managing the state of the battery often causes a memory effect of the rechargeable battery. The use of the rechargeable battery that shortens the life of the rechargeable battery not only prevents the original performance of the battery from being exhibited, but also increases maintenance costs due to device failure and repair. In the operation rate of the vehicle.

Accordingly, an object of the present invention is to provide a power supply device capable of performing a suitable charge for a device using a battery.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, an invention according to claim 1 comprises a plurality of rechargeable batteries which can be individually discharged and a rechargeable battery for selecting a battery to be recharged. It is characterized by comprising selecting means and charging means for charging the selected battery with a commercial power supply.

According to a second aspect of the present invention, there is provided the power supply device of the first aspect, further comprising a charge state detecting means for detecting a charge state of the plurality of batteries, wherein the charge state detection means detects a charge state of the plurality of batteries. The charging means performs charging.

According to a third aspect of the present invention, in the power supply device according to the first or second aspect, the charge state detection means detects a discharge voltage of the plurality of batteries as a charge state.

According to a fourth aspect of the present invention, in the power supply device according to the second or third aspect, the state-of-charge detecting means detects a proper end-of-charge voltage of the battery, and the charging is performed in response to the detection. The means is characterized by terminating charging.

According to a fifth aspect of the present invention, in the power supply device according to the fourth aspect, the power supply apparatus further includes a storage unit for storing the value of the proper charging end voltage, and the charging state detecting unit stores the value of the detected voltage in the battery. It is characterized in that it is detected that the battery has reached a proper end-of-charge voltage by comparing with a value stored in the storage means.

According to a sixth aspect of the present invention, in the power supply device according to any one of the first to fifth aspects, a battery output selecting means for selecting a battery to be discharged for power supply, and And a control unit for supplying power.

According to a seventh aspect of the present invention, in the power supply device according to the sixth aspect, the power supply apparatus further includes discharge state detection means for detecting a discharge state of the plurality of batteries, and the charge state detected by the discharge state detection means is changed to a charge state. In response, the battery output means selects a battery to be discharged.

According to an eighth aspect of the present invention, the voltage detecting means for detecting the voltage of the battery is the charging state detecting means according to the second aspect.
The present invention is characterized in that it is shared with the discharge state detecting means.

According to a ninth aspect of the present invention, in the power supply device according to the seventh aspect, the discharge state detecting means detects a proper discharge end voltage of a discharged battery.

According to a tenth aspect of the present invention, in the power supply device according to the ninth aspect, the power supply unit further includes a storage unit for storing the value of the proper discharge end voltage, and the charge state detection unit stores the detected voltage value in the power supply device. It is characterized in that it is detected that the battery has reached the proper discharge end voltage by comparing with a value stored in the storage means.

The invention of claim 11 is the invention of claims 1 to 1
0, wherein the charging unit does not charge the other battery when charging one of the plurality of batteries. Features.

A twelfth aspect of the present invention is a battery, comprising: a plurality of rechargeable batteries which can be individually discharged; measuring means for measuring the plurality of voltages in a time series; and a plurality of batteries based on the measured voltages. Storage means for storing flag information indicating the charging / discharging state of the battery; charging battery selection means for selecting a battery to be charged based on the flag information; charging means for charging the selected battery with a commercial power supply; A battery output selecting means for selecting a battery to be discharged for power supply based on the information, and a control means for supplying power to the selected battery are provided.

According to a thirteenth aspect of the present invention, in the power supply device according to the twelfth aspect, the flag information indicates one of a charging operation, a discharging operation, and a standby operation in which charging and discharging are not performed. Features.

According to a fourteenth aspect of the present invention, the power supply device according to the first aspect further comprises an error detecting means for detecting a charging error, and a means for outputting an alarm in response to the detection.

According to a fifteenth aspect of the present invention, in the power supply device according to the first aspect, the D is provided for converting the commercial power into a DC voltage.
A plurality of batteries that are detachable from the apparatus main body, and when the plurality of batteries are not attached to the apparatus main body, power is supplied from the DC power supply. .

According to a sixteenth aspect of the present invention, in the power supply device according to the fifteenth aspect, while the DC power supply is operating, productivity is reduced to reduce power consumption.

According to a seventeenth aspect of the present invention, in the power supply device according to the fifteenth aspect, the DC power can be supplied even when the plurality of batteries are mounted.

The invention according to claim 18 is the power supply device according to claim 17, wherein the DC power is supplied when the plurality of batteries are mounted.
The power supply and the plurality of batteries supply different voltages.

According to a nineteenth aspect of the present invention, in the power supply device according to the fifteenth aspect, the DC power supply is mounted when the plurality of batteries are mounted.
The power supply and the plurality of batteries supply the same voltage.

[0028]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(Embodiment 1) FIG. 1 shows a configuration example of a main power supply related control block of the present embodiment. FIG. 2 shows a configuration example of a circuit for detecting a state of charge of a rechargeable battery. FIG. 3 shows another configuration example of the circuit for detecting the state of charge of the rechargeable battery. FIG. 4 shows a flowchart example of a basic operation of the image forming apparatus. FIG. 5 shows a flowchart example of an initial check operation for checking the state of charge of the battery. FIG. 6 shows an example of charging characteristics of a rechargeable battery. FIG. 7 shows an example of the discharge characteristics of a rechargeable battery. FIG. 8 shows a configuration example of the startup mode SW.

FIG. 9 shows an example of a state transition diagram of power supply switching control of the rechargeable battery and the commercial power supply line. Table 1 shows the relationship between the battery state of the rechargeable battery and the relay control signal.

As an image forming apparatus to which the present invention is applied,
Various impact-type image forming apparatuses and various non-impact-type image forming apparatuses such as an electrophotographic system, an ink coating system, and a thermal recording system have been proposed. In the present embodiment, an electrophotographic image forming apparatus will be described as an example, but it goes without saying that the present invention is not limited to a recording method. Further, the image forming operation itself of the image forming apparatus will not be described in detail in order to simplify the description. The present invention is also applied to a copying apparatus in which a document image is read by a document reading apparatus and a reproduced image is obtained by an image forming apparatus, and a printer apparatus which receives electronic information from a computer or the like and obtains a reproduced image. It is useful to do. Hereinafter, the configuration example shown in FIG. 1 will be described using an electrophotographic image forming apparatus as an example.

In FIG. 1, an AC 100 V 15
A power of about A is supplied to the apparatus, and is connected to a (line) noise filter 102 in the main body via a main body power cord of the image forming apparatus. The noise filter 102 may include a fuse (not shown) for safety. In the rectifying and smoothing unit 104 from the noise filter 102 via a main switch 103 (hereinafter, referred to as a main switch), an AC commercial power supply is rectified and smoothed to a substantially DC voltage by a diode bridge circuit (not shown) or a smoothing capacitor (not shown). Is processed (L104). Line L104
Is connected to the charging unit 105 and the relay 109.

When the main switch 103 is turned on, C
Before the PU unit 118 operates, the relay 109 is set to 109A.
The terminal is selected and L104 is input to the DC power supply unit 114 to generate various DC voltage outputs (power system voltage VP and logic system voltage VL) necessary for device control, and supply them to the printer control unit 117 and the CPU unit 118.

The CPU unit 118 includes relays 106 to 111
Are controlled by relay control signals P1 to P6, and the operations of loads such as various motors of the image forming apparatus and input / output control of sensor signals (119) are controlled via a printer control unit 117. It goes without saying that the operations of the image reading unit and the image processing unit (not shown) are also controlled according to the image forming sequence by the CPU unit 118.

The charging unit 105 converts the voltage of L104 into a voltage suitable for charging the battery unit 1 and the battery unit 2 of the rechargeable battery having charge / discharge characteristics as shown in FIGS. , And outputs the charging voltage L105. The CPU 118 switches the relay 106 and the relay 107 to determine whether the charging voltage L105 is applied to one of the battery unit 1 and the battery unit 2 to perform the charging operation, or whether both the battery units 1 and 2 are not applied. You can choose.

The relay 108 is connected to the output L1 of the battery unit 1.
07A and the output L107B of the battery unit 2
9 to the terminal 109B, and the CPU 118 outputs one of the outputs L108 of the battery units 1 and 2 or the L from the commercial power supply.
104 can be selected by a relay 109.

The output of battery unit 1 is connected to terminal 110A of relay 110, and the output of battery unit 2 is connected to relay 110.
, And one is selected by the CPU unit 118 and input to the discharge detection unit 115 as L110. In the discharge detection unit 115, for example, as shown in FIG. 2, the battery voltage L110 is compared with the discharge end voltage L202 set by the variable resistor 202 by the voltage comparator 202, and the battery voltage L110 is equal to or less than the appropriate discharge voltage L202. When the discharge end signal is lowered, the discharge end signal L115 becomes Low. When the battery voltage L110 is higher than the appropriate discharge voltage L202, the discharge end signal L115 becomes High.

Similarly, the output of the battery unit 1 is connected to 111A of the relay 111, and the output of the battery unit 2 is connected to 111B of the relay 111. Is input to In the charge detection unit 116, for example, as shown in FIG. 2, the battery voltage L111 is compared with the discharge end voltage L204 set by the variable resistor 204 by the voltage comparator 202,
When the battery voltage L111 rises to the proper discharge voltage L204 or higher, the charge end signal L116 becomes High.
When the battery voltage L111 is lower than the appropriate charging voltage L204, the charging end signal L116 becomes Low.

Referring to a flowchart example of a basic operation of the image forming apparatus in FIG. 4 and a flowchart example of an initial check operation for checking a charged state of a battery in FIG. explain.

When the main switch 103 is turned off, the terminal 109A is selected as the relay 109 and the relay 1
In 06, the terminal 106A is selected. Therefore, when the main switch 103 is turned off, the DC power supply 11
4. The power supplies of the CPU unit 118, the printer control unit 117 and the like are turned off, and the battery units 112 and 113 are turned off.
Charging / discharging operation is prohibited. When the main switch 103 is turned on (S1), the relays 109 and 106 start up in an initial state before the main switch 103 is turned on.
The mode is the commercial power source selection mode, and the mode is the charging prohibition mode (S2). At this time, the commercial power supply line L104 is input to the DC power supply unit 114 to generate various DC voltage outputs (power system voltage VP, logic system voltage VL) necessary for controlling the apparatus such as the CPU unit 118, and the printer control unit 117 CPU
It is supplied to the unit 118. When the power is turned on, the CPU 118 performs an initialization operation such as turning off various loads and diagnosing a device abnormality (S3). If there is no abnormality in the device diagnosis, the state of charge of the battery units 112 and 113 is checked (S4).

Charge state check flow: FIG. 5 shows an example of the charge state check flow. After the main SW is turned on, in step S4, the charge state check flow of FIG. 5 is started (S21). First, a battery check flag CK = 1 is set in a rewritable random access memory (hereinafter referred to as RAM) area (not shown) of the CPU unit (S22). If CK = 1, the detection of the battery unit 112 is selected (S23), and the output port P
5 = Low is output. Relay 110 is terminal 110A
Is selected, and the voltage of the battery unit 112 is sent to the discharge detection unit 115 as L110. Further, the output port P6 = Low is output from the CPU unit 118, the terminal 111A is selected as the relay 111, and the voltage of the battery unit 112 is sent to the charging detection unit 116 as L111. Here, the RAM
The battery status flag BS of the area is set to 10H.

FIG. 2 shows the discharge detector 115 and the charge detector 11.
6 shows an example of the configuration of a charge detection unit 116 configured with a voltage comparator. The battery voltage L detected by the discharge detection unit 115
If 110 = VB is equal to or less than the proper discharge voltage L202 = VBL set in advance by the variable resistor 202, the discharge detection output L115 = Low, and the battery voltage L110 = VB
If the appropriate discharge voltage L202 is higher than VBL, the discharge detection output L115 = High is sent to an input port (not shown) of the CPU 118.

If the battery voltage L111 = VB detected by the charging detection unit 116 is equal to or less than the appropriate charging voltage L203 = VBF set in advance by the variable resistor 202,
The charging detection output L116 = Low, and the battery voltage L11
If 1 = VB is larger than the proper charging voltage L203 = VBL, the charging detection output L116 = High
8 to an input port (not shown).

If the battery voltage VB is equal to or lower than the proper discharge voltage VBL, the battery 112 needs to be charged. Therefore, the battery state flag BS = BS + 01H = 10 + 01H = 11.
H is set (S27), and the routine goes to Step S31. If the battery voltage VB is higher than the proper discharge voltage VBL and lower than the proper charge voltage VF, the battery 112 is in the middle of charging or discharging, and the battery state flag BS = BS + 02H to prevent battery deterioration due to recharging.
= 10 + 02H = 12H is set (S29), and the flow shifts to S31.

If the battery voltage VB is higher than the proper discharge voltage VBL and higher than the proper charge voltage VF, the battery 112 is in a fully charged state. Therefore, the battery state flag BS = BS + 03H = 10
+ 03H = 13H is set (S30), and step S is executed.
Move to 31.

In step S31, while the battery unit 112 is being checked, the battery check flag CK = 1, so that
The value of the battery status flag BS of the battery unit 112 is
The initial battery state flag of BS2 is set to BS1 = BS, and the diagnosis of the initial battery state of the battery unit 112 is completed (S32).

When the battery check flag CK = 1 (S33), CK = 2 is set (S34), the process proceeds to step S23, and further proceeds to flow S25 to make various settings for battery state detection of the battery unit 113. Will be implemented. That is, C
If K = 2, battery unit 113 detection is selected (S2
5), the output port P5 = High is output from the CPU unit 118, the terminal 110B is selected as the relay 110, and the voltage of the battery unit 113 is sent to the discharge detection unit 115 as L110. Also, the output port P6 =
High is output, the terminal 111B is selected as the relay 111, and the voltage of the battery unit 112 is sent to the charge detection unit 116 as L111. Here, the battery state flag BS = 20H in the RAM area is set.

In the same manner as the battery check operation in the battery unit 112, the battery check flow S26 to S
31 is processed. In the discharge detection unit 115, if the detected battery voltage L110 = VB is equal to or less than an appropriate discharge voltage L202 = VBL set in advance by the variable resistor 202,
The discharge detection output L115 = Low, and the battery voltage L11
If 0 = VB is larger than the proper discharge voltage L202 = VBL, the CPU 11 sets the discharge detection output L115 = High to
8 to an input port (not shown).

Further, if the battery voltage L111 = VB detected by the charging detection section 116 is equal to or less than the proper charging voltage L203 = VBF set in advance by the variable resistor 202,
The charging detection output L116 = Low, and the battery voltage L11
If 1 = VB is larger than the proper charging voltage L203 = VBL, the charging detection output L116 = High
8 to an input port (not shown).

If the battery voltage VB is equal to or lower than the proper discharge voltage VBL, the battery 113 needs to be charged. Therefore, the battery state flag BS = BS + 01H = 20 + 01H = 21.
H is set (S27), and the routine goes to Step S31.

If the battery voltage VB is higher than the proper discharge voltage VBL and lower than the proper charge voltage VF, the battery 113 is in the middle of charging or discharging, and the battery state flag BS is used to prevent battery deterioration due to recharging. = BS
+ 02H = 20 + 02H = 22H is set (S2
9), proceed to step S31.

If the battery voltage VB is higher than the proper discharge voltage VBL and higher than the proper charge voltage VF, the battery 113 is in a fully charged state. To prevent battery deterioration due to overcharge, the battery state flag BS = BS + 03H = 20
+ 03H = 23H is set (S30), and step S is executed.
Move to 31.

In step S31, since the battery check flag CK = 2 while the battery unit 113 is being checked,
The process proceeds to step S33, and the value of the battery state flag BS of the battery unit 113 is changed to the initial battery state flag BS of the battery unit 113.
2 = BS is set in the RAM (S35), the diagnosis of the initial battery state of the battery unit 113 ends (S36), and step S4 in FIG. 4 ends, and the process proceeds to step S5.

In step S5, the battery state flag BS
1, BS2, relays 106, 107, 108,
109 is controlled. As shown in Table 1, the battery unit 112,
The charge / discharge / standby operation of 113 is designated.

For example, BS1 = 11H, BS2 = 21H
At this time, since both of the battery units 112 and 113 are below the proper discharge voltage, both batteries cannot be used for device operation,
This is a state that requires charging. Therefore, the commercial power line L1
04 is supplied to the DC power supply unit 114, the battery unit 112 performs a charging operation, and the battery unit 113 performs a standby operation. That is, C
Output ports P1 to P4 of the PU unit 118 are output and relay-controlled.

P4 = Low, P3 = ** (Don't Care)
, P2 = Low, P1 = High, and the relay 109
Is terminal 109A = ON, relay 108 is terminal 108A,
In either case, the relay 107 has the terminal 107A = ON, and the relay 106 has the terminal 106B = ON.

When BS1 = 11H and BS2 = 22H,
Since the battery unit 112 is at or below the proper discharge voltage, it is in a state requiring charging, and since the battery unit 113 is at or above the appropriate discharge voltage and below the appropriate charge voltage, power can be supplied to the device by discharging without recharging. State. Therefore, the commercial power supply line L104 is disconnected from the DC power supply unit 114, and the output of the battery unit 113 is supplied to the DC power supply unit 114.
2 is a charging operation, and the battery unit 113 is a discharging output operation.

That is, P4 = High, P3 = High,
P2 = Low, P1 = High, relay 109 is terminal 109B = ON, relay 108 is terminal 108B = ON, relay 107 is terminal 107A = ON, relay 106
Is turned on at the terminal 106B.

When BS1 = 11H and BS2 = 23H,
The battery unit 112 is in a state that requires charging because the voltage is equal to or lower than the appropriate discharge voltage, and the battery unit 113 is in a fully charged state because the voltage is equal to or higher than the appropriate charge voltage, and power can be supplied to the device by discharging without recharging. It is in a state. Therefore, the commercial power supply line L104 is disconnected from the DC power supply unit 114, and the output of the battery unit 113 is supplied to the DC power supply unit 114.
2 is a charging operation, and the battery unit 113 is a discharging output operation.

That is, P4 = High, P3 = High,
P2 = Low, P1 = High, relay 109 is terminal 109B = ON, relay 108 is terminal 108B = ON, relay 107 is terminal 107A = ON, relay 106
Is turned on at the terminal 106B.

When BS1 = 12H and BS2 = 21H,
Since the battery unit 112 is at or above the proper discharge voltage and is at or below the proper charge voltage, it is in a state where power can be supplied to the apparatus by discharging without recharging, and the battery unit 113 needs to be charged because it is at or below the proper discharge voltage. State. Accordingly, the commercial power supply line L104 is disconnected from the DC power supply unit 114, and the output of the battery unit 112 is supplied to the DC power supply unit 114.
2 is a discharge output operation, and the battery unit 113 is a charge operation.

That is, P4 = High, P3 = Low, P
2 = High, P1 = High, relay 109 is terminal 109B = ON, relay 108 is terminal 108A = ON, relay 107 is terminal 107B = ON, relay 106
Is turned on at the terminal 106B.

When BS1 = 12H and BS2 = 22H,
Since the battery units 112 and 113 are higher than the proper discharge voltage and lower than the proper charge voltage, the battery units 112 and 113 are in a state where power can be supplied to the apparatus by discharging without recharging. Therefore, the commercial power line L
104 is disconnected from the DC power supply unit 114 and supplies the output of the battery unit 112 to the DC power supply unit 114. The battery unit 112 performs a discharge output operation, and the battery unit 113 performs a standby operation.

That is, P4 = High, P3 = Low, P
2 = ** (Don't Care), P1 = Low, relay 10
9 is terminal 109B = ON, relay 108 is terminal 108A
= ON, relay 107 may be either terminal 107A or B, and relay 106 is terminal 106A = ON.

When BS1 = 12H and BS2 = 23H,
Since the battery unit 112 is at or above the proper discharge voltage and is at or below the proper charge voltage, it is in a state where power can be supplied to the device by discharging without recharging. In this state, power can be supplied to the apparatus by discharging without recharging. Accordingly, the commercial power supply line L104 is disconnected from the DC power supply unit 114, and the output of the battery unit 112 is supplied to the DC power supply unit 114.
12 is a discharge output operation, and the battery unit 113 is a standby operation.

That is, P4 = High, P3 = Low, P
2 = ** (Don't Care), P1 = Low, relay 10
9 is terminal 109B = ON, relay 108 is terminal 108A
= ON, relay 107 may be either terminal 107A or B, and relay 106 is terminal 106A = ON.

When BS1 = 13H and BS2 = 21H,
Since the battery unit 112 is at or above the proper charging voltage, it is in a fully charged state, and is in a state where power can be supplied to the device by discharging without recharging. This is a necessary state. Accordingly, the commercial power supply line L104 is disconnected from the DC power supply unit 114, and the output of the battery unit 112 is supplied to the DC power supply unit 114.
2 is a discharging operation, and the battery unit 113 is a charging operation.

That is, P4 = High, P3 = Low, P
2 = High, P1 = High, relay 109 is terminal 109B = ON, relay 108 is terminal 108A = ON, relay 107 is terminal 107B = ON, relay 106
Is turned on at the terminal 106B.

When BS1 = 13H and BS2 = 22H,
Since the battery unit 112 is at or above the proper charging voltage, it is in a fully charged state, in a state where power can be supplied to the apparatus by discharging without recharging, and the battery unit 113 is at or above the proper discharging voltage and below the proper charging voltage. Therefore, the device can be supplied with power by discharging without recharging. Therefore, the commercial power supply line L104 is disconnected from the DC power supply unit 114, and the output of the battery unit 113 is supplied to the DC power supply unit 114.
13 is a discharge output operation, and the battery unit 112 is a standby operation.

That is, P4 = High, P3 = High,
P2 = ** (Don't Care), P1 = Low, relay 1
09 is terminal 109B = ON, relay 108 is terminal 108
B = ON, relay 107 may be either terminal 107A or B, and relay 106 is terminal 106A = ON.

When BS1 = 13H and BS2 = 23H,
Since the battery units 112 and 113 are at or above the proper charging voltage,
This is a fully charged state, in which power can be supplied to the device by discharging without recharging. Therefore, the commercial power line L
104 is disconnected from the DC power supply unit 114 and supplies the output of the battery unit 112 to the DC power supply unit 114. The battery unit 112 performs a discharge output operation, and the battery unit 113 performs a standby operation.

That is, P4 = High, P3 = Low, P
2 = ** (Don't Care), P1 = Low, relay 10
9 is terminal 109B = ON, relay 108 is terminal 108A
= ON, relay 107 may be either terminal 107A or B, and relay 106 is terminal 106A = ON.

As described above, immediately after the main switch 103 is turned on, the power supply to the CPU 118 and the like is performed by the commercial power supply line, and then the battery states of the battery units 112 and 113 are checked. Based on (see Table 1), the output port of the CPU is set, and each relay is controlled to determine which of the battery units 112 and 113 or the commercial power supply line to use (S5).

[0074]

[Table 1]

Next, a warm-up operation of the apparatus is performed, for example, by energizing a fixing heater of a fixing unit of the apparatus. Until the warm-up is performed, the apparatus continues the warm-up operation, and displays an announcement such as "Warming up" on the liquid crystal display panel of the operation unit (not shown) (S6). When the warm-up is completed, an announcement such as "Can be copied" is displayed, and the apparatus enters a standby state (S8). When a copy start key of an operation unit (not shown) is pressed (S9), a predetermined copy sequence starts, and an image forming operation is performed (S9).
10). When the copy sequence ends, the apparatus returns to the standby state (S8).

FIG. 3 shows the discharge detecting section 115 and the charging detecting section 11.
6 shows a configuration example in which A / D converters 301 and 302 for converting an analog voltage into digital data are provided. The value of the proper discharge voltage VBL and the value of the proper charge voltage VF are represented by R (not shown).
It is stored in advance as AM data, and the battery voltage VB
By comparing with, the battery state can be checked without using the voltage comparator of FIG. That is, the battery voltage V
If the value of B is equal to or lower than the proper discharge voltage VBL, the battery unit 11
2,113 battery status flags BS1 = 11H, BS2 =
If 21H is set and the battery voltage VB is higher than VBL and lower than VF, the battery state flag BS1 = 12
H, BS2 = 22H are set, and the battery voltage VB is VF
If it is larger, the battery status flag BS1 = 13H, BS
By setting 2 = 23H, a function of checking the battery state can also be realized.

In the present embodiment, an example has been described in which the power supply is always started from the commercial power supply line immediately after the main switch 103 is turned on. However, it is needless to say that the present invention is not limited to this. That is, immediately after the main SW is turned on, the battery unit 112 may be connected to supply power. If the main switch 103 is turned off in a state where the battery unit 112 has completed discharging, the main switch 103 is then turned off.
03 is turned on, the battery unit 112 or 113
Power may be supplied.

For example, as shown in FIG. 8, a line L104 from a commercial power supply is
It is called a start mode SW. ) Terminal 120A. When the start mode SW is selected on the terminal 120A side, the line L104 is connected to the line L104,
Immediately after the main SW 103 is turned on, a mode is set in which the apparatus is started by the commercial power supply. Outputs L107A and L107B of battery units 112 and 113 are connected to terminals 120B and 120C of start mode SW 120, respectively. Start mode SW1
When the terminal 20 is selected as the terminal 120B or 120C, the apparatus is started by the output of the selected battery unit of the battery units 112 and 113.

According to the present embodiment, the battery states of the plurality of rechargeable battery units are checked immediately after the main switch is turned on, so that charging,
The battery state of each battery unit can be set to one of the discharge and standby states. Therefore, deterioration of the rechargeable battery due to overcharge, overdischarge, and recharge of the rechargeable battery from an insufficient discharge state can be prevented.

(Embodiment 2) In the present embodiment, when a predetermined charging voltage is not reached as a result of performing a charging operation, a corresponding battery unit is set to a charging error, and a standby state is set. Or when an error occurs in both battery units, the apparatus is operated by a commercial power supply line.

Hereinafter, the charging control method will be described in detail. The method of detecting the state of charge and the method of detecting the state of discharge of the battery unit will be described by taking the case where each of the detecting means described in the first embodiment is used as an example. It is not limited to the example described.

FIG. 9 shows an example of a state transition diagram of power supply switching control of the rechargeable battery and the commercial power supply line in this embodiment. In FIG. 8, when the main switch is turned on (S91),
Using the commercial power supply line, the battery units 112 and 113 enter a standby state (S92). As a result of the battery state check, if both battery units need to be charged, the battery unit 112 enters the charging mode and the battery unit 113 enters the standby mode (S97).

When the charging is completed while monitoring the state of charge of the battery unit 112, the state returns to the state 92, the commercial power supply line is switched to the battery unit 112 in the discharge output mode, and the battery unit 113 is set to standby (S93). Here, if the battery unit 113 needs to be charged, the battery unit 113 is switched to the charging mode (S94).

While monitoring the state of charge of the battery unit 113,
When the charging is completed, the battery unit 113 enters a standby mode (S
93).

Further, when a charging error of the battery unit 113 in which the charging of the battery unit 113 cannot be completed occurs even after a predetermined charging time has elapsed, a charging error display is performed (S100).
When the discharge of the battery unit 112 has been completed, the battery is switched to a commercial power supply line (S92).

While the battery unit 112 is performing discharge output, the battery unit 113
When the charging of the battery unit 112 is completed, and the discharging of the battery unit 112 proceeds and it is necessary to switch to the battery unit 113, the state S
The process proceeds from step 93 to state S95, where the battery unit 112 is in standby and the battery unit 113 is in discharge output (S95).

Next, the battery unit 112 enters the charging mode,
When charging is completed while monitoring the state of charge, the battery unit 1
12 becomes standby (S95). In the state S96, when a charging error of the battery unit 112 in which the charging of the battery unit 112 cannot be completed occurs even after the predetermined charging time has elapsed, a charging error display is performed (S100), and the battery unit 113 is displayed.
Is completed, the operation is switched to the commercial power supply line (S92).

During the discharge output of the battery unit 113, the battery unit 112
When the charging of the battery unit 113 is completed and the need to switch to the battery unit 112 arises, the state S
The state shifts from 59 to state S93, where the battery unit 113 is in standby and the battery unit 112 is in discharge output (S93).

When the main switch is turned on (S91) and the commercial power supply line is used, the battery units 112 and 113 enter a standby state (S92). Then, if the battery unit 112 is in a fully chargeable or dischargeable state, the process proceeds to S94 via the state S93, and the battery unit 113 is set to the charging mode and the battery unit 112 is set to the discharge output mode (S94).

According to the check result of the battery state, the battery unit 1
If the battery 12 needs to be charged and the battery unit 113 is in a fully chargeable or dischargeable state, the process proceeds to S96 via the state S95, and the battery unit 112 enters the charge mode and the battery unit 113 enters the discharge output mode (S93).

According to the check result of the battery state, the battery unit 1
If the batteries 12 and 113 are in a fully chargeable or dischargeable state, the process proceeds to state S93, in which the battery unit 112 is in the discharge output mode and the battery unit 113 is in a standby state (S93). When the discharge of the battery unit 112 progresses and it is necessary to switch to the battery unit 113, the state shifts from the state S93 to the state S94, and the battery unit 112 is on standby, and the battery unit 113 is in the discharge output (S94).

When the main switch is turned on (S91), the battery units 112 and 113 enter the standby state using the commercial power supply line (S92). According to the battery status check result, if both battery units need to be charged, the battery unit 1
Reference numeral 12 denotes a charging mode, and the battery unit 113 enters a standby mode (S97). When the charging is completed while monitoring the charging state of the battery unit 112, the process returns to the state S92, the commercial power line is switched to the battery unit 112 in the discharge output mode, and the battery unit 113 is set to the standby state (S93).

When a charging error has occurred in the battery section 112, for example, the state shifts from the state S97 to the state S98, a warning is displayed, and the flow shifts to S92. Then, the battery unit 113 enters the charging mode, and the battery unit 112 enters the standby mode (S9).
9). When the charging of the battery unit 113 is completed, the process proceeds to the state S95 via the state S92, and the battery unit 113 enters a discharge output mode, and the battery unit 112 enters a standby state.

In the state S99, the battery unit 113 cannot complete charging even after a predetermined charging time has elapsed.
When a charging error has occurred, a charging error display is performed (S98), and the line is switched to a commercial power supply line (S9).
2). As described above, when a charging error occurs in one of the battery units 112 or 113, a charging operation is performed on the other battery unit, the apparatus is operated using the power of the charged battery unit, and the charging is performed. The battery unit in which an error has occurred is set to a standby state. Also, the battery units 112 and 11
In both cases, if a charging error occurs, both of the battery units 112 and 113 are set to the standby state, and the apparatus is operated using the power of the commercial power supply line.

(Embodiment 3) Battery information indicating the battery state such as charge, discharge, standby, and charge error state of the battery section is stored in a memory RAM (not shown), and is displayed on the operation section liquid crystal panel or by voice or the like. It is characterized by providing battery information to a user or a service person.

FIG. 10 shows a display example of the liquid crystal display panel 81 of the operation unit (not shown). FIGS. 11A to 11E show display examples of a battery state, a commercial power supply line, and the like.

On the display panel 81, the main copy operation modes are shown on a display 82, and a copy magnification display 85, a copy paper selection display 84, and a set number 83 of the number of copies are shown. The state of charge of the battery units 112 and 113 is indicated by the battery display 8.
6 is shown.

For example, the battery states of the battery sections 112 and 113 are shown on the battery display sections 86 and 87. When the commercial power line is used, the display is made on the commercial power display section 88.

That is, (a): when the battery unit is fully charged, (b): when the charge level of the battery unit is less than full charge, (c): when the battery unit is completely discharged (d) : When the battery unit is in use (e): When the commercial power line is in use Also, when the battery unit is in the standby state and is not used to supply power to the device, the corresponding battery unit The display of the battery state of the battery display units 86 and 87 may be blinked to indicate the standby state.

When the main switch 103 is turned on, the CPU 118 is activated by the power supply from the commercial power supply line, and the state of the battery is checked, for example, as in the first embodiment. At this time, the display 82 of the operation unit includes
Display "Battery is being checked." During the warm-up of the device after the battery check is completed, the message “Please wait” is displayed. When the warm-up is completed and the device enters the standby state, the message “Copying is possible.” Is displayed. If an abnormality such as a charging error occurs in the battery state, for example, an error display such as "battery unit 112 error" or "battery unit 113 error" is displayed, and the user is informed of the error state. You can also let them know. At this time, the operation of the apparatus may be prohibited to prompt the service person to perform inspection or repair, or the operation of the apparatus may be permitted as a warning display.

When a battery error such as a charging error occurs in both of the battery units 112 and 113, for example, when it is detected that a predetermined voltage has not been reached even after a certain period of time, "battery error." Display and display the battery units 112 and 1
If one of the errors 13 is an error, the operation of the device is permitted as a warning display such as "Can be copied. The battery unit 112 needs to be inspected." Repair may be encouraged.

Further, the status of the apparatus may be notified by the notifying means 90 by voice.

FIG. 12 shows a configuration example of the notification means 90 by voice. In FIG. 12, reference numeral 118 denotes a CPU unit, and reference numeral 92 denotes a message memory for storing a voice message to be reproduced. Reference numeral 91 denotes an audio reproduction unit that generates an audio signal based on the audio generation data in the message memory 92 under the control of the CPU unit 118.

FIG. 13 shows an example of a device status notification command.

The apparatus status information is transmitted from the CPU 118 to the voice notification means 90 by a predetermined command.
For example, when a charging error occurs in the battery unit 112, a command 06H is issued from the CPU unit 118, interpreted by the audio reproducing unit 91, and stored in the message memory 92 in which predetermined message information is stored in advance. Is read out, and a voice message "Battery unit 112 error." Is reproduced by the speaker 93 arranged near the operation unit to notify the user of the battery charging error.

It is also useful to connect the CPU unit 118 to a computer outside the device via a computer network, a telephone line, or the like. For example, device status information is transmitted by a predetermined command. For example, the battery unit 11
When the charging error of No. 2 occurs, the command 06H of FIG. 13 is issued from the CPU unit 118, and the computer outside the device receives that the charging error of the battery unit 112 has occurred. As described above, by monitoring the state of the apparatus by the external device, the maintenance and inspection work of the service person can be efficiently performed. In particular, due to battery failure,
It is useful not only to improve serviceability but also to prevent danger to the user, as soon as possible to collect danger information such as device ignition and smoke.

(Embodiment 4) FIG. 14 is a sectional view showing the structure of a digital color copying machine to which the present invention is applied. 20
Reference numeral 1 denotes an image scanner unit that reads a document and outputs a digital color image signal. Reference numeral 202 denotes a printer unit that performs an operation for recording the digital color image signal output from the image scanner unit on recording paper.

Reference numeral 203 denotes an original pressure plate for bringing the original into close contact with the original platen glass 4, reference numeral 205 denotes a CCD, and reference numeral 206 denotes a CCD.
Reference numeral 207 denotes a printer control unit having a circuit for driving loads such as various motors of the printer unit. Reference numeral 208 denotes a sample / hold, amplify, and A /
An image processing unit that performs processing such as D conversion, converts the digital signal into, for example, an 8-bit RGB digital signal, performs various processing such as masking processing and γ correction, and sends an image signal to a laser scanning unit. 209 is a fluorescent lamp for irradiating the original, 210 is a reflector for condensing the light of the fluorescent lamp 209 on the original, 211 to 213 are mirrors, 214 is a CCD for reflecting or projecting light from the original.
A lens 215 for condensing light on 205, a carriage 21 for accommodating the fluorescent lamp 209, the reflector 210 and the mirror 211, 21
Reference numeral 6 denotes a carriage that houses the mirrors 212 and 213. 217, a fluorescent lamp control circuit;
A PWM pulse signal with a variable duty is generated at a constant cycle in accordance with the lighting control signal from the CPU and supplied to the fluorescent lamp driving circuit 218.

The fluorescent lamp driving circuit 218 turns on the fluorescent lamp based on the PWM pulse signal. Fluorescent light control circuit 217
Controls the light amount by looking at the output of the light amount sensor 219 and changing the duty of the PWM pulse signal so that this output value becomes a certain value. Note that the carriage 215 has a speed V
The carriage 216 scans (sub-scan) the entire surface of the document by mechanically moving at a speed V / 2 in a direction perpendicular to the electrical scanning (main scanning) direction of the CCD 205.

Reference numeral 220 denotes a photosensitive drum which is driven at a predetermined peripheral speed in a clockwise direction indicated by an arrow. The peripheral surface of the photosensitive drum 220 is charged to a predetermined polarity and potential by a charging roller 221. Then, the laser beam is output from the laser scanning unit 222 to the charged surface. The scanning exposure is performed by the laser light 223 pulse-modulated according to the digital image signal input from the image processing unit, so that an electrostatic latent image of image information is formed. A laser light reflection mirror 224 deflects the laser light from the laser scanning unit 222 with respect to the photosensitive drum 220. Reference numeral 225 denotes a developing device, which is composed of a rotation-changeable color developing device including a yellow toner developing device 225Y, a magenta toner developing device 225M, and a cyan toner developing device 225C, and a black toner developing device 225BK for black.

Reference numeral 226 denotes an intermediate transfer drum. It is arranged in contact with or close to the photosensitive drum 220,
The photosensitive drum 22 rotates in the forward direction with the rotation of the photosensitive drum 220.
It is driven to rotate at substantially the same peripheral speed as 0. Then, formation of an electrostatic latent image corresponding to the color separation image of the target full-color image on the rotating photosensitive drum 220 and toner development of the electrostatic latent image are sequentially performed, and Overlapping transfer is sequentially performed on the intermediate transfer drum 226, and a full-color image corresponding to a mirror image of a target full-color image is formed on the surface of the intermediate transfer drum 226. Reference numeral 227 denotes a cleaner for cleaning the surface of the intermediate transfer drum 226 after the transfer of the toner image to the transfer material. One transfer material P as a recording material is fed from a paper feed cassette 227 to the intermediate transfer drum 226 by a paper feed roller 229, and the intermediate transfer drum 226 is moved toward the intermediate transfer drum 226. Mirror image full-color toner image is transferred to transfer roller 231
And a full-color toner image is formed on the surface of the transfer material P. The transfer roller 231 supplies an electric charge having a polarity opposite to that of the toner from the back surface of the transfer material P, so that the intermediate transfer drum 2
The toner image is transferred from 26 to the transfer material P. The transfer material P to which the full-color toner image has been transferred is transferred to the intermediate transfer drum 22.
6, the toner image is introduced into the fixing device 232, and the toner image is heated and fixed, and is discharged to the discharge tray 232 or 234.

Reference numeral 301 denotes a secondary battery for supplying a plurality of types of voltages to the main body; 302, a DC power supply for converting a commercial power supply into a DC voltage at which the apparatus can operate; and 303, a commercial power supply from an AC outlet. An AC input unit that removes a superimposed noise component and supplies AC 100 V to the DC power supply 102. Reference numeral 304 denotes a voltage from the secondary battery 301 and the DC power supply 3.
This is a power supply switching device that selectively switches the voltage from the power supply 02.

FIG. 2 shows a circuit configuration around the power supply unit and the image processing unit 8 in the embodiment. The original on the platen glass 204 reflects light from the light source 209 and the reflected light is C
Guided by the CD 205 and converted into an electric signal (CCD 2
Reference numeral 05 denotes a color sensor in which RGB color filters are arranged in-line on a one-line CCD in the order of RGB, and a three-line CCD may be used in which an R filter, a G filter, and a B filter are arranged for each CCD. Alternatively, the filter may be on-chip or the filter may have a different structure from the CCD.) And
The electric signal (analog image signal) is supplied to the image processing unit 208.
, Is sampled and held (S / H) by the analog signal processing unit 401, clamps the dark level of the analog image signal to the reference potential, and is amplified to a predetermined amount (the above processing order is not limited to the notation order). / D conversion, for example, to a digital signal of 8 bits each of RGB. The RGB signals are subjected to shading correction and black correction by a shading unit 402, and thereafter, the input masking unit 403 controls the spectral characteristics of the CCD 205 and the light source 20.
9 and the spectral characteristics of the reflector 210 are corrected.

The signal output from the input masking unit 403 is input to the color space compression / background removal / LOG conversion unit 404. The color space compression & background removal & LOG conversion unit 407 determines whether the read image signal is within the range that can be reproduced by the printer. Correct so that it is within the range that can be reproduced with. Then, a background removal process is performed, and the RGB signals are converted into CMY signals by LOG conversion. A UCR & masking unit 405 generates a CMYK signal from the converted CMY signal by the UCR process, and the masking processing unit corrects the converted CMY signal to a signal that is output from the printer. The signal processed by the UCR & masking unit 405 is subjected to density adjustment by the γ
At 07, smoothing or edge processing is performed. The signal processed as described above is sent to the laser scanning unit 222.

On the other hand, usually, FIGS.
As shown in (a), a plurality of types of voltages output from the secondary battery 101 are supplied to each load as a power source of the printer control unit 207, the image processing unit 208, the motor, the clutch, etc. through the switching device 304. . Here, when the secondary battery 301 is pulled out from the printer unit 202 as shown in FIG. 16, the contact of the contact unit 502 of the secondary battery is disconnected, and at the same time, the sensor (or switch) 501 quickly reacts to activate the switching device 304. After switching, the same several kinds of voltages are supplied from the DC power supply 302 to the printer control unit 7, the image processing unit 8, the motor, the clutch, and the like (see FIG. 7B). The removed secondary battery can be charged by connecting it to the charging device 701 as shown in FIG. 18 at a location different from the copying machine main body, and can be replaced with a charged battery without interrupting the copying operation. I can proceed with my work.

(Embodiment 5) In the above embodiment, 2
Even when the secondary battery 301 is removed and the device is operated with the power supplied from the DC power source 302, the processing speed remains the same, so that the power consumption by the commercial power source eventually increases. Therefore, if the capacity of the DC power supply 102 is reduced by temporarily reducing the productivity and reducing the power consumption when the DC power supply 102 is used, the above-mentioned problem is eliminated.

(Embodiment 6) In Embodiments 4 and 5,
The voltage output from the DC power source 302 when the battery is not mounted is the same type as the voltage output from the secondary battery 301. However, even when the battery is mounted, for example, a voltage having a small current capacity is used. However, even if only a voltage having a large current capacity is supplied from the secondary battery 301, a sufficient power saving effect can be obtained. The configuration at this time is basically the same as that of the fourth embodiment.

According to the above-described embodiment, an appropriate battery is automatically selected without depending on whether the user uses a rechargeable battery or a commercial power supply. It is possible to automatically select a commercial power supply line without using a power line.

Further, the rechargeable battery is sufficiently discharged and lowered to an appropriate discharge cut-off voltage before the recharging operation is performed, the state of the battery is appropriately managed, and an appropriate recharging operation is performed. The battery life can be prevented from deteriorating, and the original performance of the battery can be exhibited. Furthermore, since the battery status can be reported, the battery failure of the device, repair and maintenance can be performed appropriately, and the maintenance cost can be reduced, and problems such as a reduction in the operation rate of the device due to downtime can be prevented.

[0120]

As described above, according to the first and sixth aspects of the present invention, it is possible to charge another battery while discharging (supplying) power from one battery.

According to the second and third aspects of the present invention, automatic charging becomes possible by detecting the state of charge of the battery by voltage or the like.

According to the fourth aspect of the present invention, the charging operation can be automatically terminated by detecting the appropriate charging voltage.

According to the fifth aspect of the invention, by storing the value of the appropriate charging voltage, digital control of the voltage becomes possible.

According to the seventh aspect of the invention, it is possible to automatically select a battery to be supplied with power.

According to the eighth aspect of the present invention, a single voltage detecting means can be used by sharing the voltage detecting means for charging and discharging.

According to the ninth aspect of the present invention, it is possible to automatically detect that a state to be charged has occurred by detecting an appropriate discharge end voltage, and perform automatic charging.

According to the tenth aspect of the present invention, the discharge control can be digitally performed by storing the proper discharge end voltage in the storage means.

According to the eleventh aspect, the battery to be charged is 1
With only one battery, power can be supplied from any of the remaining batteries.

According to the twelfth aspect of the present invention, by storing the charge / discharge state in the form of flag information, the battery to be charged and the battery to be discharged can be easily detected with reference to the flag information. When the charge / discharge control is performed by the CPU or the like, the CPU can execute not only the charge / discharge control but also other control processes.

According to the thirteenth aspect of the present invention, not only the charging operation and the discharging operation but also the standby operation are included in the flag information, so that the battery which has not been charged or discharged can be easily detected by the flag information. Can be.

According to the fourteenth aspect of the present invention, by further providing a function of detecting an error in the battery, it is possible to notify the user that the battery has reached the end of its life.

According to the fifteenth aspect, by using a DC power source created from a commercial power source, power can be supplied to the apparatus even when there is no battery.

According to the sixteenth aspect of the present invention, by reducing the productivity, it is possible to contribute to energy saving of the commercial power supply.

According to the seventeenth to nineteenth aspects of the present invention, by using a battery and a commercial power supply together, for example, a power failure of the commercial power supply or a battery error can be mutually complemented. Further, by supplying different voltages from a DC power supply created from a battery and a commercial power supply, the configuration of the DC power supply can be simplified.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a circuit configuration of a power supply control system according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram illustrating a configuration example of a circuit that detects a state of charge of a rechargeable battery.

FIG. 3 is a circuit diagram showing another configuration example of a circuit for detecting a state of charge of a rechargeable battery.

FIG. 4 is a flowchart illustrating a basic operation of the image forming apparatus.

FIG. 5 is a flowchart showing the contents of an initial check operation for checking the state of charge of a battery.

FIG. 6 is an explanatory diagram showing an example of charging characteristics of a rechargeable battery.

FIG. 7 is an explanatory diagram showing an example of discharge characteristics of a rechargeable battery.

FIG. 8 is a block diagram illustrating an example of a start mode switch.

FIG. 9 is an explanatory diagram showing a state transition of power supply switching control of a rechargeable battery and a commercial power supply line.

FIG. 10 is a front view schematically showing an example of an operation panel of an operation unit (not shown).

11A is an explanatory diagram illustrating a display example, FIG. 11B is an explanatory diagram illustrating a display example, FIG. 11C is an explanatory diagram illustrating a display example, and FIG.
Is an explanatory diagram showing a display example, and (e) is an explanatory diagram showing a display example.

FIG. 12 is a block diagram illustrating a configuration example of a notification unit.

FIG. 13 is an explanatory diagram showing the contents of a notification command.

FIG. 14 is a longitudinal sectional view illustrating a configuration of an image forming apparatus according to a second embodiment.

FIG. 15 is a block diagram illustrating a configuration of an image processing system of the image forming apparatus.

FIG. 16 is a perspective view showing a connection state of a battery.

17A is a circuit diagram showing a switching state of the switching device, and FIG. 17B is a circuit diagram showing a switching state of the switching device.

FIG. 18 is an explanatory diagram showing a state of charge of a battery.

[Explanation of symbols]

 Reference Signs List 101 Commercial power supply 102 Noise filter 103 Main switch 104 Smoothing unit 115 Discharge detection unit 116 Charge detection unit 118 CPU unit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5G003 AA01 BA04 CA11 CC02 DA07 DA15 DA17 DA18 EA08 GC05 5G065 AA00 AA01 DA02 DA06 EA02 EA06 GA06 HA16 JA07 KA02 KA05 LA01 MA01 MA09 MA10

Claims (19)

[Claims] 1. A battery comprising: a plurality of rechargeable batteries which can be individually discharged; a rechargeable battery selecting means for selecting a battery to be charged; and a charging means for charging the selected battery with a commercial power supply. A power supply device, characterized in that: 2. The power supply device according to claim 1, further comprising a charge state detecting means for detecting a charge state of the plurality of batteries, wherein the charge means is provided in accordance with the charge state detected by the charge state detect means. A power supply device which performs charging. 3. The power supply device according to claim 1, wherein said state-of-charge detection means detects a discharge voltage of said plurality of batteries as a state of charge. 4. The power supply device according to claim 2, wherein said charging state detecting means detects a proper charging end voltage of the battery, and said charging means stops charging in response to the detection. A power supply device characterized in that: 5. The power supply device according to claim 4, further comprising a storage unit that stores the value of the proper charging end voltage, wherein the state of charge detection unit stores the detected voltage value in the storage unit. A power supply device, which detects that the battery has reached a proper end-of-charge voltage by comparing the measured value with a predetermined value. 6. The power supply device according to claim 1, wherein a battery output selecting means for selecting a battery to be discharged for power supply, and a control means for supplying power to the selected battery. A power supply device further comprising: 7. The power supply device according to claim 6, further comprising discharge state detection means for detecting a discharge state of said plurality of batteries, wherein said battery is charged according to a charge state detected by said discharge state detection means. A power supply device, wherein the output selection means selects a battery to be discharged. 8. A power supply unit, wherein voltage detecting means for detecting the voltage of a battery is shared by the charging state detecting means of claim 2 and the discharging state detecting means of claim 7. 9. The power supply device according to claim 7, wherein said discharge state detection means detects a proper discharge end voltage of a discharged battery. 10. The power supply device according to claim 9, wherein
The battery further includes a storage unit that stores the value of the proper discharge end voltage, and the battery state reaches the proper discharge end voltage by comparing the detected voltage value with the value stored in the storage unit. A power supply device for detecting that the power supply has been performed. 11. The power supply device according to claim 1, wherein the charging unit is configured to charge one of the plurality of batteries,
A power supply device which does not charge other batteries. 12. A plurality of rechargeable batteries which can be individually discharged, a measuring means for measuring the plurality of voltages in time series, and a charge / discharge state of the plurality of batteries based on the measured voltages. Storage means for storing flag information to be indicated, charging battery selection means for selecting a battery to be charged based on the flag information, charging means for charging the selected battery with a commercial power supply, and power supply based on the flag information A power supply device comprising: a battery output selection unit that selects a battery to be discharged for power supply; and a control unit that supplies power to the selected battery. 13. The power supply device according to claim 12, wherein the flag information indicates one of a charging operation, a discharging operation, and a standby operation in which charging and discharging are not performed as the charging state. . 14. The power supply according to claim 1, wherein
A power supply device, further comprising: an error detection unit that detects a charging error; and a unit that outputs an alarm according to the detection. 15. The power supply device according to claim 1, wherein
A DC power supply for converting the commercial power supply to a DC voltage, wherein the plurality of batteries are detachable from the apparatus main body, and when the plurality of batteries are not mounted on the apparatus main body, the DC power supply is used. A power supply device for supplying power. 16. The power supply device according to claim 15, wherein, while the DC power supply is operating, productivity is reduced to reduce power consumption. 17. The power supply device according to claim 15, wherein the D power supply is provided even when the plurality of batteries are mounted.
A power supply device capable of supplying C power. 18. The power supply device according to claim 17, wherein the DC power supply and the plurality of batteries supply different voltages when the plurality of batteries are mounted. 19. The power supply device according to claim 15, wherein the DC power supply and the plurality of batteries supply the same voltage when the plurality of batteries are mounted.