JP2016052185A - Charging type electric apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable power supply to an external apparatus without causing a trouble such as exothermic, when a connector for supplying power to the external apparatus is provided for a charging type electric apparatus.SOLUTION: In a charging type light which operates by receiving power from a battery 12, a power supply unit for supplying power to the light unit 6 of the charging type light and a power supply unit for supplying power to an external apparatus through a USB connector 20 are configured separately by a constant current circuit 36a and a voltage conversion circuit 40. A control circuit 50 is configured to individually control the power supply from the constant current circuit 36 to the light unit 6 and the power supply from the voltage conversion circuit 40 to the external apparatus.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a rechargeable electric device that operates by receiving power supply from a chargeable / dischargeable battery.

  2. Description of the Related Art Conventionally, a rechargeable light is known in which a battery pack containing a chargeable / dischargeable battery can be detachably attached and power is supplied from the attached battery pack to turn on the light (for example, Patent Documents). 1).

  In addition to rechargeable lights, rechargeable electric devices that operate with power supplied from batteries include rechargeable electric tools, vacuum cleaners, garden tools (such as mowers), radios, and so on. Are known.

JP 2013-70504 A

  Since this type of rechargeable electric device is provided with a chargeable / dischargeable battery, the battery is used to supply power to an external device (for example, a mobile device such as a mobile phone or a smartphone). It is conceivable to make it possible to charge the secondary battery.

  For this purpose, a connector for supplying power to the external device via a predetermined cable, such as a socket for inserting a USB (Universal Serial Bus) plug, is provided in the rechargeable electric device, and the connector is connected via this connector. Power can be supplied to external devices.

  However, in this case, if a connector is connected to the power supply circuit provided in the rechargeable electrical device, the power supply to the rechargeable electrical device and the power supply to the external device are performed simultaneously from the common power supply circuit. As a result, the output from the power supply circuit becomes large, causing problems such as heat generation.

  Accordingly, the present invention supplies power to an external device without causing problems such as heat generation when a connector for supplying power to the external device is provided in a rechargeable electrical device that operates by receiving power supply from a battery. The purpose is to be able to perform.

  In the rechargeable electric device of the present invention made to achieve such an object, a first power supply unit for supplying electric power to the electric device itself, and a second power supply for supplying electric power to an external device via a connector Are provided. The control unit individually controls power supply from each power supply unit to each device.

  For this reason, compared with the case where the power supply to the electric device itself and the power supply to the external device are simultaneously performed using a common power supply circuit, the output from each power supply unit is reduced, It is possible to suppress the power supply unit from being overheated.

Here, you may comprise a control part so that the electric power supply from each power supply part to each apparatus can be interrupted | blocked separately at least.
In this way, for example, when power supply to the electric device itself is unnecessary or when power supply to the external device is unnecessary, the power supply is interrupted for each device or power supply unit that does not require power supply. Therefore, unnecessary power consumption caused by the operation of each power supply unit can be suppressed.

Further, the control unit may be configured to cut off the power supply from the second power supply unit to the external device when the total power supplied from each power supply unit to each device exceeds a predetermined power.
In this way, while the operation of the rechargeable electric device itself is continued, the discharge power from the battery can be limited to suppress the occurrence of abnormalities such as heat generation due to the increase in the discharge current from the battery. .

In addition, the control unit may be configured to cut off the power supply from each power supply unit to each device when the remaining capacity of the battery is reduced to a predetermined threshold value.
In this case, the battery can be protected from overdischarge by setting the threshold for determining the remaining capacity of the battery as the threshold for overdischarge determination.

  In this case, the control unit sets the threshold of the remaining capacity when the power supply from the first power supply unit to the electric device is cut off, and the control unit uses the second power supply unit from the power supply to the external device. You may set to a value smaller than the threshold value of remaining capacity.

  In this way, when the remaining capacity of the battery is decreasing, the power supply to the external device can be interrupted first, and then the power supply to the electrical device can be interrupted. It is possible to operate the electric device for a longer time.

  Further, in this case, once the control unit temporarily cuts off the power supply from the second power supply unit to the external device, even if the remaining capacity determination of the battery recovers from the overdischarge determination to the determination that is not overdischarge, You may comprise so that interruption | blocking of the electric power supply to an external apparatus from a power supply part may be continued.

  In this way, the power supply to the external device is resumed even if the remaining capacity determination of the battery recovers from the overdischarge determination to the determination that it is not overdischarged by the control unit shutting off the power supply to the external device. Therefore, it is possible to prevent the remaining capacity of the battery from further decreasing due to the restart. For this reason, the power supply from the first power supply unit to the rechargeable electric device itself can be stably executed.

On the other hand, the rechargeable electric device of the present invention may include a switch for switching the on / off state of the electric device.
In this case, when the electrical device is turned on by the switch, the control unit starts power supply from each power supply unit to each device, and when the electrical device is turned off by the switch, the control unit You may make it interrupt | block the electric power supply to the said electric equipment from a 1st power supply part.

  Further, in this case, when supplying power from each power supply unit to each device, the control unit calculates the sum of the power supplied from the first power supply unit to the electrical device and the power supplied from the second power supply unit to the external device. The power supply amount to the electric device may be controlled so as not to exceed the predetermined power.

  If it does in this way, the user can switch operation / stop of a rechargeable electric equipment by operating a switch. And, when performing power supply from each power supply unit to each device, the control unit controls the amount of power supplied to the electrical device so that the total of the supplied power does not exceed the predetermined power, While continuing the power supply to the external device, the discharge power from the battery can be limited to suppress the occurrence of abnormality such as heat generation.

  Further, in this case, when the electrical device is turned off by the switch, the control unit cuts off the power supply from each power supply unit to each device, and at the time of power supply from each power supply unit to each device, When the power supplied from the power supply unit to the external device decreases to a predetermined value, a notification to that effect may be made.

  In this way, when power is supplied from each power supply unit to each device while the electrical device is on, the power supplied from the second power supply unit to the external device decreases to a predetermined value, and the external device When it is no longer necessary to supply power to the user, it can be notified to the user.

  For this reason, for example, when the external device is a mobile device such as a mobile phone or a smartphone and is configured to receive power supply from the second power supply unit and charge the built-in battery, The completion of charging the built-in battery can be notified.

  Next, in the case where the rechargeable electric device is provided with a switch for switching the on / off state of the electric device, the control unit, when the electric device is turned on by the switch, from the first power supply unit The power supply to the electric device may be performed, and the power supply from the second power supply unit to the external device may be prohibited.

  And, in this way, while supplying power to the rechargeable electric device, by prohibiting the power supply to the external device, by simultaneously supplying power to the rechargeable electric device and the external device, each device from the battery It is possible to prevent the power supply system from becoming overheated.

It is a perspective view showing the appearance of the rechargeable light of an embodiment. It is a perspective view showing the state which looked at the rechargeable light of an embodiment from the direction opposite to FIG. It is explanatory drawing showing the internal structure of the rechargeable light of embodiment. It is a block diagram showing the circuit structure of the rechargeable light of the embodiment. It is a flowchart showing the control processing performed by MCU. It is a flowchart showing the modification of the control processing performed by MCU.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 to 3, the rechargeable light 2 of the present embodiment includes a grip portion 4 formed in a rod shape that can be gripped by a user, and a light portion provided on one end in the longitudinal direction of the grip portion 4. 6 and a battery pack 8 detachably mounted on the other end in the longitudinal direction of the grip portion 4.

  The light unit 6 swings in the direction indicated by the arrows in FIGS. 1 and 3 with respect to the gripping part 4 via a connecting part 5 formed on one end in the longitudinal direction of the gripping part 4 (upward in FIGS. 1 to 3). It is provided so as to be movable and foldable with respect to the grip portion 4.

  A plurality of light emitting elements (LEDs) 10 shown in FIG. 4 are distributed on the surface of the light unit 6 that faces the gripping unit 4 when folded with respect to the gripping unit 4. Is radiated to the surroundings.

A hook 7 for hooking the rechargeable light 2 on the surrounding tree or structure is housed on the surface of the light portion 6 opposite to the light emitting element 10.
Next, the battery pack 8 incorporates a chargeable / dischargeable battery 12 (see FIG. 4) such as a lithium ion battery. The battery pack 8 is detachably mounted on a mounting portion 9 formed on the other end in the longitudinal direction of the grip portion 4 (downward in FIGS. 1 to 3).

  When the battery pack 8 is attached to the attachment portion 9, the battery 12 is connected to the circuit board 30 (see FIG. 4) in the grip portion 4 via connection terminals 14 and 15 (see FIG. 4) provided in the attachment portion 9. 3).

  As shown in FIG. 3, the grip portion 4 is configured by housing a circuit board 30 and the like in a case 16 made of a synthetic resin that is hollow and is formed in a shape that is easy for a user to grip. And the circuit board 30 is arrange | positioned in the holding part 4 along the wall surface on the opposite side to the wall surface of the case 16 which opposes the light part 6 when the light part 6 is folded.

  In the following description, in the grip portion 4, when the light portion 6 is folded, the wall surface side of the case 16 facing the light portion 6 is the front of the rechargeable light 2, and the opposite side is the rechargeable light 2. It is called back.

  An operation switch 18 for switching the on / off state of the rechargeable light 2 when the user presses is provided on the wall surface of the case 16 facing the circuit board 30 behind the grip portion 4. ing. The operation switch 18 is connected to the circuit board 30.

  In addition, a USB connector 20 for supplying power to an external device (for example, a mobile phone or a smartphone) that can supply power via a USB cable is provided on the rear side of the mounting portion 9 below the grip portion 4. It has been.

  The USB connector 20 is a socket into which a USB plug is inserted, and has a terminal structure compliant with the USB (Universal Serial Bus) standard. That is, as shown in FIG. 4, the USB connector 20 includes a pair of positive and negative power supply terminals (5V, GND) and communication terminals (D−, D +).

  In this embodiment, since the USB connector 20 is used for power supply to an external device, the communication terminals (D−, D +) are connected to each other, and the power supply terminals (5V, GND) sandwiching the communication terminals are connected. Used as a power supply terminal.

  As shown in FIGS. 2 and 3, the mounting portion 9 is provided with a cap 22 that protects the USB connector 20 when an external device is not connected to the USB connector 20. The cap 22 is operated by a fingertip when the cap body 23 is inserted into the USB connector 20, the belt portion 24 for attaching the cap body 23 to the mounting portion 9, and the cap body 23 is removed from the USB connector 20. And a protrusion 25 for enabling.

In addition, on the front side of the mounting portion 9, a notification LED 28 for notifying the state of the rechargeable light 2 such as a decrease in the remaining capacity of the battery 12 is provided.
The USB connector 20 and the notification LED 28 are connected to the circuit board 30 via wiring (not shown) in the case 16.

  As shown in FIG. 4, the circuit board 30 is connected to the positive power supply line 31 connected to the positive electrode side of the battery 12 via the connection terminal 14 and to the negative electrode side of the battery 12 via the connection terminal 15. A negative power supply line (that is, a ground line) 32 is formed.

  The circuit board 30 includes a constant current circuit 36, a voltage conversion circuit 40, a current detection circuit 44, an external device detection circuit 46, a battery voltage measurement circuit 48, a control circuit 50, and a power supply voltage generation circuit 52. Yes.

  Here, the constant current circuit 36 is connected between the power supply lines 31-32 when the switching element 34 is in the ON state, and supplies a constant current to the light emitting element 10 in the light unit 6 to make the light unit 6 It is to light up.

  The voltage conversion circuit 40 is connected between the power supply lines 31-32 when the switching element 38 is in an on state, and supplies a predetermined power supply voltage (5 V) to the positive power supply terminal of the USB connector 20. For example, it is constituted by a DC-DC converter.

  A switching element 42 is provided in the output path of the power supply voltage (5 V) from the voltage conversion circuit 40 to the USB connector 20. This is to prevent a current from flowing into the voltage conversion circuit 40 from an external device connected to the USB connector 20 when the switching element 38 is off and the voltage conversion circuit 40 stops operating. It is.

  Therefore, the switching element 42 is switched between on and off states in conjunction with the switching element 38 by the operation of the control circuit 50 described later. The switching elements 34, 38, and 42 are each composed of a semiconductor element such as an FET so that the on / off state can be switched by a command from the control circuit 50.

  Next, the ground line 32 is connected to the negative power supply terminal (GND) of the USB connector 20, and the current detection circuit 44 is connected to the current flowing through the ground line 32, that is, from the battery 12 to the USB connector 20. Detects current supplied to external devices.

  Also, the external device detection circuit 46 is connected to the USB connector 20 from the current flowing into the positive power supply terminal of the USB connector 20 or the voltage change of the power supply terminal when the switching element 42 is in the off state. It is for detecting.

  The battery voltage measurement circuit 48 is provided between the power supply lines 31-32 and is used to measure the output voltage (battery voltage) of the battery 12 connected to the connection terminals 14 and 15.

A detection signal from the current detection circuit 44, the external device detection circuit 46, and the battery voltage measurement circuit 48 and an input signal from the operation switch 18 are input to the control circuit 50.
The control circuit 50 is for turning on the light unit 6 and supplying power to an external device based on signals input from these units, and is configured by an MCU (Micro Control Unit).

  The power supply voltage generation circuit 52 is for supplying a power supply voltage (DC constant voltage) Vcc for operation to the control circuit 50 and the external device detection circuit 46, and is connected via positive and negative power supply lines 31 and 32. The power supply voltage Vcc is generated by the power supplied from the battery 12.

Next, the control process executed by the control circuit 50 will be described along the flowchart shown in FIG.
The control process shown in FIG. 5 is a process executed as one of the main routines when the power supply voltage Vcc is supplied from the power supply voltage generation circuit 52 and the control circuit 50 is operating.

In this control process, first, in S110 (S represents a step), the switching elements 38 and 42 are turned on to start energization to the voltage conversion circuit 40 and to be generated by energization to the voltage conversion circuit 40. The power supply voltage is output from the USB connector 20 to an external device. That is, the external device connected to the USB connector 20 is turned on, and power supply to the external device is started.

  Next, in S120, the switching element 34 is turned on to start energization of the constant current circuit 36. As a result, the constant current circuit 36 supplies a predetermined constant current to the light emitting element (LED) 10 of the light unit 6 to light the light unit 6.

  The value of the current supplied to the light unit 6 by the constant current circuit 36 (in other words, the amount of light emitted from the light unit 6) is controlled by the control circuit 50. That is, the control circuit 50 sets the supply current from the constant current circuit 36 to the light unit 6 according to the brightness designated via the operation switch 18.

  Next, in S130, the current supplied from the USB connector 20 to the external device is measured via the current detection circuit 44. In subsequent S140, the total power supplied to the external device and the light unit 6 is obtained from the measured supply current to the external device and the supply current from the constant current circuit 36 to the light unit 6, and the total power Is determined to be equal to or greater than a preset specified power.

  If it is determined in S140 that the total power is less than the specified power, the discharge power from the battery 12 is within the allowable range, and the process proceeds to S150. In S150, the battery voltage is measured via the battery voltage measurement circuit 48, and it is determined whether or not the battery voltage is equal to or higher than a preset threshold value K1.

  If it is determined in S150 that the battery voltage is equal to or higher than the threshold value K1, it is determined that the remaining capacity of the battery 12 is sufficient and the power supply to the external device and the light unit 6 can be continued, and then again in S130. Migrate to

On the other hand, if it is determined in S150 that the battery voltage is less than the threshold value K1, the remaining capacity of the battery 12 is reduced, and the process proceeds to S160.
In S140, when it is determined that the total power supplied to the external device and the light unit 6 is equal to or higher than the specified power, the discharge power from the battery 12 exceeds the allowable range. Transition.

  In S160, the switching elements 38 and 42 are turned off to stop energization of the voltage conversion circuit 40 and cut off the power supply to the external device. That is, the power supply of the external device connected to the USB connector 20 is turned off, and the power supply to the external device is cut off.

  Next, in S170, it is determined whether or not the battery voltage is lower than a preset threshold value K2 (where K2 <K1). If it is determined in S170 that the battery voltage is equal to or higher than the threshold value K2, the process of S170 is executed again to monitor a decrease in battery voltage (in other words, a decrease in remaining capacity).

  On the other hand, if it is determined in S170 that the battery voltage is less than the threshold K2, it is determined that the battery 12 will be deteriorated if the discharge to the light unit 6 is continued, and the process proceeds to S180.

  In S180, the switching element 34 is turned off to stop energization of the constant current circuit 36 and cut off the power supply to the light unit 6. That is, in S180, the light unit 6 is turned off and the light unit 6 is turned off.

As described above, the rechargeable light 2 of the present embodiment has a constant current circuit 36 for supplying power to its own light unit 6 and a voltage for supplying power to an external device connected to the USB connector 20. A conversion circuit 40 is provided.

  The control circuit 50 operates the constant current circuit 36 and the voltage conversion circuit 40 when the total power consumed by the light unit 6 and the external device is less than the specified power and the battery voltage is equal to or higher than the threshold value K1. The power supply to the light unit 6 and the external device is permitted.

  Further, the control circuit 50 stops the operation of the voltage conversion circuit 40 when the total power consumed by the light unit 6 and the external device is equal to or higher than the specified power, or when the battery voltage is less than the threshold value K1, Shut off power supply to external equipment.

In this state, since the energization path to the voltage conversion circuit 40 is interrupted by the switching element 38, the power supply to the voltage conversion circuit 40 is also stopped.
As a result, the discharge current from the battery 12 can be prevented from increasing and abnormalities such as heat generation can be suppressed, and power supply to the light unit 6 and the external device can be continued in a state where the remaining capacity of the battery 12 is reduced. As a result, the battery 12 can be prevented from deteriorating.

Even if the power supply to the external device is interrupted, if the battery voltage is equal to or higher than the threshold value K2, the power supply to the light unit 6 is continued, so that the light unit 6 can be operated longer.
In addition, after cutting off the power supply to the external device, it is only necessary to determine whether to stop energizing the constant current circuit 36 (whether to cut off the power supply to the light unit 6). Even if the battery voltage returns to the threshold value K1 or higher, the power supply to the external device is not resumed.

  For this reason, by restarting the power supply to the external device, it is possible to suppress the battery voltage from fluctuating and to stably carry out the power supply from the constant current circuit 36 to the light unit 6.

In the present embodiment, the constant current circuit 36 corresponds to the first power supply unit of the present invention, the voltage conversion circuit 40 corresponds to the second power supply unit of the present invention, and the control circuit 50 corresponds to the present invention. It corresponds to the control unit.
(Modification)
By the way, in the above embodiment, the operation switch 18 is used for switching on / off of the light unit 6 and adjusting the brightness at the time of lighting, and the driving / stopping of the constant current circuit 36 and the voltage conversion circuit 40 is the operation. In the above description, the switch 18 is controlled regardless of the operation state.

  However, when the operation switch 18 is in the ON state, power supply from the constant current circuit 36 and the voltage conversion circuit 40 to the light unit 6 and the external device is permitted, and when the operation switch 18 is in the OFF state, the constant current The power supply from the circuit 36 and the voltage conversion circuit 40 may be cut off.

  In this case, when the power supply from the constant current circuit 36 and the voltage conversion circuit 40 is permitted to the light unit 6 and the external device, the supply to the light unit 6 is performed so that the total power does not exceed the specified power. It is good to control electric power.

Therefore, control processing in the case of controlling the constant current circuit 36 and the voltage conversion circuit 40 in this way will be described as a modification of the above embodiment.
In the following description, the external device connected to the USB connector 20 is a mobile device such as a mobile phone or a smartphone, and the voltage conversion circuit 40 as the second power supply unit is used for charging the mobile device. Will be described.

  As shown in FIG. 6, in the control process of this modification, it is determined in S200 whether or not the operation switch 18 is in the on state. If the operation switch 18 is not turned on, the process proceeds to S310, which will be described later. If the operation switch 18 is turned on, the process proceeds to S210.

  In S210, as in S110 described above, the switching elements 38 and 42 are turned on to start energization of the voltage conversion circuit 40, and the power supply voltage generated by energization of the voltage conversion circuit 40 is supplied to the USB connector 20. Output to the external device.

  In the subsequent S220, as in the above-described S120, the switching element 34 is turned on to start energization of the constant current circuit 36, and the light unit 6 is turned on. In the subsequent S230, as in the above-described S130, the external Measure the supply current to the equipment.

  In S240, similar to 140 described above, the total current supplied to the external device and the light unit 6 from the supply current to the external device measured in S230 and the supply current from the constant current circuit 36 to the light unit 6 is calculated. The power is obtained, and it is determined whether or not the total power is equal to or higher than a preset specified power.

  If it is determined in S240 that the total power is less than the specified power, the process proceeds to S250, and whether or not current is flowing from the voltage conversion circuit 40 to the external device based on the measurement result in S230 (to the external device). Whether or not there is a supply current.

  When it is determined in S250 that there is no supply current to the external device, the process proceeds to S260, and the notification LED 28 is turned on to notify that the charging to the external device is completed, and to S270. Transition. If it is determined in S250 that there is a current supplied to the external device, the process proceeds to S270.

  In S270, it is determined whether or not the operation switch 18 is in the on state. If the operation switch 18 is in the on state, the process proceeds to S230, and if the operation switch 18 is not in the on state (that is, in the off state). And the process proceeds to S310.

  Next, when it is determined in S240 that the total power is equal to or greater than the specified power, the process proceeds to S280, and the output current from the constant current circuit 36 to the light unit 6 is the minimum required for lighting the light unit 6. It is determined whether or not current is applied.

  When it is determined in S280 that the output current from the constant current circuit 36 is the minimum current, the output current from the constant current circuit 36 is further reduced (in other words, the lighting of the light unit 6 is dimmed). Therefore, it is determined that the total power cannot be reduced below the specified power, and the process proceeds to S290.

In S290, the switching element 34 is turned off to stop the energization of the constant current circuit 36, the power supply to the light unit 6 is cut off, and the process proceeds to S270.
If it is determined in S280 that the output current from the constant current circuit 36 is not the lowest current, the process proceeds to S300, where the output current from the constant current circuit 36 is set in one step set in advance. By lowering, the power supplied to the light unit 6 is reduced, and the process proceeds to S230.

  In other words, in this modification, when the total power exceeds the specified power, the current supplied from the constant current circuit 36 to the light unit 6 is lowered by a predetermined level (in other words, the lighting of the light unit 6 is made dark). ) Reduce the total power.

  At this time, if the supply current from the constant current circuit 36 to the light unit 6 is the lowest current, the light unit 6 cannot be turned on if the supply current to the light unit 6 is further reduced. Therefore, power supply from the constant current circuit 36 to the light unit 6 is cut off.

  Next, in S310 executed when it is determined in S200 or S270 that the operation switch 18 is in the OFF state, the energization to the voltage conversion circuit 40 is stopped by turning off the switching elements 38 and 42, Shut off power supply to external equipment.

  In the subsequent S320, the switching element 34 is turned off to stop the energization of the constant current circuit 36, the power supply to the light unit 6 is cut off, and in the subsequent S330, the notification LED 28 is turned on. Informs that the charging to the external device is completed. Then, after executing the process of S330, the control process is repeatedly executed by moving to S200 again.

  As described above, in this modification, whether to supply power to the light unit 6 and the external device from the constant current circuit 36 and the voltage conversion circuit 40 is switched according to the on / off state of the operation switch 18. . Then, when power is supplied to the light unit 6 and the external device, the power supplied to the light unit 6 is controlled so that the total power does not exceed the specified power.

  For this reason, according to the present modification, when the power supplied to the external device increases, the power supplied to the external device without causing an abnormality such as heat generation by limiting the discharge power from the battery 12. Can continue.

In addition, when the charging to the external device is completed, the notification LED 28 is turned on to notify the fact, so that the usability at the time of charging the external device can be improved.
In the present modification, the power supply to the light unit 6 and the external device is cut off when the operation switch 18 is turned off. However, only the power supply to the light unit 6 is cut off to the external device. The power supply may be continued.

  Moreover, in this modification, it demonstrated as what starts or stops the electric power supply to the light part 6 and an external apparatus according to the ON / OFF state of the operation switch 18. FIG. On the other hand, two operation switches for switching the power supply to the light unit 6 and the external device are provided, and the power supply to the light unit 6 and the external device is individually controlled according to the on / off state of the operation switch. You may make it switch to.

  Further, when the operation switch 18 is in the on state, the power supply from the constant current circuit 36 to the light unit 6 is performed, the power supply from the voltage conversion circuit 40 to the external device is cut off, and the operation switch 18 is in the off state. Only when this is the case, the power supply from the voltage conversion circuit 40 to the external device may be permitted.

  As mentioned above, although embodiment and the modification of this invention were described, this invention is not limited to the said embodiment, A various aspect can be taken in the range which does not deviate from the summary of this invention. .

  For example, in the above embodiment, the present invention is applied to a rechargeable light. However, the present invention is chargeable / dischargeable such as a rechargeable electric tool, a rechargeable garden tool, a rechargeable fan, a rechargeable radio, etc. Any rechargeable electric device including a battery can be applied in the same manner as in the above embodiment.

  Moreover, in the said embodiment, although what can attach the battery pack provided with the battery detachably was demonstrated as a rechargeable electric equipment, the battery is incorporated in the electric equipment and connects an external charger. You may be able to charge it.

  In the above embodiment, the battery voltage is detected as a parameter representing the remaining capacity of the battery 12, and it is described as determining whether the remaining capacity is equal to or greater than a predetermined value based on whether the battery voltage is equal to or greater than a threshold value. The remaining capacity of the battery 12 may be detected from the integrated value of the discharge current after the battery 12 is fully charged.

  In the above embodiment, the first power supply unit that supplies power to the power receiving electric device itself is configured by the constant current circuit 36, and the second power supply unit that supplies power to the external device is connected to the voltage conversion circuit 40. It was explained as being configured. However, the first power supply unit and the second power supply unit may be any circuit that can supply power to the internal device and the external device to be supplied with power, and may be any circuit that is generally used as a power supply circuit.

  DESCRIPTION OF SYMBOLS 2 ... Rechargeable light, 4 ... Holding part, 5 ... Connection part, 6 ... Light part, 7 ... Hook, 8 ... Battery pack, 9 ... Mounting part, 10 ... Light emitting element, 12 ... Battery, 14, 15 ... Connection terminal , 16 ... Case, 18 ... Operation switch, 20 ... USB connector, 22 ... Cap, 28 ... Notification LED, 30 ... Circuit board, 31 ... Power line, 32 ... Ground line, 34, 38, 42 ... Switching element, 36 ... constant current circuit, 40 ... voltage conversion circuit, 44 ... current detection circuit, 46 ... external device detection circuit, 48 ... battery voltage measurement circuit, 50 ... control circuit, 52 ... power supply voltage generation circuit.

Claims (9)

A rechargeable electric device that operates by receiving power from a chargeable / dischargeable battery,
A first power supply for supplying power to the electrical device;
A connector for connecting an external device;
A second power supply unit for supplying power to the external device via the connector;
A control unit for individually controlling power supply from each power supply unit to each device;
A rechargeable electrical device. The rechargeable electric device according to claim 1,
The control unit is a rechargeable electric device configured to be able to individually block power supply from the power supply units to the devices. The rechargeable electric device according to claim 2,
The control unit is configured to cut off power supply from the second power supply unit to the external device when the total power supplied from the power supply units to the devices exceeds a predetermined power. Rechargeable electrical equipment. The rechargeable electric device according to claim 2 or claim 3,
The control unit is a rechargeable electric device configured to cut off power supply from each power supply unit to each device when the remaining capacity of the battery decreases to a predetermined threshold. The rechargeable electric device according to claim 4,
The threshold value of the remaining capacity when the control unit cuts off the power supply from the first power supply unit to the electric device is the value when the control unit cuts off the power supply from the second power supply unit to the external device. The rechargeable electric device is set to a value smaller than a threshold value of the remaining capacity. The rechargeable electric device according to claim 5,
The control unit once cuts off the power supply from the second power supply unit to the external device, and thereafter, from the second power supply unit to the external device even if the remaining capacity of the battery recovers to the threshold value or more. A rechargeable electrical device configured to continue to shut off the power supply. The rechargeable electric device according to claim 1,
Provided with a switch for switching the electrical device on / off,
The controller is
When the electrical device is turned on by the switch, power supply from the power supply units to the devices is started, and when the electrical device is turned off by the switch, at least the electrical device from the first power supply unit. Shut off the power supply to
In addition, when power is supplied from each power supply unit to each device, a total of power supplied from the first power supply unit to the electrical device and power supplied from the second power supply unit to the external device is predetermined. Control the power supplied to the electrical equipment so that it does not exceed the power.
Rechargeable electrical equipment configured as follows. The rechargeable electric device according to claim 7,
The controller is
When the electrical device is turned off by the switch, the power supply from each power supply unit to each device is interrupted,
When the power supplied from the second power supply unit to the external device is reduced to a predetermined value during the power supply from each power supply unit to each device, the fact is notified.
A rechargeable electrical device configured as described above. The rechargeable electric device according to claim 1,
Provided with a switch for switching the electrical device on / off,
When the electrical device is turned on by the switch, the control unit supplies power from the first power supply unit to the electrical device and prohibits power supply from the second power supply unit to the external device. Configured, rechargeable electrical equipment.