JP6514865B2 - Rechargeable electric device - Google Patents

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 A rechargeable light is known, in which a battery pack containing a chargeable / dischargeable battery can be removably attached, and power is supplied from the attached battery pack to turn on a light (for example, patent documents 1).

  In addition to rechargeable lights, rechargeable electric devices that operate by receiving power from batteries include rechargeable electric tools, vacuum cleaners, gardening tools (such as grass mowers), radios, ... Are known.

JP, 2013-70504, A

  Since a rechargeable battery of this type is provided with a chargeable / dischargeable battery, power is supplied to an external device (for example, a mobile device such as a mobile phone or a smartphone) using the battery, and the external device It is conceivable to be able to charge the internal secondary battery.

  For this purpose, a connector for supplying power to an external device through 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 used via this connector. Power supply to external devices.

  However, in this case, a connector is connected to the power supply circuit provided in the rechargeable electric device, and power supply to the rechargeable electric device and power supply to the external device are simultaneously performed from the common power supply circuit. The output from the power supply circuit is increased to cause problems such as heat generation.

  Therefore, in the present invention, when a connector for supplying power to an external device is provided to a rechargeable electric device that operates by receiving power from a battery, the power is supplied to the external device without causing problems such as heat generation. Aim to be able to do

  In the rechargeable electric device of the present invention made to achieve the above object, a first power supply unit for supplying power to the electric device itself, and a second power supply for supplying power to an external device through a connector Department and are provided. Then, the control unit individually controls the power supply from each power supply unit to each device.

  Therefore, the output from each power supply unit is reduced, as 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, It is possible to suppress the power supply unit from being overheated.

Here, the control unit may be configured to at least individually shut off the power supply from each power supply unit to each device.
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 cut off for each device or power supply unit that does not require power supply. As a result, unnecessary power consumption caused by the operation of each power supply unit can be suppressed.

The control unit may be configured to shut off the power supply from the second power supply unit to the external device when the total of the power supplied from each power supply unit to each device exceeds a predetermined power.
In this way, it is possible to limit the discharge power from the battery while continuing the operation of the rechargeable electric device itself, and to suppress the occurrence of abnormalities such as heat generation as the discharge current from the battery increases. .

The control unit may be configured to shut off the power supply from each power supply unit to each device when the remaining capacity of the battery decreases to a predetermined threshold.
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.

  Also, in this case, the threshold value of the remaining capacity when the control unit shuts off the power supply from the first power supply unit to the electric device, and the control unit shuts off the power supply from the second power supply unit 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, it is possible to first shut off the power supply to the external device, and then shut off the power supply to the electric device, It is possible to operate the electric device longer.

  Also, in this case, once the control unit cuts off the power supply from the second power supply unit to the external device, the second remaining power determination of the battery recovers from the overdischarge determination to the determination that it is not overdischarge. The power supply unit may continue to shut off the power supply to the external device.

  In this way, when the control unit shuts off the power supply to the external device, the power supply to the external device is resumed even if the battery remaining capacity determination recovers from the over-discharge determination to the determination that it is not over-discharge. Because the battery is not restarted, the reduction of the remaining capacity of the battery can be suppressed by the restart. For this reason, it is possible to stably execute the power supply from the first power supply unit to the rechargeable electric device itself.

On the other hand, the rechargeable electric device of the present invention may be provided with a switch for switching the on / off state of the electric device.
Then, in this case, when the electric device is turned on by the switch, the control unit causes the power supply unit to start supplying power to each device, and when the electric device is turned off by the switch, the control unit at least You may make it cut off the electric power supply to the said electric equipment from a 1st power supply part.

  In this case, when power is supplied from each power supply unit to each device, the control unit sums the supplied power from the first power supply unit to the electric device and the supplied power from the second power supply unit to the external device. The amount of power supplied to the electric device may be controlled so as not to exceed the predetermined power.

  In this way, the user can switch the operation / stop of the rechargeable electric device by operating the switch. And, when performing the power supply from each power supply unit to each device, the control unit controls the amount of power supplied to the electric 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 an abnormality such as heat generation.

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

  In this way, when the electric device is in the on state and power is supplied from the power supply units to the devices, the power supplied from the second power supply unit to the external device decreases to a predetermined value, and the external device When it becomes unnecessary to supply power to the user, the user can be notified of that.

  Therefore, for example, in the case where the external device is a portable 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, It is possible to notify the completion of charging to the built-in battery.

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

  Then, in this way, while the power is supplied to the rechargeable electric device, by prohibiting the power supply to the external device, the power from the battery can be supplied simultaneously to the rechargeable electric device and the external device. Overheating of the power supply system can be suppressed.

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 chargeable light of embodiment from the reverse direction to FIG. It is an explanatory view showing the internal structure of the rechargeable light of an embodiment. It is a block diagram showing the circuit composition of the chargeable light of an 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.

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

  The light portion 6 swings in the direction indicated by the arrow in FIGS. 1 and 3 with respect to the gripping portion 4 via the connecting portion 5 formed on one longitudinal end side (upper side in FIGS. 1 to 3) of the gripping portion 4 It is movable and foldable with respect to the grip 4.

  Then, in the light unit 6, a plurality of light emitting elements (LEDs) 10 shown in FIG. 4 are dispersedly disposed on the surface facing the holding unit 4 when folded with respect to the holding unit 4, and light from each light emitting element 10 It radiates to the surroundings.

Moreover, the hook 7 for hooking the rechargeable light 2 on surrounding trees and structures is accommodated 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 to the mounting portion 9 formed on the other end side (lower side in FIGS. 1 to 3) of the grip portion 4 in the longitudinal direction.

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

  As shown in FIG. 3, the holding portion 4 is configured by housing the circuit board 30 and the like in a case 16 made of synthetic resin which is hollow and formed in a shape easy to be held by the user. The circuit board 30 is disposed along the wall surface opposite to the wall surface of the case 16 facing the light portion 6 when the light portion 6 is folded in the grip portion 4.

  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 the back.

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

  Further, in the mounting portion 9 below the grip portion 4, a USB connector 20 for supplying power to an external device (for example, a mobile phone, a smartphone, etc.) capable of supplying power via a USB cable is provided on the rear side. It is done.

  The USB connector 20 is a socket for inserting a USB plug, and has a terminal structure conforming to 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 terminals (5 V, GND) and communication terminals (D−, D +).

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

  Further, as shown in FIGS. 2 and 3, the mounting portion 9 is provided with a cap 22 for protecting the USB connector 20 when an external device is not connected to the USB connector 20. The cap 22 is a cap body 23 inserted into the USB connector 20, a belt portion 24 for attaching the cap body 23 to the mounting portion 9, and a user's operation with a fingertip when removing the cap body 23 from the USB connector 20. And a projection 25 for enabling the movement.

Further, on the front side of the mounting portion 9, a notification LED 28 for notifying of 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 a wire (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 connected to the negative electrode side of the battery 12 via the connection terminal 15. Negative power supply line (ie, ground line) 32 is formed.

  The circuit board 30 is provided with 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. There is.

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

  Further, the voltage conversion circuit 40 is connected between the power supply lines 31-32 when the switching element 38 is in the 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 comprised by the 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 current from flowing into the voltage conversion circuit 40 from the external device connected to the USB connector 20 when the voltage conversion circuit 40 is not operating with the switching element 38 turned off. It is.

  Thus, the switching element 42 is switched between on and off in conjunction with the switching element 38 by the operation of the control circuit 50 described later. The switching elements 34, 38, 42 are each formed of a semiconductor element such as an FET so that the on / off state can be switched by an instruction 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. Detect the current supplied to the external device.

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

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

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

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

Next, control processing 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, the switching elements 38 and 42 are turned on in S110 (S represents a step) to start energization of the voltage conversion circuit 40 and to generate the voltage conversion circuit 40 by energization. Power supply voltage is output from the USB connector 20 to an external device. That is, the power of the external device connected to the USB connector 20 is turned on, and the 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 irradiated 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. Then, in 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 It is determined whether or not the power has become 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 thus the process proceeds to S150. Then, in S150, the battery voltage is measured via the battery voltage measurement circuit 48, and it is determined whether the battery voltage is equal to or greater than a preset threshold K1.

  If it is determined in S150 that the battery voltage is equal to or higher than the threshold K1, the remaining capacity of the battery 12 is sufficient, and it is determined that the power supply to the external device and the light unit 6 can be continued. 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 thus the process proceeds to S160.
When it is determined in S140 that the total power supplied to the external device and the light unit 6 is equal to or higher than the specified power, the discharged power from the battery 12 exceeds the allowable range, and thus the process proceeds to S160. Transition.

  Then, in S160, by turning off the switching elements 38 and 42, energization of the voltage conversion circuit 40 is stopped, and the power supply to the external device is cut off. That is, the power 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 the battery voltage is lower than a preset threshold value K2 (where K2 <K1). When it is determined in S170 that the battery voltage is equal to or higher than the threshold K2, the process of S170 is performed again to monitor the decrease in the battery voltage (in other words, the decrease in the remaining capacity).

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

  Then, in S180, by turning off the switching element 34, the current supply to the constant current circuit 36 is stopped and the power supply to the light unit 6 is cut off. That is, in S180, the power of the light unit 6 is turned off and the light unit 6 is turned off.

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

  Then, the control circuit 50 operates the constant current circuit 36 and the voltage conversion circuit 40 if 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 K1. And permits the power supply to the light unit 6 and the external device.

  In addition, 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 becomes equal to or higher than the specified power, or when the battery voltage becomes less than the threshold K1. Shut off the power supply to external devices.

In this state, since the current path to the voltage conversion circuit 40 is cut off 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 increased and generation of abnormality such as heat generation can be suppressed, and power supply to the light portion 6 and the external device is continued while the remaining capacity of the battery 12 is reduced. As a result, deterioration of the battery 12 can be suppressed.

Further, even if the power supply to the external device is cut off, 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 the light unit 6 can be operated longer.
Also, after cutting off the power supply to the external device, it is only determined whether to stop the energization of the constant current circuit 36 (whether to shut off the power supply to the light unit 6), Even if the battery voltage returns to the threshold value K1 or more, the power supply to the external device is not resumed.

  Therefore, when the power supply to the external device is resumed, the fluctuation of the battery voltage can be suppressed, and the power supply from the constant current circuit 36 to the light unit 6 can be stably implemented.

In the present embodiment, the constant current circuit 36 corresponds to a first power supply unit of the present invention, the voltage conversion circuit 40 corresponds to a second power supply unit of the present invention, and the control circuit 50 corresponds to the present invention. It corresponds to a control unit.
(Modification)
By the way, in the above embodiment, the operation switch 18 is used to switch on / off of the light unit 6 and to adjust the brightness at the time of lighting, and drive / stop of the constant current circuit 36 and the voltage conversion circuit 40 is operated. It has been described that control is performed regardless of the operating state of the switch 18.

  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 power supply from the circuit 36 and the voltage conversion circuit 40 may be cut off.

  And, in this case, when the 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, 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 the power.

Therefore, control processing in the case of controlling the constant current circuit 36 and the voltage conversion circuit 40 as described above 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 to charge the mobile device. Explain as.

  As shown in FIG. 6, in the control process of this modification, it is determined in S200 whether the operation switch 18 is in the on state. Then, if the operation switch 18 is not in the on state, the process proceeds to S310 described later, and if the operation switch 18 is in the on state, the process proceeds to S210.

  In S210, as in the above-described S110, 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 detected by the USB connector 20. Output to an 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 portion 6 is lit. In the following S230, as in the above-described S130, the external Measure the current supplied to the device.

  In S240, as in the case of 140 described above, the total current supplied to the external device and the light portion 6 from the current supplied to the external device measured in S230 and the current supplied from the constant current circuit 36 to the light portion 6 The power is determined, and it is determined whether the total power is equal to or greater 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 based on the measurement result in S230, whether current flows from the voltage conversion circuit 40 to the external device (to external device Determine if there is a supply current of

  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 charging of the external device is completed, and the process proceeds to S270. Transition. When it is determined in S250 that the current supplied to the external device is present, the process directly 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, if it is in the off state) ), The process proceeds to S310.

  Next, when it is determined in S240 that the total power is equal to or higher 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 to light the light unit 6 It is determined whether or not it is current.

  If it is determined in S280 that the output current from constant current circuit 36 is the minimum current, the output current from constant current circuit 36 is further reduced (in other words, the lighting of light portion 6 is darkened). ), And it is determined that the total power can not be reduced to less than the specified power, and the process proceeds to S290.

Then, in S290, by turning off the switching element 34, the current supply to the constant current circuit 36 is stopped, the power supply to the light unit 6 is cut off, and the process proceeds to S270.
When it is determined in S280 that the output current from the constant current circuit 36 does not become the minimum current, the process proceeds to S300, and the output current from the constant current circuit 36 is preset to one stage. By lowering the voltage, the power supplied to the light unit 6 is reduced, and the process proceeds to S230.

  That is, in the present modification, when the total power becomes equal to or higher than the specified power, the supply current from the constant current circuit 36 to the light unit 6 is lowered by a predetermined step (in other words, the lighting of the light unit 6 is darkened ), Reduce the total power.

  At this time, if the current supplied from the constant current circuit 36 to the light unit 6 is the minimum current, the light unit 6 can not be lighted if the current supplied to the light unit 6 is further reduced. Therefore, the power supply from the constant current circuit 36 to the light unit 6 is cut off.

  Next, in S310, which is executed when it is determined that the operation switch 18 is in the off state in S200 or S270, the switching elements 38 and 42 are turned off to stop the energization of the voltage conversion circuit 40. Shut off the power supply to external devices.

  Further, in the subsequent S320, the switching element 34 is turned off to stop the power supply to the constant current circuit 36 and cut off the power supply to the light unit 6, and in the subsequent S330, the notification LED 28 is turned on. , And notify that the charging to the external device is completed. Then, after the process of S330 is performed, the process proceeds to S200 again to repeatedly execute the control process.

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

  For this reason, according to this modification, when the power supplied to the external device increases, the discharge power from the battery 12 is limited to supply the power to the external device without generating an abnormality such as heat generation. Can continue.

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

  Further, in the present modification, it has been described that the power supply to the light unit 6 and the external device is started or stopped according to the on / off state of the operation switch 18. 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 performed according to the on / off state of the operation switch. It may be switched 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 interrupted, and the operation switch 18 is in the off state The power supply from the voltage conversion circuit 40 to the external device may be permitted only when

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

  For example, in the above embodiment, although the present invention is applied to a rechargeable light, the present invention can be used for rechargeable electric power tools, rechargeable gardening tools, rechargeable fans, rechargeable radios, etc. As long as it is a rechargeable electric device provided with a battery, it can be applied as in the above embodiment.

  Further, in the above embodiment, as the rechargeable electric device, the one in which the battery pack having the battery can be detachably attached is described, but the battery is built in the electric device and an external charger is connected. It may be possible 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 determined that the remaining capacity is equal to or more than a predetermined value depending on whether the battery voltage is equal to or higher than a threshold. The remaining capacity of the battery 12 may be detected from the integrated value of the discharge current after full charge of the battery 12 or the like.

  Further, in the above embodiment, the first power supply unit that supplies power to the power receiving type 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 the voltage conversion circuit 40. Is described as being configured. However, the first power supply unit and the second power supply unit may be anything that can supply power to an internal device and an external device to which power is to be supplied, and may be a circuit generally used as a power supply circuit.

  DESCRIPTION OF SYMBOLS 2 ... Rechargeable light, 4 ... grip 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: LED for notification 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 (5)

A rechargeable electric device that operates by receiving power supplied from a chargeable / dischargeable battery,
A first power supply unit for supplying power to internal devices constituting the rechargeable electric device with power supplied from the battery ;
A connector for connecting an external device different from the internal device ;
A second power supply unit connected to the connector for supplying power to the external device connected to the connector with power supplied from the battery ;
A control unit that switches whether to supply or not supply power from the first power supply unit to the internal device and to supply power from the second power supply unit to the external device ;
Equipped with
The control unit
When the remaining capacity of the battery decreases to a first threshold when power is supplied from the first power supply unit and the second power supply unit to the internal device and the external device, the second power supply unit When the power supply to the external device is shut off and the remaining capacity of the battery decreases to a second threshold smaller than the first threshold, the power supply from the first power supply unit to the internal device is shut off,
In addition, once power supply from the second power supply unit to the external device is interrupted, the second power supply unit transfers the external device to the external device even if the remaining capacity of the battery recovers to the first threshold or more. A rechargeable electrical device that is configured to continue shutting down the power supply. A rechargeable electric device according to claim 1 , wherein
The control unit is configured to control the second power supply unit when a total power of the power supplied from the first power supply unit to the internal device and the power supplied from the second power supply unit to the external device exceeds a predetermined power. And a rechargeable electric device configured to cut off the power supply to the external device. A rechargeable electric device that operates by receiving power supplied from a chargeable / dischargeable battery,
A first power supply unit for supplying power to internal devices constituting the rechargeable electric device with power supplied from the battery ;
A connector for connecting an external device different from the internal device ;
A second power supply unit connected to the connector for supplying power to the external device connected to the connector with power supplied from the battery ;
A control unit that switches whether to supply or not supply power from the first power supply unit to the internal device and to supply power from the second power supply unit to the external device ;
A switch for switching the on / off state of the rechargeable electric device;
Equipped with
The control unit
When the switch is turned on , power is supplied from the first power supply unit and the second power supply unit to the internal device and the external device, respectively. When the switch is turned off , at least the first power supply unit is turned on. Power supply to the internal device from the
Moreover, when power is supplied from the first power supply unit and the second power supply unit to the internal device and the external device, the power supplied from the first power supply unit to the internal device and the external device from the second power supply unit When the total power with the power supplied to the power supply exceeds a predetermined power, the total power is limited to the predetermined power or less by reducing the power supplied from the first power supply unit to the internal device.
It is configured to be a rechargeable electrical device. A rechargeable electric device according to claim 3, wherein
The control unit
When the switch is turned off , power supply from the first power supply unit and the second power supply unit to the internal device and the external device is cut off , respectively .
When power supplied from the second power supply unit to the external device decreases to a predetermined value at the time of power supply from the first power supply unit and the second power supply unit to the internal device and the external device, notification of that fact is provided. It is configured to be a rechargeable electrical device. A rechargeable electric device that operates by receiving power supplied from a chargeable / dischargeable battery,
A first power supply unit for supplying power to internal devices constituting the rechargeable electric device with power supplied from the battery ;
A connector for connecting an external device different from the internal device ;
A second power supply unit connected to the connector for supplying power to the external device connected to the connector with power supplied from the battery ;
A control unit that switches whether to supply or not supply power from the first power supply unit to the internal device and to supply power from the second power supply unit to the external device ;
A switch for switching the on / off state of the rechargeable electric device;
Equipped with
Wherein, when the switch is turned on, said from the first power supply unit is carried out power supply to the internal devices, cut off the power supply to the external device from the second power supply unit, said switch The rechargeable battery is configured to cut off the power supply from the first power supply unit to the internal device and to execute the power supply from the second power supply unit to the external device when the power supply is turned off. Electrical equipment.