Portable automatic power storage feeding device

Abstract

To solve a problem in which the feeding system cannot be switched easily.SOLUTION: In a portable automatic power storage feeding device provided with a battery pack, a generator, and a control device that controls power output to the outside from the battery pack or the generator, the device is provided with mode specifying means for outputting a given specification signal to the control device, and the control device is set, on the basis of the specification signal output by the mode specifying means, to any one of a battery feeding mode for outputting power stored in the battery pack to the outside, a generator feeding mode for outputting power generated by the generator to the outside, and an auto mode for outputting either power stored in the battery pack or power generated by the generator to the outside according to the residual amount of storage in the battery pack.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a portable automatic storage power supply device. [Background technology]

[0002] Power supply devices that supply power to electric work machines and the like are transported to various areas, such as disaster areas, for use. As for the power supply devices, various power supply methods based on power generation using natural energy such as solar power and wind power, as well as engine generators, are being considered.

[0003] For example, Patent Document 1 discloses a portable facility that has a power generation unit including at least one power generation device, such as a wind power generation device, a solar power generation device, and a hydroelectric power generation device, attached to a transportable first housing, and a functional unit that is installed in a transportable second housing and includes electrical equipment that operates by receiving power from the power generation unit, thereby making the facility highly transportable and operable in areas where it is difficult to secure a power source. Here, the power generation unit described in Patent Document 1 is configured to store the power generated by the power generation device in a storage battery provided in the first housing, and to supply the power stored in the storage battery to the functional unit as needed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-169533 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the device described in Patent Document 1, when the amount of power required by the functional unit is less than the amount of power generated by the power generation device, the storage battery is maintained in a charged state, so that the storage battery is maintained in a fully charged state for a long period of time, which may deteriorate the storage battery's storage performance. SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a portable automatic storage type power supply device capable of easily switching the power supply method. [Means for solving the problem]

[0006] The portable automatic power supply device according to the present invention is a portable automatic power supply device comprising a battery pack, a generator, and a control device for controlling the output of power from the battery pack or the generator to the outside, and is characterized in that the device is further equipped with a mode designation means for outputting a predetermined designation signal to the control device, and the control device is set to one of the following power supply modes based on the designation signal output by the mode designation means: a battery power supply mode in which power stored in the battery pack is output to the outside, a generator power supply mode in which power generated by the generator is output to the outside, and an auto mode in which power stored in the battery pack or power generated by the generator is output to the outside depending on the remaining power storage capacity of the battery pack. Effect of the Invention

[0007] According to the present invention, the power supply method can be easily switched. [Brief description of the drawings]

[0008] [Figure 1] 1 is an overall configuration diagram showing a first embodiment. [Diagram 2] FIG. 1 is a configuration diagram of a portable automatic power storage type power supply device according to a first embodiment. [Diagram 3] FIG. 2 is a configuration diagram of a control device according to the first embodiment. [Figure 4] 5 is a flowchart showing the operation of an engine / battery control unit and a remaining amount monitoring unit in the first embodiment. [Diagram 5] 4 is a flowchart showing an operation of an AC / DC converter control unit in the first embodiment. [Figure 6] 4 is a flowchart showing an operation of a DC / AC converter control unit in the first embodiment. [Figure 7]FIG. 11 is a configuration diagram of a portable automatic electricity storage type power supply device according to a second embodiment. [Figure 8] FIG. 11 is a configuration diagram of a control device according to a second embodiment. [Figure 9] 10 is a flowchart showing the operation of a DC / DC converter control unit in the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The following description and drawings are examples for explaining the present invention, and appropriate omissions and simplifications have been made for clarity of explanation. The present invention can be implemented in various other forms. Unless otherwise specified, each component may be singular or plural.

[0010] In order to facilitate understanding of the invention, the position, size, shape, range, etc. of each component shown in the drawings may not represent the actual position, size, shape, range, etc. Therefore, the present invention is not necessarily limited to the position, size, shape, range, etc. disclosed in the drawings.

[0011] [First embodiment] FIG. 1 is a diagram showing the overall configuration of a first embodiment of the present invention. 1 shows a state in which a portable automatic power storage type power supply device 1 and an electric work machine 2 are connected via a power supply cable 3. The electric work machine 2 is provided with a connector 4 for connecting the power supply cable 3. The portable automatic power storage type power supply device 1 brought to the work site is detachably connected to the electric work machine 2 by the connector 4. Note that, in this embodiment, an electric work machine 2 such as an excavator will be described as an example, but the present invention is not limited to this and may be other electric equipment used at the work site. The portable automatic power storage type power supply device 1 has a battery pack, an engine generator, and a control device built in a housing, and outputs electric power from the battery pack or the engine generator.

[0012] The portable automatic power supply device 1 also includes a control monitor 11. The control monitor 11 is a display panel equipped with a touch panel, part of which constitutes a mode designation unit for designating a power supply mode. A user can switch the power supply method of the portable automatic power supply device 1 by arbitrarily operating the mode designation unit to designate a power supply mode according to the site where the device is brought in.

[0013] FIG. 2 is a configuration diagram of the portable automatic electricity storage type power supply device 1 in the first embodiment. In addition to the control monitor 11, the portable automatic power storage type power supply device 1 comprises a control device 12, an engine generator 13, an AC / DC converter 14, a battery pack 15, and a DC / AC converter 16. All of these are accommodated within the housing of the portable automatic power storage type power supply device 1.

[0014] The engine generator 13 is equipped with a fuel tank (not shown), and is driven by fuel supplied from the fuel tank to output AC power. The engine generator 13 and the control device 12 are connected by a signal line D3. Via the signal line D3, the control device 12 issues commands to start / stop the engine generator 13, and also acquires the amount of fuel remaining in the fuel tank.

[0015] The AC / DC converter 14 converts the AC power AC1 generated by the engine generator 13 into DC power DC1. The AC / DC converter 14 and the control device 12 are connected by a signal line D4. Via the signal line D4, the control device 12 issues a command to start / stop the AC / DC converter 14 and also controls the conversion operation.

[0016] The battery pack 15 includes a battery module and a charge / discharge management system, both of which are not shown. When the engine generator 13 is in operation, the battery pack 15 charges the battery module using the DC power DC1 output from the AC / DC converter 14. The charge / discharge management system controls the battery module to stop charging when the battery module is fully charged. When the engine generator 13 is stopped, that is, when the power supply mode is designated as the battery power supply mode, the battery module outputs the power stored in the battery module. In the following description, charging and discharging the battery module will be referred to as charging the battery pack 15 and outputting power from the battery pack 15. The battery pack 15 and the control device 12 are connected by a signal line D5. Through the signal line D5, the control device 12 commands the battery pack 15 to output the DC power DC2 and acquires the remaining battery capacity, such as the SOC (State Of Charge) of the battery pack 15.

[0017] The DC / AC converter 16 converts the DC power DC1 output from the AC / DC converter 14 or the DC power DC2 output from the battery pack 15 into AC power AC2. The DC / AC converter 16 and the control device 12 are connected by a signal line D6. Via the signal line D6, the control device 12 issues a command to start / stop the DC / AC converter 16 and also controls the conversion operation. The AC power AC2 output from the DC / AC converter 16 is supplied to the electric working machine 2 and drives the AC type electric working machine 2.

[0018] That is, the AC / DC converter 14 converts the first AC power generated by the engine generator 13 into the first DC power. The DC / AC converter 16 converts the first DC power output from the AC / DC converter 14 and the second DC power output from the battery pack 15 into the second AC power. Then, the portable automatic power storage type power supply device 1 outputs the second AC power converted by the DC / AC converter 16.

[0019] The control monitor 11 is connected to the control device 12 by a signal line D1, and displays the remaining fuel level and remaining battery level obtained by the control device 12. It also displays warnings about the remaining fuel level and remaining battery level output from the control device 12, and issues warnings from a speaker built into the control monitor 11. Furthermore, the user specifies a power supply mode by arbitrarily specifying a mode specification section formed on the touch panel of the control monitor 11, and this specified power supply mode is input to the control device 12 via the signal line D1. The power supply modes include a battery power supply mode, a generator power supply mode, and an auto mode, and the user specifies one of these power supply modes.

[0020] FIG. 3 is a configuration diagram of the control device 12 in the first embodiment. The control device 12 includes an engine / battery control unit 121, a remaining charge monitoring unit 122, an AC / DC converter control unit 123, and a DC / AC converter control unit .

[0021] The engine / battery control unit 121 controls the operation and start / stop of the engine generator 13 and the battery pack 15. The remaining amount monitoring unit 122 monitors the remaining fuel amount in the engine generator 13 and the remaining battery amount in the battery pack 15. The AC / DC converter control unit 123 controls the operation of the AC / DC converter 14 so that it converts AC power AC1 to a predetermined DC power DC1. The DC / AC converter control unit 124 controls the operation of the DC / AC converter 16 so that it converts DC power DC1, DC2 to a predetermined AC power AC2.

[0022] 4 is a flowchart showing the operation of the engine / battery control unit 121 and the remaining charge monitoring unit 122 in the first embodiment. This flowchart shows the processing corresponding to the engine / battery control unit 121 and the remaining charge monitoring unit 122 when the control device 12 is configured by a computer equipped with a CPU, memory, etc. Note that all or part of the processing may be realized by a hard logic circuit. In the following explanation of the processing operation, the operations of the engine / battery control unit 121 and the remaining charge monitoring unit 122 will be explained as the operation of the control device 12 for convenience.

[0023] The user specifies a power supply mode according to the site where the device is delivered. There are three power supply modes: battery power supply mode, generator power supply mode, and auto mode, and the user specifies one of these power supply modes. In the battery power supply mode, the portable automatic power storage type power supply device 1 outputs power stored in the battery pack 15, and in the generator power supply mode, it outputs power generated by the engine generator 13. Furthermore, in the auto mode, it outputs power stored in the battery pack 15 or power generated by the engine generator 13 depending on the remaining battery power of the battery pack 15.

[0024] When the site where the portable automatic power storage type power supply device 1 is delivered is, for example, underground or indoors, where ventilation is hindered, the user specifies the battery power supply mode as the power supply mode so as not to emit engine exhaust. In this battery power supply mode, the battery pack 15 is consumed to avoid long-term maintenance in a fully charged state, and deterioration of the battery storage performance can be prevented. If the site where the device is delivered is, for example, in an area where ventilation is not hindered and the user wants to continuously and stably secure power while refilling fuel, the user specifies the generator power supply mode. If the site where the device is delivered is, for example, in an area where ventilation is relatively not hindered and the user wants to secure power without considering the selection of the power supply mode, the user specifies the auto mode. Data on the power supply mode specified by the user through the mode specification unit of the control monitor 11 is output from the control monitor 11 as a predetermined specification signal corresponding to the power supply mode, and is input to the control device 12 through the signal line D1. The data input to the control device 12 is held until new data is input, and the control device 12 monitors the held data as input data. Note that, although the following description will be given using an example of the engine generator 13, other generators may also be used.

[0025] In step S401 of the flowchart shown in Fig. 4, the control device 12 judges the input data (designation signal) and executes processing of the power supply mode according to the input data. If the input data is the battery power supply mode, the process proceeds to step S402. If the input data is the generator power supply mode, the process proceeds to step S410. If the input data is the auto mode, the process proceeds to step S420.

[0026] In step S402, the control device 12 determines whether the remaining battery charge in the battery pack 15 is equal to or greater than a specified value. If the remaining battery charge is less than the specified value, the process proceeds to step S403, and if the remaining battery charge is equal to or greater than the specified value, the process proceeds to step S404.

[0027] In step S403, the control device 12 issues a warning about the remaining battery level. Specifically, data indicating the remaining battery level and the warning is sent to the control monitor 11. In response to this, the control monitor 11 displays the remaining battery level and the warning, and issues a warning from a built-in speaker. Then, the process proceeds to step S404.

[0028] In step S404, the control device 12 determines whether the engine generator 13 is ON, that is, whether the engine generator 13 is started and operating. If the engine generator 13 is ON, the process proceeds to step S405, and if the engine generator 13 is not ON, the process proceeds to step S407.

[0029] In step S405, the control device 12 turns off the engine generator 13, i.e., stops the engine generator 13. Then, in the next step S406, the control device 12 turns on the output from the battery pack 15. Thereafter, the portable automatic electricity storage type power supply device 1 outputs power from the battery pack 15.

[0030] In step S407, the control device 12 turns on the output from the battery pack 15 if the output from the battery pack 15 is not already turned on. If the output from the battery pack 15 is already turned on, the process of turning on the output is not performed. Thereafter, the portable automatic electricity storage type power supply device 1 outputs power from the battery pack 15.

[0031] In step S401, if the input data indicates the generator power supply mode, the process proceeds to step S410. In step S410, the control device 12 determines whether or not the remaining amount of fuel in the engine generator 13 is equal to or greater than a specified value. If the remaining amount of fuel is less than the specified value, the process proceeds to step S411, and if the remaining amount of fuel is equal to or greater than the specified value, the process proceeds to step S413.

[0032] In step S411, the control device 12 issues a warning about the remaining fuel amount. Specifically, data indicating the remaining fuel amount and the warning is sent to the control monitor 11. In response to this, the control monitor 11 displays the remaining fuel amount and the warning, and issues a warning from a built-in speaker. Then, the process proceeds to step S412.

[0033] In step S412, the control device 12 sets the battery power supply mode as the power supply mode. Specifically, data indicating the battery power supply mode is input as data monitored in step S401. Then, it is determined that the battery power supply mode is set in step S401, and the device transitions to the battery power supply mode in step S402 and thereafter. Since the site where the generator power supply mode is specified is assumed to be an area where ventilation is not hindered, there is no problem in automatically transitioning to the battery power supply mode. As a result, when the generator power supply mode is specified and the remaining fuel amount is less than a specified value, that is, when the remaining fuel amount falls below a predetermined third threshold, the device automatically transitions to the battery power supply mode, and the output of power from the portable automatic storage type power supply device 1 can be continued.

[0034] The fuel level warning may be issued in multiple stages according to the amount of remaining fuel, and when there is some margin for the remaining fuel, the process proceeds to step S413 described below, and when there is no margin for the remaining fuel, the process proceeds to step S412. In this case, if the fuel level warning is issued when there is margin for the remaining fuel and fuel can be replenished, the power output can be continued in the generator power supply mode. Also, in this example, when the remaining fuel level is less than a specified value, the mode automatically switches to the battery power supply mode, but after the fuel level warning is issued in step S411, the mode may also not automatically switch to the battery power supply mode by switching to step S413.

[0035] In step S413, the control device 12 determines whether the engine generator 13 is OFF, that is, whether the engine generator 13 has not yet been started. If the engine generator 13 is OFF, the process proceeds to step S414, and if the engine generator 13 is already ON, the process returns to step S401.

[0036] In step S414, the control device 12 turns the engine generator 13 on, i.e. starts up the engine generator 13. Then, in the next step S415, the output from the battery pack 15 is turned off. When the output from the battery pack 15 is turned off, the battery pack 15 is charged using power generated by the engine generator 13. Thereafter, the portable automatic power storage type power supply device 1 outputs power from the engine generator 13. Then, the process returns to step S401.

[0037] In step S401, if the input data is the auto mode, the process proceeds to step S420. In step S420, the control device 12 determines whether the remaining battery charge of the battery pack 15 is less than a first specified value, for example, 10%, or not. If it is not less than the specified value, the process proceeds to step S421, and if it is less than the specified value, the process proceeds to step S423.

[0038] Step S421 and the next step S422 are the same as steps S405 and S406. That is, the engine generator 13 is stopped, and the output from the battery pack 15 is turned ON. Thereafter, the portable automatic electricity storage type power supply device 1 outputs power from the battery pack 15. Then, the process returns to step S401.

[0039] Step S423 and the next step S424 are the same as steps S414 and S415. That is, the engine generator 13 is started, the output from the battery pack 15 is turned off, and the battery pack 15 is charged. Thereafter, the portable automatic power storage type power supply device 1 outputs power from the engine generator 13. In this way, when the power supply mode is set to the auto mode, if the remaining charge of the battery pack 15 falls below a predetermined first threshold, the control device 12 starts the engine generator 13 to output the generated power to the outside and charges the battery pack 15 using the power generated by the engine generator 13. Then, the process proceeds to step S425.

[0040] In step S425, the control device 12 determines whether the remaining battery charge of the battery pack 15 is equal to or greater than a second specified value, for example, 95%. If the remaining battery charge is not equal to or greater than the specified value, the process returns to step S423, and the charging of the battery pack 15 and the power from the engine generator 13 are continued. If the remaining battery charge is equal to or greater than the specified value, the process proceeds to step S426.

[0041] Step S426 and the next step S427 are similar to steps S405 and S406. That is, the engine generator 13 is stopped, and the output from the battery pack 15 is turned ON. Then, the process returns to step S401. In this way, when the power supply mode is set to the auto mode, if the remaining amount of stored power in the battery pack 15 exceeds the second threshold value, which is set to a value larger than the first threshold value, the control device 12 stops the engine generator 13 and outputs the power stored in the battery pack 15 to the outside.

[0042] 5 is a flowchart showing the operation of AC / DC converter control unit 123 in the first embodiment. This flowchart shows processing equivalent to that of AC / DC converter control unit 123 when control device 12 is configured by a computer equipped with a CPU, memory, etc. Note that all or part of the processing may be realized by a hard logic circuit. In the following explanation of the processing operations, the operation of AC / DC converter control unit 123 will be explained as the operation of control device 12 for convenience.

[0043] In step S501 of the flowchart shown in Fig. 5, the control device 12 judges whether the current power supply mode is the battery power supply mode. Specifically, similar to step S401 of the flowchart shown in Fig. 4, the control device 12 constantly monitors input data. Then, it judges whether the input data is the battery power supply mode. If it is the battery power supply mode, the process proceeds to step S502, and if it is not the battery power supply mode, the process proceeds to step S503.

[0044] In step S502, if AC / DC converter 14 is not already in a stopped state, control device 12 stops the operation of AC / DC converter 14. Specifically, control device 12 stops the supply of operating power supplied to AC / DC converter 14 and stops the operation signal to AC / DC converter 14. If AC / DC converter 14 is already in a stopped state, the process of stopping is not performed. This reduces the power supply to unnecessary circuits in the battery power supply mode. Then, control device 12 returns to step S501.

[0045] In step S503, if AC / DC converter 14 is not already in operation, control device 12 starts up AC / DC converter 14. Then, the process proceeds to step S504. In step S504, control device 12 determines whether the voltage of DC power DC1 of AC / DC converter 14 is equal to or greater than a designated value. If it is not equal to or greater than the designated value, the process proceeds to step S505, and if it is equal to or greater than the designated value, the process proceeds to step S506.

[0046] In step S505, control device 12 controls AC / DC converter 14 so as to increase the output current of direct current power DC1 from AC / DC converter 14. Then, the process returns to step S501.

[0047] In step S506, control device 12 controls AC / DC converter 14 so as to reduce the output current of direct current power DC1 from AC / DC converter 14. Then, the process returns to step S501. In this manner, AC / DC converter control unit 123 controls AC / DC converter 14 so that DC power DC1 is stabilized.

[0048] 6 is a flowchart showing the operation of the DC / AC converter control unit 124 in the first embodiment. This flowchart shows the processing corresponding to the DC / AC converter control unit 124 when the control device 12 is configured by a computer equipped with a CPU, memory, etc. Note that all or part of the processing may be realized by a hard logic circuit. In the following explanation of the processing operation, the operation of the DC / AC converter control unit 124 will be explained as the operation of the control device 12 for convenience.

[0049] The process of the flowchart shown in Fig. 6 is started when the input data is constantly monitored and any power supply mode is designated, similar to step S401 of the flowchart shown in Fig. 4. Note that a switch may be provided in the portable automatic power storage type power supply device 1, and the process may be started by operating the switch.

[0050] In step S601, the control device 12 starts up the DC / AC converter 16. Next, in step S602, the control device 12 determines whether the voltage of the AC power AC2 of the DC / AC converter 16 is equal to or greater than a designated value. If it is not equal to or greater than the designated value, the process proceeds to step S603, and if it is equal to or greater than the designated value, the process proceeds to step S604.

[0051] In step S603, the control device 12 controls the DC / AC converter 16 so as to increase the output current of the AC power AC2 of the DC / AC converter 16. Then, the process returns to step S602.

[0052] In step S604, the control device 12 controls the DC / AC converter 16 so as to reduce the output current of the AC power AC2 of the DC / AC converter 16. Then, the process returns to step S602. In this manner, the DC / AC converter control unit 124 controls the AC power AC2 of the DC / AC converter 16 so as to be stabilized.

[0053] According to the embodiment described above, the battery power supply mode, generator power supply mode, and auto mode can be appropriately switched according to the site where the device is brought in, and power can be supplied to electrical devices driven by AC power, by arbitrarily specifying the mode by the user. Therefore, the portable automatic storage type power supply device 1 can be operated in the optimal power supply mode according to environmental factors such as ventilation at the site where the device is brought in. For example, in the generator power supply mode, the device can output power generated by the engine generator and charge the battery pack consumed in the battery power supply mode. In the auto mode, the remaining battery level of the battery pack is monitored, and when the remaining battery level falls below a specified value, the device switches to power from the engine generator and outputs power, so that the device can output power stably while suppressing fuel consumption.

[0054] [Second embodiment] The overall configuration diagram of the second embodiment is similar to the overall configuration diagram of the first embodiment shown in FIG. 1, and therefore is not shown.

[0055] FIG. 7 is a configuration diagram of the portable automatic electricity storage type power supply device 1 in the second embodiment. In the first embodiment, the portable automatic power storage type power supply device 1 outputs AC power, and the electric work machine 2 is driven by the AC power. On the other hand, in the second embodiment, the portable automatic power storage type power supply device 1 outputs DC power, and the electric work machine 2 is driven by the DC power.

[0056] The second embodiment differs from the portable automatic power storage type power supply device 1 in the first embodiment shown in Fig. 2 in that a DC / DC converter 17 is provided instead of the DC / AC converter 16 in Fig. 2. The other configurations are the same as in Fig. 2, and the same parts are denoted by the same reference numerals and will be described briefly.

[0057] The DC / DC converter 17 converts the DC power DC1 output from the AC / DC converter 14 or the DC power DC2 output from the battery pack 15 into DC power DC3. The DC / DC converter 17 and the control device 12 are connected by a signal line D6. Via the signal line D6, the control device 12 issues a command to start / stop the DC / DC converter 17 and also controls the conversion operation. The DC power DC3 output from the DC / DC converter 17 is supplied to the electric working machine 2 and drives the DC type electric working machine 2.

[0058] That is, the AC / DC converter 14 converts the first AC power generated by the engine generator 13 into the first DC power. The DC / DC converter 17 converts the first DC power output from the AC / DC converter 14 and the second DC power output from the battery pack 15 into the third DC power. Then, the portable automatic power storage type power supply device 1 outputs the third DC power converted by the DC / DC converter 17.

[0059] FIG. 8 is a configuration diagram of the control device 12 in the second embodiment. The difference between the configuration diagram of control device 12 in the first embodiment shown in Fig. 3 is that in the second embodiment, a DC / DC converter control unit 125 is provided instead of DC / AC converter control unit 124 in Fig. 3. The other configuration is the same as in Fig. 3, and the same parts are given the same reference numerals and their description will be simplified.

[0060] The DC / DC converter control section 125 controls the operation of the DC / DC converter 17 so that the DC / DC converter 17 converts the DC powers DC1 and DC2 into a predetermined DC power DC3.

[0061] 9 is a flowchart showing the operation of the DC / DC converter control unit 125 in the second embodiment. This flowchart shows the processing corresponding to the DC / DC converter control unit 125 when the control device 12 is configured by a computer equipped with a CPU, memory, etc. Note that all or part of the processing may be realized by a hard logic circuit. In the following explanation of the processing operation, the operation of the DC / DC converter control unit 125 will be explained as the operation of the control device 12 for convenience.

[0062] The process of the flowchart shown in Fig. 9 is started when the input data is constantly monitored and any power supply mode is designated, similar to step S401 of the flowchart shown in Fig. 4. Note that a switch may be provided in the portable automatic power storage type power supply device 1, and the process may be started by operating the switch.

[0063] In step S901, the control device 12 starts up the DC / DC converter 17. Next, in step S902, the control device 12 determines whether the voltage of the DC power DC3 of the DC / DC converter 17 is equal to or greater than a designated value. If it is not equal to or greater than the designated value, the process proceeds to step S903, and if it is equal to or greater than the designated value, the process proceeds to step S904.

[0064] In step S903, control device 12 controls DC / DC converter 17 so as to increase the output current of direct current power DC3 of DC / DC converter 17. Then, the process returns to step S902.

[0065] In step S904, control device 12 controls DC / DC converter 17 so as to reduce the output current of direct current power DC3 of DC / DC converter 17. Then, the process returns to step S902.

[0066] According to the embodiment described above, the battery power supply mode, generator power supply mode, and auto mode can be appropriately switched according to the site where the device is brought in, and power can be supplied to electrical equipment driven by DC power, by arbitrarily specifying the mode by the user. Therefore, the portable automatic storage type power supply device 1 can be operated in the optimal power supply mode according to environmental factors such as ventilation at the site where the device is brought in. For example, in the generator power supply mode, the device can output power generated by the engine generator and charge the battery pack consumed in the battery power supply mode. In the auto mode, the remaining battery level of the battery pack is monitored, and when the remaining battery level falls below a specified value, the device switches to power from the engine generator and outputs power, so that the device can output power stably while suppressing fuel consumption.

[0067] According to the embodiment described above, the following advantageous effects can be obtained. (1) The portable automatic power storage type power supply device 1 includes a battery pack 15, a generator (engine generator 13), and a control device 12 that controls the power output from the battery pack 15 or the generator to the outside. The portable automatic power storage type power supply device 1 includes a mode designation means (control monitor 11) that outputs a predetermined designation signal to the control device 12, and the control device 12 is characterized in that, based on the designation signal output by the mode designation means, the control device 12 is set to one of the following power supply modes: a battery power supply mode in which the power stored in the battery pack 15 is output to the outside, a generator power supply mode in which the power generated by the generator is output to the outside, and an auto mode in which the power stored in the battery pack 15 or the power generated by the generator is output to the outside according to the remaining amount of power stored in the battery pack 15. This makes it possible to easily switch the power supply method.

[0068] (Modification) The present invention can be carried out by modifying the above-described first and second embodiments as follows. (1) In the first embodiment, the portable automatic power storage power supply device 1 outputs AC power, and in the second embodiment, an example has been described in which the portable automatic power storage power supply device 1 outputs DC power. As a modified example, the portable automatic power storage power supply device 1 may be configured to output AC power and DC power. For example, the portable automatic power storage power supply device 1 includes a DC / AC converter 16 that converts the DC power DC1 output from the AC / DC converter 14 or the DC power DC2 output from the battery pack 15 into AC power AC2, and a DC / DC converter 17 that converts the DC power DC1 or the DC power DC2 into DC power DC3. The portable automatic power storage power supply device 1 includes a converter control unit that controls the DC / AC converter 16 and the DC / DC converter 17. Depending on whether AC power or DC power is to be output, either the DC / AC converter 16 or the DC / DC converter 17 is operated. This makes it possible for a single portable automatic storage type power supply device 1 to be able to handle electrical equipment used on-site whether it is powered by AC power or DC power.

[0069] The present invention is not limited to the above-described embodiments, and other forms that are conceivable within the scope of the technical idea of ​​the present invention are also included in the scope of the present invention as long as they do not impair the characteristics of the present invention. [Explanation of symbols]

[0070] 1···Portable automatic power storage type power supply device, 2···Electric work machine, 3···Power supply cable, 4···Connector, 11···Control monitor (mode designation means), 12···Control device, 13···Engine generator (generator), 14···AC / DC converter, 15···Battery pack, 16···DC / AC converter, 17···DC / DC converter, 121···Engine / battery control unit, 122···Remaining power monitoring unit, 123···AC / DC converter control unit, 124···DC / AC converter control unit, 125···DC / DC converter control unit, D1, D3, D4, D5, D6···Signal line, AC1, AC2···AC power, DC1, DC2, DC3···DC power.

Claims

1. A portable automatic power storage type power supply device including a battery pack, a generator, and a control device that controls power output from the battery pack or the generator to an outside, a mode designation means for outputting a predetermined designation signal to the control device, The control device is configured to be set to one of the following power supply modes based on the designation signal output by the mode designation means: a battery power supply mode in which the power stored in the battery pack is output to the outside, a generator power supply mode in which the power generated by the generator is output to the outside, and an auto mode in which the power stored in the battery pack or the power generated by the generator is output to the outside depending on the remaining amount of power stored in the battery pack.

2. The portable automatic storage type power supply device according to claim 1, When the power supply mode is set to the auto mode, the control device starts the generator to output the generated power to the outside when the remaining power storage capacity of the battery pack falls below a predetermined first threshold, and charges the battery pack using the power generated by the generator.

3. The portable automatic storage type power supply device according to claim 2, The control device is characterized in that, when the power supply mode is set to the auto mode, if the remaining power storage capacity of the battery pack exceeds a second threshold set to a value greater than the first threshold, the control device stops the generator and outputs the power stored in the battery pack to the outside.

4. The portable automatic storage type power supply device according to claim 1, The portable automatic storage type power supply device is characterized in that, when the power supply mode is set to the generator power supply mode, the control device outputs the power generated by the generator to the outside and charges the battery pack using the power generated by the generator.

5. The portable automatic storage type power supply device according to claim 4, the generator is an engine generator that is driven by a supply of fuel, The portable automatic storage type power supply device is characterized in that when the power supply mode is set to the generator power supply mode, if the remaining fuel amount of the engine generator falls below a predetermined third threshold, the control device sets the power supply mode to the battery power supply mode.

6. In the portable automatic storage type power supply device according to any one of claims 1 to 5, A portable automatic storage type power supply device comprising: an AC / DC converter that converts a first AC power generated by the generator into a first DC power; and a DC / AC converter that converts the first DC power output from the AC / DC converter and a second DC power output by the battery pack into a second AC power, and outputs the second AC power converted by the DC / AC converter.

7. In the portable automatic storage type power supply device according to any one of claims 1 to 5, A portable automatic storage type power supply device comprising: an AC / DC converter that converts a first AC power generated by the generator into a first DC power; and a DC / DC converter that converts the first DC power output from the AC / DC converter and the second DC power output by the battery pack into a third DC power, and outputs the third DC power converted by the DC / DC converter.

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