JP5857200B2 - Independent power supply for containers - Google Patents

Description

  The present invention relates to an independent power supply device using a container, which is provided with a solar cell provided on the outer shell of a container and a power storage device charged from the solar cell.

  Conventionally, this type of container-based independent power supply device has a solar cell attached to the top or wall of the container outdoors, where it is difficult to supply commercial power. Thus, it is known that power can be supplied even at night (see, for example, Patent Document 1).

  Hereinafter, a system system related to the independent power supply using the container will be described with reference to FIG. As shown in FIG. 9, the solar cell 101 is installed on the ceiling or wall surface of a container (not shown), connected to the power storage device 103 via the backflow prevention diode 102, and stores the power generated by the solar cell 101. To do. Further, the power storage device 103 supplies power to the ventilation fan 105 via the switch 104 controlled by the controller 106. The controller 106 monitors the output voltage of the solar cell 101. When the output voltage is equal to or higher than the reference value, the switch 104 is closed to operate the ventilation fan 105. When the output voltage is lower than the reference value, the switch 104 is opened. Then, the ventilation fan 105 is stopped.

  The power storage device 103 supplies power to the lighting device 108 via the switch 107 controlled by the controller 110. The controller 110 is connected to a door sensor 109 that detects opening / closing of the door of the container. When the door sensor 109 detects opening of the door, the controller 110 closes the switch 107 and turns on the lighting device 108.

  In addition, this type of independent power supply using containers is equipped with multiple containers such as clinics, patient camps, and toilets for each container in an undeveloped area where infrastructure has not been developed. A type clinic system is known (see, for example, Patent Document 2).

  Furthermore, as a power storage device used in this type of container-based independent power supply device, a non-woven fabric containing sulfuric acid is retained so that the electrolyte solution does not leak out, and a safety valve for venting is provided. A control valve type lead acid battery is known (see, for example, Patent Document 3).

  Hereinafter, this control valve type lead-acid battery will be described with reference to FIG. As shown in FIG. 10, the main body 201 of the control valve type lead storage battery includes a box-shaped electrical part 202 whose outer part is open and a lid part 203 that covers the open part. A plurality of positive plates 204, separators 205, and negative plates 206 are arranged and housed in the electrical component 202, and the plurality of positive plates 204 and negative plates 206 are connected by different straps 207, respectively. The lid portion 203 is provided with a positive electrode terminal portion 208, a negative electrode terminal portion 209, and a safety valve 210. The positive electrode terminal portion 208 is electrically connected to a strap 207 that connects the positive electrode plate 204. Similarly, the negative electrode terminal portion 209 is also It is electrically connected to the negative electrode plate 206. The main body 201 can be charged and discharged with a direct current through the positive terminal portion 208 and the negative terminal portion 209.

  The safety valve 210 keeps the safety of the main body 201 by releasing the internal gas when the main body 201 is overcharged or becomes a high temperature of a predetermined temperature or higher and the internal pressure is increased.

JP 2005-192378 A JP 2003-328574 A JP 2005-38810 A

  In such a conventional example, the controller shown in Patent Document 1 is configured to supply or stop power to the ventilating fan or the lighting device in accordance with the output voltage of the solar cell or the detection signal of the door sensor. Charging / discharging is repeated regardless of the state. In addition, when the power storage device is left at a high temperature for a long period of time, the voltage drops due to spontaneous discharge. If the user is not aware of this, a desired discharge capacity cannot be obtained, resulting in inconvenience. Sometimes. As described above, the power storage device may be undercharged or overcharged, and particularly when the power storage device is managed in a standby state, there is a problem that it is difficult to keep the power storage device in a normal state so as not to deteriorate.

  In addition, as shown in Patent Document 2, an independent power source for supplying power to other containers has an external load inadvertently when the power storage device is insufficiently charged or exposed to a high temperature environment. In such a case, there is a problem that the power storage device is damaged or deteriorated.

  Moreover, as shown in Patent Document 3, the control valve type lead-acid battery is equipped with a safety valve so that it can cope with overcharge and a constant high temperature. However, when the safety valve is activated, the electrolyte impregnated in the battery is Since it is released as gas, there is a problem that the storage battery is deteriorated and the life is shortened.

  Therefore, the present invention solves the above-described conventional problems, and prevents the power storage device in the container charged by the solar battery provided in the container from being insufficiently charged or overcharged, and inadvertently in the power storage device. An object is to provide a container-based independent power supply device that can protect the power storage device before the safety valve is activated so that no load is applied, and can maintain the performance and quality of the power storage device safely and with a long life. To do.

And in order to achieve this object, the present invention is a container-based independent power supply device, comprising a solar cell on the outer top surface or side surface of the container, and storing and storing electricity obtained from the solar cell. an electricity storage device for supplying electricity to the external load is provided within said container, and a control unit for controlling the charging and discharging of the electric storage device monitors the voltage of the electric storage device, the operation mode of the container use independent power supply Has a selection switch capable of selecting the normal mode or the standby mode.

  When the standby mode is selected by the selection switch, the control unit stops discharging to the external load, and when the voltage of the power storage device becomes smaller than a predetermined lower limit voltage V1, the control unit A container-based independent power supply device, wherein charging to the power storage device is started, and charging from the solar cell to the power storage device is stopped when the voltage of the power storage device becomes equal to or higher than a predetermined upper limit voltage V2. It is what.

The present invention provides in an independent power supply container use, provided with a solar cell in the outer top or side of the container, along with storing electricity obtained from the solar cell, the accumulated electricity external load A power storage device is provided in the container, and a control unit that controls charging and discharging of the power storage device by monitoring a voltage of the power storage device, and an operation mode of the independent power supply using the container is selected as a normal mode or a standby mode It has a selection switch that can.

  When the selection switch is maintained in the standby mode, the control unit starts charging from the solar cell to the power storage device when a predetermined time has elapsed after stopping charging, and the voltage of the power storage device is When the voltage reaches a predetermined upper limit voltage V2 or more, charging from the solar cell to the power storage device is stopped, and the container-based independent power supply device is provided.

  These achieve the initial purpose.

As described above, according to the present invention, in an independent power supply using a container, a solar cell is provided on an outer top surface or a side surface of the container, and the electricity obtained from the solar cell is stored, and the stored electricity is used for lighting equipment, A power storage device that supplies power to the external load is provided in the container, a control unit that monitors the voltage of the power storage device to control charging and discharging of the power storage device, and an operation mode of the independent power supply using the container is normally set It has a selection switch that can be selected between a mode and a standby mode.

  When the standby mode is selected by the selection switch, the control unit stops discharging to the external load, and when the voltage of the power storage device becomes smaller than a predetermined lower limit voltage V1, the control unit Charge the power storage device.

  Moreover, when the voltage of the power storage device becomes equal to or higher than a predetermined upper limit voltage V2, the charging from the solar cell to the power storage device is stopped, so that the discharge circuit to the external load is shut off. The control unit that monitors the output voltage of the power storage device can maintain the output voltage within a range that is equal to or higher than the predetermined lower limit voltage V1 and does not exceed the predetermined upper limit voltage V2.

  Therefore, it is possible to obtain an effect that it is possible to extend the life by preventing insufficient charging and overcharging of the power storage device, maintain the output voltage of the power storage device within an appropriate range, and continue to be able to supply power to the external load at any time. Can do.

Further, the present invention provides a container-based independent power supply device that includes a solar cell on an outer top surface or a side surface of a container, stores electricity obtained from the solar cell, and stores the stored electricity in an external load such as a lighting device. A storage unit that supplies power to the container, and monitors a voltage of the storage device to control charging and discharging of the storage device; and an operation mode of the independent power supply using the container is set to a normal mode or a standby mode It has a selection switch that can be selected for the mode.

  When the selection switch is maintained in the standby mode, the control unit starts charging from the solar cell to the power storage device when a predetermined time has elapsed after stopping charging.

  In addition, when the voltage of the power storage device becomes equal to or higher than a predetermined upper limit voltage V2, the control unit is configured to stop charging from the solar battery to the power storage device, so that the control unit elapses a predetermined time after stopping the charging. At this stage, the battery can be charged from the solar cell to the power storage device to prevent shortage of charge, to prevent overcharging and to prolong the service life. It is possible to obtain the effect that the user can use it conveniently.

1 is a block circuit diagram of an independent power supply using containers according to Embodiment 1 of the present invention. Same schematic diagram Same characteristic diagram regarding output voltage and life of power storage device Same flowchart Other flowchart Configuration diagram of power storage device of independent power supply using container according to embodiment 2 of the present invention Same as above, block circuit diagram Configuration diagram of power storage device of independent power supply using container according to embodiment 3 of the present invention Block circuit diagram of conventional independent power supply using containers Same perspective view of a partially broken sealed battery

The container-based independent power supply device according to claim 1 of the present invention is a container-based independent power supply device, comprising a solar cell on the outer top surface or the side surface of the container, and storing electricity obtained from the solar cell, A power storage device that supplies stored electricity to an external load such as a lighting device is provided in the container, and a controller that monitors the voltage of the power storage device to control charging and discharging of the power storage device ; There is a selection switch that can select the operation mode of the independent power supply device as the normal mode or the standby mode.

  When the standby mode is selected by the selection switch, the control unit stops discharging to the external load, and when the voltage of the power storage device becomes smaller than a predetermined lower limit voltage V1, the control unit The power storage device is charged, and charging from the solar cell to the power storage device is stopped when the voltage of the power storage device becomes equal to or higher than a predetermined upper limit voltage V2. As a result, the control unit monitors the output voltage of the power storage device in a state where the discharge circuit to the external load is cut off, and sets the output voltage within a range not less than the predetermined lower limit voltage V1 and not exceeding the predetermined upper limit voltage V2. Control is performed so that the battery is not overcharged or overcharged, thereby extending its life, maintaining the output voltage of the power storage device within an appropriate range, and maintaining a voltage that can always be fed even in a standby state. There is an effect that can be.

Further, in an independent power supply using a container, a solar cell is provided on the outer top surface or side surface of the container, and the electricity obtained from the solar cell is stored and the stored electricity is supplied to an external load such as a lighting device. A power storage device is provided in the container, and a control unit that controls charging and discharging of the power storage device by monitoring a voltage of the power storage device, and an operation mode of the independent power supply using the container is selected as a normal mode or a standby mode It has a selection switch that can.

  When the selection switch is maintained in the standby mode, the control unit starts charging from the solar battery to the power storage device when a predetermined time has elapsed after stopping charging, and When the voltage becomes equal to or higher than a predetermined upper limit voltage V2, the charging from the solar cell to the power storage device is stopped. As a result, the control unit starts charging from the solar cell to the power storage device when a predetermined time has elapsed before the voltage of the power storage device is significantly reduced. To prevent the inconvenience of the user due to insufficient charging of the battery, and also to prevent the overcharging, prolong the service life, maintain the output voltage of the power storage device within the proper range, and maintain the voltage that can always supply power even in the standby state. There is an effect that can be.

  Further, the control unit has a configuration in which the power storage device is charged from the solar cell for a set time periodically every day until the voltage of the power storage device reaches a predetermined upper limit voltage V2. Thus, by periodically charging from the solar battery, the voltage of the power storage device can be increased so as not to decrease, and the battery can be stably and reliably charged up to a predetermined upper limit voltage V2 at which charging is completed. There is an effect.

  In addition, the solar cell has a power conditioner connected via a connection switch, and the selection switch is provided with a connection mode. When the connection mode is selected, the control unit sends the connection to the power storage device. Is stopped, and the interconnection switch is closed to convert the direct current from the solar cell into an alternating current, thereby enabling power supply via the grid interconnection. As a result, power can be supplied to AC 100V specification or 200V specification electrical equipment, so that AC power can be supplied instead of commercial power even in the event of a shortage of power from the commercial power or an emergency when the commercial power fails. There is an effect that power can be supplied by grid connection in areas where supply is unstable or in shortage.

  The power storage device is an assembly of a plurality of series blocks in which at least two sealed batteries are connected in series, and a sealed battery in which the series blocks are connected in parallel. In addition, a bimetallic heat-sensitive interrupting section for interrupting current is attached, and the heat-sensitive interrupting section is connected in series to the wiring of the series block. As a result, the power storage device has a thermal shut-off section attached to the outer surface of the series-connected sealed batteries, so that the thermal shut-off section will operate even if the ambient temperature of any sealed battery in the container rises As a result, the series circuit is interrupted, and charging / discharging of the sealed battery in a high temperature state is stopped. This not only prevents deterioration of the sealed battery in a high temperature state, but also reduces adverse effects (overload) on other sealed batteries connected in series, impairing the charge / discharge function as a power storage device There is an effect that it can not be.

  In addition, the sealed battery includes a safety valve that discharges generated gas accumulated inside when the ambient temperature becomes high, and a set temperature at which the thermal shut-off unit attached to the sealed battery operates is equal to or lower than an operating temperature of the safety valve. It has the composition of. As a result, when the temperature of the sealed battery reaches 60 ° C or higher, the safety valve works to release the generated gas and maintain the internal pressure normally, but the internal battery liquid decreases due to the gas release. As a result, the performance and life of the sealed battery are reduced. However, before the safety valve is activated, the thermal shut-off section is activated and the series circuit is interrupted.If the sealed battery is being charged, the charging operation is immediately stopped, preventing further temperature rise, and the safety valve Gas can be prevented from being released from the battery, and the service life of the sealed battery can be extended.

  The power storage device includes a series block in which at least two sealed batteries are arranged in series in the vertical direction and connected in series, and a parallel block in which the plurality of series blocks are arranged in the horizontal direction and the series blocks are connected in parallel. It may be done. As a result, the connection of the sealed batteries arranged in the vertical direction is only connected in series, the connection arranged in the horizontal direction of the series block is only connected in parallel, and the connection work of each sealed battery can be facilitated. Even when the power storage device is assembled on site, it is possible to prevent erroneous connection and to ensure high quality without performance deterioration, and to store in a limited installation place in a limited container.

  Further, the power storage device has a configuration in which when there are a plurality of the parallel blocks, the parallel blocks are arranged in the vertical direction and connected in parallel. As a result, when the installation location in the container is small or the number of sealed batteries is large, by arranging multiple parallel blocks and stacking them vertically, the connection between the parallel blocks is only parallel connection, It is possible to prevent misconnections and ensure quality, and to achieve further space saving.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIGS. 1 and 2, a solar cell panel (hereinafter referred to as a solar cell 2) is inclined and installed on the outer top surface of the container 1 so as to face the sun. A power storage device 3 that stores electricity obtained by the solar cell 2 is housed in the container 1, and an external load 4 that is driven by the electricity stored in the power storage device 3 is connected via an external load switch 7. Yes. The external load 4 includes an illuminator 4 a and a ventilation fan 4 b installed in the container 1, and a streetlight 4 c constructed outside the container 1. Between the solar cell 2 and the power storage device 3, a charging switch 8 that opens and closes the charging circuit and a charging device 9 that charges the power storage device 3 by adjusting the output voltage of the solar cell 2 to a constant voltage are inserted. .

  The power storage device 3 is composed of a plurality of sealed lead-acid batteries. When the power storage device 3 is left for a long period of time, the voltage drops due to natural discharge. The degree of voltage decrease depends on temperature. For example, when left at 45 ° C. for one month, the capacity is about 70% of that at full charge. Further, as shown in FIG. 3, when the output voltage of the power storage device 3 is left with an insufficient charge, deterioration proceeds due to sulfation (white lead sulfate phenomenon) of the power storage device 3 or self-discharge from the negative electrode plate.

  Conversely, if the state in which the output voltage of the power storage device 3 becomes excessive is sustained, the deterioration of the sealed lead-acid battery due to electrode corrosion and internal gas discharge proceeds, and both of them significantly reduce the life of the power storage device 3. . Therefore, it is important to charge and discharge while adjusting the output voltage within an appropriate range.

  In general, trickle charging is used as a charging method to supplement the self-discharge of the storage battery. Trickle charging uses, for example, a stable constant voltage power supply (set voltage is 48 + αV) supplied from a commercial power supply or the like by connecting a plurality of storage batteries (nominal voltage 12 V) as power storage devices in series to form a series circuit. In this method, the series circuit is charged at a constant voltage, and when a constant voltage power source is continuously connected to the series circuit, at the end of charging, charging to compensate for the amount of electricity corresponding to the amount of self-discharge electricity continues.

  However, since the power storage device 3 is often used together with the container 1 in an area where power supply is difficult, it is difficult to secure a stable constant voltage power supply from the outside, and the solar cell 2 attached to the container 1 is difficult. Therefore, charging corresponding to the self-discharge of the power storage device 3 is performed. When the output voltage of the power storage device 3 exceeds the allowable range, the power storage device 3 is discharged to the external load 4.

  That is, as shown in FIG. 1, a voltage sensor 10 that detects the output voltage of the power storage device 3 is provided, and the output voltage value detected by the voltage sensor 10 is sent to the control unit 5 and the charging device 9. The output voltage value from the sensor 10 is compared with a predetermined lower limit voltage V1 and an upper limit voltage V2.

  Based on the comparison result, the charging switch 8 or the external load switch 7 is controlled to be opened and closed so that charging from the solar cell 2 or discharging to the external load 4 is performed so that the output voltage of the power storage device 3 falls within a predetermined voltage range. ing.

  Moreover, the power conditioner 12 is accommodated in the container 1, the power conditioner 12 is connected with the solar cell 2, and electricity supply is controlled by the interconnection switch 11 inserted in the middle. The power conditioner 12 converts the direct current obtained by the solar battery 2 into, for example, an alternating current of 100 V, and can supply power to an AC-driven electric device so that it can be interconnected with other alternating current power supplies. It has become.

  Further, a selection switch 6 is connected to the control unit 5 as an input device, and one of the three operation modes of the normal mode, the standby mode, and the interconnection mode can be selected by operating the selection switch 6. . Before the selection switch 6 is operated, the external load switch 7, the charging switch 8, and the interconnection switch 11 are OFF.

  The operation of the above configuration will be described with reference to the flowchart of FIG.

  First, in normal operation, when the normal mode is selected by the selection switch 6 (S100), the charging switch 8 is closed by the control unit 5 (S101), and the operation of the charging device 9 causes the solar cell 2 to the power storage device 3 to be operated. Charging starts (S102), the voltage sensor 10 measures the output voltage of the power storage device 3, and the control unit 5 compares the measured voltage value with a predetermined lower limit voltage V1 (S103). At this time, if the measured voltage value is smaller than the predetermined lower limit voltage V1, the external load switch 7 is opened to cut off the energization to the external load 4 (S104). However, a device such as a personal computer (not shown) with high importance is not included in the external load 4 and is set to continue energization. If the measured voltage value is equal to or higher than the predetermined lower limit voltage V1, the external load switch 7 is closed and the external load 4 is energized (S105).

  Although not described in the flowchart of FIG. 4, the output voltage of power storage device 3 is set to at least a predetermined lower limit voltage by repeating S103 and subsequent steps that compare the output voltage of power storage device 3 with a predetermined lower limit voltage V1 at an appropriate period. It is set so as not to lower than V1.

  Next, when the container 1 is in a standby state before operation or is not used for a long period of time, it is necessary to prevent insufficient charging due to natural discharge of the power storage device 3. In this case, the standby mode is selected by the selection switch 6. (S100). The external load switch 7, the charge switch 8 and the interconnection switch 11 are all opened by the control unit 5 (S201), the voltage sensor 10 measures the output voltage of the power storage device 3, and the control unit 5 measures the measured voltage value and a predetermined lower limit. The voltage V1 is compared (S202). At this time, if the measured voltage value is equal to or higher than the predetermined lower limit voltage V1, charging is terminated as unnecessary (S206). If the measured voltage value is smaller than the predetermined lower limit voltage V1, only a predetermined time every day is controlled by timer control. By periodically closing the charge switch 8 (S203), the battery charger 9 charges the power storage device 3 from the solar cell 2 (S204). Subsequently, the control unit 5 compares the output voltage value of the power storage device 3 measured by the voltage sensor 10 with the predetermined upper limit voltage V2 (S205), and if the measured voltage value is smaller than the predetermined upper limit voltage V2, Returning to S204, charging from the solar cell 2 to the power storage device 3 is continued (S204). Moreover, when the measured voltage value is more than the predetermined upper limit voltage V2, the charging from the solar cell 2 is stopped and the process is terminated (S206).

  Further, as shown in FIG. 5, instead of the determination step (S202) in which the control unit 5 compares the measured voltage value with the predetermined lower limit voltage V1, the elapsed time since the previous charge and the self-storage device 3 If the determination step (S207) for comparing with a certain period determined based on the amount of discharged electricity is used, it is possible to reliably charge the battery 3 before discharging, and the battery 3 can be used at any time. Can be kept in a state.

  Here, the predetermined period can be determined based on the amount of self-discharge electricity. However, in order to keep it in a usable state at any time, for example, it is desirable to set the period so as to be fully charged in one day. As an example, in a system where the power generation amount of the solar cell 2 is 1 kWh and the total power storage amount of the power storage device 3 is 14.4 kWh, assuming that the average daily sunshine duration is 3 hours, The period during which the amount of self-discharge electricity is approximately 3 kWh is about one month, and therefore the predetermined period may be set to one month.

  Further, as shown in FIG. 4, when the interconnection mode is selected by the selection switch 6 (S100), the interconnection switch 11 is closed and the solar cell 2 is conducted to the power conditioner 12 (S301), and the power conditioner 12 is turned into a direct current. Can be converted into an alternating current of 100 V and connected to an existing alternating current 100 V wiring to supply power. As a result, AC power can be supplied in place of the commercial power supply or in combination with the commercial power supply even in an emergency where the commercial power supply is insufficient or when the commercial power supply fails.

(Embodiment 2)
As shown in FIGS. 6 and 7, in the power storage device 3, two sealed batteries 13 arranged on the left and right are connected in series to form a series block 14, and the plurality of series blocks 14 are close to each other in the horizontal and vertical directions. As shown, it is arranged neatly using a grid-like framework.

  Here, the plurality of sealed batteries 13 constituting the series circuit have different deterioration rates due to the arrangement environment (temperature environment) and the like. If a constant voltage power supply is continuously connected to this series circuit in a state where one of the sealed batteries 13 has deteriorated (for example, the voltage has dropped due to an internal short circuit), excessive voltage will continue to be applied to the remaining sealed batteries 13. become. Then, for example, arc discharge or the like occurs inside the sealed battery 13 and the sealed battery 13 is overheated. Such a phenomenon is particularly remarkable when a plurality of series circuits are charged with the same constant voltage power source.

  In addition, when stacking series circuits in a multistage manner with an emphasis on space efficiency, if the series circuits are arranged with the lid of the sealed battery 13 as the top surface, the long sides of all the sealed batteries 13 are arranged adjacent to each other. Thus, except for the sealed battery 13 at both ends, only the short side surface is exposed to the outside.

  Alternatively, the sealed batteries 13 are arranged so that the short side surfaces are adjacent to each other, and the long side surfaces of the groups are arranged so that only the long side surfaces of some of the sealed batteries 13 are exposed to the outside. It must be the second form.

  In the case of the 1st form, since the surface exposed to the exterior (surface suitable for heat dissipation) is too small, heat dissipation is difficult. In the case of the second embodiment, since the surface exposed to the outside (surface suitable for heat dissipation) is biased only to some of the sealed batteries 13, the temperature difference becomes remarkable inside the series circuit. In either case, the life characteristics of the series circuit are degraded.

  However, the sealed battery 13 is provided with a safety valve 13a, and when the ambient temperature of the sealed battery 13 becomes a high temperature of 60 ° C. or higher and the internal pressure increases, the safety valve 13a releases the internal gas to be sealed. The battery 13 is kept safe.

  Further, a bimetallic heat sensitive shut-off portion 15 that cuts off current at high temperature is closely fixed to the outer surface of all sealed batteries 13, and the operating temperature of the heat shut-off portion 15 is lower than the operating temperature of the safety valve 13a. The temperature is set. The thermal shut-off unit 15 is connected in series to the series circuit of the series block 14. Each series block 14 is connected in parallel.

  In the above configuration, when the surface temperature of the sealed battery 13 increases due to the temperature rise in the container 1 or charging of the power storage device 3, the power storage device 3 is attached to the outer surface of the sealed battery 13. Is operated and the series circuit of the series block 14 is cut off, so that charging / discharging of the sealed battery 13 in the high temperature state is immediately stopped, and excessive charging / discharging in the high temperature state can be prevented. .

  Furthermore, before the safety valve 13a is activated, the thermal shut-off unit 15 is activated to shut off and stop the series circuit of the series block 14, so that the impregnating liquid in the sealed battery 13 caused by gas release from the safety valve 13a is stopped. Reduction can be prevented, and the life can be extended.

(Embodiment 3)
As shown in FIG. 8, the power storage device 3 forms a vertical series block 16 in which the positive and negative poles of the two sealed batteries 13 are arranged in the same vertical direction and stacked vertically and connected in series to form a plurality of vertical series. The blocks 16 are arranged in the horizontal direction to form parallel blocks 17 connected in parallel, and these blocks are fixed by a lattice-like framework.

  Furthermore, when the number of the vertically long serial blocks 16 is large and the parallel blocks 17 do not fit in one stage, other parallel blocks 18 other than the parallel blocks 17 are formed and placed on the parallel blocks 17. At this time, the plus pole 17a of the parallel block 17 and the plus pole 18a of the parallel block 18 are arranged close to each other by turning the vertically long series block 16 of the parallel block 18 upside down.

  In the above configuration, when the sealed batteries 13 are arranged side by side, the vertical series block 16 and the parallel block 17 have the same arrangement direction, so that workability is good. Also, in the connection work of the vertically long serial block 16, only the serial connection is included including the connection of the thermal shut-off unit 15, and the parallel blocks 17 and 18 are only connected in parallel, and the connection work can be facilitated.

  In addition, when maintaining or replacing the sealed battery 13, it is possible to prevent misalignment and incorrect connection and to ensure quality. And if the parallel blocks 17 and 18 which accommodate the vertically long serial block 16 are stacked, the vertical space in the container can be used effectively.

  Furthermore, in the present embodiment, since the plus pole 17a of the parallel block 17 and the plus pole 18a of the parallel block 18 are close to each other, the plus poles 17a and 18a are easily connected to the minus pole 17b. , 18b, the distance between the terminals can be increased, and the risk of short circuit between the parallel block 17 and the parallel block 18 can be reduced.

  The container-based independent power supply device according to the present invention includes a solar cell and a power storage device in a container, and can maintain the voltage of the power storage device in a standby state so that power can be supplied. It can also be applied to medical, communication, construction site, evacuated housing, and other uses as a power supply for disaster-affected areas and as an auxiliary power supply that can supply power in response to sudden power outages.

DESCRIPTION OF SYMBOLS 1 Container 2 Solar cell 3 Power storage device 4 External load 4a Illuminator 4b Exhaust fan 4c Streetlight 5 Control part 6 Selection switch 7 External load switch 8 Charging switch 9 Charging device 10 Voltage sensor 11 Linkage switch 12 Power conditioner 13 Sealed battery 13a Safety valve 14 Series block 15 Thermal shutdown unit 16 Vertical series block 17 Parallel block 18 Parallel block

Claims (8)

In an independent power supply container use, provided with a solar cell in the outer top or side of the container, the conjunction store electricity obtained from the solar cell, the power storage device for supplying the external load stored electrical container And a control unit that monitors the voltage of the power storage device and controls charging and discharging of the power storage device, and a selection switch that can select an operation mode of the independent power supply using the container as a normal mode or a standby mode. When the standby mode is selected by the selection switch, the control unit stops discharging to the external load, and when the voltage of the power storage device becomes smaller than a predetermined lower limit voltage V1, the solar cell From the solar battery to the power storage device when the voltage of the power storage device becomes equal to or higher than a predetermined upper limit voltage V2. Independent power supply container use, characterized in that the stop. In an independent power supply container use, provided with a solar cell in the outer top or side of the container, the conjunction store electricity obtained from the solar cell, the power storage device for supplying the external load stored electrical container And a control unit that monitors the voltage of the power storage device and controls charging and discharging of the power storage device, and a selection switch that can select an operation mode of the independent power supply using the container as a normal mode or a standby mode. When the selection switch is maintained in the standby mode, the control unit starts charging from the solar cell to the power storage device when a predetermined time has elapsed after stopping charging, and When the voltage becomes equal to or higher than a predetermined upper limit voltage V2, charging from the solar cell to the power storage device is stopped. Location. The said control part charges the said electrical storage apparatus from the said solar cell only for setting time periodically every day until the voltage of the said electrical storage apparatus becomes the predetermined | prescribed upper limit voltage V2. Independent power supply for container use. The solar cell has a power conditioner connected via a connection switch, and the selection switch is provided with a connection mode. When the connection mode is selected, the control unit charges the power storage device. 3. The container-based independent power supply device according to claim 1, wherein the power supply by the grid interconnection is made possible by stopping the connection and converting the direct current from the solar cell into an alternating current by closing the interconnection switch. The power storage device is an assembly of a plurality of series blocks in which at least two sealed batteries are connected in series and a sealed battery in which the series blocks are connected in parallel. The container-based independent power supply device according to claim 1 or 2, wherein a bimetal type thermal shut-off unit is provided for shutting off the heat shield, and the thermal shut-off unit is connected in series to the wiring of the series block. When the ambient temperature becomes high, the sealed battery includes a safety valve that discharges generated gas accumulated therein, and a set temperature at which the heat-sensitive shut-off unit attached to the sealed battery is activated is equal to or lower than the operating temperature of the safety valve. The independent power supply using a container according to claim 5. The power storage device includes a series block in which at least two sealed batteries are arranged in a vertical direction and connected in series, and a parallel block in which a plurality of the series blocks are arranged in a horizontal direction and the series blocks are connected in parallel. The container-based independent power supply device according to claim 5. 8. The container-based independent power supply device according to claim 7, wherein when there are a plurality of the parallel blocks, the power storage device is arranged in parallel in the vertical direction and connected in parallel.

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