JP6103310B2 - Enclosure - Google Patents

Description

  The present invention relates to a housing to which power generated by a solar cell is supplied.

In recent years, power converters that convert DC power generated by solar cells into AC power and superimpose it on the system have been used.

For example, what is provided with the electrical storage apparatus as described in patent document 1 is known. In the daytime, the electric power generated by the solar battery was supplied to the storage battery and charged, and in the night, the storage battery was charged with the electric power from the system, corresponding to the output of AC power regardless of day or night.

Japanese Patent No. 3181423

For example, when performing solar cell damage, power conversion device failure, maintenance, etc., the inside of the housing of the device is opened for safety and, for example, the trouble of manually operating a predetermined switch provided in the housing It was necessary to work.

However, when the above operation is performed by opening the casing and exposing the internal substrate or circuit in this way, a specialist person such as a service person normally performs, but this service person arrives. In many cases, there are cases where the user has to manually operate the switch instead of the service person in an emergency such as damage to the solar cell due to a disaster such as an earthquake or a typhoon. It is difficult for the user who is unfamiliar with the operation to operate the switch as described above. Also, when performing such circuit opening operation, capacitors, transformers, resistors, transistors, and other electronic components are installed on the circuit near this switch. If touched, some parts may cause burns due to heat generation or dangerous electric shocks.

Accordingly, an object of the present invention is to enable anyone to easily and reliably operate the switch when work such as damage to the solar cell, failure of the power conversion device, or maintenance is necessary. Is to provide things.

The present invention provides a case where a DC power obtained from a solar battery is supplied and a predetermined waterproof performance is installed outdoors, and a switch box is protruded or recessed in a part of the waterproof case. Provided with a waterproof packing and a cover screwed on the switch box, and equipped with a manual switch protruding from the bottom of the switch box to stop operation with DC power obtained from solar cells It is.

According to the housing of the present invention, for example, when work such as damage, failure, or maintenance of a solar cell is necessary, anyone can easily operate the switch to stop the driving operation. It becomes possible.

It is a perspective view which shows the external appearance of the apparatus which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the whole structure of the power supply system containing the apparatus. It is a disassembled perspective view which shows the installation position of the manual switch in the housing | casing of the apparatus. It is explanatory drawing which shows the internal structure in the main-body part of the housing | casing of the apparatus. It is a circuit diagram which shows the electrical whole structure of the power supply system containing the apparatus. It is a principal part perspective view which shows the state which mounted the lithium battery as a battery module in the apparatus. It is a principal part perspective view which shows the state which mounted another large sized lithium battery as a battery module in the apparatus. (A) is a perspective view which shows the external appearance of the apparatus which concerns on the 2nd Embodiment of this invention, (B) is a disassembled perspective view which shows the principal part. (A) is a perspective view which shows the external appearance of the housing | casing upper part side of the apparatus which concerns on the 3rd Embodiment of this invention, (B) is a disassembled perspective view which shows the principal part. (A) is a perspective view which shows the whole housing | casing of the apparatus which concerns on the 4th Embodiment of this invention, (B) is an exploded perspective view which shows the principal part, (C) is principal part sectional drawing of (B). is there.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.
[First Embodiment]
FIG. 1 shows a power storage device 1 according to a first embodiment of the present invention. As shown in FIG. 2, the power storage device 1 has an input connected to a connection box 3 connected to a solar cell 2, and an output connected to an input of a power conversion device (hereinafter referred to as “power converter”) 4. As shown in FIG. 3, the switch box provided at the top of the housing 10 is provided with a manual switch SW. In FIG. 2, reference numeral 5 indicates a remote controller for operating the power storage device 1, and reference numeral 6 indicates a distribution board.

The solar battery 2 is formed by connecting a plurality of solar battery cells in series and in parallel to have a predetermined rated voltage and / or parallel connection, and has a rated voltage of 300 V, an output of 2.4 kW, an output of 4.8 kW, and the like.

The connection box 3 is for connecting the string of photovoltaic modules and the power conditioner 4.

The power conditioner 4 converts DC power obtained from sunlight, which is a renewable energy source, through the solar cell 2 into AC power and superimposes it on the AC power from the system in the house. on the other hand,
The power storage device 1 charges and discharges DC power with respect to an on-board storage battery. This power storage device 1 is connected to a power line through which DC power supplied from the solar cell 2 through the junction box 3 flows, and the DC power obtained through the solar cell 2 is supplied to the battery module B (see FIGS. 4 and 5). ) And discharging from the battery module B are appropriately performed.

The battery module B is configured to connect a plurality of cells so as to obtain a desired rated voltage and charge capacity, and is mounted in a replaceable state in a battery chamber below the casing 10 described later. .

In the power storage device 1 of the present embodiment, the housing 10 has a main body 10A and the top plate 1 of the main body 10A.
1 is a cover 10 that has a waterproof function and is fixed by being screwed to the upper part of the main body 10A.
B.

In the main body 10A, a front panel 12 is detachably screwed into an opening 13 (see FIG. 4) opened to the front (front). The internal space of the main body 10A is divided into a battery chamber and a substrate chamber that accommodates a circuit board P on which various electronic components to be the control unit 20 are mounted, with the partition plate S as a boundary. When the main body 10A is attached to the top plate 11 above the substrate chamber by screwing it through a waterproof packing (not shown) so as to cover the cover 10B from above, the top plate 11 and the cover 10B are attached. A certain large space serving as a switch box is formed between the two. In this space, an operation unit of the manual switch SW is installed.

The main body 10A is closed in a watertight state by attaching the front panel 12 to the opening 13 via a seal member such as a rubber packing (not shown), so that the battery module B and the circuit board P can be replaced or maintained. It can be removed to perform necessary work. In addition, the main body 10A has a manual switch SW operating portion projecting from the top plate 11 in order to open the circuit of the DC power from the solar cell by manual operation when necessary. The power storage device 1 is installed outdoors where there is a risk of being exposed to rainwater. Even if the cover 10B is removed from the housing 10 and the manual switch SW is opened and closed outdoors, the interior of the main body 10A In order to prevent rainwater or the like from entering the main body, the main body 10A including the top plate 11 is provided.
The structure itself has a waterproof function.

The cover 10B is removed when the manual switch SW is operated to expose the operation portion of the manual switch SW, and is usually fixed to the main body portion 10A. That is,
This cover 10B is normally fixed to the main body 10A in a watertight manner so as to cover the main body 10A of the housing 10 from above via a seal member such as a rubber packing (not shown).

The circuit board P is integrally assembled with the chassis 30 and is fixed to the upper surface of the partition plate S that partitions the battery chamber and the board chamber via the chassis 30. The component is mounted.

The control unit 20 has a circuit configuration as shown in FIG. 5, for example. That is, this control unit 20
Are two sets of single-layer inverter circuits 21 and 2 in which four switching elements are connected in a bridge shape.
2 and the transformer 23 constitute a charge / discharge circuit. Capacitors 24 and 25
The resistor 26 is a capacitor for smoothing during boosting, and is a protective resistor.
The current detectors 27 and 28 are for detecting the power generation current of the solar cell 2 and the current supplied to the power conditioner 4. The current detectors 27 and 28 detect the potential at the connection point V to detect the detected current value. Each power value can be specifically obtained from the product of the voltage value.

The manual switch SW constitutes a manual switch unit that opens and closes an electric circuit connected to the DC power line connecting the solar cell 2 and the power conditioner 4. For example, the manual switch SW breaks the solar cell 2 or the power conditioner 4.
Is disconnected from the solar cell 2 at the time of failure or necessary maintenance. The operation part of the manual switch SW of this embodiment is composed of a rotary switch in order to perform the operation stop operation. However, as long as the same effect can be obtained, the operation part is not limited to this switch. .

Next, the structure of the battery chamber inside the housing 10 according to the present embodiment will be described with reference to FIGS. The battery chamber that occupies the lower part inside the housing 10 is provided with a spacer 40 and a rack 50 that constitute fixing means for the battery module so that the battery chamber can be replaced with a member corresponding to the battery module to be mounted.

Among them, the spacer 40 has a structure in which five members (hereinafter, rectangular members) 41 are fixed at regular intervals, and each battery constituting the battery module, particularly lead, in a gap between the rectangular members 41. A type of storage battery (four stations) is fixed.

Further, in order to mount a single lithium ion battery on the upper surface of the rectangular member 41, the rectangular member 41 is screwed through the round hole on the bottom surface side of the L-shaped metal fitting 43 shown in FIG. 42 is provided (it is not always necessary to install all of them, but in order to be able to select an arbitrary one, all five may be opened).

On the other hand, the rack 50 is configured by a support shelf 53 that is fixed at equal intervals in the round holes 52 of the pillar 51 and is provided to withstand a predetermined load. The support shelf 53 is provided with a screw hole 54 for fixing the battery.

For example, when a lithium ion type battery B <b> 2 having a relatively flat shape as shown in FIG. 6 is mounted, it is fixed to the screw hole 55.

Further, for example, as shown in FIG. 7, it is possible to mount another large lithium ion type battery B3 that can be completed with a predetermined capacity. In this battery B3,
A screw hole 56 is provided at a predetermined position on the front surface.

Therefore, in the case of the battery B3, the spacer 4 is used by utilizing the dedicated L-shaped metal fitting 43 or the like.
0 Between the screw hole 42 provided on the upper surface and the screw hole 56 provided on the front surface of the battery B3, the hole of the L-shaped metal fitting 43 serving as a fastener (the female screw is not cut on the inner peripheral surface of this hole). Insert the screw in a state where it penetrates, and fasten it to the screw hole between them.

By the way, for example, when the solar cell is damaged, the power conversion device is broken, or maintenance is performed, it is necessary to disconnect the power storage device 1 from the power supply system. However, conventionally, it has been necessary to open the inside of the housing and open the electric circuit with an internal switch.

On the other hand, according to the present embodiment, the inside of the housing 10 is opened to expose the circuit board P.
There is no need to perform specialized work by service personnel. That is, when the screw 10 is removed from the housing 10 in the state shown in FIG. 1 and the cover 10B is removed from the main body 10A of the housing 10, the manual switch SW protruding from the top plate 11 of the main body 10A as shown in FIG. Thus, the manual operation of the manual switch SW can be easily performed in this state. In this way, the possibility of touching high voltage components on the circuit board P, elements that generate a large amount of heat, and the like is eliminated, and even a general user can safely operate the manual switch SW.

Further, since it is not necessary to expose the circuit board P, a dangerous electric shock accident is not caused.
Furthermore, according to this embodiment, even if there is no electrical knowledge, the switch operation can be performed in a relatively short time by simply removing the cover 10B. Therefore, an emergency due to damage to the solar cell due to a disaster such as an earthquake or a typhoon is possible. In some cases, it is possible to respond quickly and reliably to shutdown operations.

[Second Embodiment]
FIG. 8 shows a power storage device 1B according to the second embodiment of the present invention. In the second embodiment, a switch box 61 covered with a switch cover 62 is provided integrally with a part of the top surface 60A of the casing 60 (a part near one end) so as to protrude. 6
1 is different from the first embodiment in that the same manual switch SW as that of the first embodiment is provided inside.

A switch cover 62 is attached to the switch box 61 so as to be removable with screws. Since this embodiment is also installed outdoors that may be exposed to rainwater, a seal member such as rubber packing is attached to the switch cover 62 on the inner peripheral surface (not shown) to ensure a waterproof structure. Has been.

Therefore, according to the present embodiment, since the manual switch SW protrudes in the switch box 61 provided on the top surface 60A of the housing 60, the manual operation of the manual switch SW does not require an unreasonable posture. Easy to do.

[Third Embodiment]
FIG. 9 shows a power storage device 1C according to the third embodiment of the present invention. In the third embodiment, a switch box 71 is integrally provided in a part on the side surface 70A side of the housing 70 in a depressed state, and the same manual operation as that of the first embodiment is provided in the switch box 71. The difference between the first and second embodiments is that a switch SW is provided. Further, the upper side of the casing 70 is formed in a bowl shape projecting outward, and if it rains a little, it is possible to protect the switch box 71 from rainwater at the part of the bowl 70B. It has become.

A switch cover 72 having a seal member such as rubber packing attached to an inner peripheral surface (not shown) is detachably attached to the switch box 71 with a screw, and a waterproof state is secured.

The switch cover 72 is formed in a substantially rectangular shape with each side larger than the switch box 71, and is screwed into a screw hole provided in the peripheral side surface 70 </ b> A so as to surround the switch box 71. Yes. The switch cover 72 is provided with a rubber packing 72 </ b> A around a seal wall that protrudes in a substantially square shape on the inner surface facing the switch box 71.

Therefore, according to the present embodiment, the housing 70 is provided to be recessed inward from the side surface 70A, and
Although the manual switch SW protrudes in the switch box 71 covered with the switch cover 72, it is convenient because insertion of rainwater into the switch box 71 can be avoided to some extent by the eaves 70B.

[Fourth Embodiment]
FIG. 10 shows a power storage device 1D according to the fourth embodiment of the present invention. In the fourth embodiment, a step that rises one step along the entire peripheral edge portion of the switch box 81 so as to surround the switch box 81 that is integrally provided in a part of the side surface 80A of the housing 80. Portion 81A is provided, and the switch cover 82 is embedded in the stepped portion 81A.
It is screwed into a screw hole provided in the step portion 81A.

Also in this power storage device 1D, similarly to the third embodiment, both upper sides of the casing 80 are formed in a bowl shape protruding outward. It is also possible to protect the switch box 81 from rainwater at a portion.

The switch cover 82 is formed in a substantially rectangular shape with each side having the same size as the depression of the switch box 81, and is fitted into the depression of the switch box 81, which is a dedicated space for the manual switch SW, without any gap. The outer surface is flush with the side surface 80A. Also,
The switch cover 82 is also provided with a rubber packing 82 </ b> A around a sealing wall protruding in a substantially square shape on the inner surface facing the switch box 81.

Therefore, according to this embodiment, since the switch cover 82 is attached to the side surface 80A of the housing 80 in a flush state, it is not only convenient in appearance but also effectively prevents rainwater from entering. it can.

In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible in the range which does not deviate from the summary as described in a claim.

1A to 1D Power storage device 2 Solar cell 3 Junction box 4 Power conversion device (Powercon)
5 Remote control for power storage device operation 6 Distribution board 10, 60, 70, 80 Case 10A Main body 10B Cover 11 Top panel 12 Front panel 13 Opening 20 Control unit 30 Chassis 40 Spacer (fixing means)
41 Rectangular member 42 Screw hole 43 L-shaped bracket 50 Rack (fixing means)
51 Pillar 52 Round hole 53 Support shelf 70A, 80A Side surface 54, 55, 56 Screw hole 60A Top surface 61, 71, 81 Switch box 62, 72, 82 Switch cover 70B ７２ 72A, 82A Rubber packing 80B 庇 81A Step B Battery Module (storage battery)
B2 Lithium ion type battery B3 Large lithium ion type battery P Circuit board S Partition plate SW Manual switch

Claims (2)

In a case that is supplied with direct-current power obtained from a solar cell and has a predetermined waterproof performance and is installed outdoors, the switch box is protruded integrally on a part of the outer surface of the case and has a waterproof packing. And a cover that is screwed to cover the switch box and includes a manual switch that protrudes from the bottom surface of the switch box for stopping operation by DC power obtained from the solar cell. . The casing according to claim 1, wherein the manual switch opens and closes an electric circuit connected to a DC power line through which the DC power flows.