JP2010182541A - Charge accumulation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a charge accumulation device arranged with a storage battery, and an alternating current power supply control part for supplying alternating current power from the battery, in a casing for preventing rain from intruding, while taking installation in the outdoor into consideration. <P>SOLUTION: This charge accumulation device includes the rectangular parallelopiped casing with a circumference surrounded by a metal plate, an inside of the casing is partitioned into right and left spaces by a wall, a lithium ion battery box-packaged integrally with a plurality of cells and a charging unit for the lithium ion battery are arranged vertically-separatedly in one of the right and left spaces, the alternating current power supply control part for supplying the alternating current power from the battery is arranged in the other of the right and left spaces, with a heat radiation space in a space formed with respect to a wall face of the other space. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power storage device in which a lithium ion battery and an AC power supply controller for supplying AC power from the battery are arranged in a rectangular parallelepiped casing.

  There is a solar cell power generation system in which a storage battery, a storage battery monitoring circuit, and a bidirectional power conversion circuit are attached to one surface of a rectangular panel solar cell via a heat insulating material (Patent Document 1).

  When this system is used for outdoor installation, it is configured to accommodate them in the casing in order to protect them from rain, but the storage battery, storage battery monitoring circuit, and bidirectional power conversion circuit are arranged on the same side surface For this reason, the storage battery, the storage battery monitoring circuit, and the bidirectional power conversion circuit are accommodated in the same space, and the storage battery, the storage battery monitoring circuit, and the bidirectional power conversion circuit become undesirably high due to the heat generated from them. In addition, when a lithium ion battery is used as a storage battery, since a plurality of cells are packed together to form a lithium ion battery, one of the cells deteriorates and the cell is ignited or overcharged. When the battery balance is lost and fire occurs, the influence directly affects the storage battery monitoring circuit and the bidirectional power conversion circuit, and they are damaged.

JP 2000-181556 A

  In view of such a point, the present invention is a storage device in which a storage battery and an AC power supply control unit that supplies AC power from the battery are arranged in a casing where rain does not enter in consideration of being installed outdoors. provide. In this case, the storage battery and the AC power supply control unit are arranged in separate areas in the casing, and the heat dissipation effect of the AC power supply control unit is promoted, thereby stabilizing the operation. In addition, the present invention provides a power storage device having a so-called explosion-proof configuration in which even when the storage battery ignites or explodes, the AC power supply control unit is not damaged thereby.

  The first invention includes a lithium ion battery including a rectangular parallelepiped casing surrounded by a metal plate, the inside of the casing being partitioned into left and right spaces by a wall, and a plurality of cells integrally boxed and the lithium ion A battery charging unit is arranged vertically in one of the left and right spaces, and an AC power supply controller that supplies AC power from the battery is disposed in the other space of the left and right spaces. It is characterized in that it is disposed with a heat radiation space between the wall surface.

  According to a second invention, in the first invention, the AC power supply control unit converts the DC power supplied from the lithium ion battery into AC power of a predetermined frequency corresponding to a predetermined power system; A switching unit that controls supply of the AC power to the predetermined power system, and the DC / AC conversion unit and the switching unit have a heat radiation space between the wall surface of the other space. A fan is provided that is divided into upper and lower portions and stirs the air in the heat dissipation space.

  The third invention includes a distribution board for distributing commercial power to home wiring, a lithium ion battery in which a plurality of cells are boxed together, a charging unit for charging the lithium ion battery with the commercial power, A DC / AC converter that converts DC power supplied from a lithium ion battery into AC power having a predetermined frequency corresponding to commercial power; a boosting unit that increases DC voltage supplied from a solar battery; and A switching unit that performs supply control of the AC power to the wiring, charging control of the lithium ion battery by the charging unit, and charging control of the lithium ion battery by the boosting unit, and a rectangular parallelepiped shape that is surrounded by a metal plate And the inside of the casing is divided into left and right vertical spaces by walls, and the lithium ion battery and the charging unit The left and right vertical spaces are vertically divided into one vertical space, and the distribution board, the DC / AC converter, and the booster unit are disposed in the other vertical space of the left and right vertical spaces. The heat dissipating space is provided between the wall surface and the upper and lower parts, and the switching unit is disposed on the rear surface of the distribution board.

  In the case of a casing structure in which rain does not enter in consideration of being installed outdoors according to the present invention, the storage battery and the AC power supply control unit are arranged in separate areas in the casing by walls. Therefore, even when the lithium ion battery ignites or explodes for some reason, the AC power supply control unit is not damaged by this, and the damage can be reduced. In addition, since the heat generated from the AC power supply control unit is formed with a heat dissipation space between the wall surface of the space, the heat generated from the AC power supply control unit is dissipated into the heat dissipation space, It is dissipated from the wall surface of the heat radiating space to the outside, the temperature increase of the AC power supply control unit can be suppressed, and a stable operation can be obtained as a power storage device installed outdoors.

  In addition, the heat dissipation space can also function as an installation area for the fan, thereby agitating the air in the heat dissipation space to promote heat exchange with the external air through the wall of the heat dissipation space, and supplying AC power The control unit can be kept at a temperature state where stable operation can be maintained.

  Further, when the lithium ion battery is a power storage device that is charged from at least one of a solar battery and a commercial power source, a lithium ion battery, a charging unit, a distribution board, Even in the case of a power storage device that accommodates a DC / AC conversion unit, a boost unit, and a switching unit, a compartment in which a lithium ion battery and its charging unit are housed and a compartment in which others are housed are separated. Even when the lithium ion battery ignites or explodes for some reason, it is possible to prevent damage to the portion accommodated in the other space. In addition, since the heat generated from the DC / AC converter or the like has a heat dissipation space formed between the heat dissipation space and the wall surface of the space, the heat is dissipated into the heat dissipation space, and from the wall surface of the heat dissipation space to the outside. As a power storage device that is installed outdoors, an explosion-proof configuration and stable operation can be obtained.

It is a front perspective view which shows the internal arrangement | positioning of the electrical storage apparatus which concerns on this invention. It is a back perspective view showing the internal arrangement of the power storage device concerning the present invention. It is a front view which shows the internal arrangement | positioning of the electrical storage apparatus which concerns on this invention. It is a right view of FIG. 3 which shows the internal arrangement | positioning of the electrical storage apparatus which concerns on this invention. It is a left view of FIG. 3 which shows the internal arrangement | positioning of the electrical storage apparatus which concerns on this invention. It is an explanatory enlarged view which shows arrangement | positioning of each part in FIG. 5 in the state which removed the metal plate of the front surface of a casing, and a thermal radiation state. It is a perspective view which shows the support state of the DC / AC conversion part of the electrical storage apparatus which concerns on this invention. It is a perspective view which shows the support state of the pressure | voltage rise unit of the electrical storage apparatus which concerns on this invention. It is a perspective view which shows the support state of the distribution board and fan of the electrical storage apparatus which concerns on this invention. It is one electric power supply system diagram of the electrical storage apparatus which concerns on this invention. It is a front view which shows internal arrangement | positioning when the electrical storage apparatus which concerns on this invention is equipped with two lithium ion batteries.

  Hereinafter, an embodiment of a power storage device 1 according to the present invention will be described with reference to the drawings. The power storage device 1 of the present invention includes a rectangular parallelepiped casing 2 surrounded by a metal plate 2B. The casing 2 is partitioned into left and right spaces 4 and 5 by a metal plate wall 3, and a plurality of cells are arranged. A known lithium ion battery 6 and a charging unit 7 for the lithium ion battery 6 that are integrally packed are vertically divided into one of the left and right spaces 4 and 5 (the right space 5 in FIG. 3). 5, the AC power supply control unit 8 for supplying AC power from the battery 6 forms a wall surface forming the other space (left space 4 in FIG. 3). 9 is disposed with a heat radiation space 10 between them.

  This will be specifically described below. 1 to 4, a rectangular parallelepiped casing 2 is formed by combining a plurality of metal columns 2A having an L-shaped cross section in the vertical direction and the horizontal direction to form a rectangular parallelepiped skeleton. A flat metal plate 2B is attached to the metal column 2A with screws or the like so as to cover the left and right side surfaces and the bottom surface. The casing 2 thus configured is in a state in which the front surface, back surface, left and right side surfaces, and bottom surface are completely covered, and rain does not enter the interior, but the internal temperature rise is reduced. Alternatively, a special ventilation portion may be formed (for example, a slit structure with a lid) so that rain does not invade but air is circulated.

  A rectangular parallelepiped space in the casing 2 is partitioned into left and right spaces 4 and 5 by a wall 3 formed of a metal plate, and one of the left and right spaces 4 and 5 (right space 5 in FIG. 3) includes a plurality of spaces. A known lithium ion battery 6 in which cells are packed together and a charging unit 7 of the lithium ion battery 6 are arranged separately in the upper and lower sides. The right space 5 is partitioned into upper and lower storage chambers 5A, 5B, and 5C by metal shelf plates 11A and 11B, and a heavy lithium ion battery 6 is placed and stored in the lowermost storage chamber 5A. The charging unit 7 is placed and accommodated in the accommodation chamber 5B.

  Also, in the other space of the left and right spaces 4 and 5 (left space 4 in FIG. 3), an AC power supply control unit 8 that performs a control operation to supply AC power from the lithium ion battery 6 surrounds the left space 4. 9 is disposed with a heat radiation space 10 between them. The AC power supply controller 8 converts a DC power supplied from the lithium ion battery 6 into an AC power having a predetermined frequency corresponding to a predetermined power system, and the AC power is converted to a predetermined power system. And a switching unit 13 that performs supply control to the power source. The DC / AC conversion unit 12 and the switching unit 13 are arranged separately in a vertical direction with a heat dissipation space 10 between the wall surface 9 of the left space 4, and a fan 14 for stirring the air in the heat dissipation space 10 is provided. . In the embodiment, the predetermined power system is a home wiring 32 that uses commercial power 30 of 50 Hz or 60 Hz.

  The DC / AC converter 12 and the switching unit 13 are directly or indirectly applied to the support 2A located in the left and right portions of the left space 4 or the left and right support rods 16 that extend substantially horizontally to the front and rear support rods 15 supported by the support columns 2A. It is supported by.

  The power storage device 1 shown in the embodiment uses a wiring that distributes commercial power 30 of 50 Hz or 60 Hz to the home wiring 32 and a DC voltage supplied from a solar cell (also referred to as a solar cell panel) 31 installed outside the casing 2. Wiring for boosting and charging the lithium ion battery is provided. For this reason, in the left space 4 in the casing 2, in addition to the DC / AC conversion unit 12 and the switching unit 13, commercial power 30 of 50 Hz or 60 Hz that has passed through the power meter 34 is connected to the home wiring 32 via each breaker. A distribution board 33 that distributes power to and a booster unit 35 that increases the DC voltage supplied from the solar cell 31 are housed. In these arrangements, the booster unit 35 is supported by the left and right support rods 16 in the lower part of the left space 4, the DC / AC converter 12 is supported by the left and right support rods 16 in the middle portion of the left space 4, and the left space 4 The distribution board 33 is supported by the left and right direction support rods 16 at the top of the circuit board, and the wiring board 13A of the switching unit 13 is attached to the back of the distribution board 33.

  With the above arrangement, the booster unit 35, the DC / AC converter 12, and the distribution board 33 are in a state where the heat radiating space 10 exists between the wall surface 9 surrounding the left space 4. The charging unit 7, the DC / AC converter 12, the distribution board 33, and the booster unit 35 are box types housed in cases, respectively, and the front face is an open / close lid for internal maintenance, inspection, operation, etc. It is the structure which can be opened and closed with. For this reason, the front plate 2B of the casing 2 is detachably attached to the support column 2A with screws for internal maintenance, inspection, operation, and the like.

  The DC / AC converter 12, the switching unit 13, the distribution board 33, and the booster unit 35 take into consideration internal maintenance, inspection, operation, etc., and also consider the influence of heat generated from these and the dissipation of the heat. The left space 4 is partitioned into a front space 4A and a rear space 4B by a metal partition plate 36 that is divided into front and rear portions, and on the front side of the partition plate 36, the booster unit 35, the DC / AC conversion unit 12, The front surface of the electrical panel 33 is located to facilitate maintenance, inspection, operation, etc. of these interiors. Among the DC / AC conversion unit 12, the switching unit 13, the distribution board 33, and the boosting unit 35, heat generation is large in the DC / AC conversion unit 12 and the boosting unit 35. The partition plate 36 is in a state of being diffused into the rear space 4B. The fan 14 is attached to the front-rear direction support bar 15 or the left-right direction support bar 16 in the rear space 4B on the rear side of the partition plate 36. Although the number of the fans 14 is two in the figure, one may be installed or three may be arranged at intervals in the vertical direction.

  In this regard, FIG. 7 shows a support state of the DC / AC converter 12. The DC / AC conversion unit 12 is locked so that the upward hook 41 attached to the left and right direction support rod 16 enters into the locking portion 12B of the lower surface opening formed on the rear surface of the case. This is a mounting structure in which the DC / AC converter 12 is held using the weight of 12. A heat dissipation hole 12A is formed at a position facing the rear space 4B on the upper and lower surfaces of the case of the DC / AC conversion unit 12, and the heat of the DC / AC conversion unit 12 is transferred from the heat dissipation hole 12A. It is discharged into the rear space 4B and stirred by the fan 14. Further, as shown in FIG. 8, the booster unit 35 has a plurality of longitudinal fins 35 </ b> A arranged in parallel at a position facing the rear space 4 </ b> B on the rear surface of the case, with a horizontal air circulation interval. The heat of 35 is discharged from the fins 35 </ b> A to the rear space 4 </ b> B and stirred by the fan 14.

  FIG. 9 shows a support state of the distribution board 33 and a support state of the fan 14. In the front space 4A on the front side of the partition plate 36, a distribution board 33 is arranged attached to the front-rear direction support bar 15 or the left-right direction support bar 16, and in the rear space 4B on the rear side of the partition plate 36, the front-rear direction The switching unit 13 and the fan 14 attached to the support bar 15 or the left-right support bar 16 are arranged, and the air in the rear space 4B is stirred by the fan 14 so that the metal plate 2B that is the peripheral wall of the rear space 4B and the outside air Heat exchange is promoted, and the temperature of the rear space 4B is suppressed to about 50 to 60 ° C. As a result, the DC / AC converter 12, the switching unit 13, the distribution board 33, and the booster unit 35 are in a state in which stable operation can be maintained.

  In order to promote heat exchange between the metal plate 2B and the outside air, a plurality of vertical fins 40 are arranged in parallel on the back side of the metal plate 2B in the rear space 4B with air circulation intervals. Thus, the heat of the rear space 4B is dissipated from the fins 40 to the outside air through the metal plate 2B on the back side of the rear space 4B.

  In such a configuration, the switching unit 13 controls the supply of AC power supplied from the DC / AC conversion unit 12 to the home wiring 32, the charge control of the lithium ion battery 6 by the charging unit 7, and the lithium by the boost unit 35. A switch operation for controlling charging of the ion battery 6 is performed. For this reason, as shown in FIG. 6, the switching unit 13 controls the switching operation time by the 24-hour timer 37, and the DC power supplied from the lithium ion battery 6 is used as the AC power at the time determined as daytime. The DC / AC conversion unit 12 that does not supply the AC power to the home wiring 32 and also uses the AC power of the commercial power 30 that has passed through the distribution board 33 as DC power. Controls so that the DC power is not supplied to the charging unit 7.

  In the time determined as daytime, the switching unit 13 controls the boost unit 35 to an operating state in which the DC voltage supplied from the solar cell 31 is increased, and the lithium ion is supplied by the DC voltage supplied from the solar cell 31. The battery 6 is charged. Note that the switching unit 13 prevents the lithium ion battery 6 from being overcharged by setting the boosting unit 35 to an inoperative state when the detection unit (not shown) detects the fully charged state of the lithium ion battery 6.

  Further, the switching unit 13 causes the DC / AC conversion unit 12 to supply the AC power to the home wiring 32 during the time determined by the 24-hour timer 37 as nighttime other than daytime. In addition, since the solar cell 31 does not substantially function at night, the lithium ion battery 6 is charged through the AC / DC converter 38 by the commercial power 30 and the charging circuit through the booster unit 35 is cut off. Thus, the switching unit 13 operates.

  In FIG. 11, two known lithium ion batteries 6 in which a plurality of cells are integrally boxed are arranged in one of the left and right spaces 4 and 5 in the casing 2 (the right space 5 in FIG. 3). The configuration is shown. Therefore, in the right space 5, a heavy lithium ion battery 6 is placed and accommodated in the lowermost accommodation chamber 5A and the middle accommodation chamber 5B, and the charging unit 7 is placed and accommodated in the uppermost accommodation chamber 5C. Has been. Correspondingly, in FIG. 10, the added lithium ion battery 6 is indicated by a dotted line. Since the other parts are the same as those shown in FIGS. 1 to 10, the same portions shown in FIGS. 1 to 10 are indicated by the same reference numerals in FIG.

  Note that the power storage device 1 has a caster 39 attached to the bottom of the casing 2 to facilitate movement. The caster 39 is provided with a known stopper device (not shown), and the power storage device 1 can be kept at the place by the stopper device while being moved to a predetermined location.

  The power storage device according to the present invention is not limited to the configurations shown in the above-described embodiments, and can be applied to various forms, and includes various forms within the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Power storage device 2 ... Casing 2A ... Metal support 2B ... Flat metal plate 3 ... Wall 3A ... Refrigerant storage part 4. ··· Left side space 4A ··· Front space 4B ··· Rear space 5 ··· Right side space 5A, 5B, 5C ··· Storage chamber 6 ··· Lithium ion battery 7 · · · ··· Charging unit 8 ··· AC power supply controller 9 ··· Wall surface surrounding left side space 4 · 9A · · · Inner pipe 10 ··· Heat dissipation space 11A, 11B ··· Metal shelf 12... DC / AC conversion unit 13... Switching unit 13
14 .... Fan 15 .... Front / rear support rod 16 .... Left / right support rod 30 ... Commercial power 31 ... Solar cell 32 ... Home wiring 33 ...・ Distribution panel 34 ・ ・ ・ ・ Power meter 35 ・ ・ ・ ・ Boosting unit 36 ・ ・ ・ ・ Partition plate 37 ・ ・ ・ ・ Timer 38 ・ ・ ・ ・ AC / DC converter

Claims (3)

  A lithium ion battery comprising a rectangular parallelepiped casing surrounded by a metal plate, the inside of the casing being divided into left and right spaces by walls, and a plurality of cells being integrally boxed, and a charging unit for the lithium ion battery, The left and right spaces are divided into upper and lower spaces, and in the other space of the left and right spaces, an AC power supply control unit for supplying AC power from the battery is provided between the wall of the other space. A power storage device, characterized in that it is disposed with a heat dissipation space.   The AC power supply control unit converts a DC power supplied from the lithium ion battery into an AC power having a predetermined frequency corresponding to a predetermined power system, and the AC power is converted into the predetermined power system. The DC / AC conversion unit and the switching unit are arranged separately in a vertical direction with a heat dissipation space between the wall surface of the other space, and the heat dissipation space. The power storage device according to claim 1, further comprising a fan that stirs the air.   A distribution board that distributes commercial power to home wiring, a lithium-ion battery in which a plurality of cells are packed together, a charging unit that charges the lithium-ion battery with the commercial power, and a supply from the lithium-ion battery DC / AC converter that converts the direct-current power to AC power of a predetermined frequency corresponding to commercial power, a booster unit that increases the direct-current voltage supplied from the solar cell, and the alternating current to the home wiring A switching unit that performs power supply control, charging control of the lithium ion battery by the charging unit, and charging control of the lithium ion battery by the boosting unit, and a rectangular parallelepiped casing surrounded by a metal plate , The casing is partitioned into left and right vertically long spaces by walls, and the lithium ion battery and the charging unit are The vertical space is divided into one vertically long space, and the distribution board, the DC / AC converter, and the booster unit are arranged in the other vertical space of the left and right vertical spaces, and the wall surface of the other space. A power storage device, wherein a heat radiating space is provided between the switchboard and the switching unit on the back of the distribution board.

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