JP2013196851A - Power storage device and power storage system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power storage device and a power storage system which make a gas less likely to be accumulated in a housing while using the housing having sealability.SOLUTION: According to one embodiment of this invention, a power storage device includes: a battery housing body; a power conditioner; and a housing which houses the battery housing body and the power conditioner. The housing has sealability, and a vent hole including a waterproof breathable film is provided at the housing. The interior of the housing communicates with outer air through the waterproof breathable film.

Description

  The present invention relates to a power storage device and a power storage system.

  The power storage device includes a plurality of secondary batteries, and can discharge electricity charged in the secondary batteries as necessary. For example, it is possible to discharge electricity charged in the middle of the night at a low electricity rate in the daytime or to discharge electricity charged in the daytime by solar power generation at night. In addition, at the time of a power failure, the electricity that has been charged in the power storage device can be discharged.

  Such power storage devices are often installed in factories and business offices, but in recent years, they have also been installed in ordinary houses.

  At present, a secondary battery used in a power storage device is generally a film-clad battery. A film-clad battery includes a battery element in which a positive electrode plate and a negative electrode plate are alternately laminated via a separator, and the battery element and an electrolytic solution are enclosed in a container made of an outer film such as a laminate film.

  Patent Document 1 describes a power storage device in which a lithium ion battery in which a plurality of cells are integrally boxed is arranged in a rectangular parallelepiped casing surrounded by a metal plate. The inside of the casing is partitioned into left and right spaces by a wall, and a lithium ion battery and its charging unit are disposed in one space. In the other space, a control unit that converts and supplies power from the battery to AC power is disposed, and a heat dissipation space exists between the control unit and the wall.

  Patent Document 2 includes a battery module that stores a plurality of battery cells, and a storage case that stores the battery module, and a power storage system that converts electric charge stored in the battery module into AC power and supplies the AC power to a load. Have been described. The storage case has a rectangular parallelepiped shape with the largest area as the front surface, and a plurality of the rectangular parallelepiped battery modules are stored in the storage case. These battery modules are arranged such that the front surface portion of the storage case and the surface having the largest area of the battery module face each other, and can be inserted and removed from the side surface of the storage case. Furthermore, a control unit for controlling conversion to AC power or charging / discharging of the battery module is disposed in the storage case.

JP 2010-182541 A JP 2012-9309 A

  Since the power storage device stores batteries and electrical components, it is required to prevent foreign substances from entering from the outside. In particular, when the power storage device is installed outdoors, it is important to prevent the intrusion of rainwater and dust. From such a viewpoint, the casing is an airtight and watertight casing, that is, a casing having a sealing property. It is desirable to use it. However, the battery cells in the battery module may contain a volatile solvent having combustibility as a nonaqueous electrolytic solvent. If an unpredictable event such as a natural disaster or fire occurs, there is a possibility that combustible gas may accumulate in the airtight casing.

  In view of the above, an object of the present invention is to provide a power storage device and a power storage system in which gas does not easily accumulate in a casing while using a casing having a sealing property.

A power storage device according to one embodiment of the present invention includes:
A power storage device comprising: a battery housing; a power conditioner; and a housing that houses the battery housing and the power conditioner;
The housing has a sealing property,
The casing is provided with a vent provided with a waterproof breathable membrane, and the inside of the casing communicates with the outside air through the waterproof breathable membrane.

  A power storage system according to another aspect of the present invention includes the power storage device and a control system unit that controls the power storage device.

  According to the present invention, it is possible to provide a power storage device and a power storage system in which gas does not easily accumulate in a casing while using a casing having airtightness.

It is a perspective view of the front side which shows the external appearance of the housing | casing of the electrical storage apparatus by embodiment of this invention. It is a perspective view of the back side showing the appearance of the case of the electrical storage device by the embodiment of the present invention. It is a side view for demonstrating the inside (state which removed the side panel) of the housing | casing of the electrical storage apparatus by embodiment of this invention. It is a front view of the front side for demonstrating the inside (state which opened the front door) of the housing | casing of the electrical storage apparatus by embodiment of this invention. It is a perspective view of the front side for demonstrating the structure of the housing | casing of the electrical storage apparatus by embodiment of this invention. It is a perspective view of the rear side for explaining the structure of the housing of the power storage device according to the embodiment of the present invention. It is a perspective view of the battery container of the electrical storage apparatus by embodiment of this invention. It is a front view of the front side which shows the state which opened the front door for demonstrating the internal structure of the housing | casing of the electrical storage apparatus by this embodiment of this invention. It is a front view of the front side which shows the state which accommodated the battery container in the housing | casing. It is a perspective view of the front side which shows the process of accommodating BMU. It is a rear surface perspective view which shows the process of installing a heat insulation member. In the power storage device of the embodiment of the present invention, the maintenance door 13, the protection member 15, and the side surface of the housing are removed, and a schematic partial enlarged view in which the vicinity of the maintenance door is enlarged.

  Hereinafter, a power storage device according to an embodiment of the present invention will be described with reference to the drawings.

  According to an embodiment of the present invention, a plurality of battery containers (for example, battery modules and battery packs), a power conditioner (hereinafter referred to as “PCS unit”), a battery management unit (hereinafter referred to as “BMU”), and these Can be provided, and a power storage system including the power storage device and a control system unit (system controller) for controlling the power storage device can be provided.

  The BMU is interposed between each battery container, the PCS unit, and the control system unit, collects information on the state of each battery container, and determines the state of each battery container based on the collected information. Moreover, BMU outputs the information which shows the state of each battery container to a PCS unit and a control system unit based on a determination result.

  The PCS unit converts AC power supplied from an external power supply (commercial power supply, etc.) into DC power and outputs it to each battery container, and converts DC power supplied from each battery container into AC power. Output to the outside (load).

  The control system unit mainly includes an arithmetic processing unit, a memory, and a program stored in the memory, and comprehensively controls the power storage device. For example, the control system unit manages and controls information transmission between the BMU and the PCS unit according to a program, manages and controls the charge amount and discharge amount of the battery container, and operates the power storage device (charge mode, Switch the discharge mode). The control system unit can be disposed outside the housing as a separate body from the power storage device, for example, using a control device such as a personal computer. The control system unit may be provided in the power storage device. The above description explains the main functions of the BMU, PCS unit, and control system, and the BMU, PCS unit, and control system unit also have functions other than the above functions.

  1A and 1B are a front perspective view and a rear perspective view, respectively, showing the exterior of the housing 1. 2A and 2B are views for explaining the inside of the housing 1, FIG. 2A is a side view of the housing 1 with a side panel removed, and FIG. 2B shows a state in which the front door 11 is opened. It is a front view of the front side. 3A and 3B are perspective views for explaining the structures on the front side and the rear side of the housing 1, respectively.

  The housing 1 is a metal (for example, stainless steel) storage case having a flat rectangular parallelepiped appearance. Moreover, the housing | casing 1 has sufficient airtightness with respect to invasion of rain water and dust, and the inside air and outside air of a housing | casing are communicating through the waterproof air permeable membrane. In other words, the inside of the housing is kept ventilated outside the housing through a waterproof breathable membrane provided in a part of the housing. In the description of the present embodiment, the surface facing the installation surface (horizontal plane) such as the ground is defined as the lower surface, and the side surface including the opening 20 among the plurality of side surfaces constituting the periphery of the housing 1 is defined as the front surface. .

  In the figure, the housing 1 has a flat rectangular parallelepiped shape, the front surface portion and the rear surface portion of the housing 1 have a vertically long rectangular shape, and the side surface of the housing 1 has a wide horizontally long rectangular shape. Yes. The upper surface of the housing 1 has a rectangular shape, the two opposite sides of the upper surface are substantially the same as the horizontal length of the front and rear surfaces, and the remaining two opposite edges are substantially the width length of both side surfaces. The same. The size of the housing 1 is, for example, a height of 900 mm, a front width (the horizontal length of the front surface on which the door 11 is provided) 300 mm, and a side width (a horizontal direction extending from the front door 11 side to the rear door 12 side). Length) can be set to 800 mm.

  The housing 1 has an opening 20 on a side surface (front surface), and a front door (also referred to as a second lid) 11 that opens and closes the opening 20 (also referred to as a front-side opening or a second opening). It has been. As shown in FIGS. 1A and 3A, the front door 11 is a rotary door, and can improve workability during installation, maintenance, and inspection of the apparatus. As the front door 11, a detachable lid may be provided in place of the rotating door. Packing is provided at the contact portion between the door and the housing, and sufficient airtightness and watertightness are maintained. From the opening 20, as shown in FIG. 3A, the battery container 21 can be inserted and taken out. The BMU 22 can also be inserted and removed from the opening (front side opening) 20.

  The battery accommodating body 21 and the BMU 22 are accommodated in a battery accommodating portion disposed in the housing 1 as shown in FIGS. 2A and 2B. The stored battery housing 21 is supported by a rotating or detachable battery housing cover 24, and the movement in the take-out direction due to shaking or the like can be fixed. The battery housing cover 24 is fixed by screwing or the like.

  The battery housing body 21 has a flat rectangular parallelepiped shape, and is arranged in parallel so that its end (front surface) faces the opening surface of the opening 20. A plurality of battery containers 21 are stored in a lower storage space (also referred to as a first storage portion) and an upper storage space (also referred to as a second storage portion) to form a two-stage array. . In the example shown in FIGS. 2B and 3A, a total of six battery housings are housed, three on the lower side and three on the upper side. Adjacent battery housings face each other on the main surfaces (surfaces along the insertion direction and height direction (perpendicular to the installation surface)), and these main surfaces are the side surfaces of the housing 1 (from the front door side to the rear door side). (Side surface along the direction toward)). By arranging the flat rectangular parallelepiped battery container in this way, the battery container can be stored at high density. In addition, by arranging the plurality of battery containers 21 in parallel in this way, it is possible to avoid the effect due to the weight of the adjacent battery containers in the case where they are stacked in the horizontal position, and there is no problem due to bending or deformation. Occurrence can be prevented. When storing the battery container with multiple storage spaces, the total weight of the battery container stored in the upper storage space is between the upper storage space and the lower storage space. On the other hand, a support member having sufficient strength that does not deform and break is provided. The support member is not limited to a shelf member having a placement surface, and a frame shape or a lattice shape can also be used.

  FIG. 5 is a front view of the front side showing a state in which a front door for explaining the internal structure of the housing is opened. As shown in FIG. 5, battery storage portions (26a, 26b), which are storage spaces for the battery storage body, are provided in the housing. In FIG. 5, the battery storage section is divided into two stages, that is, an upper storage space (26a) and a lower storage space (26b). Moreover, the opening which takes in and out the battery container of a battery storage part is provided over the perpendicular direction of a front door.

  In FIG. 5, the code | symbol 27 shows the BMU accommodating part which comprises the space which accommodates BMU. In FIG. 5, the BMU storage unit 27 is disposed on the left side of the lower battery storage unit 26 b, and the BMU storage unit 27 stores a BMU having a flat rectangular parallelepiped shape. The BMU 22 has a flat rectangular parallelepiped shape having the same height as that of the battery housing 21 and is arranged vertically adjacent to the battery housing at the arrangement end on the lower side. The BMU 22 can be fixed by screwing or the like.

  In the space directly above the BMU 22 (the space adjacent to the upper battery housing arrangement end), a cable connected to an electronic device such as the PCS unit 23 disposed on the rear surface side is provided, or a cut-off switch is provided. A control panel can be provided.

  As shown in FIGS. 1B, 2A, and 3B, on the rear surface side of the housing 1, a PCS internal door (also referred to as a first lid) 12 and a maintenance door (also referred to as a third lid) 13 are provided. Is provided. A heat sink 14 is provided on the outer surface (outer side) of the PCS internal door 12, and a PCS unit 23 is provided on the inner surface (inner side) of the PCS internal door 12. Further, a heat insulating member 25 is provided at a position facing the PCS unit 23 when the PCS internal door 12 is closed. In other words, the heat insulating member 25 is provided at a position facing the PCS unit 23 when the PCS unit 23 is stored in the PCS storage portion which is a storage space. The PCS internal door 12 is provided so as to be able to open and close an opening (also referred to as a PCS side opening or a first opening) provided on a side surface opposite to a side surface on which the opening (front side opening) 20 is provided. Yes.

  As shown in FIG. 3B, the PCS unit is disposed along the inner surface of the PCS internal door 12. By providing the PCS unit along the inner surface of the PCS internal door 12, the heat generated by the PCS unit can be more effectively released from the PCS internal door. The PCS internal door 12 is configured to be openable and closable when attached to the housing with the right end side as an axis in FIG. 3B. The PCS internal door can be supported and fixed to the housing 1 so as to be rotatable about the left and right edges (whichever may be used) as a rotation axis. Therefore, it is easy to replace and inspect the PCS unit.

  A heat sink 14 is provided on the outer surface of the PCS internal door 12 provided on the rear surface, and a PCS unit 23 is provided on the inner surface of the PCS internal door 12 so as to face each other. Therefore, heat generated from the PCS unit 23 can be effectively released to the outside of the housing by the heat sink 14. The heat sink 14 may be provided integrally with the PCS internal door 12. The PCS internal door 12 provided with the PCS unit 23 and the heat sink 14 can be rotated with respect to the main body of the casing, thereby improving the workability at the time of installation, maintenance and inspection of the PCS unit 23 and the heat insulating member 25. it can. A heat insulating member 25 is provided between the PCS unit 23 and the battery accommodating body 21 and the BMU 22 accommodated therein. Thereby, the influence by the heat_generation | fever of the PCS unit 23 with respect to the battery accommodating body 21 and BMU22 can be suppressed. Packing is provided at the contact portion between the back panel and the housing 1, and sufficient airtightness and watertightness are maintained.

  As shown in FIG. 3B, the maintenance door 13 is provided below the PCS internal door 12. The maintenance door 13 is a rotary type, and a fuse switch, a breaker, and the like are arranged inside. The maintenance door 13 protects the inner switch and the like from the external environment, and can be easily opened and closed, so that the workability during maintenance can be improved. Packing is provided at the contact portion between the maintenance door 13 and the housing 1, and sufficient airtightness and watertightness are maintained. Reference numeral 15 denotes a protective member, which is configured to be detachable with a screw or the like.

  As shown in FIG. 2A, the inside of the housing is partitioned by a partition into a right space on the front door 11 side and a left space on the PCS internal door 12 and maintenance door 13 side. In other words, the housing 1 includes a space side in which the PCS storage portion is disposed and a space side in which the battery storage portion is disposed in the side surface direction extending from the opening on the PCS internal door side to the opening 20 on the front door side. It is partitioned by a partition wall. Further, a battery storage unit and a BMU storage unit are arranged in the right space. That is, the inside of the housing is partitioned by the partition wall extending in the vertical direction with respect to the lower surface of the housing, in the PCS storage portion, the battery storage portion, and the BMU storage portion in the lateral width direction of the side surface of the housing. A PCS storage unit for storing the PCS unit 23 provided on the inner surface of the PCS internal door is arranged on the upper side of the left space, and maintenance systems for maintenance and inspection are installed on the lower side of the left space. Yes. Moreover, the heat insulation member 25 is arrange | positioned along the surface by the side of the left space of the partition which divides left space and right space. The partition wall that divides the left space and the right space serves as a wall that forms the back side portion of the battery housing portion in the battery housing insertion direction, and the battery housing portion side of the partition wall is connected to the battery housing body. A connecting member 29 is provided.

  In addition, the vent hole provided with the waterproof breathable membrane in the present embodiment is disposed on a part of the lower surface of the housing. In FIG. 2A, the waterproof ventilation member 30 provided with a waterproof breathable membrane is installed in the vent provided in the lower surface of the housing. FIG. 9 is a schematic partial enlarged view in which the maintenance door 13, the protection member 15, and the side surfaces of the housing are removed and the vicinity of the maintenance door is enlarged in the power storage device of the present embodiment. As shown in FIG. 9, the waterproof ventilation member 30 provided with a waterproof breathable film is installed on the lower surface which is the bottom of the housing. The waterproof ventilation member 30 is attached to a ventilation hole arranged on the lower surface of the housing. In FIG. 9, reference numeral 31 denotes a power plug. Examples of the power plug include a power plug connected to a commercial power source, a power plug connected to a wiring for supplying AC power, and a power plug connected to a generator such as solar power generation or wind power generation. . The power plug of FIG. 9 has a specification in which external wiring is connected from the lower side of the lower surface of the housing.

  As shown in FIGS. 1A and 1B and the like, the housing 1 is installed on a gantry 10 and can be fixed with bolts or the like. By installing the housing 1 on the gantry 10, stability can be improved and falling can be prevented, and flooding due to rainwater pools can also be prevented. Although not shown, a sunshade that covers the upper surface of the housing 1 can be provided to suppress the influence of direct sunlight and rain.

  FIG. 4 is a perspective view of the battery container in a vertically placed state. In the figure, reference numeral 41 denotes a handle, reference numeral 42 denotes a first connector, reference numeral 43 denotes a guide rail projection, reference numeral 44 denotes a recess (support), and reference numeral 45 denotes a second connector.

  As shown in FIG. 4, the external appearance of the battery housing 21 has a flat rectangular parallelepiped shape, and a handle 41 is provided at the end on the front side in the insertion direction to the housing 1. It becomes easy to grasp the handle 41 and insert and remove it from the power storage device. A first connector 42 is provided at an end portion where the handle 41 is provided. Thereby, the cable can be attached to and detached from the first connector 42 in a state where the battery housing 21 is housed in the housing 1. Further, a second connector 45 is provided at an end portion (back side in the insertion direction) opposite to the end portion where the handle 41 of the battery container is provided. Convex portions 43 that fit into the guide rails in the housing 1 are provided at the lower end and the upper end along the insertion direction of the battery housing 21. A recess 44 is provided at the lower end and the upper end of the battery housing 21. Supporting the concave portion with one hand when inserting / removing the battery housing 21 or having the concave portion when carrying it facilitates insertion / removal work and carrying. As shown in FIG. 5, a connection member 29 is provided on the back side (back side in the insertion direction) of the battery housing portion, and the connection member 29 and the second connector form a pair of terminals. When the battery housing 21 is housed in the battery housing, the connection member 29 and the second connector 45 of the battery housing are connected.

  FIG. 6 is a front view of the front side showing a state in which the battery container is housed following the state shown in FIG. 5. Three flat rectangular parallelepiped battery containers are arranged in each of the upper storage space 26a and the lower storage space 26b. Guide rails are provided on the upper surface and the lower surface of the inner wall constituting the battery housing portion, and flat rectangular parallelepiped battery housings are housed along the guide rails. The guide rails are arranged in parallel at a predetermined interval, and the battery housing body is housed in the battery housing portion along the guide rails, thereby connecting the second connector 45 of the battery housing body and the battery housing portion connecting member. 29 is connected. There is a one-to-one correspondence between the upper guide rail and the lower guide rail.

  Each battery housing body includes a plurality of secondary batteries in a flat rectangular parallelepiped case. A plurality of recesses can be provided on the inner surface of each of the two main surfaces of the case, and one battery can be disposed in each of these recesses. For example, four batteries are arranged on one main surface, and four batteries are arranged on the other main surface, so that a battery housing body accommodating a total of eight batteries is obtained. A plurality of batteries in the case can be connected in series. In this case, the handle 41 and the convex portion 43 can be provided by integral molding. In addition, arrangement | positioning, the number of a some battery, and a connection form are not limited above, It can determine suitably according to desired design specifications.

  A film-clad battery can be used as the battery in the battery housing. The film-clad battery includes a battery element in which positive electrodes and negative electrodes are alternately laminated via separators, and the battery element and the electrolyte are enclosed in a container made of an exterior film such as a laminate film. It is desirable to use a battery having a flat rectangular shape because it is accommodated in the case at a high density. As the battery, a lithium ion battery can be suitably used.

  These battery containers are arranged vertically in the casing 1 in parallel as already described with reference to FIGS. 2A, 2B, and 3A. The end provided with the handle 41 is inserted toward the front, and the end provided with the handle faces the opening 20 (or the inner surface of the closed front door 11). In FIG. 3A, a plurality of battery housings are depicted integrally, but each battery housing is independent of each other and can be inserted into and removed from the housing 1 independently. Moreover, the battery accommodating bodies 21 accommodated in the housing 1 are connected in series, and the adjacent battery accommodating bodies are connected via a cable that connects the first connectors 42 to each other. The battery containers at both ends of the series connection are each connected to the BMU 22 via a cable connected to the first connector.

  FIG. 7 is a perspective view illustrating a process of storing the BMU in the BMU storage unit 27 after the battery container cover 24 is closed following the state illustrated in FIG. 6. The BMU is inserted from the opening 20 of the front door 11 and is stored adjacent to the battery container in the space where the battery storage unit is disposed. FIG. 2B corresponds to a front view showing a state where the BMU is stored.

  A reinforcing material may be attached to the outside of the housing 1 as necessary. Moreover, a panel can be covered on the outer side of the housing 1, for example. The panels may be fixed to each other by rivets or welding as necessary, or may be fixed to the housing. The casing 1 and the panel are made of metal, for example, and are made of stainless steel in the present embodiment.

  In the power storage device of the present embodiment, a waterproof air permeable membrane is provided in a vent hole arranged in a part of the housing. The inside of the housing communicates with the outside air through the waterproof breathable membrane. According to the present embodiment, by using a case having airtightness, it is possible to prevent water and dust from entering the case, and a ventilation hole provided with a waterproof breathable membrane in a part of the case It is possible to suppress the organic gas from accumulating in the housing.

  In the power storage device of the present embodiment, it is preferable that the vent hole provided with the waterproof breathable membrane is disposed at the bottom of the housing. As described above, the battery cells in the battery module may contain a volatile solvent having combustibility as a nonaqueous electrolytic solvent. If an unpredictable event such as a natural disaster or fire occurs, there is a possibility that combustible gas may accumulate in the airtight casing. Examples of the volatile nonaqueous electrolytic solvent having flammability include carbonate solvents such as cyclic carbonates such as diethyl carbonate (DEC). The organic gas derived from the nonaqueous electrolytic solvent having flammability is air. Since the specific gravity is heavier, it is thought that it accumulates at the bottom of the housing. Therefore, by disposing the vent at the bottom of the casing, the nonaqueous electrolytic solvent leaking into the casing can be effectively released to the outside.

The waterproof breathable membrane is a membrane that has both waterproof and breathable properties. The material of the waterproof breathable membrane is not particularly limited, and examples thereof include a polytetrafluoroethylene (PTFE) resin porous membrane or a polyolefin resin porous membrane such as polyethylene and polypropylene. As waterproof breathable membranes, for example, Gore-Tex (registered trademark), Temisch (registered trademark), Tetlatex (registered trademark) and the like are commercially available. For example, Gore-Tex (registered trademark) is formed by combining a film obtained by stretching polytetrafluoroethylene, which is a fluororesin, and a polyurethane polymer. The Gore-Tex contains 1.4 billion fine holes per 1 cm ² .

  The thickness of the waterproof breathable membrane is not particularly limited as long as waterproofness and breathability can be secured, but is preferably 50 to 500 μm, and more preferably 80 to 350 μm.

The air permeability of the waterproof breathable membrane measured at a differential pressure of 1 kPa is, for example, 30 to 500 cm ³ / min.

  The waterproofness of the waterproof breathable membrane measured in accordance with the provisions of JIS L 1092 B method (high water pressure method) is preferably 50 kPa or more, more preferably 100 kPa or more, and further preferably 150 kPa or more. .

  The waterproof breathable member is a member that has a waterproof breathable membrane. By installing it in a vent located in the casing, it will exhibit a waterproof function while maintaining breathability, and prevent water from entering or contaminating the casing. It is a member that can. As the waterproof ventilation member, for example, TEMISH (registered trademark) cap seal, TEMISH (registered trademark) Z3-NTF210SE and the like are commercially available from Nitto Denko Corporation. In order to install the waterproof ventilation member, the shape of the ventilation hole can be appropriately selected or processed.

  In FIG. 2A and FIG. 9, the waterproof ventilation member is installed in the lower part of the PCS storage part in the lower surface of the housing. However, the present invention is not limited to this. It can also be installed in the lower part of. In this case, it is preferable to provide a space for installing the waterproof ventilation member between the battery housing portion and the lower surface of the housing. Further, a plurality of waterproof ventilation members may be provided.

  The total area of the waterproof breathable membrane can be appropriately selected in consideration of the breathability in the housing.

  In the power storage device of the present embodiment, a heat insulating member is disposed between the PCS unit 23 installed on the inner surface of the PCS internal door and the battery storage unit 26. As shown in FIG. 8, the heat insulating member 25 is provided at a position facing the PCS unit 23 when the PCS internal door 12 is closed. Moreover, the heat insulation member 25 is arrange | positioned on the partition which divides a battery accommodating part and a PCS accommodating part. Wiring or the like may be provided on the PCS storage portion side of the partition wall that divides the battery storage portion and the PCS storage portion. In that case, a heat insulating member is disposed along the partition wall including the wiring. Therefore, the heat insulating member preferably has an insulating property. In the power storage device of the present embodiment, the PCS unit 23 is provided on the inner surface of the PCS internal door 12 provided on the side surface of the housing, so that the heat generated in the PCS unit 23 is effectively transmitted from the PCS internal door 12. To the outside of the housing. In addition, heat transfer to the battery housing 21 can be suppressed by providing a heat insulating member between the battery housing and the PCS unit.

  Further, in the power storage device of the present embodiment, it is preferable that the heat insulating member is arranged by providing a space 30 between the PCS unit 23 and the heat insulating member 25 as shown in FIG. 2A. By providing the space 30 between the PCS unit 23 and the heat insulating member 25, the heat released into the space 30 is transferred upward by convection, and the heat transferred upward is in contact with the casing and is externally connected from the casing. Is released. Therefore, heat transfer to the battery housing body generated in the PCS unit can be remarkably suppressed. Moreover, it is preferable that the PCS internal door 12 is provided in the upper part of the side surface of the housing. By providing the PCS internal door in the upper part of the side surface of the casing, the PCS unit can be provided in the upper side of the casing. As a result, the PCS unit can be brought close to the upper surface of the housing, and thus heat generated in the PCS unit can be effectively released from the upper surface of the housing to the outside. In FIG. 2A, the PCS internal door 12 has the upper end of the door 12 installed at a height equivalent to the upper surface of the housing. In other words, the PCS storage unit is provided so as to reach the upper end of the side surface of the housing.

  The shape of the heat insulating member is, for example, a plate shape. The heat insulating member is preferably formed to be removable from the housing from the viewpoint of inspection, maintenance, and the like. Moreover, it is preferable that a heat insulation member is comprised with the heat insulation material which has elasticity, and it is engage | inserted and arrange | positioned with respect to the inner wall of a PCS accommodating part using this elasticity. Thereby, while being able to attach or detach a heat insulation member in a housing | casing, the clearance gap between a heat insulation member and a housing | casing can be reduced, and the heat transfer to a battery container can be suppressed more effectively. The heat insulating member having elasticity can be arranged at a predetermined position so as to be pushed into the housing. The shape of the heat insulating member can be appropriately selected according to the shape and size in the housing. For example, as shown in FIG. 8, the width of the heat insulating member having elasticity can be made substantially equal to or slightly larger than the lateral width of the rear surface portion of the housing. In addition, the heat insulating member may be provided in the housing by providing a fixing member on the heat insulating member itself or the housing and the like.

  As the heat insulating material having elasticity, for example, foamed urethane, foamed polyimide, foamed polypropylene, or the like can be used, but is not particularly limited thereto.

  In the power storage device of the present embodiment, a PCS unit that is a heat source and a battery container are provided by providing an opening (front side opening) for taking out the battery container on the side surface that faces the side surface on which the PCS internal door is provided. And the space 30 between the PCS unit 23 and the heat insulating member 25 can be widened. If this space 30 is widened, heat convection easily occurs, and the amount of heat released from the housing can be increased. Moreover, by making the internal shape of the casing into a flat rectangular parallelepiped shape and the battery housing body into a flat rectangular parallelepiped shape, the area where the PCS unit and the battery housing body face each other can be reduced, and from the PCS unit to the battery housing body. The amount of heat transferred can be minimized. Furthermore, by providing the opening of the battery storage portion over the vertical direction of the side surface on the front door 11 side, the storage space of the battery storage body can be expanded. At this time, heat generated in the PCS unit is easily transferred to the battery housing due to an increase in the storage space of the battery housing, but the battery housing facing the PCS unit is formed by making the casing or the battery housing into a flat rectangular parallelepiped shape. The area of the part can be reduced. In addition, since the present embodiment has a configuration capable of effectively releasing heat to the outside as described above, the power storage device of the present embodiment is easy to downsize, replace and inspect the entire power storage device. , Release of heat to the outside, and suppression of heat transfer to the battery housing can be achieved at the same time.

  In the power storage device of the present embodiment, a space (not shown, upper space) communicated with the space 30 between the PCS unit 23 and the heat insulating member 25 between the wall constituting the upper portion of the battery housing and the upper surface of the housing. It is also possible to have a configuration in which the same is also provided. Since heat has a property of moving upward by convection, by providing a space communicating with the space 30 in the upper space of the housing, heat can be released from the space 30 to the upper space. Since it is in contact with the upper surface of the body, heat can be effectively released from the upper surface of the housing. In that case, it is preferable that the heat insulation member 25 is arrange | positioned also on the wall which comprises the upper part of a battery accommodating part. In addition to the heat insulating member (also referred to as a first heat insulating member) 25 arranged on the wall facing the PCS unit among the walls constituting the battery housing part, the heat insulation is also provided on the wall constituting the upper part of the battery housing part. By disposing a member (also referred to as a second heat insulating member), heat transfer to the battery housing can be further suppressed. Even if the 2nd heat insulation member is arrange | positioned so that attachment or detachment is possible on the wall which comprises a battery accommodating part, it may be fixed and arrange | positioned. You may integrally form the 2nd heat insulation member arrange | positioned on a battery accommodating part, and the 1st heat insulation member 25 arrange | positioned in the position facing a PCS unit.

  The power storage device of the present embodiment has a configuration in which a radiation fin (also referred to as a first radiation fin) is installed in the housing portion above the space 30 between the PCS unit and the heat insulating member. Can do. In other words, the heat radiation fin can be provided in a portion immediately above the PCS storage portion on the upper surface of the housing. Since the heat released from the PCS unit to the space 30 is likely to move upward by convection and accumulate on the upper side of the space 30, it is possible to effectively release the heat to the outside by installing a radiation fin in this portion. . The heat dissipating fins may be provided on at least one of the inside and the outside of the housing, and are preferably provided on both sides from the viewpoint of heat release. In addition, a heat radiating fin (also referred to as a second heat radiating fin) can be provided in a portion directly above the battery housing portion on the upper surface of the housing. By providing the radiation fins over the upper surface of the casing, the heat in the casing can be effectively released to the outside. In particular, as described above, when the upper space communicating with the space 30 is provided on the battery housing portion, the heat generated in the PCS unit to the battery housing body is generated by the first heat insulating member and the second heat insulating member. It can be suppressed by a heat insulating member. Further, the heat released from the PCS unit to the space 30 is transferred upward by convection, and is effective by the first and second radiating fins provided on the upper surface of the housing above the space 30 and the upper space. To the outside of the housing. Therefore, the power storage device of the present embodiment can remarkably suppress electric heat to the battery.

  The power storage device of this embodiment can have a configuration in which the casing has hermeticity. Since the performance of the film-clad battery accommodated in the housing 1 varies depending on the ambient temperature, it is desirable to maintain the temperature in the housing 1 within a predetermined temperature range. In this case, if the internal space of the housing 1 is communicated with the outside air, the temperature rise of the internal space can be suppressed. However, if an opening or a through hole for communicating the internal space of the housing 1 with the outside air is provided, there is a concern that rainwater or dust may enter. Therefore, the casing is preferably sealed when the opening is closed by the lid, and has a structure that ensures airtightness and watertightness. In other words, no opening or through hole for communicating the internal space of the housing 1 with the outside air is provided. The power storage device of the present embodiment can suppress the transfer of heat to the battery housing and can effectively release the heat to the outside. Therefore, even if the internal space of the housing 1 is not communicated with the outside air, Accumulation in the container can be sufficiently suppressed.

  The power storage system of the present embodiment includes the power storage device of the present embodiment and also includes a control system unit (system controller). This power storage system is preferably connected between a commercial power source supplied to a general household and a load such as a home appliance, and supplies surplus power to the commercial power source as backup power or auxiliary power in the event of a power failure. It is used to do. In addition, when household distributed power supplies, such as a solar cell system and a micro wind power generator, are provided in each household, these household distributed power supplies are also connected to an electrical storage system.

DESCRIPTION OF SYMBOLS 1 Case 10 Base 11 Front door (2nd cover body)
12 PCS internal door (first lid)
13 Maintenance door (third lid)
14 Heat sink 20 Opening 21 Battery container 22 BMU
DESCRIPTION OF SYMBOLS 23 PCS unit 24 Battery housing cover 25 Thermal insulation member 26 Battery storage part 26a Upper side storage space 26b Lower side storage space 27 BMU storage part 28 Control panel 29 Connection member 30 Waterproof ventilation member 31 Power plug 41 Handle 42 First connector 43 Convex part for guide rail 44 Concave part (support part)
45 Second connector

Claims (19)

A power storage device comprising: a battery housing; a power conditioner; and a housing that houses the battery housing and the power conditioner;
The housing has a sealing property,
A power storage device in which a ventilation hole provided with a waterproof breathable membrane is provided in the casing, and the inside of the casing communicates with outside air through the waterproof breathable membrane.   The power storage device according to claim 1, wherein the vent is disposed at a bottom portion of the housing.   The power storage device according to claim 1, wherein the waterproof breathable membrane is a gas permeable membrane that allows organic gas to pass therethrough. The battery container includes a battery cell containing a non-aqueous electrolyte solvent,
The power storage device according to claim 3, wherein the organic gas is a gas derived from the non-aqueous electrolyte solvent. The housing is
A first opening provided in the first side surface;
A first lid capable of opening and closing the first opening;
A PCS storage section for storing the inverter;
A battery storage portion for storing the battery storage body,
The power storage device according to any one of claims 1 to 4, wherein the power conditioner is provided on an inner surface of the first lid.   The power storage device according to claim 5, wherein the vent hole is provided in a lower portion of the PCS storage portion at a bottom portion of the housing.   The power storage device according to claim 5, wherein a heat insulating member is provided between the power conditioner and the battery storage unit.   The power storage device according to claim 7, wherein the heat insulating member is disposed with a space between the power conditioner.   The power storage device according to claim 5, wherein a heat radiating member is provided at a position facing the power conditioner on the outer surface of the first lid.   The power storage device according to any one of claims 5 to 9, wherein the casing includes a partition wall that partitions the PCS storage unit and the battery storage unit.   The power storage device according to claim 5, wherein the PCS storage portion is provided to reach an upper end portion of the first side surface. The housing is
A second opening provided on a second side surface opposite to the first side surface for inserting and removing the battery housing;
A second lid capable of opening and closing the second opening;
The electrical storage apparatus as described in any one of Claims 5 thru | or 11 which has these. A plurality of the battery containers are provided,
The battery container has a flat rectangular parallelepiped shape,
The power storage device according to claim 12, wherein the battery housing bodies are arranged in parallel so as to face the second opening.   The power storage device according to any one of claims 1 to 13, wherein the casing further accommodates a battery management unit.   The power storage device according to claim 14, wherein the battery management unit is disposed adjacent to the battery container.   The power storage device according to claim 1, wherein the housing has a rectangular parallelepiped shape.   The power storage device according to any one of claims 1 to 16, wherein the battery housing body houses a film-clad battery.   The power storage device according to any one of claims 1 to 17, wherein the battery container houses a lithium ion secondary battery.   A power storage system comprising the power storage device according to any one of claims 1 to 18 and a control system unit that controls the power storage device.

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