JP5881140B2 - Power storage device - Google Patents

Description

  The present invention relates to a power storage device including a plurality of secondary batteries.

  The power storage device includes a plurality of secondary batteries, and discharges electricity charged in the secondary batteries as necessary. For example, electricity charged in the middle of the night when the electricity rate is low is discharged in the daytime, or electricity charged in the daytime by solar power generation is discharged in the nighttime. It also discharges the electricity that had been charged up to that time.

  Conventionally, power storage devices such as those described above have often been installed in factories, offices, and the like, but in recent years, they have also been installed in ordinary houses.

  Currently, a film-clad battery is generally used as a secondary battery provided in a power storage device. A film-clad battery has a battery element in which a positive electrode plate and a negative electrode plate are alternately laminated via a separator, and this battery element is enclosed in an outer film such as a laminate film together with an electrolytic solution.

  Patent Document 1 describes a power storage device including a lithium ion battery which is one of film-clad batteries. The power storage device described in Patent Document 1 includes a rectangular parallelepiped casing made of a metal plate, and an internal space of the casing is partitioned into a left space and a right space by a wall. In the right space, a lithium ion battery in which a plurality of cells are packed together and a charging unit for the lithium ion battery are arranged. On the other hand, an AC power supply control unit that supplies AC power from the lithium ion battery is disposed in the left space through a heat dissipation space between the wall that forms the left space.

  Further, a fan is provided above the left space, and the air in the left space is agitated by the fan. Further, Patent Document 1 suggests that a ventilation part is formed in the casing in order to suppress a temperature rise in the casing, and a slit with a lid is cited as an example of the ventilation part.

JP 2010-182541 A (paragraphs 0013, 0014, 0016, 0020)

  In the power storage device described in Patent Document 1, the air in the left space where the AC power supply control unit is arranged is agitated by a fan. However, this left-side space and the right-side space where the lithium ion battery is disposed are partitioned by a wall, and air circulation is blocked. That is, in the power storage device described in Patent Document 1, cooling of the lithium ion battery is not considered. However, since characteristics of the lithium ion battery and other secondary batteries change depending on the ambient temperature, it is desirable to maintain the ambient temperature within a predetermined temperature range.

  In this regard, when the ventilation portion is formed in the casing in accordance with the suggestion of Patent Document 1, there is a concern that rainwater or dust may enter from the ventilation portion. In order to reliably prevent rainwater and dust from entering from the ventilation portion, it is necessary to provide a filter or the like in the ventilation portion.

  An object of the present invention is to solve at least one of the above problems.

The power storage device of the present invention is a power storage device including a plurality of secondary batteries, and a housing having an internal space that is not in communication with the outside air, and the plurality of second batteries housed in the internal space of the housing. A first battery and a first fan disposed vertically above the internal space with the plurality of secondary batteries interposed therebetween, and forming an airflow circulating around the plurality of secondary batteries in the internal space; and Two fans, a heat radiating member that radiates heat in the internal space to the outside air, a partition that partitions the internal space of the housing and forms a first space and a second space in the internal space And at least two openings that are provided in the partition wall and communicate with the first space and the second space, and the plurality of secondary batteries are disposed in the first space, The heat dissipating member is disposed in the second space. To.

  According to the present invention, at least one of the above problems is solved.

It is an external appearance perspective view of a housing. It is a disassembled perspective view of a housing. It is a disassembled perspective view of a lid | cover. It is a perspective view of an internal housing. It is a front view which shows the inside of a housing. It is a perspective view which shows the accommodation state of a PCS unit. It is a perspective view which shows the accommodation state of BMU. It is a perspective view which shows an upper board. It is a perspective view which shows a lower board. It is a perspective view which shows the accommodation state of a battery pack. It is a disassembled perspective view of a battery pack. It is a perspective view which shows the accommodation state of a battery pack. It is a partial enlarged front view which shows the accommodation state of a battery pack. It is a perspective view which shows the attachment state of a box. It is a perspective view which shows typically the flow of the air in a housing. It is a perspective view which shows typically the flow of the air in a housing.

  Hereinafter, an example of an embodiment of a power storage device of the present invention will be described with reference to the drawings. The power storage device according to the present embodiment includes at least a metal casing, a plurality of secondary batteries, a battery management unit (BMU), a PCS (Power Conditioner System) unit, and a control system.

  The BMU is interposed between each secondary battery, the PCS unit, and the control system, collects information on the state of each secondary battery, and determines the state of each secondary battery based on the collected information. Further, the BMU outputs information indicating the state of each secondary battery to the PCS unit and the control system based on the determination result. The PCS unit converts an AC voltage supplied from an external power supply (commercial power supply or solar battery) into a DC voltage and outputs it to each secondary battery, and converts the DC voltage supplied from each secondary battery into an AC voltage. Convert and output to the outside (load). The control system mainly includes an arithmetic processing unit, a memory, and a program stored in the memory, and comprehensively controls the power storage device. The control system, for example, manages and controls information transmission between the BMU and the PCS unit according to the above program, manages and controls the charge amount and discharge amount of the secondary battery, and operates the power storage device (charge mode, Switch the discharge mode). In the power storage device according to the present embodiment, a control system is configured by a notebook PC (Personal Computer), a memory built in the PC, a program stored in the memory, and the like. The above description describes the main functions of the BMU, PCS unit, and control system, and the BMU, PCS unit, and control system also have functions other than the above functions.

  FIG. 1 is an external perspective view of a housing 1, (a) is a front perspective view, and (b) is a rear perspective view. FIG. 2 is an exploded perspective view of the housing 1. As shown in these drawings, the housing 1 is a box mainly composed of an internal housing 2 and an exterior panel covering the internal housing 2, and has a substantially rectangular parallelepiped appearance as a whole. The inner casing 2 and the exterior panel are made of metal, and are made of stainless steel in this embodiment. The size of the housing 1 is not particularly limited, but the size of the housing 1 in this embodiment is a width (W) 450 mm, a depth (D) 760 mm, and a height (H) 880 mm (see FIG. 1A). ).

  As shown in FIG. 2, the internal housing 2 includes a base (bottom) 10 having a substantially rectangular shape in plan view, a right side surface 11 and a left side surface 12 rising from two long sides of the base 10, and one short side of the base 10. 4 has a back surface 13 (FIG. 4) rising from the base 10 and a ceiling surface 14 facing the base 10, and a surface (front surface) facing the back surface 13 is open. A reinforcing material is attached to the outside of each surface of the internal housing 2 as necessary.

  Side panels 21 and 22 are respectively placed on the left and right side surfaces 11 and 12 of the internal housing 2. Further, a back panel 23 is covered on the back surface 13 of the internal housing 2, and a ceiling panel 24 is covered on the ceiling surface 14. Further, a front panel 25 is provided on the front surface of the internal housing 2. Each panel is fixed to each other by rivets or welding as required, or fixed to the inner casing 2. However, only the front panel 25 is rotatably attached to the front surface of the internal housing 2. That is, the front panel 25 constitutes a lid 31 that opens and closes the opening 30 of the housing 1. Further, a heat radiating member, which will be described later, is disposed between the back surface 13 (FIG. 4) of the internal housing 2 and the back panel 23. Has been.

  FIG. 3 is an exploded view showing the lid 31 of the housing 1 mainly composed of the front panel 25. The lid 31 includes a front panel 25 and a frame panel 26 that is fitted inside the front panel 25. Hooks 32 are provided on both sides of the lower end of the lid 31, and lock mechanisms 33 are provided on both sides of the upper end. The lid 31 can be rotated in the direction of the arrow in FIG. 2 with the shaft as a rotation axis by engaging each hook 32 with a shaft (not shown) provided at the lower edge of the housing opening 30. Is attached to the housing 1. The lock mechanism 33 in the present embodiment is a so-called snap lock, and a snap lock receiving portion 33 a is provided on both upper ends of the lid 31. On the other hand, a snap lock arm and lever (not shown) are provided on the upper edge of the housing opening 30. The snap lock is locked by rotating the lever in a predetermined direction while the arm is hooked on the receiving portion 33a, and unlocked by rotating the lever in the reverse direction. However, the lock mechanism 33 is not limited to a snap lock, and any lock mechanism can be adopted.

  As shown in FIGS. 4 (a) and 4 (b), the back surface 13 of the internal housing 2 is provided with openings (upper opening 13 a and lower opening 13 b) at the top and bottom thereof. Further, a flange 13c having a height of about 40 mm is provided on the edge of the back surface 13. The heat radiating member 40 is accommodated inside the flange 13c, and the back panel 23 (FIG. 2) is covered from above. In other words, the heat radiating member 40 is disposed in a space 27 provided between the back surface 13 of the internal housing 2 and the back panel 23. In other words, the internal space of the housing 1 is divided into an inner space of the internal housing 2 and a space 27 by a partition wall (the back surface 13 of the internal housing 2). The two openings 13a and 13b communicate with each other.

  Here, the heat radiating member 40 includes a heat absorbing surface 41 and a heat radiating surface 42 on which a large number of fins are formed, and the heat absorbing surface 41 is arranged in a direction facing the back surface 13. Moreover, the outer peripheral surface of the heat radiating member 40 is in close contact with the inner peripheral surface of the flange 13c. Further, a rubber packing 41 is provided between the end face of the flange 13c and the back panel 23 to ensure predetermined airtightness and watertightness.

  FIG. 5 is a front view of the housing 1 with the lid 31 removed. The internal space of the housing 1, more precisely the inner space of the internal housing 2, is partitioned into three spaces along the vertical direction, the PCS unit 50 is accommodated in the upper stage, and the BMU 60 and a plurality of (this embodiment) 13 battery packs 70 are accommodated, and a terminal block (not shown) is accommodated in the lower stage. Hereinafter, the internal structure of the housing 1, that is, the internal structure of the power storage device according to the present embodiment will be specifically described with reference to FIGS. 6 to 13.

  As shown in FIG. 6A, the internal space of the housing 1 is divided into three spaces by a pair of plate-like members (an upper plate 80 and a lower plate 90). Specifically, the space (first space) between the upper plate 80 and the ceiling surface 14 of the inner casing 2, the space between the upper plate 80 and the lower plate 90 (second space), and the lower plate 90 and the base 10. It is partitioned into a space (third space) between them.

  The PCS unit 50 is accommodated in the first space while being fixed to the chassis 51. When the PCS unit 50 is accommodated in the first space, the chassis 51 to which the PCS unit 50 is fixed is slid along the upper surface of the upper plate 80 as shown in FIG. Insert into. At this time, as shown in FIG. 6B, the insertion operation is temporarily suspended before the PSC unit 50 is completely inserted into the first space, and necessary cables are connected to the PCS unit 50. Thereafter, the PSC unit 50 is completely inserted into the first space, and the chassis 51 is fixed to the upper plate 80 with screws.

  As shown in FIG. 7A, the BMU 60 is accommodated in the second space. Here, the structures of the upper plate 80 and the lower plate 90 will be described in advance with reference to FIGS. 8A and 8B are perspective views of the upper plate 80, wherein FIG. 8A is a perspective view of the upper surface side, FIG. 8B is a perspective view of the lower surface side, and FIG. 8C is an exploded perspective view. 9 is a perspective view of the lower plate 90, (a) is a perspective view of the upper surface side, (b) is a perspective view of the lower surface side, and (c) is an exploded perspective view.

  As shown most clearly in FIG. 8 (c), the upper plate 80 includes a base plate 81, a pair of brackets 82 provided on the upper surface of the base plate 81, and a plurality of pieces provided on the lower surface of the base plate 81. The support member 83 includes a plurality of rail members 84 that are stretched over the support member 83. One end in the longitudinal direction of the bracket 82 is bent upward, and a screw hole (not shown) is formed at the bent end. A screw for fixing the chassis 51 (FIG. 6) on which the PCS unit 50 is mounted to the upper plate 80 is screwed into the screw hole. On the other hand, a plurality of support members 83 are arranged in parallel at a predetermined interval on the lower surface of the base plate 81. Further, on the support member 83, a plurality of rail members 84 are arranged in parallel at regular intervals along the longitudinal direction of the support member 83. Each rail member 84 has a substantially U-shaped cross-sectional shape, and a guide groove 85 is formed between the side walls of adjacent rail members 84. That is, 13 guide grooves 85 are provided in parallel on the lower surface of the upper plate 80 facing the upper surface of the lower plate 90.

  As shown most clearly in FIG. 9 (c), the lower plate 90 includes a base plate 91, a pair of brackets 92 provided on the lower surface of the base plate 91, and a plurality of pieces passed between the pair of brackets 92. And a plurality of rail members 94 provided on the upper surface of the base plate 81. The plurality of support members 93 are arranged in parallel at predetermined intervals along the longitudinal direction of the brackets 92 between the opposing brackets 92. On the other hand, the plurality of rail members 94 are arranged in parallel at regular intervals along the longitudinal direction of the support member 93 on the upper surface of the base plate 91. Each rail member 94 has a substantially U-shaped cross-sectional shape, and a guide groove 95 is formed between the side walls of adjacent rail members 94. That is, 13 guide grooves 95 are provided in parallel on the upper surface of the lower plate 90 facing the lower surface of the upper plate 80. The guide grooves 85 provided in the upper plate 80 and the guide grooves 95 provided in the lower plate 90 correspond one to one. The end portions of the side walls of the rail members 84 and 94 are bent inward. As a result, the width of the ends (entrance / exit) of each guide groove 85, 95 is slightly wider than the width of the other portions.

  Refer to FIG. 7 again. The BMU 60 is inserted into the second space along the left side surface 12 of the internal housing 2. The BMU 60 inserted into the second space is fixed to the end surfaces of the upper plate 80 and the lower plate 90 with screws (not shown).

  As shown in FIGS. 5 and 10, a plurality of secondary batteries (a plurality of battery packs 70 in the present embodiment) are accommodated in the second space and next to the BMU 60. In other words, a plurality of battery packs 70 are accommodated between the BMU 60 and the right side surface 11 of the internal housing 2. As shown in FIG. 11, each battery pack 70 has a substantially plate-like module case 71, and a film-covered battery (inside the recesses formed on the two main surfaces (A surface and B surface) of the module case 71. Lithium ion battery) 72 is arranged. More specifically, two concave portions are formed on each main surface of the module case 71, and one film-clad battery 72 is disposed in each concave portion. In FIG. 11, only two film-clad batteries 72 arranged on one main surface (A surface) of the module case 71 are illustrated, but on the other main surface (B surface) of the module case 71. Two film-clad batteries are also arranged in the same manner. In short, each battery pack 70 includes four film-clad batteries 72, and these four film-clad batteries 72 are connected in series via connection members (bus bars) provided in the case 71. But the secondary battery used for the electrical storage apparatus of this invention is not limited to the said battery pack.

  As shown in FIG. 11, on the two film-clad batteries 72 arranged on the respective main surfaces of the module case 71, an insulation having a size capable of covering the film-clad batteries 72 collectively. A sheet 73 is covered, and a cover 74 is covered on the insulating sheet 73. A handle 75 is integrally formed on the end surface of the module case 71.

  Refer to FIG. 10 again. In the power storage device according to the present embodiment, a plurality of battery packs 70 are arranged in parallel in the vertical direction. In other words, a plurality of battery packs 70 are arranged in parallel in the second space so that the A and B surfaces of adjacent battery packs 70 (module case 71) face each other. In other words, the battery packs 70 are arranged in parallel in the internal casing 2 in such a direction that the main surface thereof is parallel to the side surfaces 11 and 12 (FIG. 2) of the internal casing 2. And as for each battery pack 70 arranged in parallel as mentioned above, the end surface in which the handle 75 is provided has opposed the opening surface of the housing opening part 30. FIG. That is, the handle 75 is exposed at the housing opening 30. By arranging the plurality of battery packs 70 in parallel in the vertical direction as described above, it is possible to avoid the weight of the other battery pack 70 from acting on each battery pack 70.

  The upper end (upper edge) of each battery pack 70 arranged in parallel as described above is inserted into the guide groove 85 over its entire length, and the lower end (lower edge) is inserted into the guide groove 95 over its entire length. Has been. In short, a slot in which each battery pack 70 can be inserted and removed is provided in the housing 1. Here, the widths of the end portions (entrances / exits) of the guide grooves 85 and 95 are slightly wider than the widths of the other portions. Therefore, the end portion of each battery pack 70 can be easily inserted into the guide grooves 85 and 95 from the end portions of the guide grooves 85 and 95. In FIG. 10, a plurality of battery packs 70 are shown integrally, but the battery packs 70 are independent of each other and can be inserted into and removed from the housing 1 independently.

  As shown in FIGS. 12A and 12B, the plurality of battery packs 70 accommodated in the housing 1 are fixed to the housing 1 together by a pair of fixing members 101 and 102. Specifically, the upper fixing member 101 straddling between the upper end surface of the battery pack 70 and the end surface of the upper plate 80 adjacent thereto is screwed to the end surface of the upper plate 80. A lower fixing member 102 straddling between the lower end surface of the battery pack 70 and the end surface of the lower plate 90 adjacent thereto is screwed to the end surface of the lower plate 90. Each of the battery packs 70 is fixed in the front-rear direction (in the insertion / removal direction to the housing 1) by these two fixing members 101, 102. It is obvious that each battery pack 70 is fixed in the left-right direction by the side walls of the rail members 84, 94 forming the guide grooves 85, 95.

  As shown in FIG. 13, the plurality of battery packs 70 accommodated in the housing 1 are connected in series via a power cable 111 that connects connectors 110 provided on the end faces of the battery packs 70. At the same time, it is connected to the BMU 60 via the power cable. As described above, each battery pack 70 contains four film-clad batteries 72 connected in series. Therefore, the power storage device according to the present embodiment includes 52 (4 × 13) film-clad batteries 72 connected in series and has a maximum capacity of 6 kwh.

  As shown in FIG. 13, a connector 112 different from the connector 110 is provided on the end face of each battery pack 70. The connectors 112 of the six battery packs 70 are connected to the connectors 114 of the BMU 60 via the signal cables 113, respectively, and the connectors 112 of the remaining seven battery packs 70 are connected to the connectors 115 of the BMU 60 via the signal cables 113, respectively. Has been. These connectors and cables are for sensing the state of each battery pack 70, and information indicating the state of each battery pack 70 is input to the BMU 60 via these connectors and cables.

  As shown in FIG. 14, a box 120 is attached to the outside of the back panel 23, and a notebook PC constituting a control system is accommodated in the box 120. Specifically, a pair of brackets 121 are screwed to the outer surface of the back panel 23, and the box 120 is screwed to the brackets 121. In addition to the role of fixing the box 120 to the back panel 23, the bracket 121 has a gap between the back panel 23 and the box 120 so that the slit 23 a formed in the back panel 23 is not blocked by the box 120. It also has a role to form.

  As shown in FIG. 14A, the back surface of the base 10 is provided with a drawing hole for drawing the cable and a drawing hole for drawing the cable. The cable drawn from the drawing hole is connected to a predetermined terminal provided on the terminal block. In addition, a cable connected to a predetermined terminal provided on the terminal block is drawn out from the lead hole.

  Next, the cooling structure of the power storage device according to this embodiment will be described. As described above, it is desirable to maintain the temperature in the casing 1 within the predetermined temperature range. In this case, if an opening or a through hole is provided in the housing 1, an effect of suppressing the temperature rise in the internal space can be expected, but it is also feared that rainwater or dust may enter. Therefore, the casing 1 constituting the power storage device according to the present embodiment is sealed when the opening 30 is closed by the lid 31 and has a structure that ensures predetermined airtightness and watertightness. In other words, an opening or a through hole for communicating the internal space of the housing 1 with the outside air is not provided. In addition, the slit 23a (FIG. 1, FIG. 2) provided in the back panel 23 is connected to the space 27 in which the heat radiating member 40 is arrange | positioned. As shown in FIG. 4, openings 13 a and 13 b are provided on the back surface 13 of the internal housing 2 forming the space 27. However, the heat dissipating member 40 is disposed on the back surface 13 and the outer peripheral surface of the heat dissipating member 40 is in close contact with the inner peripheral surface of the flange 13c. A packing 41 is disposed between the end face of the flange 13c and the back panel 23. That is, the internal space of the housing 1 communicates with the heat dissipation member 40 but does not communicate with the outside air. More specifically, the heat absorbing surface 41 (FIG. 4A) of the heat radiating member 40 communicates with the internal space of the housing 1 through the openings 13a and 13b, and the heat radiating surface 42 (FIG. 4B) is The air communicates with the outside air through the slit 23a. With this structure, the heat in the housing 1 can be dissipated to the outside without allowing the internal space of the housing 1 to communicate with the outside air.

  Further, an air flow as schematically shown by using arrows in FIGS. 15 and 16 is formed in the housing 1, and heat dissipation through the heat dissipation member 40 is promoted. This will be specifically described below.

  FIG. 15 is a perspective view of the right side surface of the power storage device according to the present embodiment, and FIG. 16 is a perspective view of the front surface. As shown in FIG. 15, a suction port (not shown) and an exhaust port 52 are provided in the case of the PCS unit 50, and a cooling fan (not shown) is built in the case. Therefore, when the fan rotates, air is introduced from the intake port, and the introduced air is exhausted from the exhaust port 52. Here, as shown in FIG. 15, the first space of the housing 1 in which the PCS unit 50 is accommodated communicates with the space 27 in which the heat dissipation member 40 is accommodated via the upper opening 13a. The third space of the housing 1 in which the terminal block is accommodated communicates with the space 27 through the lower opening 13b. Further, as shown in FIG. 16, two fans 130 are provided in the third space of the casing 1 and in the vicinity of the lower opening 13b. That is, the upper and lower portions of the internal space of the housing 1 communicate with the space 27, and fans are provided at the upper and lower portions, respectively. Therefore, when two fans (the fan built in the PCS unit 50 and the fan 130) rotate, an air flow as shown by arrows in FIGS. 15 and 16 is generated in the housing 1 by the principle of push-pull. Specifically, the air blown out from the exhaust port 52 of the PCS unit 50 flows into the space 27 through the upper opening 13a. The air flowing into the space 27 passes through the space 27 and is sucked into the fan 130 through the lower opening 13b. The air blown out from the fan 130 passes below the electric pack 70 and flows out into the space 28 between the end face of the electric pack 70 and the front panel 25 (lid 31). Further, the air flowing into the space 28 passes through the space 28 and is sucked into the intake port of the PCS unit unit 50. That is, an airflow that circulates around the battery pack 70 is formed in the internal space of the housing 1.

  The airflow (air) circulating as described above is cooled by heat exchange with the outside air via the heat dissipation member 40 when passing (falling) through the space 27. The cooled air mainly cools the battery pack 70 through heat exchange with the battery pack 70 in the process of passing (rising) through the space 28. That is, the spaces 27 and 28 form a flow path in the housing 1 for circulating air (cooling air). In other words, the back surface 13 of the internal housing 2 and the heat absorbing surface 41 of the heat dissipation member 40 facing the back surface 13 form a first flow path therebetween. Moreover, the end surface of the battery pack 70 and the inner surface of the housing 1 (the inner surface of the lid 31) facing the end surface form a second flow path therebetween.

  By forming the airflow as described above in the housing 1, the plurality of battery packs 70 can be cooled more uniformly than when the cooling air is directly supplied to the battery pack 70 and locally cooled. .

  In the present embodiment, the fan built in the PCS unit 50 is used to form the air flow. However, in the case where an electronic device containing a fan is housed in addition to the PCS unit 50, A fan built in the electronic device may be used. Furthermore, a fan different from the fan built in the electronic device may be provided and used. Further, the exhaust port 52 of the PCS unit 50 and the upper opening 13a may be connected by a duct. Further, a temperature sensor may be provided, and one or both of the two fans may be controlled based on the detection result of the sensor. For example, a temperature sensor may be provided in the housing, and the operations of the two fans may be controlled based on the internal temperature of the housing 1 detected by the sensor. Further, a temperature sensor may be provided outside the housing, and the operations of the two sensors may be controlled based on the environmental temperature detected by the sensor.

1 Housing 2 Internal Housing 27 Space 28 Space 30 Opening 50 PCS Unit 60 BMU
70 battery pack 72 film outer battery 80 upper plate 84 rail member 85 guide groove 90 lower plate 94 rail member 95 guide groove

Claims (8)

A power storage device including a plurality of secondary batteries,
A housing with an internal space that is not in communication with the outside air ;
A plurality of secondary batteries housed in the internal space of the housing;
A first fan and a second fan, which are arranged vertically above and below the internal space with the plurality of secondary batteries in between, and form an airflow circulating around the plurality of secondary batteries in the internal space; ,
A heat dissipating member that dissipates heat in the internal space to the outside air;
A partition that partitions the internal space of the housing and forms a first space and a second space in the internal space;
Provided in the partition wall, and having at least two openings for communicating the first space and the second space;
The power storage device, wherein the plurality of secondary batteries are disposed in the first space, and the heat dissipation member is disposed in the second space.   The power storage device according to claim 1, wherein the internal space is a sealed space. A first flow path that constitutes a part of the circulation path of the airflow is formed between the partition and the heat absorbing surface of the heat dissipation member facing the partition,
A second part constituting another part of the circulation path between an end face of each secondary battery opposite to an end face facing the partition and an inner face of the casing facing the end face power storage device of claim 1, wherein the flow path is formed thereon. Any the one of the first fan and said second fan, of claims 1 to 3, characterized in that said a fan incorporated in the electronic equipment housed in the inner space The power storage device according to claim 1. The power storage device according to claim 4 , wherein the electronic device is a PCS unit. The power storage device according to claim 5 , wherein the PCS unit is provided in the first space and above the plurality of secondary batteries. Has an exterior panel covering the heat radiating surface of the heat radiating member, said exterior panel of claim 1 through claim 6, characterized in that openings for communicating the heat absorbing surface of the heat dissipation member to the outside air is formed The electrical storage apparatus as described in any one. The power storage device according to any one of claims 1 to 7 , wherein the secondary battery is a battery pack in which a plurality of film-clad batteries are accommodated.