JP6260625B2 - Power storage device - Google Patents

Description

  The present invention relates to a power storage device in which a large number of battery packs are accommodated in a storage battery panel.

  In factories and office buildings, power is backed up when power usage reaches its peak, and when battery usage is low, battery packs equipped with battery cells such as lithium ion secondary batteries and lithium ion capacitors are charged. A power storage device is provided. When backing up electric power in a factory or office building, the power storage device is arranged in a power supply room provided in a building such as a factory. If the container equipped with the power storage device is arranged adjacent to the factory building, the power can be backed up at the peak of power use in the production facilities of the factory.

  When the power storage device is mounted on the container, the container can be transported by land using a trailer or can be transported by sea using a ship, and power can be backed up against a power load when a power failure occurs.

  A battery unit panel for configuring the power storage device is described in Patent Document 1. In this battery unit panel, a plurality of battery unit cases are provided in a casing, and battery units, that is, battery packs are accommodated in the battery unit cases, respectively. The front wall of the battery unit case is provided with a case air inlet, and the rear wall of the battery unit case is provided with a case air outlet, and each electric unit case is horizontally oriented from the case air inlet to the case air outlet. The cooling air is guided in the direction. The casing is provided with a partition plate, and an exhaust chamber is provided on the back side of the partition plate. In order to connect each case exhaust port to the exhaust chamber, an opening is provided in the partition plate, and the cooling air discharged from the case exhaust port is guided to the exhaust chamber through the opening. .

JP 2013-196908 A

  As described in Patent Document 1, when the battery unit is accommodated in the battery unit case and a ventilation passage through which cooling air flows is formed between the battery unit and the battery unit case, the battery unit case Since the size of the battery unit including the battery is increased and the exhaust chamber is installed, the number of battery units, that is, battery packs that can be accommodated in one housing cannot be increased.

  On the other hand, if the cooling air is allowed to flow horizontally from the front side to the rear side of the battery unit, the cooling air can be supplied to the rear of the battery pack in order to increase the cooling air flow rate and speed. It is necessary to install the cooling fan in the casing, and if the installation environment is limited, the casing may not be installed. Further, in Patent Document 1, it is considered that the above problem can be solved in an example in which a fan is installed in units of battery units. However, since the number of fans that are consumables is required in units of battery units, maintenance is required in large-scale power storage systems and the like. It becomes difficult to maintain quality.

  An object of the present invention is to increase the cooling efficiency of a battery pack, mount a large number of battery packs on a storage battery board, and cool the battery pack efficiently.

The power storage device of the present invention has a storage battery board having left and right side walls, a back wall, and a top wall, provided with an opening / closing door on the front side, and provided with a plurality of shelves with an interval in the vertical direction inside. A plurality of battery cells extending in the horizontal direction, and end plate members fixed to both ends of the battery cells, and a plurality of battery packs fixed to the shelf plate, provided on each of the shelf plates, A vent that forms a cooling flow path from the bottom side to the upper side in the storage battery panel so as to cross the battery cell, and the ceiling wall are provided, and the cooling flow path is directed from the bottom side to the upper side. A cooling fan that generates cooling air; and a first air introduction port that is provided at a lower end portion of the opening and closing door and includes a slit group that introduces external air into the cooling flow path from below the lowermost shelf. The part below the center of the door in the vertical direction Provided, and the second air inlet openings comprising a slit group for introducing external air on the front side of the battery pack, the external air introduced from the first air inlet on the underside of the lowermost of said shelf board And a second air guide plate that guides the external air flowing in from the second air introduction port between the shelf plates adjacent to each other in the vertical direction .

  In the power storage device of the present invention, the storage battery panel is provided with an interval in the vertical direction, and vents are formed in the shelf plates on which the battery packs are arranged, respectively, and the storage battery panel is provided with each vent hole. A cooling channel that guides the rising cooling air from the bottom side toward the upper side is formed. Cooling air flowing from the lower side to the upper side of the cooling flow path flows across the battery cells of the battery pack to cool the battery cells. The cooling air flowing in the direction crossing the battery cell is reliably abutted against the outer peripheral surface of the battery cell, and the battery pack can be reliably cooled. Thus, the battery pack cooling efficiency can be increased by directly exposing the battery cells of the battery pack to the cooling air without providing a battery unit case outside the battery pack. A large number of battery packs can be accommodated. Thereby, a large amount of electric power can be stored without increasing the size of the storage battery panel.

It is a front view which shows the electric power storage apparatus which is one Embodiment. It is a right view of FIG. It is a top view of FIG. It is a front view which shows the electric power storage apparatus in the state which removed the opening / closing door of the storage battery panel. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is CC sectional view taken on the line in FIG. It is the DD sectional view taken on the line in FIG. It is sectional drawing which shows the part similar to FIG. 8 in the electric power storage apparatus which is other embodiment. It is a perspective view of the plane side which shows a shelf board. It is a perspective view of the bottom face side which shows a shelf board.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 to 3, the power storage device 10 includes a housing, that is, a storage battery board 11. The storage battery board 11 has left and right side walls 12, 13, a back wall 14, and a top wall 15, and an opening / closing door 16 is provided on the front side so as to be opened and closed. The storage battery board 11 has side walls 12, 13, a back wall 14, and a top wall 15, which are fixed to pillars arranged at the four corners of the storage battery board 11.

  As shown in FIGS. 4 to 8, a plurality of shelf boards 18 are provided in the storage battery panel 11 at intervals in the vertical direction. Although the seven shelf boards 18 are provided in the storage battery board 11 to show in figure, the number of the shelf boards 18 is not restricted to the case where it shows in figure, It can be made into arbitrary numbers.

  A plurality of battery units, that is, battery packs 21 are fixed to each shelf board 18. As shown in FIGS. 4 to 8, each battery pack 21 has a plurality of battery cells 22, and the battery cells 22 are electrically connected in series. Each battery cell 22 is constituted by a cylindrical lithium ion secondary battery, and both end portions thereof are abutted against substantially quadrangular resin end plate members 23 and 24. Thus, the battery pack 21 has the plurality of battery cells 22 and the end plate members 23 and 24, and the front and rear end plate members 23 and 24 are connected by the connecting rod and the frame member. The outer peripheral surface is exposed to the outside without being covered by the case member. The battery pack 21 is fixed to the shelf plate 18 by end plate members 23 and 24. A battery fixing bracket 25 is attached to the shelf plate 18, and the battery pack 21 is attached to the shelf plate 18 by fixing the end plate member 23 with the battery fixing bracket 25. Although one battery pack 21 has six battery cells 22 as shown in the figure, the number of battery cells 22 provided in one battery pack 21 is not limited to six and can be any number. can do. The battery cells 22 do not contact each other, and a gap 26 is provided between the battery cells 22 as shown in FIG.

  One of the front and rear end plate members 23 and 24 constituting the battery pack 21 is a terminal plate, and the end plate members constituting the terminal plate are provided with terminal electrodes, and are adjacent to each other vertically. The terminal electrodes 21 are connected by a current-carrying member (not shown). Thereby, the battery pack 21 as a total of 28 secondary batteries is connected in series.

  As shown in FIGS. 10 and 11, the shelf board 18 is provided with a plurality of vent holes 27. As shown in the drawing, the plurality of vent holes 27 have slit shapes extending in the longitudinal direction of the shelf board 18. Further, a plurality of air intake ports 28 are provided at intervals in the longitudinal direction at the front and rear bent portions of the shelf board 18. In this way, when the vent holes 27 are provided in the shelf plates 18 to which the battery packs 21 are respectively attached, as shown by the broken-line arrows in FIG. 7, the space between the lowermost shelf plate 18 and the uppermost shelf plate 18 is increased. In this case, a cooling flow path 29 from the bottom side to the upper side of the storage battery panel 11 is formed by the vent holes 27 of the shelf board 18. The cooling flow path 29 is in a direction across the battery cell 22 because the battery cell 22 is horizontally disposed on the shelf board 18.

  A fan case 31 is provided on the top surface of the top wall 15. The fan case 31 has a front case piece 32a, left and right case pieces 32b and 32c, a rear case piece 32d, and an upper case piece 32e. Yes. As shown in FIG. 3, three cooling fans 33 are arranged in the fan case 31, and each cooling fan 33 is provided on the top wall 15 of the storage battery panel 11. When the cooling fan 33 is driven, the air in the storage battery panel 11 is discharged to the outside, and cooling air flowing through the cooling flow path 29 is generated. The cooling air flows in a direction crossing the outer peripheral surface of each battery cell 22 from the bottom side to the top side of the storage battery board 11. That is, the cooling air flows in a direction that crosses the battery cells 22.

  In order to introduce external air into the storage battery panel 11, an air inlet 34 is provided in the opening / closing door 16 on the front side of the storage battery panel 11. As shown in FIG. 1, the air inlet 34 is formed by a plurality of slits 35 extending in the vertical direction. By forming the plurality of slits 35 in a row in the left-right direction, that is, in the horizontal direction, An air inlet 34 is formed by the slit group. Two rows of slit groups 34a and 34b from the bottom are formed in the door 16 corresponding to the lower part of the shelf 18 at the bottom, and the third to fifth rows of slit groups 34c to 34e from the bottom are formed. The opening / closing door 16 is formed so as to correspond to a portion below the shelf 18 at the third step from the bottom. Further, a slit group 34f is formed in the open / close door 16 so as to correspond to the lower part of the fourth shelf board 18 from the bottom, and in the lower part of the fifth shelf board 18 from the bottom. Correspondingly, a slit group 34g is formed in the open / close door 16, and a slit group 34h is formed in the open / close door 16 corresponding to a portion below the shelf 18 in the sixth step from the bottom. By forming the air introduction ports 34 by slit groups, external air is introduced into the storage battery panel 11 in a state of being substantially uniformly dispersed in the horizontal direction.

  As shown in FIG. 1, the slit group constituting the air inlet 34 is provided in a portion below the center of the open / close door 16 in the vertical direction. External air introduced from the lower two rows of slit groups 34 a and 34 b flows into the cooling channel 29 from the lower side of the bottom shelf 18. On the other hand, the external air introduced from the slit groups 34 c to 34 h is introduced to the front side of the battery pack 21, and the shelf plates 18 adjacent to each other vertically from the air intake port 28 formed on the front surface of each shelf plate 18. It flows in between. Therefore, external air is replenished from each air intake port 28 so as to assist the cooling air supplied from the lower side of the bottom shelf 18 to the cooling flow path 29.

  As described above, the cooling fan 33 is disposed on the top wall 15 of the storage battery panel 11, and the air introduction port 34 is provided at a portion lower than the substantially central portion in the vertical direction of the opening / closing door 16. The sucked external air flows into the cooling flow path 29 from the lower part thereof and rises toward the cooling fan 33. Since the cooling air is heated by the battery cell 22, the cooling air rises due to the temperature rise, and the battery cell 22 can be reliably cooled. In the illustrated case, three cooling fans 33 are provided, but the number is not limited to three and may be any number according to heat generation. Moreover, as a mounting position of a cooling fan, it is good also as a form accommodated in a storage battery panel.

  As shown in FIG. 1, the front case piece 32a of the fan case 31 is provided with an air discharge port 36, and the air discharge port 36 is formed by a plurality of slits 37 extending in the vertical direction. By forming the plurality of slits 37 in a row in the left-right direction, that is, in the horizontal direction, the air discharge port 36 is formed by the slit group. As a result, the air after cooling the battery cell 22 by flowing through the cooling flow path 29 by the cooling fan 33 is dispersed uniformly from the front case piece 32a and discharged to the front of the storage battery panel 11. Is done. The air discharge port 36 is formed in accordance with the direction of exhaust of the fan.

  As shown in FIG. 7 and FIG. 8, in order to guide the outside air that has flowed into the storage battery panel 11 from the air inlet 34 toward the inside of the open / close door 16 toward the upper and lower adjacent shelf plates 18. A plurality of air guide plates 41a to 41e are provided at intervals in the vertical direction. Each of the air guide plates 41a to 41e suppresses the outside air flowing into the storage battery panel 11 from the air introduction port 34 from flowing upward through a gap between the opening / closing door 16 and the front surface of the battery pack 21, External air is guided toward the battery pack 21.

  As shown in FIG. 4, the air guide plates 41 a to 41 e are provided in the left and right open / close doors 16 at predetermined intervals in the vertical direction. In FIG. 4, the right air guide plates 41 a to 41 e are provided. Is shown by a solid line, and the left air guide plates 41a to 41e are shown by two-dot chain lines. In FIG. 4, the opening / closing door 16 is removed, and the positional relationship of the air guide plate attached to the opening / closing door 16 with respect to the shelf board 18 is indicated by a solid line and a two-dot chain line.

  The air guide plates 41a to 41e shown in FIG. 7 and FIG. 8 protrude in the horizontal direction toward the battery pack 21, and the external air guided toward the battery pack 21 by the air guide plate is a shelf plate. 18 is introduced into the cooling flow path 29 from the air intake port 28 formed on the front surface of the air 18.

Each of the air guide plates is attached to the inner surface of the door 16 in the illustrated case, but the air guide plates may be attached to the left and right side walls 12 and 13 on the front side of the storage battery panel 11. Thus, in a form so as to attach the air guide plate to the side wall, when fixing the baffle plate to the shelf plate 18, Ki de also be fixed to the side wall of the shelf plate 18 via the air guide plate, the shelf The mounting strength of the plate 18 can be increased.

  The lowermost air guide plate 41a shown in FIG. 7 guides the external air introduced from the lower two rows of slit groups 34a and 34b to the lower side of the lowermost shelf 18. The second baffle plate 41b from the bottom guides the external air introduced from the third to fifth rows of slit groups 34c to 34e from the bottom toward the battery pack 21 facing the slit group. Similarly, the other air guide plates 41c to 41e guide the external air introduced from the slit groups 34f to 34h toward the battery pack 21 facing the slit group, respectively.

  As shown in FIGS. 7 and 8, a partition plate 42 is provided on the back side of each shelf plate 18 to partition the gap between the shelf plate 18 and the back wall 14. The cooling air is prevented from flowing from the gap between the back wall 18 and the back wall 14 toward the upper side of the storage battery panel 11. Thereby, the cooling air is reliably guided toward the battery cell 22.

  As shown in FIGS. 4 and 8, an auxiliary cooling fan 43 is disposed at the bottom of the storage battery panel 11. The auxiliary cooling fan 43 sucks the external air introduced from the air introduction port 34 into the storage battery panel 11 and introduces it into the cooling flow path 29 as an auxiliary. In order to guide the air sucked into the auxiliary cooling fan 43 toward the lowermost battery cell 22, that is, the lower end portion of the cooling flow path 29, the bottom of the storage battery panel 11 is moved toward the back side of the storage battery panel 11. A bottom air guide plate 44 is provided. Thereby, the external air sucked by the auxiliary cooling fan 43 is supplied to the cooling flow path 29 without going around to the back side of the storage battery board 11. As shown in FIG. 5, two auxiliary cooling fans 43 are provided at the bottom of the storage battery board 11, but the number of auxiliary cooling fans 43 can be any number. If the cooling fan 33 can generate a cooling air flow with a sufficient flow rate in the cooling flow path 29, the auxiliary cooling fan 43 can be omitted. Furthermore, as shown in the drawing, the auxiliary cooling fan 43 may be disposed above the bottom shelf 18 without being disposed below the bottom shelf 18 as shown in the drawing. .

  A base plate 45 is provided on the upper side of the uppermost battery pack 21. The base plate 45 is provided with a vent as in the case of the shelf plate 18, and the cooling air that has passed through the vent is cooled by a cooling fan. It flows toward 33 fan inlets. A support plate 46 is provided near the front side of the storage battery board 11 on the base plate 45, and a control unit 47 is attached to the back side of the support plate 46. The control unit 47 is arranged so as not to disturb the cooling air flow path of the battery pack.

  An operation member such as a breaker 48 is provided on the front surface of the support plate 46. A partition plate 49 is provided in front of the support plate 46 so as to cover the support plate 46, and the partition plate 49 suppresses air from flowing to the inner surface of the open / close door 16 in the upper part of the storage battery panel 11. . In order to operate the breaker 48 from the front side of the storage battery board 11, the partition plate 49 is provided with an opening window 51 of the breaker.

  In the power storage device 10 described above, a plurality of battery packs 21 are attached to the shelf plate 18 that is disposed in the storage battery panel 11 at intervals in the vertical direction. The battery pack 21 includes a plurality of battery cells 22 made of lithium ion secondary electricity or the like, and the battery cells 22 are positioned on the shelf board 18 in the horizontal direction. Each shelf plate 18 is provided with a vent 27, and a cooling channel 29 is formed in the storage battery panel 11 from the lower side to the upper side by the vent 27. In the cooling flow path 29, cooling air directed upward is generated by a cooling fan 33 provided in the storage battery panel 11, and the cooling air flows around the battery cell 22 in a direction crossing the battery cell 22. Thereby, even if the battery cell 22 generates heat during charging and discharging, the battery cell 22 can be reliably cooled by the cooling air.

  FIG. 9 is a cross-sectional view showing a storage battery board 11 according to another embodiment. In FIG. 9, the same code | symbol is attached | subjected to the member which is common in the member which comprises the storage battery panel 11 mentioned above. As shown in the drawing, the air guide plates 41 a to 41 e provided inside the opening / closing door 16 are inclined downward from the opening / closing door side toward the inside of the storage battery panel 11. Therefore, the external air introduced into the storage battery panel 11 from the air introduction port 34 is introduced downward toward the cooling flow path 29 by the air guide plates 41a to 41e, and then flows through the cooling flow path 29 upward. Become a wind. As described above, when external air is introduced downward on the inner surface of the open / close door 16, the amount of external air supplied to the cooling flow path 29 can be increased, and the cooling effect can be enhanced.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  This power storage device is applied to supply power in factories and office buildings.

Claims (7)

A storage battery panel having left and right side walls, a back wall and a top wall, provided with an open / close door on the front side, and provided with a plurality of shelves spaced in the vertical direction inside,
A plurality of battery cells extending in the horizontal direction, and end plate members fixed to both ends of the battery cells, and a plurality of battery packs fixed to the shelf board;
Ventilation holes provided on each of the shelf plates, and forming a cooling channel from the bottom side to the top side in the storage battery panel so as to cross the battery cells,
A cooling fan that is provided on the top wall and generates cooling air from the bottom side to the upper side in the cooling channel;
A first air inlet comprising a slit group provided at a lower end portion of the open / close door and introducing external air into the cooling flow path from below the bottom shelf plate;
A second air introduction port formed of a slit group that is provided in a portion below a substantially central portion in the vertical direction of the opening and closing door and introduces external air to the front side of the battery pack;
A first air guide plate that guides the external air flowing in from the first air introduction port toward the lower side of the shelf on the lowest stage;
A power storage device comprising: a second air guide plate that guides external air flowing in from the second air introduction port toward the upper and lower adjacent shelf plates . The power storage device according to claim 1 , wherein the air guide plate is inclined downward from the opening / closing door side toward the inside of the storage battery panel. 3. The power storage device according to claim 1 , wherein an air intake port that takes in external air introduced from the air introduction port into the cooling flow path is provided in front of the shelf board. 4. In power storage device according to any one of claims 1 to 3, and fixed to the shelf plate is fixed to the baffle plate before Symbol sidewalls, securing the shelves to the side wall by the baffle plate A power storage device. The power storage device according to any one of claims 1 to 4 , wherein an auxiliary cooling fan that sucks external air into the storage battery panel is provided at a bottom portion of the storage battery panel. The power storage device according to claim 5 , wherein a bottom air guide plate that guides the external air sucked by the auxiliary cooling fan toward the battery cell at the lowermost stage is provided close to the back side of the storage battery board. Power storage device. The power storage device according to any one of claims 1 to 6 , wherein the cooling fan is arranged close to the back side of the top wall, and extends vertically to the top of the storage battery panel toward the front side. A power storage device comprising a plate, a control unit provided on the back side of the partition plate, and cooling air flowing through the cooling flow path and flowing to the cooling fan flowing around the control unit.